JP2600269Y2 - Vehicle lighting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention provides a warning display for a driver of a following vehicle by installing a device on a parcel shelf formed inside a rear window behind a seat back of a rear seat of an automobile or the like. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat and thin vehicle lamp used for a sign lamp or the like, and more particularly to a vehicle lamp configured to prevent thermal deformation of a lamp body caused by heating of a light source.

[0002]

2. Description of the Related Art Hitherto, a vehicle lamp called a so-called high-mount stop lamp has been frequently used as a vehicle marker light for giving a warning display to a driver of a following vehicle in order to ensure road traffic safety. ing. As shown in FIG. 6A, this type of vehicle lamp 50 mounts a light source 54 such as a bulb in a lamp room 53 formed by a lamp body 51 and a front lens 52, and also includes a spoiler and a vehicle body. In order to mount the lamp body 51 in the narrow portion A, the lamp body 51 itself is formed to be flat and thin. Recently, a flat and thin vehicle lamp 50 of this type is mounted on a parcel shelf P and a rear window R provided behind a rear seat of an automobile.
It is demanded that the following vehicle be arranged to improve the alertness and visibility of the driver.

[0003]

However, in the above-described conventional vehicle lamp 50, since the lamp body 51 is formed to be flat and thin, the light source 54 housed in the lamp room 53 is a lamp. Since it is close to the inner wall 51a of the chamber 53, there is a problem that the radiant heat of the light source 54 causes the lamp body 51 to be thermally deformed. Therefore, in order to allow the light source 54 to be installed in a narrow body portion A such as between the parcel shelf P and the rear window R as described above, and to have a structure in which the light source 54 is arranged with a margin with respect to the inner wall of the lamp body 51. In the rear part of the lamp body 51, an enlarged light source accommodating portion 53a swelling downward is formed, a light source 54 is erected from below the light source accommodating portion 53a, and only a radiation effective portion of the light source 54 is a light emitting portion B The light-emitting portion is provided with a front lens 52, and the downward bulging portion is accommodated inside the vehicle body C. A vehicular lamp 50 having a large-sized structure D has also been proposed (see FIG. 6B). However, in the case of a vehicular lamp, the light source housing 53 of the lamp body 51 is provided.
and the socket 54a of the light source 54 erected in the light source accommodating portion 53a and the wiring to the socket 54a protrude greatly below the vehicular lamp 50 and interfere with devices on the vehicle body side. Had a problem.

The present invention has been made in view of the above-mentioned problems, and a light source accommodating portion for a lamp body is formed so as to be inclined backward and downward from a lower portion of the lamp body , so that an enlarged portion below the lamp body can be formed. While minimizing formation ,
It is an object of the present invention to provide a vehicular lamp capable of reducing a thermal influence of a light source on a wall of a lamp room.

[0005]

In order to achieve the above-mentioned object, a vehicle lamp according to the present invention has a light source for lighting mounted in a lamp body integrally formed with a reflector, and a light source in front of the light source. In a vehicle lamp in which a light chamber is formed by covering the light emitting portion with a front lens , the front lens is a light emitting portion that irradiates light, and a non-light emitting portion that extends below the light emitting portion. consists of a's extension, the lens corresponds to the extension of the inclined wall is formed in the rear of the lamp <br/> fitting body, wherein the said inclined wall Len
The light source enlargement portion is formed between the light source and the light source, and the light source is mounted on the inclined wall so as to be inclined forward and upward.

[0006]

According to the above construction, since the light source is attached to the inclined wall of the lamp room enlargement portion formed behind the lamp body, the volume of the lamp room is relatively increased, so that the heat effect of the light source on the wall of the lamp room is obtained. And prevents thermal deformation of the lamp body. Therefore, the rear heat radiation effect is enhanced and the lamp body is not thermally deformed. In addition, since the light emitting part of the front lens is flat and thin, it should be installed in a narrow part such as on the parcel shelf formed behind the back seat of the vehicle and be configured as a sign light that gives a warning display to the driver of the following vehicle. Can be. In addition, the front lens is a light emitting unit for irradiating light.
And a lens extension portion which is a non-light emitting portion below the light emitting portion.
Light source through this front lens.
The mounting part of the
Can be.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a vehicle lamp according to the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 denotes a lamp body in which a front lens 2 is provided on a front opening, and a reflector 3 is integrally formed behind the lamp body 1 to constitute a lamp chamber 4. In this embodiment, the reflector 3 has two parabolic reflecting mirror surfaces 5, 5 arranged in parallel in the lateral direction on its inner surface, and a filament is located at a substantially focal point F position of each parabolic reflecting mirror surface 5, 5. Thus, the light source bulbs 6, 6 are arranged in the lamp room 4. The light room 4 extends below the front lens 2 having the light emitting portion 2a corresponding to the narrow mounting space A formed between the parcel shelf P and the rear window R formed behind the rear seat of the vehicle. A lamp room 4 is provided below the lamp body 1 located behind the lens extension 2b.
An inclined wall 7 that is inclined inward and forward is formed, and the lamp room enlarged portion 4a is formed by the inclined wall 7 portion. A bulb 6 serving as a light source is attached to the inclined wall 7 in a forwardly inclined posture, and transmits a reflected light beam passing through the parabolic reflecting mirror surface 5 to the front lens 2.
The light is emitted from the light emitting portion 2a to the front of the lamp.

The bulb 6 is attached to the optical axis L in an inclined position, and the filament position of the bulb 6 is slightly above the horizontal reference H of the vehicular lamp passing through the center of the light emitting portion 2a of the front lens 2. It is supported so as to be located below, and the optical axis L of the bulb 6 and the reflector 3 is inclined with respect to the horizontal reference H.
The lens steps 8, 8,.
Is formed.

The vehicular lamp according to the present invention having the above configuration is mounted and fixed to a vehicle body via a parcel shelf P.
A shade S is interposed between the front side of the parcel shelf P and the lower end of the light emitting portion 2a of the front lens 2 of the vehicular lamp. The shade S is subjected to anti-reflection processing such as embossing on its surface side, and irradiates the shade S with sunlight or the like to cause irregular reflection, and the surface of the front lens 2 shines to drive the following vehicle. It is intended to prevent glare from being mistakenly recognized by a person. Further, a cover C extending rearward from the upper portion of the lamp body 1 is put on, and the rag of the vehicle lamp component is hidden from the interior and exterior of the vehicle, and the appearance is improved.

FIG. 4 shows the structure of a parabolic reflector formed on the inner surface of the reflector. As described above, the vehicle lamp according to the present invention has the lamp body 1 formed to be flat and thin, so that the parabolic reflecting mirror surface 5 is formed on the parabolic curved surface E in which the rear wall of the reflector 3 is curved in the lateral direction. Is formed.
The parabolic reflecting mirror surface 5 according to the present invention is formed with a large number of cylindrical light diffusion steps 9, 9... Extending in the horizontal direction along the parabolic curved surface and extending in the vertical direction at an equal pitch width W. , And has a structure in which a light beam radiated from the bulb 6 is diffusely reflected in each of the light diffusion steps 9, 9,.... The light diffusion steps 9, 9,... Are formed so that the radius of each step curved surface is gradually increased from the inside to the outside of the reflector 3 as desired, so that the light distribution to the front lens 2 becomes uniform. Can also be configured. The light diffusion steps 9, 9,...
Is a device that diffuses and reflects a light beam radiated from the bulb 6, thereby simultaneously exerting a thermal diffusion effect.

Further, a heat diffusion step 10 for diffusing and reflecting heat accompanying the light emission of the bulb 6 is formed on the upper and lower inner wall surfaces of the lamp body 1. In this embodiment, as shown in FIG. 5, the front and rear inner walls of the lamp body 1 correspond to the configuration of the light diffusion steps 9, 9,... Formed on the parabolic reflecting mirror surface 5 of the reflector 3 on the upper and lower inner walls. Are formed in such a manner that a number of cylindrical thermal diffusion steps 10, 10...
By forming a large number of the heat diffusion steps 10, 10,..., The surface area of the upper and lower inner wall surfaces of the lamp body 1 is increased to enhance the heat diffusion effect, and each of the heat diffusion steps 10, 10,.
Can reduce the thermal effect on the inner wall surface of the lamp body 1 and improve the design of the lamp room that is visible through the front lens 2.

[0012]

As described above, the vehicular lamp according to the present invention has a light source in a forwardly inclined position on the inclined wall of the enlarged lamp room formed behind the lens extension formed below the front lens light emitting portion. Because the light source mounting part does not protrude greatly below the vehicle lamp, the lamp room is expanded even in a flat and thin vehicle lamp, and the heat generated by the radiant heat of the bulb is increased. The influence can be reduced, and the vehicle lighting device can be arranged also in a narrow mounting space between the parcel shelf and the rear window formed behind the rear seat of the vehicle, and the usability as a sign light can be improved. . The heat diffusion step formed on the upper and lower inner wall surfaces of the lamp body and the light diffusion step formed on the inner surface of the reflector make it possible to make the front lens surface shine on average by the luminous flux from the bulb. The effect obtained by implementing the method is extremely large.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a vehicular lamp according to the present invention.

FIG. 2 is a plan sectional view of the same.

FIG. 3 is an enlarged vertical sectional view of the same.

FIG. 4 is an enlarged plan cross-sectional view of a main part of a vehicle lamp in which a light diffusion step is applied to a reflector.

FIG. 5 is a perspective view showing a lamp body in which a heat diffusion step is performed on upper and lower inner wall surfaces.

FIG. 6 is a longitudinal sectional view of a conventional vehicle lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp body 2 Front lens 3 Reflector 4 Light room 6 Bulb 7 Inclined wall 8 Lens step 9 Light diffusion step 10 Heat diffusion step

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicular lamp in which a light source for lighting is mounted in a lamp body obtained by integrally molding a reflector, and a front room is covered with a front lens in front of the light source, wherein the front lens includes: A light emitting unit for irradiating light;
Consists of a lens extension which is a non-emitting portion extending downward, the lens extension to form a rear portion inclined wall of the lamp body corresponding, lamp chamber enlarged portion between the and the inclined wall lens extension And the light source is mounted on the inclined wall so as to be inclined upward and forward.