JPH03643Y2 - - 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 configuration, 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 is:
In an automotive 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 thicker from the center to the periphery, and the inner lens is formed with a fisheye prism step, and the diffusion angle of the fisheye prism step becomes smaller from the center to the periphery of the inner lens. It is characterized by the fact that it was formed.

<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 from the center part 2a to the peripheral part 2b. That is, as the thickness of the outer lens 2 increases from the center part 2a to the peripheral part 2b,
The thickness may be formed stepwise as in the illustrated embodiment, or it may be formed gradually thicker into a continuous curved surface. In addition, when forming the outer lens 2 in a stepwise manner from the center part 2a to the peripheral part 2b, if the boundary part 8 between the thin part and the thick part which are adjacent to each other is formed at a right angle, the thickness becomes thinner. The difference in brightness (transparency) between the thin and thick parts is clearly separated, but by forming the boundary part 8 into an acute edge shape as in the illustrated embodiment, the boundary between the thin part and the thick part can be clearly separated. It becomes possible to further emphasize the difference in brightness (transparency) between the thin and thick portions by increasing the thickness of the layer. At this time, each step line 7 is formed at the boundary 8 between the thin and thick portions that are adjacent to each other.
is formed into a circular shape to match the lens pattern of the inner lens 1, which will be described later, that is, the concentric circular pattern of the Fresnel lens 5, or when the front opening of the lamp is formed in a horizontally oblong shape as in the illustrated embodiment. It is preferable to form it into a substantially elliptical shape when viewed from the front. By forming each step line 7 of the outer lens 2 in this manner, it becomes easy to blend harmoniously 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 a fisheye prism step 6 is formed on the surface facing the outer lens 2, and is colored red or yellow as necessary. inner lens 1
The Fresnel lens 5 is formed with a refractive lens step 5a in the center and a reflective lens step 5b in the periphery. The fisheye prism step 6 forms a diffusion angle that gradually decreases from the center to the periphery of the inner lens 1.

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 an appropriate interval in the front opening of the lamp body 3,
The light from the bulb 3 enters the inner lens 1, is controlled by the Fresnel lens 5, and is controlled by the fisheye lens step 6.
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. .

Moreover, since the thickness of the outer lens is made thicker from the center to the periphery, when the lamp is viewed from the front, when the lamp is turned on, the thickness increases from the thinner center to the thicker periphery. It is possible to create a subtle difference in luminous intensity as the light progresses, and when it is not lit, the difference in brightness (transparency) gradually changes from the thin center to the thick peripheral area. Therefore, when the outer lens is colored, the colored hue gradually changes to create a subtle difference in density. Therefore, when the outer lens is lit, it can be used as an arrangement that looks like an ornament. Light 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 fisheye prism step is formed on the inner lens, and the diffusion angle of the fisheye prism step becomes smaller from the center to the periphery of the inner lens, so that the outer lens periphery is somewhat thicker. Even if the outer lens is formed thickly, the periphery of the outer lens, that is, the periphery of the lamp, can be illuminated sufficiently brightly during lighting. Even when used, it can be illuminated with almost uniform brightness as a whole.

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, 6 is the fisheye lens step,
It is.

Claims (1)

[Scope of utility model registration request] In an automotive 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 thicker from the center to the periphery, and the inner lens is formed with a fisheye prism step, and the diffusion angle of the fisheye prism step becomes smaller from the center to the periphery of the inner lens. An automotive lamp characterized by a formed part.