JPS593804A - Lens of lamp for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a lens for an automobile lamp.

In an automatic/military lamp with a 7-lens lens installed in front of the lamp, it is easy to direct the direct light from the pulp to the front (front direction) of the lamp by directing it almost parallel to the optical axis. It was difficult to actively control the car in the lateral direction.

Therefore, an outer lens with a diffusion step was installed in front of the 7-Renel lens, but it was still not possible to control the light in the lateral direction sufficiently.

However, in countries with European standards, it is necessary to satisfy the light distribution standard not only in the front direction but also in the 80° horizontal direction, so conventionally the light was diffused in the front of the lamp body (1) as shown in Figure 1. an outer lens (2) forming a lens step;
Inner lens with Fresnel lens step (3
), and also a side reflector (4) inside the light body (1).
) was installed to satisfy the light distribution standard in the 80° horizontal direction. Therefore, the number of parts and the number of assembly steps are increased, which inevitably leads to an inconvenience and a high cost. Moreover, the step pattern of the Fresnel lens step was visible from the front, and the exterior appearance was poor.

In view of these inconveniences of conventional products, the present invention is capable of sufficiently refracting or diffusing direct light from pulp in the lateral direction without using special side reflectors or outer lenses, and is more effective than conventional products. It is an object of the present invention to provide a lens for an automobile lamp that can reduce the number of parts and assembly man-hours, and reduce costs.

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

The lamp body (1) has a pulp (5) stored therein and a lens (6) installed on one front side, and an outer lens (2) installed at an appropriate interval outside the lens (6) as needed.
). Note that the outer lens (2) is formed with a lens step (2a) that appropriately diffuses or refracts the light that has passed through the lens (6), similar to the conventional product.

The lens (6) has a Fresnel lens step (6a) formed on the inner surface facing the pulp (5) to collect the direct light (a), middle), and (c) of the pulp (5), and has a Fresnel lens step (6a) on the outer surface. An appropriate number of parallel lens steps (6b) are formed in parallel to refract or diffuse part (a) and (c) of the collected light in the lateral direction.

The Fresnel lens step (6a) directs the direct light (a) from the pulp (5) so that it is parallel to the optical axis. It is formed by concentrically protruding lens steps, and the central part (61L) is formed like a convex lens or a concave lens depending on the need, or it is formed as a non-step without a lens f[.

The lens step (6b) is a 7-lens lens step (6b).
This is to refract or diffuse part of the light (a) and (c) collected in step a) in the lateral direction (e.g. 80° lateral direction), and it is a continuous straight line or curved shape as illustrated in Figure 3. They are formed in parallel to each other at appropriate intervals on the outer surface of the lens (6).

This lens step (6b) has a protruding cross-sectional shape in the shape of a triangular prism (examples in Figures 2 and 3), a protruding shape in the shape of a bullet (example in Figure 4), or conversely, a warhead shape. As a general rule, some of the light (a) and (c) condensed by the 7-lens lens step (6a) is laterally refracted (as in the example of Figs. 2 and 3) or diffused (as in the example of Fig. 5). (Example in Figures 4 and 5)

Further, the interval portion (6C) between each lens step (6b) is formed into a non-step having no lens function.

(Example shown in FIGS. 2 and 3) is also formed like a convex lens.

(Example in Figure 4) or concave lens-like (Example in Figure 5) can be adopted depending on the purpose, and most of the light focused by the Fresnel lens step (6a) is at this interval. Part (6
o) and is distributed to the front of the lamp body (1).

In addition, in the explanation below (2), an example was given of controlling the pulp (direct light intensity from the 5th hole) (c), but it is also possible to control the reflected light from the reflecting mirror using a reflecting mirror. That will be easily understood.

In this way, the present invention forms a Fresnel lens step on the inner surface of the lens installed on the front of the lamp body, and forms an appropriate number of parallel lens steps in parallel on the outer surface to refract or diffuse light laterally. Therefore, it is possible to reduce costs by reducing direct light from the pulp or reflected light from a reflecting mirror without using special side reflectors or outer lenses as in conventional products.

Moreover, since an appropriate number of lens steps are formed in parallel in parallel on the outer surface of the lens, the step pattern of the Fresnel lens steps formed on the inner surface becomes difficult to see, improving the appearance of the lens and at the same time blocking light in the lateral direction. can be easily controlled.

Therefore, it is possible to achieve the desired purpose.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional example, Figs. 2 to 5 show an embodiment of the lens of the present invention, Fig. 2 is a sectional view of the lens assembled into a lamp, and Fig. 3 is a sectional view of the same lens. A perspective view, FIG. 4 is a sectional view of a main part of a lens showing another embodiment, and FIG. 5 is a sectional view of a main part of a lens showing still another embodiment. In the figure, (1) is a lamp body, (6) is a lens, (6a) is a Fresnel lens step, and (61) is a lens step. Figure 1 Figure 2

Claims (1)

[Claims] A Fresnel lens step is formed on the inner surface of the lens installed on the front surface of the lamp body, and an appropriate number of lens steps for refracting or diffusing light laterally are formed in parallel on the outer surface. Automotive lighting lenses.