JPS606961Y2 - Vehicle lighting lens - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lens used in a vehicle lamp such as a front lamp of an automobile.

Vehicle lamps generally include a reflecting mirror and a lens, and a desired light distribution pattern is obtained by applying small lens processing to the lens.

An elliptical light distribution pattern is desired.
This type of pattern can be obtained by forming lens steps in a hexagonal shape and arranging these lens steps in a sequentially connected manner.

With such a configuration, the light distribution pattern becomes hexagonal, so it can be approximated to a substantially elliptical shape.

However, while the shape of the required light distribution pattern is an important requirement, the magnitude of the intensity is also important as a light distribution characteristic, and high brightness in the center is required.

The present invention was made in view of the above-mentioned vehicle condition, and aims to provide a lens for a vehicle lamp that can efficiently obtain a required light distribution pattern.

The lens according to the present invention forms two types of small spherical lenses whose cutting points are the intersection of vertical lines at predetermined intervals and horizontal lines at predetermined intervals, and the intersection of their respective median lines, and has a hexagonal and quadrilateral aggregate pattern. It is characterized by this.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

In Fig. 1, 1 is a lamp housing that also serves as a reflector;
2 is a light bulb as a light source, 3 is a lens, and this lens 3
A small lens cut is applied to obtain the required light distribution pattern.

This small lens cut is formed by a lens mold, and as shown in FIG.
The third cutting point is the intersection point O between the
As shown in the figure, two types of cutting tools R1 and R2 have different curvatures.
The mold 4 is formed by cutting.

In this case, the depth of cut of the cutting tool R2 is the cutting point P
The cutting path is set so that it touches the cutting point O with the center at Set it so that it is the same as

When cutting is performed in this order using the cutting tools R1 and R2 based on the set values, a shape is obtained in which a hexagonal portion A and a quadrangular portion B are combined, as shown in FIG.

In a lens formed using such a lens mold, the small lenses in the hexagonal part have the curvature of the cutting tool R2, and the small lenses in the quadrangular part have the curvature of the cutting tool R1. As for the lens as a whole, the outer shape of the pattern 4 is hexagonal as shown in FIG. 5, and a high-intensity quadrangular pattern z2 is formed overlappingly at the center of the pattern 4.

Note that pattern 4 is a required light distribution pattern.

As described above, according to the present invention, hexagonal small lenses having a predetermined curvature are arranged vertically and horizontally, and the four hexagonal small lenses surround the four hexagonal small lenses and have a quadrangular shape having different curvatures. Since the small lenses are arranged, the overall light distribution pattern becomes hexagonal, and a similar high-intensity square pattern is formed in the center of the hexagonal small lenses. This makes it possible to efficiently obtain a desired light distribution pattern.

[Brief explanation of the drawing]

The drawings show an embodiment of the lens for a vehicle lamp according to the present invention. Figure 1 is a sectional view of the entire lamp, and Figure 2 shows the cutting points and cutting depth when forming a small lens. FIG. 3 is a schematic diagram of a cutting tool used for forming a mold, FIG. 4 is a schematic diagram of a small lens pattern, and FIG. 5 is a schematic diagram of a light distribution pattern. 1... Lamp housing, 2... Bulb, 3... Lens, 0... Intersection of vertical line X and horizontal line Y, P...・Intersection of median lines n and m, q...
...Intersection of vertical line X and median line n, R□, R2...
...Cutting tool, 4-Z3...Light distribution pattern.

Claims (1)

[Scope of utility model registration request] A group of spherical lenslets centered at each intersection of a plurality of vertical lines at predetermined intervals and a plurality of horizontal lines at a predetermined interval, and a group of spherical lenslets centered at each intersection of a median line between each of the vertical lines and a median line between each of the horizontal lines. and another spherical small lens group, the spherical small lens group having a different curvature from the other spherical small lens group.