JPH03641Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to automotive lighting equipment such as turn signal lamps, back-up lamps, stop lamps, tail lamps, and combination lamps that are a combination of these lamps. be.

<Conventional technology> Recent automotive lighting equipment is seen as a part of the car body design, and there is a tendency for emphasis to be placed on the exterior design. There is a need for devices that provide light and make the presence of the lamp itself as inconspicuous as possible when it is not lit, or that it looks like an ornament.

However, conventional lamps of this type have not been able to fully satisfy these requirements.

<Problems to be solved by the invention> The present invention was made in view of these requirements, and even though it has a simple structure, it can sufficiently perform the function of a sign as a lamp when turned on, and at the same time has a good appearance. To provide a lighting fixture for an automobile which can provide light distribution, improve the appearance from the front of the lamp when not lit, and satisfy the requirements for decoration.

<Means for solving the problem> The automotive lamp of the present invention that achieves the above purpose has the following features:
In an automobile lamp in which a bulb is installed in the lamp body and an outer lens and an inner lens are installed in parallel at the front opening of the lamp body, the outer lens is formed as a transparent body without a light distribution function, and its thickness is reduced. The inner lens is formed in a stepped manner from the center to the periphery, and the inner lens has a refractive lens step formed in the center and a reflective lens step in the periphery. It is characterized in that the boundary line with the reflective lens step is formed in a shape substantially similar to the step line where the thickness of the outer lens changes.

<Example> Hereinafter, an example of implementing the present invention will be described based on the drawings.

The automotive lamp according to the present invention has a bulb 3 installed in a lamp body 4 formed into a desired shape, and an inner lens 1 in the front opening of the lamp body 4, as in the conventional case.
and an outer lens 2 are arranged in parallel.

The outer lens 2 is mainly used to improve the appearance of the front of the lamp when it is not lit.
It is made of transparent resin material such as glass material or acrylic resin, and has no light distribution function, and is colored with clear (white) or the same color or similar color as the car body color, and its thickness is improved by changing its inner surface. By gouging, it is formed thicker in a stepped manner from the center part 2a to the peripheral part 2b. At this time, each step line 7 formed at the boundary between the thin and thick portions adjacent to each other is formed into a circular shape in accordance with the lens pattern of the inner lens 1, that is, the concentric circular pattern of the Fresnel lens 5, which will be described later. Or, if the front opening of the lamp is formed in a horizontally oblong shape,
It is preferable to form it into a substantially elliptical shape when viewed from the front as in the illustrated embodiment. By forming each step line 7 of the outer lens 2 in this manner, it becomes easy to harmoniously fuse with the lens pattern of the inner lens 1.
Furthermore, by coloring the outer lens 2 in the same color or similar color to the vehicle body color, the sense of unity between the outer lens and the vehicle body can be improved, and the presence of the lamp itself can be made less noticeable.

The inner lens 1 is intended to perform the light distribution function as a lamp, and is molded using a glass material or a colorless transparent resin material such as acrylic resin, and is opposed to the bulb 3 so as to obtain the desired light distribution. A concentric Fresnel lens 5 is formed on the side surface, and is colored red or yellow as necessary.
Fresnel lens 5 formed on inner lens 1
has a refractive lens step 5a formed at its center a, and a reflective lens step 5b formed at its periphery b, and these refractive lens steps 5a
A boundary line 6 between the outer lens 2 and the reflective lens step 5b is formed to have a substantially similar shape to a step line 7 where the thickness of the outer lens 2 changes when viewed from the front. In the illustrated example, the stepped line 7 where the thickness of the outer lens 2 changes
Since the boundary line 6 is formed into a substantially elliptical shape, the boundary line 6 is formed into a substantially elliptical shape.

However, if the bulb 3 is installed in the lamp body 4 and the inner lens 1 and the outer lens 2 are installed in parallel at the front opening of the lamp body 3 with an appropriate interval,
The light from the bulb 3 enters the inner lens 1 and passes through the refractive lens step 5 of the Fresnel lens 5.
a and a reflective lens step 5b, and the light is distributed through the outer lens 2.

<Effects of the invention> Since the automotive lamp of the invention is constructed in this way,
When lit, the light from the bulb is controlled by the inner lens, which has a light distribution function, and is distributed as required through the transparent outer lens, which does not have a light distribution function, allowing it to fully demonstrate its sign function as a lamp. .

In addition, the thickness of the outer lens is made thicker in a step-like manner from the center to the periphery, so when the lamp is viewed from the front, when the light is turned on, it is thicker from the thinner center. It is possible to create a subtle difference in luminous intensity toward the periphery, and when not lit, the difference in brightness (transparency) gradually increases from the thinner center to the thicker periphery. When the outer lens is colored, the colored hue gradually changes to create a subtle change in density, and therefore, when lit, it looks like an ornament. Good light distribution can be obtained, and when the lamp is not lit, the appearance of the lamp can be improved and the requirements for decoration can be satisfied.

Furthermore, a refractive lens step is formed at the center of the inner lens, and a reflective lens step is formed at the periphery, and the thickness of the outer lens changes at the boundary between the refractive lens step and the reflective lens step. Since it is formed in a shape that is almost similar to the stepped line, it harmonizes with the difference in luminous intensity due to changes in the thickness of the outer lens when the light is turned on, eliminating any strange feeling.
A good-looking light distribution can be obtained.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

The drawing shows an embodiment of the automotive lamp of the present invention.
FIG. 1 is a schematic cross-sectional view, and FIG. 2 is a partially cutaway front view. In the figure, 1 is the inner lens, 2 is the outer lens, 2a is the center of the outer lens, 2b is the periphery of the outer lens, 5a is the refractive lens step, 5b is the reflective lens step, 6 is the boundary line,
7 is a dashed line.

Claims (1)

[Scope of utility model registration request] In an automobile lamp in which a bulb is installed in the lamp body and an outer lens and an inner lens are installed in parallel at the front opening of the lamp body, the outer lens is formed as a transparent body without a light distribution function, and its thickness is reduced. The inner lens is formed in a stepped manner from the center to the periphery, and the inner lens has a refractive lens step formed in the center and a reflective lens step in the periphery. An automobile lamp characterized in that a boundary line between the reflective lens step and the outer lens is formed in a shape substantially similar to the step line where the thickness of the outer lens changes.