JP2000100223A - Outer lens of vehicular lamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the generation of glaring light by forming the design lines of a synthetic resin-made and transparent outer lens which is installed on the opening of a housing having a vehicular lamp bulb built in and has the design lines along the horizontal direction on its inside surface into groove parts recessed in the inside surface of the outer lens. SOLUTION: This outer lens 3 to be installed on the front opening of a lamp device is made of a synthetic resin (polycarbonate) and its outside surface 3a and inside surface 3b each are a smooth and transparent type (non-diffusion type). Multiple groove parts 6 as design lines are each formed on the inside surface 3b of the outer lens 3 along the horizontal direction. The groove parts 6 are formed in order to allow the pressure of the outer lens 3 itself to be easily confirmed and to make the internal structure of the lamp device hard to see. Light L irradiated horizontally from a bulb and entered into the groove parts 6 is irradiated outside generally kept in the horizontal form, and the light L is not refracted upward, so that the light L hardly becomes dazzlingly and glitteringly glaring light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer lens of a vehicle lamp device, and more particularly to an outer lens of a vehicle lamp device capable of suppressing generation of glare light.

[0002]

2. Description of the Related Art As an outer lens provided in an opening of a housing containing a bulb of a vehicle lamp, there is a transparent type (non-diffusion type) formed of a transparent synthetic resin.
In the case of this type of outer lens, a plurality of design lines are formed on the inner surface of the outer lens because the presence of the outer lens itself is difficult to understand and the internal structure of the lamp device is too visible when provided in the opening of the housing. are doing. The formation of the design line makes it easy to confirm the existence of the outer lens itself and makes it difficult to see the inside of the lamp device. Conventionally, this design line is formed by a rib projecting from the inner surface of the outer lens, and is formed in a horizontal direction with respect to the inner surface of the outer lens.
Some are formed vertically.

[0003]

However, in such a conventional technique, the design line is formed in the horizontal direction because the design line is a rib projecting from the inner surface of the outer lens. The light may be refracted upward by the ribs, resulting in glare and glare. Therefore, a proposal for a design line replacing such a rib is desired.

The present invention has been made by paying attention to such a conventional technique, and provides an outer lens of a vehicle lamp device capable of suppressing generation of glare light.

[0005]

According to the first aspect of the present invention,
An outer lens made of synthetic resin and provided with a design line extending in a horizontal direction on an inner surface thereof, which is provided in an opening of a housing containing a bulb of a vehicle lamp, wherein the design line is recessed in an inner surface of the outer lens. This is the groove that has been formed. The design line may be formed continuously in the horizontal direction or may be formed intermittently.

According to the first aspect of the present invention, since the design line is a groove recessed in the inner surface of the outer lens, light is unlikely to be refracted upward, and generation of glare light can be suppressed.

[0007] In the invention described in claim 2, the groove is formed so as to be recessed at an angle upward with respect to the horizontal from the inner surface of the outer lens.

According to the second aspect of the present invention, since the groove is recessed at an angle upward with respect to the horizontal from the inner surface of the outer lens, light having entered the groove is refracted downward by the bottom surface of the groove. It is hard to be glare light.

In the invention according to claim 3, the groove is formed by laser processing.

According to the third aspect of the present invention, since the groove is formed by laser processing, the width, angle, and depth of the groove can be easily changed as compared with the case where the groove is formed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of the present invention. Reference numeral 1 denotes a lamp device as a headlamp, and the lamp device 1 is installed at a front portion of an automobile. An outer lens 3 is provided in a front opening 2 a of a housing 2 of the lamp device 1. A reflector 4 is provided in the housing 2, and a valve 5 fixed to a back wall of the housing 2 is provided at a central portion of the reflector 4, and light L from the bulb 5 is transmitted to an inner surface of the reflector 4. And is radiated from the outer lens 3 to the outside.

The outer lens 3 is made of a transparent synthetic resin (polycarbonate), and may be a transparent type (non-diffusion type) in which the outer surface 3a and the inner surface 3b are smooth. The outer lens 3 itself is injection-molded by a mold. Then, on the inner surface 3b of the outer lens 3,
A plurality of grooves 6 as “design lines” are respectively formed along the horizontal direction. The groove 6 is formed to make it easier to confirm the existence of the outer lens 3 itself and to make the internal structure of the lamp device 1 difficult to see.

The grooves 6 are formed by irradiating the inner surface 3b of the outer lens 3 with a laser beam after the outer lens 3 is formed. In the first embodiment, the groove 6 is formed along the horizontal direction. Therefore, the light L emitted from the bulb 5 in the horizontal direction and entering the groove 6 is generally emitted to the outside in the horizontal state. As described above, since the light L is not refracted upward from the bulb 5, it is difficult for the light L to become glare glare light. Further, since the groove 6 is formed by laser processing, the width of the groove 6 can be reduced, and the width, angle, and depth can be easily changed as compared with a case where the groove 6 is formed by a mold. is there.

FIG. 3 is a diagram showing a second embodiment of the present invention. In the second embodiment, the groove 7 is recessed from the inner surface 3b of the outer lens 3 at a predetermined upward angle θ with respect to the horizontal. Therefore, the light L that has entered the groove 7 is refracted downward by the bottom surface 7a of the groove 7, so that the light L is less likely to become glare light. In addition, such an oblique groove 7 can be easily formed because it is laser-processed.

In each of the above embodiments, the headlamp installed at the front portion of the vehicle body is described as the lamp device 1. However, the present invention is not limited to this, and other lamp devices may be used. An installed lamp device may be used.

[0017]

According to the first aspect of the present invention, since the design line is a groove recessed in the inner surface of the outer lens, light is unlikely to be refracted upward, and generation of glare light can be suppressed.

According to the second aspect of the present invention, since the groove is recessed at an angle upward with respect to the horizontal from the inner surface of the outer lens, light that has entered the groove is refracted downward by the bottom surface of the groove. Difficult to glare.

According to the third aspect of the present invention, since the groove is formed by laser processing, the width, angle and depth of the groove can be easily changed as compared with the case where the groove is formed.

[Brief description of the drawings]

FIG. 1 is a front view of a lamp device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the outer lens taken along line SA-SA shown in FIG.

FIG. 3 is a sectional view of an outer lens according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp apparatus 2 Housing 2a Opening 3 Outer lens 3a Outer surface 3b Inner surface 4 Reflector 5 Bulb 6, 7 Groove (design line) 7a Bottom L Light θ Upward angle

Claims (3)

[Claims] 1. An outer lens made of synthetic resin and provided with a design line extending in a horizontal direction on an inner surface thereof, provided in an opening of a housing containing a bulb of a vehicle lamp, wherein the design line is an outer lens. An outer lens for a vehicle lamp device, wherein the outer lens is a groove formed in the inner surface of the vehicle lamp. 2. The outer lamp of the vehicle lamp device according to claim 1, wherein the groove is recessed from an inner surface of the outer lens at an angle upward with respect to the horizontal. Outer lens. 3. The outer lens of the vehicle lamp device according to claim 1, wherein the groove is formed by laser processing.