JP2502531Y2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp adapted to obtain required light distribution characteristics.

[Conventional technology]

Generally, in order to obtain the required light distribution characteristics for vehicle lighting,
The shape of the reflecting surface formed on the body side of the lamp and the shape of steps formed on the lens are variously adjusted. Conventionally, various types of lamps of this type have been proposed. For example, there is one in which light emitted from a bulb is diffused in a vertical direction on a reflecting surface and is diffused in a lateral direction in a lens. On the contrary, it is also considered that the light is diffused in the horizontal direction on the reflecting surface and is diffused in the vertical direction in the lens.

[Problems to be solved by the device]

In recent years, along with the reduction of the vehicle height of automobiles, the lamps have been made thinner with the vertical dimension being reduced. As a result, the light diffusion in the vertical direction becomes insufficient, resulting in a flat light distribution characteristic in the up and down direction, and there is a problem that the required light distribution characteristic cannot be satisfied.

An object of the present invention is to solve the above problems and to provide a vehicular lamp that enables sufficient light diffusion in the up-down direction while reducing the thickness of the lamp.

[Means for solving the problem]

In the vehicular lamp of the present invention, the reflecting surface is configured as a vertical diffusing surface that reflects light from the bulb in a state of being parallel to the left-right direction and being diffused in the up-down direction. A refraction prism that collimates the light from the bulb into parallel light is formed on the entire inner surface, and a vertical diffusion step in which a plurality of kamaboko-shaped steps extending in the horizontal direction are arranged vertically is formed on the entire outer surface of the tip surface. The outer lens is provided with left and right diffusion steps.

[Action]

According to the present invention, the reflective surface and the bulb cap diffuse vertically, and the outer lens diffuses laterally.Therefore, even in a thin lamp, the light is laterally diffused laterally by the outer lens. By the step, it is possible to irradiate a required area and obtain a light distribution characteristic that is sufficiently diffused in the vertical direction.

In particular, the valve cap is provided with a refraction type pre-bum on its inner surface to make the light from the valve parallel light and perform vertical diffusion in the vertical diffusion step, and promote vertical diffusion in the vertical diffusion step.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of the present invention,
Here, an example in which the present invention is applied to a left front turn signal lamp of an automobile having a side turn signal lamp integrally shown is shown. 2 is a left side view, and FIG. 1 is a cross-sectional view taken along the line AA of FIG. In these figures,
In this lamp, a front turn signal lamp 1 is formed on the front side portion, and a side turn signal lamp 2 is formed on a part of its side surface. That is, the lamp body 11 is formed by molding an insulating material such as resin, and the shade 12 provided in a part of the lamp body 11 defines the front turn signal lamp chamber 3 and the side turn signal lamp chamber 4. . In these lamp chambers 3 and 4, aluminum is vapor-deposited on the inner surface of the lamp body 11 to form reflecting surfaces 5 and 6, respectively. In addition, bulbs 9 and 10 are supported by sockets 7 and 8 in the lamp chambers 3 and 4, respectively, through holes formed so as to face the lamp chambers 3 and 4 of the lamp body 11. Further, an outer lens 15 having a white front turn signal lens 13 and an amber side turn signal lens 14 integrated with each other is attached to a front opening of the lamp body 11, and a peripheral portion of the outer lens 15 is attached by, for example, welding. It is firmly attached to the body 11.

In the front turn signal lamp 1, a bulb cap 16 having a substantially cylindrical container shape is covered so as to cover the bulb 9, and an opening thereof is welded to the lamp body 11. As shown in FIGS. 3 and 4, the valve cap 16 is made of amber resin, and the inner surface of the tip end surface of the valve cap 16 has a Fresnel structure refraction prism 17 for collimating the light from the bulb 9 into parallel light. And a vertical diffusion step 18 in which a plurality of laterally extending cylindrical steps (cylindrical projections) are arranged vertically is integrally formed on the outer surface of the tip end surface. Also, valve cap
A prism with a saw-tooth cross section that reflects the light from the bulb 9 to the rear is provided on a part of the side surface of the 16 facing the outside of the automobile.
19 are integrally formed.

On the other hand, the reflecting surface 5 has a paraboloidal cross-section in the left-right direction, but the vertical cross-section is a curved surface wider than the parabolic shape. It is configured as a vertical diffuse reflection surface that reflects light in a state in which light is parallel in the horizontal direction and diffused in the vertical direction.

Further, the outer lens 15 is integrally formed with a left-right diffusion step 20 in which a plurality of vertically extending cylindrical steps are arranged in the left-right direction on the inner surface of the outer lens 15, so that light passing through the outer lens 15 is diffused in the left-right direction. I am configuring.

According to this structure, as shown in FIGS. 5 (a) and 5 (b) showing the light diffusion states in the horizontal direction and the vertical direction, respectively, the refraction system prism 17 provided in the valve cap 16 radiates light from the valve 9 The light transmitted through the tip surface of the cap 16 is collimated. This eliminates the dark zone caused by the valve mounting part. Also,
The light transmitted through the tip surface of the bulb cap 16 is vertically diffused by the vertical diffusion step 18 provided on the outer surface thereof. Further, the light transmitted through the side surface of the valve cap 16 is reflected by the reflection surface 5, but since the reflection surface 5 is configured as a vertical diffuse reflection surface, the reflected light becomes light vertically diffused. The light that reaches the outer lens 15 and further passes through the outer lens 15 has a left and right diffusion step.
20 spreads left and right.

Therefore, in this lamp, the bulb cap 16 and the reflecting surface 5 sufficiently diffuse in the vertical direction, and the outer lens 15 sufficiently diffuses in the horizontal direction. As a result, it is possible to obtain the required light distribution characteristics that are sufficiently diffused vertically and horizontally regardless of the thinning of the lamp body 11.

Needless to say, the light refracted backward by the prism 19 is emitted through the side surface of the outer lens 15.

FIG. 6 shows a modification of the valve cap according to the present invention. In this embodiment, the upper surface and the lower surface of the valve cap 16A are extended and projected upward and downward, respectively, in a trapezoidal shape. Then, a refraction prism (not shown) is formed inside the front end surface of the valve cap 16A, and a semi-cylindrical vertical diffusion step 18A is formed on the outer surface. Further, a tongue piece 21 for attachment is integrally provided at the rear end of the valve cap 16A.

According to the valve cap 16A having this configuration, since the tip end surface is extended in the vertical direction, the vertical light diffusion can be more effectively performed.

[Effect of device]

As described above, according to the present invention, the reflecting surface is configured as the vertical diffusion reflecting surface, the valve cap is provided with the vertical diffusion step, and the outer lens is provided with the horizontal diffusion step. The reflective surface and the bulb cap diffuse vertically, and the outer lens diffuses laterally, so even in a thinner lamp, the required light distribution characteristics are obtained by sufficiently diffusing light vertically. There is an effect that can be.

Further, in the present invention, a refraction prism is provided on the inner surface of the valve cap, and the light from the bulb is collimated, and the light is vertically diffused by the vertical diffusion step. It is possible to prevent a so-called dark zone that appears dark from the outside, and further improve the light distribution characteristics.

[Brief description of drawings]

FIG. 1 is a transverse sectional view taken along the line AA of FIG. 2 showing an embodiment of the present invention, FIG. 2 is a left side view of the embodiment of the present invention, and FIG. 3 is an enlarged cross section of a valve cap. Fig. 4 is a perspective view schematically showing the structure of the main part, and Figs. 5 (a) and 5 (b).
Are schematic views showing light diffusion states in the left-right direction and the vertical direction, respectively, and FIG. 6 is a perspective view showing a modified example of the valve cap according to the present invention. 1 ... Front turn signal lamp, 2 ... Side turn signal lamp, 3, 4 ... Lamp room, 5, 6 ... Reflective surface, 7, 8 ...
Socket, 9,10 ... Bulb, 11 ... Lamp body, 12 ... Shade, 13 ... Front turn signal lens, 14 ... Side turn signal lens, 15 ... Outer lens, 16 ... Bulb cap, 17 ... Refractive prism, 18 ... Top / bottom Diffusion step (kamaboko-shaped protrusion), 19 ... Prism (serrated protrusion), 20
… Left and right diffusion step (kamaboko type protrusion), 16A… Valve cap.

Claims (1)

(57) [Scope of utility model registration request] 1. A vehicular lamp comprising: a bulb supported by a lamp body having a reflecting surface; a bulb cap for covering the bulb; and an outer lens mounted in an opening of the lamp body. The light from the bulb is configured as a vertical diffusion surface that is parallel to the left-right direction and is reflected in the up-down direction in a diffused state. The bulb cap makes the light from the bulb parallel to the entire inner surface of the tip end surface. A diffractive prism is formed, and a vertical diffusion step in which a plurality of laterally extending kamaboko-shaped steps are arranged in the vertical direction is provided on the entire outer surface of the tip surface, and a lateral diffusion step is provided on the outer lens. A vehicle lamp characterized by the above.