JPH02309502A - Headlamp for vehicle - Google Patents

Abstract

PURPOSE:To control the generation of spectral small by performing a surface treatment for lowering the transmittance in the predetermined area of an outer lens. CONSTITUTION:Prism serving as trimming simultaneously is formed on the front surface of an outer lens 5 in front, and the area corresponding to an inner lens 21 of a high beam unit 9 and an inner lens 29 of a low beam unit 7 become transparent parts 35, 37 having 100% of transmittance. A surface treatment P for lowering the transmittance is performed on the outer lens 5 by Al evaporation or the like. The surface treatment is performed over the whole area except for the area D corresponding to a fog lamp unit 1 and the transparent parts 35, 37, and the transmittance of the area on which the surface treatment is performed is set at about 5%. Therefore, it is hindered to see inside directly. The surface treatment is further performed on the top chord part 41 and the bottom chord part 42 of the transparent part 37 corresponding to the inner lens 29 of the low beam unit 7, and the transmittance of these area is set at about 30 %.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention relates to a vehicle headlamp.

(Conventional technology) Generally, vehicle lights have long-distance illumination that allows you to see obstacles more than 100 meters in front of you at night, and lights that are dimmed so as not to give glare to oncoming vehicles when you pass them. It is essential that the structure be capable of emitting light or converting upward light into downward light.

Examples of the latter type of lighting include Service Bulletin No. 599 E- issued by Nissan Motor Co., Ltd. in May 1986.
The one described on page 5 is known.

That is, as shown in FIG. 4, in front of the reflector 103 that reflects the light from the bulb 101 forward, and inside the outer lens 105 that also serves as a cover, there is a convex lens 107 of the optical system that serves as an inner lens, and a convex lens 107. A shade 109 that cuts upward light between the bulb 101
The structure is such that each has its own structure.

(Problems to be Solved by the Invention) As described above, the convex lens 107 of the optical system is provided inside the outer lens 105, and the convex lens 107 is connected to the shade 1.
It has an aspherical shape with the 09 side being a vertical surface. Therefore, the light reflected from the reflector 103 is irradiated forward with the upward light being cut off by the shade 109 and the convex lens 107. At this time, the convex lens 10
Since the upper chord part a and the lower chord part 7 of 7 have the shape of a triangular prism, when the light passes through the upper chord part a and the lower chord part 2, it is separated,
A color different from the light source color (generally rainbow colors) is generated. This tendency is particularly strong when the downward beam is used as a passing beam, giving a sense of discomfort to the viewer and deteriorating the sense of quality.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle headlamp that can reduce the generation of spectral light and also prevents the interior from being directly visible from the outer lens.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, in this invention, in front of a reflector that reflects light from a bulb forward,
In a headlamp that includes an inner lens and a shade on the inside of an outer lens that also serves as a cover, the outer lens is subjected to a surface treatment to reduce transmittance, and the surface treatment excludes an area corresponding to the inner lens. all@
area, and the area covering the upper and lower chord parts of the inner lens.

(Function) According to such a vehicle headlamp, the light beam from the bulb is reflected by the lefter, and is irradiated forward as downward light by the shade and inner lens. At this time, the spectral light that has passed through the inner lens is absorbed when passing through the surface treatment section of the outer lens, and as a result, the spectral light is kept small, eliminating the sense of discomfort caused by passing beams. Furthermore, since the interior is not directly visible due to the surface treatment performed over the entire @ area, it becomes possible to omit the need for a blindfold member.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 3.

In the figure, reference numeral 1 indicates a housing of a headlamp 3 that is attached to the vehicle body, and reference numeral 5 indicates an outer lens that also serves as a cover, and the outer lens 5 is bonded to the housing 1 by hot melt means.

A passing beam unit 7 is attached to the housing 1 from the outside.
A traveling beam unit 9 and a fog lamp unit 11 are respectively assembled.

The fog lamp unit 11 includes a bulb 13 and a reflector 15 that reflects the light from the bulb 13 forward.

The traveling beam unit 9 includes a bulb 17, a reflector 19 having a paraboloid that reflects the light from the bulb 17 forward as upward light, and an inner lens such as an aspherical convex lens that focuses the reflected light of the reflector 79. The inner lens 21 is assembled to a frame 23 fixed to the reflector 19.

The offset beam unit 7 has a valve 25 and a valve 25.
A reflector 27 having a paraboloid that reflects the light forward as downward light, an inner lens 29 such as an aspherical convex lens that focuses the reflected light of the reflector 27, and a space between the inner lens 29 and the bulb 25. It is a projector headlamp consisting of a shade 31 arranged at the front. The inner lens 29 is attached to a frame 33 fixed to the reflector 27. Further, the shade 31 is fixed to the frame 33, and is set at a height that substantially covers the lower half of the inner lens 29. As a result, the shadow formed by the shade 31 is projected 1" forward, thereby cutting upward light and making it possible to clearly distinguish between bright and dark.

On the other hand, a prism that also serves as a cosmetic is formed on the front surface of the front outer lens 5, and includes an inner lens 21 of the traveling beam unit 9 and an inner lens 29 of the passing beam unit 7.
The area corresponding to 35.37 is a transparent area with a transmittance of 100%.
It becomes.

Further, the outer lens 5 is subjected to a surface treatment P that reduces the transmittance of the outer lens 5. Although the surface treatment P is carried out by vapor deposition of aluminum, it is also possible to use means such as metal sputtering or semi-transparent coating.

The surface treatment P area is applied to the entire area except for the area corresponding to the fog lamp unit 11 and the transparent portion 35, 37, and the transmittance of the surface treatment P area is set to approximately 5%. There is.

This prevents the inside from being directly visible.

Furthermore, the inner lens 29 of the passing beam unit 7
This is also applied to the regions of the upper chord part 41 and lower chord part 42 of the transparent part 37 corresponding to the above, and the transmittance of these regions is set to approximately 30%.

Note that in the traveling beam unit 9, the spectral spectrum is hardly noticeable, so surface treatment of the upper and lower chord parts of the transparent part 35 of the outer lens 5 is omitted, but it may be carried out. be.

The vehicle headlamp configured as described above can be used as a fog lamp by lighting the bulb 13 of the fog lamp unit 11.

Further, by lighting the bulb 17 of the traveling beam unit 9, the light is emitted forward as upward light.

Roughly speaking, by lighting the bulb 25 of the passing beam unit 7, the upward light is cut by the shade 31 and the inner lens 29 and is irradiated forward as downward light. At this time, as shown in FIG.
As a result of being absorbed by the surface-treated P portion, the spectral spectrum at the time of passing beams is suppressed to a small size, and no discomfort occurs.

On the other hand, the interior is no longer directly visible due to the surface treatment P, and the need for a blindfolding member can be omitted.

[Effects of the Invention] As described above, according to the vehicle headlamp of the present invention, the surface treatment performed on the outer lens makes it possible to suppress the generation of spectral light to a small level, thereby improving quality. Furthermore, since the blindfolding member can be omitted, it is very preferable in terms of assembly man-hours and costs.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of a vehicle headlamp of the present invention, Fig. 2 is a cutaway plan view of the same, Fig. 3 is a front view of the same, and Fig. 4 is similar to Fig. 1 showing a conventional example. FIG. 5...Outer lens 25...Bulb 27...Reflector 2...Inner lens 31...Shade 41...Upper string section 42...Lower string section Agent Patent attorney Hide Miyoshi Kazudai 4th figure

Claims (1)

[Claims] In a headlamp that includes an inner lens and a shade in front of a reflector that reflects light from a bulb forward and inside an outer lens that also serves as a cover, the outer lens is subjected to a surface treatment that reduces transmittance. In addition, the vehicle headlamp is characterized in that the surface treatment is applied to the entire area excluding the area corresponding to the inner lens and the area corresponding to the upper chord part and the lower chord part of the inner lens.