JPS6242409Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle lamp in which a light shielding plate is disposed in front of the bulb, and relates to the release of heat emitted from the bulb.

In known vehicle lamps, the heat from the bulb is trapped in the lamp chamber, so if a high wattage bulb is used or the lamp itself is thin, there is a risk that the synthetic resin housing etc. may be thermally deformed. There is. Especially in fog lights with wipers, the wiper drive device is installed inside the lamp room, so
The drive is susceptible to thermal effects.

Conventionally, as a countermeasure against this problem, the distance between the reflector and the lens and the distance between the reflector and the housing are increased to reduce the influence of heat, or the housing and the like are made of a material with good heat resistance. However, the former method has the problem of increasing the size of the lamp itself, making it difficult to adopt it for thin lamps. Moreover, in the latter case, a material with good heat resistance must be used, resulting in a problem of high cost.

The present invention was developed by focusing on the above-mentioned problems, and uses a heat pipe to release the heat inside the lamp chamber to the outside, without increasing the size of the lamp itself, and without increasing the housing size. To provide a vehicular lamp which does not need to be made of expensive materials.

In order to achieve this object, the present invention provides a vehicle lamp in which a light-shielding plate is disposed in front of the bulb, in which the heat-receiving part of the heat pipe is removably supported in close contact with the support of the light-shielding plate, and the heat receiving part of the heat pipe is The feature is that the heat radiating part of the pipe protrudes to the rear of the housing.

An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows a fog light with a wiper according to the present invention, 1 is a housing, 2 is a lens that covers the front opening of the housing 1, 3 is a bulb installed inside the housing 1, and 4 is attached to the front of the bulb 3. The light shielding plates 5 are integrated with the light shielding plate 4 and support the light shielding plate 4, 6 is a wiper for wiping the front surface of the lens 2, and 7 is a wiper drive device. Rim 1 connected to housing 1
It is attached to A. Reference numeral 8 denotes a heat pipe provided to radiate heat emitted from the bulb 3 to the outside of the lamp room A. Its heat receiving portion 8A is brought into close contact with the pillar 5 that is integrated with the light shielding plate 4 that receives the heat from the bulb 3, and the heat radiates. The portion 8B penetrates the housing 1 and projects outward, and the heat radiation portion 8B is raised along the back surface of the housing 1. The heat dissipation portion 8B of the heat pipe 8 is provided with a heat dissipation fin 9 for efficient heat dissipation.
The heat pipe 8 is detachably attached to the housing 1, and its heat receiving portion 8A is supported by the support column 5 in close contact with the support column 5.

2 and 3 show the heat receiving part 8 of the heat pipe 8.
An example of a structure in which A is supported on the support of the light shielding plate 4 is shown, and in this example, the heat receiving part 8A of the heat pipe 8
is inserted into the cylindrical part formed by the support 5 and the holder 10 attached thereto, and is closely supported by the support 5, and the adhesion force of the heat receiving part 8A to the support 5 is applied to the elastic force of the holder 10. This is what I asked him to do. That is, a semicircular recess 5a is formed in the support 5. The holder 10 has a semicircular recess 10a.
and U-shaped locking portions 10 on both sides of the recess 10a.
b is formed. Further, the holder 10 is provided with elastic force by providing a slit 10c in the semicircular recess 10a. Then, by locking the U-shaped locking portions 10b of the holder 10 to both side edges of the recess 5a of the support column 5, the holder 10
is attached to the support column 5, and the heat receiving part 8A of the heat pipe 8 is supported in close contact with the support column 5 while being inserted into the cylindrical portion formed by the recess 5a of the support support 5 and the recess 10a of the holder 10. . In addition, since the holder 10 has elastic force, the heat pipe 8
By pulling out the heat pipe 8, the support for the heat receiving portion 8A of the heat pipe 8 is released, allowing the heat pipe 8 to be removed.

In the fog light with a wiper according to the present invention, when the heat from the bulb 3 is transferred to the pillar 5 of the light shielding plate 4,
The heat is applied to the heat receiving portion 8A of the heat pipe 8, which is closely supported by the support column 5. When heat is applied to the heat receiving section 8A of the heat pipe 8, the working fluid in the heat receiving section 8A evaporates, and the steam moves at high speed to the heat dissipating section 8B due to the pressure difference with the heat dissipating section 8B. The outside air is condensed in the heat radiation section 8B, and the latent heat of vaporization is released here. The working fluid condensed in the heat dissipating section 8B is returned to the heat receiving section 8A by capillary action, and is further evaporated.
By repeating movement and condensation, the heat of the bulb 3 is transferred from the heat receiving part 8A to the heat radiating part 8B, and the heat is transferred to the lamp room A.
It is released to the outside. Therefore, the heat of the bulb 3 will not be trapped in the lamp room A.
No thermal deformation occurs in the housing 1, etc. the result,
There is no need to make the housing etc. from an expensive heat-resistant material, or to increase the distance between the reflector and the lens and the distance between the reflector and the housing.

Moreover, since heat is released by the heat pipe 8, the wiper drive device 7 is also no longer affected by heat.

Furthermore, since the heat receiving portion 8A of the heat pipe 8 is brought into close contact with the pillar 5 of the light shielding plate 4, the light distribution of the lamp is not obstructed, and the heat pipe itself can be attached to and detached from the pillar 5 at will. Therefore, the exchange of pipe 3 is not obstructed.

Furthermore, in this embodiment, since the heat dissipating portion 8B of the heat pipe 8 is provided with the heat dissipating fins 9, heat can be dissipated more efficiently.

FIGS. 4 and 5 show other examples of a structure in which the heat receiving portion of a heat pipe is supported by a support. FIG. 4 shows that the pillar 15 of the light shielding plate 4 has a slit 15b to form a half-cylindrical portion 15a that provides elastic force, and a heat receiving portion of a heat pipe is inserted into the half-cylindrical portion 15a for close support. It was supported so that it could be done. In this example, the holder 10 shown in FIGS. 2 and 3 is not required, the number of parts can be reduced, and the support 15a also absorbs a large amount of heat directly from the bulb, so the heat receiving part of the heat pipe Heat transfer to is performed more effectively.

FIG. 5 shows an example in which the support column 25 is attached to the light shielding plate 4 in the vertical direction, and the holder 20, which is provided with a cylindrical portion 20a that has a slit 20b and has an elastic force, is shown in FIG. The cylindrical portion 20a of the holder 20 is tightened together with the support column 25.
The heat-receiving part of the heat pipe is inserted into and closely supported.

It should be noted that the present invention is not limited to the wiper-equipped fog lamp shown in FIG. 1, but can of course be applied to any vehicle lamp equipped with a light shielding plate.

As explained above, according to the present invention, heat from the bulb is released to the outside of the lamp room by using a heat pipe, so it is possible to increase the size of the lamp itself or to make the housing etc. expensive and heat-resistant. There is no need to make materials. In addition, since the heat pipe is attached closely to the support of the lamp, it will not interfere with the light distribution of the light shielding plate, and since the heat pipe itself can be attached to and removed from the lamp, it will not obstruct the replacement of the bulb. do not have.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a fog lamp with a wiper shown as an embodiment of the present invention, Fig. 2 is a perspective view showing an example of a structure in which a heat pipe is closely supported on a pillar of a light-shielding plate, and Fig. 3 is a cross-sectional view of a fog lamp with a wiper as an embodiment of the present invention. Perspective view showing the figure exploded, No. 4
FIG. 5 is a perspective view showing another example of a structure in which a heat pipe is closely supported on a pillar of a light-shielding plate. 1... Housing, 3... Bulb, 4... Light blocking plate, 5... Light blocking plate support, 8... Heat pipe,
8A... Heat receiving part of heat pipe, 8B... Heat dissipating part of heat pipe, 9... Heat dissipating fin.

Claims (1)

[Scope of utility model registration request] In a vehicle lamp in which a light-shielding plate is disposed in front of the bulb, a heat-receiving part of a heat pipe is removably closely supported on the pillar of the light-shielding plate, and a heat-radiating part of the heat pipe is made to protrude to the rear of the housing. Vehicle lighting equipment characterized by: