JPH059762Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has a cylindrical side reflecting surface extending backward from the front lens and a bolloid-shaped main reflecting surface at the rear, and the focal point The present invention relates to a vehicle headlamp in which a light source is disposed in the vehicle headlamp.

[Problems that conventional technology and ideas try to solve]

Automotive headlamps are sometimes required to be thinner in order to improve aerodynamic performance or from a design standpoint. However, if the vertical width of the lens and cylindrical reflector are simply made thinner for this purpose, the amount of diffused reflection on the side reflective surfaces will increase, the amount of light irradiated parallel to the front will be relatively reduced, and the beam width will be reduced. There is a growing problem.

Therefore, according to the lamp structure disclosed in Japanese Utility Model Application Publication No. 62-96203, the side reflecting surfaces are bulged and a sub-reflector is separately arranged, so that the direct irradiation light from the light source is directed obliquely to the focal point. It is possible to reflect it. However, it is structurally complicated because it has a bulging structure and requires a separate sub-reflector.

Therefore, an object of the present invention is to provide a vehicle headlamp that can be made thin with a simple structure without impeding beam directionality.

[Means for solving problems]

In order to achieve this objective, the present invention includes a substantially rectangular lens on the front surface, a cylindrical side reflecting surface toward the rear from this lens, and a bolloid-shaped main reflecting surface on the rear surface. In addition, in a vehicle headlamp in which a light source is disposed at the focal point of this boromorphic surface, and at least the upper and lower side reflective surfaces are formed in a flat shape parallel to each other, at least the peripheral portion of the upper end or the lower end of the lens 11. are formed as stepped lenses 11a and 11b that are displaced rearward from the lens exposure surface A so that the vehicle members 1 and 2 located around the headlight 10 are placed in front, and these stepped lenses The interior of the surface is subjected to a reflection treatment to receive reflected light incident parallel to the side reflection surface from the corresponding peripheral portion of the main reflection surface 13 and reflect it toward the focal point 17. Surfaces 16, 16a
It is characterized by being formed as

Note that the symbols in parentheses refer to those in the embodiment described later.

[Effect]

Sub-reflection surfaces 16, 16a parallel to the main reflection surface 13
The incident light is reflected toward the focal point 17, then re-reflected by the main reflecting surface 13 near the focal point, passes through the exposed portion A of the lens 11 in parallel, and effectively illuminates the front.

[Example of idea]

In FIG. 1, reference numeral 10 denotes a headlamp disposed in a gap 3 between the tip of the hood 1 and the bumper 2.
At the upper and lower peripheral parts of the rectangular lens 11 located at the front of this headlamp, there is a part A exposed in the gap 3 so as to be hidden behind the hood 1 and bumper 2.
A stepped lens surface 11a is formed which is displaced rearward relative to the lens surface. At the end of the stepped lens surface 11a,
Side reflective surface 1 which is cylindrical as usual towards the rear
2 and a reflector having a main reflecting surface 13 in the shape of a boroboloid are attached to the rear surface thereof, and a bulb 14 is disposed at the focal point 17 of this boroboloid. The above-mentioned stepped lens surface 11a has an inner surface that becomes a sub-reflection surface through a reflection treatment such as painting or plating, and reflects reflected light that is incident in parallel along the side reflection surface 12 from the corresponding peripheral portion of the main reflection surface 13. As described above, it is displaced rearward and curved in the vertical and lateral directions so as to reflect the light toward the focal point 17.

With the headlamp 10 attached, the tip of the hood 1 is placed on the outer surface of the upper stepped lens surface 11a so that it is almost flush with the exposed portion A of the lens 11, and the lower stepped lens surface 11a By invading and placing the end of the bumper 2 on the outer surface of the lens surface 11a,
The upper and lower stepped lens surfaces 11a are covered and are not exposed. Then, when the bulb 14 is turned on, the irradiated light is directly or reflected by the main reflecting surface 13, and is irradiated forward through the exposed portion A, which is essentially a lens surface. At this time, the stepped lens surface 1
Reflected light from the periphery of the main reflecting surface 13 facing each other along the upper and lower side reflecting surfaces 12 that are substantially parallel to each other and flat enters the sub-reflecting surface 16 of 1a in parallel, and therefore enters the focal point 17 in parallel. The light is further reflected toward the direction and re-reflected in parallel at the central portion of the main reflecting surface 13 to irradiate the front with light. As a result, even if the exposed portion A is made thinner, the amount of diffusely reflected light is suppressed, and the beam width does not become abnormally wide.

In addition, in the above-mentioned embodiment, the stepped lens surface 11
A can also be formed only at the upper periphery of the lens 11 on the hood 1 side or the lower periphery on the bumper 2 side. Furthermore, instead of narrowing the width in the vertical direction, it is possible to form a stepped lens surface on the left and right peripheries or on the entire periphery, which is covered by vehicle members, as the case may be.

Furthermore, the horizontal direction of the stepped lens surface 11a shown in FIG. 1 is formed completely as a curved surface along the curve B in FIG. As an example, as shown in FIG. 2, in order to similarly avoid increasing the lens depth, the inner surface of the stepped lens surface 11b, which is shallowly curved except for the central portion, is made into a plurality of serrated sub-reflection surfaces 16a. It is also possible to form.

[Effect of idea]

As described above, according to the present invention, the peripheral portion of the lens that is not visible from the outside is integrally formed as a stepped lens surface for the secondary reflective surface without reducing the area of the main reflective surface to accommodate the thinned lens surface. With a simple structure, the reflected light from the bollard surface can be effectively irradiated forward, and the front surface of the headlight can be made thinner without interfering with the beam characteristics. This thinning allows the front end of the vehicle to be kept low, improving aerodynamic performance and increasing design freedom. The sub-reflection surface is easily formed by subjecting the inner surface of the stepped lens surface to a reflection treatment.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a headlamp according to one embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of a sub-reflection surface according to another embodiment. DESCRIPTION OF SYMBOLS 1...Hood, 2...Bumper, 10...Headlight, 11...Lens, 11a, 11b...Stepped lens surface, 12...Side reflective surface, 13...Main reflective surface, 14... Bulb, 16, 16a... Sub-reflection surface, 17... Focal point.

Claims (1)

[Claims for Utility Model Registration] A substantially rectangular lens is provided on the front surface, and a cylindrical side reflecting surface is provided rearward from the lens, and a bolloid-shaped main reflecting surface is provided on the rear surface,
In a vehicle headlamp in which a light source is arranged at the focal point of this boromorphic surface, and at least the upper and lower side reflective surfaces are formed in a flat shape parallel to each other, at least the peripheral portion of the upper or lower end of the lens is located at the front. The lens is formed as a stepped lens surface that is displaced toward the rear from the exposed surface of the lens so that a vehicle member located around the light is placed in front, and the inner surface of the stepped lens surface is subjected to reflective treatment. It is characterized by being formed as a sub-reflection surface that receives reflected light incident parallel to the side reflection surface from the corresponding peripheral portion of the main reflection surface and reflects it toward the focal point. Vehicle headlights.