JP2811144B2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflector for a vehicular lamp, and more particularly to a vehicle in which a light-blocking rib is formed on an inner surface of a reflector to prevent emission of uncontrolled light from a bulb which causes glare. The present invention relates to lighting fixtures.

[0002]

2. Description of the Related Art Conventionally, as for a fog lamp and other auxiliary headlights, as shown in FIG.
A reflector 52 having a paraboloid of revolution 51 formed therein
A valve 55 integrally mounted on a socket 54 is removably fitted from the rear of a valve insertion hole 53 formed at the rear of the reflector 52, and the rear of the socket 54 is set by a set spring 56. The valve insertion hole 53 is configured to be pressed and locked to the opening edge. The bulb 55 serving as the light source is provided with the filament 5.
Reference numeral 7 denotes a structure which is supported at the substantially focal point F position of the reflector 52 to obtain a predetermined light distribution, and has a structure called a so-called C6 bulb. This valve 5
Due to its configuration, a curved portion 55b facing the rotating parabolic reflecting mirror surface of the reflector 52 is formed at the rear end of the glass sphere 55a. Reference numeral 58 denotes a front lens that covers the front opening of the housing 50.

[0003]

Therefore, in the vehicular lamp of the above construction, when the bulb 55 is turned on, the emitted light transmitted through the curved portion 55b formed at the rear end of the glass bulb 55a is generated. There is a problem that glare light is generated due to irregular reflection at the component part 55b, and a reference light distribution required as a vehicle lamp cannot be obtained at this part depending on the rotating parabolic reflecting mirror surface 51 of the reflector 52. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is intended to prevent light generated from a curved portion formed at the rear end of a glass bulb of a bulb to thereby prevent the generation of glare light. It is an object of the present invention to provide a vehicular lamp capable of obtaining a preferable light distribution as a vehicular lamp.

[0005]

In order to achieve the above object, a vehicular lamp according to the present invention is provided with a bulb insertion hole formed at the rear of a reflector having a rotating parabolic reflector, and the bulb insertion hole is formed. In a vehicle lamp, a light source bulb is detachably mounted at a substantially focal position of the reflector via a light-shielding rib integrated with the reflector at a peripheral portion of the bulb insertion hole on the inner surface of the reflector. The light-shielding rib is formed so that the tip thereof protrudes to a light-shielding position with respect to the outgoing light transmitted through the curved portion formed at the rear end of the glass bulb of the bulb. The gist of the present invention is that it is formed so as to be inclined inward of a light-shielding line connecting the focal positions.

[0006]

According to the above construction, the light emitted from the curved portion formed at the rear end of the glass bulb of the bulb is cut by the light-shielding rib formed at the periphery of the inner bulb insertion hole of the reflector. The generation of glare light emitted from the curved portion is prevented. Further, since the legs of the light-blocking ribs are inclined inside the light-blocking line, the reflection performance of the outer surface of the legs is improved, and the occurrence of dark portions on the inner surface of the reflector is prevented.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicular lamp according to an embodiment of the present invention. 1 and 2 show a cross section of a main part of a reflector included in a vehicular lamp according to the present invention. Reference numeral 1 denotes a reflector having a rotating parabolic reflecting mirror surface 2 formed on an inner surface thereof. In this reflector 1, a valve insertion hole 3 is opened at the rear of the reflector 1 located at the bottom of the parabolic mirror 2, and a bulb 5 formed integrally with the socket 4 is fitted from the rear, and the socket 4 is connected to the bulb. A linear or plate-like set spring 7 is configured to be detachably pressed and fixed to a valve support edge 6 formed at the rear edge of the insertion hole 3.

The bulb 5 mounted on the vehicular lamp according to the present invention is a so-called C6 bulb. Due to its structure, the rear end of the glass bulb 5a has a cylindrical light emitting portion in a side view. Is formed, and the irradiation effective light emitted from the filament 5c is emitted from the light emitting section. Thus, the bulb 5 is mounted so that the filament 5c is supported at a substantially focal point F position of the parabolic mirror 2 of the reflector 1.

A light shielding rib 8 is provided upright on the inner peripheral edge of the valve insertion hole 3 of the reflector 1 configured as described above. The light-shielding rib 8 is for shielding light emitted from the curved portion 5b formed at the rear end of the glass bulb 5a of the bulb 5 from light. 2 is formed so as to protrude to a height at which light emitted from the bulb 2 through the curved portion 5b of the bulb 5 can be shielded, and the leg of the light-shielding rib 8 has its tip 8a and the reflector 1
Is formed so as to incline to the inside of the light-shielding line S1 connecting the focal point F, and its outer surface 8b forms an internal reflection surface. Due to the internal reflection surface formed by the outer surface 8b of the light shielding rib 8, the rotating parabolic reflection mirror surface 2 of the reflector
Can be prevented from enlarging a dark portion generated at the bottom of the image. Further, by forming the light-shielding ribs 8, the opening diameter of the opening edge with respect to the rear portion of the reflector 1 can be increased, so that the plate-shaped or other set springs 7 can be formed longer, and the spring strength can be increased. .

Therefore, when the bulb 5 is turned on, the light beam emitted from the curved portion 5b formed at the rear end of the glass bulb 5a of the bulb 5 is shielded by the light-shielding rib 8, and the parabolic reflection of the reflector 1 is reflected. An uncontrollable glare light is prevented by forming a light blocking area S2 for the mirror surface 2. Also,
The outer surface 8b of the light-shielding rib 8 has an interreflection effect with the rotating parabolic reflecting mirror surface 2 of the reflector 1 when the bulb 5 is turned on, thereby preventing the occurrence of a dark portion due to the portion.

FIGS. 3 and 4 show a first embodiment of the structure of the inner surface of the reflector. Rotating parabolic reflecting mirror surface 2 formed on the inner surface of reflector 1 according to the present embodiment
Is a so-called wave-shaped diffuse reflection step 2a, in which convex and concave curved surfaces extending in the horizontal direction along the paraboloid of revolution repeat at equal pitches in the vertical direction.
Each of the convex diffuse reflection steps 2a has a diffusion rate of approximately 1 ° to 3 ° in the vertical direction (see A in FIG. 4). Therefore, as shown in FIG. 5, the light distribution pattern P2 before the front lens is mounted by the rotating parabolic reflecting mirror surface 2 of the reflector 1 having the above-described configuration is approximately 1 ° in the vertical direction as compared with the normal light distribution pattern P1. In the state where the front lens is attached to the reflector 1, the light is diffused in the range of ３3 ° and 1.5 to 2 in the case of the normal light distribution pattern P1 (1 ° to 5 °) as shown in FIG. A 0.5 times diffused light distribution pattern P2 (6 ° to 9 °) can be obtained. As a result, the maximum luminous intensity can be reduced and an appropriate luminous intensity as a vehicle lamp can be obtained. The front lens has a function of diffusing in the left-right direction.

That is, according to the reflector 1 having the above structure,
For example, as with recent fog lamps, the conventional yellow globe (standard luminous intensity as a vehicular lamp is defined with the yellow glove attached) is eliminated and white light is irradiated (cleared). In this case, it is possible to prevent occurrence of a state in which the maximum luminous intensity greatly exceeds the conventional standard luminous intensity, and to improve the standard conformity. In addition, since the irradiation area on the road surface is extended to the front side of the vehicle by such a configuration, the visibility can be significantly improved as compared with the conventional lamp.

FIGS. 7 to 9 show a second embodiment relating to the structure of the inner surface of the reflector. Only parts different from the first embodiment will be described. Rotating parabolic reflecting mirror surface 2 formed on the inner surface of reflector 1 according to the present embodiment
Is formed by arranging a large number of diffuse reflection steps 2a, 2a... Formed in a convex shape along the surface of the paraboloid of revolution, and each convex diffuse reflection step 2a, 2a.
Is formed so as to have a diffusion rate of approximately 1 ° to 3 ° in the vertical direction (A in FIG. 8) and approximately 10 ° to 40 ° in the horizontal direction (B in FIG. 9). Therefore, according to the rotating parabolic reflecting mirror surface 2 of the reflector 1 having the above-described configuration, 1 ° to 3 ° in the vertical direction and 10 ° to 40 ° in the horizontal direction as shown in FIG.
The light distribution pattern P2 diffused into the reflector 1 can be obtained, and the maximum luminous intensity can be reduced similarly to the reflector 1 according to the first embodiment, and an appropriate luminous intensity as a vehicle lamp can be obtained.

FIG. 11 is a schematic explanatory view showing an embodiment relating to a method of forming a front lens mounted on a vehicle lamp according to the present invention. The front lens 9 mounted on the vehicle lamp according to the present embodiment has a rotating parabolic reflecting mirror surface 2 formed on an inner surface thereof, and a housing (not shown) for housing the reflector 1 having a structure for emitting a parallel light beam to the front of the lamp. And a diffusion lens step 9a called a so-called fish-eye lens, which is divided in a lattice pattern in the vertical and horizontal directions on the inner surface thereof. , 9a... Are formed.

Each of the diffusion lens steps 9a, 9a...
Is approximately 10 ° to 40 ° in the left-right direction in the present embodiment,
Further, it is formed so as to have a light diffusion rate of approximately 1 ° to 3 ° in the vertical direction, and in the left-right direction as compared with a conventional light distribution pattern by a front lens configured to have a diffusion function only in the left-right direction. Approximately 10 ° to 40 ° and approximately 1 ° vertically
It is possible to obtain a light distribution pattern with an improved diffusion rate of 3 °. Therefore, by using the front lens 9 having the above-described configuration, the light flux emitted from the bulb 5 can be diffused, the maximum luminous intensity can be reduced and the conformity to the light distribution performance standard on the road surface can be improved, and the road surface can be improved. To improve visibility. The front lens 9 according to the present embodiment can be modified as a front lens of a lamp in which the lamp body is integrally formed with the reflector.

[0016]

As described above, the vehicular lamp according to the present invention has a structure in which a light-shielding rib is provided upright at the peripheral portion of the inner bulb insertion hole of the reflector, and the glass bulb of the bulb is formed by the light-shielding rib. The light emitted from the curved portion formed at the rear end can be cut to prevent the generation of glare light emitted from the curved portion, and the legs of the light shielding ribs are inclined inside the light shielding line. Therefore, the reflection performance on the outer surface of the leg is improved, and the occurrence of a dark portion on the inner surface of the reflector can be prevented.

Also, in a vehicular lamp using a so-called C6 bulb as a light source, the luminous flux emitted from the bulb is diffused in a desired range to reduce the illuminance thereof, and the vehicle lamp has a light distribution performance standard on a road surface. It is useful as a structure of an auxiliary headlight such as a recent fog lamp or the like in which colored gloves are eliminated and clear, and the effect obtained by implementing the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a reflector included in a vehicular lamp according to the present invention.

FIG. 2 is an enlarged vertical sectional view of the main part.

FIG. 3 is a schematic front view showing a first embodiment of the structure of the reflector.

FIG. 4 is a longitudinal sectional view of the same.

FIG. 5 is an explanatory diagram showing a light distribution pattern of a reflector.

FIG. 6 is an explanatory diagram showing a light distribution pattern of the reflector.

FIG. 7 is a schematic front view showing a second embodiment relating to the structure of the reflector.

FIG. 8 is a longitudinal sectional view of the same.

FIG. 9 is a transverse sectional view of the same.

FIG. 10 is an explanatory diagram showing a light distribution pattern of a reflector.

FIG. 11 is a schematic front view showing the structure of a front lens.

FIG. 12 is a longitudinal sectional view showing a conventional vehicle lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reflector 2 Rotating parabolic reflecting mirror surface 5 Bulb 5a Glass ball 5b Curved part 5c Filament 7 Set spring 8 Light-shielding rib 8a Tip 8b Outer surface 9 Front lens

Claims (1)

(57) [Claims] 1. A valve insertion hole is formed at a rear portion of a reflector having a parabolic mirror, and a light source bulb is detachably mounted at a substantially focal position of the reflector via the valve insertion hole. In the vehicular lamp, a light-shielding rib formed integrally with the reflector is formed at a peripheral portion of the bulb insertion hole on the inner surface of the reflector, and a bent portion formed at the rear end of the bulb of the bulb with the tip of the light-shielding rib is formed. The vehicle is characterized in that it is formed so as to protrude to a light-shielding position for transmitted outgoing light, and that a leg of the light-shielding rib is inclined inward of a light-shielding line connecting the tip and the focal point of the reflector. Lights.