vehicle seat

专利摘要:
VEHICLE SEAT AND SEAT SPLASH. The present invention relates to a vehicle seat and a seat backrest in which a seat cover can be easily anchored with a resin spring. In a seat backrest (16), the cleats (22C) attached to one side of the cover (20) are engaged with the vertical cleat engagement portions (59) of the seat backrest (16), thus allowing the cover (20) is anchored to a return spring section (38) of the seat backrest (16). Consequently, an operation of anchoring the cover (20) to the return spring section (38) can be made easier in conventional anchoring structures that employ, for example, bend rings. In addition, since only pairs of openings (58) are formed to the return spring section (38) of the seat backrest (16) in order to provide the vertical clip hitch portions (59), it is possible to avoid any detriment to the moldability of the return spring section (38).
公开号:BR112013027943B1
申请号:R112013027943-5
申请日:2011-05-02
公开日:2021-01-12
发明作者:Hisaya Mori；Shinji Awata；Hideki Kobayashi
申请人:Toyota Jidosha Kabushiki Kaisha；
IPC主号:

专利说明:

[0001] [001] The present invention relates to a vehicle seat and a seat backrest provided with a resin spring. BACKGROUND OF THE TECHNIQUE
[0002] [002] There is a demand for weight reduction in vehicle seats. Patent Document 1 below describes a spring that extends between a pair of left and right side frames provided to a seat back frame. The spring is made of resin from the perspective of reducing the weight of the vehicle seat.
[0003] [003] Patent Document 1: Japanese Patent Application Open for Public Inspection (JP-A) No. 2004-138156 DESCRIPTION OF THE INVENTION TECHNICAL PROBLEM
[0004] [004] When metal springs are provided to a vehicle seat, generally a cushion of a cushioning material is supported on the metal springs and a seat cover that covers a front face of the cushion is anchored to the metal rings through , for example, curvature rings. One can also consider employing a structure to anchor a seat cover to a resin spring, as described above, however, conventional anchoring structures that use, for example, curvature rings involve a complicated anchoring operation.
[0005] [005] In consideration of the above circumstances, an objective of the present invention is to obtain a vehicle seat and a seat backrest in which a seat cover can be easily anchored to a resin spring. SOLUTION TO THE PROBLEM
[0006] [006] A vehicle seat according to claim 1 of the invention includes: a resin spring that is made of resin, supported on both end sides by a seat frame, and formed by a pair of adjacent openings, by a latch engagement portion configured between the pair of openings; a pad supported on the resin spring; a seat cover that covers a front face of the cushion; and a clip that is attached to the side of the seat cover, which includes a pair of arm portions that are respectively inserted into the pair of openings, with a hook portion formed on a front end side of each between the pair of portions of the arm, with the respective hook portions hooking to the clip engaging portion to anchor the clip to the edge portions of the pair of openings.
[0007] [007] In the vehicle seat according to claim 1, the cushion is supported by the resin spring which, in turn, is supported by the seat frame. The clip is attached to the seat cover that covers the cushion, and the clip is attached to the edge portion of the pair of openings formed on the resin spring. Correspondingly, the seat cover can be easily anchored to the resin spring via the clip. Furthermore, since only the opening is formed with the resin spring in order to anchor the seat cover, any detriment to the moldability of the resin spring can be avoided.
[0008] [008] A vehicle seat according to claim 2 of the invention is the vehicle seat of claim 1, wherein: the resin spring is formed by a pair of openings that are adjacent to each other; the anchoring means are configured by a clip which includes a pair of arm portions which are respectively inserted into the pair of openings, with a hook portion formed on a front end side of each arm portion; and a clamp engagement portion, which each of the respective hook portions engage with, is configured between the pair of openings.
[0009] [009] Furthermore, in this vehicle seat, when the pair of arm portions provided to the clip are respectively inserted into the pair of openings formed on the resin spring, the hook portions formed on the front end sides of the pair of arm portions become hook to the clip engagement portion formed between the pair of openings. The seat cover to which the clip is attached can, as a result, be easily anchored to the resin spring. In addition, by moving the pair of arm portions apart, the clip, that is, the seat cover, can be removed from the resin spring. Consequently, an operation to remove the clip from the resin spring may become easier than in a configuration where, for example, the arrowhead-shaped anchoring means are inserted into a single opening and anchored to the portions. edge of the opening.
[0010] [0010] A vehicle seat according to claim 3 of the invention is the vehicle seat of claim 1, wherein: the clip is configured so that when the base end sides of the pair of arm portions are brought together, the front end sides of the pair of arm portions pivot around an intermediate portion of the pair of arm portions in order to be spaced apart.
[0011] [0011] In the vehicle seat according to claim 3, during the removal of the clip from the resin spring, it is enough to bring the base end sides closer to the pair of arm portions. Since the front end sides of the pair of arm portions pivot around the intermediate portion of the pair of arm portions in order to separate them, hooking the hook portions to the clip engagement portion of the resin spring can be released. Consequently, an operation to remove the clamp (i.e., the seat cover) from the resin spring can become even easier.
[0012] [0012] A vehicle seat according to claim 4 of the present invention is the vehicle seat of either of claims 1 or 3, wherein: the resin spring is provided with a flexing portion formed by a section profile wavy cross; and the opening is formed in the flexion portion.
[0013] [0013] In the vehicle seat according to claim 4, a contribution to the spring characteristics of the resin spring can be easily made with a simple configuration due to the fact that the resin spring is provided with a flexing portion formed by a wavy cross-section profile. In addition, the spring constant of the resin spring can be easily varied by appropriately varying the setting for the position of the opening formed by the resin spring.
[0014] [0014] A vehicle seat according to claim 5 of the invention is the vehicle seat of any one of claims 1, 3 or 4, wherein: the resin spring is attached to both end portions of the seat frame ; and the opening is formed in one location excluding both the end portions and a central portion of the resin spring.
[0015] [0015] In the vehicle seat according to claim 5, both end portions of the resin spring are attached to the seat frame. Consequently, similarly to a support beam that is attached to both ends, the stress is greatest on both end portions and on a central portion of the resin spring when the load is inserted on one side of the central portion of the resin spring. In the present invention, the opening for engaging the clip with the resin spring is formed at a location that excludes both the end portions and the central portion of the resin spring. That is, since the opening is formed in order to prevent the places where the stress is the greatest, the resin spring can be adjusted with a small width while still obtaining the hardness and rigidity of the resin spring. Consequently, it is possible to achieve a reduction in weight and a reduction in costs for the resin spring, and thus for the vehicle seat.
[0016] [0016] A vehicle seat according to claim 6 of the invention is the vehicle seat of any one of claims 1, 3, 4 or 5, wherein: at least loops on the side of the seat cover are respectively anchored to at least at least two of the clamp hitch portions formed on the resin spring, so that at least two clamps have different engaging directions, relative to the clamp hitch portions, with each other, with the seat cover thus positioning the cushion in relation to the resin spring in at least two directions.
[0017] [0017] In the vehicle seat according to claim 6, at least two of the fasteners attached to the side of the seat cover are respectively anchored to at least two of the fastener engagement portions formed by the resin spring. Consequently, an involuntary positional displacement of the cushion in relation to the resin spring can be suppressed since the seat cover positions the cushion in at least two directions in relation to the resin spring. In addition, the engaging directions of at least two of the clamps relative to at least two of the clamping portions adjusted so that they are different from each other. Consequently, for example, by adjusting the dimensions of each of the clip engagement portions greater than the dimensions of each of the clips, the pad can be positioned relative to the resin spring in at least two directions by at least two of the anchoring means, even when each anchoring means is capable of relative movement in a direction orthogonal to the engaging direction with respect to the resin spring. That is, the manufacture of the vehicle seat can be made easier since the cushion can be positioned in relation to the resin spring in at least two directions while any variation in assembly of the cushion in relation to the resin spring is absorbed by a movement relative to the loops.
[0018] [0018] A vehicle seat according to claim 7 of the invention is the vehicle seat of any one of claims 1, 3, 4, 5 or 6, wherein: the seat frame is a seat back frame including a pair of left and right side frames; the resin spring is arranged along a direction of the seat back width between the pair of side frames; the cushion is a seat back cushion that is arranged on a front face side of the resin spring and is provided with a communication portion that places a front face side and a rear face side of the cushion in communication with each other ; the seat cover covers at least the front face side of the seat back cushion; and the clip is inserted through the communication portion and anchored to the edge portion of the opening.
[0019] [0019] In the vehicle seat according to claim 7, the resin spring is arranged along the direction of the seat back width between the pair of left and right side frames provided to the seat back frame. The seat back cushion is arranged on the front face side of the resin spring, and the clip is attached to the seat cover that covers at least the front face side of the seat back cushion. The clip is inserted through the communication portion provided to the seat back cushion and engaged with the edge portion of the opening formed on the resin spring. Consequently, the seat backrest cover can be easily anchored to the resin spring via the clamp.
[0020] [0020] A vehicle seat according to claim 8 of the invention is the vehicle seat of claim 7, wherein: the resin spring is integrally provided with a seat backrest which is made of resin and provided with a portion of backrest arranged on a rear face side of the seatback frame.
[0021] [0021] In the vehicle seat according to claim 8, the backrest portion and the resin spring are integrally provided to the seat backrest which is made of resin, thus allowing a reduction in the number of components and a reduction in assembly processes compared to when a seat back spring is made of metal, consequently allowing for a reduction in weight and a reduction in costs to be achieved. Furthermore, since only the opening is formed with the resin spring in order to anchor the seat cover, any detriment to moldability can be avoided even in a configuration in which the resin spring is integrally formed to the backrest portion.
[0022] A vehicle seat according to claim 9 of the invention is the vehicle seat of claim 8, wherein: several resin springs are provided so that they are separated from each other in a height direction of the seat back , with several resin springs having flexion portions formed by a wavy cross-section in plan view, joining several curved faces along the direction of the seat back width, and several resin springs are adjusted at an angle to allow the removal of a mold in one of the height directions of the seat back.
[0023] [0023] In the vehicle seat according to claim 9, due to the provision of the backrest portion to the seat backrest, it is preferable to adopt a mold removal method in one of the height directions of the seat backrest in order to form integrally several resin springs to the backrest portion using resin molding. In consideration of this point, in the present invention, the respective flexion portions formed on each of the resin springs are adjusted at an angle, allowing the removal of the mold in one of the height directions of the seat back.
[0024] [0024] A vehicle seat according to claim 10 of the invention is the vehicle seat of claim 3, wherein: the intermediate portions of each between the pair of arm portions are provided with projection portions that project in directions that approach each other.
[0025] [0025] In the vehicle seat according to claim 10, when the base end sides of the pair of arm portions provided to the clip are brought together, the projection portions provided to the intermediate portions of the pair of arm portions approach and come into contact with each other. The front end sides of the pair of arm portions hinge around the projection portions and are spaced apart. Consequently, a simple clamp configuration can be achieved.
[0026] [0026] A seat backrest according to claim 11 of the invention includes: a backrest portion which is formed from a resin plate member and which is arranged on a rear face side of a seat back frame ; and a return spring portion that is made from resin and is integral with the backrest portion or integrally provided with the backrest portion, and that includes a resin spring arranged along a direction of seat back width between a pair of left and right side frames provided to the seat-back frame, the resin spring being provided with a flexion portion formed with a wavy cross-section profile, which is formed by an opening in the flexion portion.
[0027] [0027] In the seat backrest according to claim 11, due to the integral supply of the backrest portion and the resin spring to the seat backrest which is made from resin, a reduction in the number of components and in the number of assembly processes compared to when a seat back spring is made of metal, thus allowing for a reduction in weight and a reduction in costs to be obtained. Furthermore, since only the opening is formed with the resin spring in order to anchor a seat cover, any detriment to moldability can be avoided even in a configuration in which the resin spring is integrally formed to the backrest portion.
[0028] [0028] A seat backrest according to claim 12 of the invention is the seat backrest of claim 11, wherein: the resin spring is provided with a flexing portion formed by a wavy cross-section profile; and the opening is formed in the flexion portion.
[0029] [0029] Furthermore, in this seat backrest, it is possible to easily make a contribution to the spring characteristics of the resin spring with a simple configuration due to the fact that the resin spring has a flexion portion formed by a section profile wavy cross. In addition, the spring constant of the resin spring can be easily varied by appropriately varying the setting for the position of the opening formed by the resin spring.
[0030] [0030] A seat backrest according to claim 13 of the invention is the seat backrest of claim 11, wherein: both end portions of the resin spring are fixed to the pair of side frames; and the opening is formed in one location excluding both the end portions and a central portion of the resin spring.
[0031] [0031] In the seat backrest according to claim 13, both end portions of the resin spring are attached to the pair of left and right side frames of the seat back frame. Consequently, similarly to a support beam that is attached to both ends, when a load is inserted to a central side of the resin spring, the stress is greatest on both the end portions and the central portion of the spring. resin. In the present invention, the opening for engaging a clip with the resin spring is formed in one location excluding both the end portions and the central portion of the resin spring. That is, since the opening is formed in order to avoid the places where the stress is the greatest, for example, the spring formed in order to avoid the places where the stress is the greatest, for example, the resin spring can be adjusted to a small width while still obtaining the hardness and rigidity of the resin spring. Consequently, it is possible to achieve a reduction in weight and a reduction in costs for the resin spring, and thus for the seat backrest.
[0032] [0032] A seat backrest according to claim 14 of the invention is the seat backrest of claim 11 or 13, wherein: several resin springs are provided so that they are separated from each other in a height direction of the portion of backrest, with the various resin springs having integral flexion portions formed by a wavy cross section in plan view, joining several curved faces along the width direction of the backrest portion, and the various resin springs are adjusted at an angle to allow the removal of a mold in one of the height directions of the backrest portion.
[0033] [0033] In the seat backrest according to claim 14, due to the supply of the backrest portion, it is preferable to adopt a method of removing mold in one of the height directions of the backrest portion in order to integrally form several resin springs to the backrest portion using resin molding. In view of this point, in the present invention, the respective flexion portions formed at each of the resin springs are adjusted at an angle, allowing the removal of the mold in one of the height directions of the backrest portion. ADVANTAGE EFFECTS OF THE INVENTION
[0034] [0034] As previously described, on the vehicle seat and the seat backrest according to the present invention, a seat cover can be easily anchored to a resin spring. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] [0035] Figure 1 is an exploded perspective view showing a seat back of a vehicle seat according to a first exemplary embodiment of the present invention.
[0036] [0036] Figure 2 is a perspective view illustrating an assembled state from the seat backrest to the seat backrest shown in Figure 1.
[0037] [0037] Figure 3 is an enlarged cross-sectional view (an enlarged cross-sectional view taken along line 3-3 in Figure 2) illustrating an assembled state of the seat back illustrated in Figure 1.
[0038] [0038] Figure 4 is an enlarged vertical cross section that illustrates an assembled state of the seat back shown in Figure 1.
[0039] [0039] Figure 5A is a cross-sectional plan view showing a partial configuration of a return spring portion on the upper side of a seat backrest, Figure 5B is a front view illustrating a partial configuration of the back portion top side return spring, and Figure 5C is a stress distribution diagram that appears in the top side return spring portion.
[0040] [0040] Figure 6 is a cross-sectional plan view showing a portion of Figure 3.
[0041] [0041] Figure 7 is a cross-sectional plan view corresponding to Figure 3, which illustrates a Comparative Example to the first exemplary embodiment of the present invention.
[0042] [0042] Figure 8 is a perspective view illustrating a seat backrest according to a second exemplary embodiment of the present invention.
[0043] [0043] Figure 9 is a cross-sectional plan view showing the seat backrest illustrated in Figure 8.
[0044] [0044] Figure 10 is an enlarged cross-sectional view showing the range indicated by the letter E in Figure 9. BEST MODE FOR CARRYING OUT THE INVENTION FIRST EXAMPLIFYING MODE
[0045] [0045] The following explanation refers to a first example of a vehicle seat according to the present invention, with reference to Figures 1 to 7. It is noted that in the drawings, the arrow FR indicates the frontal direction of the vehicle , the UP arrow indicates the top direction of the vehicle, and the W arrow indicates the width direction of the vehicle, as appropriate. The front-rear direction, the up-down direction, and the width direction (left-right direction) of the vehicle seat according to the present exemplary modality correspond to the front-rear direction, the up-down direction, and to the wide direction (left-right direction) of the vehicle. General configuration
[0046] [0046] Figure 1 is an exploded perspective view illustrating a seat backrest 12 consisting of a backrest of a vehicle seat 10 of the present exemplary embodiment. Note that in Figure 1, each of the elements is represented as seen from slightly different angles. Figure 4 is a vertical cross-section of vehicle seat 10. As shown in Figure 1 and Figure 4, vehicle seat 10 is configured from a seat cushion 11 (see Figure 4) on which an occupant sits. seat, the seat backrest 12 which is recliningly supported on a rear end portion of the seat cushion 11, and a headrest, not shown in the drawings, which is supported on an upper end portion of the seatback 12 so that it is able to move up and down. Note that in each of the drawings, arrow A indicates the front direction of the seat back 12, and arrow B indicates the height direction of the seat back 12, as appropriate. The width direction of the seat back 12 corresponds to the vehicle width direction (seat width direction) W.
[0047] [0047] As shown in Figure 1, the seat backrest 12 includes a seat backrest frame 14 (seat frame) that is made from metal and forms a frame member of the seat backrest 12, a backrest of the spring of integral resin (referred to below simply as "seat backrest") 16 which is mounted to a front face side of the seat backrest frame 14, a seat backrest pad 18 that forms a cushioning member of the seat backrest 12 and which is fixed from the front side of the seat backrest 16 and supported by the seat backrest frame 14, a cover (seat cover) 20 that covers the front face which is the main face of the seat backrest cushion 18, and the vertical direction fixing members 22 and a horizontal direction fixing member 24 for fixing the cover 20 to the seat backrest 16. The following detailed explanation pertains to each configuration element. Configuration of the seatback frame 14
[0048] [0048] As shown in Figures 1 to 4, the seatback frame 14 is configured in a rectangular frame format as seen from the front (ie, as seen from the front of the vehicle). Specifically, the seat-back frame 14 is configured from a pair of left and right side frames 26 arranged one facing the other along the direction of the seat-back width, an inverted U-shaped top frame 28 connecting the upper end portions of the left and right side frames 26, and a lower frame 30 connecting the lower end portions of the left and right side frames 26 along the direction of the seat back width. The seat backrest 12 is manufactured by pressing the four members that include the upper frame 28, however, other frame structures can be adopted. For example, the upper frame alone can be configured from a folded tube member in an inverted U shape, or the upper frame and the pair of left and right side frames can be configured from a single folded tube member in an inverted U shape.
[0049] [0049] The following explanation refers to the cross-sectional structure of the left and right side frames 26. As illustrated in Figures 2 and 3, the side frames 26 are respectively configured by a side wall portion 26A, a front wall portion 26B and a rear wall portion 26C, with an open cross-section profile that is open to the direction of the seat back width inward. The side wall portion 26A is configured to narrow the progressing width from a lower end portion towards an upper end portion. A lower portion of the side wall portion 26A is formed by a pair of upper and lower fixing holes 32, 33 (see Figure 1). The front wall portion 26B extends from a front edge of the side wall portion 26A to the direction of the seat back width in a slight inclination toward the front side, and then the front wall portion 26B extends in the direction of the seat back width inward at a slight inclination towards the rear side along a circular arc face. The rear wall portion 26C extends from a rear edge of the side wall portion 26A to the direction of the seat back width inward. A projecting portion projecting in a circular arc shape towards the front side of the seat back is provided in a central portion of the seat back width direction of the rear wall portion 26C. A front end portion of the rear wall portion 26C is folded so that it is tilted towards the front side of the seat back. The width of the rear wall portion 26C is adjusted sufficiently wider than the width of the front wall portion 26B. A fixing hole 34 (see Figure 1) is provided on one side of the upper portion of the rear wall portion 26C. Configuration of the seat backrest 16
[0050] [0050] The following detailed explanation refers to the configuration of the seat backrest 16 which configures a relevant portion of the vehicle seat 10 of the present exemplary modality. As shown in Figures 1 to 4 (in particular in Figures 1 and 2), the seat backrest 16 includes a backrest portion 36 which is formed from a resin plate member and is arranged on a rear face side of the seat-back frame 14, and a return spring section 38 (resin spring) which is made from resin and integrally provided to the backrest portion 36, which is supported by crossing between the pair of left and side frames right 26, which supports the seat back cushion 18, and which is formed so that it is capable of undergoing bending deformation in a load direction (towards the rear side of the seat back) when the load act towards the rear side of the seat back.
[0051] [0051] The backrest portion 36 is configured including a plate body 40 that is formed slightly smaller than the seat back frame 14, and an anchor portion 42 integrally formed as a U-shaped groove to the locations in a portion outer periphery of the plate body 40. More specifically, the plate body 40 is formed slightly smaller than an internal peripheral edge of an opening portion of the rectangular 14-shaped seat back frame. In a state mounted to the frame of the seat backrest 14, the plate body 40 is arranged between and slightly towards the rear side of the seat backrest of the front end portions (inner end portions) of the rear wall portions 26C of the left and right side frames 26. Consequently , the plate body 40 can be mounted to the seat backrest frame 14 from the front side (see Figure 3). The cross-sectional profile of the anchor portion 42 is configured in an open U shape towards the rear side of the seat back. The anchor portion 42 is used to anchor an outer peripheral portion of the cap 20, however, the anchor portion 42 also has a function of strengthening the plate body 40 and increasing the stiffness of the backrest portion 36.
[0052] [0052] The return spring section 38 is configured from a portion of the lower side return spring 44 integrally formed to one side of the lower portion of the backrest portion 36, and a return spring portion of the upper side 46 integrally formed on one side of the upper portion of the backrest portion 36. The upper side return spring portion 46 is provided independently, in a separate position from the lower side return spring portion 44 at a specific separation distance in the direction height of the seat back. The lower side return spring portion 44 is configured by 3 lower side return spring body portions 48, 49, 51 arranged in three parallel rows along the height direction of the seat back (height direction of the backrest portion) 36), and a pair of side portions of the lower left and right plate 50 (coupling and fixing portions) that respectively coupled together both end portions of the seat back width direction (length direction) of each of the three lower side return spring body portions 48, 49, 51 along the height direction of the seat back, which are coupled to the backrest portion 36 and attached to the side frames 26. Note that the number of portions of lower side return spring body configuring the lower side return spring portions 44 can be adjusted as desired, and varied as appropriate based on a relationship with required padding properties at. Consequently, the configuration may consist of a single portion of the lower side return spring body enlarged in the up-down direction, or the configuration may consist of two, or four or more, return spring body portions bottom side.
[0053] [0053] As shown in Figure 2, the lower side return spring body portions 48, 49, 51 are configured with bending portions 48A, 49A, 51A (general spring portions) on one side of the width direction central seat backrest. As seen in the plan cross-sectional view, the bending portions 48A, 49A, 51A are respectively configured with wavy cross sections providing several curved faces that are joined along the direction of the seat back width (width direction of the seat). backrest portion 36). Bending portions 48A, 49A, 51A stretch when a load acts towards the side of the backrest portion 36 (rear side of the seat back). Consequently, the lower lateral return spring body portions 48, 49, 51 are subjected to flexion deformation (resilient deformation) towards the side of the backrest portion 36 which is the direction of the loading action. The flat portions 48B, 49B, 51B, respectively formed in flat plate formats, are provided at both end portions of the seat back width direction of the respective lower side return spring body portions 48, 49, 51. Both end portions of the seat width direction of the respective flat portions 48B, 49B, 51B are integrally coupled to the pair of side portions of lower left and right plate 50.
[0054] [0054] The two end portions of the seat-back width direction of the bending portions 48A, 51A of each of the upper side and lower tier 48, 51 lower side return spring body portions are formed by sets of vertical opening parts 58 (openings) that are adjacent to each other in the direction of the seat back width. The vertical openings 58 are formed by elongated rounded profiles oriented in the direction of height of the seat back, and a vertical clip hitch portion 59 to anchor the cover 20 is formed between the adjacent pairs of adjacent left-right vertical openings 58. The vertical clip hitch portions 59 extend along the height direction of the seat back.
[0055] [0055] As shown in Figure 3, the backrest portion 36 is arranged in a position separate from the lower side return spring portion 44 at a specific separation distance towards the rear side of the seat back. That is, a specific span 52 is formed between the lower side return spring portion 44 and the backrest portion 36. The lower side return spring body portions 48, 49, 51 are capable of undergoing resilient deformation within span span 52. That is, the backrest portion 36 also functions as a limiting member that limits the deflection of the lower side return spring portion 44 to a specific or lower degree.
[0056] [0056] The side plate portions of the bottom side 50 include inner walls 50A arranged in the direction of the seat back width within the side wall portions 26A of the side frames 26. The outer end portions of the seat back width direction of the lower side return spring body portions 48, 49, 51 are coupled to the inner walls 50A. The bottom plate side portions 50 also include outer walls 50B arranged to the outer parts of the seat back width direction of the side wall portions 26A of the side frames 26. The outer walls 50B are arranged parallel to the inner walls 50A and make contact with the outer faces of the side wall portions 26A. In addition, the bottom plate side portions 50 are provided with front walls 50C which are coupled to the front end portions of the inner walls 50A and the outer walls 50B on a front face side of the front wall portions 26B of the side frames 26, and the rear side walls 50D extending from the rear end portions of the inner walls 50A towards the inner part of the seat back width direction and are coupled to the backrest portion 36.
[0057] [0057] Both seat-back width steering end portions of the three top to bottom rows of the lower side return spring body portions 48, 49, 51 are respectively coupled together by the pair of lower plate side portions left and right 50. That is, although several lower side return spring body portions 48, 49, 51 are provided in the height direction of the seat back, the lower side return spring portion 44 is integrated with the backrest portion 36 by coupling together both seat end width steering end portions of the lower side return spring body portions 48, 49, 51 with the left and right lower plate 50 side portions. Note that a length direction dimension of the respective lower plate side portions 50 is adjusted to include a strip from the upper edge of the lower side return spring body portion upper 48 to the lower edge of the lower row lower side return spring body portion 51.
[0058] [0058] As shown in Figure 1, the outer walls 50B of the lower plate side portions 50 are respectively formed by a pair of upper and lower through holes 61, 63. The through hole on the upper side 61 is arranged at the same height as the portion upper side lower spring return body 48, and the lower side through hole 63 is disposed at the same height as the lower side lower 51 return spring body portion. The upper and lower pair of through holes 61 , 63 is respectively arranged to face the pairs of upper and lower fixing holes 32, 33 formed in the side wall portions 26A of the side frames 26. The side portions of the bottom plate 50 are secured and fixed to the side frames 26 by clamping and anchoring clips 65, 67 (see Figure 2 and Figure 3) that serve as fixing implements that are inserted in the through holes 61, 63 to the fixing holes tion 32, 33 from the outside of the seat back width direction. Note that several other means can be adopted to fix the side portions of the lower plate 50, such as a configuration in which the side portions of the lower plate 50 are fixed to the side frames 26 using fixing implements (fixing elements) such as rivets, screws, or weld pins and nuts, or a configuration in which the bottom portions of the bottom plate 50 are adhered to the side frames 26 using a structural adhesive.
[0059] [0059] The upper side return spring portion 46 has a basic configuration similar to the lower side return spring portion 44, and is configured including a upper side return spring body portion 54 and side plate portions of the upper side 56 (coupling and fixing portions). A bending portion 54A (generic spring portion) formed by a cross-section in view of a corrugated plan in order to stretch and undergo bending deformation (resilient deformation) when a load acts towards the side of the backrest portion 36 (rear side of the seat back) is provided on one side of the center seat back width direction of the upper side return spring body portion 54.
[0060] [0060] The pairs of vertical openings 58, and vertical clip hitch portions 59 similar to the vertical openings 58 and the vertical clip hitch portions 59 formed to the lower side return spring body portions 48, 51 are formed in both the seatback width steering end portions of the flexing portion 54A. That is, a total of 6 sets of vertical opening pairs 58 are formed on the seat backrest 16, forming 6 of the vertical clip engaging portions 59.
[0061] [0061] The sets of horizontal opening pairs 69 (openings) adjacent to each other in the direction of height of the seat back are respectively formed on both the left and right sides of an intermediate direction portion of the seat back width of the seat back. bending 54A. Each of the horizontal openings 69 is formed in an elongated rounded shape oriented in the direction of the seat back width, and a horizontal clip hitch portion 71 for anchoring the cover 20 is formed between the pairs of adjacent horizontal upper-lower openings 69. The latch hitch portions 71 extend along the direction of the seat back width. That is, the return spring section 38 (resin spring) is formed by several vertical clip hitch portions 59 and horizontal clip hitch portions 71 that extend in different directions with each other resulting in the formation of the sets of pairs of vertical opening 58 and the sets of horizontal opening pairs 69 which are respectively adjacent to each other in different directions.
[0062] [0062] The side plate portions of the upper side 56 are formed with shapes that project towards the outer parts of the seat back width direction of the anchor portion 42, and are adjusted with a length direction dimension in order fit between the side wall portions 26A of the left and right side frames 26. Clips 73 (see Figure 2) are inserted into the mounting holes 34 of the rear wall portions 26C from the rear side of the seat back and fitted and anchored to the through holes 75 (see Figure 1) formed in the side portions of the top side plate 56, thus fixing the side portions of the top side plate 56 to the side frames 26. Note that several means can be adopted to fix the lateral portions of the upper side plate 56, similarly to the method of fixing the lateral portions of the lower plate 50.
[0063] [0063] The sets of horizontal opening pairs 69 described above are formed in locations excluding both the seat width steering end portions and the seat width steering center portion of the upper side return spring portion 46 ( return spring section 38). Specifically, as shown in Figures 5A and 5B, each of the horizontal openings 69 is formed in central portions between the center of the seat back width direction of the upper spring return portion 46 and the centers of the through holes 75 (tabs 73) which are positions for fixing the return spring portion of the upper side 46 to the side frames 26. In other words, each of the horizontal openings 69 is formed so that it is positioned centrally to the centers (positions L / 4 , 3L / 4: where L is the length between the centers of the left and right through holes 75) between the center of the seat back width direction of the upper spring return portion 46 (position L / 2) and the positions of the centers of the through holes 75 (positions 0, L). Note that in Figure 5B, W indicates an upper-lower width dimension of the upper side return spring portion 46, t1 and t3 indicate the upper-lower width dimensions of the horizontal openings 69, and t2 indicates a dimension of upper-lower width of the horizontal clip hitch portion 71. Furthermore, Figure 5A and Figure 5B illustrate only the right half of the seat backrest of the upper side return spring portion 46 in consideration of the size of the drawings, with a illustration of the horizontal openings 69 formed in position 3L / 4 being omitted. In these interests of ease of explanation, Figures 5A and 5B also omit the illustration of the vertical openings 58 and the vertical clip hitch portions 59. Setting the seat back cushion 18
[0064] [0064] As shown in Figure 1, the seat back cushion 18 is, in general terms, configured by a central upper portion of cushion 62, a lower central portion of cushion 64, and a pair of lateral portions of left and right cushion right 66. Note that the seat back cushion 18 is manufactured, for example, from urethane foam.
[0065] [0065] As shown in Figure 4, the vertical cross-sectional profile of the upper central portion of cushion 62 is formed substantially in an upper-lower left-inverted J shape. The upper central portion of the cushion 62 is anchored to the upper frame 28 of the seatback frame 14 from the upper side of the seatback. The vertical cross-sectional profile of the lower central portion of pad 64 is formed substantially in an inverted left-right J shape. The lower central portion of cushion 64 forms a shape with a lower portion with a curved protruding profile that projects more towards the front side of the seat than an upper portion. The lower central portion of cushion 64 is anchored from the lower side of the seat back to a connecting rod 68 that engages next to the lower end portions of the side frames 26 along the width direction of the seat. Note that the connecting rod 68 is arranged parallel to the front side of the lower frame 30 of the seat back frame 14.
[0066] [0066] Furthermore, as shown in Figure 3, the side portions of cushion 66 are respectively configured with a substantially C-shaped profile in a horizontal cross-section. The side pad portions 66 are mounted to the side frames 26 in order to wrap around the side frames 26 to which the bottom plate side portions 50 have been mounted. Note that the respective side cushion portions 66 are configured in a shape in which a lower portion with a protruding curved face profile projects more towards the front side of the seat back than an upper portion. The side cushion portions 66 project more towards the front side of the seat back than the upper central cushion portion 62 and the lower central cushion portion 64, thus configuring a shape that maintains the lateral support for an occupant H.
[0067] [0067] Turning to Figure 4, seen in vertical cross-section, the seat backrest 16 is arranged so that it goes from a side of the rear face to the lower end portion 62A of the upper central portion of cushion 62 to a side rear face end upper portion 64A of the lower central portion of cushion 64. Precisely, the rear face side upper end portion 64A of the lower central portion of cushion 64 is formed thinner than the rear face side of the end portion lower 62A, with a lower end portion of the backrest portion 36 disposed overlapping front-rear with the tuned portion.
[0068] [0068] A horizontal direction groove 70 that configures a portion of a communication portion to insert for insertion into the cover is formed between the upper central portion of cushion 62 and the lower central portion of cushion 64 described above. A pair of vertical left and right slots 72 that configure the portions of the communication portion for insertion in the cover is formed between the upper central portion of the pillow 62 and the lower central portion of the pillow 64 respectively and the side portions of the pillow 66. Each slot horizontal direction grooves 70 and vertical grooves 72 are formed in straight line shapes, and the groove widths of the horizontal direction groove 70 and vertical grooves 72 are adjusted to a length that allows the insertion of the vertical direction fixing member 22 and of the horizontal direction fixing member 24. Several (3 in the present example) through holes 82 (see Figures 3 and 6) into which the clips 22C, described below, are inserted are formed in separations of the height direction of the backrest seat on a bottom side of the vertical grooves 72, so that the front face side and the rear face side of the seat back cushion 18 are placed in common communication through the through holes 82 and the vertical grooves 72. Similarly, several (2 in the present example) through holes 84 (see Figure 4) through which the clips 24C, described below, are inserted are formed in backrest width direction separations sit on a bottom side of the horizontal direction groove 70, so that the front face side and the rear face side of the seat back cushion 18 are placed in communication with each other through the through holes 84 and the horizontal direction groove 70. Cover configuration and fixing structure 20
[0069] [0069] As illustrated in Figure 1, the cover 20 is formed in a size capable of covering the seat back cushion 18 from the front face side. In addition, the cover 20 is provided with an upper central portion of cover 74, a lower central portion of cover 76, and a pair of left and right cover side portions 78, corresponding to the split configuration of the seat back cushion 18. A cover 20 is attached to the seat backrest 16 by the vertical direction fastening members 22, by the horizontal direction fastening member 24, and by the vertical clip hitch portions 59 and the horizontal clip hitch portions 71 of the seat backrest 16 .
[0070] [0070] As shown in Figure 1, the vertical direction fastening members 22 are configured by coupling fabric with strip shape 22A, elongated fastening fastening portions 22B (hangers) made from resin and provided to one of the edges sides of the coupling fabrics 22A, and several resin clips 22C (anchoring means) (3 each in the present example) attached to the clip fixing portions 22B. The other side edges of the coupling fabrics 22A are fixed in advance by sewing to the upper central portion of cover 74, to the lower central portion of cover 76, and to the side portions of cover 78. Coupling fabrics 22A are inserted in the vertical grooves 72 of the seat back cushion 18 next to the clamp fixing portions 22B (see Figures 3 and 6). Note that in Figure 1, the vertical direction fixation members 22 (and the horizontal direction fixation member 24) are described separately in relation to the cover 20, however, the vertical direction fixation members 22 (and the horizontal direction fixing member 24) are fixed in advance to the cover 20, as previously described.
[0071] [0071] The various clamps 22C are arranged in separations from each other in the direction of height of the seat back. As shown in Figure 6, each of the clips 22C is provided with a pair of elongated arm portions 86 (gripping portions) formed from a resin material. The base end portions (length direction of one of the end portions) of the pair of arm portions 86 are formed by slot grooves 88. The slot groove 88 of one of the arm portions 86 fits by sliding into a side portion of the clip fixing portion 22B, and the slot groove 88 of the other between the arm portions 86 slips into the other side portion of the clip fixing portion 22B. In this way, the arm portions 86 are attached to the clamp attachment portion 22B, with the length direction of other end sides (front end sides) of the pair of arm portions 86 extending parallel to each other from the clamp fixing portion 22B towards the side opposite the coupling fabric 22A. It is noted that the method of fixing the pair of arm portions 86 to the clip fixing portion 22B can be varied as appropriate, and, for example, the arm portions 86 can be integrally formed through insertion molding. The projection portions 86A of the cross-sectional profile with a circular arc shape that protrudes (protrudes) towards the mutually approaching sides (opposite sides) are provided in intermediate length direction portions of the pair of arm portions 86. The hook portions 86B of triangular cross-section projecting towards mutually approaching sides (opposite sides) are provided to the length direction of other end portions (front end portions) of the pair of arm portions 86.
[0072] [0072] The various clips 22C described above are inserted into the through holes 82 formed in the lower sides of the vertical grooves 72, with the front end portions of the pair of arm portions 86 projecting towards the rear face side of the seat back 18. Clips 22C resiliently engage each of the vertical clamp engagement portions 59 (edge portions of the opening pair sets 58) along the direction of the seat back width. That is, the front end portions of the pair of arm portions 86 are inserted into the respective openings 58 of the sets of vertical opening pairs 58, and the vertical clip engaging portion 59 of the seat backrest 16 is secured between the portions of front end of the pair of arm portions 86. The hook portions 86B of each of the arm portions 86 hook to the vertical clip engagement portions 59. Therefore, each of the clips 22C is anchored to the seat backrest 16. From this Thus, the central portion of the cover 20 is fixed to the seat backrest 16 in the vertical direction. It is noted that the cleats 22C are adjusted with a sufficiently smaller height direction of the seat back dimension than the vertical openings 58, and the cleats 22C are capable of relative movement in relation to the seat backrest 16 in the direction of the backrest height. seat within the opening range 58.
[0073] [0073] It is noted that during the anchoring of the clips 22C to the vertical clip engagement portions 59 in the vertical direction, the front end sides of the pair of arm portions 86 deform resiliently in the directions departing due to the inclined faces provided to the hook portions 86B of the arm portions 86 being pressed against the vertical clip engaging portion 59. Then, the front end sides of the pair of arm portions 86 recover resiliently so that the respective hook portions 86B hook onto the vertical clip engagement portions 59. In addition, on the clips 22C, the projection portions 86A provided in intermediate length direction portions of the pair of arm portions 86 make contact with each other when the base end sides of the pair of portions of arm arm 86 are tightened in order to approach each other. From this state, further tightening the base end sides of the pair of arm portions 86 so that they come even closer together, the front end sides of the pair of arm portions 86 hinge around the respective projection portions 86A in order to move away from each other. Consequently, it is possible to release the hooked state of the respective hook portions 86B to the vertical clip engaging portions 59 (i.e., the anchored state of the clips 22C to the vertical clip engaging portions 59), and to remove the clips 22C from the backrest of seat 16.
[0074] [0074] As shown in Figure 1, the horizontal direction fastening member 24 is configured by a strip-shaped coupling fabric 24A, an elongated fastening fastening portion 24B that is made of resin and provided on a side edge of the coupling fabric 24A, and various resin clips 24C (anchoring means) (2 in the present example) attached to the clip attachment portion 24B. The basic configuration is similar to that of the vertical direction fixing member 22. The other side edge of the coupling fabric 24A is fixed in advance by sewing to the upper central portion of cover 74 and the lower central portion of cover 76. The various clips 24C they are configured similarly to the clamps 22C, and are arranged separately from each other along the direction of the seat back width. Clips 24C engage resiliently in the direction of height of the seat back to the pair of horizontal left and right clamp hitch portions 71 (edge portions of the opening pair sets 69) formed to the return spring body portion 54 of the seat backrest 16, thereby securing a central portion of the cover 20 to the seat backrest 16 in the horizontal direction. That is, in the present exemplary embodiment, the various clips 22C, 24C attached to the side of the cover 20 are anchored to the seat backrest 16, thus positioning the seat backrest cushion 18 in relation to the seat backrest 16 in the wide direction seat backrest and in the direction of the seatback height. Note that the anchoring method and the anchoring release method of the 24C clips to the horizontal clip engagement portions 71 are similar to those of the 22C clips. In addition, the clips 24C are adjusted to a dimension along the direction of the seat back width that is sufficiently smaller than that of the openings 69, so that the clips 24C are capable of relative movement in relation to the seat backrest 16 in the direction of seat back width within the opening range 69.
[0075] [0075] The outer peripheral anchor portions with arrowhead shape 80 are fixed to appropriate positions of the outer peripheral portions of the cover 20 by sewing. The outer peripheral anchor portions 80 are inserted and anchored to the anchor portion 42 of the backrest portion 36 from the rear side of the vehicle. In this way, the outer peripheral portions of the cap 20 are anchored to the backrest portion 36. Advantageous operation and effects of the present exemplifying modality
[0076] [0076] The following explanation refers to the operation and the advantageous effects of the present exemplary modality.
[0077] [0077] The vehicle seat 10 configured as described is provided with a seat backrest 16 with the resin return spring section 38 (resin spring) integrally formed to the resin backrest portion 36. The seat backrest 16 is fitted close to the metal seatback frame 14 from the front side of the seatback. Specifically, the left and right side portions 50 are fitted next to the left and right side frames 26 from the front side of the seat back, and in this state, the side portions of plate 50 are attached to the side frames 26 to from the outside of the seat back width direction. Next, the seat back cushion 18 is mounted to the seat back frame 14 from the front side of the seat back, and then the cover 20 is covered over the seat back cushion 18. Members of vertical direction fixing 22 and the horizontal direction fixing member 24 are fixed to the cover 20 in advance by sewing, and the clips 22C of the vertical direction fixing members 22 and the clips 24C of the horizontal direction fixing member 24 are engaged with the vertical clip hitch portions 59 and the corresponding horizontal clip hitch portions 71 while covering the cover 20 over the seat back cushion 18. The outer peripheral anchor portions 80 of the cover 20 are then anchored to the backrest portion 36 da.
[0078] [0078] The seat cushion 11 and the headrest, not shown in the drawings, are attached to the seat backrest 12 thus mounted to configure the vehicle seat 10. When occupant H (see Figure 3) sits on the seat of vehicle 10, a load P towards the rear side of the seat back is inserted into the return spring section 38 through the cover 20 and the seat back cushion 18. Consequently, the lower side return spring body portions 48, 49, 51 and the return spring body portions of the upper side 54 undergo bending deformation towards the rear side of the seat back which is the direction of the loading action. When this occurs, the load P is transmitted from the left and right side portions 50 to the left and right side frames 26, so that a reaction force arises from the side frames 26 towards the front side of the backrest. seat.
[0079] [0079] When the load P is inserted from occupant H to the return spring section 38, the return spring section 38 itself undergoes bending deformation, thus making a contribution in relation to maintaining the properties of seat back padding 12. The load P itself is transmitted to the left and right side frames 26 and supported by the left and right side frames 26. As a result, adequate padding performance can be ensured on the seat back 12. The section return spring 38 is integrally provided with a backrest portion formed by resin 36, thus allowing the number of components and the number of assembly steps to be reduced compared to when the return spring section 38 is configured by a metal seat back spring. As a result, according to the present exemplary embodiment, it is possible to ensure adequate cushioning performance for the seat back 12, while also allowing a reduction in weight and costs to be achieved.
[0080] [0080] Furthermore, in the present exemplary embodiment, the various clips 22C, 24C attached to the side of the cover 20 are attached to the vertical clip hitch portions 59 and to the horizontal clip hitch portions 71 of the seat backrest 16, thus allowing , that the cover 20 is anchored to the return spring section 38 of the seat backrest 16. An operation of anchoring the cover 20 to the return spring section 38 (resin spring) can consequently become easier than with conventional anchoring structures that employ, for example, curvature rings. In addition, a reduction in weight for the vehicle seat can be obtained since the metal curvature rings can be omitted. Since the vertical clip hitch portions 59 and the horizontal clip hitch portions 71 are provided to the return spring section 38 of the seat backrest 16 simply by forming the openings 58, 69, any detriment to the Moldability of the return spring section 38.
[0081] [0081] Furthermore, in the present exemplary embodiment, when the pairs of arm clips 86 provided to the clips 22C, 24C are inserted in the respective sets of opening pairs 58, 69, the hook portions 86B formed on the front end sides of the pairs of arm portions 86 hook to the vertical clip engagement portions 59 and the horizontal clip engagement portions 71 formed in the opening pair sets 58, 69. Consequently, the cap 20 to which the clips 22C, 24C are attached can be easily anchored to the seat backrest 16. Furthermore, by moving away from the pair of arm portions 86, the clamps 22C, 24C, that is, cover 20, can be removed from the seat backrest 16. An operation to remove the means anchoring (ie cover 20) from the seat backrest 16 can therefore become easier, for example, than when an arrowhead shaped anchoring means is inserted into a single opening and the anchored to the edge portions of the opening.
[0082] [0082] Furthermore, in the present exemplary embodiment, a configuration is made so that when the base end sides of the pair of arm portions 86 of the clips 22C, 24C are brought together, the front end sides of the pair of arm portions 86 move away from each other by pivoting around the intermediate portions of the pair of arm portions 86 (the projection portions 86A). Since the anchored state of the clips 22C, 24C (hooked state of the hook portions 86B) in relation to the vertical clip engaging portions 59 and the horizontal clip engaging portions 71 can be released, the clips 22C, 24C, i.e. , the cover 20, can be easily removed from the seat backrest 16. Consequently, the replacement of the cover 20, for example, can be carried out easily. Furthermore, the front end sides of the clips 22C, 24C can be separated simply by pivoting around the projection portions 86A provided in the intermediate portions of the pair of arm portions 86, thus obtaining an extremely simple configuration for the clips 22C , 24C.
[0083] [0083] In the present exemplary embodiment, the return spring section 38 of the seat backrest 16 is provided with bending portions 48A, 49A, 51A, 54A that are formed with wavy cross-sectional profiles. Consequently, a contribution to the spring properties of the return spring section 38 can be made easily with a simple configuration. Furthermore, the spring constant of the return spring section 38 can be easily varied by appropriately varying the settings for the positions of the openings 58, 59 formed to the return spring section 38. That is, in the present example mode, due to the integration with a structure to anchor the cover 20 to the return spring section 38 and a structure to vary the spring constant, a reduction in weight and a cost reduction can be obtained for the return spring section 38.
[0084] [0084] Furthermore, in the present exemplary embodiment, both end portions of the seat back width direction of the upper side return spring portion 46 are supported (fixed) on the side frame side 26 of the backrest frame seat 14. Consequently, similarly to a support beam that is fixed at both ends, when the load P (see Figure 3) is inserted next to the width direction of the central seat of the return spring portion on the side upper 46, the stress is greater in both the end portions of the seat back width direction and in the central portion of the seat back width direction of the upper spring return portion 46, and the stress is less both between the end portions of the seat back width direction as between the center portion of the seat back width direction of the upper side return spring portion 46 (see Figure 5C). In this sense, in the present exemplary embodiment, since the horizontal openings 69 are formed both between the end portions of the seat back width direction and between the central portion of the seat back width direction of the return spring portion of the upper side 46, that is, in places where stress / load is less, the width, for example, of the return spring portion of the upper side 46 can be adjusted small while still maintaining the hardness and stiffness of the spring portion of upper side return 46. As a result, it is possible to obtain a reduction in weight and a cost reduction of the upper side return spring portion 46, and therefore to the vehicle seat 10. Note that the vertical openings 58 can obtain advantageous effects similar to those described previously, since the vertical openings 58 are formed in locations excluding both the end portions of the seat back width direction and the central portion d the direction of the seat back width of the upper side return spring portion 46 and the lower side return spring portion 44.
[0085] [0085] Due to the fact that the upper spring return body portion 54 has a small width W, it is possible to adjust the flexion of the upper spring return portion 46. That is, when the incoming load to the spring is P, the spring length is L, the Young's modulus of the spring is E, and the secondary cross-sectional moment of the spring is I, then the spring deflection δ can be derived by the formula PL3 / 48EI. Since the δ spring deflection is proportional to 1 / W, reducing W (the width of the spring), a greater δ spring deflection can be maintained. This point is also true for the lower side return spring body portions 48, 49, 51 of the lower side return spring portion 44.
[0086] [0086] Furthermore, in the present exemplary embodiment, the various cleats 22C and cleats 24C attached to the side of the cover 20 are anchored to the seat backrest 16, to the cover 20 thus positioning the seat back cushion 18 in the width direction. seat backrest and in the height direction of the seat backrest (in 2 directions) in relation to the seat backrest 16. The unintentional positional displacement of the seat backrest cushion 18 in relation to the seat backrest 16 can therefore be suppressed. In addition, the engagement direction of the clamps 22C in relation to the vertical clutch engagement portions 59 is configured in the direction of the seat back width, with a different engaging direction adjusted for the clamps 24C in relation to the horizontal clutch engagement portions. 71. Additionally, cleats 22C are configured so that they are capable of relative movement in the direction of height of the seat back in relation to the seat backrest 16 within the range of openings 58, and cleats 24C are configured so that they are capable of relative movement in the direction of the seat back width in relation to the seat backrest 16 within the opening range 69. Consequently, the seat back cushion 18 can be positioned in the direction of the seat back width and in the direction height of the seat back in relation to the seat backrest 16 while the relative movement of the clamps 22C, 24C described above absorbs any variation in the mounting of the seat back cushion 18 to the seat backrest 16. Consequently, an easy fabrication for the vehicle seat can be achieved.
[0087] [0087] Furthermore, in the present exemplary embodiment, the resin seat backrest 16 is fully equipped with a plate body 40 and a return spring section 38, however, good moldability for the backrest can still be maintained seat 16 since only the openings 58, 59 are formed in the return spring section 38. That is, for the anchoring structure of the cover 20 and the return spring section 38, a configuration in which, as in the Comparative Example illustrated in Figure 7, a pair of hook portions 104 is formed projecting from the return spring section 38 and the engaging portions 102 of the arrow shaped cross section coupled to the side of the cover 20 engage resiliently to the pair of hook portions 104. However, in this configuration, the hook shape on the front end sides of the hook portions 104 forms a lower cut in relation to the direction of removal from a mold, in need of use of a mold core. In addition, removal is difficult since the engagement portions 102 have been engaged with the hook portions 104, making replacement of the cover 20, for example, more complicated. In this sense, in the present exemplary modality, adopting openings 58, 69 maintains good moldability, while adopting clamps 22C, 24C allows easy fixation and removal to be obtained for the cover 20. SECOND EXAMPLIFYING MODE
[0088] [0088] The following explanation refers to a second exemplary embodiment of the present invention with reference to Figures 8 to 10. It is noted that the configuration portions similar to those of the first exemplifying embodiment described above are allocated with the same numerical references and their explanations will be omitted.
[0089] [0089] As illustrated in Figures 8 and 9, a seat backrest 100 of the second exemplary embodiment has a basic configuration similar to the seat backrest 16 according to the first exemplifying embodiment. However, in the seat backrest 100, only the lower side return spring portion 44 'is integrally molded with resin to the backrest portion 36. An upper side return spring portion 46' is integrated with the backrest portion 36 by thermal welding. When the bending portions 48A ', 49A', 51A '(corrugated portions) of the lower side return spring body portions 48', 49 ', 51' of the lower side return spring portion 44 'are being molded from of resin in a sliding mold, not shown in the drawings, an angle (tapered profile) is adjusted so that the sliding mold can be removed along the height direction of the seat back.
[0090] [0090] For an additional explanation, in the present example mode, as illustrated in Figure 10, where H1, H2, H3 are the spring depth, L1, L2, L3 are the spring slope, and t1, t2, t3 are the spring plate thickness of the respective lower side return spring body portions 48 ', 49', 51 ', a difference in profiles between the lower side return spring body portions 48', 49 ', 51' is adjusted so that it provides the relationships (1) to (3) below. In other words, among them the lower side return spring body portions 48 ', 49', 51 'satisfy the relationships (1) to (3) below and the lower side return spring body portions 48', 49 ', 51' are respectively adjusted to the aforementioned angle. H1 <H2 <H3 (1) L1 <L2 <L3 (2) t1 <t2 <t3 (3)
[0091] [0091] Note that in Figure 8, the tapered profiles of the bending portions 48A ', 49A', 51A 'are illustrated in a significantly exaggerated manner. In Figure 8, the flexing portion (corrugated portion) of the upper side return spring body portion 46 'is omitted from the illustration, however, since the upper side return spring portion 46' is attached to the portion of backrest 36 at a later stage, the return spring portion of the upper side 46 'can be applied to a desired wavy shape, or a decision can be made not to apply a wavy shape.
[0092] [0092] Considering the side portions of the upper side plate 56 (coupling and fixing portions) provided at both end portions of the return spring portion of the upper side 46 'as extension portions of the side portions of the lower plate 50 of the lower side return spring portion 44 ', both the lower side return spring portion 44' and the upper side return spring portion 46 'can be integrally formed with the backrest portion 36. In such cases, since the bending portion of the upper side return spring portion 46 'is also formed with a tapered profile, the angle of the bending portion of the upper side return spring portion 46 should be considered next to that of the bending portions 48A' , 49A ', 51A' of the lower side return spring portion 44.
[0093] [0093] The openings 58, 69, the vertical clip hitch portions 59, and the horizontal clip hitch portions 71 are omitted from the illustration in Figures 8 to 10, however, a configuration other than that described above is similar to the configuration of the first exemplifying modality. Advantageous operation and effects
[0094] [0094] According to the previous configuration, an advantageous operation and effects similar to those of the first example described above are obtained. In addition, the following operation and advantageous effects are obtained in the present exemplary modality. That is, in the seat backrest 100, the lower side return spring portion 44 'is integrally molded with the backrest portion 36. Consequently, in the manufacture of the seat backrest 100, when a general molding method is employed to remove the mold to the front side of the seat backrest 100 (see arrow C in Figure 9) and to the rear side of seat backrest 100 (see arrow D in Figure 9), a lower cut area appears in a gap 52 between the portion lower side return spring 44 'and the backrest portion 36. When an integral sliding mold is employed in an attempt to shape this area, it is necessary to employ a method in which the sliding mold is removed towards the height of the seat backrest 100, however, in such cases, there is a need to design each of the lower side return spring body portions 48 ', 49', 51 'with profiles that allow removal of the sliding mold.
[0095] [0095] In relation to this point, since in the present exemplary embodiment, the flexion portions 48A ', 49A', 51A 'of the lower lateral return spring body portions 48', 49 ', 51' are adjusted with a angle and with different profiles, the sliding mold can be easily removed to the upper side of the height direction of the seat back even when an integral side mold is used. As a result, the seat backrest 100 can be manufactured efficiently, and a cost reduction can be obtained for the mold. Further explanation of previous examples
[0096] [0096] In each of the exemplary embodiments, the resin return spring section 38 (resin spring) is integrally formed to the resin backrest portion 36, however, the invention of claims 1 to 7 and claim 10 does not is limited to this, and the backrest portion and the resin spring can be formed separately. The resin spring can also be integrally provided with the resin backrest portion. That is, the backrest portion and the resin spring can be manufactured separately and then integrated, for example, by welding. The return spring body portions and side plate portions that configure the resin spring can also be manufactured as separate components and then integrated together, for example, by welding. Furthermore, in each of the previous exemplifying modalities, an explanation is provided in which the coupling and fixation portions 50 are configured as configuration elements on the side of the return spring section 38, however, the coupling and fixation portions 50 they can also be treated as configuration elements on the side of the backrest portion 36. This is due to the fact that in the complete state of the seat backrest, the question of whether the configuration element of the coupling and fixing members are included on the side of the backrest return spring section or included on the side of the backrest portion consists merely of one of the classifications.
[0097] [0097] In addition, in each of the exemplary modalities described above, an explanation of an anchoring structure for anchoring the cover 20 of the seat backrest 12 to the return spring section 38 (resin spring) provided to the backrest was provided. seat 12, however, the invention according to claims 1 to 6 and claim 10 is not limited to this, and a structure for anchoring a seat cover to a seat cushion can be applied to a resin spring provided to the cushion the seat. In such cases, a configuration is made in which a cushion seat cushion is supported by a resin spring with both end sides supported on a seat cushion frame, and the cleats fixed on the side of the seat cover that covers the front face of the cushion seat cushion are anchored to the edge portions of the resin spring formed openings.
[0098] [0098] In addition, in each of the exemplary modalities described above, a configuration is made in which several sets of pairs of openings 58, 69 are formed to the return spring section 38 so that they are adjacent to each other along different thus forming the various vertical clip hitch portions 59 and the horizontal clip hitch portions 71 that extend in different directions, with the clips 22C, 24C engaging the clip hitch portions 59, 71. In the However, the invention according to claims 1 to 5 and claims 10 to 14 is not limited to this, and the profiles and directions of the pairs of openings and the clip engagement portions can be varied as appropriate.
[0099] [0099] In each of the previous exemplary embodiments, a configuration is made in which both end portions of the seat back width direction portion of the lower side return spring portion 44 (44 ') and the spring portion of upper side return 46 (46 ') are attached to side frames 26, and openings 58, 69 are formed in locations excluding both end portions of the seat-back width direction and central portions of the back-width direction of the lower side return spring portion 44 (44 ') and the upper side return spring portion 46 (46'). However, the invention according to claims 1 to 4, claim 11 and claim 12 is not limited to this, and the placement of the openings can be varied as appropriate.
[0100] [00100] Furthermore, in each of the previous exemplifying modalities, a configuration is made in which the pairs of openings 58, 68 are formed respectively adjacent to each other in the return spring section 38, and the clamp hitch portions 59, 71 are configured between the pairs of openings 58, 69, with the clip engagement portions 59, 71 being held by the clips 22C, 24C which include the pairs of arm portions 86. However, the invention according to claim 1 and with claims 11 to 14 it is not limited to this, and the number of openings and the configuration of the clips (anchoring means) can be varied as appropriate. For example, a configuration can be made in which the anchoring means (anchoring elements) provided on the front end sides with the hook portions (hook shapes) that are capable of resilient deformation are inserted in a single opening and hook onto a portion of the opening edge.
[0101] [00101] In each of the exemplary modalities described above, a configuration is made in which the return spring section 38 is provided with bending portions 48A, 49A, 51A, 54A (48A ', 49A', 51A ', 54A ') which are formed with wavy cross-sectional profiles, and the openings 58, 69 are formed in these bending portions. However, the invention according to claims 1 to 3 and claim 11 is not limited to this, and the profiles of the bending portions can be varied as appropriate. Likewise, it is possible to perform a configuration in which the openings are formed in portions with the shape of a flat plate in relation to the flexion portions.
[0102] [00102] Furthermore, in the present example embodiment, the return spring section 38 is divided into the lower side return spring portion 44 (44 ') and the upper side return spring portion 46 (46'), however , there are no limitations, and the two components can be connected and integrated together. That is, a configuration can be adopted in which the side portion of the lower plate 50 is extended to the upper side of the seat back and both end portions of the upper seat back width direction and the body portion of return spring 54 (54 ') joined to them.
[0103] [00103] In the present exemplary embodiment, the return spring portion on the upper side 46 (46 ') is configured by a single row (1 individual), however, there is no limitation to this, and a configuration with several (plural) rows of the upper side return spring portion 46 (46 '), with several (plural) rows of spring portions provided in equal separations spanning from an upper portion to a lower portion of the backrest portion 36 .
[0104] [00104] Several other modifications can be implemented within a range that does not differ from the spirit of the present invention. The scope of rights covered by the present invention is obviously not limited by each of the exemplary modalities described above.

权利要求:
Claims (10)
[0001]
Vehicle seat, characterized by the fact that it comprises: a resin spring that is (i) made from resin, (ii) supported on both end sides by a seat frame, and (iii) formed with at least one pair of adjacent openings, each pair with a portion clamp hitch configured between the pair of openings, the resin spring including a flexion portion between both end sides, the flexion portion has a wavy cross-sectional profile that extends in a direction of width of the backrest the seat, formed of plural curved faces joined in the direction of the width, and configured to stretch when a load acts in one direction towards a rear side of the seat back; a pad supported on the resin spring; a seat cover that covers a front face of the cushion; and a clip that is attached to the side of the seat cover, which includes a pair of arm portions that are respectively inserted into the pair of openings, with a hook portion formed on one front end side of each of the pair of portions of the arm, the respective hook portions are hooked on the clip engagement portions in order to anchor the clip on the edge portions of the pair of openings.
[0002]
Vehicle seat, according to claim 1, characterized by the fact that: the clip is configured so that when the base end sides of the arm portion pair are brought together, the front end sides of the arm portion pair hinge around an intermediate portion of the arm portion pair so to move away.
[0003]
Vehicle seat, according to claim 1, characterized by the fact that: the openings are formed in the flexion portion.
[0004]
Vehicle seat according to claim 1 characterized by the fact that: the resin spring is attached to both end portions of the seat frame; and the openings are formed in one location excluding both the end portions and a central portion of the resin spring.
[0005]
Vehicle seat, according to claim 1, characterized by the fact that it also comprises: a plurality of clips; and a plurality of pairs of adjacent openings, where: at least two of the clips attached to the seat cover are respectively anchored to at least two of the clip engagement portions formed on the resin spring, so that at least two of the clips have different engaging directions, relative to the portions of the clip. clamp coupling, with the seat cover thus positioning the cushion in relation to the resin spring in at least two directions.
[0006]
Vehicle seat, according to claim 1, characterized by the fact that: the seat frame is a seat back frame that includes a pair of left and right side frames; the resin spring is arranged along a direction of the seat back width between the pair of side frames; the cushion is a seat back cushion which is arranged on one side of the front face of the resin spring and provided with a communication portion which places one side of the front face and one side of the rear face in communication with each other ; the seat cover covers at least the front face side of the seat back cushion; and the clip is inserted through the communication portion and anchored to the edge portion of the pair of openings.
[0007]
Vehicle seat, according to claim 6, characterized by the fact that: the resin spring is integrally provided with a seat backrest which is made of resin and provided with a backrest portion disposed on a rear face side of the seatback frame.
[0008]
Vehicle seat, according to claim 7, characterized by the fact that: a plurality of resin springs are provided so that they are separated from each other in a direction of height of the seat back, the plurality of resin springs being adjusted at an angle to allow the removal of a mold in a height directions of the seat back.
[0009]
Vehicle seat, according to claim 2, characterized by the fact that intermediate portions of each one of the pair of arm portions are provided with projection portions that project in directions that approach each other.
[0010]
Vehicle seat, according to claim 1, characterized by the fact that: the flexing portion has a wavy cross section when viewed in a direction substantially perpendicular to the direction of the rear side of the seat back.

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同族专利:

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公开号 | 公开日

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EP2705981A1|2014-03-12|

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KR101495243B1|2015-02-24|

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BR112013027943A2|2017-01-17|

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WO2012150633A1|2012-11-08|

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EP2705981B1|2019-04-03|

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AU2011367335A1|2013-11-21|

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US20140049090A1|2014-02-20|

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CN103502047A|2014-01-08|

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RU2540033C1|2015-01-27|

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US9505329B2|2016-11-29|

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CN103502047B|2015-12-02|

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JP5692369B2|2015-04-01|

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KR20130128021A|2013-11-25|

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EP2705981A4|2014-12-03|

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JPWO2012150633A1|2014-07-28|

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法律状态:
2018-03-27| B15K| Others concerning applications: alteration of classification|Ipc: B60N 2/70 (2006.01), B60N 2/58 (2006.01), B60N 2/7 |

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2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-08-27| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-12-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-01-12| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 02/05/2011, 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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PCT/JP2011/060554|WO2012150633A1|2011-05-02|2011-05-02|Vehicle seat and seat back board|

---