JP2016122503A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a lighting fixture to be easily configured and enable an electronic circuit board supplying electrical power for LED of light radiation to be prevented from becoming excessive high temperature further positively even under application of a simple configuration.SOLUTION: A lighting fixture comprises: an electronic circuit board 14 supported at a stationary member 15; a driver circuit 22 installed on one surface of both surfaces of the board 14 and supplying electrical power from outside to a light radiation LED 21 through the board 14; a shield cover 24 covering the driver circuit 22 to shut off electromagnetic wave from outside; and a cooling plate 25 fixed to the other surface of the board 14 to radiate heat generated at the board 14. The shield cover 24 is formed by bending an extending part 33 integrally extending from the cooling plate 25.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lamp in which a driver circuit for supplying power to an irradiation LED through an electronic circuit board is covered with a shield cover for shielding electromagnetic waves.

  Conventionally, there is a vehicle lamp disclosed in Patent Document 1 below. According to this publication, the lamp includes an electronic circuit board supported by a lamp housing which is a stationary member, and an irradiation LED (light emitting diode) attached to the board. Then, when electric power from the outside is supplied to the LED through the substrate, the LED emits light, and a predetermined direction of the vehicle is irradiated.

  Further, the lamp is usually attached to the substrate, a driver circuit that supplies power from the outside to the irradiation LED through the substrate, a shield cover that covers the driver circuit and blocks external electromagnetic waves, And a cooling plate that radiates heat generated during energization of the substrate. The driver circuit is prevented from malfunctioning by blocking electromagnetic waves directed to the driver circuit by the shield cover, and the LED operates properly. Further, the substrate is prevented from being overheated due to heat radiation by the cooling plate, and the life is improved.

JP 2011-129475 A

  By the way, the above-mentioned conventional lamp is required to have a simpler configuration by reducing the number of components. On the other hand, it is also required to improve the effect of heat dissipation by the cooling plate to prevent the substrate from being overheated more reliably. To realize this, however, the cooling plate is simply enlarged. If so, the configuration of the lamp may be complicated, which is not preferable.

  The present invention has been made paying attention to the above situation, and the object of the present invention is to make it possible to simplify the configuration of the lamp, and even in this case, the power of the LED for irradiation can be reduced. It is to be able to more reliably prevent the electronic circuit board responsible for supply from being overheated.

According to the first aspect of the present invention, the electronic circuit board 14 supported by the stationary side member 15 and one of both surfaces of the board 14 are installed, and the LED 21 for irradiating external power through the board 14 is provided. A driver circuit 22 supplied to the substrate, a shield cover 24 that covers the driver circuit 22 and shields electromagnetic waves from the outside, and a cooling plate that is attached to the other surface of the substrate 14 and radiates heat generated by the substrate 14 And a lamp with 25,
The lamp cover is characterized in that the shield cover 24 is formed by bending of an extending portion 33 that integrally extends from the cooling plate 25.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 is an electronic circuit board supported by a stationary member and a driver installed on one of both surfaces of the board and supplying electric power from the outside to the irradiation LED through the board In a lamp provided with a circuit, a shield cover that covers the driver circuit and shields electromagnetic waves from the outside, and a cooling plate that is attached to the other surface of the substrate and dissipates heat generated by the substrate,
The shield cover is formed by bending of an extending portion that extends integrally from the cooling plate.

  For this reason, as described above, a reduction in the number of parts of the lamp is achieved by integrally forming the cooling plate for heat dissipation of the substrate and the shield cover for protecting the driver circuit from electromagnetic waves. Can be easy.

  On the other hand, since the shield cover is integrally formed on the cooling plate as described above, the heat dissipation area of the cooling plate is substantially increased by the shield cover 24. In addition, the shield cover covers a driver circuit installed on one surface of the substrate, while the cooling plate is attached to the other surface of the substrate, and includes the shield cover and the cooling plate. Means that the heat radiation by the shield cover and the heat radiation by the cooling plate are prevented from interfering with each other.

  Therefore, as described above, it is possible to more reliably prevent the substrate from being overheated due to heat radiation by the shield cover and the cooling plate, although the configuration of the lamp is simplified.

It is a perspective view of the main part of a lamp. It is side surface sectional drawing of a lamp. FIG. 2 is a developed perspective view of what is shown in FIG. 1.

  With regard to the lamp of the present invention, the configuration of the lamp can be simplified, and even in this case, the electronic circuit board responsible for supplying power to the irradiation LED can be more reliably prevented from being overheated. In order to realize the object of enabling, the form for carrying out the present invention is as follows.

  That is, the lamp is an electronic circuit board that is supported by the stationary member, a driver circuit that is installed on one of both surfaces of the board, and that supplies electric power from the outside to the irradiation LED through the board. And a shield cover that covers the driver circuit and shields electromagnetic waves from the outside, and a cooling plate that is attached to the other surface of the substrate and radiates heat generated by the substrate. The shield cover is formed by bending of an extending portion that extends integrally from the cooling plate.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  1 and 2, reference numeral 1 denotes a vehicle, and an arrow Fr indicates the front in the traveling direction of the vehicle 1.

  The front portion of the vehicle body 2 of the vehicle 1 includes a front bumper 3 and a front hood 4 positioned above the front bumper 3, and is disposed between the front bumper 3 and the front hood 4 so as to be in front of the vehicle 1. A lamp 5 for the vehicle 1 that is a headlamp that can irradiate is provided.

  The lamp 5 is supported on the vehicle body 2 side and is made of a resin-made lamp-shaped lamp housing 8 that opens toward the front, a lamp lens 9 that closes the opening of the lamp housing 8 and is supported at the opening edge thereof, A lamp-shaped reflector 10 provided inside the lamp housing 8 and supported by the lamp housing 8 and opening forward is provided, and a light source 11 supported by the lamp housing 8 is provided.

  The light source 11 includes an electronic circuit board 14 that extends substantially horizontally in the front-rear direction. The substrate 14 is supported by the support 16 on the lamp housing 8, the rear end of which is the stationary member 15 of the lamp 5, and the front end of the substrate 14 passes through the through hole 17 formed in the reflector 10. 18 is arranged.

  The light source 11 is one of the two surfaces of the irradiation LEDs 21 and 21 that are the main body of the light source 11 attached to the upper and lower surfaces of the front end portion of the substrate 14 and the midway portion of the substrate 14 in the front-rear direction. A driver circuit 22 installed on the upper surface, a socket 23 formed integrally with the support member 16 and electrically connected to the LEDs 21 through the substrate 14, and the driver circuit 22 from above. The heat is generated when energized between the board 14 and each LED 21, and is attached to a shield cover 24 that shields electromagnetic waves directed from the outside toward the driver circuit 22 and a lower surface that is the other surface of the board 14. And a cooling plate 25 for radiating heat.

  The shield cover 24 is disposed in a space 28 sandwiched between the lamp housing 8 and the reflector 10. A connector 30 connected to the end of the lead wire 29 is detachably connected to the socket 23. Electric power from the outside is supplied to the driver circuit 22 through the lead wire 29, the connector 30, the socket 23, and the board 14, and is supplied from the driver circuit 22 through the board 14 to each LED 21. Irradiates the front of the vehicle 1 in the desired direction.

  A cover body 31 is provided in the vicinity of the front of the front end of the substrate 14 and the LEDs 21 so as to cover the LEDs 21 from the front. The cover body 31 extends in the width direction of the vehicle body 2 and is supported at both ends by the reflector 10. According to the cover body 31, the front end portion of the substrate 14 and the LEDs 21 are prevented from being easily seen from the front of the lamp 5, and the appearance of the lamp 5 is improved in appearance.

  The base material of the substrate 14 is made of bakelite or resin. The shield cover 24 has a box shape that opens downward, and the cooling plate 25 is soldered so as to be in surface contact with the lower surface of the substrate 14. The shield cover 24 and the cooling plate 25 are formed integrally with each other, and are made of a metal such as aluminum or copper that easily conducts heat.

  In FIG. 3, the shield cover 24 is formed by bending an extension portion 33 that integrally extends from the cooling plate 25. The bent portion in the extended portion 33 is indicated by a two-dot chain line in FIG. The cooling plate 25 and the extending portion 33 are integrally formed by shearing one flat plate material.

  According to the above configuration, the shield cover 24 is formed by bending the extending portion 33 that integrally extends from the cooling plate 25.

  Therefore, as described above, a reduction in the number of parts of the lamp 5 is achieved because the cooling plate 25 for heat dissipation of the substrate 14 and the shield cover 24 that protects the driver circuit 22 from electromagnetic waves are integrally formed. The configuration of the lamp 5 can be simplified.

  On the other hand, since the shield cover 24 is formed integrally with the cooling plate 25 as described above, the heat dissipation area of the cooling plate 25 is substantially increased by the shield cover 24. Moreover, the shield cover 24 covers the driver circuit 22 installed on one surface of the substrate 14, while the cooling plate 25 is attached to the other surface of the substrate 14, Since the shield cover 24 and the cooling plate 25 are allocated and arranged with respect to the substrate 14, the heat radiation by the shield cover 24 and the heat radiation by the cooling plate 25 are prevented from interfering with each other.

  Therefore, as described above, while the structure of the lamp 5 is simplified, it is possible to more reliably prevent the substrate 14 from being overheated due to heat radiation by the shield cover 24 and the cooling plate 25.

  One surface of the substrate 14 may be the lower surface of the substrate 14 and the other surface may be the upper surface of the substrate 14. The substrate 14 may be a vertical plate. The shield cover 24 does not need to cover the driver circuit 22 as a whole, and may cover only a part of the driver circuit 22 so as to face the direction of the electromagnetic wave toward the driver circuit 22. Good.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 5 Lamp 8 Lamp housing 9 Lamp lens 10 Reflector 11 Light source 14 Board | substrate 15 Stationary side member 21 LED
22 Driver Circuit 23 Socket 24 Shield Cover 25 Cooling Plate 28 Space 29 Lead Wire 30 Connector 33 Extension

Claims (1)

An electronic circuit board supported by the stationary member, a driver circuit that is installed on one of both surfaces of the board, and that supplies electric power from the outside to the irradiation LED through the board, and this driver circuit In a lamp provided with a shield cover that covers and shields electromagnetic waves from the outside, and a cooling plate that is attached to the other surface of the substrate and dissipates heat generated by the substrate,
A lamp characterized in that the shield cover is formed by bending of an extending portion that integrally extends from the cooling plate.

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