JPH053081B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

TECHNICAL FIELD The present invention relates to a signal light, such as a taillight, mounted on a motor vehicle.

[Conventional technology]

FIG. 4 shows an example of a conventional signal light 21 of this kind. When a rectangular, particularly horizontally long, signal light 21 is formed of a paraboloid of revolution reflecting mirror 22, a flat plate-like structure is formed on the lower surface of this reflecting mirror 22. resulting in a portion 22a of
The reflective treatment such as aluminum vapor deposition applied to the reflector 22 also adheres to the flat portion 22a, and when the signal light 21 is viewed during the day when it is not lit, external light is reflected on the flat portion 22a. As a result, as shown in FIG. 5, a shiny portion on the lens surface, that is, a pseudo lighting occurs.

[Problem to be solved by the invention]

The above-mentioned false lighting caused by outside light is not only unsightly, but also poses a serious problem that, for example, when the signal light 21 is a brake light, it may be mistakenly assumed that the brake system is being operated, potentially causing an accident. In order to solve this problem, the flat plate-shaped portion 22a is painted black, but masking is required to distinguish it from the reflective mirror 22, which is very time-consuming. There are problems such as a problem in which the manufacturing process is required and productivity is lowered, or a problem in which the reflecting mirror 22 is damaged during masking and the yield is reduced, and the problem has been to solve these problems.

[Means to solve the problem]

As a specific means for solving the above-mentioned problems, the present invention provides a vehicle signal light in which a flat mirror surface is formed on the lower surface of the reflector, in which the lens cut of the lens of the vehicle signal light is sequentially cut to a degree from the bottom surface. By providing a vehicle signal light characterized by superimposed prism cuts for decreasing upward refraction, the above-mentioned false lighting can be eliminated and the above-mentioned conventional problems can be solved.

【Example】

Next, the present invention will be explained in detail based on an embodiment shown in the drawings. 1 is a vehicle signal light (hereinafter abbreviated as a signal light) according to the present invention, and the reflector 2 of this signal light 1 has a flat mirror surface 2a as described in the conventional example. is formed, and naturally there is a possibility of false lighting due to the reflection of external light, but the lens 3 provided on the front surface of the reflecting mirror 2 is provided with a lens cut according to the present invention, This is intended to prevent the above-mentioned false lighting. A signal light 1 of this type is usually used, for example, as a tail light/brake light (stop-and-tail light), and the lens cut provided is divided into square sections, as shown in the figure. Here, in order to simplify the explanation and make it easier to understand, the present invention will be explained using an example in which the present invention is implemented only on the lower side of the lens 3.
b, 3c shall be attached. That is, the codes of the sections in the first row on the lowest side are all 3a, and the same lens cut is applied, and section 3
b is a section located in the second row from the bottom, and each section belonging to this section 3b has the same lens cut.
In this embodiment, it is applied to the section 3e, that is, up to the fifth row. Therefore, sections 3f and above, ie, the sixth row and above, are made of ordinary spherical fisheye lenses. FIG. 2 shows the above-mentioned lens cut setting procedure in detail using an example of the section 3a.
, a wedge-shaped prism 31 having an apex angle of θ ₁ is disposed in the lower layer so that the section 3a refracts the light vertically upward by a predetermined angle. At this time, if the prism 31a is placed over the entire section 3a,
Since a step is created between the prism 31a and the section 3b disposed in contact with the prism 31a, it is preferable to dispose an auxiliary prism 32a that is bent downward at the upper end of the prism 31a. The surfaces of the virtual prism 31a and the auxiliary prism 32a provided as described above are each covered with a convex curved surface, so that they do not look out of place in shape with the normal fisheye lens portion above the section 3f. . At this time, the curvature of the prism 31a in the horizontal direction when the signal lamp 1 is attached and the curvature of the surface of the auxiliary prism 32a in the vertical and horizontal directions are approximately the same as the curvature of the fisheye lens in the section 3f and above. The curvature of the prism 31a in the vertical direction is preferably a low curvature (see Table 1 below) so as not to impair the above-mentioned upward refraction effect. In addition, when the surfaces of the prism 31a and the auxiliary prism 32a are covered with convex curved surfaces as described above, ridges may be formed at the connection between the two surfaces, which may cause a feeling of discomfort with other parts as described above. It is preferable to continue the curved surface so that the above-mentioned ridge lines do not occur. FIG. 3 is a vertical cross section of the main part of the lens 3 constructed as described above, and the sections 3b, 3c, 3d, and 3e are formed in the same manner as the section 3a. However, the apex angles of the prisms 31b to 31e corresponding to the prism 31a are sequentially reduced, thereby sequentially reducing the angle of upward refraction, and as explained above, the sixth row is reached, and the division It is designed to be connected to the lens cut of a normal fisheye lens of 3F or higher. By doing this, prism cuts that refract light upward are superimposed on the lens cuts of sections 3a to 3e that are close to the mirror surface 2a. Here, Table 1 shows specific numerical values of the apex angle θ ₁ of the prisms 31a to 31e when the present invention is implemented in an actual specific vehicle type, and the table also includes the prisms 31a to 31e. The curvature in the vertical direction of the convex surface formed on the surface of ~31e is also shown as a radius value.

[Table] When the lens 3 configured as described above is combined with the reflecting mirror 2 and viewed under external light such as sunlight, the incident light is first refracted upward inside the signal light 1, and the mirror surface 2a The amount of light reaching the mirror surface 2a is reduced to reduce the shine of this mirror surface 2a, and at the same time, the light emitted from the mirror surface 2a through the lens 2 is refracted upward at the same portion, thereby reducing the possibility of reaching the viewer's line of sight. shall be taken as a thing. Due to the above-mentioned effects, the signal lamp 1 of the present invention does not cause false lighting even under external light. It should be noted that the above-mentioned embodiment is just an example, and for example, the number of rows to be implemented is not limited to five rows, and the location to be implemented is not limited to the lower side.In short, the degree of false lighting is sequentially reduced to positions where false lighting is likely to occur. The key point is to overlap the prisms to prevent light from being refracted in a direction other than the viewing direction, and it goes without saying that any changes can be made as long as the above conditions are satisfied.

【Effect of the invention】

As explained above, according to the present invention, a prism cut is superimposed on the lens cut of the lens, which refracts the lens upward in a decreasing degree from the bottom surface, so that external light is reflected on the mirror surface created by the rectangular reflecting mirror, which is visible to the viewer. The reflected light that reaches the line of sight and becomes a false lighting,
This prevents the light from being refracted upwards, which is out of the viewer's line of sight, and not only eliminates unsightliness, but also prevents misunderstandings, such as when a brake system has been operated, and has an outstanding effect on improving traffic safety. It is.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the main parts of an embodiment of a vehicle signal light according to the present invention, FIG. 2 is an enlarged sectional view showing the main parts of the same embodiment, and FIG.
A sectional view along the line, FIG. 4 is a perspective view showing a conventional example,
FIG. 5 is an explanatory diagram showing pseudo lighting that occurs in the conventional example. 1...Vehicle signal light, 2...Reflector, 3...Lens, 3a to 3e...Division, 31a to 31e...
Prism, 32a... Auxiliary prism, θ ₁ ... Apex angle.

Claims (1)

[Claims] 1. A vehicle signal light in which a flat mirror surface is formed on the lower surface of the reflector, characterized in that the lens cut of the lens of the vehicle signal light has a prism cut superimposed thereon that refracts the light upward in a sequentially decreasing degree from the lower surface. Signal lights for vehicles.