JP5773795B2 - Lamp - Google Patents

Description

  The present invention relates to a lamp used together with a vehicle headlamp.

  In addition to the headlamps, various lamps are mounted on the vehicle. In Patent Document 1, both end portions of the band-shaped buffer member of the bumper body are formed of a reflecting member made of a translucent material having a reflecting surface on the inner surface, and one end portion of the reflecting member is formed from the inside of the pan bar body. A vehicular bumper is disclosed in which a reflecting member is illuminated by irradiating and reflecting light. An irradiation device is provided inside the bumper main body so as to face each other through an irradiation window, and this irradiation device includes a lamp body and a light bulb.

Japanese Utility Model Publication No. 55-16771

  In the apparatus described in Patent Document 1, since the translucent member is exposed, mud or the like may enter the back side of the translucent member while the vehicle is running. Since the translucent member is transparent, there is a problem that mud that has entered the back side of the translucent member is observed from the front of the vehicle and the appearance is deteriorated.

  The present invention has been made in view of such a situation, and the purpose thereof is a technique that does not reduce the appearance even when mud or the like enters the back side of the light guide in a lamp provided with the light guide disposed in an exposed manner. Is to provide.

  An embodiment of the present invention is a lamp that is disposed outside an outer lens of a vehicle headlamp. The lamp includes an elongated light guide, a light source that emits light inside the light guide, and a terminal portion in which a hollow portion having an opening on the vehicle rear side is formed. Opaque coating is applied to the surface of the light guide on the vehicle rear side, the light guide and the end portion are integrally molded, the light source is disposed in the hollow portion, and the opening is sealed.

  According to this aspect, since the opaque coating is applied to the rear surface of the light guide, even if mud or the like enters the back side of the light guide, it is not observed from the front of the vehicle and looks good. It doesn't get worse. Moreover, since the light guide and the end portion in which the light source is disposed are integrally molded, the number of parts can be reduced.

  The end portion further includes a lens formed in front of the hollow portion, and a second light source disposed between the lens and the hollow portion, and the lens forms a predetermined light distribution when the second light source is turned on. May be.

  According to the present invention, in a lamp provided with a light guide, even if mud or the like enters the back side of the light guide, the appearance does not deteriorate.

It is a front view of the lamp which concerns on one Embodiment of this invention. It is sectional drawing along the BB line of FIG. It is sectional drawing along the CC line of FIG.

  FIG. 1 is a front view of a clearance lamp 40 that is a lamp according to an embodiment of the present invention.

  The clearance lamp 40 is disposed adjacent to the headlamp, and is for notifying other vehicles and pedestrians of the presence of the host vehicle when the headlamp is not lit. The clearance lamp 40 includes an elongated light guide 42 and a terminal portion 44 located at the lower end of the light guide 42. Both the light guide 42 and the end portion 44 are made of a transparent synthetic resin, and are preferably integrally molded.

  As will be described later, the clearance lamp 40 uses a semiconductor light emitting element such as a white LED disposed in the end portion 44 as a light source. Since the intensity of the light guide in the light guide 42 becomes weaker as it goes to the tip side where the optical path length becomes longer, the light from the semiconductor light emitting element is incident from the end side (left side in FIG. 1) of the light guide 42. It is formed so that its width gradually decreases and its thickness becomes thinner toward the tip end side (right side in FIG. 1). Thereby, the illuminance from the end to the end of the light guide 42 is made substantially uniform.

  The light guide 42 and the end portion 44 of the clearance lamp 40 do not have a cover on the front surface, and are attached to the front portion of the vehicle in a state of being exposed to the external environment. Since it is not necessary to arrange the clearance lamp 40 inside the cover, the degree of freedom in the assembly order of the clearance lamp 40 is increased.

  2 is a cross-sectional view of the end portion 44 taken along the line B-B in FIG. 1, and FIG. 3 is a cross-sectional view of the light guide 42 taken along the line C-C in FIG. 1.

  As shown in FIG. 2, the end portion 44 is formed with a hollow portion 48 having an opening on the vehicle rear side. The hollow portion 48 is sealed with a cap 50 to prevent intrusion into the inside of water or soil. A convex lens 46 is formed on the vehicle front side of the hollow portion 48. The convex lens 46 is adjusted so that a predetermined light distribution as a clearance lamp is formed.

  In the hollow portion 48, two light receiving portions 52 and 54 are formed in order to guide the emitted light from the light emitting elements 62 and 64 into the convex lens or the light guide. The light receiving portion 52 formed on the upper surface of the hollow portion 48 guides light emitted from the light emitting element 62 disposed adjacent to the light receiving portion 52 into the convex lens 46. The light receiving portion 54 formed on the side wall of the hollow portion 48 on the light guide 42 side is formed in a convex shape. The light emitted from the light emitting element 64 disposed adjacent to the light receiving portion 54 is refracted so as to be condensed and guided into the light guide, whereby the light from the light emitting element 64 can be used effectively.

  As shown in FIG. 3, the upper surface of the light guide 42, that is, the vehicle front side, is formed in an arc shape over the entire length in the longitudinal direction. On the upper surface of the light guide 42, a step or a texture 66 for emitting light inside the light guide 42 may be formed. Of the cross section of the light guide 42, the bottom surface, that is, the vehicle rear side, is formed flat over the entire length in the longitudinal direction.

  As described above, the clearance lamp 40 of this embodiment does not include a cover on the vehicle front side. Therefore, there is a possibility that water droplets, mud, or the like may enter between the back side of the light guide 42, that is, the bottom surface of the light guide 42 and the extension 36 while the vehicle is traveling. If water droplets are deposited on the back side of the light guide 42, the refractive index of light traveling inside the light guide changes, which may cause uneven light distribution. Further, if mud enters the back side of the light guide 42, the light guide is transparent, so that the mud can be seen when viewed from the front of the vehicle, and the appearance is poor.

  Therefore, in this embodiment, an opaque coating 70 is applied to the flat bottom surface of the light guide 42. By this coating, even when water droplets, mud, or the like enters the back side of the light guide 42, it is possible to prevent the occurrence of uneven light distribution and the deterioration of the appearance. Moreover, since the light guide 42 shines in the color of the paint 70 when the clearance lamp emits light, the appearance can be enhanced.

  The coating 70 is formed of, for example, a silver coating film, but there is no limitation on the material and the forming method as long as light is not transmitted. The coating 70 may be similarly applied to the end portion 44 and the bottom surface of the cap 50.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. The configuration shown in each figure is for explaining an example, and any configuration that can achieve the same function can be changed as appropriate, and the same effect can be obtained. In addition to the clearance lamp, the present invention can be applied to various installation places and types of lamps such as a front turn signal lamp, a tail lamp installed behind the vehicle, and a stop lamp.

  40 Clearance Lamp, 42 Light Guide, 44 Terminal, 46 Convex Lens, 48 Hollow, 50 Cap, 52, 54 Light Receiving Unit, 62, 64 Light Emitting Element, 70 Paint, 100 Lamp Unit.

Claims (4)

An elongated light guide,
A light source that emits light into the light guide;
An end portion formed with a hollow portion having an opening on the vehicle rear side,
Opaque coating is applied to the vehicle rear side surface of the light guide,
The light guide and the end portion are integrally molded,
The light source is disposed in the hollow portion, and the opening is sealed ;
A lamp having a step for reflecting light inside the light guide formed on a rear surface of the light guide, and the coating applied behind the step . The end portion further includes a lens formed in front of the hollow portion, and a second light source disposed between the lens and the hollow portion,
The lamp according to claim 1, wherein the lens forms a predetermined light distribution when the second light source is turned on. 3. The lamp according to claim 1, wherein a convex light-receiving portion that condenses light emitted from the light source is formed on a side wall of the hollow portion on a light guide body side. The lamp according to any one of claims 1 to 3, wherein the coating is also applied to a bottom surface of the end portion.

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