JPS6242413Y2 - - Google Patents

Description

[Detailed explanation of the invention] Recently, a new structure has been developed for vehicle lighting, especially rear combination lamps, that emits two colors of light (for example, red and yellow) from a single lens. .

The present invention provides that, in the above-mentioned novel vehicle lamp, there are two
The present invention relates in particular to the structure of the reflecting portion of a lamp equipped with two bulbs, and its purpose is to make its light distribution characteristics as uniform as possible.

First, let's talk about the light fixture that the inventor of the present invention was developing as a prototype before coming up with the idea, with reference to Figure 1, which shows a cross-sectional view of the main parts. For example, B is a lens made of resin or the like formed on a fisheye diffusing lens element consisting of a convex lens, and B is formed so that the bottom part is depressed so as to have a V-shaped cross section, and the center lines a and a' are Bulbs b ₁ and b ₂ are arranged symmetrically, and the reflecting portion R _f is formed so that its focal point F coincides with the center point connecting the light emitters of each bulb b ₁ and b ₂ . ₁ , b _{and 2} show a lamp body formed to provide a common paraboloid.

However, in this way, the reflecting section R _f
Since each light emitting source of each bulb is arranged at the pseudo central focus of the reflecting part R _f so as to coincide with the center point connecting the light emitting bodies of b ₁ and b ₂ , for example, the light passing through the focus F The light x is correctly reflected and projected forward, but the other lights are projected obliquely to the light x, as shown by symbols y and y'. When viewed from the front, the center of the lens is strongly illuminated, and the outer periphery is weakly illuminated, resulting in a problem that the so-called light distribution characteristics become non-uniform.

This proposal aims to solve the difficulties in the above-mentioned prototype technology as much as possible, and the specific configuration of an embodiment thereof will be described in detail below with reference to FIG. 2.
Figure 2 is a cross-sectional view of the main parts of the proposed lamp, similar to Figure 1. The same parts as those described in Figure 1 are given the same reference numerals, redundant explanations are omitted, and only the features of the proposed lamp are described. In other words, the reflective part R _f is centered on the center line a,
Because it is formed symmetrically with a′ as the border,
For the sake of convenience, only the right side will be described. The part P is a paraboloid of revolution whose focal point is the center of the filament of the valve R on the left side, and on this paraboloid, A vapor deposition,
A reflective surface is formed by coating metal or the like, and serves as a reflective mirror for irradiating the light from the bulb R to the outside.

Further, a portion Q is a paraboloid of revolution having a focal point at the center of the bulb G, and similarly to the paraboloid P, a reflecting surface is formed.

These paraboloids P and Q are sequentially alternated and their focal lengths are sequentially changed, so that they are continuously arranged in a stepwise manner so as to reach the outside.

The present invention has the above-mentioned configuration. Next, to describe the operation and effect, the part P has its focal point coincident with the light source of the bulb R on the left, and the part Q has the same focus with the light source of the bulb G on the right. A paraboloid is formed in each case, and the paraboloids in this state are arranged so as to be successive alternately, so that the light from bulb R is at the P part, the light from bulb G is at the Q part, respectively. As shown by numerals ₁ and ₂ , the light is correctly projected forward parallel to the optical axis (center line a-a'), and on the other hand, the light from bulb R is projected at the Q location, and the light from bulb G is projected at the P location. , are reflected by the paraboloids which are out of focus, so the light is projected outward as shown by symbols ' ₁ and ' ₂ . That is, P site,
Since the paraboloids are successively arranged stepwise with the light source of every other bulb as the focal point, each paraboloid is connected to the light source of the bulb placed at its own focal point. Only the light is correctly projected forward, and the light from the bulb located at the out-of-focus position is projected outward so as to obliquely intersect the orthogonal projection light, so that the orthogonal projection light is mixed with the oblique projection light, A uniform light distribution pattern can be obtained on the lens L surface, and the lamp body itself can be made thinner, making it an extremely effective configuration for a lamp with two bulbs.

In the lamp of the present invention, for example, if bulb R is red and bulb G is green, red light will be emitted from the lens of the lamp when bulb R is lit, and it can be used as a tail lamp or stop lamp. When the bulbs G are lit at the same time, yellow light can be emitted by light synthesis and can be used as a turn signal lamp. Further, the bulb G may be used to emit yellow light or white light, and can be changed as appropriate to meet the desired irradiation light requirements generated by each lamp.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of the prototype stage, and FIG. 2 is the main part of the actual design. B... Lamp body, R, G, b ₁ , b ₂ ... Bulb, R _f
...Reflector, F...focal point.

Claims (1)

[Scope of utility model registration request] A lens L that is transparent or semitransparent and has a plurality of lens elements formed on its back surface, and two lenses inside it.
bulbs R and G, with a reflecting portion R _f on the inner surface thereof.
and a lamp body B formed with
The vehicle lamp is characterized in that the reflecting portion R _f is formed by alternately and continuously forming paraboloids that focus on the light sources of one bulb and the other bulb, respectively.