vehicle side airbag device

专利摘要:
SIDE AIRBAG DEVICE FOR VEHICLE. The present invention relates to improving the passenger containment performance of a side airbag in which a front bag section and a rear bag section are divided by a front / rear partition section. When the side airbag (20) in that side airbag device is deployed in an expanded state, the expansion of the rear bag section (26) in the front-rear direction of the vehicle is suppressed by the tensioned fabric (56), which extends between the front / rear partition section (40) and rear end section of the rear bag section (26), being stretched. Thus, the expansion width of the rear bag section (26) in the width direction of the vehicle can be increased without significantly changing the position of the front / rear partition section (40) in the front-rear direction of the vehicle. However, when the side airbag (20) is deployed in a flat state, the tensioned fabric (56) extends between the rear end section of the rear bag section (26) and the front / rear partition section (40) that it was folded in two to project towards the rear bag section (26). Thus, the dimensions of each section can be defined in a way in (...).
公开号:BR112015032596B1
申请号:R112015032596-3
申请日:2014-06-06
公开日:2021-02-02
发明作者:Yusuke Fujiwara
申请人:Toyota Jidosha Kabushiki Kaisha；
IPC主号:

专利说明:

TECHNICAL FIELD
[001] The present invention relates to a side airbag device for a vehicle. BACKGROUND OF THE TECHNIQUE
[002] In a side airbag device described in Patent Literature 1 below, a side airbag is divided into a first inflation section (rear bag section) and a second inflation section (front bag section) by a wall partition (front-rear partition) arranged in a position that corresponds to a rib region of an occupant in the position. An inflator is provided within the first inflation section and the gas generated from the inflator is supplied through communication ports formed in the front-rear partition to the front bag section. With such a configuration, the rear bag section is defined to have a higher pressure than that of the front bag section, thus ensuring an initial containment performance for an occupant in position and also suppressing the influence on the occupant even if the occupant is in position. inappropriate position (out of position). Examples of conventional technology related to the present invention include Patent Literature 2 to 6 below. Citation List Patent Literature
[003] Patent Literature 1: Publication of Patent Application in JP 2012-025182
[004] Patent Literature 2: Publication of Patent Application in JP 2011-240807
[005] Patent Literature 3: Publication of Patent Application in JP 2008-201172
[006] Patent Literature 4: Patent Application Publication in JP 2008-201175
[007] Patent Literature 5: Publication of Patent Application in JP 2014-031096
[008] Patent Literature 6: Publication of Patent Application in JP 2014-031051 SUMMARY OF THE INVENTION Technical problem
[009] In the aforementioned side airbag, a position in the front-rear direction of the vehicle from the front-rear partition is determined by an inflation width in the front-rear direction of the vehicle from the rear bag section. The inflation width in the front-rear direction of the vehicle from the rear bag section is varied depending on an inflation width in a vehicle width direction from the rear bag section. When gas is supplied to the rear bag section, the gas pressure is uniformly applied to an internal surface of the rear bag section; therefore, if the inflation width in the vehicle width direction of the rear bag section is changed, the inflation width in the front-rear direction of the vehicle of the rear bag section is also changed, so that the position in the front- rear of the vehicle from the front-rear partition is varied. In order to avoid this, the flexibility in defining the inflation width in the vehicle width direction of the rear bag section becomes less; therefore, there is no room for improvement in the light of the improved side airbag occupant containment performance.
[0010] Considering the above facts, an objective of the present invention is to achieve a side airbag device for a vehicle that has the ability to improve occupant containment performance of a side airbag in which a front bag section and an air bag section. rear bag are divided by a front-rear partition. Solution to the Problem
[0011] A side airbag device for a vehicle according to a first aspect of the present invention includes: a gas generator supplied to a vehicle seat, the gas generator being activated in order to generate gas for inflation and deployment ; and a side airbag divided by a leaf-shaped front-rear partition in a front bag section and a rear bag section, the side airbag housed in a folded state on a side section of a vehicle seatback, the side airbag driven to inflate and deploy towards a front direction of the vehicle from the side section supplying the gas for inflation and deployment in each of the bag sections, in which, in a flat developed state of the side airbag, the partition front-rear is folded in two so that it protrudes towards the rear bag section along a folded portion of it located in a central portion in a wide direction, and a stretchable member is disposed in an extensible and transversal way between the front-rear partition and a rear end of the rear bag section and, in a state of inflation and deployment of the side airbag, the stretchable member is stretched so as to restrict inflation in one direction. front-rear section of the vehicle from the rear bag section.
[0012] In a first aspect, when a side impact of the vehicle is detected or predicted, for example, the gas generator is activated. The gas from the gas generator is then supplied to the front and rear bag sections of the side airbag in order to cause the side airbag to inflate and deploy. In the state of inflation and unfolding, the stretchable member arranged in an extensible and transversal manner between the front-rear partition and the rear end of the rear bag section of the side airbag is stretched. Therefore, inflation in the front-rear direction of the vehicle in the rear bag section is restricted and thus it is possible to increase the inflation width in the vehicle width direction of the rear bag section without significantly changing the position in the front-rear direction. of the front-rear partition. As a result, it is possible to improve the side airbag's occupant containment performance.
[0013] Additionally, in a flat developed state of the side airbag, the stretchable member is arranged transversely between the front-rear partition folded in two so that it protrudes towards the rear bag section and the rear end of the rear section. rear bag. Thus, it is possible to define each component of the side airbag so as not to cause any redundancy (arching) in the rear bag section in the flat developed state; therefore, it is possible to compactly fold the side airbag without becoming bulky.
[0014] In a side airbag device for a vehicle according to a second aspect of the present invention, in the first aspect, the stretch member is connected to a central portion in a wide direction of the front-rear partition.
[0015] In the second aspect, when the stretchable member is stretched, the central portion in the wide direction of the front-rear partition is pulled towards the rear end of the rear bag section. Consequently, it is possible to cause the rear bag section to inflate in the wide direction of the vehicle at equilibrium.
[0016] In a side airbag device for a vehicle according to a third aspect of the present invention, in the first or second aspect, all or part of the stretch member is configured by a rectifying member that rectifies the gas for inflation and deployment .
[0017] In the third aspect, all or part of the stretchable member is commonly used as the rectifying member, thereby reducing the number of components. Therefore, it is possible to simplify a configuration of the side airbag by the reduced number of components.
[0018] In a side airbag device for a vehicle according to a fourth aspect of the present invention, in the third aspect, the side airbag includes a lower bag section divided by a top-to-bottom partition of the front bag section and the rear bag section, and the gas for inflation and deployment is guided by the rectifying member that forms the part of the stretch member for the lower bag section.
[0019] In the fourth aspect, the rectifying member that forms part of the stretchable member has the function of guiding the gas for inflation and deployment to the lower bag section; therefore, it is possible to simplify the configuration of the side airbag that includes the lower bag section.
[0020] In a side airbag device for a vehicle according to a fifth aspect of the present invention, in the fourth aspect, the gas from the gas generator disposed within the rear bag section is supplied to the lower bag section, and the air bag side is provided with a check valve that restricts a flow of gas from an interior of the lower bag section to an interior of the rear bag section.
[0021] In the fifth aspect, the side airbag includes the check valve mentioned above and, thus, it is possible to maintain the internal pressure of the bag section below a high pressure for a long time. Consequently, it is possible to effectively restrict the lumbar region which has a relatively high load resistance on the occupant's body by the lower bag section, for example.
[0022] In a side airbag device for a vehicle according to a sixth aspect of the present invention, in any one of the first to the fifth aspects, in the two lower and upper portions on both sides of the front-rear partition with the limb stretchable between them or on either side of the front-rear partition, a pair of communication doors are formed that communicate an interior of the front bag section and the interior of the rear bag section with each other, and the gas the gas generator disposed within the rear bag section is supplied through the pair of communication ports to the front bag section.
[0023] In the sixth aspect, the pair of communication ports mentioned above is formed in the front-rear partition. Therefore, even in the configuration of supplying the stretch member transversely between the front-rear partition and the rear end of the rear bag section, it is preferably possible to supply the gas from the gas generator within the rear bag section to the section front bag.
[0024] In a side airbag device for a vehicle according to a seventh aspect of the present invention, in the first aspect, a front end of the stretch member branched in two from the top-down direction of the side airbag is connected to the partition front-rear.
[0025] In the seventh aspect, the front end of the stretchable member connected to the front-rear partition is branched in two from the top-down direction of the side airbag and, thus, it is possible to prevent a pulling force inserted in the front- rear end to be concentrated in a single position of the front-rear partition at the time of tensioning the stretch limb. Consequently, it is possible to suppress the unprepared flexion of the front-rear partition at the time of tensioning of the stretchable limb (ie, at the time of inflation and deployment of the side airbag).
[0026] In a side airbag device for a vehicle according to an eighth aspect of the present invention, in the seventh aspect, in the front-rear partition, the communication doors that communicate the interior of the front bag section and the interior of the section rear bag with each other are formed between the branched front ends of the stretchable member.
[0027] In the eighth aspect, the communication ports mentioned above are formed in the front-rear partition. Therefore, even in the configuration of supplying the stretch member of which the front end is branched in two transversely between the front-rear partition and the rear end of the rear bag section, the gas generated from the gas generator within the section rear bag can be supplied to the central portion in the wide direction in the front bag section. Consequently, it is possible to stabilize the deployment behavior of the side airbag.
[0028] In a side airbag device for a vehicle according to a ninth aspect of the present invention, in any one of the first to eighth aspects, an upper portion of the front-rear partition is provided with an upper partition that extends obliquely upwards in a forward direction of the seatback in the inflated and deployed side airbag state, and a front extension portion disposed above the rear bag section is divided from the front bag section by the upper partition.
[0029] In the ninth aspect, by defining the upper partition as above, it is possible to suppress the increase in the volume of the rear bag section as well as preferably restrict the occupant's shoulder region by the upper part of the rear bag section , that is, the front extension portion. For example, even if the shape of the side impact is a so-called oblique side impact, and even if the occupant experiences an inert movement in the obliquely forward direction of the vehicle, it is possible to prevent the occupant's shoulder region from being outside the extension portion. forward. Therefore, regardless of the shape of the side impact, it is possible to preferentially restrict the occupant's shoulder region by the side airbag.
[0030] Furthermore, the inward surface in the width direction of the vehicle of the front bag section in the state of inflation and unfolding is curved so that a portion higher than the center in the direction from top to bottom extends further out in the vehicle's width direction as it extends further up. Consequently, the side airbag and the occupant get relatively closer to each other due to the impact of the side impact, so that the curved surface above comes in sliding contact with the occupant's upper arm region, thus generating a pushing force up the upper arm region. As a result, the upper arm region is pushed upwards from the front bag section and is restricted by the front extension portion. Thus, it is possible to suppress the intervention of the upper arm region between the occupant's chest region and the side airbag, thus reducing the load on the chest region.
[0031] In a side airbag device for a vehicle according to a tenth aspect of the present invention, in any one of the first to ninth aspects, the front-rear partition is configured by the base fabrics of the front bag section or the rear bag section.
[0032] The tenth aspect is configured above; therefore, compared to the case of configuring the front-rear partition by a material of a different body from the base fabrics of the front bag section or the rear bag section, it is possible to simplify the configuration of the side airbag.
[0033] In a side airbag device for a vehicle according to an eleventh aspect of the present invention, in any one of the first to third aspects, the side airbag device additionally includes a rectifying member which is formed in a cylindrical shape it is disposed within the rear bag section and houses the gas generator within it, where the gas for inflation and deployment is supplied from the upper and lower openings of the rectifying member to the rear back section.
[0034] In the eleventh aspect, it is possible to bring the upper portion and the lower portion of the rear bag section to inflate and unfold in an initial state with a high pressure by the gas for inflation and unfolding supplied from the upper and lower openings of the rectifying member to the rear bag section.
[0035] In a side airbag device for a vehicle according to the twelfth aspect of the present invention, in any one of the first to the eleventh aspects, in the flat developed state, the dimensions of each component of the side airbag are thus defined so as not to cause any redundancy in any of the front-rear partitions, the base tissues of the rear bag section and the stretch member.
[0036] The twelfth aspect is configured above; therefore, it is possible to contribute to the effect that allows the compact folding of the side airbag without becoming bulky.
[0037] In a side airbag device for a vehicle in accordance with the thirteenth aspect of the present invention, in the fifth aspect, the check valve is configured by the base fabrics of the rear bag section and protrudes into the section of the rear bag. bottom bag.
[0038] In the thirteenth aspect, the check valve that is configured using the base fabrics of the rear bag section and protrudes into the lower bag section is pressed and crushed due to the increase in the internal pressure of the bag section bottom. Consequently, it is possible to restrict the flow of gas from the interior of the lower bag section to the rear bag section. In addition, the check valve is configured using the base fabrics of the rear bag section; therefore, it is possible to simplify the configuration of the side airbag.
[0039] In a side airbag device for a vehicle according to a fourteenth aspect of the present invention, in the thirteenth aspect, the rectifying member includes an external rectifying member and an internal rectifying member, each of which is formed in a cylindrical shape that has openings in the upper and lower portions thereof, the external rectifying member forms part of the stretchable member, and a lower portion of the external rectifying member is inserted into the check valve, the internal and external rectifying member houses the gas generator inside of it, and a lower portion of the internal rectifying member is inserted into the external rectifying member.
[0040] In the fourteenth aspect, the gas generated from the gas generator is rectified by the internal rectifying member and the external rectifying member and is then supplied to the rear bag section and the lower bag section. Therefore, the dimensions and others of the internal rectifying member and the external rectifying member are appropriately altered, thereby altering a gas distribution ratio for the rear bag section and the lower bag section. Advantageous Effect of the Invention
[0041] As explained above, in the side airbag device for a vehicle according to the present invention, it is possible to improve the occupant containment performance of the side airbag in which the front bag section and the rear bag section are divided by front-rear partition. BRIEF DESCRIPTION OF THE DRAWINGS
[0042] [Figure 1] Figure 1 is a side view of a vehicle seat configured by applying a side airbag device to a vehicle according to a first embodiment of the present invention and is a drawing showing a state in which the side airbag inflates and deploys.
[0043] [Figure 2] Figure 2 is a side view showing a state of inflation and an expanded deployment of the side airbag.
[0044] [Figure 3] Figure 3 is a sectional view showing a section taken along line F3-F3 in Figure 2.
[0045] [Figure 4] Figure 4 is a sectional view showing a scaled-down section taken along line F4-F4 in Figure 2.
[0046] [Figure 5] Figure 5 is a sectional view corresponding to Figure 3 and shows a flat developed state of the side airbag.
[0047] [Figure 6A] Figure 6A is a schematic plan sectional view showing a state of inflation and deployment of a side airbag according to a first comparative example.
[0048] [Figure 6B] Figure 6B is a schematic sectional view showing a state of inflation and deployment of the side airbag according to the first modality.
[0049] [Figure 7] Figure 7 is a sectional view corresponding to Figure 5 and shows a flat developed state of a side airbag according to a second comparative example.
[0050] [Figure 8] Figure 8 is a sectional view corresponding to Figure 3 and shows a state of inflation and deployment of a side airbag that is a component of a side airbag device for a vehicle according to a second modality of the present invention.
[0051] [Figure 9] Figure 9 is a sectional view corresponding to Figure 3 and shows a state of inflation and deployment of a side airbag that is a component of a side airbag device for a vehicle according to a third modality of the present invention.
[0052] [Figure 10] Figure 10 is a side view that corresponds to Figure 2 and shows the state of inflation and deployment of the side airbag.
[0053] [Figure 11] Figure 11 is a side view that corresponds to Figure 2 and shows a state of inflation and deployment of a side airbag that is a component of a side airbag device for a vehicle according to a fourth modality of the present invention.
[0054] [Figure 12] Figure 12 is a side view that corresponds to Figure 3 and shows the state of inflation and deployment of the side airbag.
[0055] [Figure 13] Figure 13 is a sectional view corresponding to Figure 3 and shows a state of inflation and deployment of a side airbag that is a component of a side airbag device for a vehicle according to a fifth modality of the present invention.
[0056] [Figure 14] Figure 14 is a sectional view corresponding to Figure 3 and shows a variation of the side airbag according to the first embodiment of the present invention. MODE FOR CARRYING OUT THE INVENTION First modality
[0057] A side airbag device for a vehicle 10 according to a first embodiment of the present invention will be explained with reference to Figure 1 to Figure 7. The FR Arrow, UP Arrow and OUT Arrow as appropriately described in each drawing indicate a forward direction (forward direction), an upward and outward direction in a vehicle-wide direction, respectively. From now on, in the explanation using only the front-rear and top-down directions, they will be indicated as front or rear in the front-rear direction of the vehicle and up or down in the top-down direction of the vehicle, unless than otherwise specified. (Settings)
[0058] As shown in Figure 1, the side airbag device 10 according to the first modality is mounted on a side section of the door side 14A (a side section located outwardly in a vehicle-wide direction: a side section on the side door side not shown) of a seat back 14 on a vehicle seat 12. Seat back 14 is recliningly connected to the rear end of a seat cushion 16 and a headrest 18 is attached to a upper end of it.
[0059] In the present mode, the front-rear direction, a right-to-left direction (width direction) and a top-to-bottom direction of the vehicle seat 12 coincide with a front-rear direction, a right-to-left direction. (wide direction) and a top-down direction of the vehicle. In Figure 1, a mannequin P for a side impact test is seated on the vehicle seat 12 instead of an actual occupant. The P mannequin is an AM50 (model that covers 50% of adult American men) from WorldSID (World Side Impact Mannequin), for example. Henceforth, for the sake of explanation, the mannequin P is referred to as an "occupant P".
[0060] The side airbag device 10 includes a side airbag 20 and an inflator 22 (gas generator) that generates the gas in the side airbag 20 as main components. The side airbag 20 is folded in a unified (modularized) state together with the inflator 22 and others and is arranged (housed) within the side section of the door side 14A. The side airbag 20 inflates and deploys between the occupant P and the side door not shown by a pressure of the gas generated from the inflator 22 (a state as shown in Figure 1). At the time of inflation and deployment, it is configured that a seat back cushion and an outer seat skin (both not shown in the drawings) arranged on the side section of the door side 14A receive an inflation pressure from the side airbag 20 in order to fractured. The front-rear and top-down directions of the side airbag 20 as described in the following explanation indicate the respective directions in a state where the side airbag 20 inflates and deploys and substantially coincides with the front-rear and top-down directions. of the seat backrest 14.
[0061] As shown in Figure 1 to Figure 5, the side airbag 20 is a so-called double-chamber side airbag configured so that its interior is divided into a front section and a rear section and a front bag section 24 and a rear bag section 26 are integrally sewn. The rear bag section 26 is formed by overlapping and sewing two base fabrics 28, 30 which are cut from a cloth material made of nylon or polyester, for example. The front end portions of the base fabrics 28, 30 are sewn on a T1 seam, and the upper end portions, lower end portions and the rear end portions thereof are sewn on an outer peripheral seam T2 defined on a periphery side airbag 20. In Figure 1, seams T1, T2 and seams T3 to T5 described later are not shown in the drawing.
[0062] The front bag section 24 is formed by overlapping and sewing two base fabrics 32, 34 formed of a cloth material similar to that of the base fabrics 28, 30. The upper end portions, the front end portions and the lower end portions of the base fabrics 32, 34 are sewn to the outer peripheral seam T2, and the front portion of the rear bag section 26 is retained between the rear edges of the base fabrics 32, 34. The rear edges of the base fabrics bases 32, 34 are sewn to the front portions of the base fabrics 28, 30 at seams T3, T4.
[0063] If the inflation and deployment state of the side airbag 20 is seen in a side view as shown in Figure 1 and Figure 2, the side airbag 20 is formed in a substantially long oval shape that extends in the direction from top to under the backrest 14 and is defined as being large enough to restrict a shoulder S region, a chest C region, an abdominal region B and a lumbar region L of the occupant P. In the state of inflation and unfolding, the section front bag section 24 is located in a forward position of the vehicle of the rear bag section 26. An interior of the front bag section 24 is defined as a front chamber 36 and an interior of the rear bag section 26 is defined as a rear chamber 38.
[0064] The front bag section 24 and the rear bag section 26 are divided by a front-rear partition 40 (front-rear split limit) in a sheet format, which is configured by the base fabrics 28, 30 (front portion of the rear bag section 26) which are arranged inside the side airbag 20. The front-rear partition 40 includes a vertical partition 40A that extends in the top-down direction of the seat back 14 and an upper partition 40B (tilt partition) extending obliquely upward in a forward direction of the seat back 14 from an upper end of the vertical partition 40A.
[0065] The method for producing side airbag 20 is not limited to the above and can be appropriately changed. For example, it can be configured that a single base fabric is folded in two, an outer peripheral portion of it is sewn into a bag body and the front-rear partition is formed using a boundary (partition cloth) that it is a different body from the base fabric in the form of a bag. For example, it can be configured that, although the vertical partition is formed using the above boundary (partition cloth) which is the different body, the upper partition is formed using the seam (sewn portion) on which the fabric of base in the form of bag is sewn; and the configuration of the front-rear partition can be appropriately changed. Specifically, the front-rear partition can be formed in any way until the front-rear partition is formed in a sheet format.
[0066] Within the rear bag section 26, a rectifying cloth 42 is provided as the rectifying member. Grinding cloth 42 is formed in a cylindrical shape by sewing a base fabric 46 (see Figure 3) formed from a cloth material similar to that of the base fabrics 28, 30 or similar in a T5 seam (not shown) in Figure 1 and Figure 2). The grinding cloth 42 is arranged in a rear position of the rear bag section 26 so that an axial direction of the grinding cloth 42 extends along the top-down direction of the seat back 14.
[0067] Additionally, the inflator 22 is housed in the rear bag section 26. The inflator 22 is a so-called cylinder type inflator and is formed in a cylindrical shape. The inflator 22 is arranged in the rear bag section 26 so that an axial direction of the inflator 22 extends along the top-down direction of the seat back 14 and is housed within the grinding cloth 42.
[0068] From an outer periphery of the inflator 22, a pair of upper and lower studs 48 protrude inward in the width of the vehicle (inward in the direction of the seat width). The studs 48 extend through the base fabrics 46, 28 and also through a side frame 15A of a seat backrest frame 15, and the nuts 50 are screwed into the front ends of the studs 48. Thus, the inflator 22 is attached together with the side airbag 20 to be attached to the side frame 15A (called the side mount). The studs projecting from the outer periphery of the inflator 22 in the rearward direction of the vehicle can be configured to extend through the base tissues 46, 28 and a support (a reaction force plate) that has a flat section L-shaped fixed to the side frame 15A and are then screwed to the nuts (called posterior fixation).
[0069] As shown in Figure 1, a side impact ECU 52 mounted on the vehicle is electrically connected to the inflator 22. A side impact sensor 54 to detect a side impact is electrically connected to the side impact ECU 52. The impact ECU side 52 is configured to actuate the inflator 22 when detecting (avoiding) a side impact based on a signal from the side impact sensor 54. If a pre-collision sensor anticipates (predicts) that a side impact is electrically connected to the ECU of side impact 52, inflator 22 can be configured to act when the side impact ECU 52 anticipates side impact based on a pre-collision sensor signal.
[0070] Additionally, in the present embodiment, within the rear bag section 26, a tension cloth 56 is provided as a stretch member (stretch cloth: thickness restriction limit). The tension cloth 56 is formed by a similar cloth material in a rectangular shape to the east of the base fabrics 28, 30 or similar, and a front edge of it is sewn at the T1 seam to a central portion in the width direction of the partition front-rear 40, and a rear edge thereof is sewn on the outer peripheral seam T2 to a rear edge of the rear bag section 26. Specifically, this tension cloth 56 is provided extensively and transversely between the front and rear ends of the rear bag section 26. In the inflated and deployed state of the side airbag 20, the tension cloth 56 is disposed in the vicinity of a central portion in the top-down direction in the rear bag section 26 so that the direction of the thickness of the even if it extends along the width of the vehicle.
[0071] Part of the tension cloth 56 is retained between the base fabric 28 and the rectification cloth 42, and the upper and lower studs 48 of the inflator 22 extend through the tension cloth 56. As shown in Figure 3, on the front-rear partition 40, communication ports 58, 60 (not shown in Figure 1 and Figure 2) are formed on both the right and left sides (both sides in the wide direction) of the front-rear partition 40 respectively with the tension cloth 56 located between them. Via the pair of communication ports 58, 60, the interior of the front bag section 24 and the interior of the rear bag section 26 are communicated with each other. It can be configured that, in the front-rear partition 40, in two positions in the vertical direction on each one between the right and left sides (one side in the width direction) of the tension cloth 56, a pair of communication ports is formed which communicate the interior of the front bag section 24 and the interior of the rear bag section 26 with each other. The number of communication ports and their forming portions in the front-rear partition 40 can be appropriately changed.
[0072] In the side airbag device 10 as configured above, when the inflator 22 is actuated, the gas is radially injected from a gas injection port arranged at an upper end or a lower end of the inflator 22. The injected gas from the gas injection port it is supplied from the top and bottom openings of the grinding cloth 42 to the rear bag section 26 (see Arrows G1, G2 of Figure 2). Part of the gas supplied to the rear bag section 26 is supplied via communication ports 58, 60 to the front bag section 24 (see Arrow G3 in Figure 2). Therefore, the side airbag 20 inflates and deploys between the occupant P and the side section of the interior vehicle (in this document, a door trim not shown for the side door).
[0073] As shown in Figure 1 and Figure 2, in the state in which the side airbag 20 inflates and deploys, the front bag section 24 and the rear bag section 26 are arranged side by side in the front-rear direction of the vehicle . In the state, the front bag section 24 inflates and unfolds laterally in the front (front half) of the chest C region, the abdominal region B and the lumbar region L of the occupant P, and the rear end of an upper edge (upper partition) 40B) of the front bag section 24 is then disposed in the vicinity of the lower part of a U underarm region of the occupant P. On the other hand, the rear bag section 26 inflates and unfolds laterally from the rear (rear half) of the chest region C, abdominal region B and lower back L of occupant P and a front extension portion 26A extends laterally from shoulder S of occupant P to the forward direction of the vehicle and is arranged above the bag section front 24. Hereafter, the side airbag 20 in the inflation and deployment state will be described in detail.
[0074] In the side airbag 20, when the rear bag section 26 inflates and unfolds, the tension cloth 56 whose front end is sewn (connected) to the front end (front-rear partition 40) of the rear bag section 26 and whose the rear end is sewn (connected) to the rear end of the rear bag section 26 is stretched in the front-rear direction of the vehicle. Therefore, the position in the front-rear direction of the vehicle of the front-rear partition 40 (vertical partition 40A) is restricted. The tension cloth 56 is defined so that the linear dimension in the front-rear direction of the vehicle of the side airbag 20 in the inflated and deployed state becomes shorter than an inflation width in the front-rear direction of the section vehicle rear bag 26 if no tension cloth 56 is provided. Therefore, in the present embodiment where tension cloth 56 is provided extensively and transversely between the front and rear ends of the rear bag section 26, the tension 56 is stretched to restrict inflation of the rear bag section 26 in the front-rear direction of the vehicle and also to widen (increase) the inflation width in the vehicle width direction of the rear bag section 26.
[0075] It is unnecessary to match the aforementioned linear dimension to a linear dimension b (see Figure 3) described later as the linear dimension is defined so as to restrict inflation of the rear bag section 26 in the front-rear direction of the vehicle at the time of inflation and deployment of the side airbag 20.
[0076] By restricting the position in the front-rear direction of the vehicle from the front-rear partition 40 as described above, the front-rear partition 40 is configured to face a central portion in the front-rear direction (center in the front direction - rear or a proximity to the center in the front-rear direction: a portion that extends further out in the vehicle's width direction) from the occupant's chest C region. Consequently, it is configured that the front bag section 24 is located laterally from the front of the chest C region, the abdominal region B and the lumbar region L of the occupant P, and the rear bag section 26 is located laterally from the rear region of the chest region C, the abdominal region B and the lumbar region L of occupant P.
[0077] In the side airbag 20, the inflation width (dimension in the vehicle's wide direction; it must now apply) from the front (front bag section 24) below the front extension portion 26A is defined as being smaller than the inflation width of the rear (body of the rear bag section 26) below the front extension portion 26A. In the side airbag 20, the inflation width of the front extension portion 26A is defined as being less than the inflation width of the front bag section 24. Defining the inflation width of the front extension portion 26A as being less than that the inflation width of the front bag section 24 as mentioned earlier, as shown in Figure 4, the inward surface in the width direction of the vehicle in the upper portion of the front bag section 24 is configured as an upper arm pressing surface 62 which is curved so that it extends further upward as it extends further out in the vehicle's width direction (extends further outward in the vehicle's width direction as it extends further upward). The upper arm pressing surface 62 can be configured to be tilted so that it extends further upward as it extends further out in the width direction of the vehicle.
[0078] As shown in Figure 1, the vertical partition 40A is provided in such a way that it extends in the top-down direction of the seat back along the central portion in the front-rear direction of the chest region C and the abdominal region B of the occupant P. In the vicinity of this vertical partition 40A, as shown in Figure 3, a recessed portion 64 formed by the inward surface in the vehicle width direction of the side airbag 20 which is lowered outwardly in the vehicle width direction. The recessed portion 64 is extensively arranged in the top-down direction of the seat back along the vertical partition 40A. The lowered portion 64 faces the central portion in the front-rear direction (that is, the portion that extends further out in the direction of vehicle width) of the C-chest region and the B-abdominal region.
[0079] However, the upper partition 40B is provided so as to extend obliquely upward in the forward direction of the seat back 14 from the upper end of the vertical partition 40A. Specifically, the upper partition 40B is tilted further upward as it extends towards the forward direction of the seat back 14, in relation to the front-rear direction of the seat back 14, that is, a direction (towards the along a short stroke and long stroke line X in Figure 2) vertical to the top-down direction (direction along a short stroke line and long stroke Y in Figure 2) of the seat back 14 in a side view of the seat. The top-down direction of the seat back 14 denotes a direction that extends through a center in the front-rear direction of an upper end of the seat back frame 15 and an axial center of a reclining rod 65 in the side view the seat. An inclination angle θ of the upper partition 40B with respect to the front-rear direction of the seat back 14 is preferably defined as being within a range of 30 ° to 60 ° and, most preferably, within a range of 40 ° to 50 °.
[0080] If the inflation and deployment status of the side airbag 20 is seen from the vehicle's wide direction, the upper partition 40B is defined as being located near a center between the center of the S shoulder region (an axial center of a screw 66 disposed in the shoulder region S of the mannequin P in this document) and a central portion in the longitudinal direction of the upper arm region A (a position of a center of gravity AG of the upper arm region A or a position in the vicinity of the center of gravity AG) of the occupant P. Providing the upper partition 40B, the front extension portion 26A divided from the front bag section 24 is formed above the rear bag section 26. The front extension portion 26A inflates and unfolds upwards from the front bag section 24 so as to restrict the shoulder region S of the occupant P. In the vicinity of the upper partition 40B, as shown in Figure 4, the surface inwards in the width direction of the ve The side airbag module 20 is lowered outward in the width direction of the vehicle, thereby forming a lowered portion 68. The lowered portion 68 extends obliquely upward in the forward direction of the seat backrest 14 along the upper partition 40B.
[0081] In the side airbag device configured above 10, as mentioned previously, the side airbag 20 is folded and placed in a modularized state together with the inflator 22 and others and is disposed within the side section of the door side 14A. At the time of the side airbag 20, the side airbag 20 is previously placed in a flat developed state as shown in Figure 5 and, subsequently, the side airbag 20 is folded using a predetermined folding method (such as roll folding or bellows folding). ). In Figure 5, illustrations of the inflator 22 and the rectifying cloth 42 are omitted from the drawing.
[0082] In the present document, in this modality, in the flat developed state of the side airbag 20 as shown in Figure 5, that is, if the side airbag 20 is developed in a flat state, the front-rear partition 40 (the vertical partition 40A and the upper partition 40B) are folded in two so as to be projected towards the rear bag section 26 along a folded portion thereof located in the central portion in the width direction of the vehicle. In the state, the dimensions of each side airbag component 20 are thus defined so as not to cause any redundancy in any of the front-rear partition 40, the base fabrics 28, 30 of the rear bag section 26 and the cloth. voltage 56.
[0083] Specifically, in the present embodiment, in the flat sectional view as shown in Figure 3, if a width dimension of the vertical partition 40A is defined as 2a, a linear dimension of the tension cloth 56 along the front-rear direction of the airbag lateral 20 is defined as b and a dimension obtained by subtracting 2a above a circumferential length of the rear bag section 26 is defined as 2c, it is configured that a relationship of a + b + d = c is satisfied. Operation and Effects
[0084] In the following, the operation and effects of the first modality will be explained.
[0085] In the side airbag device 10 configured above, when the side impact ECU 52 detects a side impact based on the signal from the side impact sensor 54, the inflator 22 is actuated by the side impact ECU 52. The gas injected at from the inflator gas injection port 22, it is then supplied to the front bag section 24 and the rear bag section 26 of the side airbag 20 in order to cause the side airbag 20 to inflate and deploy. Therefore, the front part of the chest C region, the abdominal region B and the lumbar region L of the occupant P is restricted by the front bag section 24, and the rear part of the chest region C, the abdominal region B and the lumbar region. Occupant L is restricted by the rear bag section 26. In this case, it is possible to bring the rear bag section 26 equipped with the inflator 22 inside it to inflate and unfold previously to a higher pressure than the front bag section 24.
[0086] In the present document, in order to improve the initial occupant containment performance of the side airbag 20, it is effective to perform the following. Specifically, the front-rear partition 40 arranged between the front bag section 24 and the rear bag section 26 is placed facing the central portion in the front-rear direction (the portion that expands further out in the vehicle width direction) on the lateral surface of the chest C region and the abdominal region B. Thus, the load to be applied on the front of the chest C region and the abdominal region B is reduced. However, the inflation width in the vehicle width direction of the rear bag section 26 is increased, thereby restricting the rear of the chest region C and abdominal region B (part on the rear side) that has a load resistance. relatively higher at an early stage.
[0087] In this regard, in the present embodiment, when the side airbag 20 inflates and deploys, the tension cloth 56 disposed within the rear bag section 26 is stretched so as to restrict inflation of the rear bag section 26 in the forward direction. rear of the vehicle. Therefore, the front-rear partition 40 is placed facing the central portion in the front-rear direction of the lateral surface of the chest region C and the abdominal region B of the occupant P and, at the same time, the inflation width in the width direction. of the vehicle from the rear bag section 26 becomes enlarged. As a result, it is possible to reduce the load to be applied to the front of the C chest region and the B abdominal region and also to bring the rear bag section 26 into contact with the rear of the C chest region and region. abdominal B at an early stage, thus improving the initial occupant containment performance of the side airbag 20.
[0088] Specifically, by restricting the rear part of the chest region C and abdominal region B which has a relatively high load resistance by the rear bag section 26 at an early stage, it is possible to reduce the load inserted from the section of front bag 24 at the front of the chest region C and the abdominal region B which has a relatively low load resistance. In this way, the body (upper body) of the occupant P is appropriately restricted in accordance with the difference in load resistance, thus improving the initial occupant containment performance of the side airbag 20. Additionally, this can only be dealt with with a slight change to establish the tension cloth 56 within the rear bag section 26; therefore, it is possible to achieve a simple configuration.
[0089] A side airbag 200 (the first comparative example) as shown in Figure 6 (A) does not include any tension cloth 56 of the present modality. Therefore, if the inflation width in the vehicle width direction of the rear bag section 26 is increased from W to W ', the inflation width in the front-rear vehicle direction of the rear bag section 26 is increased from L to L '; therefore, the position in the front-rear direction of the vehicle of the front-rear partition 40 is significantly changed. In order to prevent this, the flexibility of defining the inflation width in the vehicle width direction of the rear bag section 26 is reduced. In contrast, in the present embodiment, as shown in Figure 6 (B), the inflation width in the vehicle width direction of the rear bag section 26 can be increased from W to W 'without significantly changing the position in the front-rear direction. of the vehicle from the front-rear partition 40. As a result, it is possible to effectively improve the occupant containment performance of the side airbag 10. It should be noted that, in Figure 6 (A) and Figure 6 (B), a reference numeral R denotes the width dimension of the front-rear partition 40.
[0090] In the present modality, in the flat developed state of the side airbag 20, the front-rear partition 40 is folded in two in order to be projected towards the rear bag section 26. Thus, it is possible to define the dimensions of each component side airbag 20 so as not to cause any redundancy (arching) in any of the base fabrics 28, 30 of the rear bag section 26 in the flat become bulky.
[0091] Specifically, as a side airbag 300 (the second comparative example) as shown in Figure 7, in the folding configuration of the front-rear partition 40 in two in order to project towards the front bag section 24, it is impossible achieve an effect of increasing the inflation width in the vehicle width direction of the rear bag section 26 unless the dimensions of each side airbag component 300 are thus defined to cause redundancy 302 in the base fabrics 28, 30 of the section rear bag 26. Consequently, the increase in the volume of the side airbag at the time of folding becomes a problem and it is difficult to ensure quality and mass productivity; but, in the present modality, it is possible to solve these problems. Additionally, in the present embodiment, in the previously developed flat state, the dimensions of each side airbag component 20 are thus defined so as not to cause any redundancy in any of the front-rear partition 40, the base fabrics 28, 30 of the rear bag section 26 and the tension cloth 56. It is therefore possible to further contribute to the effect of compactly folding the side airbag 20.
[0092] At the time of production of the side airbag device for a vehicle, a dedicated side airbag is defined for each vehicle in accordance with a gap between the occupant and the side section of the interior vehicle, amount of cut between the occupant and a pillar B and the influence of the occupant in an inappropriate position (out of position), etc. In this respect, according to the present modality, in the configuration of supplying the tension cloth 56 within the rear bag section 26, the definition of changing the dimension of the tension cloth 56 can be made for each vehicle, which makes it extremely easier to with each vehicle. In order to ensure an installation space in the vehicle seat, it is necessary to suppress the volume of the side airbag when it is folded to the minimum extent, but in the present mode, through the configuration mentioned above, it is possible to satisfy this requirement.
[0093] Additionally, in the present embodiment, the front end of the tension cloth 56 is connected to the central portion in the width direction of the front-rear partition 40; therefore, when the tension cloth 56 is stretched, the central portion in the width direction of the front-rear partition 40 is pulled towards the rear end of the rear bag section 26. Consequently, it is possible to bring the rear bag section 26 to inflate in the wide direction of the vehicle at equilibrium.
[0094] In the present embodiment, the front extension portion 26A to restrict the shoulder region S of occupant P is arranged above the rear bag section 26. The front extension portion 26A inflates and unfolds at an early stage, thereby restricting , the S shoulder region of occupant P at an early stage. In addition, the front extension portion 26A is divided from the front bag section 24 by the upper partition 40B which extends obliquely upward in the forward direction of the seat back 14 from the upper end of the vertical partition 40A and inflates and unfolds upward of the front bag section 24. Specifically, the upper partition 40B that extends obliquely upward in the forward direction is established in relation to the front-rear direction of the seat back 14 so that the upper part of the rear bag section 26 ( front extension portion 26A) extends upwards from the front bag section 24 so as to restrict the S shoulder region of the occupant P. By establishing the upper partition 40B in this way, it is possible to suppress the increase in the volume of the bag section rear 26 as well as placing the upper part of the rear bag section 26 (front extension portion 26A) facing the shoulder region S of the occupant P in a preferential manner. As a result, the back of the chest region C, the abdominal region B and the lumbar region L as well as the shoulder region S can be effectively restricted; thus, it is possible to improve the containment performance of the occupant P by the side airbag 20.
[0095] Additionally, as shown in Figure 4, the inward surface in the vehicle width direction of the front bag section 24 in an inflated and unfolded state is curved so that an upper portion from the center in the top to bottom direction it extends further up as it extends further out in the width direction of the vehicle (see upper arm pressing surface 62 as shown in Figure 4). Consequently, the side airbag 20 and the occupant P come relatively close to each other due to the impact of the side impact, so that the upper arm pressing surface 62 comes in sliding contact with the upper arm region A of the occupant P, thus generating a force F to push up the upper arm region A. As a result, the upper arm region A is pushed upwards from the front bag section 24 and is constrained by the front extension portion 26A. Therefore, it is possible to suppress the intervention of the upper arm region between the chest region C of the occupant P and the side airbag 20, thus reducing the load on the chest region C.
[0096] In the present modality, if the state of inflation and deployment of the side airbag 20 is seen in the direction of vehicle width, the upper partition 40B is located in the vicinity of the center between the center of the S shoulder region and the central portion in the longitudinal direction of the upper arm region A of the occupant P (in the vicinity of the center of gravity AG of the upper arm region A). Therefore, in comparison with the case of establishing the upper partition 40B in the vicinity of the center of gravity AG of the upper arm region A, it is more preferably possible to withstand the force of pushing up F in relation to the upper arm region A through the front bag section 24 in the vicinity of the AG center of gravity of the upper arm region A. Thus, it is possible to effectively push up the upper arm region A.
[0097] Specifically, if the upper partition 40B is arranged along line X of Figure 2, the upper partition 40B extends through the vicinity of the center of gravity AG of the upper arm region A. In the vicinity of the upper partition 40B, as shown in Figure 4, the inward surface in the vehicle width direction of the side airbag 20 is lowered outwardly in the vehicle width direction to form the recess (valley) 68 and thus the lowered portion 68 comes into contact with the vicinity of the AG center of gravity in the upper arm region A. Since the recess portion 68 is formed at the upper end portion (upper end) of the upper arm pressing surface 62, the vicinity of the AG center of gravity in the region upper arm A have a shorter distance and shorter time to come in sliding contact with the upper arm pressing surface 62, so that the upward pushing force F cannot be sufficiently actuated in the vicinity of the center of gravity AG of the upper arm region A. In contrast, in the present embodiment, when the upper arm region A is about to enter sliding contact with the upper arm pressing surface 62, the center of gravity AG is sufficiently spaced down from the recessed portion 68 (upper partition 40B) and thus it is possible to effectively actuate the pushing force F of the upper arm pressing surface 62 into the vicinity of the center of gravity AG of the region of upper arm A. As a result, it is possible to effectively push up the upper arm region A.
[0098] Additionally, the front extension portion 26A extends laterally from the S shoulder region of the occupant P to the forward direction of the vehicle so that it is located above the front bag section 24. Therefore, for example, even if the shape of the side impact is a so-called oblique side impact, and even if the occupant P experiences an inert movement in the obliquely forward direction of the vehicle, it is possible to prevent the occupant S shoulder region from being outside the front extension portion 26A. Therefore, regardless of the shape of the side impact, it is preferably possible to restrict the S shoulder region of the occupant P by the side airbag 20, thus maintaining the restriction of the S shoulder region until the last half of the impact.
[0099] In the present modality, in Figure 2, if the side airbag 20 is cut along a line that extends through the center (screw 66) of the shoulder region S of the occupant P and the center of gravity AG of the region of upper arm A, the lowered portion 68 is formed between the center of the shoulder region S and the center of gravity AG of the upper arm region A. The lowered portion 68 extends obliquely upward in the forward direction of the seat back 14 to the along the upper partition 40B and thus at the front end portion of the front extension portion 26A, a curved surface is formed which is curved further out in the width direction of the vehicle as it extends more obliquely downward in the direction to front of the seat back 14. Therefore, when the side inflation and deployment airbag 20 and occupant P get relatively closer to each other due to the impact of the side impact, together with the push-up effect described the above in relation to the upper arm region A, the shoulder region S of the occupant P located outward in the width direction of the vehicle moves towards the upper partition 40B (in the forward direction of the vehicle) along the curved surface formed at the front end portion of the front extension portion 26A. As a result, the upper body of the occupant P is rotated around a substantially vertical axis in a direction where the shoulder region S located outward in the width of the vehicle moves in the forward direction of the vehicle, so that the back of occupant P is towards the side of the side airbag 20. Thus, the rear side that has a relatively high load resistance can be effectively restrained by the side airbag 20. The chest region C is shifted (turned) in a direction away from the side airbag 20, thus further reducing the load in the chest C region. Additionally, the shoulder region S located outward in the vehicle's wide direction is moved in the forward direction of the vehicle to be fitted in the lower portion 68 and, thus, the shoulder region S becomes difficult to be outside the front extension portion 26A which is a shoulder restraint portion; therefore, it is also possible to maintain, preferably, the restriction of the S shoulder region even at the moment of the oblique impact.
[00100] In the present mode, if the state of inflation and deployment of the side airbag 20 is seen in the width direction of the vehicle, the vertical partition 40A is thus defined so as to be extensively arranged from a position that overlaps a point of HP hip toward the center of the S shoulder region to the lower portion of the U axilla region of the occupant P. Therefore, the lateral surface of the chest region C and the abdominal region B of the occupant P can be restricted by the front bag section 24 and the rear bag section 26 so as to be covered along the curved surface of the front and rear thereof. Consequently, it is possible to stabilize the positional relationship in the front-rear direction of the vehicle between the chest region C and the abdominal region B and the side airbag 20.
[00101] Additionally, in the present embodiment, the intermediate portion in the front-rear direction of the lateral surface of the C thorax region (that is, the portion that expands further out in the width of the vehicle) is fitted in the lowered portion 64 formed in the vicinity of the vertical partition 40A in the state of inflation and deployment of the side airbag 20. Therefore, it is possible to reduce the load to be applied in the region of the C thorax (ribs or similar). The upper arm region A pushed upward by the sliding contact with the front bag section 24 is engaged in the recessed portion 68 formed in the vicinity of the upper partition 40B. Consequently, it is possible to preferably restrict the upper arm region A in the position where the upper arm region A is pushed upwards.
[00102] In the present modality, as the vertical partition 40A and the upper partition 40B are formed by the base fabrics 28, 30 (front-rear division limit), the inflation width in the vehicle width direction of the section front bag 24 and rear bag section 26 can be increased by a width dimension of the boundary. Consequently, it is preferably possible to ensure an impact-absorbing stroke of the front bag section 24 and the rear bag section 26.
[00103] In the present embodiment, in the vertical partition 40A, the pair of communication ports 58, 60 is formed with the tension cloth 56 arranged between them so as to communicate mutually the interior of the front bag section 24 and the interior of the rear bag section 26. The gas supplied from the inflator 22 disposed within the rear bag section 26 is supplied through the pair of communication ports 58, 60 to the front bag section 24. Thus, despite the configuration of supplying the cloth of tension 56 which extends transversely between the vertical partition 40A and the rear bag section 26, it is possible to supply, preferably, the gas generated from the inflator 22 within the rear bag section 26 to the front bag section 24 .
[00104] Additionally, in the present embodiment, the front-rear partition 40 is formed by the base fabrics 28, 30 of the rear bag section 26. Therefore, compared to the case of configuring the front-rear partition 40 by a material from a body different from the base fabrics 28, 30, 32, 34 of the front bag section 24 and the rear bag section 26, it is possible to simplify the configuration of the side airbag 20.
[00105] In the present modality, since the gas injected from the inflator 22 is supplied from the upper and lower openings of the grinding cloth 42 to the rear bag section 26, it is possible to take the upper portion and the lower portion of the section rear bag 26 to inflate and unfold at an early stage with a high pressure. As a result, it is possible to improve the initial containment performance of the S shoulder and lower back L of the occupant who has a relatively high load resistance.
[00106] In the first mode above, if the upper partition 40B is configured by a seam (sewn portion), it is possible to enlarge the curve of the upper arm pressing surface 62; therefore, it is possible to increase the push-up force F acting in the upper arm region A. This feature is the same in the case of configuring the upper partition 40B by the limit that has a smaller width than that of the vertical partition 40A.
[00107] In the first embodiment above, it is configured that the pair of communication ports 58, 60 are formed in the vertical partition 40A and no communication port is formed in the upper partition 40B, but the present invention is not limited to this. Specifically, it can be configured that each of the vertical partition 40A and the upper partition 40B are provided with one or multiple communication ports.
[00108] In the first embodiment above, it can be configured that a ventilation hole is formed in at least one of the front bag section 24 and the rear bag section 26 and the gas supplied to at least one of the sections is exhausted to the side airbag 20 through the ventilation hole. Therefore, it is possible to prevent the rest of the crash from being caused by at least one of them.
[00109] In the first embodiment above, it is configured that the tension cloth 56, which is a stretch member, is formed by a body different from the base fabrics 28, 30, 32, 34, but the present invention is not limited to that. Specifically, it can be configured that all or part of the stretchable member is integrally formed with the base fabrics of the front bag section or the rear bag section, that is, the whole or part of the stretchable member is formed from part of the fabrics of base of the front bag section or the rear bag section.
[00110] Accordingly, other embodiments of the present invention will be described. The same reference numerals are used for configurations and operations that are basically the same as those of the first modality mentioned above and their description will be omitted. <Second modality>
[00111] In Figure 8, a state of inflation and deployment of a side airbag 70 which is a component of a side airbag device for a vehicle according to a second embodiment of the present invention is shown in a sectional view corresponding to Figure 3. In the second embodiment, the rear edge of the tension cloth 56 is sewn to the grinding cloth 42 in the T5 seam and a stretch member 72 is formed by the tension cloth 56 and the grinding cloth 42. This means that, in the second embodiment , part of the stretchable member 72 is formed by the grinding cloth 42 (rectifying member).
[00112] In the second embodiment, in a flat developed state of the side airbag 70, the front-rear partition 40 is folded in two so that it is projected towards the rear bag section 26 along a folded portion thereof located in the central portion in the width direction of the vehicle. In the state, the dimensions of each side airbag component 70 are thus defined so as not to cause any redundancy in any of the front-rear partition 40, the base fabrics 28, 30 of the rear bag section 26 and the stretch member 72. Specifically, it is configured that, if a vertical dimension of the vertical partition 40A is defined as 2a, a linear dimension of the tension cloth 56 along the front-rear direction of the side airbag 20 is defined as b, a circumferential length of the grinding cloth 42 is defined as 2d and a dimension obtained subtracting 2a above the circumferential length of the rear bag section 26 is defined as 2c, a relationship of a + b + d = c is satisfied.
[00113] Consequently, in the second modality, the same operational effect can basically be achieved as this of the first modality mentioned above. In addition, part of the stretchable member 72 is commonly used as the rectifying member, thus simplifying the configuration of the side airbag 70. <Third modality>
[00114] In Figure 9, a state of inflation and deployment of a side airbag 80 that is a component of a side airbag device for a vehicle according to a third embodiment of the present invention is shown in a sectional view corresponding to Figure 3. In Figure 10, the inflation and deployment status of side airbag 80 is shown in a side view corresponding to Figure 2. In the third embodiment, the tension cloth 56 in the first embodiment is omitted, and an entire stretch member 82 is formed by the rectifying cloth 42 (rectifying member). In the grinding cloth 42 (stretching member 82), the seam T5 is omitted, and the front end of the base fabric 46 extending to the vertical partition 40A is sewn to the central portion in the width direction of the vertical partition 40A in the seam T1 .
[00115] In the third embodiment, in the flat developed state of the side airbag 80, the front-rear partition 40 is folded in two so that it is projected towards the rear bag section 26 along a folded portion thereof located in the portion center in the width direction of the vehicle. In the state, the dimensions of each side airbag component 80 are thus defined so as not to cause any redundancy in any of the front-rear partition 40, the base fabrics 28, 30 of the rear bag section 26 and the stretch member 82. Specifically, it is configured that if the width dimension of the vertical partition 40A is defined as 2a, a circumferential length of the stretchable member 82 (grinding cloth 42) is defined as 2d and a dimension obtained subtracting 2a above the circumferential length of the rear bag section 26 is defined as 2c, a ratio of a + d = c is satisfied.
[00116] Consequently, in the third modality, the same operational effect can basically be achieved as this of the first modality mentioned above. In addition, the entire stretch member 82 is commonly used as the grinding cloth (rectifying member), thus simplifying a side airbag configuration 80. <Fourth Mode>
[00117] In Figure 11, a state of inflation and deployment of a side airbag 90 that is a component of a side airbag device for a vehicle according to a fourth embodiment of the present invention is shown in a side view corresponding to the Figure 2. In Figure 12, the inflation and deployment status of the side airbag 90 is shown in a sectional view corresponding to Figure 3. The side airbag 90 includes a lower bag section 94 partitioned from the front bag section 24 and the rear bag section 26 by a top-down partition 92. An interior of the lower bag section 94 is defined as a lower chamber 95 divided from the front chamber 36 and the rear chamber 38.
[00118] The bottom bag section 94 is formed by sewing a base fabric 96 and a base fabric 98 overlapping with the wrong side of the base fabric 96 (wrong side in a vertical direction to a sheet of paper in Figure 11 , as shown in Figure 11. The base fabrics 96, 98 are sewn on the front edges, lower edges and rear edges of them along the outer peripheral seam T2, between the upper edges of the base fabrics 96, 98, the lower ends the front bag section 24 and the rear bag section 26 are inserted, and the lower bag section 94 is sewn to the front bag section 24 and the rear bag section 26 in a T6 seam and a seam not shown. lower sections of the front bag section 24 and the rear bag section 26 are sewn on a T7 seam, and the top-down partition 92 is formed by the lower ends of the front bag section 24 and the rear bag section 26.
[00119] At the rear end of the top-down partition 92, the T7 seam is omitted, and a check valve 100 configured by the base fabrics 28, 30 of the rear bag section 26 is provided. The check valve 100 protrudes towards the lower bag section 94 in order to communicate the interior of the rear bag section 26 and the interior of the lower bag section 94 with each other via the check valve 100. A lower end of a lumbar rectification cloth 102 (external rectifying member) supplied inside the rear bag section 26 is inserted into the check valve 100. The lumbar rectifying cloth 102 has basically the same configuration as this of the rectifying cloth 42 of the second modality and is connected to the rear end of the cloth of tension 56 in the T5 seam. Specifically, in the fourth embodiment, similarly to the second embodiment, a stretchable member 104 is configured by the lumbar grinding cloth 102 and the tension cloth 56.
[00120] Additionally, within the rear bag section 26, the grinding cloth 42 (internal rectifying member) is provided, which is the same as the grinding cloth 42 in the first mode. The lower portion of the rectification cloth 42 is inserted from an upper end opening of the lumbar rectification cloth 102 into the lumbar rectification cloth 102. The inflator 22 is housed within the rectification cloth 42, and the studs 48 of the inflator 22 extend through the grinding cloth 42, the lumbar grinding cloth 102, the base fabric 28 and the side frame 15A and are screwed with the nuts 50.
[00121] In the fourth embodiment, in a flat developed state of the side airbag 90, the front-rear partition 40 is folded in two so that it is projected towards the rear bag section 26 along a folding portion of the same located in the central portion in the wide direction. In the state, the dimensions of each side airbag component 90 are thus defined so as not to cause any redundancy in any of the front-rear partition 40, the base fabrics 28, 30 of the rear bag section 26 and the stretch member 104. Specifically, it is configured that, if a vertical dimension of the vertical partition 40A is defined as 2a, a linear dimension of the tension cloth 56 along the front-rear direction of the side airbag 20 is defined as b, a circumferential length of the grinding cloth 42 is defined as 2d and a dimension obtained subtracting 2a above the circumferential length of the rear bag section 26 is defined as 2c, a relationship of a + b + d = c is satisfied.
[00122] Consequently, in the fourth modality, the same operational effect can basically be achieved as this of the second modality mentioned above. Additionally, in the fourth mode, when the inflator 22 is activated, the gas for inflation and deployment is guided to the lower bag section 94 by the lumbar rectification cloth 102 which is part of the stretch member 104, thus simplifying the airbag configuration. side 90 including lower bag section 94.
[00123] Furthermore, in the fourth embodiment, the gas injected from the inflator 22 is rectified by the rectification cloth 42 and the lumbar rectification cloth 102 and is then supplied to the rear bag section 26 and the lower bag section 94 Therefore, the dimensions and others of the grinding cloth 42 and the lumbar grinding cloth 102 are appropriately changed, thereby promptly changing a gas distribution ratio for the rear bag section 26 and the lower bag section 94. Additionally , the grinding cloth 42 and the lumbar grinding cloth 102 are both formed of cloth; therefore, for example, compared to the case of using a diffuser made of metal, it is possible to fold the side airbag 90 compactly.
[00124] In the fourth modality, since the lumbar rectification cloth 102 is connected to the vertical partition 40A through the tension cloth 56, it is possible to stably retain the lumbar rectification cloth 102 with tension of the tension cloth 56 at the time of inflation and deployment of the side airbag 90. In addition, in the fourth embodiment, if the internal pressure of the lower bag section 94 becomes increased to no less than a predetermined value, the check valve 100 is pressed and crushed, thus restricting (including the case of shutting down completely) the gas flow from the interior of the lower bag section 94 to the rear bag section 26. Therefore, it is possible to maintain the internal pressure of the lower bag section 94 at a high pressure for a long time; therefore, it is possible to effectively restrict the lumbar region L which has a relatively high load resistance on the body of the occupant P by the lower bag section 94. Additionally, the check valve 100 is configured using the base fabrics 28, 30 of the rear bag section 26; therefore, it is possible to simplify the configuration of the side airbag 20 compared to the case of configuring the check valve 100 with the use of a material of a body other than the base fabrics 28, 30 of the rear bag section 26. <Fifth Mode>
[00125] In Figure 13, a state of inflation and deployment of a side airbag 110 that is a component of a side airbag device for a vehicle according to a fifth embodiment of the present invention is shown in a sectional view corresponding to Figure 3. In the fifth embodiment, a configuration of a stretchable member 112 is different from that of the first embodiment. In the stretchable member 112, a pair of pieces of right and left cloth 114, 116 are sewn to the front end of the tension cloth 56 in a T8 seam, and the front end of the stretchable member 112 is branched in two if viewed from the top direction. down from the side airbag 110. The branched front ends of the stretch member 112 are sewn to the vertical partition 40A at the seams T9, T10. In the fifth embodiment, in the vertical partition 40A, one or multiple communication ports 118 are formed which communicate the interior of the front bag section 24 and the interior of the rear bag section 26 with each other between the two branched ends of the stretchable member 112. The illustrations of the inflator 22 and the rectification cloth 42 are omitted in Figure 13.
[00126] In the fifth embodiment, in a flat developed state of the side airbag 110, the front-rear partition 40 is folded in two so that it is projected towards the rear bag section 26 along a folded portion thereof located in the central portion in the width direction of the vehicle. In the state, the dimensions of each side airbag component 110 are thus defined so as not to cause any redundancy in any of the front-rear partition 40, the base fabrics 28, 30 of the rear bag section 26 and the stretch member 112. Specifically, it is configured that, if a linear dimension of the tension cloth 56 is defined as b, a linear dimension of the tension cloth 56 for the vertical partition 40A on each piece of cloth 114, 116 is defined as e, a dimension linear portion of the vertical partition 40A located outwardly in the width direction of each piece of cloth 114, 116 is defined as f and a dimension obtained by subtracting the width dimension of the vertical partition 40A from the circumferential length of the rear bag section 26 is defined as 2c, a relationship of b + and + f = c is satisfied.
[00127] Consequently, in the fifth modality, the same operational effect can basically be achieved as this of the first modality mentioned above. In addition, the front end of the stretchable member 112 connected to the vertical partition 40A is branched in two when viewed in the top-down direction of the side airbag 110 and, thus, it is possible to prevent a pulling force inserted in the vertical partition 40A from being concentrated in a single position of the vertical partition 40A at the time of tensioning of the stretching member 112. Consequently, it is possible to suppress unprepared flexion of the vertical partition 40A at the time of tensioning of the stretching member 112 (that is, at the time of inflation and deployment of the side airbag 110). In addition, in the fifth embodiment, since the aforementioned communication ports 118 are formed in the vertical partition 40A, even in the configuration of providing the stretchable member 112 of which the front end is branched in two transversely between the vertical partition 40A and the rear end of the rear bag section 26, the gas generated from the inflator 22 within the rear bag section 26 can be supplied to the central portion in the wide direction in the front bag section 24. Consequently, it is possible to stabilize the unfolding behavior side airbag 110.
[00128] In each embodiment, it is configured that the rear bag section 26 includes the front extension portion 26A, but the present invention is not limited to that, and it can be configured that the front extension portion 26A is omitted, i.e. , the portion corresponding to the front extension portion 26A is formed by the front bag section 24.
[00129] In each modality, the case in which the front-rear partition 40 is configured by the base fabrics 28, 30 of the rear bag section 26 (front portion of the rear bag section 26) has been explained, but the present invention is not limited to the same. Specifically, as a variation as shown in Figure 14, the front-rear partition 40 can also be configured by the base fabrics 32, 34 of the front bag section 24 (rear portion of the front bag section 24).
[00130] Additionally, the present invention can be changed and executed without departing from the scope of the invention. In addition, it is unnecessary to mention that the scope of the rights of the present invention is not limited to each previously mentioned modality. [00131] The description of the Patent Application in JP 2013-139720 is incorporated in this document in its entirety for reference. All publications, patent applications and technical standards described in this specification are incorporated in this document by reference to the same extent as if each publication, patent application or individual technical standard had been specifically and individually indicated as being incorporated in title. of reference.

权利要求:
Claims (14)
[0001]
1. Lateral airbag device for a vehicle, characterized by the fact that it comprises: a gas generator (22) supplied to a vehicle seat (12), the gas generator (22), when activated, generates the gas for inflation and deployment of the side airbag; and a side airbag divided by a front-rear partition (40) in a leaf shape in a front bag section (24) and a rear bag section (26), the side airbag housed in a folded state in a side section from a seat back (14) of the vehicle seat (12), the side airbag suitable for inflating and deploying towards a front direction of the vehicle from the side section supplying the gas for inflation and deployment in each of the sections bag, in which in a flat developed state of the side airbag, the front-rear partition (40) is folded in two in a way to project towards the rear bag section (26) along a folded portion thereof located in a central portion in a wide direction of the front-rear partition, and a stretchable member (56) is arranged extensively and transversely to the side airbag between the front-rear partition (40) and a rear end of the bag section rear (26) where, in a st With inflation and the deployment of the side airbag, the stretch member (56) is stretched so as to restrict inflation in a front-rear direction of the vehicle from the rear bag section (26).
[0002]
2. A side airbag device for a vehicle according to claim 1, characterized by the fact that the stretchable member (56) is connected to a central portion in a wide direction of the front-rear partition (40).
[0003]
3. Side airbag device for a vehicle according to claim 1 or 2, characterized by the fact that all or part of the stretchable member (56) is configured by a rectifying member (42) that rectifies the gas for inflation and unfolding.
[0004]
4. Side airbag device for a vehicle according to claim 3, characterized in that the side airbag includes a lower bag section (94) divided by a top-down partition (92) of the front bag section (24) and the rear bag section (26), and the gas for inflation and deployment is guided by the rectifying member (42) that forms the part of the stretchable member (56) for the lower bag section (94).
[0005]
5. Side airbag device for a vehicle according to claim 4, characterized in that the gas from the gas generator (22) disposed within the rear bag section (26) is supplied to the lower bag section (94 ), and the side airbag is provided with a check valve (100) which restricts a flow of gas from an interior of the lower bag section (94) to an interior of the rear bag section (26).
[0006]
A side airbag device for a vehicle according to any one of claims 1 to 5, characterized in that the two upper and lower portions on both sides of the front-rear partition (40) with the stretchable member (56) ) located between them or on each side of the front-rear partition (40), a pair of communication doors (58, 60) is formed that communicate an interior of the front bag section (24) and the interior of the section rear bag (26) with each other, and the gas from the gas generator (22) disposed within the rear bag section (26) is supplied via the pair of communication ports (58, 60) to the front bag section (24).
[0007]
7. Side airbag device for a vehicle according to claim 1, characterized in that a front end of the stretch member (56) branched in two seen from the up and down direction of the side airbag is connected to the partition front-rear (40).
[0008]
8. Side airbag device for a vehicle, according to claim 7, characterized by the fact that in the front-rear partition (40), the communication ports (118) that communicate inside the front bag section (24) and the interior of the rear bag section (26) with each other are formed between the branched front ends of the stretch member (56).
[0009]
Lateral airbag device for a vehicle according to any one of claims 1 to 8, characterized in that an upper portion of the front-rear partition (40) is configured to be an upper partition that extends obliquely upwards in a forward direction of the seat back (14) in the inflated and deployed state of the side airbag, and a front extension portion disposed above the rear bag section (26) is divided from the front bag section (24) by the partition higher.
[0010]
10. Side airbag device for a vehicle according to any one of claims 1 to 9, characterized in that the front-rear partition (40) is configured by the base fabrics of the front bag section (24) or the rear bag section (26).
[0011]
Lateral airbag device for a vehicle according to any one of claims 1 to 3, characterized in that it comprises a rectifying member (102) which is formed in a cylindrical shape and is disposed within the rear bag section (26 ) and houses the gas generator (22) inside it, where the gas for inflation and deployment is supplied from the upper and lower openings of the rectifying member (102) to the rear back section.
[0012]
12. Side airbag device for a vehicle according to any one of claims 1 to 11, characterized in that in the flat developed state, the dimensions of each component of the side airbag are thus defined so as not to cause any redundancy in any of the front-rear partitions (40), the base fabrics of the rear bag section (26) and the stretch member (56).
[0013]
13. Side airbag device for a vehicle, according to claim 5, characterized by the fact that the check valve (100) is configured by the base fabrics of the rear bag section (26), and protrudes into the lower bag section (94).
[0014]
Lateral airbag device for a vehicle according to claim 13, characterized in that the rectifying member (42) includes an external rectifying member and an internal rectifying member, each of which is formed in a cylindrical shape that has openings in the upper and lower portions thereof, the outer rectifying member forms part of the stretch member (56), and a lower portion of the outer rectifying member is inserted into the check valve (100), and the inner and outer rectifying member houses the gas generator (22) within it, and a lower portion of the internal rectifying member is inserted into the external rectifying member.

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法律状态:
2020-05-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-12-01| B09A| Decision: intention to grant|

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2021-02-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 06/06/2014, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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JP2013139720A|JP5776733B2|2013-07-03|2013-07-03|Side airbag device for vehicle|

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JP2013-139720|2013-07-03|

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PCT/JP2014/065160|WO2015001912A1|2013-07-03|2014-06-06|Side airbag device for vehicle|

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