JP2019106299A - Light source unit - Google Patents

Abstract

To provide a small-sized light source unit which mounts a card type light source correctly in a lamp and which prevents a half-fitted state between the card type light source and a power supply connector.SOLUTION: A light source unit 1 includes: a card type light source 6 in which a light source 62 is mounted on a card substrate 60, and in which a card edge connector is formed on the card substrate 6; and a power supply connector 7 which is fitted in the card type light source 6 by the card edge connector 64 and performs power supply. The card type light source 6 is mounted on a base part 51 of a lamp. At the base part 51, a step part 56 is formed in a region corresponding to the power supply connector 7. A connector body 70 of the power supply connector 7 is stored in the step part 56 and does not protrude to the outside of the base part 51, so that the light source unit 1 can be miniaturized.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a light source unit provided in a vehicle lamp, and more particularly to a light source unit provided with a card type light source in which a light emitting element is mounted on a card type substrate.

  Recently, as a lamp for vehicles such as a car, a light source device, i.e., a light source unit, is proposed in which light emitting elements such as LEDs (light emitting diodes) and LDs (laser diodes) are unitized as light sources. In such a light source unit, one or more light emitting elements are mounted on a card type circuit board (hereinafter referred to as a card board) to constitute a card type light source, and this card type light source is incorporated in a lamp The card-type light source is electrically connected to a vehicle-mounted power source, and power is supplied to the light emitting element.

  Conventionally, in a light source unit using such a card type light source, a separate power receiving connector is mounted on a part of a card substrate having a required shape, and a power feeding connector connected to an on-vehicle power supply is fitted to this power receiving connector. It is configured to feed power by doing this. However, in this configuration, the number of steps for mounting the power receiving connector on the card substrate is increased, and the size of the card type light source is impaired by the power receiving connector. Therefore, for example, as in Patent Document 1, an electrode pad is formed on one side of a card substrate as a power reception connector to form a card edge connector, thereby eliminating the need for mounting a separate connector, reducing the number of man-hours and A card-type light source that has been made possible to be miniaturized has been proposed.

JP, 2017-152371, A

  Although the specific structure for supplying electric power with respect to the card edge connector formed in the card-type light source is not described in patent document 1, it usually fits in a card edge connector and performs an electrical connection. Power supply connectors are provided. In this feed connector, an electrode terminal is disposed in a recessed groove provided in the connector body, and when the card edge connector is inserted in the recessed groove, the electrode terminal contacts the electrode pad of the card edge connector. Electrically connected.

  Thus, when the card edge light source is provided on the card type light source and this card edge connector is inserted into the concave groove of the power supply connector, the connector main body of the power supply connector protrudes to both the front and back of the card type light source. It becomes. Therefore, when the light source unit is attached to the lamp unit, for example, when the card type light source is attached to the main surface of the base portion of the heat sink, the feed connector interferes with the main surface of the base portion to make the card type light source It becomes impossible to attach it in the state where it was stuck. Therefore, when the optical axis position of the light emitting element is positioned with reference to the main surface of the base portion, the positioning accuracy may be lowered, which may adversely affect the light distribution characteristic of the lamp.

  In order to avoid this, the card edge connector is disposed so as to extend outside the main surface of the base portion, and then the power feeding connector is fitted to prevent interference between the power feeding connector and the base portion. In this case, the power supply connector is disposed in a state where the power supply connector protrudes outside the base portion, which makes it difficult to miniaturize the light source unit.

  In addition, when the card type light source is attached to the base portion in a state where the card type light source and the power feeding connector are fitted, when both are not sufficiently fitted to a predetermined state (hereinafter referred to as a semi-fitted state) In some cases, it may be difficult or impossible to attach the card-type light source to a predetermined position on the main surface of the base. In such a case, it is necessary to correct the fitting state of the two, which causes the assembly process of the lamp unit to be complicated and delayed. In addition, when attached in a semi-fitted state, the electrical contact between the two becomes insufficient, the electrical resistance increases, the heat generation at the time of lighting becomes significant, and the reliability of the light source device or the lamp unit decreases. Become a factor to

  An object of the present invention is to provide a compact light source unit capable of correctly mounting a card type light source in a lamp and eliminating a semi-fitted state of the card type light source and the feed connector.

  The light source unit according to the present invention includes a card type light source in which a light source is mounted on a card substrate and a card edge connector is formed on a part of the card substrate, and the card type light source is engaged with the card type light source to supply power. A card type light source is attached to a base portion of the lamp, and a step portion is formed in the base portion in a region corresponding to the power supply connector.

  In the light source unit according to the present invention, preferably, the card type light source is provided with alignment means for checking the alignment state with the feed connector at a portion constituting the card edge connector.

  According to the present invention, even in the state where the feeding connector is fitted to the card type light source, it is possible to obtain the light source unit in which the card type light source is suitably mounted in the lamp and the outside diameter size is reduced. Further, according to the present invention, it is possible to configure a light source unit in which the reliability is enhanced by preventing the half fitting state of the card type light source and the power feeding connector.

The front view which represented the light source unit transparently of the headlamp provided with the light source unit of this invention. The schematic longitudinal cross-sectional view which follows the II-II line of FIG. The schematic perspective view of a card type light source and a feed connector. Front view of a card type light source and a feed connector. FIG. 3 is a partial exploded perspective view of a light source unit. Sectional drawing when the card edge connector of a card type light source and the electric power feeding connector are fitted. FIG. 10 is a schematic front view illustrating a method of confirming the fitting state of the card edge connector and the power feeding connector by the alignment groove. The front view explaining the method to confirm the fitting state of a card edge connector and an electric power feeding connector by an alignment hole. The conceptual block diagram of the confirmation means which confirms a fitting state. Sectional drawing of the attachment state of a card type light source. The perspective view of the modification of a base part. The perspective view of the modification of a feed connector.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an automotive headlamp HL provided with a light source unit according to the present invention, and a portion of it is shown in a transparent manner. FIG. 2 is a schematic cross-sectional view along the line II-II. A lamp unit 2 for performing light illumination with a required light distribution in a lamp housing 3 configured of a lamp body 31 and a light transmitting cover 32 attached to the front opening of the lamp body 31, here a high beam light distribution A lamp unit is equipped.

  The lamp unit 2 includes a light source unit 1 and a projection lens 4 for projecting the light emitted from the light source unit 1 onto the front area of the vehicle.

  The light source unit 1 includes a heat sink 5 having a substantially flat base portion 51. The heat sink 5 is attached to the lamp body 31 at three peripheral portions of the base portion 51 by a known aiming mechanism 52, for example, an aiming screw. Although the details of the aiming mechanism 52 are omitted, the base portion 51 of the heat sink 5 can be tilted in the vertical direction and the lateral direction by performing the aiming adjustment. The main surface of the base portion 51 is directed to the front of the lamp unit, and the card type light source 6 is attached to the main surface. A heat dissipating fan 53 is attached to the rear surface of the heat sink 5 to enhance the heat dissipating effect of the heat generated by the card type light source 6.

  A reflector 8 is attached to the main surface of the base portion 51 together with the card-type light source 6 to reflect light emitted from the card-type light source 6 in a desired direction. At this time, part of the light is blocked. The projection lens 4 is attached to the base 51 by a lens holder 41. The projection lens 4 projects the light emitted from the card type light source 6 and reflected by the reflector 8 toward the front of the lamp unit 2 and illuminates the front area of the car with a required light distribution.

  Further, the light source unit 1 includes a feeding connector 7 electrically connected to the card type light source 6. The power supply connector 7 is connected by an electric cord 71 to an on-vehicle power supply of a car not shown in the figure, and electrically connected to a card type light source 1 fitted via a card edge connector 64 described later. Electric power is supplied to the card type light source 6 to emit light.

  FIG. 3 is an external perspective view of the card type light source 6 and the feeding connector 7, and FIG. 4 is a front view in which a part of them is broken. The card-type light source 6 mainly includes a card substrate 60 having a required shape. The card substrate 60 has a conductive pattern 61 in which a conductive film is formed in a required pattern on one surface of an insulating substrate, and a plurality of LEDs 62 as light emitting elements are mounted by surface mounting on this one surface. . Here, in the card substrate 60, the surface on which the LEDs 62 are mounted is referred to as a front surface, and the opposite surface is referred to as a back surface.

  The card substrate 60 has an element mounting portion 60A whose dimension in the width direction (left and right direction in FIG. 4) is formed to a required width dimension, and a connector portion 60B whose both sides are receded from this and the width dimension is shortened. It consists of The plurality of conductive patterns 61 are formed from both the element mounting portion 60A to the connector portion 60B, and in the element mounting portion 60A, a portion of the conductive pattern 61 is a mounting land of the plurality of LEDs 62 (see FIG. In the connector portion 60B, another part of the conductive pattern 61 is configured as a connector electrode pad 61P described later.

  In the element mounting portion 60A, a plurality of mounting lands are arranged substantially in a line in the width direction, and the LEDs 62 are surface-mounted on the respective mounting lands by solder or the like. As shown in the enlarged view of FIG. 2, the light emitting surface 62a of each LED 62 is directed to the front of the lamp, and a light reflecting portion 62b is provided so as to surround the light emitting surface 62a. The light reflecting portion 62b reflects light emitted from the light emitting surface portion 62a toward the lamp side toward the front of the lamp. Each LED 62 is electrically connected to one end of each conductive pattern 61 by a bonding wire 62c. The bonding wire 62 c is sealed by a resin 63.

  Further, in the plurality of LEDs 62, the LEDs 62H on the right side of FIG. 4 are arranged with a small array pitch size and high density, and the LEDs 62L on the left side are arranged with a large array pitch size and low density. Here, the right side LED 62H is referred to as a high density LED, and the left side LED 62L is referred to as a low density LED.

  On the other hand, the other end of the conductive pattern 61 electrically connected to the LED 62 is extended to the edge of the connector portion 60B, and is arranged in the width direction along the edge to constitute the connector electrode pad 61P. . The edge portion of the connector portion 60B is configured as a card edge connector 64 by these connector electrode pads 61P.

  In the element mounting portion 60A, a pair of circular holes 65 and 66 are respectively penetrated in the thickness direction at both end portions in the width direction. Of the pair of holes, the lower hole 65 in FIG. 4 has a diameter slightly larger than that of the other hole 66, and the large diameter hole 65 attaches the card type light source 6 to the base portion 51. The small diameter hole 66 is configured as a positioning hole for positioning the card type light source 6 with respect to the base portion 51.

  In the connector portion 60B, notches 67 are formed at both ends in the width direction toward the inner width direction, and are configured as hooking grooves. Further, circular holes 68 of small diameter are respectively penetrated in the thickness direction in proximity to the retaining grooves 67, and are configured as alignment holes for checking the fitting state with the power supply connector 7. This alignment hole 68 is one form of the alignment means in the present invention.

  Further, the connector portion 60B is formed with a straight linear narrow notch groove 69 extending from the edge constituting the card edge connector 64 toward the element mounting portion 60A. The notch groove 69 is penetrated in the thickness direction of the card substrate 60, and is formed between predetermined connector electrode pads 61P among the plurality of connector electrode pads 61P arranged in parallel. Further, the length L of the notch groove 69 is accurately determined such that the tip end thereof is at a specific position on the surface of the card substrate 60. This notch groove 69 is configured as an alignment groove for confirming a fitting state with the power supply connector 7, and is another form of the alignment means in the present invention.

  The alignment groove 69 is extended along the boundary between the area AH of the conductive pattern 61 (61H) connected to the high density LED 62H and the area AL of the conductive pattern 61 (61L) connected to the low density LED 62L. . Accordingly, the connector portion 60B is separated into the conductive pattern area AH of the high density LED 62H and the conductive pattern area AL of the low density LED 62L by the alignment groove 69. Further, in this embodiment, since the number of high density LEDs 62H is larger than the number of low density LEDs 62L, the alignment groove 69 is deviated toward the low density LEDs 62L than the central position in the width direction of the connector portion 60B. It is formed.

  By separating the connector portion 60B in the width direction by the alignment groove 69 in this manner, the heat generated on the high density LED 62H side where the calorific value per unit area increases is moved toward the region of the low density LED 62L. Can be suppressed, and the temperature rise on the low density degree LED 62L side can be suppressed. Further, since the area of the area of the high density LED 62H is larger than that of the low density LED, the heat generated by the high density LED 62H can be effectively dissipated from the surface or the back of the area.

  Further, the alignment groove 69 may be provided in a part of the area AL. For example, as shown by a phantom line (two-dot chain line) in FIG. 4, an alignment groove 69A may be formed between the conductive patterns 61L connected to the low density LEDs 62L. As described above, if the alignment groove 69A is formed in the area AL on the low density side, the area of the area AH on the high density side is not reduced, and the heat capacity of the card substrate 60 in the area AH is increased. Is enhanced.

  On the other hand, the feed connector 7 as one of the components of the light source unit 1 has a flat rectangular cylindrical resin body 70 as shown in FIGS. 3 and 4. The card edge connector 64 of the card type light source 6 is inserted into a cylindrical groove 72 opened in one end face 70a (hereinafter referred to as the front surface). In the cylindrical groove 72 of the connector main body 70, connector electrode terminals 73 made of a conductive member such as metal are arranged at positions corresponding to the plurality of connector electrode pads 61P constituting the card edge connector 64, respectively. There is. The connector electrode terminals 73 are electrically connected to the corresponding connector electrode pads 61P when the card edge connector 64 is inserted. The electrical cord 71 is connected to each connector electrode terminal 73.

  In the cylindrical groove 72 of the connector main body 70, a rib 74 for enhancing the strength of the connector main body 70 is formed at a part in the middle in the arrangement direction of the connector electrode terminals 73. The rib 74 is a position corresponding to the alignment groove 69 provided in the card type light source 6. That is, when the card edge connector 64 is inserted into the cylindrical groove 72, the rib 74 enters into the alignment groove 69 to enable the insertion. As described above, the alignment groove 69 is offset from the center in the width direction, and the rib 74 is correspondingly offset in the width direction. The mold light source 6 is prevented from being fitted in the opposite direction.

  In addition, hooking pieces 75 are provided on both sides in the width direction at which the connector electrode terminals 73 are arranged in the cylindrical groove 72 of the connector main body 70, respectively. The hooking pieces 75 are configured as cantilevered pieces integrally formed with the connector main body 70. When the card edge connector 64 is inserted into the cylindrical groove 72, the hooking piece 75 is hooked on the hooking groove 67 of the connector portion 60B, and the card type light source 6 is easily detached by the hooking force. Not to be

  Here, the dimension of the connector main body 70 in the cylinder axial direction, that is, the dimension in the direction in which the card type light source 6 is fitted, is inserted when the card edge connector 64 is inserted into the power feeding connector 7 to a predetermined correct position. The front surface 70 a of the connector main body 70 is formed to have a size that matches the tip of the alignment groove 69.

  Further, in the connector main body 70, circular small diameter holes 76 are opened at both side positions near the front surface 70a in a state of penetrating in the thickness direction of the connector main body 70. These holes 76 are opened at positions where the cylindrical groove 72 exists, and are configured as position reference holes. The position reference hole 76 is formed to have substantially the same diameter as the alignment hole 68 provided in the card type light source 6, and the card edge connector 64 and the power supply connector 7 are fitted in a predetermined state. At this time, the centers of the alignment holes 68 are formed at positions that coincide with each other.

  The card type light source 6 and the feeding connector 7 having the above configuration are fitted to each other and then attached to the base portion 51 of the heat sink 5 to constitute the light source unit 1. FIG. 5 is an exploded perspective view of the light source unit 1. Mounting screw holes 54 are opened in the main surface of the base portion 51 of the heat sink 5 at positions corresponding to the mounting holes 65 of the card type light source 6. Further, a cylindrical positioning boss 55 is provided upright at a position corresponding to the positioning hole 66. Furthermore, a shallow step 56 is formed in a region from one edge of the base 51 to the positioning boss 55. The stepped portion 56 is constituted by a concave portion in which a part of the main surface of the base portion 51 is recessed, and the width dimension thereof is substantially equal to the width dimension of the connector main body 70 of the feeding connector 7 and the depth thereof Is a dimension substantially equal to the thickness dimension of the connector main body 70 projecting on the back surface side of the card substrate 60 of the card type light source 6 when the power feeding connector 7 and the power receiving connector 64 are fitted.

  In order to assemble this light source unit 1, first, the card type light source 6 is fitted to the feeding connector 7 and the both are integrated. Specifically, the card edge connector 64 of the card type light source 6 is inserted into the tubular groove 72 from the front surface 70 a side of the connector main body 70 of the power supply connector 7. FIG. 6 is a cross-sectional view when interpolated, and as shown in FIG. 6A, a plurality of connector electrode pads 61P on the surface of the card substrate 60 constituting the inserted card edge connector 64 are respectively provided. The connector electrode terminals 73 of the feed connector 7 are in contact with each other and are electrically connected to each other.

  Further, when the card edge connector 64 is inserted, as shown in FIG. 6B, the hook shaped end of the hooking piece 75 located on both sides of the connector main body 70 is hooked in the hooking groove 67 of the card type light source 6 Be done. At this time, it is possible to confirm the fitting state of the card type light source 6 and the power feeding connector 7 by touch feeling by the click feeling generated between the hooking piece 75 and the hooking groove 67. In addition, the card-type light source 6 can be prevented from easily falling off due to the holding force.

  Then, as shown in FIG. 5, the card-type light source 6 fitted with the power supply connector 7 is attached to the base 51. In this mounting, positioning of the card-type light source 6 is performed by inserting the positioning bosses 55 of the base portion 51 into the positioning holes 66 of the card-type light source 6. Next, the mounting screw 57 is inserted through the mounting hole 65 of the card-type light source 6 and then screwed into the mounting screw hole 54 of the base 51 to fixedly attach the card-type light source 6 to the base 51.

  In this embodiment, at the same time as the card-type light source 6 is attached, the reflector 8 is integrally attached to the base 51 by the attachment screw 57 in a state of being superimposed on the card-type light source 6. As shown in the enlarged cross section of FIG. 2, the reflector 8 has an opening 81 having a tapered light reflecting surface 82 in a part, and the opening 81 is positioned opposite to the light emitting surface 62 a of the LED 62. Ru. Thereby, the assembly of the light source unit 1 is completed. Thereafter, although the detailed description is omitted, as shown in FIG. 2, the lamp unit 2 is configured by attaching the projection lens 4 to the base portion 51 by the lens holder 41.

  In the lamp unit 2 assembled in this manner, when the card type light source 6 and the feeding connector 7 are fitted, the electric power of the on-vehicle power source is supplied to the card type light source 6, and the LED 62 emits light. The light emitted from the light emitting surface 62 a of each of the LEDs 62 that has emitted light is reflected by the light reflecting surface 82 when passing through the opening 81 of the reflector 8, and is then projected forward by the projection lens 4. As a result, the lamp unit 2 or the headlamp HL is turned on to illuminate the front area of the car.

  When assembling the light source unit 1, the feeding connector 7 is fitted to the card-type light source 6, but if the fitting is a half fitting which is insufficient at this time, the lamp unit 2 is assembled as described above. During the process, the fitting of the card type light source 6 and the feed connector 7 may be disengaged, which causes a defect in the assembly process of the lamp unit 2. In addition, if the lamp unit 2 is assembled to the headlamp HL as it is, an increase in electrical resistance in the electrical connection between the two and heat generation at the time of lighting become remarkable, and the lamp unit 2 to the headlamp HL There is a risk that the reliability may decline.

  In order to prevent the half fitting in such an assembly, it is possible to confirm the fitting by using the click feeling when the hooking piece 75 and the hooking groove 67 shown in FIG. 6B are hooked. Although it is possible, since this click feeling is due to the feel of the assembling worker, it is difficult to prevent the half fitting reliably by the individual difference of the sense.

  In order to reliably prevent this half fitting, in the light source unit 1 of the embodiment, the alignment groove 69 as the alignment means provided in the card type light source 6 functions effectively. FIG. 7 is a front view for explaining this alignment, and when the card edge connector 64 of the card type light source 6 is fitted to the feed connector 7 while inserting the card edge connector 64, as shown in FIG. The front surface 70 a of the connector body 70 is moved along the alignment groove 69, and the connector body 70 is gradually moved to cover the alignment groove 69.

  As described above, since the dimension in the fitting direction of the connector body 70 is formed to a predetermined dimension corresponding to the length L of the alignment groove 69, as shown in FIG. When the front surface 70a is aligned with the end of the alignment groove 69 and the connector body 70 is moved to the position where the alignment groove 69 is completely covered, the power supply connector 7 is properly fitted to the card type light source 6 It is confirmed that it was done. That is, by observing the transmission of light in the alignment groove 69, the fitted state can be confirmed.

  Further, according to the alignment hole 68 as the alignment means, as shown in FIG. 8, when the card edge connector 64 of the card type light source 6 is fitted into the feed connector 7 while inserting the both, the connector The position reference hole 76 of the main body 70 and the alignment hole 68 of the card-type light source 6 are in a state of overlapping each other. That is, when looking at the inside of the position reference hole 76 from the outside of the connector body 70, the alignment hole 68 is observed in the inside. At this time, as shown in FIG. 8A, when both connectors are in a semi-fitted state, the central positions of both holes 68 and 76 do not match and are observed as non-circular holes. As shown in FIG. 8 (b), when the two are properly fitted, the center positions of both the holes 68 and 76 coincide with each other, and are observed as true circular holes. Therefore, the fitted state can be confirmed by confirming the shape of the observed hole.

  When using the alignment groove 69 or the alignment hole 68 to confirm the fit of both connectors, it is preferable to use, for example, the confirmation means shown in FIG. FIG. 9A shows the case of visual confirmation by the operator, in which the light diffusion plate 102 is disposed below the work bench where the card type light source 6 and the feed connector 7 are fitted, and the illumination light source 101 is provided below it. Place.

  In this confirmation means, the illumination light source 101 is turned on, and the light diffusion plate 102 illuminated thereby becomes a uniform surface light source. Therefore, when the alignment groove 69 and the alignment hole 68 are visually observed as described above while fitting the both on the light diffusion plate 102, the alignment groove 69 is completely covered and concealed by the power supply connector 7. Alternatively, it becomes easy to confirm the shape of the bright hole observed inside the position reference hole 76, and a positive fit between both can be confirmed.

  FIG. 9B is a case where the confirmation is performed photoelectrically, and a light source unit 201 for emitting parallel light of a required luminous flux diameter is disposed vertically downward on the lower side of the work table to be fitted. Such a light source unit 201 can be realized by, for example, a light source 202 such as an LED and a collimator lens 203. Further, a light receiving unit 204 such as a light receiving element is disposed at a position immediately above the light source unit 201, and the light amount of the received light is detected by a light amount meter 205 or the like.

  In this confirmation means, the card type light source 6 and the feed connector 7 are fitted on the optical path of the light emitted from the light source unit 201. The light from the light source unit 201 is transmitted through the alignment groove 69 or the alignment hole 68 from the lower side to the upper side and then received by the light receiving unit 204. Therefore, in the case of the alignment groove 69, it can be confirmed that the fitting is correctly performed when the light receiving amount at the light receiving unit 204 becomes almost zero. In the case of the alignment hole 68, it can be confirmed that the light reception amount at the light receiving portion 204 is correctly fitted when the light receiving amount is the maximum peak.

  Here, the state when the card-type light source 6 is attached to the main surface of the base portion 51 is shown in the cross-sectional view of FIG. The card type light source 6 is mounted in a state in which the back surface is in close contact with the main surface of the base portion 51 with the front surface on which the LED 62 is mounted directed to the front of the lamp unit 2. A part of the power supply connector 7 fitted to the card type light source 6 by the card edge connector 64 is protruded in the thickness direction on the back side of the card type light source 6. Therefore, when the card type light source 6 is in close contact with the main surface of the base portion 51, the power supply connector 7 must be disposed at a lateral position away from the main surface. However, this makes it difficult to miniaturize the light source unit 1.

  In this embodiment, since the step portion 56 is provided in the base portion 51, the power supply connector 7 is accommodated in the step portion 56. Therefore, the back surface of the card type light source 6 can be correctly adhered to the main surface of the base 51, and the position of the light source, particularly the position of the LED 62 in the optical axis direction of the lamp unit 2 can be accurately set.

  At the same time, the height dimension including the card-type light source 6 and the feeding connector 7 on the main surface of the base portion 51 can be reduced by the depth dimension of the step portion 56, and the thinness of the light source unit 1 Can be In addition, the power supply connector 7 does not have to be disposed at a position protruding to the side of the base portion 51, and the light source unit 1 can be miniaturized.

  FIG. 11 is a view showing a modified example of the base portion 51 of the heat sink 5, and portions equivalent to the configuration shown in FIG. 5 are given the same reference numerals. In this modification, conical or cylindrical position fixing bosses 58 are provided upright at two positions of the step portion 56 provided on the base portion 51. The position fixing bosses 58 are provided at positions where the alignment holes 68 are located when the card type light source 6 to which the power supply connector 7 is properly fitted is attached to the base portion 51. The position fixing bosses 58 are formed to have substantially the same diameter as the corresponding alignment holes 68 and the position reference holes 76.

  By providing the position fixing bosses 58, as shown in the cross-sectional view of FIG. 10B, if the card type light source 6 and the feed connector 7 are properly fitted, the card type light source 6 is attached to the base portion 51. In this case, the position fixing boss 58 is smoothly inserted through the alignment hole 68 and the position reference hole 76, and the card type light source 6 is easily attached. When the fitting of the card type light source 6 and the feed connector 7 is close to a half fitting, the position fixing boss 58 is not inserted through the alignment hole 68 and the position reference hole 76, and the card type light source 6 is used as a base It becomes impossible to attach to the part 51. However, if forcedly inserted at this time, the card type light source 6 is forcibly moved relative to the feeding connector 7 by the contact between the peripheral surface of the position fixing boss 58 and the inner surfaces of the holes 68 and 76. It becomes possible to correct to the correct fitting state.

  Further, since the position fixing boss 58 is inserted through the position reference hole 68 and the alignment hole 76, when the card type light source 6 is attached to the base portion 51, position restriction of the feeding connector 7 with respect to the base portion 51 is required. become. Therefore, the power supply connector 7 can be prevented from coming off from the base portion 51 due to the fitting of the power supply connector 7 being removed. In place of the position fixing boss 58, the position reference hole 68 and the alignment hole 76 may be fixed to the base 51 by screws.

  As a modified example of the power supply connector 7, as shown in FIG. 12, a relief portion 77 may be provided in which both sides of the front surface 70a of the connector main body 70 are cut backward. The dimension in the thickness direction of the relief portion 77, that is, the dimension in the thickness direction of the connector body 70 along the vertical direction in the figure is at least larger than the thickness of the card substrate 60 of the card type light source 6. Further, the depth of the relief portion 77, that is, the dimension along the longitudinal direction of the connector body 70 is as large as possible.

  By providing the relief portion 77, when the card type light source 6 is fitted to the power supply connector 7, the front surface 70a of the connector main body 70 is from the edge portion of the connector portion 60B of the card substrate 60 by the depth dimension of the relief portion 77. It can be fitted in the approached state. Therefore, even if there is a tolerance or a manufacturing error in the connector main body 70 or the card substrate 60, both connectors can be fitted to a sufficiently deep position, and the half fitting due to the tolerance or the manufacturing error can be prevented in advance. be able to.

  As described above, in the light source unit of the embodiment, when the card type light source is fitted to the card type light source and the card type light source is attached to the base portion, the power supply connector is accommodated in the step portion provided on the base portion. Therefore, the card type light source can be attached closely to the base, and the height dimension of the light source unit can be reduced by the size of the step portion, and there is no need to arrange the feeding connector outside the base portion The size of the light source unit can be reduced.

  Further, in the light source unit of the embodiment, when the card type light source and the power supply connector are fitted, it is possible to visually confirm the fitted state of both by using the alignment groove or the alignment hole. Therefore, even when there is a difference in the sense of the operator for the click feeling between the hooking piece and the hooking groove, the fitting state can be reliably confirmed, and the half fitting can be prevented, and the light source unit has reliability. It can improve.

  In the above embodiment, the light source unit has been described as a configuration including both the alignment groove and the alignment hole (position reference hole) as the alignment reference, but may be configured to include only one of them. In addition, although the alignment groove is cut out from the edge of the card substrate, it may be a long groove formed over a required area including a portion where the front surface of the connector body is located when fitted. Furthermore, the alignment hole is not limited to a circle, and may be a hole of another shape such as a triangular hole, a rectangular hole, or an elliptical hole as long as the relative position to the position reference hole can be determined.

  Furthermore, the alignment means provided on the card type light source is not limited to the alignment groove or alignment hole of the embodiment, and for example, alignment marks using a part of a resist or a conductive film formed on a card substrate The alignment mark may be used to confirm the fitting position of the power supply connector.

  Further, the alignment means in the present invention may be configured to form the alignment hole and the alignment groove of the above-mentioned embodiment in the feeding connector, and confirm the fitting position with the card type light source.

  Although illustration is omitted, when forming a card substrate of a card type light source, usually, a plurality of card substrates are separated and divided and formed from one base plate. At this time, if V grooves are formed on the surface of the base plate and a plurality of card boards are divided and formed using the V grooves, burrs will be generated at the division edge of the portion forming the card edge connector, and the power supply connector by burrs It causes damage to the body and electrical shorts.

  In the present invention, when forming a plurality of card substrates from a base plate, at least an edge portion constituting a card edge connector is formed by shearing by press processing or the like. As a result, generation of burrs at the edge of the card edge connector can be prevented, damage to the feed connector and electrical shorting can be prevented, and the reliability of the light source unit can be improved.

  The present invention is not limited to the light source unit applied to the high beam distribution lamp unit described in the embodiment, but as a light source unit applied to the low beam distribution lamp unit or any other light distribution lamp unit Needless to say, it can be configured.

REFERENCE SIGNS LIST 1 light source unit 2 lamp unit 3 lamp housing 4 projection lens 5 heat sink 6 card type light source 7 power feeding connector 8 reflector 51 base portion 56 step portion 58 position fixing boss 60 card substrate 61 conductive pattern 61 P connector electrode pad 62 light emitting element (light source: LED )
64 card edge connector 65 mounting hole 66 positioning hole 68 alignment hole (alignment means)
69 Alignment groove (alignment means)
70 connector main body 72 recessed groove 73 connector electrode terminal 71 electric cord 76 position reference hole

Claims (10)

  It includes a card type light source in which a light source is mounted on a card substrate and a card edge connector is formed on a part of the card substrate, and a power supply connector engaged with the card type light source by the card edge connector to supply power. A light source unit having a configuration in which the card type light source is attached to a base portion of a lamp, wherein the base portion is formed with a stepped portion in a region corresponding to the power supply connector.   The card type light source is attached in a state where the back surface opposite to the side on which the light source of the card substrate is mounted is in close contact with the main surface of the base portion, the step portion is provided on a part of the main surface The light source unit according to claim 1, wherein the light source unit is formed as a recess that accommodates the connector body of the power supply connector.   The light source unit according to claim 2, wherein a connector body of the power supply connector is not protruded outside the base portion.   The light source unit according to any one of claims 1 to 3, wherein one of the card type light source and the power supply connector is provided with alignment means for confirming an alignment state with the other.   The alignment means is an alignment groove formed in the card type light source and extending in a direction to engage with the feed connector, and the alignment groove is used when the feed connector is properly fitted to the power reception connector. 5. The light source unit according to claim 4, wherein the light source unit is concealed by the power supply connector.   The card-type light source includes a plurality of light emitting elements arranged at different arrangement densities and a plurality of conductive patterns respectively connected to the light emitting elements, and the alignment grooves emit light arranged at a relatively high density The boundary position between the region where the conductive pattern leading to the element is disposed and the region where the conductive pattern leading to the light emitting element disposed at a relatively low density is arranged at the relatively low density The light source unit according to claim 5, wherein the light source unit is provided in an area provided with a conductive pattern connected to the light emitting element.   The alignment means is an alignment hole opened in the card type light source, and arranged in a concentric position with a position reference hole opened in the feed connector, when the feed connector is properly fitted. The light source unit according to claim 4, wherein the light source unit is configured to be observed in the position reference hole.   The light source unit according to claim 7, wherein the alignment hole and the position reference hole are circular holes having substantially the same diameter.   The light source unit according to claim 7, wherein the base portion includes a position fixing boss which is inserted into the alignment hole and the position reference hole in the stepped portion. The feed connector includes a connector body having a flat cylindrical groove into which the card edge connector is inserted, and the connector body is a relief for preventing interference with the card type light source at a portion facing the card type light source The light source unit according to any one of claims 1 to 9, wherein a portion is formed.

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