JP5526966B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp applied to a vehicle.

  As a vehicular lamp, for example, in Patent Document 1 below, a reflection unit that reflects light from a light source unit forward and a fin unit that is attached to the light source unit and serves as a heat dissipation unit that dissipates heat generated from the light source unit. Is disclosed.

JP 2004-1111297 A

  By the way, in the above-mentioned conventional vehicle lamp, since it is premised that the heat from the light source part is radiated only at the fin part, especially when the light quantity is increased by providing a plurality of light sources or the like, The amount of generated heat becomes enormous and the fin portion needs to be enlarged, leading to an increase in the overall size of the lamp.

  Accordingly, an object of the present invention is to be able to cope with an increase in the amount of heat generation while suppressing an increase in the size of the entire lamp.

The present invention has a support member that absorbs heat generated in the light generation unit while supporting the light generation unit including the light source and the electronic circuit board to which the light source is attached , and the support member reflects light from the light source. A vehicular lamp that is integrally provided with a reflecting portion , wherein the supporting member is formed continuously with a substrate supporting portion that contacts a back surface opposite to the light source of the electronic circuit substrate, and the substrate supporting portion. A sandwiching part that sandwiches the electronic circuit board from both sides, and a reflection part that is formed continuously with the sandwiching part and covers the light source, and the sandwiching part constitutes a part of the board support part to form an electronic circuit board A lower plate portion that is in contact with the back surface on the opposite side of the light source, and an upper plate portion that is in contact with the light source side surface of the electronic circuit board in succession to the reflection portion. The circuit board is sandwiched from both sides .

According to the present invention, the heat generated in the light generation unit including the light source is radiated to the support member that supports the light generation unit, and the reflection unit and the support member are provided integrally with the support member. The heat conductivity between the two and the reflector is improved so that heat can be efficiently dissipated even at the reflector. It is possible to cope with an increase in quantity.
In the present invention, the light generation unit includes an electronic circuit board to which a light source is attached, and the back surface of the electronic circuit board opposite to the light source is in contact with the support member. Therefore, a part of the electronic circuit board can be supported by the support member, and the generated electronic circuit board can be efficiently radiated to the support member.
Moreover, in this invention, the supporting member is provided with the clamping part which clamps one part except the light source of a light generation part from both sides. For this reason, the electronic circuit board can be fixed and held with high accuracy by the sandwiching portion, and heat generated from the electronic circuit substrate can be efficiently radiated to the sandwiching portion. By accurately fixing and holding the electronic circuit board, it is possible to secure mutual positional accuracy between the light source and the reflecting portion, so that the radiation direction of the light reflected by the reflecting portion can be stabilized.
Further, in the present invention, the support member includes a substrate support part that contacts the back surface opposite to the light source of the electronic circuit board, and a part of the support member that is formed continuously with the substrate support part except for the light source. And a reflection part that is formed continuously from the clamping part and covers the light source. For this reason, without providing a heat radiating part such as a dedicated heat radiating fin, the board support part, the sandwiching part, and the reflecting part can be a heat radiating part to form a large heat radiating area and efficiently generate heat generated from the light generating part. It can dissipate heat well.

It is AA sectional drawing of FIG. 2 which shows the vehicle lamp concerning one Embodiment of this invention. It is a front view of the vehicle lamp periphery in a vehicle provided with the vehicle lamp of FIG. (A) is a perspective view of the daylight lamp in the vehicle lamp of FIG. 1, (b) is an exploded perspective view of the daylight lamp. It is a perspective view corresponding to Drawing 3 (b) showing other embodiments.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 2, a daylight lamp 3 shown in FIG. 3A is provided on the upper part of a headlamp 1 provided as a vehicle, for example, at the front of an automobile. In FIG. 1, which is a cross-sectional view taken along the line AA of FIG. 2, the direction indicated by the arrow FR is the front of the vehicle, and the direction indicated by the arrow UP is the upper side of the vehicle.

  Daylight lamps are applied to vehicles such as passenger cars, trucks, taxis, and motorcycles as lamps that are lit during the day. When a vehicle equipped with a daylight lamp is viewed during traveling, the vehicle is easily visible by turning on the daylight lamp. However, since it continues to be lit during the daytime, battery consumption is severe and LED lamps that save power are generally employed.

  As shown in FIG. 3B, the daylight lamp 3 described above includes a plurality of (here, three) LEDs 5 as light sources and an electronic circuit board 7 to which the LEDs 5 are attached. It has a unit 9 and a support member 11 attached to support the lamp unit 9.

  As shown in FIG. 1, the support member 11 includes a substrate support portion 13 that contacts the electronic circuit board 7 and a clamping portion that is located on the vehicle rear side of the substrate support portion 13 and sandwiches an end portion of the electronic circuit board 7. 15 and a reflecting portion 17 that is located on the vehicle front side of the sandwiching portion 15 and reflects the light of the LED 5.

  The substrate support portion 13 of the support member 11 is formed in a rectangular plate shape that is long in the vehicle width direction (direction orthogonal to the paper surface in FIG. 1) corresponding to the arrangement direction of the plurality of LEDs 5, and the electronic circuit board 7. The upper surface is provided with a substrate contact surface 13a that contacts the back surface 7a opposite to the LED 5 provided on the upper surface.

  The holding portion 15 of the support member 11 includes a lower plate portion 15a including an end portion that is a part of the substrate support portion 13 on the vehicle rear side (left side in FIG. 1), and an end portion on the vehicle rear side of the lower plate portion 15a. And an upper plate portion 15c extending from the upper end portion of the end plate portion 15b toward the front of the vehicle (right side in FIG. 1). That is, the lower plate portion 15 a of the sandwiching portion 15 is formed continuously and integrally with the substrate support portion 13.

  The gap between the lower plate portion 15a and the upper plate portion 15c in the clamping portion 15 is substantially equal to the thickness of the electronic circuit board 7. Therefore, by inserting the lamp unit 9 through the opening 19 in front of the support member 11 as shown in FIG. 3B, the end of the electronic circuit board 7 is connected to the lower plate 15a and the upper plate as shown in FIG. It is sandwiched and held between the portion 15c.

  Further, as shown in FIG. 3, three reflecting portions 17 of the support member 11 are provided corresponding to the plurality of LEDs 5, and are formed continuously and integrally with the upper plate portion 15 c of the sandwiching portion 15. . The reflecting portion 17 includes a reflecting surface 17a that covers the LED 5 and has a concave curved surface on the LED 5 side.

  The support member 11 configured as described above is integrally formed of a member having high heat transfer efficiency, for example, a metal such as aluminum. Further, the reflection surface 17a is formed in a concave curved surface that reflects the light of the LED 5 toward the front of the vehicle indicated by the arrow B in FIG. 1, and a reflection film is attached to the surface of the concave curved surface. Or, mirror finish is given.

  Such a daylight lamp 3 has its support member 11 fixed to a mounting bracket 25 shown in FIG. A transparent resin plate (or glass plate) 21 shared with the headlamp 1 is disposed in front of the opening 19.

  Next, the operation will be described. When the LED 5 is turned on, the daylight lamp 3 reflects the light generated by the LED 5 on the reflecting surface 17a and irradiates the front of the vehicle as indicated by an arrow B in FIG.

  When such a daylight lamp 3 is lit, the LED 5 and the electronic circuit board 7 constituting the lamp unit 9 generate heat. In particular, when the vehicle is used or running, it keeps lighting even during the daytime. The heat generated from the lamp unit 9 is directly absorbed by the substrate support portion 13 that is in contact with the back surface 7a of the electronic circuit substrate 7, and is radiated to the outside.

  In addition, since the clamping unit 15 supports the electronic circuit board 7 so as to be wound around, the clamping unit 15 fixes the electronic circuit board 7 with high accuracy and also generates heat generated from the electronic circuit board 7 with the above-described board support unit 13. Similarly, it absorbs directly and dissipates heat to the outside. Furthermore, the reflection part 17 provided with the reflection surface 17a reflects the light generated from the LED 5 by the reflection surface 17a and indirectly absorbs the heat generated from the lamp unit 9 and dissipates it to the outside.

  At this time, the substrate support portion 13 and the sandwiching portion 15 that are in contact with the electronic circuit board 7 are at a higher temperature than the reflection portion 17 that is not in most contact with the electronic circuit board 7. Part of the heat absorbed by the sandwiching part 15 is transmitted to the reflection part 17 and radiated to the outside.

  That is, in the present embodiment, the entire support member 11 including the reflection portion 17 is a heat dissipation portion, and heat generated in the lamp unit 9 including the LEDs 5 is radiated to the support member 11 supporting the lamp unit 9. At the same time, by providing the reflection portion 17 integrally with the support member 11, the thermal conductivity between the reflection portion 17 and the support member 11 is improved, and the reflection portion 17 also efficiently dissipates heat.

  For this reason, a heat radiating area can be formed large without providing a separate heat radiating part such as a dedicated heat radiating fin, and the heat generated from the lamp unit 9 can be efficiently radiated. As a result, the number of parts is reduced, the structure is simplified, and it is possible to cope with an increase in the amount of heat generated while suppressing an increase in the size of the entire vehicular lamp.

  In the present embodiment, the lamp unit 9 includes the electronic circuit board 7 on which the LEDs 5 are attached, and the back surface 7 a opposite to the LEDs 5 of the electronic circuit board 7 is in contact with the support member 11. Therefore, a part of the electronic circuit board 7 can be supported by the support member 11, and the heat generated electronic circuit board 7 can be efficiently radiated to the support member 11.

  Moreover, in this embodiment, the supporting member 11 is provided with the clamping part 15 which clamps a part except LED5 of the lamp unit 9 from both sides. For this reason, the electronic circuit board 7 can be fixed and held with high precision by the sandwiching part 15, and heat generated from the electronic circuit board 7 can be efficiently radiated to the sandwiching part 15. By accurately fixing and holding the electronic circuit board 7, mutual positional accuracy between the LED 5 and the reflecting surface 17 a can be secured, so that the radiation direction of the light reflected by the reflecting surface 17 a can be stabilized.

  Further, in the present embodiment, the support member 11 is formed continuously with the substrate support portion 13 that contacts the back surface 7a opposite to the LED 5 of the electronic circuit board 7 and the LED support 5 of the lamp unit 9. A sandwiching portion 15 that sandwiches a portion other than the both sides from both sides, and a reflection portion 17 that is formed continuously with the sandwiching portion 15 and covers the LED 5. For this reason, without providing a heat radiating portion such as a dedicated heat radiating fin, the substrate support portion 13, the sandwiching portion 15, and the reflection portion 17 can be formed as a heat radiating portion so that a large heat radiating area can be formed. Heat can be radiated efficiently.

  FIG. 4 is a perspective view corresponding to FIG. 3 showing another embodiment. In this embodiment, a heat radiating fin 27 is additionally provided on the surface of the reflecting portion 17. Thereby, the heat dissipation effect can be further enhanced.

  In the above-described embodiment, the daylight lamp 3 is provided on the vehicle front side, but may be provided on the vehicle rear side.

5 LED (light source)
7 Electronic circuit board 7a Back surface of electronic circuit board 9 Lamp unit (light generation part)
DESCRIPTION OF SYMBOLS 11 Support member 13 Substrate support part of support member 15 Holding part of support member 17 Reflection part of support member

Claims (1)

A light generation unit including a light source and an electronic circuit board on which the light source is mounted; and a support member that absorbs heat generated in the light generation unit while supporting the light generation unit so as to cover the light generation unit. Is a vehicular lamp that is integrally provided with a reflecting portion that reflects light from the light source ,
The support member includes a substrate support portion that contacts a back surface opposite to the light source of the electronic circuit board, a sandwich portion that is formed continuously with the substrate support portion and sandwiches the electronic circuit substrate from both sides, and the sandwiching portion. And a reflection part that is continuously formed on the part and covers the light source.
The sandwiching portion constitutes a part of a substrate support portion and contacts a lower plate portion that is in contact with a back surface on the opposite side of the light source of the electronic circuit board, and the light source side of the electronic circuit substrate that is continuous with the reflection portion. And an upper plate part that contacts the surface of the electronic circuit board, wherein the electronic circuit board is sandwiched between the lower plate part and the upper plate part .

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