JP2013178978A - Vehicle lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a non-luminous part without increasing the number of components.SOLUTION: A vehicle lamp 1 is provided with a bulb 2 and an inner lens 3 arranged frontward of the bulb 2. The inner lens 3 includes a light-transmitting part 32 for transmitting light emitted from the bulb 2 forward and a non-transmitting part 31 not transmitting the light emitted from the bulb 2. On a front face of the non-transmitting part 31, there are formed a plurality of cuts 310, ... for reflexively reflecting backward from a rear face the light which is emitted from the bulb 2 and is made incident into the non-transmitting part 31.

Description

  The present invention relates to a vehicular lamp.

  2. Description of the Related Art Conventionally, a vehicular lamp mounted on a vehicle is known in which a non-light emitting portion is provided on a part of a lens disposed in front of a light source for the purpose of causing the light emitting portion to emit light in a desired shape. In general, in this type of vehicular lamp, by covering a part of the lens with a light shielding member, the lens part excluding the part is made into a desired shape while the part is a non-light emitting part (non-light transmitting part), Light from the light source is transmitted through the lens portion to emit light in a desired shape (see, for example, Patent Document 1).

Utility Model Registration No. 2579622

  However, the conventional vehicle lamp has a problem in that the number of parts increases because it is necessary to use a light shielding member that is a separate part from the lens.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the vehicle lamp which can form a non-light-emitting part, without increasing a number of parts.

In order to solve the above-mentioned problem, the invention described in claim 1
A light source and a lens disposed in front of the light source;
In a vehicle lamp comprising:
The lens includes a translucent part that transmits light emitted from the light source forward and a non-translucent part that does not transmit light emitted from the light source.
The front surface of the non-light-transmitting portion is formed with a plurality of cuts for retroreflecting light emitted from the light source and incident on the non-light-transmitting portion from the rear surface.

The invention according to claim 2 is the vehicle lamp according to claim 1,
A reflection surface is provided behind the lens and reflects the light reflected backward by the plurality of cuts of the non-translucent portion toward the translucent portion.

  According to the first aspect of the present invention, the light emitted forward from the light source and incident from the rear surface to the non-translucent portion of the lens is moved backward by the plurality of cuts formed on the front surface of the non-translucent portion. Retroreflected. Thereby, it is possible to prevent light emitted from the light source from being transmitted through the non-translucent portion of the lens by using only the lens without using a light shielding member that is a separate component from the lens. The portion can be a non-light emitting portion that does not emit light when viewed from the front. Therefore, the non-light emitting portion can be formed without increasing the number of parts.

  According to the second aspect of the present invention, the light reflected backward by the plurality of cuts of the non-light-transmitting portion of the lens is reflected toward the light-transmitting portion of the lens by the reflecting surface disposed behind the lens. Then, the light is transmitted through the light-transmitting portion and forward. In other words, unlike the conventional case where the light going to the non-light emitting portion is only shielded by the light shielding member, the light incident on the non-light transmitting portion (that is, the non-light emitting portion) is used as light for emitting the light transmitting portion forward. Is done. Therefore, the luminous flux utilization factor can be improved as compared with the conventional case.

It is a front view of the important section of the vehicular lamp in an embodiment. It is sectional drawing in the II-II line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a main part of a vehicular lamp 1 in the present embodiment, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” refer to the direction viewed from the vehicular lamp 1 unless otherwise specified. .

As shown in FIGS. 1 and 2, the vehicular lamp 1 includes a bulb 2, an inner lens 3, and a reflector 4 in a lamp chamber whose front is covered with an outer lens (not shown).
Among these, the bulb 2 is a light source according to the present invention, and has a filament 21 that is a light emitter. The valve 2 is fixed to the reflector 4 while being inserted from behind into a valve mounting hole 41 formed in the center of the bottom of the reflector 4.

The inner lens 3 is a lens according to the present invention, is formed in a substantially flat plate shape orthogonal to the front-rear direction, and is disposed so as to cover the front of the bulb 2 and the reflector 4.
In the inner lens 3, a portion extending from the front center portion to the left end portion located in front of the bulb 2 is a non-translucent portion 31 that does not transmit light emitted from the bulb 2. A plurality of cuts 310 are formed on the front surface of the non-light-transmitting portion 31 to retroreflect the light emitted from the bulb 2 and incident on the non-light-transmitting portion 31 from the rear surface to the rear by total reflection. The plurality of cuts 310,... Are conventionally known prism cuts formed in the same manner as that of a reflector material (reflex reflector) provided in a tail lamp of an automobile.
On the other hand, in the inner lens 3, a U-shaped portion in front view surrounding the periphery of the non-light-transmitting portion 31 is a light-transmitting portion 32 that transmits light emitted from the bulb 2 forward. A plurality of lens cuts 320 are formed on the rear surface of the light transmitting portion 32 to diffuse light transmitted through the light transmitting portion 32 in the vertical direction or the horizontal direction.

The reflector 4 is formed in a shape that opens forward, and the peripheral edge of the inner lens 3 is supported by the peripheral edge of the opening. The bottom surface of the reflector 4 is a reflecting surface 42 on which an aluminum coating is deposited.
Of the reflecting surface 42, the first reflecting region 42a located behind the non-light transmitting portion 31 of the inner lens 3 is mainly light reflected backward by the non-light transmitting portion 31 of the inner lens 3, that is, The light that is reflected backward by the plurality of cuts 310 of the non-light-transmitting portion 31 and that travels backward from the non-light-transmitting portion 31 is reflected toward the light-transmitting portion 32 of the inner lens 3.
On the other hand, the second reflection area 42b of the reflection surface 42 excluding the first reflection area 42a is reflected by the light reflected back by the non-light transmitting portion 31 of the inner lens 3 or the second reflection from the filament 21 of the bulb 2. The light directly incident on the region 42 b is reflected toward the light transmitting part 32 of the inner lens 3.

  According to the vehicle lamp 1 described above, a plurality of light beams emitted forward from the bulb 2 and incident on the non-light-transmitting portion 31 of the inner lens 3 from the rear surface are formed on the front surface of the non-light-transmitting portion 31. It is retroreflected backward by the cuts 310,. Thereby, it is possible to prevent the light emitted from the bulb 2 from being transmitted through the non-light transmitting portion 31 of the inner lens 3 by using only the inner lens 3 without using a light shielding member that is a separate component from the inner lens 3. As a result, the non-light-transmitting portion 31 of the inner lens 3 can be a non-light-emitting portion that does not emit light when viewed from the front. Therefore, the non-light emitting portion can be formed without increasing the number of parts.

  Further, the light reflected backward by the plurality of cuts 310 of the non-light-transmitting portion 31 of the inner lens 3 is reflected by the reflecting surface 42 of the reflector 4 disposed behind the inner lens 3. The light is reflected toward 32, is transmitted through the light transmitting part 32, and is irradiated forward. That is, unlike the conventional case where the light traveling toward the non-light emitting portion is blocked by the light shielding member, the light incident on the non-light transmitting portion 31 (that is, the non-light emitting portion) causes the light transmitting portion 32 to emit light forward. Used as Therefore, the luminous flux utilization factor can be improved as compared with the conventional case.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above embodiment, the bulb 2 having the filament 21 is provided as the light source of the vehicular lamp 1. However, the light source according to the present invention is not limited to the bulb having the filament, and has a filament. There may be no discharge bulb or a light emitting element such as an LED (light emitting diode).

  Moreover, the shape and position of the non-light-transmissive part 31 in the inner lens 3 are not limited to those of the above-described embodiment, and can be arbitrarily set. Therefore, by setting the shape and position of the non-light-transmitting portion 31 corresponding to the desired shape of the light-transmitting portion 32 (that is, the light-emitting portion), the light-transmitting portion 32 can emit light in a desired shape.

1 Vehicle lamp 2 Bulb (light source)
21 Filament 3 Inner lens (lens)
31 Non-translucent portion 310 Cut 32 Translucent portion 320 Lens cut 4 Reflector 41 Valve mounting hole 42 Reflecting surface 42a First reflecting region 42b Second reflecting region

Claims (2)

A light source and a lens disposed in front of the light source;
In a vehicle lamp comprising:
The lens includes a translucent part that transmits light emitted from the light source forward and a non-translucent part that does not transmit light emitted from the light source.
A vehicular lamp characterized in that a plurality of cuts are formed on the front surface of the non-light-transmitting portion to retroreflect light rearwardly emitted from the light source and incident on the non-light-transmitting portion from the rear surface.   The reflective surface which is arrange | positioned in the back of the said lens and reflects the light reflected back by the said some cut of the said non-light-transmissive part toward the said light-transmissive part is characterized by the above-mentioned. Vehicle lamp.

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