JP2767886B2 - Vehicle headlights - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a vehicle headlamp.

(Prior art) Generally, the lighting of a car light is illuminated at a long distance so that obstacles more than 100 m ahead can be confirmed at night, and dimmed so as not to give glare to oncoming vehicles when passing by oncoming vehicles. Or, it is an essential requirement that the structure be capable of converting upward light into downward light.

Illumination lamps of the latter type include, for example, Service Report No. 599 E-5 issued by Nissan Motor Co., Ltd. in May 1988.
The ones described on page are known. That is, as shown in FIG. 4, a reflector 1 for reflecting light from the bulb 101 forward.
In front of 03 and inside the outer lens 105 also serving as a cover, a convex lens 107 of an optical system serving as an inner lens,
A shade 109 for cutting upward light is provided between the convex lens 107 and the bulb 101, respectively.

(Problem 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 has an aspheric shape in which the shade 109 side is a vertical surface. Accordingly, the light reflected from the reflector 103 is emitted forward with the upward light cut by the shade 109 and the convex lens 107. At this time, since the upper chord portion a and the lower chord portion b of the convex lens 107 have the shape of a triangular prism, light is emitted from the upper chord portion.
a, when passing through the lower chord b, the light is separated and a color different from the light source color (generally iridescent) is generated. This tendency is particularly pronounced in the case of a low-pass light passing beam, giving the viewer a sense of incongruity and lowering the quality.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle headlamp capable of reducing the generation of spectral components and simultaneously making the interior invisible from an outer lens.

[Constitution of the Invention] (Means for Solving the Problems) In order to achieve the above object, according to the present invention, an outer lens which also serves as a cover in front of a reflector for reflecting light from a bulb forward is provided. On the inside, in the headlight provided with the inner lens and the shade, the outer lens is subjected to a surface treatment for lowering transmittance, and the surface treatment is performed in all regions except for a region corresponding to the inner lens, and It is set in the region of the upper chord and lower chord.

(Operation) According to the vehicle front turn-off, the light from the bulb is reflected by the reflector, and is radiated forward by the shade and the inner lens as downward light. At this time, the spectrum that has passed through the inner lens is absorbed when passing through the surface treatment section of the outer lens, and the spectrum is suppressed to a small value. Further, since the inside is not directly visible due to the surface treatment performed over the entire area, the blindfold member can be omitted.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings of FIGS.

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

A low beam unit 7, a traveling beam unit 9, and a fog lamp unit 11 are assembled to the housing 1 from the outside.

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

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

The passing beam unit 7 includes a bulb 25, a reflector 27 having a parabolic surface that reflects light from the bulb 25 forward as downward light, an inner lens 29 such as an aspheric convex lens that focuses the reflected light of the reflector 27, The projector headlamp includes a shade 31 disposed between the inner lens 29 and the bulb 25. The inner lens 29 is a frame fixed to the reflector 27
33 is installed. Further, the shade 31 is fixed to the frame 33, and is set at a height at which the lower half of the inner lens 29 is covered. This allows the shade 31
By projecting a shadow that can be projected forward, the upward light is cut, and the distinction between light and dark can be clearly obtained.

On the other hand, a prism serving also as a makeup is formed on the front surface of the front outer lens 5, and a region corresponding to the inner lens 21 of the traveling beam unit 9 and the inner lens 29 of the passing beam unit 7 has a transparent portion 35 having a transmittance of 100%. , 37.

The outer lens 5 is subjected to a surface treatment P for reducing the transmittance of the outer lens 5. The surface treatment P is performed by vapor deposition of aluminum, but may be performed by means such as metal sputtering or translucent coating.

The area of the surface treatment P is applied to the entire area except for the area D corresponding to the fog lamp unit 11 and the transparent portions 35 and 37, and the transmittance of the area of the surface treatment P is approximately 5%.
% Is set. Thereby, the inside is not directly visible.

Furthermore, the inner lens 29 of the passing beam unit 7
Is applied to the region of the upper chord 1 and the lower chord 42 corresponding to the transparent portion 37, and the transmittance of this region is set to approximately 30%.

In the traveling beam unit 9, since the spectral distribution is hardly noticeable, the surface treatment of the upper chord and the lower chord of the transparent portion 35 of the outer lens 5 is omitted, but may be performed. is there.

The vehicular headlamp thus configured can be used as a fog lamp by turning on the bulb 13 of the fog lamp unit 11.

When the bulb 17 of the traveling beam unit 9 is turned on, the light is emitted forward as upward light.

Further, when the bulb 25 of the passing beam unit 7 is turned on, the upward light is cut by the shade 31 and the inner lens 29 and is radiated forward as downward light.
At this time, as shown in FIG. 1, the spectral component x passing through the inner lens 29 is subjected to the surface treatment P of the upper chord portion 41 and the lower chord portion 42 of the front transparent portion 37.
As a result of the absorption by the part, the spectrum at the time of the passing beam is suppressed to be small, and the sense of incongruity does not occur.

On the other hand, the interior is not directly seen by the surface treatment P, and the blindfold member can be omitted.

[Effects of the Invention] As described above, according to the vehicular headlamp of the present invention, the surface treatment performed on the outer lens makes it possible to suppress the generation of spectral components to be small, thereby improving the quality. Further, since the blind member can be omitted, it is very preferable in terms of the number of assembling steps and cost.

[Brief description of the drawings]

1 is a cut-away side view of a vehicle headlamp according to the present invention, FIG. 2 is a cut-away plan view of the same, FIG. 3 is a front view of the same, FIG. 4 is the same as FIG. It is a cutting | disconnection outline side view. 5 Outer lens 25 Valve 27 Reflector 29 Inner lens 31 Shade 41 Upper chord 42 Lower chord

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F21M 3/05 F21M 3/02

Claims (1)

(57) [Claims] 1. A headlight provided with an inner lens and a shade in front of a reflector for reflecting light from a bulb forward and inside an outer lens also serving as a cover, wherein the outer lens has a lower transmittance. A headlamp for a vehicle, wherein a surface treatment is performed, and the surface treatment is set in an entire region excluding a region corresponding to the inner lens and in a region covering an upper chord portion and a lower chord portion of the inner lens.