JPH0134810Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention eliminates the non-reflective part that is formed on the inner surface of the lamp body and is visible as a dark part from the front direction, and uniformly illuminates the entire front lens to improve visibility. The present invention relates to a structure of a vehicle lamp with improved characteristics.

BACKGROUND TECHNOLOGY In general, lights installed in vehicles such as automobiles are
A lamp body 11 whose inner surface is a smooth paraboloid and a reflective surface is formed by coating the entire surface with reflective paint or vacuum-depositing aluminum.
and a front lens 12 that covers the front opening thereof are adhesively fixed at their peripheral portions. In recent years, in a vehicle lamp having a parabolic reflecting surface, the lens surface of the front lens 12 has been bent and extended so as to go around to the side of the vehicle in accordance with the external design of the vehicle itself. A light bulb has been proposed in which the light can be illuminated simultaneously to the front and sides of the lamp chamber by means of a lighting bulb disposed inside the lamp chamber (see FIG. 3).

Problems that the invention attempts to solve However, the light body 1 of such a vehicle light
1, it is necessary to set the die cutting direction X in an oblique direction due to design conditions of the lamp configuration, taking into consideration the irradiation direction of the reflected light beam refracted by the reflective surface formed on the inner surface of the lamp body 11; As a result, a substantially planar wall portion B that is continuous with the parabolic reflecting surface A is formed on the inner surface of the lamp body 11, and this appears as a dark portion Y when viewed from the front through the front lens 12 during lighting. In order to eliminate such a dark area Y, it is sufficient to avoid forming the wall part B within the lamp body 11, but in order to form this part as a paraboloid, a so-called sliding type is required, and This may cause an increase in the cost of the lamp itself.

This idea was devised in view of the above problem, and the lamp body 11 when viewed from the front without using a special mold such as a slide type.
(hereinafter simply referred to as "non-reflective part")
is excluded.

Means for solving the problems The means for solving the problems described above will be explained using FIGS. 1 and 2 corresponding to the embodiments.
It is formed continuously with the paraboloid A on the inner surface of the molded upper lamp body 1, and in the conventional example, the front lens 1 is
2, a step groove group having a substantially semicircular cross section is carved on substantially the entire surface of the substantially planar wall portion B, which appears as a dark portion Y in the front direction, and other non-reflective portions of the structure. ing.

Function: The step groove 6, which is carved on substantially the entire surface of the structure, receives the light from the bulb 4 during lighting and scatters and reflects the light Z, and irradiates the front lens 2 substantially uniformly. To prevent the occurrence of a dark portion Y on the front lens 2.

Embodiment A preferred embodiment of this invention will be described below with reference to the drawings.

In the drawings, 1 is a lamp body, and 2 is a front lens that covers the front opening of the lamp body 1. The lamp body 1 has a parabolic reflective surface A formed on its inner surface, and an annular groove 3 formed around the periphery of the front opening.In this embodiment, the shape of the front lens 2 side is And the mold removal direction It is formed so as to be biased toward the side surface side S rather than the front side F, which is the direction. Therefore, in the side S direction of the lamp body 1, the part joined to the peripheral wall 5 of the front lens 2 is formed to protrude compared to other parts, and a paraboloid is formed in this protruding part continuously with the reflective surface A. A substantially planar dark area B is formed that does not become . In the present invention, a step groove 6 is formed on substantially the entire surface of this wall portion B along the die cutting direction X, and is made up of a large number of protrusions having a substantially semicircular cross section.

On the other hand, the front lens 2 is formed by bending the front lens surface and the following side surfaces so as to go around the sides of the vehicle, and the peripheral wall 5 is formed around the entire periphery of this lens surface. There is. Thus, when the front lens 2 is installed in a mounting position in which the light emitting axis of the bulb 4 disposed in the lamp body 1 is shifted toward the side surface of the front lens 2, the tip of the peripheral wall 5 is aligned with the annular groove 3 of the lamp body 1. By being fitted into and fixed to the lamp body 1, it is fixed integrally with the lamp body 1 and covers the front opening thereof.

Although the present invention is extremely effective in eliminating the occurrence of the dark area Y due to the wall portion B as in the above embodiment, the non-reflective portion formed on the inner surface of the lamp body 1 is limited to the wall portion B only. Not yet. For example, on the inside of the lamp body 1, a plurality of bosses (not shown) are protruded from the front lens 2 side into which fixing screws for tightening and fixing the front lens to the lamp body 1 side are inserted. This boss portion may become a non-reflective portion and cause a dark portion on the front lens 2. The present invention can also be configured as a means for eliminating the occurrence of dark areas due to such boss portions.

Effects of the Device As explained above, this device has a plurality of substantially half halves arranged in parallel along the mold cutting direction on substantially the entire surface of walls and other structures formed on the inner surface of the lamp body when the lamp body is formed. By simply carving a circular step groove, it is possible to prevent dark areas from forming on the front lens and improve visibility when the lens is lit. Further, since there is no need to use a special mold such as a slide mold, there is no need to increase the cost of the vehicle lamp, and practical effects such as being advantageous in terms of cost can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the vehicle lamp according to this invention, Fig. 2 is a partially enlarged perspective view showing the structure of the wall portion, and Fig. 3 is a cross-sectional view showing an example of the conventional vehicular lamp. It is a diagram. 1...Lighting body, 2...Front lens, 3...
Annular groove, 4...valve, 6...step groove.

Claims (1)

[Scope of utility model registration request] On the inner surface of the lamp body, approximately the entire surface of a substantially planar wall or other structure that is continuous with the parabolic reflecting surface and is formed as a non-reflective portion facing the front direction, is coated in the direction of mold removal. 1. A vehicle lamp characterized in that a plurality of step grooves having substantially semicircular cross-sections are carved in parallel along the length of the vehicle.