JPS598203A - Lamp mechanism 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 This invention relates to a vehicle lamp arrangement of a type in which the color of the light emitted by the lamp is not easily discernible when the rung is not lit. This reduces the risk, for example in bright sunlight, that the lamp arrangement appears to be on when in fact it is not.

According to the invention, a vehicle lamp assembly includes a housing having a rear portion containing a YS source and a front portion surrounded by a lens self-equipped to collimate light from the light source; The part is separated from the rear part by a Sarah filter, and the 0111 plane thereof has a step-like shape and is approximately parallel or perpendicular to the light ah of the lamp mechanism.

The color of this filter is selected so as to give the desired color in combination with the lens when the lamp is turned on.

The color of the stepped side walls is selected to give the desired evening appearance when the lamps are turned off.

The lens is a rectangular pencil Fresnel type sand; it is good, but other types can also be used.

If the desired shape of the external lens and housing is incompatible with a rotationally symmetrical collimating lens, the light-transmitting cover element is placed outside the collimating lens, and the collimating lens has a light source on its common axis. A long Fresnel prism is formed on one of the cylindrical surfaces and has the same cross section extending in each plane parallel to the common axis. , an elongated Fresnel prism having the same cross section extending in each plane perpendicular to the common axis is formed on the other of the cylindrical surfaces.

Preferably, the prism formations on the outer surface are parallel to the common axis and the prism formations on the unidirectional surface are perpendicular to the common axis.

Conventional columnar optical elements may be formed on one side of the cover element, preferably on the inner side.

According to one embodiment of the invention, the light source comprises a primary light source, such as an electric filament lamp. Other embodiments of the invention include a region on which light from a remote primary light source is focused. For example, the inventive light source is at the other focus of an ellipsoid with a primary light source located at one focus of the ellipsoid.

Embodiments of the present invention will be described below with reference to the drawings. 1st
As shown in Figures 1 and 2, the forward direction indicator lamp mechanism includes a housing having a front portion 12 and a rear cylindrical portion 10 with stepped side walls that taper from the periphery of a transparent lens 140 to the junction with the inner portion 10. Be equipped. Front part 1
The surfaces of the steps of the side walls of 2 are either parallel or perpendicular to the axis of the rear cylindrical portion 10, which axis coincides with the optical axis of the rung.

The rear cylindrical portion 10 of the housing includes a bulb holder 16 that supports a bulb 18. A rectangular pencil Fresnel type lens 14 is arranged to collimate the light from the bulb 18.

As shown in the drawings, the diameter of the rear cylindrical portion 10 of the housing is kept to the minimum required for cooling the light bulb 18, and the yellowish-brown color filter 20 having this minimum diameter is used to It is divided into two parts 10 and 12.

When the rung is lit, yellow-brown light, represented by beam 22, is emitted from the lamp mechanism. When the lamp is turned off, the incident light as shown by the ray 24 is totally reflected on the inner surface of the lens 14. Other rays, such as ray 26, which pass through the lens, are colored white and project onto the stepped side wall of the front part of the housing. As a result, such light rays return through the lens 14 and the appearance of the lamp mechanism presents a clear white color.

Another embodiment of the forward direction indicator lamp of FIGS. 3 and 4 includes a housing having a forward portion 32 with stepped sidewalls and a rear cylindrical portion 30. In the embodiment shown in FIGS. 1 and 2, the stepped surface of the side wall of the forward section 32 is parallel or perpendicular to the axis of the rear cylindrical section 30. In the embodiment shown in FIGS. This axis coincides with the optical axis of the rung. Similar to the first embodiment, the rear cylindrical portion 3
0 is a light bulb holder 34 that supports a light bulb 36 and a housing 2.
Yellow-brown filter 38 separating two sections 30 and 32
including.

The front side of the front part 32 of the housing is covered by a transparent lens 40 having conventional columnar optics on its inner surface. Located in the front part 32 of the housing between the color filter 38 and the outer lens 40 is a cylindrical intermediate element 42 of transparent plastic material, the axis of which passes through the filament of the light bulb 36. The inner surface of the intermediate element 42 near the color filter 38 is formed with an elongated Fresnel prism extending in each plane perpendicular to the axis of the cylinder, while the outer surface is formed with a Fresnel prism extending parallel to the axis.

As best shown in FIG. 1, the light rays, e.g.
is deflected by a Fresnel prism on the inner surface of 2 into a horizontal plane parallel to the optical axis of the lamp.

However, as shown in FIG. 4, this light ray still travels radially in the horizontal plane. As shown in FIG. 4, this ray is deflected by a Fresnel prism on the outer surface of the intermediate element 42 in this horizontal plane, parallel to the optical axis of the lamp. deflected to j. This parallel light beam is thus directed to the entire inner surface of the external lens 40, where it is diverged by a predetermined amount by the columnar optical element.

The invention can also be used in the lamp described in British patent specification GB-A-1016301.

The lamp housing 50 shown in FIGS. 5 and 6 includes a lens 40 and an intermediate element 42 which will not be described in detail as they correspond to the correspondingly numbered components shown in FIGS. 3 and 4.

One focal point of the ellipsoidal reflector 54 is the cylindrical intermediate element 42
The filament of the light bulb 56 is located at the other focal point. A light transmitting element 58 that is colored so that the light emitted from the lamp mechanism has the desired color when the lamp is lit.
is attached to the opaque holder 60 at the first focal point 52 . The outer surface of the holder 60 is painted in a predetermined color when the lamp is off, and in a forward direction indicator, this color is usually white.

[Brief explanation of the drawing]

FIG. 1 is line 1-1 in FIG. 2 showing a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken from line 2-2 in FIG. 1, and FIG. 3 is a cross-sectional view taken from line 3-- in FIG. 4 showing the second embodiment.
FIG. 4 is a cross-sectional view taken from line 4-4 in FIG. 3, and FIG. 5 is a cross-sectional view taken from line 5-5 in FIG. 6 showing the third embodiment. Longitudinal cross-sectional view, Figure 6 is line 6-6 in Figure 5
FIG.

Claims (1)

[Claims] 1. A rear portion (10) including a light source (18, 36, 52);
10, 50) and a housing having a front part (12, 32, 50) surrounded by a lens (14, 42) arranged to collimate the light from the light source, said rear part having a collar. A vehicle lamp arrangement separated from said front part by a filter (20, 38° 58), wherein the inner wall of said front part is stepped and these surfaces are substantially parallel or perpendicular to the optical axis of said arrangement. lamp mechanism. 2. The vehicle lamp mechanism according to claim 1, wherein the lens (14) is of a rectangular pencil Fresnel type. 3. The collimating lens (42) has coaxial cylindrical inner and outer surfaces, the light source (36, 52) is located on the common axis, and one of the cylindrical surfaces has a Elongated Fresnel prisms are formed with identical cross-sections extending parallel to said common axis, while the prisms are perpendicular to said common axis.
x An elongated Fresnel prism with an identical cross section extending in each plane is formed, and a light-transmitting cover element (40) is arranged outside the collimating lens (42). Lamp mechanism as described in section. 4. A rung mechanism according to claim 3, wherein the prism formations on the outer surface of the collimating lens (42) are parallel to the common axis and the prism formations on the inner surface are perpendicular to the common axis. 5. The lamp mechanism according to claim 3 or 4, wherein the cover element (40) has a columnar optical element on one surface. 6. A rung mechanism according to claims 1 to 5, wherein the light source comprises a region (52) on which light from a remote primary light source (56) is focused. 7. The lamp mechanism according to claim 6, wherein the light source (52) is located at one focus of an ellipsoidal reflecting mirror (54), and the -order light source is located at the other focus.