JP2016040779A - Lighting emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device which maintains a constant distance between a light emitting element and a transparent material regardless of a direction of the light emitting device, prevents light from the light emitting element from leaking to the outside, and enables improvement of the quality without increasing the number of components.SOLUTION: A light emitting device 10 includes: a substrate 14 on which a light emitting element 12 is mounted; a case 22 in which the substrate 14 is disposed; and a cover part 24 which is attached to the case 22 while contacting with a mounting surface 16 of the substrate 14 to position and hold the substrate 14. The cover part 24 includes a cylindrical part 80 in which a transparent material 25, to which the light emitted from the light emitting element 12 is guided, may be attached. First stopper parts 86a, 86b, which block movement of the transparent material 25 to the side where the substrate 14 is positioned, and second stopper parts 92a, 92b, which block movement of the transparent material 25 to the opposite side of the side where the substrate 14 is positioned, are formed on an inner surface of the cylindrical part 80.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a light emitting device having a substrate on which a light emitting element is mounted.

  2. Description of the Related Art Conventionally, light emitting devices including LEDs (Light Emitting Diodes) have been widely used for lighting in vehicle interiors.

  As this type of light emitting device, a case portion and a cover portion fitted to the case portion are provided, and a bullet-type LED lamp and a printed circuit board that supports connection terminals are arranged in a chamber formed between the case portion and the cover portion. In addition, a technical idea has been proposed in which the printed circuit board is sandwiched between the case portion and the cover portion (see Patent Document 1).

  Further, in this Patent Document 1, a cylindrical portion in which a rod-shaped light guide for guiding light emitted from the LED lamp can be inserted is provided in the case portion, and the guide is provided on the inner surface of the cylindrical portion. The technical idea of keeping the distance between the light guide and the LED lamp constant by forming a protrusion for positioning the light body is also disclosed.

JP 2009-239255 A

  However, Patent Document 1 described above does not describe at all how the light guide is positioned by the protrusions. Therefore, for example, when the light guide is positioned inside the cylindrical portion along the vertical direction by bringing the end face of the light guide on the LED lamp side into contact with the protrusion, the cylindrical portion is brought into contact with the cylindrical portion by the action of gravity. On the other hand, the light guide body may move to increase the distance between the light emitting element and the light guide body, or the light guide body may come out of the cylindrical portion.

  As another method, for example, a mounting hole is formed in the wall portion of the cylindrical portion and a mounting claw that fits into the mounting hole is provided on the outer peripheral surface of the light guide, and the mounting claw is formed in the mounting hole. It is also conceivable that the light guide is positioned and held inside the cylindrical part by fitting. However, in this case, the light emitted from the LED lamp may leak to the outside through the mounting hole, and the quality of the light emitting device may deteriorate. In addition, if the mounting hole is surrounded by another part in order to prevent the light leakage, there is a problem that the number of parts increases.

  The present invention has been made in consideration of such problems, and can keep the distance between the light emitting element and the light guide constant regardless of the direction of the light emitting device, and light from the light emitting element is externally transmitted. It is an object of the present invention to provide a light-emitting device that can prevent leakage and improve the quality without increasing the number of components.

  The present invention includes a substrate that holds one end of a connection terminal and on which an electronic component is mounted, a light-emitting element that is mounted on one surface of the substrate, a support member on which the substrate is placed, The present invention relates to a light emitting device comprising: a cover portion that positions and holds the substrate by being attached to the support member in contact with one surface.

  The cover section includes a cover section main body that covers the light emitting element, and a cylindrical section that is provided in the cover section main body and in which a light guide that guides light emitted from the light emitting element can be mounted. The inner surface of the cylindrical portion is in contact with the light guide and prevents the light guide from moving in the direction toward the substrate, and the light guide is used as the first stopper. A second stopper portion is provided that is in contact with the light guide and prevents movement of the light guide in a direction opposite to the side on which the substrate is located. Item 1).

  In this case, it is preferable that the cylindrical portion is integrally formed of a resin material.

  Furthermore, the light guide has a light guide body, and a convex portion that is integrally formed on the outer surface of the light guide body and can come into contact with the second stopper portion. It is preferable to prevent the light guide from moving in the direction opposite to the side where the substrate is located by bringing the convex part into contact with the part (Claim 3).

  Furthermore, it is preferable that a taper surface is formed on at least one of the second stopper portion and the convex portion.

  A locking groove extending in the axial direction of the cylindrical portion is formed on the inner surface of the cylindrical portion, and each of the pair of groove side surfaces of the locking groove is formed on the outer surface of the light guide body. It is preferable that a locking projection that can be inserted into the locking groove is formed in a state of being in contact with.

  Further, it is preferable that two first stopper portions are provided so as to face each other, and two second stopper portions are provided so as to face each other.

  Furthermore, the cover part main body has a base part that covers one surface of the substrate, and a pair of protrusions that are positioned so as to sandwich the light emitting element and that are formed integrally with the base part. The pair of projecting portions each include a projecting portion that abuts on one surface of the substrate and a first engaging portion, and the support member is a chamber in which the substrate and the cover portion can be disposed. And a second engagement portion that engages with the first engagement portion is provided, and the substrate is formed by the cover portion by engaging the first engagement portion with the second engagement portion. Is preferably positioned and held (claim 7).

  Furthermore, it is preferable that the supporting member is integrally formed of a resin material, and the cover portion is integrally formed of a resin material.

  According to the first aspect of the present invention, the substrate is positioned and held by mounting it on the support member in a state where the cover portion is in contact with one surface of the substrate. Thereby, the space | interval of the light emitting element mounted in the one surface of the said board | substrate and the cylinder part of the said cover part becomes fixed. Further, since the light guide is brought into contact with the first stopper portion of the tube portion to prevent the light guide body from moving on the side where the substrate is located, the light guide is placed inside the tube portion. Can be positioned.

  Further, in a state where the light guide is in contact with the first stopper portion, the light guide is brought into contact with the second stopper portion to prevent movement of the light guide in the direction opposite to the side where the substrate is located. Therefore, for example, even when the orientation of the light emitting device is set so that the opening on the side opposite to the side where the substrate is located in the cylindrical portion is directed vertically downward, The position of the light guide does not shift. Accordingly, the distance between the light emitting element and the light guide can be kept constant regardless of the direction of the light emitting device.

  In the invention according to claim 1, since the light guide is positioned and held by the first stopper portion and the second stopper portion provided on the inner surface of the tube portion, the light guide is placed on the wall portion of the tube portion. There is no need to form holes for holding. Therefore, there is no problem that light emitted from the light emitting element leaks to the outside through the hole. Therefore, the quality of the light emitting device can be improved without increasing the number of parts.

  According to the invention which concerns on Claim 2, since the cylinder part is formed with the resin material, when inserting a light guide into the inside of this cylinder part, this cylinder part can be bent to radial direction outward. Since it can do, the said light guide can be easily inserted in the inside of the said cylinder part.

  According to the third aspect of the present invention, since the convex portion that can come into contact with the second stopper portion is integrally formed on the outer surface of the light guide body, when the light guide is inserted into the cylindrical portion, In addition, the cylindrical portion can be bent outward in the radial direction by pressing the convex portion against the second stopper portion. Thereby, the said light guide can be more easily inserted in the inside of the said cylinder part.

  According to the invention which concerns on Claim 4, when a taper surface is formed in at least one of a 2nd stopper part and a convex part, a light guide can be further more easily inserted into the inside of a cylinder part.

  According to the fifth aspect of the present invention, since the locking projection comes into contact with each of the pair of groove side surfaces of the locking groove in a state where the locking projection is inserted into the locking groove, The light guide can be reliably positioned on the cylindrical portion in the circumferential direction. Thereby, the incorrect assembly of this light guide with respect to this cylinder part can be prevented. Moreover, it can prevent suitably that this light guide rotates in the circumferential direction of a cylinder part in the state which mounted | wore the inside of the cylinder part with the light guide.

  According to the sixth aspect of the present invention, the pair of first stopper portions and the pair of second stopper portions are provided to face each other, so that the first stopper portion and the second stopper portion are provided one by one. Compared to the case where it is provided, the light guide can be positioned and held in the cylindrical portion with a good balance. In addition, since the pair of first stopper portions are opposed to each other, when the cylindrical portion (cover portion) is formed by injection molding, the core disposed inside the cylindrical portion is divided into an appropriate size. Thus, the core can be easily taken out from the inside of the cylindrical portion.

  According to the seventh aspect of the present invention, the pair of projecting portions presses one surface of the substrate so that the light emitting element is sandwiched therebetween, and the first engaging portion provided on each of the pair of projecting portions is used as a support member. Since the substrate is held by the cover portion by engaging with the provided second engaging portion, the distance between the light emitting element and the cylindrical portion can be kept constant.

  According to the eighth aspect of the present invention, since both the support member and the cover portion are made of a resin material, when the cover portion is fitted to the support member, it can be held flexibly and elastically.

1 is a perspective view of a light emitting device according to an embodiment of the present invention. It is a disassembled perspective view of the light-emitting device shown in FIG. It is a top view of the case which comprises the light-emitting device shown in FIG. It is the perspective view which looked at the cover part of the light-emitting device shown in FIG. 2 from the back side. It is a cross-sectional explanatory drawing for demonstrating the procedure which attaches a light guide to the inside of the cylinder part which comprises the said cover part. It is sectional drawing in alignment with the VI-VI line of FIG. 1 in the state before mounting | wearing with the said cover part. It is sectional drawing along the VII-VII line of FIG. 1 in the state after mounting | wearing with the said cover part. It is sectional drawing along the VIII-VIII line of FIG. It is a partial cross section top view which shows the state which has arrange | positioned the light-emitting device shown in FIG. 1 in the vehicle body panel. It is a disassembled perspective view of the light-emitting device provided with the cover part and light guide which concern on the modification of this invention. It is sectional drawing of the light-emitting device provided with the cover part and light guide which concern on the modification of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a light emitting device according to the present invention will be described in detail with reference to the accompanying drawings by way of preferred embodiments.

  A light-emitting device 10 according to the present embodiment is used for illumination in a vehicle interior. As shown in FIGS. 1 and 2, a light-emitting element 12 as a light source and the light-emitting element 12 are mounted and rectangular in a plan view. The substrate 14 formed on the substrate 14 and a surface of the substrate 14 on which the light emitting element 12 is mounted (hereinafter sometimes referred to as a mounting surface) 16 are attached and electrically connected to the light emitting element 12. An electronic component 18, a pair of connection terminals (terminals) 20 a and 20 b connected to the substrate 14, a case (support member) 22 in which the substrate 14 and the like are accommodated, and a cover portion 24 attached to the case 22. And a light guide 25 that guides the light emitted from the light emitting element 12.

  For example, an LED is used as the light emitting element 12, but an organic EL or the like can also be used. Known LEDs and organic EL can be used. The light emitting element 12 is unevenly distributed slightly on one end side from the longitudinal center of the substrate 14.

  The electronic component 18 is used for controlling supply of power to the light emitting element 12, and examples thereof include a resistor and a diode. The electronic component 18 is substantially centered in the short side direction of the substrate 14 and is unevenly distributed on the other end side slightly from the center in the longitudinal direction.

  A pair of through holes 26 a and 26 b are formed along the longitudinal direction of the substrate 14 closer to the other end side than the electronic component 18. One end portions of the connection terminals 20a and 20b are inserted into the through holes 26a and 26b, and the separation interval can be arbitrarily set. In this case, it is preferable that the connection terminals 20a and 20b are not in contact with each other in a state where the connection terminals 20a and 20b are inserted and fixed in the through holes 26a and 26b. Although not shown, a conductor is arranged in a planar shape, for example, a foil shape, on the back surface 28 of the substrate 14, and the light emitting element 12, the electronic component 18, and the connection terminals 20 a and 20 b are interposed via the conductor. Electrically connected. This is to obtain a heat dissipation effect.

  As can be understood from FIGS. 2 and 8, both end surfaces of the connection terminal 20a are formed flat. However, the shape of both ends of the connection terminal 20a is not particularly limited, and may be formed in a tapered shape, for example. In this case, one end of the connection terminal 20a can be easily inserted into the through hole 26a, and the other end of the connection terminal 20a can be easily attached to an external connector for power supply described later.

  The connection terminal 20a is formed of an elongated metal rod (metal plate) having a rectangular cross section, and is welded to the substrate 14 in a state of being inserted into the through hole 26a of the substrate 14 (see FIG. 8). It has an arcuate curved portion 32 that continues to the welded portion 30 and a lead portion 34 that continues to the curved portion 32 and extends toward the other end.

  A thickness T1 (see FIG. 8) of the connection terminal 20a is set to such a thickness that the bending portion 32 can be bent. As a result, the bending portion 32 can be bent to adjust the positional relationship between the welded portion 30 and the lead portion 34. Actually, the lead portion 34 is connected to an external connector for power supply (not shown), so that power can be supplied to the light emitting element 12 from the outside. Since the connection terminal 20b inserted into the through hole 26b has the same configuration as the connection terminal 20a, detailed description thereof is omitted.

  As shown in FIG. 3, the case 22 has a case body 36 that is wide and extends in one direction and accommodates the board 14, and a connector portion 38 that is narrow and connected to the case body 36. The case body 36 and the connector portion 38 are integrally formed of resin or the like.

  Referring to FIG. 6, the case body 36 includes a bottom portion 40 formed in a substantially rectangular shape in plan view, and a pair of first step portions 42 a and 42 b provided at both ends in the short direction of the bottom portion 40. A pair of second stepped portions 44a, 44b connected to each of the pair of first stepped portions 42a, 42b, a pair of side wall portions 46a, 46b connected to each of the pair of second stepped portions 44a, 44b, It has a wall portion 48 that stands on the bottom portion 40 and extends to the vicinity of the upper end portions of the side wall portions 46 a and 46 b, and a thick wall portion 50 that stands on the bottom portion 40 and faces the wall portion 48.

  The first step portions 42 a and 42 b extend along the side wall portions 46 a and 46 b, one end portion thereof is in contact with the wall portion 48, and the other end portion thereof is in contact with the wall portion 50. Each of the first step portions 42a and 42b includes first vertical surfaces 43a and 43b that are continuous with the inner surface 40a of the bottom portion 40 (a surface facing the substrate 14), and a first upper surface 45a that is continuous with each of the first vertical surfaces 43a and 43b. , 45b.

  The widths W1 of the first vertical surfaces 43a and 43b (the heights of the first step portions 42a and 42b) W1 are set to be approximately the same as the thickness T2 of the substrate 14. Accordingly, an appropriate gap S is formed between the substrate 14 and the bottom portion 40 in a state where the substrate 14 is placed on the first upper surfaces 45a and 45b. Thereby, since the heat generated from the light emitting element 12 and the electronic component 18 can be diffused into the gap S, the light emitting element 12 and the electronic component are compared with the case where the entire back surface 28 of the substrate 14 is brought into contact with the bottom portion 40. The temperature rise of 18 can be suppressed.

  The second step portions 44 a and 44 b extend along the side wall portions 46 a and 46 b, and one end portion thereof is in contact with the wall portion 48 and the other end portion thereof is in contact with the connector portion 38. Each of the second step portions 44a and 44b has second vertical surfaces 47a and 47b that are continuous with the first upper surfaces 45a and 45b, and second upper surfaces 49a and 49b that are continuous with the second vertical surfaces 47a and 47b, respectively.

  The width (the height of the second stepped portions 44a and 44b) W2 of the second vertical surfaces 47a and 47b is set to be larger than the thickness T2 of the substrate 14. Accordingly, the second upper surfaces 49a and 49b are positioned above the mounting surface 16 of the substrate 14 in a state where the substrate 14 is placed on the first upper surfaces 45a and 45b.

  The interval between the second vertical surfaces 47a and 47b is set to be substantially the same as the width of the substrate 14 in the short direction. Thereby, the movement of the board | substrate 14 in the transversal direction can be restrict | limited.

  As shown in FIG. 2, a plurality of (two in the figure) mounting holes (second engaging portions) 52a and 52b spaced apart from each other by a predetermined distance are formed in the side wall portion 46a. Second engagement portions) 52c and 52d are formed. The mounting holes 52a and 52b and the mounting holes 52c and 52d are opened in a square shape, and this configuration is configured by mounting claws (first engaging portions) 70a and 70b of the cover portion 24 described later and mounting claws (first engaging portions). ) Corresponds to the respective shapes of 70c and 70d.

  The mounting holes 52a and 52b and the mounting holes 52c and 52d are located slightly above the center of the side wall portions 46a and 46b. Accordingly, when the cover portion 24 is attached to the case 22, the attachment holes 52a and 52b and the attachment holes 52c and 52d are attached to the attachment claws as compared with the case where the attachment holes 52a and 52b are positioned below the center of the side wall portions 46a and 46b. Since the amount of elastic deformation of the side wall portions 46a and 46b pushed outward by the attaching claws 70c and 70d can be reduced, the cover portion 24 can be attached to the case 22 with a smaller force. it can.

  Further, the mounting holes 52a and 52b of the side wall portion 46a are spaced in the longitudinal direction of the case 22 from one end of the side wall portion 46a to the mounting hole 52a, the distance between the mounting hole 52a and the mounting hole 52b, and from the mounting hole 52b to the side wall. It arrange | positions so that the space | interval to the other end of the part 46a may become equal. The mounting hole 52c of the side wall 46b faces the mounting hole 52a, and the mounting hole 52d of the side wall 46b faces the mounting hole 52b. Thereby, compared with the case where the mounting holes 52a and 52b and the mounting holes 52c and 52d are located in the longitudinal direction of the case 22, the cover portion 24 can be held with a good balance.

  Fixing claws 54a that are positioned between the mounting holes 52a and 52b and the mounting holes 52c and 52d and engage with fixing parts 200a and 200b (described later) provided on the vehicle body panel P, on the outer surfaces of the side wall portions 46a and 46b. , 54b are formed (see FIG. 9). Each of the fixing claws 54a and 54b extends along the longitudinal direction of the case 22, is formed integrally with a base portion 55a and 55b configured in a substantially rectangular parallelepiped shape, and is inclined downward from the upper end portion toward the outside. Taper portions 57a and 57b.

  The heights of the wall 48 and the wall 50 are set such that the case 22 and the cover 24 are flush with each other when the cover 24 is attached to the case 22 (FIGS. 1 and FIG. 1). 8).

  The wall portion 50 is formed in a substantially T shape in a plan view and has a length that reaches the inside of the connector portion 38. A pair of arrangement grooves 56a and 56b extending along the longitudinal direction is formed in the approximate center of the upper surface of the wall 50 (see FIG. 3). The groove widths of the placement grooves 56a and 56b are set to be substantially the same as the widths of the lead portions 34 of the connection terminals 20a and 20b, respectively. The groove depths of the placement grooves 56a and 56b are the lead portions 34, respectively. The thickness is set to be substantially the same as the thickness T1 (see FIG. 8).

  As can be seen from FIG. 1, the connector portion 38 is formed in a rectangular tube shape, and the lead portions 34 of the respective connection terminals 20 a and 20 b are accommodated therein, and the connector portion 38 has An external connector for power supply (not shown) can be inserted into the cylindrical body. In the present embodiment, the thickness of the connector portion 38 in the vertical direction is larger than that of the case body 36. A rectangular cutout portion 58 is formed in the wall portion 53 constituting the connector portion 38, and the width of the cutout portion 58 corresponds to the width of a cover extension portion 64 described later (see FIG. 2).

  In the case 22 configured as described above, the space surrounded by the bottom portion 40, the first step portions 42a and 42b, the second step portions 44a and 44b, the side wall portions 46a and 46b, the wall portion 48, and the wall portion 50 and A space (chamber) 59 in which the cover portion 24 can be mounted is formed by the notch portion 58 of the connector portion 38.

  As shown in FIGS. 2 and 4, the cover portion 24 is integrally formed of resin or the like by, for example, injection molding, and the cover portion main body 60 having a substantially rectangular shape in plan view, and the cover portion main body 60. A cover extending portion 64 that extends narrowly from the other end portion, and a cylindrical portion 80 that is formed in the cover portion main body 60 and into which the light guide 25 can be mounted.

  The cover part main body 60 includes a base part 61 constituting its outer shape, a pair of projecting parts 62a and 62b projecting downward along the longitudinal direction from both lateral ends of the base part 61, and the pair of projecting parts. It has a pair of protrusion parts 68a and 68b formed in the parts 62a and 62b.

  The amount of protrusion of the protrusions 62a and 62b is defined corresponding to the height of the side walls 46a and 46b described above. The lengths of the protrusions 68a and 68b are set to be the same as the lengths of the protrusions 62a and 62b, and the protrusion amount is the difference between the width W2 of the second vertical surfaces 47a and 47b and the thickness T2 of the substrate 14 ( It is set to the same level as W2-T2) (see FIG. 6).

  Mounting claws 70a, 70b and mounting claws 70c, 70d that can be fitted into the mounting holes 52a, 52b and the mounting holes 52c, 52d described above are provided on the outer surfaces of the projecting portions 62a, 62b, respectively. The spacing interval is set to be the same as the spacing between the mounting holes 52a and 52b and the mounting holes 52c and 52d described above. The mounting claws 70a, 70b, 70c, and 70d have a substantially rectangular parallelepiped shape, but their lower end portions are formed in a tapered shape that gradually tapers downward.

  In this case, in the present embodiment, as shown in FIG. 6, the distance L1 from the lower end surfaces 69a, 69b of the projections 68a, 68b to the upper end surfaces of the mounting claws 70a, 70b and the mounting claws 70c, 70d is In a state where the substrate 14 is placed on the first upper surfaces 45a and 45b of 36, the distance L2 from the mounting surface 16 of the substrate 14 to the mounting holes 52a and 52b and the upper ends of the mounting holes 52c and 52d is set to be slightly larger. Yes. The reason will be described later.

  A terminal holding portion 72 protruding downward is formed at the boundary portion between the base portion 61 and the cover extending portion 64 (see FIG. 4). The lower end surface 73 of the terminal holding portion 72 and the lower end surfaces 69a and 69b of the protrusions 68a and 68b are integrally connected to form a flat surface.

  A pair of recesses 74a and 74b are formed on the lower end surface 73 of the terminal holding portion 72 so as to be spaced apart by a predetermined distance in the short direction of the cover body 60, and the spacing is provided on the wall portion 50 described above. This corresponds to the spacing between the grooves 56a and 56b.

  A groove 76 for holding the external connector for power supply is formed in a portion of the lower surface of the cover extending portion 64 adjacent to the terminal holding portion 72.

  The cylindrical portion 80 is substantially cylindrical and is located on one end side of the base portion 61, and the inside (inner hole) of the cylindrical portion 80 is open to the lower end surface of the base portion 61. Four thick portions 82a, 82b, 82c, and 82d are formed in the tubular portion 80 so as to be separated from each other along the circumferential direction thereof. Each thick portion 82a, 82b, 82c, 82d extends over the entire axial direction of the cylindrical portion 80, and the length along the circumferential direction of the cylindrical portion 80 is set to be substantially the same. Yes.

  The thick part 82 a and the thick part 82 c are arranged along the longitudinal direction of the base part 61, and the thick part 82 b and the thick part 82 d are arranged along the short direction of the base part 61.

  As shown in FIG. 6, a first stopper portion 86a is formed at the lower end portion of the inner peripheral surface of the thick portion 82b, and is opposed to the first stopper portion 86a at the lower end portion of the inner peripheral surface of the thick portion 82d. Thus, a first stopper portion 86b is formed. A locking groove 88 extending in the axial direction of the cylindrical portion 80 and opening at the upper end surface of the cylindrical portion 80 is formed on the upper end side of the inner peripheral surface of the thick portion 82b. Note that the locking groove 88 does not have to be opened in the upper end surface of the cylindrical portion 80. That is, the upper end portion of the locking groove 88 may be located slightly below the upper end surface of the cylindrical portion 80. Each 1st stopper part 86a, 86b is formed in a substantially rectangular parallelepiped shape, and the upper end surface is formed flat.

  As shown in FIG. 5, a groove portion 90 a extending along the axial direction of the cylindrical portion 80 is formed on the inner peripheral surface of the thick portion 82 a, and the groove portion 90 a is slightly below the upper end of the cylindrical portion 80. It extends from the position to its lower end. Thereby, the 2nd stopper part 92a in which the convex part 96a of the light guide 25 mentioned later can contact | abut (latching) is formed in the upper end part of the internal peripheral surface of the thick part 82a.

  A groove portion 90b having the same shape as the groove portion 90a is formed on the inner peripheral surface of the thick portion 82c so as to face the groove portion 90a. Thereby, the 2nd stopper part 92b which can contact | abut (lock) the convex part 96b of the light guide 25 mentioned later at the upper end part of the internal peripheral surface of the thick part 82c will be formed. Each of the second stopper portions 92a and 92b is formed in a tapered shape that tapers toward the upper end, and its lower end surface is formed flat.

  The light guide 25 is a transparent body and is integrally formed of a resin material. 2, 5, and 6, the light guide 25 is formed on the light guide body 94 formed in a columnar shape and the outer peripheral surface of the light guide body 94. A pair of convex portions 96a and 96b that can be inserted into the pair of grooves 90a and 90b, respectively, and a substantially rectangular parallelepiped shape formed on the outer peripheral surface of the light guide body 94 and extending in the axial direction of the light guide body 94. And a locking projection 98.

  The outer diameter of the light guide body 94 corresponds to the inner diameter of the cylindrical portion 80. Each of the convex portions 96a and 96b has a substantially rectangular parallelepiped shape, but its lower end portion is formed in a taper shape that gradually tapers downward, and its upper end surface is formed flat. Moreover, each convex part 96a, 96b is set to the magnitude | size which can be inserted in groove part 90a, 90b.

  The distance L3 from the lower end surface of the light guide body 94 to the upper end surfaces of the convex portions 96a and 96b is the distance L4 from the upper end surface of the first stopper portions 86a and 86b to the lower end surfaces of the second stopper portions 92a and 92b. Are set to approximately the same length. The reason for this will be described later.

  The width of the locking protrusion 98 (the length along the direction of the light guide body 94 in the direction orthogonal to the axial direction and the radial direction) is set to be approximately the same as the groove width of the locking groove 88 described above. Thereby, in a state where the locking protrusion 98 is inserted into the locking groove 88, the locking protrusion 98 comes into contact with each of the pair of groove side surfaces of the locking groove 88. The light guide 25 can be reliably positioned on the cylindrical portion 80. Therefore, misassembly of the light guide 25 with respect to the cylindrical portion 80 can be prevented. In addition, it is possible to suitably prevent the light guide 25 from rotating in the circumferential direction of the cylindrical portion 80 in a state where the light guide 25 is mounted inside the cylindrical portion 80.

  Next, a procedure for assembling the light emitting device 10 according to this embodiment will be described. First, the light emitting element 12 and the electronic component 18 are mounted on one surface (mounting surface 16) of the substrate 14, and the welding portions 30 of the connection terminals 20a and 20b are inserted into the through holes 26a and 26b of the substrate 14, respectively. The welded portion 30 is fixed to the substrate 14 by soldering.

  Thereafter, the substrate 14 on which the light emitting element 12 and the like are mounted is made to enter the case 22. At this time, as shown in FIG. 6, the back surface 28 of the substrate 14 contacts the first upper surfaces 45a and 45b, and the side surface of the substrate 14 contacts the second vertical surfaces 47a and 47b. 56b, the respective lead portions 34 of the connection terminals 20a and 20b are accommodated. As a result, the substrate 14 and the connection terminals 20a and 20b are positioned in the case 22.

  In addition, the light guide 25 is mounted inside the cylindrical portion 80. Specifically, as shown in FIG. 5, the light guide 25 is adjusted after the orientation of the light guide 25 with respect to the cover portion 24 is adjusted so that the locking protrusions 98 are inserted into the locking grooves 88. It enters into the inside of the cylinder part 80. If it does so, the taper surface of convex part 96a, 96b will come in contact with the taper surface of 2nd stopper part 92a, 92b in the state which the outer peripheral surface of the light guide main body 94 and the inner peripheral surface of the cylinder part 80 contacted.

  Subsequently, when the light guide body 25 is pressed to the side where the base portion 61 is located, the light guide body 25 is elastically deformed in a direction in which the thick portions 82a and 82c are separated from each other (outward in the radial direction of the tube portion 80). It further enters the inside of the cylindrical portion 80, and the lower end surface of the light guide body 94 comes into contact with the upper end surfaces of the first stopper portions 86a and 86b. At this time, the thick portions 82a and 82c that have been elastically deformed return to the original shape, the locking projection 98 is disposed in the locking groove 88, and the convex portions 96a and 96b are disposed in the groove portions 90a and 90b.

  As described above, the distance L3 from the lower end surface of the light guide body 94 to the upper end surfaces of the convex portions 96a and 96b is the upper end surface of the first stopper portions 86a and 86b and the lower end surfaces of the second stopper portions 92a and 92b. In this state, the upper end surface of the convex portion 96a abuts on the lower end surface of the second stopper portion 92a, and the upper end surface of the convex portion 96b is the second stopper portion 92b. Abuts the lower end surface. As a result, the light guide 25 is positioned and held inside the cylindrical portion 80 (see FIG. 6). At this time, a part of the light guide body 94 protrudes from the cylindrical portion 80.

  Subsequently, the cover portion 24 is attached to the case 22. Specifically, when the cover part 24 is brought close to the case 22, the protruding part 62a, the outer surface of the protruding parts 62a, 62b of the cover part 24 and the inner surface of the side wall parts 46a, 46b of the case body 36 are in contact with each other. The lower end of 62b enters the case body 36, so that the mounting claws 70a and 70b and the mounting claws 70c and 70d come into contact with the side wall portions 46a and 46b.

  When the cover portion 24 is pressed toward the bottom 40 side of the case body 36, the side wall portions 46a and 46b are elastically deformed in a direction away from each other, and the protrusions 62a and 62b are elastically deformed in a direction close to each other by the reaction force. However, the protrusions 62 a and 62 b further enter the case body 36.

  Thereafter, the lower end surfaces 69a and 69b of the protrusions 68a and 68b are in contact with the mounting surface 16 of the substrate 14, and the lower end surfaces of the protrusions 62a and 62b are in contact with the second upper surfaces 49a and 49b. As described above, the distance L1 from the lower end surfaces 69a and 69b to the upper end surfaces of the mounting claws 70a and 70b and the mounting claws 70c and 70d is the upper end of the mounting holes 52a and 52b and the mounting holes 52c and 52d. In this state, the mounting claws 70a, 70b, 70c, and 70d are not yet fitted in the mounting holes 52a, 52b, 52c, and 52d.

  Next, when the cover part 24 is further pushed into the bottom 40 side, the case main body 36 and the cover part 24 are slightly bent, so that the cover part 24 further enters the case main body 36, and the mounting claws 70a, 70b, 70c, 70d The fitting holes 52a, 52b, 52c, and 52d are fitted (see FIG. 6). At this time, the projecting portions 62a and 62b and the side wall portions 46a and 46b that have been elastically deformed return to the original shape. As a result, the cover portion 24 is mounted on the case 22 in a state where the mounting surface 16 of the substrate 14 is pressed (abutted against the mounting surface 16) by the lower end surfaces 69a and 69b of the protrusions 68a and 68b. At this time, the lower end surface 73 of the terminal holding portion 72 comes into contact with the respective lead portions 34 of the connection terminals 20a and 20b (see FIG. 8).

  As shown in FIG. 9, the light emitting device 10 assembled as described above is disposed at a predetermined position of a vehicle body panel P of a vehicle (not shown). Specifically, the opening on the side opposite to the side where the substrate 14 is located in the cylindrical portion 80 is directed vertically downward, and the window portion H formed in the vehicle body panel P and the light guide body 94 face each other. As described above, the light emitting device 10 is set on the back side of the vehicle body panel P (the position of the two-dot chain line in FIG. 9), and the light emitting device 10 is brought close to the vehicle body panel P. Thereby, first, the resin fixing portions 200a and 200b provided on the back surface side of the vehicle body panel P come into contact with the tapered portions 57a and 57b of the fixing claws 54a and 54b of the light emitting device 10.

  Next, when the light-emitting device 10 is further pressed toward the vehicle body panel P, the light-emitting device 10 advances toward the vehicle body panel P while the fixing portions 200a and 200b are elastically deformed in a direction away from each other, and the cylindrical portion 80 is moved toward the vehicle body panel P. A portion of the light guide body 94 is fitted into the window H and exposed to the vehicle compartment. At this time, the fixing portions 200a and 200b that have been elastically deformed return to the original shape. As a result, the light emitting device 10 is clamped by the vehicle body panel P and the fixing portions 200a and 200b, and is thus firmly fixed to the vehicle body panel P.

  According to the light emitting device 10 according to the present embodiment, the lower end surfaces 69a of the protrusions 68a and 68b of the cover portion 24 with the back surface 28 of the substrate 14 in contact with the first upper surfaces 45a and 45b of the case body 36, Since 69b is pressed (pressed) against the mounting surface 16 of the substrate 14, the substrate 14 can be securely held against the case 22. Thereby, the space | interval of the light emitting element 12 and the cylinder part 80 can be made constant.

  In addition, since the lower end surface of the light guide body 94 is in contact with the upper end surfaces of the first stopper portions 86a and 86b in a state where the light guide 25 is mounted inside the cylindrical portion 80, the substrate 14 of the light guide 25 is provided. The movement toward the side is blocked. Thereby, the light guide 25 is positioned inside the cylindrical portion 80.

  Furthermore, in this state, since the upper end surfaces of the convex portions 96a and 96b are in contact with the lower end surfaces of the second stopper portions 92a and 92b, the light guide 25 moves on the side opposite to the side where the substrate 14 is located. Be blocked. Thereby, for example, even when the direction of the light emitting device 10 is set so that the opening on the side opposite to the side on which the substrate 14 is located in the cylindrical portion 80 is directed vertically downward, the light guide to the cylindrical portion 80 is performed. The position of the body 25 does not shift. Thereby, the distance between the light emitting element 12 and the light guide 25 can be kept constant regardless of the direction of the light emitting device 10.

  In the present embodiment, the light guide 25 is positioned and held inside the cylindrical portion 80 using the first stopper portions 86a and 86b and the second stopper portions 92a and 92b. There is no need to form a hole for holding the light guide 25. Therefore, there is no problem that light emitted from the light emitting element 12 leaks to the outside through the hole. Therefore, the quality of the light emitting device 10 can be improved without increasing the number of parts.

  In the present embodiment, since the convex portions 96a and 96b that can come into contact with the second stopper portions 92a and 92b are integrally formed on the outer surface of the light guide body 94, the light guide 25 is attached to the cylindrical portion 80. When inserting into the inside, the convex portions 96 a and 96 b can be pressed against the second stopper portions 92 a and 92 b to bend the thick portions 82 a and 82 c outward in the radial direction of the cylindrical portion 80. Thereby, the light guide 25 can be more easily inserted into the cylindrical portion 80.

  Further, the light guide 25 is pressed toward the base portion 61 in a state where the tapered surfaces of the convex portions 96a and 96b of the light guide 25 are in contact with the tapered surfaces of the second stopper portions 92a and 92b. The portions 82 a and 82 c can be easily bent outward in the radial direction of the cylindrical portion 80. Therefore, the light guide 25 can be inserted into the cylindrical portion 80 more easily.

  Further, the pair of first stopper portions 86 a and 86 b are disposed to face the short direction of the base portion 61, and the pair of second stopper portions 92 a and 92 b are disposed to face the longitudinal direction of the base portion 61. Therefore, for example, the light guide 25 is formed in a cylinder as compared with a case where the first stopper portion 86a and the second stopper portion 92a are provided one by one (when the first stopper portion 86b and the second stopper portion 92b are omitted). Positioning and holding can be performed on the portion 80 with good balance. Further, when the cover portion 24 is formed by injection molding, the core disposed inside the cylindrical portion 80 is divided into an appropriate size so that the core can be easily taken out from the inside of the cylindrical portion 80. be able to.

  According to the light emitting device 10 according to the present embodiment, the pair of projecting portions 62a and 62b of the cover portion 24 press the mounting surface 16 of the substrate 14 with the light emitting element 12 interposed therebetween, and each of the projecting portions 62a and 62b. Since the mounting claws 70a and 70b and the mounting claws 70c and 70d provided on the side fit into the mounting holes 52a and 52b and the mounting holes 52c and 52d formed in the side wall portions 46a and 46b, respectively. The interval between the parts 80 can be kept constant.

  In the present embodiment, the outer surfaces of the protrusions 68a and 68b of the cover part 24 are in contact with the second vertical surfaces 47a and 47b of the case body 36 with the cover part 24 attached to the case 22. The relative movement of the cover portion 24 and the substrate 14 in the short direction can be suitably suppressed. Thereby, the optical axis of the light emitting element 12 can be positioned on the axis of the cylindrical portion 80.

  Furthermore, in the present embodiment, since the lower end surface 73 of the terminal holding portion 72 is in contact with the respective lead portions 34 of the connection terminals 20a and 20b accommodated in the arrangement grooves 56a and 56b, the connection terminals 20a and 20b. Can be suitably held with respect to the case 22.

  Thereby, since it is not necessary to provide components for holding the connection terminals 20a and 20b, the entire light emitting device 10 can be effectively reduced in size and weight. Further, since each of the connection terminals 20a and 20b is fixed to the substrate 14 via the welded portion 30, the holding of the substrate 14 is further stabilized by holding the connection terminals 20a and 20b.

  By the way, the case 22 usually has a dimensional tolerance. Therefore, when the substrate 14 on which the light emitting element 12 and the connection terminals 20a and 20b are mounted is positioned in the case 22, for example, the lead portions 34 of the connection terminals 20a and 20b slightly protrude from the arrangement grooves 56a and 56b. There is.

  Even in such a case, according to the light emitting device 10 according to the present embodiment, the curved portion 32 is provided in each of the connection terminals 20a and 20b, so that when the cover portion 24 is attached to the case 22, By bending the bending portion 32, it is possible to hold the connection terminals 20a and 20b without applying excessive stress to the welded portion 30. Thereby, the connection failure of the welding part 30 can be suppressed suitably.

  Further, since the pair of recesses 74 a and 74 b are formed in the lower end surface 73 of the terminal holding portion 72, the curved portion 32 of the connection terminals 20 a and 20 b hits the cover portion 24, and it is difficult to attach the cover portion 24 to the case 22. Can be prevented. Further, a pair of recesses 74 a and 74 b are not formed on the lower end surface 73 of the terminal holding portion 72, and a space is provided between the curved portion 32 and the lower end surface 73 so that the curved portion 32 does not hit the lower end surface 73. Compared with the case where the light emitting device is provided, the entire light emitting device 10 can be made compact.

  Further, in the present embodiment, since the electronic component 18 is disposed on the mounting surface 16 of the substrate 14 on which the light emitting element 12 is mounted, compared with the case where the electronic component 18 is mounted on the back surface 28 of the substrate 14. The entire light emitting device 10 can be suitably reduced in size and weight.

  In the light emitting device 10 according to the present embodiment, instead of the cover 24 and the light guide 25, a cover 100 and a light guide 102 as shown in FIGS. 10 and 11 may be used. In this modification, the same components as those of the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 10 and 11, the cover 100 is different from the cylinder 80 described above in the configuration of the cylinder 104. Specifically, the above-described groove portion 90a of the thick portion 82a is omitted, the second stopper portion 106a is projected from the upper end of the inner peripheral surface of the thick portion 82a, and the groove portion 90b of the thick portion 82c is omitted. The second stopper portion 106b is projected from the upper end of the inner peripheral surface of the thick portion 82c. Each of the second stopper portions 106a and 106b is formed in a tapered shape that gradually tapers toward the upper end.

  In the cylindrical portion 104, as in the above-described embodiment, the first stopper portion 86a is formed at the lower end portion of the inner peripheral surface of the thick portion 82b, and the first stopper is formed at the lower end portion of the inner peripheral surface of the thick portion 82d. A portion 86b is formed. Further, in the light guide 102, the above-described convex portions 96a and 96b of the light guide 25 are omitted.

  In this case, the lower end surface of the light guide body 94 abuts on the upper end surfaces of the first stopper portions 86a and 86b and the upper end surface of the light guide body main body 94 with the light guide body 102 mounted in the cylindrical portion 104. Is in contact with the lower end surfaces of the second stopper portions 106 a and 106 b, so that the light guide 102 can be positioned and held inside the cylindrical portion 104. Moreover, according to this modification, since it is not necessary to provide the above-mentioned convex part 96a, 96b in the outer peripheral surface of the light guide main body 94, the light guide 102 can be made a simple structure. As a result, the manufacturing cost of the light emitting device 10 can be reduced.

  The present embodiment is not limited to the configuration described above. For example, the light emitting device 10 may be configured by mounting a plurality of light emitting elements 12 on the substrate 14.

  In the light emitting device 10 according to the present embodiment, the distance L1 from the lower end surfaces 69a, 69b of the projections 68a, 68b to the upper end surfaces of the mounting claws 70a, 70b, 70c, 70d is set to the mounting hole 16 from the mounting surface 16 of the substrate 14. You may set to the same distance L2 to the upper end part of 52a, 52b, 52c, 52d. In this case, the substrate 14 is hardly pressed by the projections 68a and 68b, but the substrate 14 is against the case body 36 by the contact resistance between the lower end surfaces 69a and 69b of the projections 68a and 68b and the mounting surface 16 of the substrate 14. Can be held.

  In the present embodiment, instead of the mounting claws 70a, 70b, 70c, 70d, mounting holes are formed in the protrusions 62a, 62b of the cover portion 24, and the mounting holes 52a, 52b, 52c, 52d are replaced with the mounting holes 52a, 52b, 52c, 52d. You may provide a mounting nail | claw in the side wall parts 46a and 46b. Also in this case, the cover part 24 can be easily attached to the case 22.

  The quantity, position, and shape of the mounting holes 52a to 52d, the mounting claws 70a to 70d, and the fixing claws 54a and 54b can be changed as appropriate. Moreover, the quantity, position, and shape of the first stopper portions 86a and 86b, the second stopper portions 92a, 92b, 106a, and 106b, and the convex portions 96a and 96b can be changed as appropriate.

  The cylinder portion 80 according to the present embodiment is not limited to an example made of a resin material, and may be made of any material. For example, the cylinder part 80 may be made of a metal material such as iron. In this case, for example, when the light guide 25 is inserted into the cylindrical portion 80 by adjusting the thickness of the cylindrical portion 80 (the cylindrical portion 80 is formed thin), the cylindrical portion 80 is moved radially outward. Can be suitably bent. Similarly, the cylindrical portion 104 may be made of any material.

  The present invention is not limited to the above-described embodiment, and it is naturally possible to adopt various configurations without departing from the gist of the present invention. The light emitting device according to the present invention is not limited to lighting in the vehicle compartment.

DESCRIPTION OF SYMBOLS 10 ... Light-emitting device 12 ... Light-emitting element 14 ... Board | substrate 16 ... Mounting surface 18 ... Electronic component 20a, 20b ... Connection terminal 22 ... Case (support member) 24, 100 ... Cover part 25, 102 ... Light guide 28 ... Back surface 30 ... Welded portion (fixed portion) 32 ... curved portion 34 ... lead portion 42a, 42b ... first stepped portion 44a, 44b ... second stepped portion 45a, 45b ... first upper surface 46a, 46b ... sidewall portion 47a, 47b ... second vertical Surfaces 52a, 52b, 52c, 52d... Mounting hole (second engaging portion)
54a, 54b ... fixed claw 60 ... cover body 61 ... base portion 62a, 62b ... projections 68a, 68b ... projections 70a, 70b, 70c, 70d ... mounting claws (first engaging portion)
72 ... Terminal holding part 74a, 74b ... Recess 80, 104 ... Tube part 86a, 86b ... First stopper part 88 ... Locking groove 92a, 92b, 106a, 106b ... Second stopper part 94 ... Light guide body 96a, 96b ... Projection 98 ... Protrusion for locking

The light emitting device according to the present invention has the following features.

1st characteristic: It is a light-emitting device provided with a board | substrate, the light emitting element mounted in one surface of the said board | substrate, and the support member in which the said board | substrate is mounted , Comprising: The cover part main body which covers the said light emitting element, , provided on the cover body, a cover portion and a said light guide for guiding the light emitted from the light emitting element instrumentation wearing capable cylindrical portion, the cylindrical portion of the cover body is provided a surface On the opposite surface, a convex portion protruding toward the support member is formed.

Second feature: The cover body is formed with a through hole communicating with the inner hole of the cylindrical portion, and the convex portion does not overlap the through hole in a plan view from the axial direction of the cylindrical portion. In the position.

Third feature: The convex portion extends longer than the diameter of the through hole, and one end portion of the convex portion is located on one side in the extending direction of the convex portion from the through hole, The other end portion of the convex portion is located on the other side in the extending direction of the convex portion with respect to the through hole.

4th characteristic: Two said convex parts are provided so that the said through-hole may be pinched | interposed.

5th characteristic: The said cover part has a connection part which connects the one end part of each said convex part mutually.

6th characteristic: The said cover part has a cover extension part extended narrowly from the said cover part main body along a longitudinal direction, and hold | maintaining an external connector.

7th characteristic: The nail | claw part for latching the said cover part to the said supporting member is provided in the outer surface of the said convex part.

Claims (8)

A substrate that holds one end of the connection terminal and on which an electronic component is mounted;
A light emitting device mounted on one surface of the substrate;
A support member on which the substrate is placed;
A cover part that positions and holds the substrate by being attached to the support member in a state of being in contact with one surface of the substrate,
The cover part includes a cover part main body that covers the light emitting element, and a cylindrical part that is provided in the cover part main body and that can be mounted with a light guide that guides light emitted from the light emitting element.
On the inner surface of the cylindrical portion, a first stopper portion that contacts the light guide and prevents the light guide from moving in the direction toward the substrate;
In a state in which the light guide is in contact with the first stopper portion, the light guide is in contact with the light guide to prevent movement in the direction opposite to the side where the substrate is located. 2. A light emitting device comprising a stopper portion. The light-emitting device according to claim 1.
The light emitting device is characterized in that the cylindrical portion is integrally formed of a resin material. The light emitting device according to claim 1 or 2,
The light guide includes a light guide body,
A convex portion integrally formed on the outer surface of the light guide body and capable of contacting the second stopper portion, and the light guide by bringing the convex portion into contact with the second stopper portion. A light-emitting device that prevents movement in a direction toward a side opposite to a side on which the substrate is located. The light-emitting device according to claim 3.
A light-emitting device, wherein a taper surface is formed on at least one of the second stopper portion and the convex portion. The light-emitting device according to claim 4.
A locking groove extending in the axial direction of the cylindrical portion is formed on the inner surface of the cylindrical portion,
A light-emitting device characterized in that a locking projection is formed on the outer surface of the light guide body so as to be inserted into the locking groove in contact with each of the pair of groove side surfaces of the locking groove. . In the light-emitting device of any one of Claims 1-5,
Two first stopper portions are provided to face each other,
Two said 2nd stopper parts are provided so that it may mutually oppose, The light-emitting device characterized by the above-mentioned. In the light-emitting device of any one of Claims 1-6,
The cover body has a base that covers one surface of the substrate;
A pair of protrusions positioned so as to sandwich the light emitting element and formed integrally with the base part,
Each of the pair of protrusions includes a protrusion that abuts against one surface of the substrate and a first engagement portion.
The support member is provided with a chamber in which the substrate and the cover portion can be disposed, and a second engagement portion that engages with the first engagement portion. The light emitting device is characterized in that the substrate is positioned and held by the cover portion by engaging with the second engaging portion. The light-emitting device according to claim 7.
The support member is integrally formed of a resin material,
The light emitting device, wherein the cover part is integrally formed of a resin material.

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