JPH0449763Y2 - - Google Patents

Description

[Detailed Description of the Invention] The automobile headlamp of the present invention will be explained according to the following items.

A. Industrial application field B. Overview of the invention C. Prior art [Figure 7] D. Problem that the invention attempts to solve [Figures 7 and 8]
[Figure] E Means for solving the problem F Example [Figures 1 to 6] a Projection unit b Light bulb c Projection lens d Lamp body, lens e Light guide f Function g Modifications, etc. G Effects of the invention ( A. Field of Industrial Application) The present invention relates to a novel automobile headlamp. Specifically, it includes a light source, a reflecting mirror that reflects the light from the light source and focuses it on a focusing section in front, and a projection lens that is disposed in front of the reflecting mirror and whose focal point is located near the focusing section. A headlamp for an automobile in which a projection part is disposed in a lamp body larger than the projection part, and when the lamp body is turned on, most of the part corresponding to the difference in shape between the lamp body and the projection part also shines. It is an object of the present invention to provide a novel automobile headlamp that does not give the driver of the preceding vehicle, pedestrians, etc. any illusions regarding the following vehicle, etc.

(B Overview of the invention) The automobile headlamp of the present invention has a transparent plate-shaped light guide arranged in the lamp body to fill the difference in shape between the front opening of the lamp body and the projection part. , a light guide light source is disposed facing an end face of the light guide, and the light from the light guide light source entering the rear face of the light guide from the end face opposite to the light guide light source is directed forward. A reflecting means is provided, so that when the light source for the light guide is turned on at dusk or at night, the light enters the light guide from the end surface of the light guide and is reflected by the reflecting means on the rear surface. The light is reflected and emitted forward, and the light guide shines brightly, allowing the driver of the preceding vehicle or pedestrians to notice that the following vehicle or passing vehicle is a passenger vehicle with headlights on both sides. It is possible to recognize that the vehicle is as follows.

(C Prior Art) [Figure 7] A light source, a reflector that reflects the light from the light source and focuses it on a condensing section in front, and a reflector that is placed in front of the reflector and whose focal point is near the condensing section. There is a headlamp with a positioned projection lens.

Since such a headlamp has a light distribution pattern with a very sharp outline, it is suitable for satisfying strict light distribution standards and is excellent as a headlamp for automobiles.

However, since the light emitting surface of such headlights is very small, there is a problem that the appearance of these headlights is undesirable at a time when large headlights and elongated headlights tend to be preferred in terms of design. be.

Therefore, as shown in FIG. 7, a light source, a reflector that reflects the light from the light source and focuses it on a condensing part in front, and a reflector that is placed in front of the reflector and whose focal point is near the condensing part. The part a with the positioned projection lens is arranged as a projection part in a lamp body b with a larger outline, in particular a larger outline of the front opening, and the front opening of the lamp body b is covered with a lens c. An automobile headlamp f is considered in which a dummy plate d whose front surface is a reflective surface is arranged inside a lamp body b, and the front end of a projection part a is inserted into an insertion hole e formed in the dummy plate d. There is.

According to such an automobile headlamp f, during the daytime, outside light entering the lamp body b through the lens c is reflected by the front surface of the dummy plate d and returned to the outside, so that light from the front is reflected. When viewed, it is difficult to distinguish between the projection part a and other parts, giving the impression that it is a large headlamp.

(D. Problem that the idea aims to solve) [Figure 7,
[Fig. 8] By the way, in the case of the above-mentioned automobile headlight f, the dummy plate d does not shine at night, and only the projection part a appears to shine, so that the driver of the preceding vehicle or pedestrians etc. If you look at it, it will create an illusion as if two motorcycles are traveling side by side, and when you make a traffic decision, there is a risk that you will make the wrong decision based on erroneous information. , which is extremely problematic in terms of traffic safety.

(E. Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the automotive headlight of the present invention bridges the shape difference between the front end of the projection part and the front opening of the lamp body. A light guide is placed inside the lamp body, and the end face of the light guide faces the light source for the light guide, and the light from the light source for the light guide enters the light guide from the end face onto the rear face of the light guide. It is equipped with a reflecting means that reflects the light forward.

Therefore, in the automobile headlamp of the present invention, when the light source for the light guide is turned on at dusk or at night, the light enters the light guide from the surface facing the light source, and the light guide Since the light is reflected forward by the reflecting means provided on the rear surface of the body, the light guide appears to shine, and as a result, a front light of a size corresponding to the area of the light guide seen from the front is emitted. It is visually recognized as a light, thereby preventing the driver of the preceding vehicle, pedestrians, etc. from creating an illusion regarding the following vehicle.

In addition, by appropriately selecting the bright color tone of the light guide, the design effect can be enhanced, and furthermore, by making the brightness of the light source for the light guide variable,
Various design effects can also be created.

(Embodiment F) [Figs. 1 to 6] The details of the automobile headlamp of the present invention will be explained below according to Embodiment 1 illustrated in the drawings.

(a Projection Section) 2 is a projection section, which is composed of a reflecting mirror, a light bulb, and a projection lens.

The reflecting mirror 3 has a reflecting surface 4 that focuses the reflected light onto a focusing section in front of it, and for example, a parabolic-elliptical compound surface can be used. Here, the parabola-ellipse compound surface forms a parabola in the horizontal cross section, an ellipse in the vertical cross section, and the focal point of the parabola and the first focal point of the ellipse are the same point F (hereinafter referred to as "focal point"). ), and
This is a plane on which the axes x-x (hereinafter referred to as "optical axes") coincide. Therefore, when a light source is placed at the focal point F, the light 5, 5, . The light is focused at the second focal point. Therefore, the reflected light beams 5, 5, . .
Therefore, when these reflected lights 5, 5, . . . are cut at a plane perpendicular to the optical axis x-x just before or after the condensing part F', a bundle of light from the reflected lights 5, 5, . presents a substantially rectangular pattern 6 that is long in the horizontal direction.

Incidentally, the reflecting surface of the reflecting mirror is not limited to a parabolic-elliptical compound surface, but may be any surface as long as it has the property of condensing the reflected light onto the front condensing section. Specifically, it varies depending on the desired light distribution pattern. For example, various objects such as a spheroid or a surface obtained by deforming an ellipse can be used.

(b Light bulb) 7 is a light bulb attached to the reflecting mirror 3, and a filament 9 is enclosed in the glass bulb 8, and the filament 9 is placed at the focal point F of the reflecting surface 4. There is.

Reference numeral 10 denotes a light-shielding film applied to the front end of the glass bulb 8, and the light-shielding film 10 prevents direct light from the filament 9 from being irradiated forward.

(c Projection Lens) A projection lens 11 is disposed in front of the condensing portion F' of the reflecting mirror 3, and has a convex lens shape with a substantially flat rear surface and a convex curved front surface. The focal point F _C of the projection lens 11 is located slightly behind the condensing portion F' of the reflecting surface 4. The projection lens 11 projects the pattern 6 forward as an inverted image.

Note that 12 is a cylindrical body, which is attached to the front end of the reflecting mirror 3 so as to fit externally, and this cylindrical body 12
A projection lens 11 is supported at the front end of the lens.

(d Lamp Body, Lens) Reference numeral 13 denotes a lamp body, which has a horizontally long rectangular shape when viewed from the front, and has a concave portion 14 that opens toward the front.

The projection section 2 is supported at the center of the lamp body 13.

A lens 15 is attached to the lamp body 13 so as to cover the front opening 16 thereof.

(e Light guide) 17 is a light guide made of a transparent material, for example, a transparent synthetic resin, has a plate shape, and substantially covers the front opening 16 of the lamp body 13 when viewed from the front. It's the size.

Reference numeral 18 denotes an insertion hole formed approximately at the center of the light guide 17, and the front end of the projection section 2 is located within the insertion hole 18.

Further, a large number of conical recesses 19, 19, . . . are formed on the rear surface of the light guide 17.

Reference numeral 20 denotes a flat box-shaped case with an opening at the front, and the light guide 17 is housed within the case 20. Note that 21 is an insertion hole formed in the case 20 at a position corresponding to the insertion hole 18 of the light guide 17.

Reference numeral 22 denotes a diffuser plate disposed to cover the front opening of the case 20, and is used to make the brightness of the light guide 17 appear softer. This diffuser plate 22
Also, an insertion hole 22a is formed at a position corresponding to the insertion hole 18 of the light guide 17.

23, 23 are light guide light bulbs, and case 20
The light guide 1 is stored in the left and right ends of the inner
It faces both left and right end surfaces 24, 24 of 7.

(F Effect) However, in the case of the above automobile headlamp 1,
When the light guide bulbs 23, 23 are lit, the light 2
5, 25, ... are both left and right end surfaces 24 of the light guide 17,
The light enters the light guide 17 from 24 and spreads throughout the light guide 17 due to the edge light effect. and,
Among these lights 25, 25, ..., concave point 1 on the rear surface
Since the light reflected on the inner surfaces of the lenses 9, 19, .

(g Modifications, etc.) 26 is a filter plate disposed between the diffuser plate 22 and the lens 15 in the lamp body 13;
It is colored in the desired color. For example, when using this automobile headlamp 1 as a fog lamp, it may be colored yellow, or the projection part 2 may be colored yellow.
The portion facing the surface may be made colorless and transparent, and the remaining portion may be colored in a desired color. Further, depending on the case, a metallic color may be used.

By doing this, for example, when the light guide bulbs 23, 23 are turned on at dusk, the lens 1
The entire inside of 5 glows faintly, enhancing the design atmosphere.

Furthermore, separately from the filter plate 26, or in addition to providing the filter plate 26,
A half mirror surface may be formed on the lens 15.

(G. Effect of the device) As is clear from the above description, the vehicle headlamp of the present invention consists of a light source, a reflector that reflects the light from the light source and focuses it on a condensing section in front, and a projection section including a projection lens disposed in front of a mirror and whose focal point is located near the condensing section; a lamp body having an opening in the front and in which the projection section is disposed; and the lamp body. It consists of a lens that covers the front opening of the lamp body, a light guide placed inside the lamp body, and a light source for the light guide facing the end face of the light guide. It is formed in a shape that substantially covers the front opening of the body, and has an insertion hole formed therein for exposing the front end of the projection section to the front, and a light guide that enters from the surface facing the light source for the front light guide on the rear surface. It is characterized by having a reflecting means that reflects the light from the light source for the light body forward.

Therefore, in the automobile headlamp of the present invention, when the light source for the light guide is turned on at dusk or at night, the light enters the light guide from the surface facing the light source, and the light guide Since the light is reflected forward by the reflecting means provided on the rear surface of the body, the light guide appears to shine, and as a result, a front light of a size corresponding to the area of the light guide seen from the front is emitted. This can be visually recognized as a light, thereby preventing the driver of the preceding vehicle, pedestrians, etc. from creating an illusion regarding the following vehicle.

In addition, by appropriately selecting the bright color tone of the light guide, the design effect can be enhanced, and furthermore, by making the brightness of the light source for the light guide variable,
Various design effects can also be created.

In the above-mentioned embodiment, a conical recess is shown as the reflecting means provided on the rear surface of the light guide, but this does not mean that the reflecting means in the present invention is limited to such a recess. do not have. For example, a groove may be formed, or a reflective film may be provided on the rear surface.

The other configurations shown in the above embodiments are merely illustrative of specific application examples of the present invention, and the technical scope of the present invention should not be construed as limited by these.

[Brief explanation of the drawing]

Figures 4 to 6 show the first embodiment of the automobile headlamp of the present invention, with Figure 1 being a front view and Figure 2 being a front view.
The figure is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, Fig. 4 is an enlarged schematic perspective view of the projection section, and Fig. 5 is a main part showing the operation. An enlarged sectional view, Fig. 6 is a horizontal sectional view showing a modified example, and Fig. 7 is a horizontal sectional view showing a modified example.
FIG. 8 is a longitudinal sectional view showing an example of a conventional automobile headlamp, and FIG. 8 is a front view showing problems with the conventional automobile headlamp shown in FIG. 7. Explanation of symbols, 1...Car headlamp, 2...Projection unit, 3...Reflector, 5...Light, 9...Light source, 1
1... Projection lens, 13... Lamp body, 15
... Lens, 16 ... Front opening, 17 ... Light guide, 18 ... Insertion hole, 19 ... Reflection means, 22 ...
...Diffusion plate, 23...Light source for light guide, 24...End face of light guide, 26...Filter plate, F'...Condenser, F _C ...Focal point (of projection lens).

Claims (1)

[Claims for Utility Model Registration] (1) A light source, a reflector that reflects the light from the light source and focuses it on a condensing section in front, and a reflector that is disposed in front of the reflector and whose focal point is near the condensing section. a projection unit having a projection lens located in the lamp body; a lamp body having a front opening and having the projection unit disposed therein; a lens covering the front opening of the lamp body; It consists of a disposed light guide and a light source for the light guide facing the end face of the light guide, and the light guide is a transparent plate shaped body formed in a shape that substantially covers the front opening of the lamp body. An insertion hole is formed to allow the front end of the projection section to face forward, and the light from the light source for the light guide that enters from the surface facing the light source for the light guide is reflected forward on the rear surface. (2) A vehicle according to claim 1, characterized in that a filter plate is disposed between the lens and the light guide. Vehicle headlight (3) A vehicle headlight as set forth in claim 1 of the utility model registration claim, characterized in that a diffuser plate is disposed on the front side of the light guide.