light emitting device

专利摘要:
"LIGHT EMISSION DEVICE". The present invention relates to a light emitting device (10) which comprises: a substrate (14) which holds one end of the connection terminals (20a, 20b) and on which an electronic component (18) is mounted; a light emitting element (12) which is mounted on a face (16) of the substrate (14); a support member (22) on which the substrate (14) is mounted; and a cover section (24) which positionally locates and holds the substrate (14), mounting on the support member (22) in a condition that touches a face (16) of the substrate (14). The cover section (24) has a cover section body (60) that covers a face (16) of the substrate (14); on the cover section body (60), a light guide (66) is provided, through which the light that is emitted from the light emitting element (12) passes, in a condition in which its movement is restricted along directions on either side of the substrate (14).
公开号:BR112014027812B1
申请号:R112014027812-1
申请日:2012-05-09
公开日:2020-06-30
发明作者:Masanori Suzuki
申请人:Ts Tech Co., Ltd.；
IPC主号:

专利说明:

[0001] [001] The present invention relates to a light emitting device that has a plate on which a light emitting element is mounted. Fundamentals of Technique
[0002] [002] Until now, light emitting devices that are provided with a light emitting diode (LED) have been widely used to illuminate the passenger compartments of vehicles.
[0003] [003] A technical idea has been proposed that, in a light emitting device of the type above, a lens (light guide) to cover an LED is disposed on the mounting surface of a plate on which the LED is mounted, and a box is mounted on a connector while pressing an upper surface of the lens towards the plate, thereby sandwiching and securing the lens and plate (see, for example, Japanese Patent Publication Open to Public Inspection Number 2010-083210) .
[0004] [004] According to the invention described in Japanese Patent Publication Open to Public Inspection Number 2010-083210, however, as the plate and lens are sandwiched and secured using the box and connector, it is necessary to make the lens relatively strong . Consequently, the lens itself becomes large in size, and consequently the light emitting device becomes large in size and weight as a whole.
[0005] [005] Japanese Patent Publication Open to Public Inspection Number 2009-239255, for example, proposes a light emission device in which a plate is held in place with a voltage acting on the light guide being reduced. The light emitting device is provided with a box and a cover that mounts inside the box. A plate with a pump-shaped LED lamp mounted on it is arranged inside a chamber that is defined between the box and the cover, which sandwich the plate between them.
[0006] [006] Specifically, the case has a pair of facing side walls that have respective holes defined in them. The cover that is fastened to a surface (mounting surface) of the board has teeth mounted inside the holes in the side walls. The side walls are joined by a wall that has a lower end surface. Under a condition that the lower end surface touches against the other surface of the plate, the teeth are mounted inside the holes, thereby the plate is secured.
[0007] [007] Japanese Patent Publication Open to Public Inspection Number 2009-239255 also describes a technical idea in which a tubular portion to insert a bar-shaped light guide body (light guide) to guide the emitted light of the LED lamp is arranged inside the box and the tubular portion has a protuberance on its internal surface to position the light guide body thereby maintaining the distance between the light guide body and the LED lamp constant. Summary of the Invention
[0008] [008] However, there is nothing described in Japanese Patent Publication Open to Public Inspection Number 2009-239255 as to how the light guide body is positioned by the protrusion. If the end face of the light guide body that faces the LED lamp is held in top position against the protrusion, thereby positioning the light guide body vertically within the tubular potion, then the light guide body tends to move with respect to the tubular portion by gravity, consequently increasing the distance between the light emitting element and the light guide body or displacing the light guide body from the tubular portion.
[0009] [009] The present invention was made in view of the above problems. It is an object of the present invention to provide a light emitting device which is capable of maintaining the distance between a light emitting element and a constant light guide regardless of the orientation of the light emitting device and which is reduced in size and Weight.
[0010] [0010] In accordance with the present invention, a light emitting device is provided that includes a plate that holds one end of a connection terminal and on which an electronic component is mounted, a light emitting element mounted on a the plate surface, a support member on which the plate is placed, and a cover positioning and securing the plate being mounted on the support member while topping against the plate surface.
[0011] [0011] The cover has a main cover body that covers the surface of the plate, and a light guide to pass through it the light emitted from the light emitting element is arranged on the main cover body while being prevented from moving along a direction to sandwich the plate (claim 1).
[0012] [0012] Preferably, the cover has a pair of protrusions positioned so that the light-emitting element is interposed between the protrusions, and the protrusions being integrally formed with the main covering body, the protrusions include edges that top against the plate surface, and first coupling portions, and the support member has a chamber defined therein to accommodate the plate and cover, and also has second coupling portions to couple with the first coupling portions, and the first portions of coupling couple with the second coupling portions to thereby position and secure the plate with the cover (claim 2).
[0013] [0013] Preferably, the support member is integrally formed of resin material, and the cover is integrally formed of a resin material (claim 3).
[0014] [0014] Preferably the first coupling portions are mounting teeth that have tuned surfaces formed on them, and the second coupling portions are mounting holes within which the first coupling portions are mounted (claim 4).
[0015] [0015] Preferably, the chamber is defined in the support member by a wall, the wall including a bottom surface and a pair of steps that rise from the bottom surface, and the plate has another surface spaced from the bottom surface and placed on the upper surfaces of the steps (claim 5).
[0016] [0016] Preferably the connection terminal includes a bonded section connected to the plate, and a conductor section contiguous to the bonded section and extending parallel to the surface of the plate, and the cover has a terminal clamp that secures the conductor section ( claim 6).
[0017] [0017] Preferably, the electronic component is electrically connected to the light emitting element and mounted on only the surface of the plate (claim 7).
[0018] [0018] Preferably, the light guide is a lens for diverging or converging the light emitted from the light emitting element, the lens being integrally formed with the covering body in relation to the light emitting element (claim 8).
[0019] [0019] Preferably, the light guide is a light guide body to guide the light emitted from the light emitting element, the main cover body has a tubular portion within which the light guide is mounted and the tubular portion has, on its internal surface, a first stop to bump against the light guide in order to prevent the light guide from moving in one direction of the plate, and a second stop to bump against the light guide that it is attached to the top stop against the first stop, thereby preventing the light guide from moving in the direction away from the plate (claim 9).
[0020] [0020] Preferably, the tubular portion is integrally formed of a resin material (claim 10).
[0021] [0021] Preferably, the light guide has a main light guide body, and a convexity to bump against the second stop, the convexity being integrally formed with an external surface of the main light guide body, the convexity being stuck on topamento against the second stop to thereby prevent the light guide from moving in a direction away from the plate (claim 11).
[0022] [0022] Preferably, at least one of the second stop and the convexity has a tapered surface formed on it (claim 12).
[0023] [0023] Preferably, a rotation limiter is formed on the contact surfaces of the tubular portion and the main light guide body (claim 13).
[0024] [0024] Preferably, the first stop includes two first stops disposed in relation to each other, and the second stop includes two second stops disposed in relation to each other (claim 14).
[0025] [0025] Preferably, a curved section is arranged between the adhered section and the conductor section (claim 15).
[0026] [0026] Preferably, at least any of the first coupling portions or the second coupling portions are arranged to interpose the light guide between them (claim 16).
[0027] [0027] Preferably, the conductor section includes a folded portion, the support member has a groove portion folded in a way that corresponds to a shape of the folded portion, and the folded portion is arranged for topping against a lateral surface of groove of the folded groove portion (claim 17).
[0028] [0028] According to the invention recited in claim 1, the plate is positioned and secured by the cover that is mounted on the support member while being fixed on topamento against the surface of the plate. As the plate is held in position with reduced voltages acting on the light guide, the light emitting device can be reduced in size and weight. As the light guide is arranged over the main cover body while being prevented from moving in one direction to sandwich the plate, the distance between the light emitting element and the light guide is kept constant regardless of the orientation of the light emitting device.
[0029] [0029] According to the invention recited in claim 2, the first coupling portions respectively arranged on the protrusions integrally formed with the main cover body, coupled with the second coupling portions on the support member to thereby secure the plate with coverage. Therefore, the plate can be stably attached with respect to the support member. Thus, the light emitting device as a whole can effectively be reduced in size and weight.
[0030] [0030] The protrusions have respective edges maintained in topamento against the surface of the plate. Therefore, even when a plurality of light emitting devices are manufactured, the distance between the light emitting element and the light guide is kept constant. As a result, the light emitting device is prevented from having variations in quality.
[0031] [0031] According to the invention recited in claim 3, since both the support member and the cover are made of a resin material, when the cover is mounted on the support member, the cover is resiliently held in position flexibly.
[0032] [0032] According to the invention recited in claim 4, the first coupling portions are the mounting teeth that have tuned surfaces, and the second coupling portions are the mounting holes, so that the cover can be easily inserted into the support member.
[0033] [0033] According to the invention recited in claim 5, when the other surface of the plate comes up against the upper surfaces of the steps, a gap is formed between the plate and the bottom surface. Because of this, the heat generated by the light emitting element, etc. is dissipated into the gap, so that any increase in the temperature of the light emitting element etc. it can be made smaller than if the entire other surface of the plate was kept in contact with the bottom surface.
[0034] [0034] According to the invention recited in claim 6, as the conductor section of the connection terminal is secured by the cover terminal clamp while the adhered section of the connection terminal is connected to the plate, the plate is held in the most stably.
[0035] [0035] According to the invention recited in claim 7, as the electronic component is mounted only on the surface of the plate (the surface on which the light emitting element is mounted), the light emitting device can suitably be smaller in size and weight as a whole than if the electronic component were mounted on the other surface of the board.
[0036] [0036] According to the invention recited in claim 8, as the light guide is the lens, the degree of divergence or convergence of light (light distribution characteristics) that has passed through the lens is prevented from varying. Furthermore, as the light guide is integrally formed with the main cover body, the number of parts used can be reduced, and the distance between the light guide and the light emitting element can be kept constant.
[0037] [0037] According to the invention recited in claim 9, as the light guide which is the light guide body for guiding the light emitted from the light emitting element is fixed on topamento against the first stop of the tubular portion for prevent the light guide from moving towards the plate, the light guide can be positioned inside the tubular portion. Furthermore, since the light guide is clamped against the second stop while being clamped against the first stop, thereby preventing the light guide from moving in the direction away from the plate, the light guide is not shifted in position with respect to the tubular portion even if, for example, the light emitting device was oriented in such a way that the opening of the remote tubular portion of the plate was oriented vertically downwards. The distance between the light emitting element and the light guide can thus be kept constant regardless of the orientation of the light emitting device.
[0038] [0038] According to the invention recited in claim 9, as the light guide is positioned and secured by the first stop and the second stop on the inner surface of the tubular portion, it is not necessary to form holes in the wall of the tubular portion to secure the light guide. Consequently, the light emitted from the light emitting element is free from the problem of leaking out through such holes. Consequently, the quality of the light emitting device can be increased without involving an increase in the number of parts used.
[0039] [0039] According to the invention recited in claim 10, as the tubular portion is made of resin material, when the light guide is inserted into the tubular portion, the tubular portion is folded out radially. Therefore, the light guide can easily be inserted into the tubular portion.
[0040] [0040] According to the invention recited in claim 11, insofar as the convexity to bump against the second stop is integrally formed with the external surface of the main light guide body, when the light guide is inserted in the tubular portion , the convexity is pressed against the second stop, thereby the tubular portion is bent radially outward. The light guide can thus be more easily inserted into the tubular portion.
[0041] [0041] According to the invention recited in claim 12, as at least one of the second stop and the convexity has the tuned surface formed on it, the light guide can more easily be inserted into the tubular portion.
[0042] [0042] According to the invention recited in claim 13, as the rotation limiter is formed on the contact surfaces of the tubular portion and the main light guide body, the light guide inserted in the tubular portion is suitably prevented from rotate in circumferential directions of the tubular portion.
[0043] [0043] According to the invention recited in claim 14, the first pair stops are arranged in relation to each other, and the second pair stops are arranged in relation to each other. Therefore, the light guide can be positioned and attached to the tubular portion in a better balanced way than if a first stop and a second stop were provided. As the first pair of stops are arranged in relation to each other, when the tubular portion (cover) must be formed by injection molding, a core disposed within the tubular portion can be composed of separate members of adequate size for easy removal of the core of the tubular portion.
[0044] [0044] According to the invention recited in claim 15, as the curved section is arranged between the adhered section and the conductor section, a shock that acts on the adhered section can be appropriately reduced by the curved section even if, for example, a connector for supplying electrical power is connected to the conductor section.
[0045] [0045] According to the invention recited in claim 16, the first plural coupling portions or the second plural coupling portions are arranged so as to interpose the light guide between them. Consequently, the light guide is suitably prevented from being displaced in position with respect to the support member. In other words, the support stiffness for the light guide can be increased.
[0046] [0046] According to the invention recited in claim 17, the folded portion is able to bump against the groove side surface which defines the folded groove portion. Therefore, the groove side surface acts as a load receiving portion when a connector for supplying electrical power is connected to the conductor section. Therefore, the adhered section can be appropriately prevented from being damaged. Brief Description of Drawings
[0047] [0047] Figure 1 is a perspective view of a light emitting device according to an embodiment of the present invention; Figure 2 is an exploded perspective view of the light emitting device shown in Figure 1; Figure 3 is a plan view of a case of the light emitting device shown in Figure 2; Figure 4 is a perspective view of a cover of the light emitting device shown in Figure 2, as seen from behind; Figure 5 is a cross-sectional view taken along the VV line of Figure 1 before the cover is assembled in place; Figure 6 is a cross-sectional view taken along line VI-VI of Figure 1; Figure 7 is a cross-sectional view taken along line VII-VII of Figure 1; Figure 8 is a plan view, partly in cross section, of the light emitting device shown in Figure 1 which is arranged on a vehicle body panel; Figure 9 is a perspective view of a light emitting device according to a first modification; Figure 10 is an exploded perspective view of the light emitting device shown in Figure 9; Figure 11 is a perspective view of a cover of the light emitting device shown in Figure 10, as seen from behind; Figure 12 is a cross-sectional view illustrating a procedure for installing a light guide body in a tubular portion of the cover; Figure 13 is a cross-sectional view taken along line XIII-XIII of Figure 9 before the cover is assembled in place; Figure 14 is a cross-sectional view taken along line XIV-XIV of Figure 9 after the cover is assembled in place; Figure 15 is a cross-sectional view taken along line XV-XV of Figure 9; Figure 16 is a plan view, partially in cross-section, of the light emitting device according to the first embodiment of the present invention which is arranged in a vehicle body panel; Figure 17 is an exploded perspective view of a light emitting device according to a second modification of the present invention; Figure 18 is a cross-sectional view of the light emitting device shown in Figure 17; Figure 19 is a plan view of a light emitting device according to a third modification of the present invention; Figure 20 is an exploded perspective view of a light emitting device according to a fourth modification of the present invention; and Figure 21 is a plan view of a case of the light emitting device shown in Figure 20. Description of Modalities
[0048] [0048] The light emitting devices according to the preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[0049] [0049] A light emitting device 10 according to an embodiment of the present invention is used to illuminate the passenger compartment of a vehicle. As shown in Figures 1 and 2, the light emitting device 10 includes a light emitting element 12 as a light source, a plate 14 having a rectangular shape in plan view with the light emitting element 12 mounted on the an electronic component 18 mounted on a surface (hereinafter also referred to as the "mounting surface") 16 of the plate 14 on which the light-emitting element 12 is mounted, the electronic component 18 being electrically connected to the light output 12 a pair of connecting terminals (terminals) 20a, 20b connected to the plate 14, a box (support member) 22 housing the plate 14, etc. in it, and a cover 124 mounted on the box 22.
[0050] [0050] The light emitting element 12 comprises an LED, for example, but can comprise an organic EL device or the like. The LED and the organic EL device can be of known technology. The light-emitting element 12 is located outside the longitudinal center of the plate 14 towards its end.
[0051] [0051] The electronic component 18, which serves to control the supply of electrical energy to the light emitting element 12, etc., comprises a resistor, a diode, or the like, for example. The electronic component 18 is positioned substantially in the transverse center of the plate 14, and located outside the longitudinal center of the plate 14 towards the other end thereof.
[0052] [0052] The plate 14 has a pair of hollow holes 26a, 26b defined at the same near its other end as the electronic component 18 along the longitudinal directions of the plate 14. The connection terminals 20a, 20b have ends inserted respectively in the hollow holes 26a, 26b, which can be spaced from each other by a desired distance. However, the distance between the hollow holes 26a, 26b should preferably be large enough to keep the connection terminals 20a, 20b out of contact with one another when the connection terminals 20a, 20b are inserted into the hollow holes 26a, 26b and locked in place. A conductor in a flat shape, for example, in the form of a leaf, is arranged on an inverse side 28 of the plate 14. The light-emitting element 12, the electronic component 18, and the connection terminals 20a, 20b are electrically connected to each other by the conductor to thereby produce a heat radiation effect.
[0053] [0053] As can be seen from Figures 2 and 7, the connection terminal 20a has opposite end faces formed as flat. However, the opposite ends of the connection terminal 20a are not limited to any shape, but can be in a tuned shape, for example. The opposed tuned ends of the connection terminal 20a allow one end of the connection terminal 20a to be easily inserted into the hollow hole 26a, and allow the other end of it to be mounted on an external connector to supply electrical energy, to be described later.
[0054] [0054] The connection terminal 20a is in the form of a thin metal rod (metal plate) that has a rectangular cross-sectional shape. The connection terminal 20a has an adhered section (clamped section) 30 (see Figure 7), which is welded to the plate 14 while being inserted into the hollow hole 26a of the plate 14, an arcuely curved section 32 contiguous to the adhered section 30 , and a conductor section 34 adjoining the curved section 32 and extending towards the other end of the connection terminal 20a.
[0055] [0055] The connection terminal 20a has a wall thickness T1 (see Figure 7) adjusted to such thickness in order to make the curved section 32 flexible. Because of this, the curved section 32 can be bent to adjust the positional relationship between the bonded section 30 and the conductor section 34. The conductor section 34 is connected to the external connector to supply electricity, not shown, so that the light-emitting element 12 can be supplied with electricity from outside. The connection terminal 20b, which is inserted in the hollow hole 26b, is identical in structure to the connection terminal 20a, and therefore will not be described in detail below.
[0056] [0056] As shown in Figure 3, the housing 22 has a housing body 36 which is wide and extends in one direction with the plate 14 housed therein, and a connector 38 which is narrow and connected to the housing body 36 The housing body 36 and the connector 38 are entirely made of a resin or similar.
[0057] [0057] As shown in Figure 5, the box body 36 has a bottom 40 which is substantially rectangular in shape as seen in the plane, a pair of first steps 42a, 42b disposed on the transversely opposite ends of the bottom 40, a pair of second steps 44a, 44b adjoining the first steps 42a, 42b respectively, a pair of side walls 46a, 46b adjoining the second steps 44a, 44b, a wall 48 arranged vertically on the bottom 40 and extending to positions close to the upper ends the side walls 46a, 46b, and a thick wall 50 (see Figure 2) arranged vertically on the bottom 40 in a confrontation relationship with the wall 48.
[0058] [0058] The first steps 42a, 42b extend along the side walls 46a, 46b and have ends held against wall 48 and the other ends held against wall 50. The first steps 42a, 42b have respective first vertical surfaces 43a, 43b contiguous to an internal surface (a surface that confronts the plate 14, a bottom surface) 40a of the bottom 40, and first upper surfaces 45a, 45b contiguous respectively to the first vertical surfaces 43a, 43b.
[0059] [0059] The width W1 of the first vertical surfaces 43a, 43b (the height of the first steps 42a, 42b) is approximately the same as the thickness T2 of the plate 14. When the plate 14 is placed on the first upper surfaces 45a, 45b, an appropriate gap S is defined between the plate 14 and the bottom 40. The heat generated by the light-emitting element 12 and the electronic component 18 is dissipated within the gap S, so that an increase in temperature in the light-emitting element 12 and the electronic component 18 can be made smaller than if the entire reverse side 28 of the plate 14 were kept in contact with the bottom 40.
[0060] [0060] The second steps 44a, 44b extend along the side walls 46a, 46b and have ends held against wall 48 and the other ends held against connector 38. The second steps 44a, 44b have respective second vertical surfaces 47a, 47b contiguous respectively to the first upper surfaces 45a, 45b, and to the second upper surfaces 49a, 49b contiguous respectively to the second vertical surfaces 47a, 47b. The width W2 of the second vertical surfaces 47a, 47b (the height of the second steps 44a, 44b) is greater than the thickness T2 of the plate 14. When the plate 14 is placed on the first upper surfaces 45a, 45b, the second upper surfaces 49a, 49b are positioned above the mounting surface 16 of the plate 14.
[0061] [0061] The distance between the second vertical surfaces 47a, 47b is essentially the same as the transverse width of the plate 14, thereby limiting the transverse movement of the plate 14.
[0062] [0062] As shown in Figure 2, the side wall 46a has a plurality of (two in Figure 2) mounting holes (second coupling portions) 52a, 52b that are spaced apart from each other by a predetermined distance, and the side wall 46b similarly has mounting holes (second coupling portions) 52c, 52d. The mounting holes 52a, 52b and the mounting holes 52c, 52d are in the form of complementary quadrangular openings in the form of the mounting teeth (first coupling portions) 70a, 70b and mounting teeth (first coupling portions) respectively. 70c, 70d of cover 24, to be described later.
[0063] [0063] Mounting holes 52a, 52b and mounting holes 52c, 52d are positioned slightly above the centers of the side walls 46a, 46b. Therefore, when the cover 24 is installed inside the box 22, the side walls 46a, 46b are elastically deformed outwardly by the mounting teeth 70a, 70b and the mounting teeth 70c, 70d to a lesser extent than if the mounting holes 52a, 52b and the mounting holes 52c, 52d were positioned below the centers of the side walls 46a, 46b. Consequently, the cover 24 can be installed inside the box 22 with less force.
[0064] [0064] The mounting holes 52a, 52b in the side wall 46a are positioned along the longitudinal directions of the housing 22 so that the distance between one end of the side wall 46a and the mounting hole 52a, the distance between the mounting hole 52a and the mounting hole 52b, and the distance between the mounting hole 52b and the other end of the side wall 46a are the same. The mounting hole 52c on the side wall 46b faces the mounting hole 52a, while the mounting hole 52d on the side wall 46b faces the mounting hole 52b. Consequently, the box 22 can hold the cover 24 in a better balanced way than if the mounting holes 52a, 52b and the mounting holes 52c, 52d were staggered along the longitudinal directions of the box 22.
[0065] [0065] The side walls 46a, 46b have respective fixing fingers 54a, 54b on the external surfaces positioned respectively between the mounting holes 52a, 52b and between the mounting holes 52c, 52d for coupling with the retaining portions 200a, 200b , to be described later, on a vehicle body panel P (see Figure 8). The fixing fingers 54a, 54b extend along the longitudinal directions of the housing 22, and include respective tuned portions 57a, 57b that are integrally formed with the bases 55a, 55b formed substantially in the form of a rectangular parallelepiped. Each of the tuned portions 57a, 57b is angled downwards and to form an upper end thereof.
[0066] [0066] The walls 48, 50 have such height that the box 22 and the cover 24 are level with each other when the cover 24 is mounted on the box 22 (see Figures 1 and 7).
[0067] [0067] Wall 50 is substantially T-shaped as seen in the plan and has a length that extends into connector 38. Wall 50 is a pair of placement grooves 56a, 56b defined substantially centrally on an upper surface and extending in longitudinal directions (see Figure 3). The placement grooves 56a, 56b have a width that is substantially the same as the width of the conductor sections 34 of the connection terminals 20a, 20b, and a depth which is substantially the same as the thickness T1 of the conductor sections 34 (see Figure 7)
[0068] [0068] As shown in Figure 1, the connector 38 is shaped like a hollow square prism that houses the conductor sections 34 of the connection terminals 20a, 20b in it. An external connector for supplying electrical power, not shown, can be inserted into the hollow body of connector 38. According to the present embodiment, connector 38 has a greater vertical thickness than the housing body 36. Connector 38 has a cutout rectangular 58 defined in a wall 57 thereof and having a width corresponding to the width of a covering extension 64 to be described later.
[0069] [0069] With the box 22 thus constructed, a space surrounded by the bottom 40, the first steps 42a, 42b, and second steps 44a, 44b, the side walls 46a, 46b, the wall 48, and the wall 50, and the cutout 58 on the connector 38 together make up a space (chamber) 59 within which the cover 24 can be mounted.
[0070] [0070] As shown in Figures 2 and 4, cover 24 is integrally formed of resin or the like, and has a main cover body 60 which is substantially rectangular in shape as seen in the plane, a pair of protrusions 62a, 62b which project downwardly from opposite transverse ends of the main cover body 60 along the longitudinal directions, and a cover extension 64 that has a reduced width and extends from one end (other end) of the main cover body 60.
[0071] [0071] The main cover body 60 has a lens (light guide) 66 on one end of it to diverge or converge the light emitted from the light emitting element 12. According to the present embodiment, lens 66 is constructed as a double convex lens. However, lens 66 can be of an appropriately selected type and shape. Lens 66 is circular (truly circular) as seen in the plane.
[0072] [0072] As shown in Figure 2, lens 66 is positioned between the mounting teeth 70a, 70c to be described later. Specifically, when the light emitting device 10 is mounted, the lens 66 is positioned between the mounting holes 52a, 52c in the directions towards the width of the cover 24.
[0073] [0073] As the mounting teeth 70a, 70c are positioned close to the lens 66, any positional displacement of the lens 66 with respect to the housing 22 is adequately suppressed, thereby making it possible to support the lens 66 stably.
[0074] [0074] The distance by which protrusions 62a, 62b project is determined depending on the height of the side walls 46a, 46b.
[0075] [0075] The protrusions 62a, 62b have respective edges 68a, 68b (see Figure 4). Edges 68a, 68b are of the same length and protrusions 62a, 62b, and the distance by which edges 68a, 68b project is approximately the same as the difference (W2 - T2) between the width W2 of the second vertical surfaces 47a, 47b and the T2 thickness of the plate 14 (see Figure 5).
[0076] [0076] The protrusions 62a, 62b have on their outer lateral surfaces the mounting teeth 70a, 70b and the mounting teeth 70c, 70d which are spaced from each other. The mounting teeth 70a, 70b, 70c, 70d can be mounted respectively within the mounting holes 52a, 52b, 52c, 52d. The distance by which the mounting teeth 70a, 70b and the mounting teeth 70c, 70d are spaced from each other is identical to the distance by which the mounting holes 52a, 52b and the mounting holes 52c, 52d are spaced apart from each other. others. The mounting teeth 70a, 70b, 70c, 70d are substantially in the form of a rectangular parallelepiped, and have progressively inwardly tuned lower end portions.
[0077] [0077] According to the present embodiment, as shown in Figure 5, the distance L1 from the end faces 69a, 69b from the edges 68a, 68b to the upper end faces of the mounting teeth 70a, 70b and the mounting teeth 70c , 70d is slightly greater than the distance L2 from the mounting surface 16 of the plate 14 to the upper ends of the mounting holes 52a, 52b and the mounting holes 52c, 52d when the plate 14 is placed on the first upper surfaces 45a, Box body 45b 36. The reasons for this will be described later.
[0078] [0078] A termination fastener 72 which projects downwards is disposed on the limit between the main cover body 60 and the cover extension 64 (see Figure 4). Terminal clip 72 has an end face 73 which is integrally joined to the lower end faces 69a, 69b of the edges 68a, 68b, thereby composing a flat surface.
[0079] [0079] The lower end face 73 of the terminal clamp 72 has a pair of recesses 74a, 74b defined therein that are spaced from each other along the transverse directions of the main cover body 60 by a predetermined distance which corresponds to the distance by which the placement grooves 56a, 56b in the wall 50 are spaced from each other.
[0080] [0080] A slot 76 for securing the external connector to supply electrical power to it is defined on a lower surface of the cover extension 64 in a region adjacent to the terminal fastener 72.
[0081] [0081] A procedure for assembling the light emitting device 10 in accordance with the present embodiment will be described below. First, the light-emitting element 12 and the electronic component 18 are installed on the surface 16 of the plate 14. The bonded sections 30 of the connection terminals 20a, 20b are inserted into the respective hollow holes 26a, 26b in the plate 14, and welded on plate 14.
[0082] [0082] Subsequently, the plate 14 with the light emitting element 12 etc. installed in it is introduced in box 22. At this time, as shown in Figure 5, the reverse side 28 of plate 14 is brought into contact with the first upper surfaces 45a, 45b, and side surfaces of plate 14 are brought into contact with the second vertical surfaces 47a, 47b, with the conductor sections 34 of the connection terminals 20a, 20b being accommodated within the respective slots 56a, 56b in the wall 50. The plate 14 and the connection terminals 20a, 20b are thus positioned inside from box 22.
[0083] [0083] Then, the cover 24 is mounted inside the box 22. Specifically, when the cover 24 approaches the box 22, the tip ends of the protrusions 62a, 62b of the cover 24 enter the box body 36 while the external surfaces of the protrusions 62a, 62b are in contact with the inner surfaces of the side walls 46a, 46b of the housing body 36, until the mounting teeth 70a, 70b and the mounting teeth 70c, 70d contact the side walls 46a, 46b.
[0084] [0084] When the cover 24 is pressed towards the bottom 40 of the box body 36, the side walls 46a, 46b are elastically deformed in directions away from each other, and by reaction forces of the side walls 46a, 46b, protrusions 62a, 62b are elastically deformed in directions from one another. In the above state, the protrusions 62a, 62b move further into the housing body 36.
[0085] [0085] Subsequently, the end faces 69a, 69b of the edges 68a, 68b are brought into contact with the mounting surface 16 of the plate 14, and the lower end faces of the protrusions 62a, 62b are brought into contact with the second surfaces upper 49a, 49b. As described above, as the distance L1 from the lower end faces 69a, 69b to the upper end faces of the mounting teeth 70a, 70b and the mounting teeth 70c, 70d is greater than the distance L2 from the mounting surface 16 of the plate 14 for the upper ends of the mounting holes 52a, 52b, 52c, 52d, the mounting teeth 70a, 70b, 70c, 70d in this state are not yet mounted within the mounting holes 52a, 52b, 52c, 52d.
[0086] [0086] When the cover 24 is additionally pressed towards the bottom 40, the housing body 36 and the cover 24 are slightly deformed, allowing the cover 24 to move further into the housing body 36 up to the mounting teeth 70a, 70b, 70c, 70d are mounted inside the mounting holes 52a, 52b, 52c, 52d (see Figure 6). At this time, the protrusions 62a, 62b and the side walls 46a, 46b that have been elastically deformed return to their respective original shapes. As a result, the cover 24 is mounted inside the box 22 while the end faces 69a, 69b of the edges 68a, 68b are pressing (against against) the mounting surface 16 of the plate 14. The end face 73 of the terminal clamp 72 is now trapped against the conductor sections 34 of the connection terminals 20a, 20b (see Figure 7).
[0087] [0087] As shown in Figure 8, the light emitting device 10 thus assembled is arranged in a predetermined position on the vehicle body panel P of a vehicle, not shown. Specifically, the light emitting device 10 is adjusted on the reverse side of the vehicle body panel P so that the lens 66 faces a window H defined on the vehicle body panel P, and the light emitting device 10 is moved towards the vehicle body panel P. The retaining portions 200a, 200b made of resin, which are formed on the reverse side of the vehicle body panel P, are brought into contact with the tuned portions 57a, 57b of the fixing fingers 54a, 54b of the light emitting device 10.
[0088] [0088] When light emitting device 10 is additionally pressed towards the vehicle body panel P, the light emitting device 10 moves towards the vehicle body panel P while the retaining portions 200a, 200b are being elastically deformed away from each other, until lens 66 is mounted within window H. At this time, the retaining portions 200a, 200b which have been elastically deformed return to their respective original shapes. As a consequence, the light emitting device 10 is gripped by the vehicle body panel P and the retaining portions 200a, 200b, whereby the light emitting device 10 is securely attached to the vehicle body panel P .
[0089] [0089] In accordance with the present embodiment, the cover 24 is mounted inside the box 22 while being held in topamento against the surface 16 of the plate 14, whereby the plate 14 is positioned and secured. Because of this, the plate 14 is held in position with reduced voltages acting on the lens 66, and thus the light emitting device 10 can be reduced in size and weight. Insofar as the lens 66 is arranged on the main cover body 60 while being prevented from moving in one direction to sandwich the plate 14, the distance between the light emitting element 12 and the lens 66 is kept constant regardless of the orientation of the light emitting device 10.
[0090] [0090] The LED device described in Japanese Patent Publication Open to Public Inspection Number 2009-239255 is designed to eliminate faults due to external forces applied when it is installed on an external connector, and to reduce its size. The LED device described has a box and a cover that mounts inside the cover. The LED device has a printed circuit board that supports a pump-shaped LED lamp as a light source in it, and connection terminals attached by the printed circuit board and the housing. The LED device is attached to an external device by fixing members inserted through mounting holes defined in the housing.
[0091] [0091] The box has a pair of facing side walls that have respective holes defined in them. The cover, which is fastened to a surface of the printed circuit board, has teeth to be mounted inside the holes in the side walls. The side walls are interconnected by a wall that has a lower end face. In a state where the lower end face touches the other surface of the printed circuit board, the teeth are mounted inside the holes, whereby the printed circuit board is attached. The box has a tubular portion for optical fiber, the tubular portion being inserted in the direction of the LED lamp.
[0092] [0092] However, the LED device described in Japanese Patent Publication Open to Public Inspection Number 2009-239255 is disadvantageous in that it cannot be reduced in size as desired because the pump-shaped LED lamp is used and the box has the mounting holes. In addition, as only the lower end face of the wall that interconnects the side walls that have the holes is kept in top position against the printed circuit board, when a plurality of LED devices are manufactured, the distance between the LED lamp and an opening of the tubular portion facing the printed circuit board tends to vary. As a result, as the amount of light guided into the optical fiber cannot be kept constant, LED devices are likely to have variations in quality.
[0093] [0093] According to the invention described in Japanese Patent Publication Open to Public Inspection Number 2010-083210, how a plate and lens are gripped in position using two parts, that is, a box and a connector, the emission device of light is likely to have a large overall size and a disadvantageously increased weight.
[0094] [0094] With the light emitting device 10 according to the present embodiment, in a structure in which the light emitted from the light emitting element 12 passes through lens 66, lens 66 and plate 14 can be stably secured in place with fewer parts than conventional techniques. Therefore, the light emitting device 10 can be reduced in size and weight. Even when a plurality of light emitting devices 10 are manufactured, it is prevented from varying in quality.
[0095] [0095] Specifically, with the light emitting device 10 according to the present embodiment, as the lower end faces 69a, 69b of the edges 68a, 68b of the cover 24 are pressed (topam) against the mounting surface 16 of the plate 14 while the reverse side 28 of the plate 14 is held in top position against the first upper surfaces 45a, 45b of the housing body 36, the plate 14 is reliably secured within the housing 22. At this time, the mounting teeth 70a , 70b, 70c, 70d of the cover 24 are mounted within the mounting holes 52a, 52b, 52c, 52d in the housing 36, the cover 24 is secure with respect to the housing 22.
[0096] [0096] According to the present embodiment, since lens 66 is formed on main cover body 60 of cover 24, there is no need for parts to attach lens 66 to box 22. Therefore, lens 66 and plate 14 are secured inside the box 22 with a smaller number of pieces than conventional techniques. The light emitting device 10 as a whole can effectively be reduced in size and weight.
[0097] [0097] According to the present embodiment, the plate 14 is pressed by the edges 68a, 68b of the cover 24 with the light emitting element 12 being disposed between the edges 68a, 68b, and the protuberances 62a, 62b are integral with the lens 66. Consequently, the distance between the light-emitting element 12 and the lens 66 is kept constant. Thus, when a number of (a plurality of) such light emitting devices 10 are manufactured, the degree of divergence or convergence of the light that has passed through lens 66 is prevented from varying, that is, the characteristics of light distribution and the quality of the light emitting device 10 is prevented from varying. Furthermore, as the mounting teeth 70a, 70b and the mounting teeth 70c, 70d on the protrusions 62a, 62b are mounted respectively within the mounting holes 52a, 52b and the mounting holes 52c, 52d which are defined respectively in the walls sides 46a, 46b, the plate 14 can be stably secured in position.
[0098] [0098] According to the present embodiment, with the cover 24 being mounted inside the box 22, the external side surfaces of the edges 68a, 68b of the cover 24 are kept in contact with the second vertical surfaces 47a, 47b of the box body 36 Therefore, the cover 24 and the plate 14 are suitably prevented from moving relative to each other in their transverse directions. The light-emitting element 12 is thus substantially attached to the center of the lens 66, so that the quality of the light-emitting device 10 is further prevented from varying.
[0099] [0099] In accordance with the present embodiment, moreover, the lower end face 73 of the terminal clamp 72 is secured in a top against the conductor sections 34 of the connection terminals 20a, 20b accommodated within the grooves 56a, 56b . Consequently, the connection terminals 20a, 20b are suitably attached within the housing 22.
[0100] [00100] As there is no need for parts to secure the connection terminals 20a, 20b, the light emitting device 10 as a whole can be effectively reduced in size and weight. As the connection terminals 20a, 20b are attached to the plate 14 by the adhered sections 30, the plate 14 is more stably secured in position by securing the connection terminals 20a, 20b.
[0101] [00101] Usually, box 22 has a dimensional tolerance. Therefore, when the plate 14 with the light emitting element 12, the connection terminals 20a, 20b etc. being mounted on it, it is positioned inside the housing 22, for example, the conductor sections 34 of the connection terminals 20a, 20b can be slightly raised out of the placement grooves 56a, 56b.
[0102] [00102] Even in this case, with the light emitting device 10 according to the present modality, as the connection terminals 20a, 20b have the respective curved sections 32, when the cover 24 is mounted inside the box 22, bending the curved sections 32, the connection terminals 20a, 20b can be secured without applying undue tension to the bonded sections 30. The bonded sections 30 are thus prevented from suffering a connection failure.
[0103] [00103] The end face face 73 of the terminal clamp 72 has the recesses pair 74a, 74b defined therein, so that the curved sections 32 of the connection terminals 20a, 20b are prevented from touching the cover 24, by means of this making it less difficult to mount the cover 24 inside the box 22. The light emitting device 10 is made more compact in its entirety than if the recesses 74a, 74b were not defined on the lower end face 73 of the terminal clamp 72, but a space is created between the curved sections 32 and the lower end face 73 to prevent the curved sections 32 from touching the lower end face 73.
[0104] [00104] According to the present modality, even more, as the electronic component 18 is disposed on the mounting surface 16 of the plate 14 on which the light emitting element 12 is mounted, the light emitting device 10 as a whole can suitably be made smaller in size and weight than if electronic component 18 were mounted on the reverse side 28 of plate 14.
[0105] [00105] According to the present modality, in a case where it is desired to reduce a shock applied to the conductor sections 34 in the adhered sections (stuck sections) 30, as the curved sections 32 are provided between the adhered sections 30 and the sections of conductor 34, when the connector for supplying electricity, not shown, is connected to the conductor sections 34, a shock acting on the adhered sections 30 can be appropriately reduced by the curved sections 32. The connection terminals are curved in the curved sections and then they extend into the conductor sections. As the connection terminals are spaced (lowered) in a direction away from the cover, the connection terminals contribute to a reduction in the size of the light emitting device.
[0106] [00106] According to the present invention, the mounting holes 52a through 52d are hollow holes, so it is possible to easily confirm that the cover 24 is reliably mounted inside the box 22. The box body 36 is made compact in the their height directions (vertical directions) with respect to connector 38.
[0107] [00107] The electronic component 18 is disposed between the light emitting element 12 and the hollowed holes 26a, 26b (terminal clamping regions) and has its longitudinal directions aligned with the directions along which the connection terminals 20a, 20b are juxtaposed.
[0108] [00108] Box 22 and cover 24 are narrower on the connector side than on the lens side. The recesses 74a, 74b are formed as areas of clearance in positions that face the curved sections 32 of the connection terminals 20a, 20b. Slack areas can be chamfered.
[0109] [00109] The present modality is not limited to the structural details described above. A damping member can be interposed between the cover 24 and the plate 14 while a portion of the cover 24 is attached to the surface 16 of the plate 14. The edges 68a, 68b of the cover 24 can comprise damping members. First Modification
[0110] [00110] The light emission device 10A according to a first modification will be described below with reference to Figures 9 to 16. In the present modification, parts which have identical or similar functions and effects to those according to the above modality are denoted by identical reference characters, and will not be described in detail below. This is also true for a third modification and a fourth modification to be described later.
[0111] [00111] As shown in Figures 9 to 11, the light emitting device 10A according to the first modification has a cover 78 instead of the cover 24 of the light emitting device 10 described above. The cover 78 is integrally formed of resin or similar by injection molding, and has a tubular portion 80 integrally formed with a main cover body 77 and on which a light guide body (light guide) 79 can be mounted.
[0112] [00112] The tubular portion 80 is substantially in the form of a hollow cylinder positioned near one end of the main cover body 77. The interior (inner hole) of the tubular portion 80 is open on a lower end face of the main cover body 77. The tubular portion 80 has four thick regions 82a, 82b, 82c, 82d spaced circumferentially from one another. The thick regions 82a, 82b, 82c, 82d extend fully along the axial directions of the tubular portion 80 and have substantially identical circumferential lengths.
[0113] [00113] The thick region 82a and the thick region 82c are arranged along the longitudinal directions of the main covering body 77, while the thick region 82b and the thick region 82d are arranged along the transverse directions of the main covering body 77 .
[0114] [00114] The thick region 82b has a first stop 86a on an end portion of its inner circumferential surface, and the thick region 82d has a first stop 86b on a lower end portion of its inner circumferential surface, the first stop 86b facing the first stop 86a (see Figure 13). The thick region 82b has a coupling groove 88 defined at an upper end portion of its inner circumferential surface, the coupling groove 88 extending axially from the tubular portion 80 and being opened on an upper end face of the tubular portion 80. The groove coupling 88 may not be opened at the upper end face of the tubular portion 80. In other words, an upper end of the coupling groove 88 may be positioned slightly under the upper end face of the tubular portion 80. Each of the first stops 86a, 86b is substantially in the form of a rectangular parallelepiped and has an upper end face formed in the flat direction.
[0115] [00115] As shown in Figure 12, the thick region 82a has a groove 90a defined on its inner circumferential surface and extending axially from the tubular portion 80. The groove 90a extends from one position and is slightly under the upper end of the tubular portion 80 to the lower end of the tubular portion 80, whereby a second stop 92a is formed on an upper end portion of the inner circumferential surface of the thick region 82a for topping against (coupling with) a convexity 96a of the light guide body 79 to be described later.
[0116] [00116] The thick region 82c has a groove 90b defined on its internal circumferential surface. The groove 90b is identical in shape to the groove 90a and faces the groove 90a. Thus, a second stop 92b is formed on an upper end portion of the inner circumferential surface of the thick region 82c for topping against (coupling with) a convexity 96b of the light guide body 79 to be described later. Each of the second stops 92a, 92b is in a tapered shape that is progressively thinner towards its upper end and has a lower end face formed as flat.
[0117] [00117] The light guide body 79 is transparent and entirely constructed of a resin material. As shown in Figures 10, 12, and 13, the light guide body 79 has a cylindrical main light guide body 94, a pair of convexities 96a, 96b formed on an outer circumferential surface of the main light guide body 94 and insertable respectively in the grooves 90a, 90b described above, and a coupling projection 98 in substantially rectangular parallelepiped arranged on the outer circumferential surface of the main light guide body 94 and extending axially from the main light guide body 94.
[0118] [00118] The main light guide body 94 has an outer diameter that corresponds to the inner diameter of the tubular portion 80. Each of the convexities 96a, 96b is substantially in the form of a rectangular parallelepiped. Each of the convexities 96a, 96b has a finely tuned lower end portion that is progressively thinner down and an upper end face formed as flat. Convexities 96a, 96b are adjusted to an insertable size in the grooves 90a, 90b.
[0119] [00119] The distance L3 from the lower end face of the main light guide body 94 to the upper end faces of the convexities 96a, 96b is substantially the same as the distance L4 from the upper end faces of the first stops 86a, 86b for the lower end faces of the second stops 92a, 92b, for reasons to be described later.
[0120] [00120] Coupling projection 98 has a width (a length along a direction perpendicular to the axial and radial directions of the main light guide body 94) which is substantially the same as the width of the coupling groove 88. When the coupling projection 98 is inserted in the coupling groove 88, the coupling projection 98 is maintained in contact with a pair of side surfaces of the coupling groove 88, so that the light guide body 79 is reliably positioned with respect to to the tubular portion 80 in the circumferential directions of the tubular portion 80. The light guide body 79 is thus prevented from being mounted wrongly within the tubular portion 80. Furthermore, the light guide body 79 which is mounted within the portion tubular 80 is adequately prevented from rotating in the circumferential directions of the tubular portion 80.
[0121] [00121] In accordance with the present modification, to mount the light emitting device 10A, the light guide body 79 is mounted on the tubular portion 80. Specifically, as shown in Figure 12, the light guide body 79 is adjusted in orientation with respect to the cover 78 so that the coupling projection 98 can be inserted into the coupling groove 88, and then it is moved into the tubular portion 80. So, despite the outer circumferential surface of the main light guide body 94 and the inner circumferential surface of the tubular portion 80 are secured in contact with each other, the tapered surfaces of the convexities 96a, 96b are brought into contact with the surfaces of the second stops 92a, 92b.
[0122] [00122] Then, when the light guide body 79 is pressed towards the main cover body 77, the light guide body 79 is further moved into the tubular portion 80 while the thick regions 82a, 82c are elastically deformed in directions away from each other (radially out of the tubular portion 80), until the lower end face of the main light guide body 94 touches the upper end faces of the first stops 86a, 86b. At this time, the thick regions 82a, 82c that have been elastically deformed return to their respective original shapes, and the coupling projection 98 is disposed within the coupling groove 88 and the convexities 96a, 96b are disposed within the grooves 90a, 90b.
[0123] [00123] As described above, the distance L3 from the lower end face of the main light guide body 94 to the upper end faces of the convexities 96a, 96b is substantially the same as the distance L4 from the upper end faces of the first stops 86a, 86b for the lower end faces of the second stops 92a, 92b. Therefore, the top end face of the convexity 96a comes up against the bottom end face of the second stop 92a, and the top end face of the convexity 96b comes up against the bottom end face of the second stop 92b. As a result, the light guide body 79 is positioned and secured within the tubular portion 80 (see Figure 15). At this time, the main light guide body 94 has a projecting portion from the tubular portion 80.
[0124] [00124] As shown in Figure 16, the light emitting device 10A so assembled is disposed in a predetermined position on the vehicle body panel P of a vehicle, not shown. Specifically, the light emitting device 10A is adjusted (in a position indicated by the colon and dash lines in Figure 16) on the reverse side of the vehicle body panel P so that an opening of the remote tubular portion 80 of the plate 14 is oriented vertically downwards and a window H defined in the vehicle body panel P faces the main light guide body 94, and the light emitting device 10A is moved towards the vehicle body panel P. Then , the retaining portions 202a, 202b made of resin provided on the reverse side of the vehicle body panel P are brought into contact with the tuned portions 57a, 57b of the holding fingers 54a, 54b of the light emitting device 10A.
[0125] [00125] When the light emitting device 10A is additionally pressed towards the vehicle body panel P, the light emitting device 10A moves towards the vehicle body panel P while the retaining portions 202a, 202b are being elastically deformed in directions away from each other, until the tubular portion 80 is brought into the top against the reverse side of the vehicle body panel P and a portion of the main light guide body 94 is mounted within window H and exposed inside the vehicle's passenger compartment. At this time, the retaining portions 202a, 202b which have been elastically deformed return to their respective original shapes. As a consequence, the light emitting device 10A is gripped by the vehicle body panel P and the retaining portions 202a, 202b, and thus the light emitting device 10A is securely attached to the vehicle body panel P.
[0126] [00126] In accordance with the light emitting device 10A of the present modification, as the lower end face of the main light guide body 94 is fixed in a stopper against the end faces of the first stops 86a, 86b while the body of light guide 79 is mounted within the tubular portion 80, the movement of the light guide body 79 towards the plate 14 is suppressed (prevented). The light guide body 79 is thus positioned within the tubular portion 80.
[0127] [00127] Furthermore, insofar as the upper end faces of convexities 96a, 96b, in the above state, are fixed in topamento against the lower end faces of the second stops 92a, 92b, the movement of the light guide body 79 moving away from plate 14 is suppressed (prevented). Therefore, for example, even if the light emitting device 10A is oriented so that the opening of the remote tubular portion 80 of the plate 14 is oriented vertically downwards, the light guide body 79 is not moved in position with respect to tubular portion 80. The distance between the light-emitting element 12 and the light-guide body 79 is thus kept constant regardless of the orientation of the light-emitting device 10A.
[0128] [00128] According to the present modification, as the light guide body 79 is positioned and secured within the tubular portion 80 using the first stops 86a, 86b and the second stops 92a, 92b, it is not necessary to form holes in the wall of the tubular portion 80 for holding the light guide body 79. Consequently, the light emitted from the light emitting element 12 is free from problems of escape through such holes. Consequently, the quality of the light emitting device 10A is increased without involving an increase in the number of parts used.
[0129] [00129] According to the present embodiment, as the convexities 96a, 96b capable of bumping against the second stops 92a, 92b are integrally formed as the external surface of the main light guide body 94, when the light guide body 79 is inserted in the tubular portion 80, the convexities 96a, 96b are pressed against the second stops 92a, 92b, thereby thick regions 82a, 82c are bent radially out of the tubular portion 80. The light guide body 79 can thus easily be inserted into the tubular portion 80.
[0130] [00130] The light guide body 79 is pressed towards the main cover body 77 while the tuned surfaces of the convexities 96a, 96b of the light guide body 79 are kept in contact with the tuned surfaces of the second stops 92a, 92b . Therefore, the thick regions 82a, 82c can easily be bent radially out of the tubular portion 80, so that the light guide body 79 can more easily be inserted into the tubular portion 80.
[0131] [00131] The first stops 86a, 86b are arranged in a confronting relationship with each other along the transverse directions of the main cover body 77, and the second stops 92a, 92b are arranged in a confronting relationship with each other along the directions. of the main cover body 77. Therefore, the light guide body 79 can be positioned and secured within the tubular portion 80 in a better balanced way than, for example, being a first stop 86a and a second stop 92a were provided (i.e., the first stop 86b and the second stop 92b are omitted). When the cover 78 is to be formed by injection molding, a core disposed within the tubular portion 80 may be composed of separate members of adequate size for easy removal of the core from the tubular portion.
[0132] [00132] With the light emitting device 10A according to the present modification, the protrusions 62a, 62b of the cover 78 press the mounting surface 16 of the plate 14 with the light emitting element 12 being disposed between the protrusions 62a, 62b, and the mounting teeth 70a, 70b and the mounting teeth 70c, 70d arranged respectively on the protrusions 62a, 62b are mounted respectively within the mounting holes 52a, 52b and the mounting holes 52c, 52d defined respectively in the side walls 46a, 46b. Therefore, the distance between the light emitting element 12 and the light guide body 79 is kept constant.
[0133] [00133] According to the present modification, with the cover 78 being mounted inside the box 22, the external side surfaces of the edges 68a, 68b of the cover 78 are maintained in contact with the second vertical surfaces 47a, 47b of the box body 36 Therefore, the optical geometric axis of the light emitting element 12 is positioned on the geometric axis of the tubular portion 80.
[0134] [00134] In accordance with the present modification, as the coupling groove 88 and the coupling projection 98 function as a rotation limiter, the light guide body 79 which is mounted within the tubular portion 80 is suitably prevented from rotating in the circumferential directions of the tubular portion 80.
[0135] [00135] According to the present modification, the mounting tooth 70a, the mounting tooth 70c, the thick region 82b, and the thick region 82d are arranged side by side in the direction in the width direction of the emission device 10B light. The first stops 86a, 86b are arranged in positions that face the thick regions 82b, 82d. Second Modification
[0136] [00136] A 10B light emitting device according to the second modification will be described below with reference to Figures 17 and 18. In the present modification, the parts which have identical or similar functions and effects to those according to the first modification are denoted by identical reference characters and will not be described in detail below.
[0137] [00137] As shown in Figures 17 and 18, the light emitting device 10B according to the second modification has a cover 100 and a light guide body 102 which are different in structure from the cover 78 and the guide body 79 above described. Specifically, cover 100 has a tubular portion 104.
[0138] [00138] The tubular portion 104 has a second stop 106a projecting from an upper end of an inner circumferential surface of the thick region 82a, and a second stop 106b projecting from an upper end of an internal circumferential surface of the thick region 82c. Each of the second stops 106a, 106b is in a tapered shape that is progressively thinner towards its upper end. The tubular portion 104 is not provided with the grooves 90a, 90b described above. The light guide body 102 is not provided with the convexities 96a, 96b described above.
[0139] [00139] With the light emitting device 10B according to the present modification, in a state where the light guide body 102 is mounted within the tubular portion 104, the lower end face of the main light guide body 94 is topped against the top end faces of the first stops 86a, 86b, and the top end face of the main light guide body 94 is topped against the bottom end faces of the second stops 106a, 106b, for example means that the light guide body 102 is positioned and secured within the tubular portion 104.
[0140] [00140] Still, as it is not necessary to provide the convexities 96a, 96b described above, on the external circumferential surface of the main light guide body 94, the light guide body 102 is of a simpler structure. As a result, the 10B light emitting device can be manufactured at a reduced cost. Third Modification
[0141] [00141] A 10C light emitting device according to a third modification will be described below with reference to Figure 19. As shown in Figure 19, the 10C light emitting device according to a third modification has a cover 110 which is different in structure of the cover 24 described above. The cover 110 has a lens 112 formed therein and which is elliptically shaped as seen in plan. Lens 112 has a larger geometrical axis that extends along the longitudinal direction of the cover 110.
[0142] [00142] In the present modification, when the light emitting device 10C is mounted, lens 112 is positioned between the mounting tooth 70a and the mounting tooth 70c, and positioned between the fixing finger 54a and the fixing finger 54c . In a case where it is desired to prevent lens 112 from being moved into position and to increase the support stiffness for lens 112, such as mounting tooth 70a, mounting tooth 70c, fixing finger 54a, and fixing finger 54c are positioned in the vicinity of lens 112, lens 112 is suitably prevented from being moved in position with respect to housing 22 is also suitably prevented from being moved in position with respect to vehicle body panel P. In other words, stiffness support for lens 112 is increased.
[0143] [00143] Furthermore, as the light emission device 10C according to the present modification has lens 112 which is elliptical in shape when viewed in the plane, for example, in a case where the light emission device 10C is used as a light emitting device to illuminate a vehicle door pocket, it can illuminate the door pocket along its shape by aligning the larger geometric axis of lens 112 with the direction in which the door pocket extends.
[0144] [00144] According to the present modification, moreover, since the lens 112 is elliptical in shape when viewed in the plane, the light emitting device 10C can be made compact in its direction in the width direction. Fourth Modification
[0145] [00145] A 10D light emitting device according to a fourth modification will be described below with reference to Figures 20 and 21. As shown in Figure 20, the 10D light emitting device according to a fourth modification has connection terminals 120a, 120b and a housing 122 which are different in structure from the connection terminals 20a, 20b and the housing 22 described above.
[0146] [00146] Specifically, the connection terminal 120a has the bonded section 30, the curved section 32, and a conductor section 124. The conductor section 124 extends from the other end of the curved section 32 in a direction away from the bonded section 30, it is folded substantially 90 degrees in its direction in the direction of width, it is additionally substantially folded 90 degrees, and extends in the direction away from the bonded section 30. In other words, the conductor section 124 includes a folded portion 126 formed therein.
[0147] [00147] According to the present modification, a round chamfered portion 128 is disposed between the other end of the conductor section 124 (i.e., remote from the bonded section 30) and the folded portion 126. The conductor section 124 is substantially the same width in its entirety. The connection terminal 120b is identical in structure to the connection terminal 120a, and this will not be described in detail below.
[0148] [00148] As shown in Figure 21, the housing 122 has a wall 130 disposed between the housing body 36 and the connector 38. The wall 130 has, on its upper surface, a placement groove 132a within which the section of conductor 124 of connection terminal 120a is placed, and a placement groove 132b into which conductor section 124 of connection terminal 120b is placed.
[0149] [00149] The placement groove 132a includes a folded groove portion 134 in a way that corresponds to the shape of the folded portion 126 of conductor section 124. The placement groove 132b is identical in structure to the placement groove 132a.
[0150] [00150] According to the present modification the hollow holes 26a, 26b in the plate 14 are moved in position to one side of the center in the width direction of the plate 14, so that the other ends of the connection terminals 120a, 120b are symmetrically arranged in the directions in the width direction with respect to the geometric axis of the connector 38.
[0151] [00151] With the 10D light emitting device according to the present modification, the connection terminals 120a, 120b have the respective folded portions 126, and the placement slots 132a, 132b have the respective folded groove portions 134 in ways that correspond to the shapes of the folded portions 126. In a case where it is desired to minimize damage to the adhered sections (stuck sections) 30, as the folded portions 126 stub against the side wall surfaces of the folded groove portions 134, that is, the su sidewall profiles act as load receiving portions, when the connector, not shown, is connected to the other ends of the conductor sections 124 of the connection terminals 120a, 120b, it is possible to prevent excessive tension from being applied to the adhered sections 30. Therefore, adhered sections 30 are properly prevented from being damaged.
[0152] [00152] According to the present modification, each of the connection terminals 120a, 120b can be provided with a plurality of folded portions 126. In this case, folding the folded portions 126 in one direction, the plural folded portions 126 contribute to make the compact 10C light emitting device in the wide direction directions.
[0153] [00153] The present invention is not limited to the above modalities, but can employ several provisions without departing from the scope of the invention. The light emitting devices according to the present invention are not limited to an application for illuminating the passenger compartment of a vehicle.
[0154] [00154] For example, the light emitting devices 10, 10A through 10D can incorporate a plurality of light emitting elements 12 mounted on the plate 14.
[0155] [00155] The light emitting device 10, 10A through 10D can be arranged so that the distance L1 from the lower end faces 69a, 69b from the edges 68a, 68b to the upper end faces of the mounting teeth 70a, 70b, 70c, 70d is the same as the distance L2 from the mounting surface 16 of the plate 14 of the plate 14 to the upper ends of the mounting holes 52a, 52b, 52c, 52d. In this case, the plate 14 is not essentially pressed by the edges 68a, 68b, but can be secured with respect to the housing body 36 by contact resistance between the lower end faces 69a, 69b of the edges 68a, 68b and the mounting surface 16 from plate 14.
[0156] [00156] Instead of mounting the mounting teeth 70a, 70b, 70c, 70d, mounting holes can be defined in the protrusions 62a, 62b of the covers 24, 78, 100, 110, and instead of the mounting holes 52a, 52b , 52c, 52d, mounting teeth can be provided on the side walls 46a, 46b of the housing body 36. In this case, the cover 24 can also be easily mounted on the housing 22.
[0157] [00157] The numbers, positions, and shapes of the mounting holes 52a through 52d, the mounting teeth 70a through 70d, and the holding fingers 54a, 54b can be changed accordingly.

权利要求:
Claims (16)
[0001]
Light emitting device (10, 10A to 10D) characterized by comprising: a plate (14) that secures one end of a connection terminal (20a, 20b, 120a, 120b) and on which an electronic component (18) is mounted; a light-emitting element (12) mounted on a surface (16) of the plate (14); a support member (22, 122) on which the plate (14) is placed; and a cover (24, 78, 100, 110) positioning and securing the plate (14) being mounted on the support member (22, 122) while topping against the surface (16) of the plate (14); characterized by the fact that the cover (24, 78, 100, 110) has a main cover body (60) that covers the surface (16) of the plate (14); the cover (24, 78, 100, 110) having a pair of protrusions (62a, 62b) positioned so that the light emitting element (12) is interposed between the protrusions (62a, 62b), and the protrusions (62a, 62b) being integrally formed with the main cover body (60); the protrusions (62a, 62b) include edges (68a, 68b) that come up against the surface (16) of the plate (14), and first coupling portions (70a through 70d); the support member (22, 122) has a chamber (59) defined therein to accommodate the plate (14) and the cover (24, 78, 100, 110), and also has second coupling portions (52a through 52d) for coupling with the first coupling portions (70a to 70d), and the first coupling portions (70a to 70d) couple with the second coupling portions (52a to 52d) to thereby position and secure the plate (14) with the cover (24, 78, 100, 110); and a light guide (66, 79, 102, 112) to pass through it the light emitted from the light emitting element (12) is arranged on the main cover body (60) while being prevented from moving along a direction to sandwich the plate (14).
[0002]
Light-emitting device (10, 10A to 10D) according to claim 1, characterized in that the support member (22, 122) is integrally formed of a resin material; and the cover (24, 78, 100, 110) is integrally formed of a resin material.
[0003]
Light emitting device (10, 10A to 10D) according to claim 1, characterized in that the first coupling portions (70a to 70d) comprise mounting teeth that have tuned surfaces formed on them; and the second coupling portions (52a through 52d) comprise mounting holes into which the first coupling portions (70a through 70d) are mounted.
[0004]
Light emitting device (10, 10A to 10D) according to claim 1, characterized in that the chamber (59) is defined in the support member (22, 122) by a wall, the wall including: a bottom surface (40a); and a pair of steps (42a, 42b) that rise from the bottom surface (40a); and the plate (14) has another surface (28) spaced from the bottom surface (40a) and placed on the upper surfaces of the steps (42a, 42b).
[0005]
Light emitting device (10, 10A to 10D) according to claim 1, characterized in that the connection terminal (20a, 20b, 120a, 120b) includes an attached section (30) connected to the plate (14) , and a conductor section (34, 124) adjoining the adhered section (30) and extending parallel to the surface (16) of the plate (14): e the cover (24, 78, 100, 110) has a terminal clamp (72) that secures the conductor section (34, 124).
[0006]
Light emitting device (10, 10A to 10D) according to claim 1, characterized by the fact that the electronic component (18) is electrically connected to the light emitting element (12) and mounted on only the surface ( 16) of the plate (14).
[0007]
Light-emitting device (10, 10C, 10D) according to claim 1, characterized in that the light guide (66, 112) comprises a lens for diverging or converging the light emitted from the light-emitting element ( 12), the lens being integrally formed with the main cover body (60) in relation to the light emitting element (12).
[0008]
Light emitting device (10A, 10B) according to claim 1, characterized in that the light guide (79, 102) comprises a light guide body for guiding the light emitted from the light emitting element (12); the main cover body (60) has a tubular portion (80, 104) within which the light guide (79, 102) is mounted; and the tubular portion (80, 104) has, on its internal surface: a first stop (86a, 86b) to bump against the light guide (79, 102) to thereby prevent the light guide (79, 102) from moving in one direction of the plate (14); and a second stop (92a, 92b, 106a, 106b) to bump into the light guide (79, 102) which is attached to the top stop against the first stop (86a, 86b), thereby preventing the light guide light (79, 102) move in the direction away from the plate (14).
[0009]
Light emitting device (10A, 10B) according to claim 8, characterized in that the tubular portion (80, 104) is integrally formed of a resin material.
[0010]
Light emitting device (10A) according to claim 9, characterized by the fact that the light guide (79) has: a main light guide body (94); and a convexity (96a, 96b) to bump against the second stop (92a, 92b), the convexity being integrally formed with an external surface of the main light guide body (94), the convexity (96a, 96b) being attached to the top against the second stop (92a, 92b) to thereby prevent the light guide (79) from moving in a direction away from the plate (14).
[0011]
Light emitting device (10A) according to claim 10, characterized in that at least one of the second stop (92a, 92b) and the convexity (96a, 96b) has a tuned surface formed on it.
[0012]
Light emitting device (10A) according to claim 11, characterized in that a speed limiter (88, 98) is formed on the contact surfaces of the tubular portion (80) and the main light guide body ( 94).
[0013]
Light emitting device (10A, 10B) according to claim 8, characterized in that the first stop (86a, 86b) comprises two first stops arranged in relation to each other; and the second stop (92a, 92b, 106a, 106b) comprises two second stops arranged in relation to each other.
[0014]
Light emitting device (10A, 10B) according to claim 5, characterized in that a curved section is arranged between the bonded section (30) and the conductor section (34, 124).
[0015]
Light emitting device (10A, 10B) according to claim 1, characterized in that at least any of the first coupling portions (70a to 70d) or the second coupling portions (52a to 52d) are arranged so to interpose the light guide (66, 79, 102, 112) between them.
[0016]
Light emitting device (10A, 10B) according to claim 5, characterized in that the conductor section (124) includes a folded portion (126); the support member (122) has a folded groove portion (134) in a way that corresponds to a shape of the folded portion (126); and the folded portion (126) is arranged for topping against a side groove surface of the folded groove portion (134).

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法律状态:
2018-03-27| B15K| Others concerning applications: alteration of classification|Ipc: B60Q 3/00 (2017.01), F21V 17/00 (2006.01), F21V 17 |

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2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-10-01| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-04-07| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2020-06-30| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 09/05/2012, 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/JP2012/061924|WO2013168253A1|2012-05-09|2012-05-09|Light-emitting device|

---