JP2000299005A - Vehicle lighting fixtures - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve visibility of headlights of two-wheeled vehicles and four-wheeled vehicles in vehicle lighting. A vehicular lamp (1) includes a reflector (2) having an inner surface serving as a reflection surface, into which a bulb (3) is inserted, a lens (8) disposed in front of the reflector (2), and a lens (8) for transmitting light from the reflector (2). And a light guide tube 9 for guiding the
One of the reflection surfaces of the reflectors 2 opposed to each other with the bulb 3 interposed therebetween is formed as a spherical reflection surface 5 having the bulb 3 as a center, and the other reflection surface is formed with the bulb 3 as a first focus and the spherical reflection surface. A spheroidal reflecting surface 6 having an arbitrary point 5 as a converging point B is characterized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a vehicle, and more particularly to an improvement in visibility of headlights of two-wheeled vehicles and four-wheeled vehicles.

[0002]

2. Description of the Related Art The headlights of two-wheeled vehicles and four-wheeled vehicles illuminate the front of the vehicle during night driving to visually recognize the left and right sides of the road and the presence or absence of obstacles in the traveling direction.
A high illuminance is required, and since it is mounted at the head of the vehicle, its appearance determines the design of the vehicle. Therefore, it is necessary to satisfy design requirements.

FIG. 9 is a sectional view of a conventional automotive lamp, and FIG. 10 is a perspective view thereof. The reflector 91
The bulb 3 is provided near the focal point of the main reflection surface, and the lens 94 is mounted on the housing 95 at the front opening of the bulb 95. The main reflection surface 92, the reflector upper surface 93a, and the reflector lower surface 93b are provided.

Light is emitted from the light source center A of the bulb 3 in all directions, but in order to reflect the light forward, it is necessary that the reflector 91 surrounding the light source be entirely a rotating paraboloid. Those formed into a shape are most desirable. However, in the case of an actual automobile or two-wheeled vehicle, the shape of the opening of the reflecting surface is horizontally long and rectangular, as shown in FIG.

As shown in FIG. 9, in a vehicular lamp 90, emitted light r5 emitted from the bulb 3 as a light source is reflected forward by a main reflection surface 92 formed substantially in a paraboloid. However, the reflector upper surface 93 is flat.
The light in the vertical direction indicated by the arrow L directed to a and the reflector lower surface 93b is not reflected forward and is invalid light.

As a method of collecting these invalid light L traveling in the vertical direction and guiding it toward the lens, a structure using a light guide tube shown in FIG. 8 is known. Reflector 2 as shown
The upper surface of the reflector 2 is a spheroidal reflecting surface 6a having a focal point at the light source center A and the focal point B1, and the lower surface of the reflector 2 is a spheroidal reflecting surface 6b having the focal point at the light source center A and the focal point B2. The emitted light r1 is reflected by the spheroidal reflecting surface 6a and collected at the converging point B1, and the downward emitted light r2 is reflected by the spheroidal reflecting surface 6b and collected at the converging point B2. It leads to the lens direction.

However, in the above technique, the light guide tube 9 must be arranged on the upper surface and the lower surface, so that the cost is high, and since the respective lights are weak, even if the light is guided to the lens surface, the visibility is not significantly improved. was there.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a reflector for an automobile lighting device having a rectangular appearance, which can collect ineffective light that is not emitted forward and guide it to a lens. Is what you do. This allows light to be emitted from any part of the lens.

As a result, a higher illumination effect than before can be obtained, and characters and designs can be displayed with colored light, so that the design of the headlight which affects the image of the vehicle can be made widely and freely. The task is to do so.

The outer shape of the reflector is square,
An object of the present invention is to increase the mounting rate at the front part of the vehicle by reducing the mounting capacity.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a reflector having an inner surface as a reflecting surface, into which a bulb is inserted, and a lens disposed in front of the reflector. A light guide tube for guiding the light from the reflector to the lens, and forming one reflection surface of the reflector facing the other side of the bulb as a spherical reflection surface having the bulb substantially at the center, and forming the other reflection surface. The bulb may be a spheroidal reflecting surface having a first focal point and an arbitrary point on the spherical reflecting surface as a converging point.

[0012] The reflector provides a reflector that can collect ineffective light that is not emitted forward and guide it to the lens, and obtains a higher illumination effect than before.
Further, characters and designs can be displayed with the colored light, and the design of the headlight which affects the image of the vehicle can be made widely and freely.

According to a second aspect of the invention, there is provided a vehicular lamp, wherein the spherical reflecting surface and / or the spheroidal reflecting surface are divided into a plurality of parts. By this division, the height above the reflector can be reduced, and the dimension below the reflector can be shortened, so that the mounting ratio of the lamp to the vehicle can be increased.

According to a third aspect of the present invention, there is provided a vehicle lamp including a reflector having an inner surface serving as a reflection surface and a bulb inserted therein.
A lens disposed in front of the reflector, an extension disposed between the lens and the reflector and partially provided with a light-shielding film, and a light guide tube for guiding light from the reflector to the extension. Forming one of the reflecting surfaces of the reflectors opposed to each other with the bulb therebetween as a spherical reflecting surface having the bulb as a center, and setting the other reflecting surface to the bulb as a first focus, and any point on the spherical reflecting surface. Is a spheroidal reflecting surface having a focusing point.

According to the third aspect of the present invention, there is provided a reflector which can collect ineffective light which is not emitted to the front and guide it to a lens, obtain a higher illumination effect than ever before, and further provide an extension in the reflector. Characters and designs can be displayed with colored light, and the design of headlights that affect the image of the vehicle can be made widely and freely.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below in detail with reference to FIG. 1 and FIGS. A vehicle lamp 1 shown in FIG. 1 has a reflector 2 in which an inner surface is a reflection surface and into which a bulb 3 is inserted.
And a light guide tube 9 that guides light from the reflector 2 to the lens 8 disposed in front of the reflector 2. And a spheroidal reflecting surface 6 having the other reflecting surface as a first focus on the bulb 3 and an arbitrary point on the spherical reflecting surface 5 as a condensing point B. It is characterized by having.

Behind the reflector 2 facing the lens 8 is a rotating parabolic mirror 4 for reflecting light traveling backward from the bulb 3 as a light beam substantially parallel to the front lens 8 direction.
Is provided. Therefore, high illuminance can be obtained.

The spheroidal reflecting surface 6 is formed by forming an elliptical line Y into a spheroidal shape obtained by rotating the elliptic line Y about the optical axis center C1 and providing a reflective film on the inner surface. Is focused on the focal point B as the reflected light 1. This makes it possible to collect the radiated light toward the upper surface of the reflector 2, which has been invalid light in the past, at the focal point B.

The spherical reflecting surface 5 is formed by moving the circle Z to the optical axis center C1.
The light emitted from the light source center A of the bulb 3 is reflected to the light source center A as reflected light 2 by reflecting light r2 from the center A of the light source. This reflected light
2 is directed to the spheroidal reflecting surface 6 provided on the upper surface in the same manner as the upward emitted light r1, and is focused on the focal point B as in the reflected light 1. As a result, the radiated light directed toward the lower surface of the reflector 2, which has been invalid light in the past, can also be collected at the focal point B.

The light beam collected at the light condensing point B passes through the inside of the light guide tube 9 and is guided to the lens 8. The lens 8 is fitted and attached to the housing 7, and can be colored into a luminous flux by providing a colored filter 10 at a joint with the light guide tube 9. FIG. 5 is an enlarged view of the main part.

FIG. 3A is a front view of the vehicular lamp 1. In this embodiment, the light guided by the light guide tube 9 and transmitted through and diffused inside the lens 8 is directed toward the surface of the peripheral portion of the lens 8. Is provided with a diffusing portion 8a for irradiating with total reflection, thereby enhancing visibility. FIG. 3B shows a cross-sectional view thereof. A lens 8 has a concave-convex diffused portion 8a on its back surface that totally reflects internally transmitted light.
Are formed.

FIG. 4 shows a case where the diffusing portion 8a is provided at a position away from the main light distribution portion centering on the bulb 3, and light is emitted from the diffusing portion 8a in the form of characters or patterns. In addition, the lens 8 can be designed to emit light not only on the peripheral surface but also on any surface.

Also, as shown in FIG. 5, by providing a colored filter 10 of an arbitrary color between the lens 8 and the light guide tube 9, a light emission color different from the illumination light can be obtained.

(Second Embodiment) A second embodiment will be described with reference to FIG. The same structures as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. A vehicle lighting device 1a shown in FIG. 2 has a reflector 2 having an inner surface serving as a reflection surface, into which a bulb 3 is inserted, a lens 8 disposed in front of the reflector 2, and a reflector 2
And a light guide tube 9 for guiding light from the light source to a lens 8. One of the reflection surfaces of the reflectors 2 opposed to each other with the bulb 3 interposed therebetween is formed into a divided spherical reflection surface 5 having the bulb 3 as a center. In addition, the other reflecting surface is characterized by a divided spheroidal reflecting surface 6 having the bulb 3 as a first focal point and an arbitrary point on the spherical reflecting surface 5 as a condensing point B.

In this embodiment, the reflector 2
Of the upper surface 2a is flattened, the inner spheroidal reflecting surface 6 is divided and divided into a plurality of partial mirrors 6a, 6b, 6c, and the light from the light source center A is reflected to the converging point B. With this arrangement, the height above the reflector can be reduced, and the mounting rate of the vehicle can be increased.

Further, the outer shape of the lower surface 2b of the reflector 2 is formed flat, the inner spherical reflecting surface 5 is divided and divided into a plurality of partial mirrors 5a, 5b, 5c, and the light traveling from the light source center A to the lower surface. Is reflected on the upper surface to focus on the vicinity of the light source, so that the size below the reflector can be shortened, and the mounting rate of the vehicle can be increased.

The partial mirrors 6a to 6c obtained by dividing the spheroidal reflecting surface 6 make it possible to collect the radiated light toward the upper surface of the reflector 2 which has become invalid light at the converging point B.

The partial mirror 5 obtained by dividing the spherical reflecting surface 5
a to 5c reflect the emitted light r2 from the light source center A of the bulb 3 to the light source center A. The reflected light 2 is provided by the partial mirrors 6a to 6c provided on the upper surface similarly to the upward emitted light r1.
And the light is collected with the focal point B as the focal point. As a result, the radiated light directed toward the lower surface of the reflector 2, which has been invalid light in the past, can also be collected at the focal point B.

For this reason, the luminous flux collected at the focal point B is
As in the first embodiment, light can be emitted in any form by the lens 8 on the front surface, and the same effect as in the first embodiment can be obtained.

(Third Embodiment) A third embodiment will be described with reference to FIGS. The same structures as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. A vehicle lamp 1b shown in FIG. 6 includes a reflector 2 having an inner surface serving as a reflection surface and a bulb 3 inserted therein,
A lens 8 disposed in front of the reflector 2, and an extension 11 disposed between the lens 8 and the reflector 2 and partially provided with a light shielding film 12.
And light from the reflector 2 to the extension 1
1 and a light guide tube 9 for guiding the light from the light source to one of the reflectors 2 facing each other with the bulb 3 interposed therebetween. A spheroidal reflecting surface 6 having a bulb 3 as a first focal point and an arbitrary point on the spherical reflecting surface 5 as a converging point B is characterized.

Behind the reflector 2 facing the lens 8 is provided a parabolic mirror 4 for reflecting light traveling rearward from the bulb 3 as a light beam substantially parallel to the front lens 8 direction. Therefore, high illuminance can be obtained.

FIG. 6A is an enlarged view of a main part of the extension 11 provided as an auxiliary reflector inside the lens 8. The extension 11 is made of a transparent member, and is formed by forming a light shielding film 12 on the outside by vapor deposition or plating so as to enhance the internal light transmission.
2, a desired diffused portion 11a is provided on the back side of the desired character or design, and the back surface thereof is provided with an uneven diffusion portion 11a for totally reflecting the internally transmitted light to the front side. For this reason, the extension 11 can emit the emitted light 13 in an arbitrary shape.

FIG. 6B shows an embodiment in which the extension 11 is provided inside the lens 8 and the light from the light guide tube 9 is guided through the colored filter 10 to the inside.

In this embodiment, as shown in FIG.
By providing the extension 11, it is possible to obtain an appearance design in which characters and designs that emit light are projected on the inner surface of the lens 8, and it is possible to obtain the same effects as in the first embodiment. .

[0035]

As described above in detail, according to the present invention, all the radiation emitted in the vertical direction of the reflector, which has been invalid light that has not been emitted forward, is collected into one point as a light beam of high illuminance that can be used. To take it out.

With this light beam, illumination light can be emitted in any form at the designed portion of the lens or extension. Thereby, the visibility of the vehicular lamp can be improved.

According to the second aspect of the present invention, the mounting efficiency of the front part of the vehicle can be increased by reducing the mounting capacity of the reflector.

Further, in the vehicle lamp provided with the extension according to the third aspect, it is possible to provide an appearance design in which characters and designs that emit light emerge on the inner surface of the lens 8.

With these, a higher illumination effect than before can be obtained, and furthermore, characters and patterns can be displayed with colored light, so that the design of the headlight which affects the image of the vehicle can be made widely and freely.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view of a second embodiment of the present invention.

3A is a front view of a lens according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view thereof.

FIG. 4 is a front view of another lens according to the embodiment of the present invention.

FIG. 5 is an enlarged view of a main part showing a color filter of the lens of the present invention.

FIG. 6A is an enlarged view of an extension according to a third embodiment of the present invention, and FIG. 6B is a cross-sectional view of the third embodiment.

FIG. 7 is a perspective view of a third embodiment of the present invention.

FIG. 8 is a sectional view showing a conventional technique.

FIG. 9 is a sectional view showing another conventional technique.

FIG. 10 is a perspective view of another prior art.

[Explanation of symbols]

 A Light source center B, B1, B2 Focus point X Parabola Y Elliptical line Z Circle L Light r1 to r5 Emitted light 1 Vehicle lighting fixture 2 Reflector 3 Bulb 4 Rotating parabolic mirror 5 Spherical reflecting surface 6, 6a, 6b Rotation Elliptical reflection surface 7 Housing 8 Lens 8a Lens diffusion unit 9 Light guide tube 10 Colored filter 11 Extension 12 Light shielding film 13 Radiation light 90 Vehicle lamp 91 Reflector 92 Main reflection surface 93a Reflector upper surface 93b Reflector lower surface 94 Lens 94a Lens cut 95 housing

Claims (3)

[Claims] A reflector having an inner surface serving as a reflecting surface into which a bulb is inserted, a lens disposed in front of the reflector, and a light guide tube for guiding light from the reflector to the lens. One of the reflection surfaces of the reflectors opposed to each other with the bulb interposed therebetween is formed as a spherical reflection surface having the bulb substantially at the center, and the other reflection surface is focused on the bulb as the first focal point and collects arbitrary points on the spherical reflection surface. A lighting device for a vehicle, comprising a spheroidal reflecting surface serving as a light spot. 2. The vehicle lighting device according to claim 1, wherein the spherical reflecting surface and / or the spheroidal reflecting surface are divided into a plurality of parts. 3. A reflector having an inner surface serving as a reflection surface into which a bulb is inserted, a lens disposed in front of the reflector, and disposed between the lens and the reflector and partially shielded from light. An extension provided with a film and a light guide tube for guiding light from the reflector to the extension, and one reflecting surface of the reflector opposed to the bulb is formed as a spherical reflecting surface substantially centered on the bulb. A lighting device for a vehicle, wherein the other reflecting surface is a spheroidal reflecting surface having the bulb as a first focus and an arbitrary point on the spherical reflecting surface as a condensing point.