JP2015159055A - Vehicle lamp fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle lamp fitting which improves the cooling performance of a light source and efficiently cools a drive source disposed near a cooling fan.SOLUTION: An LED (a light source) 10, a heat sink 5 which diffuses heat generated by the LED 10, a cooling fan 6 which blows cooling air toward the heat sink 5, and a DC motor (a driving source) 7 disposed near the cooling fan 6 are stored in a housing 2 to form a vehicle lamp fitting 1. A metal distributing plate 9 which contacts with the DC motor 7 is provided in the vehicle lamp fitting 1. Further, a guide part 9c which allows the cooling air from the cooling fan 6 to get into the DC motor 7 is provided in the distributing plate 9.

Description

  The present invention relates to a vehicular lamp including a cooling fan for sending cooling air to a heat sink.

  As a light source for vehicle lamps such as headlamps, LEDs (light emitting diodes) with high luminous efficiency and long durability life are being used instead of conventional bulbs, but when LEDs emit light, high heat is generated, so LEDs Various means for cooling are proposed. As the cooling means, a configuration is adopted in which heat generated by the LED is dissipated to the surroundings by a heat sink, and cooling air is flowed toward the heat sink by a cooling fan to improve heat dissipation of the heat sink (for example, Patent Document 1). reference). Here, such a vehicular lamp will be described with reference to FIG.

  That is, FIG. 5 is a longitudinal sectional view of a main part of a conventional vehicular lamp. In the illustrated vehicular lamp 101, a housing 104 has a substrate 104 on which an LED 103 as a light source is mounted and an LED 103. A heat sink 105 that dissipates heat to the surroundings to suppress the temperature rise of the LED 103, a cooling fan 106 disposed below the heat sink 105, a motor 107 that is a drive source disposed near the cooling fan 106, and the like Contained.

  Thus, heat is generated by supplying current to the LED 103 and causing the LED 103 to emit light. This heat is conducted to the heat sink 105 and dissipated from the heat sink 105 to the surroundings. At this time, since the cooling air is sent from the cooling fan 106 to the heat sink 105 as indicated by an arrow in FIG. 5, the heat sink 105 is cooled by the cooling air, and the heat dissipation is improved. For this reason, LED103 is cooled efficiently and the temperature rise is suppressed, and the fall of the luminous efficiency of this LED103 and a durable life is prevented.

JP 2013-161586 A

  However, in the conventional vehicular lamp 101 shown in FIG. 5, the DC motor 107 disposed in the vicinity of the LED 103 or the heat sink 105 as a heat source is affected by a thermal adverse effect, and the DC motor 107 is caused by the heat generated by itself. However, there is a problem that the durability life and performance are lowered due to an increase in coil temperature and the like.

  The present invention has been made in view of the above problems, and a purpose of the invention is to provide a vehicular lamp that can enhance the cooling performance of the light source and can efficiently cool the drive source disposed in the vicinity of the cooling fan. It is to provide.

  In order to achieve the above object, an invention according to claim 1 includes a light source, a heat sink that dissipates heat generated by the light source, a cooling fan that sends cooling air toward the heat sink, and a proximity of the cooling fan. A vehicular lamp comprising a drive source disposed in a housing is provided with a metal rectifying plate that contacts the drive source.

  According to a second aspect of the present invention, in the first aspect of the present invention, the rectifying plate is provided with a guide portion for receiving cooling air from the cooling fan into the driving source.

  According to the first aspect of the present invention, since the cooling air from the cooling fan collides with the rectifying plate to generate convection, and the heat dissipation of the heat sink is enhanced by this convection, the light source is effectively cooled and its durable life Is increased. Also, the rectifying plate made of metal with high thermal conductivity contacts the drive source and functions as a kind of heat sink, and the heat generated in the drive source is dissipated from the rectifying plate to the surroundings, so the drive source is cooled. The temperature rise is suppressed, and the durability life and performance of the drive source are improved.

  According to the second aspect of the present invention, a part of the cooling air from the cooling fan is introduced into the driving source by the guide portion of the rectifying plate and is used for cooling the driving source and the rectifying plate. The temperature rise is further efficiently cooled.

It is a disassembled perspective view of the vehicle lamp which concerns on this invention. 1 is a front view of a vehicular lamp according to the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is a perspective view of a housing of a vehicular lamp according to the present invention. It is a longitudinal cross-sectional view of the conventional vehicle lamp main part.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is an exploded perspective view of a vehicular lamp according to the present invention, FIG. 2 is a front view of the vehicular lamp, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a perspective view of a housing of the vehicular lamp. FIG.

  A vehicular lamp 1 according to the present embodiment is a projector-type headlamp capable of switching between a light distribution pattern for low beam and a light distribution pattern for high beam, and as shown in FIG. The light source unit 4 and the optical unit 5 are sequentially mounted on the housing 2 by two screws 3.

  The housing 2 is formed in a rectangular box shape that opens upward, and a movable shade 6 is rotatably supported by the housing 2 via a shaft 7. The movable shade 6 switches the light distribution between the low beam light distribution pattern and the high beam light distribution pattern by selectively moving to the low beam position and the high beam position, and the shaft 7 is not inserted into this. The movable shade 6 is biased in the direction toward the low beam position by the illustrated return spring.

  As shown in FIG. 1, the housing 2 houses therein a cooling fan 8 for sending cooling air to the light source unit 4 and a DC motor 9 constituting a drive source for the light distribution control switching means. Has been. Here, the cooling fan 8 is rotationally driven by an electric motor (not shown) incorporated therein. In this embodiment, the DC motor 9 is used as the drive source of the light distribution control switching means, but a solenoid or the like may be used instead.

  As shown in FIGS. 1 and 3, the light source unit 4 includes an LED 10 that is a light source, a substrate 11 on which the LED 10 is mounted, a heat sink 12 that dissipates heat generated by the LED 10 and cools the LED 10, and the like. It consists of The heat sink 12 is integrally formed by aluminum die casting or the like having high thermal conductivity. Further, as shown in FIG. 3, a connector 13 for power feeding is connected to the substrate 11.

  As shown in FIG. 1, the optical unit 5 includes a projection lens 14 and a lens holder 15 for holding the projection lens 14.

  By the way, as shown in FIG. 3, the DC motor 9 as a driving source is housed in a concave motor housing portion 2 a formed in the housing 2, and a part of the housing housing portion 2 a of the housing 2 is accommodated. A vertical portion 16a of a rectifying plate 16 formed by bending a metal plate into a lateral L shape in a side view is attached to the vertical wall 2A. The horizontal portion 16 b of the rectifying plate 16 is in contact with the upper surface of the DC motor 9, and the front end portion of the horizontal portion 16 b that is bent obliquely upward from the upper surface of the DC motor 9 is upward from the cooling fan 8. A guide portion 16c for receiving a part of the cooling air sent (in the direction of the arrow in FIG. 3) into the DC motor 9 is configured.

  Thus, in the vehicular lamp 1 configured as described above, when a current is supplied from the power source (not shown) to the LED 10 on the substrate 11 via the connector 13, the LED 10 emits light and generates heat. However, this heat is conducted to the heat sink 12 and dissipated from the heat sink 12 to the surroundings. At this time, the cooling fan 8 is simultaneously driven, and the cooling air sent upward from the cooling fan 8 collides with the rectifying plate 16 to generate convection. For this reason, the heat dissipation of the heat sink 12 is enhanced, the LED 10 is effectively cooled, and the durability life thereof is enhanced. Further, the cooling air from the cooling fan 8 cools the heat sink 12 in the process of passing through the heat sink 12 and enhances its heat dissipation, so that the LED 10 is efficiently cooled and its temperature rise is suppressed, and the LED 10 emits light. Reduction in efficiency and durability is prevented.

  In the vehicular lamp 1 according to the present embodiment, the horizontal portion 16b of the rectifying plate 16 made of a metal having high thermal conductivity comes into contact with the upper surface of the DC motor 9 and functions as a kind of heat sink. The heat generated at 9 is dissipated from the current plate 16 to the surroundings. For this reason, the DC motor 9 is cooled and its temperature rise is suppressed, and the durable life and performance of the DC motor 9 are improved.

  Furthermore, in the vehicular lamp 1 according to the present embodiment, a part of the cooling air sent upward from the cooling fan 8 is introduced into the DC motor 9 by the guide portion 16c of the rectifying plate 16, and the DC Since the motor 9 and the rectifying plate 16 are used for cooling, the temperature increase of the DC motor 9 is further efficiently cooled.

  In the above, the embodiment in which the present invention is applied to a vehicle lamp using an LED as a light source has been described. However, the present invention is similarly applied to a vehicle lamp using a bulb (light bulb) as a light source. Of course, it is possible. Although the present invention has been described with respect to a form in which the present invention is applied to a projector-type headlamp capable of switching between a low beam light distribution pattern and a high beam light distribution pattern, the present invention can be applied to any other vehicle lamp. Of course, the present invention can be similarly applied.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Housing 2A Vertical wall 2a of housing 2a Motor housing part 3 Screw 4 Light source unit 5 Optical unit 6 Movable shade 7 Shaft 8 Cooling fan 9 DC motor (drive source)
10 LED
DESCRIPTION OF SYMBOLS 11 Board | substrate 12 Heat sink 13 Connector 14 Projection lens 15 Lens holder 16 Current plate 16a Vertical part of current plate 16b Horizontal part of current plate 16c Guide part of current plate

Claims (2)

A vehicle lamp comprising: a light source; a heat sink that dissipates heat generated by the light source; a cooling fan that sends cooling air toward the heat sink; and a drive source disposed in the vicinity of the cooling fan in a housing In
A vehicular lamp characterized by comprising a metal rectifying plate in contact with the drive source. The vehicular lamp according to claim 1, wherein a guide portion for receiving cooling air from the cooling fan into the electric motor is provided on the rectifying plate.

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