JPH0757516A - Light fixture for vehicle - Google Patents

Abstract

PURPOSE:To prevent the occurrence of glare light and provide preferable light distribution by forming a shielding rib at the rear end of a bulb insertion hole on the inner face of a reflector, and cutting the light emitted from a curve section at the rear end of the glass tube of a bulb. CONSTITUTION:A shielding rib 8 is erected on the inside peripheral edge of the bulb insertion hole 3 of a reflector 1 formed with a rotational parabolic reflecting mirror face 2. The tip 8a of the shielding rib 8 is protruded to the height capable of shielding the light beam emitted from the rotational parabolic reflecting mirror face 2 of the reflector 1 through the curve section 5b of a bulb 5. The leg section of the shielding rib 8 is inclined to the inside of the shielding line S1 connecting the tip 8a and the position of the focal point F of the reflector 1. When the bulb 5 is lighted, the light beam emitted from the curve section 5b formed at the rear end of the glass tube 5a of the bulb 5 is shielded by the shielding rib 8. A shielding area S2 against the rotational parabolic reflecting mirror face 2 of the reflector 1 is formed, and the occurrence of uncontrollable glare light is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a reflector of a vehicular lamp, and more particularly to a vehicle in which a light-shielding rib is formed on the inner surface of the reflector to prevent the emission of non-control light of a bulb which causes glare. It relates to lighting equipment.

[0002]

2. Description of the Related Art Conventionally, a fog lamp or other auxiliary headlight has a housing 5 as shown in FIG.
A reflector 52 in which a paraboloidal reflecting mirror surface 51 is formed in 0.
And a valve 55 formed integrally with the socket 54 is detachably fitted from the rear of the valve insertion hole 53 formed in the rear of the reflector 52, and the rear of the socket 54 is set by the set spring 56. The valve insertion hole 53 is configured to be pressed and locked to the opening edge portion. Further, the bulb 55, which serves as the light source, has its filament 5
7 is a structure that is supported at a substantially focal point F position of the reflector 52 and obtains a predetermined light distribution, and a so-called C6 bulb structure is used. This valve 5
Due to its structure, a curved portion 55b facing the paraboloidal reflector surface of the reflector 52 is formed at the rear end of the glass ball 55a of No. 5 in terms of its structure. Reference numeral 58 denotes a front lens that covers the front opening of the housing 50.

[0003]

Therefore, in the vehicular lamp having the above structure, when the bulb 55 is turned on, the emitted light that passes through the curved portion 55b formed at the rear end of the glass ball 55a is bent. Since the diffused light is generated in the combined portion 55b to generate glare light, the rotating parabolic reflector surface 51 of the reflector 52 has a problem that the reference light distribution necessary for a vehicle lamp cannot be obtained in the portion. there were.

The present invention was devised in view of the above problems, and cuts light emitted from a bent portion formed at the rear end of a glass bulb of a bulb to prevent generation of glare light. An object of the present invention is to provide a vehicular lamp that can obtain a preferable light distribution as a vehicular lamp.

[0005]

In order to achieve the above-mentioned object, a vehicular lamp according to the present invention has a valve insertion hole formed in the rear portion of a reflector having a paraboloid of revolution reflecting mirror, and the valve insertion hole is formed in the opening. In a vehicular lamp in which a bulb for a light source is detachably mounted at a substantially focal position of the reflector via a light-shielding rib formed integrally with the reflector at a peripheral portion of a bulb insertion hole on an inner surface of the reflector. The tip of the light-shielding rib is formed so as to project to a light-shielding position for outgoing light that passes through the curved portion formed at the rear end of the glass bulb of the bulb, and the leg portion of the light-shielding rib is formed between the tip and the reflector. The gist is that it is formed so as to be inclined inwardly of the 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 bulb of the bulb is blocked by the light-shielding rib formed on the peripheral portion of the inner bulb insertion hole of the reflector. The generation of glare light emitted from the curved portion is prevented. Further, since the leg portion of the light shielding rib is inclined to the inner side of the light shielding line, the reflection performance of the outer surface of the leg portion is improved, and the generation of the dark portion on the inner surface of the reflector is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicular lamp according to the present invention will be described below with reference to the drawings. 1 and 2 are cross-sectional views of a main part of a reflector included in a vehicular lamp according to the present invention. Reference numeral 1 is a reflector having a parabolic reflector surface 2 formed on its inner surface. In this reflector 1, a valve insertion hole 3 is opened in the rear part of the reflector 1 located at the bottom of the paraboloidal reflector 2, and a valve 5 integrally formed with a socket 4 is fitted and mounted from the rear part of the reflector 1. The valve support edge 6 formed at the rear edge of the insertion hole 3 is detachably pressed and fixed by a linear or plate-shaped set spring 7.

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 portion of the glass bulb 5a has a cylindrical light emitting portion in a side view. The bent portion 5b is formed so that the irradiation effective light emitted from the filament 5c is emitted from the light emitting portion. The bulb 5 is mounted so that its filament 5c is supported at the substantially focal point F of the parabolic reflector 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 constructed as described above. The light-blocking rib 8 is for blocking the emitted light that passes through the curved portion 5b formed at the rear end of the glass bulb 5a of the bulb 5, and the tip 8a thereof is the paraboloidal reflector of the reflector 1. 2 is formed so as to project to a height capable of shielding the light flux emitted from the curved portion 5b of the bulb 5 and the leg portion of the light shielding rib 8 has its tip 8a and the reflector 1.
It is formed so as to incline to the inside of the light-shielding line S1 that connects the focal point F position, and its outer surface 8b forms an internal reflection surface. The internal reflection surface formed by the outer surface 8b of the light-shielding rib 8 causes the parabolic reflector surface 2 of the reflector 1 to rotate.
It is possible to prevent the expansion of the dark part that occurs at the bottom of the. 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 made large, so that the plate-shaped set spring 7 can be made long 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 performed. A shading area S2 for the mirror surface 2 is formed to prevent generation of uncontrollable glare light. Also,
The outer surface 8b of the light-shielding rib 8 exerts a mutual reflection action with the paraboloid of revolution parabolic reflector 2 of the reflector 1 when the bulb 5 is turned on, so that a dark portion due to this portion is prevented.

3 and 4 show a first embodiment relating to the structure of the inner surface of the reflector. A rotating parabolic reflector surface 2 formed on the inner surface of the reflector 1 according to this embodiment.
Is a so-called corrugated diffuse reflection step 2a, in which convex and concave curved surfaces extending in the horizontal direction along the paraboloid of revolution are repeated at an equal pitch in the vertical direction,
Each of the convex diffuse reflection steps 2a, 2a ... Has a diffusivity 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 attachment of the front lens by the paraboloid of revolution parabolic reflector 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. When the reflector 1 is irradiated with diffused light in the range of ˜3 °, and the front lens is attached to the reflector 1, as shown in FIG. 6, the normal light distribution pattern P1 (1 ° -5 °) is 1.5-2. It is possible to obtain a light distribution pattern P2 (6 ° to 9 °) that is diffused by a factor of 0.5. As a result, it becomes possible to reduce the maximum luminous intensity and obtain an appropriate luminous intensity as a vehicular lamp. 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, like a recent fog lamp, the yellow globe of the conventional configuration (the standard luminous intensity as a vehicle lamp is specified with the yellow globe attached) is abolished and white light is irradiated (cleared). In this case, it is possible to prevent the occurrence of a state in which the maximum luminous intensity significantly exceeds the conventional standard luminous intensity, and improve the conformity to the standard. Moreover, since the irradiation area on the road surface is expanded to the front side of the vehicle by such a configuration, it is possible to significantly improve the visibility 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, and only the portions different from the first embodiment will be described. A rotating parabolic reflector surface 2 formed on the inner surface of the reflector 1 according to this embodiment.
Is formed by arranging a large number of diffuse reflection steps 2a, 2a ... Which are curved in a convex shape along the surface of the paraboloid of revolution, and each diffuse reflection step 2a, 2a.
Are formed so as to have a diffusivity of approximately 1 ° to 3 ° in the vertical direction (see A in FIG. 8) and approximately 10 ° to 40 ° in the horizontal direction (see B in FIG. 9). Therefore, according to the rotary parabolic reflector surface 2 of the reflector 1 having the above-described configuration, the vertical direction is 1 ° to 3 ° and the horizontal direction is 10 ° to 40 ° as shown in FIG. 10.
It is possible to obtain the light distribution pattern P2 diffused in the above, and it is possible to reduce the maximum luminous intensity as in the case of the reflector 1 according to the first embodiment, and obtain an appropriate luminous intensity as a vehicle lamp.

FIG. 11 is a schematic explanatory view showing an embodiment of a method of constructing a front lens to be mounted on a vehicular lamp according to the present invention. The front lens 9 to be mounted on the vehicular lamp according to the present embodiment has a housing (not shown) that houses the reflector 1 having a rotation parabolic reflector surface 2 formed on the inner surface and emitting a parallel light flux to the front surface of the lamp. Has a structure for diffusing the light emitted from the bulb 5 in a predetermined range by covering the front opening of the diffusing lens step 9a, which is a so-called fish-eye lens divided into a lattice shape in the vertical and horizontal directions on its inner surface. , 9a ... Are formed.

Each of the diffusion lens steps 9a, 9a ...
Is approximately 10 ° to 40 ° in the left-right direction in this embodiment,
Further, it is formed so as to have a light diffusivity of approximately 1 ° to 3 ° in the vertical direction, and compared with the conventional light distribution pattern by the front lens configured to have a diffusing function in the horizontal direction only, the horizontal direction. About 10 ° to 40 ° and about 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 configuration, the luminous flux emitted from the bulb 5 is diffused, the maximum luminous intensity is controlled to be reduced, and the conformity to the light distribution performance standard on the road surface can be improved, and at the same time, the road surface can be improved. To improve visibility. Needless to say, the front lens 9 according to this embodiment can be modified as a front lens of a lamp in which the lamp body is integrally formed with the reflector.

[0016]

Since the vehicular lamp according to the present invention is configured as described above, it has a structure in which the light shielding rib is erected on the peripheral portion of the inner surface bulb insertion hole of the reflector, and the light shielding rib makes the glass bulb of the bulb. 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 leg portions of the light shielding rib are inclined inside the light shielding line. Therefore, the reflection performance on the outer surface of the leg portion is improved, and the generation of the dark portion on the inner surface of the reflector can be prevented.

Further, 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 irradiation luminous intensity, and the light distribution performance standard on the road surface of the vehicular lamp is met. It is useful as a structure of an auxiliary headlight such as a fog lamp in recent years in which a colored globe is eliminated to make it clear, and the effect obtained by implementing the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is a vertical 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 relevant part.

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

FIG. 4 is a vertical 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 regarding the structure of the reflector.

FIG. 8 is a vertical 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 vertical cross-sectional view showing a conventional vehicle lamp.

[Explanation of symbols]

 1 Reflector 2 Rotating Parabolic Reflector Surface 5 Bulb 5a Glass Sphere 5b Curved Part 5c Filament 7 Set Spring 8 Light-shielding Rib 8a Tip 8b Outer Surface 9 Front Lens

Claims (1)

[Claims] 1. A bulb insertion hole is formed in a rear portion of a reflector having a paraboloidal reflector, and a bulb for a light source is detachably attached to a substantially focal position of the reflector through the bulb insertion hole. In a vehicular lamp, a light-shielding rib that is integral with the reflector is formed on a peripheral portion of a bulb insertion hole on an inner surface of the reflector, and a tip of the light-shielding rib is formed with a curved portion formed at a rear end of a glass ball of the bulb. For a vehicle characterized in that it is formed so as to project at a light-shielding position for transmitted outgoing light, and that the leg portion of the light-shielding rib is formed so as to incline to the inside of a light-shielding line connecting the tip and the focal position of the reflector. Light fixture.