JP2013246912A - Vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a transparent lens widely emit light up to a peripheral edge part without any limit on its shape.SOLUTION: A vehicular lamp 1 is provided with a first light source 4, a housing 2 formed in a shape opened forward and storing the first light source 4 inside, and an outer lens 3 closing an opening of the housing 2. The housing 2 is made of a transparent material, and the housing 2 and the outer lens 3 are jointed to each other in a front-to-rear direction at each other's peripheral edge part so as its joint surface F1 to be transparent. An outer side-surface of the peripheral edge part of the housing 2 is to be an auxiliary reflecting surface 2b for letting light which is emitted from the first light source 4 and incident from an inner side-surface into the peripheral edge part internally reflected forward in a direction of the joint surface F1.

Description

  The present invention relates to a vehicular lamp.

  In various types of vehicle lamps mounted on a vehicle, generally, a housing member (for example, a housing or a reflector) that houses a light source is formed in a shape that opens forward, and the opening of the housing member is transparent. It is blocked by the lens. In such a vehicular lamp, since the housing member and the translucent lens are joined to each other at the peripheral portion, the joint portion blocks light from the light source, and the translucent lens extends to the peripheral portion. It was not possible to emit light widely.

  Therefore, for example, in the vehicular lamp described in Patent Document 1, a light source is disposed inside a translucent lens having a shape that opens rearward, whereby the joint portion is connected to the front surface (light exit surface) of the translucent lens. The light distribution is controlled such that the front surface of the translucent lens emits light widely up to the peripheral portion, excluding the peripheral portion.

JP 2005-276644 A

  However, in the vehicular lamp described in Patent Document 1, the shape of the translucent lens is limited to the shape that opens rearward, and therefore the shape and structure of the entire lamp including the support member of the translucent lens is inevitably required. The use of the vehicular lamp will be limited.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the vehicle lamp which can light-emit a translucent lens widely to a peripheral part, without restrict | limiting the shape of a translucent lens.

In order to solve the above problems, the present invention provides:
A light source;
A storage member that is formed in a shape that opens forward, and that stores the light source therein,
A translucent lens for closing the opening of the housing member;
In a vehicle lamp comprising:
The housing member is made of a translucent material,
The housing member and the translucent lens are joined in the front-rear direction at the periphery of each other so that the joint surface thereof is translucent,
The outer surface of the peripheral portion of the housing member is configured to internally reflect light emitted from the light source and incident on the peripheral portion from the inner surface toward the joint surface.

  According to the present invention, the housing member that houses the light source is made of a translucent material, and the joint surface at the peripheral portion of the housing member and the translucent lens that closes the opening of the housing member is formed to be translucent. The outer surface of the peripheral portion of the housing member is internally reflected by the light emitted from the light source and incident on the peripheral surface from the inner surface toward the bonding surface, so that the light is emitted from the light source to the peripheral portion of the housing member. The light incident from the inner surface is internally reflected forward by the outer surface of the peripheral portion and transmitted through the joint surface, and is then irradiated forward of the lamp through the peripheral portion of the translucent lens. Therefore, unlike the prior art, the translucent lens can emit a wide range of light up to the periphery where the joint surface is formed without limiting the shape of the translucent lens to the rear opening.

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

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a front view of a vehicular lamp 1 according to the present embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. 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 to 3, the vehicular lamp 1 includes a housing 2 formed in a shape that opens forward, and a transparent outer lens 3 that closes the opening of the housing 2. The housing 2 and the outer lens 3 are joined over the entire circumference at the peripheral edge of each other. Specifically, the front surface of the opening periphery of the housing 2 and the rear surface of the projecting portion 31 projecting rearward from the peripheral portion of the outer lens 3 are joined in the front-rear direction by welding to form a joining surface F1. Has been.

  Here, not only the outer lens 3 but also the housing 2 is formed of a translucent material (resin). Therefore, the bonding surface F1 on which these are welded is a light-transmitting surface. Examples of the type of welding for forming the bonding surface F1 include laser welding, vibration welding, and thermal welding, but are not particularly limited as long as the bonding surface F1 can be formed on a translucent surface.

  A portion of the inner surface of the housing 2 that is a substantially lower half portion excluding the peripheral edge portion is a light distribution reflecting surface 2a on which an aluminum coating is deposited. The light distribution reflecting surface 2a is formed, for example, in the shape of a paraboloid, reflects light emitted from a first light source 4 to be described later, and irradiates the lamp forward through the outer lens 3. A predetermined light distribution pattern is formed in front.

  The outer surface of the peripheral edge of the housing 2 is an auxiliary reflecting surface 2b on which an aluminum coating is deposited. The auxiliary reflection surface 2b internally reflects light emitted from a first light source 4 described later and incident on the peripheral edge of the housing 2 from the inner surface toward the bonding surface F1.

A first light source 4, a second light source 5, a reflector 6, and an inner lens 7 are accommodated in a lamp chamber formed by the housing 2 and the outer lens 3.
Among these, the 1st light source 4 is arrange | positioned in the focus vicinity of the reflective surface 2a for light distribution, and emits light mainly toward the reflective surface 2a for light distribution.

On the other hand, the second light source 5, the reflector 6 and the inner lens 7 are arranged above the light distribution reflecting surface 2a to constitute one lamp unit. Specifically, as shown in FIG. 3, an inner lens 7 is provided so as to close the opening of the reflector 6 formed in a shape that opens forward, and is formed by the reflector 6 and the inner lens 7. A second light source 5 is accommodated in the lamp chamber.
Among these, the 2nd light source 5 is arrange | positioned in the focus vicinity of the reflective surface 6a for light distribution of the reflector 6 mentioned later, and mainly radiate | emits light toward the reflective surface 6a for light distribution.

  The reflector 6 and the inner lens 7 are joined over the entire circumference at the periphery of each other. Specifically, the front surface of the opening periphery of the reflector 6 and the rear surface of the projecting portion 71 projecting rearward from the periphery of the inner lens 7 are joined in the front-rear direction by welding to form a joining surface F2. Has been.

  Here, not only the inner lens 7 but also the reflector 6 is formed of a translucent material (resin). Therefore, the joint surface F2 to which these are welded is a surface that can transmit light. Examples of the type of welding for forming the bonding surface F2 include laser welding, vibration welding, thermal welding, and the like, but are not particularly limited as long as the bonding surface F2 can be formed on a translucent surface.

  A portion of the inner surface of the reflector 6 excluding the peripheral portion is a light distribution reflecting surface 6a on which an aluminum coating is deposited. The light distribution reflecting surface 6a is formed, for example, in the shape of a paraboloid, reflects light emitted from the second light source 5 forward, and irradiates the lamp forward through the inner lens 7 and the outer lens 3. A predetermined light distribution pattern is formed in front of the lamp.

  The outer surface of the peripheral edge of the reflector 6 is an auxiliary reflecting surface 6b on which an aluminum coating is deposited. The auxiliary reflection surface 6b internally reflects light emitted from the second light source 5 and incident on the peripheral edge of the reflector 6 from the inner surface toward the bonding surface F2.

In the vehicular lamp having the above configuration, as shown in FIG. 2, among the light emitted from the first light source 4, the light emitted to the light distribution reflecting surface 2 a of the housing 2 is used for the light distribution. The light is reflected forward by the reflecting surface 2a and irradiated to the front of the lamp through the substantially lower half of the outer lens 3 other than the peripheral edge.
On the other hand, of the light emitted from the first light source 4, the light emitted to the peripheral portion of the housing 2 is incident on the peripheral portion from the inner side surface, and is internally reflected forward by the auxiliary reflecting surface 2 b and joined. After passing through F1, it is irradiated forward of the lamp through the peripheral edge of the outer lens 3. However, the reflector 6 and the inner lens 7 are disposed above the first light source 4, and light from the first light source 4 is difficult to enter the substantially upper half of the peripheral edge of the housing 2. Therefore, the outer peripheral portion of the outer lens 3 that irradiates light forward of the lamp is only the substantially lower half portion.

Also, as shown in FIG. 3, among the light emitted from the second light source 5, the light emitted to the light distribution reflecting surface 6a of the reflector 6 is reflected forward by the light distribution reflecting surface 6a. After passing through other than the peripheral edge of the inner lens 7, it is irradiated forward of the lamp through the outer lens 3.
On the other hand, of the light emitted from the second light source 5, the light emitted to the peripheral portion of the reflector 6 enters the peripheral portion from the inner side surface, and is internally reflected forward by the auxiliary reflecting surface 6 b and joined. After passing through F2, it is irradiated forward of the lamp through the peripheral edge of the inner lens 7 and the outer lens 3.

  As described above, according to the vehicular lamp 1, the light emitted from the first light source 4 and incident on the peripheral edge of the housing 2 from the inner surface is internally reflected forward by the auxiliary reflecting surface 2 b and passes through the joint surface F <b> 1. After passing through, it is irradiated forward of the lamp through the peripheral edge of the outer lens 3. Therefore, unlike the conventional case, the outer lens 3 can emit light widely over the peripheral edge portion where the joint surface F1 is formed, without restricting the shape of the outer lens 3 to open rearward.

  Similarly, after the light emitted from the second light source 5 and incident on the peripheral edge of the reflector 6 from the inner surface is internally reflected forward by the auxiliary reflecting surface 6b and transmitted through the joint surface F2, the inner lens 7 Irradiated forward of the lamp through the peripheral edge and the outer lens 3. Therefore, unlike the prior art, the inner lens 7 can emit light widely over the peripheral edge portion where the joint surface F2 is formed without restricting the shape of the inner lens 7 to the rear opening.

Moreover, the light irradiated from the peripheral part of the outer lens 3 among the light from the first light source 4 is transmitted through the joint surface F1 unlike the light irradiated from other than the peripheral part of the outer lens 3. Therefore, the peripheral edge portion and other portions emit light with a different appearance. Therefore, a novel lighting feeling in which the peripheral edge of the outer lens 3 is trimmed can be realized. For example, when the joint surface F1 is formed by heat welding, the joint surface F1 becomes rough and has a grain shape, so that light transmitted through the joint surface F1 is diffused. 3 appears to emit light more uniformly than the other peripheral portions.
Similarly, the light emitting mode of the inner lens 7 can also provide a novel lighting feeling with its peripheral edge trimmed.

  Further, since a part of the inner surface of the housing 2 is a light distribution reflecting surface 2a, that is, the housing 2 has both the light distribution reflecting surface 2a and the auxiliary reflecting surface 2b. The above-described light emitting mode can be realized without the need for a reflective member. Of course, the same applies to the reflector 6.

  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 housing 2, the outer lens 3, the reflector 6, and the inner lens 7 are joined by welding, but the joining surfaces F1 and F2 can be formed on a translucent surface. For example, the joining method is not limited to welding, and may be joined using, for example, a transparent adhesive.

  Further, the light distribution reflecting surfaces 2a and 6a and the auxiliary reflecting surfaces 2b and 6b may not be surfaces on which an aluminum coating is deposited as long as light can be reflected in a desired manner.

  Further, the portion of the housing 2 excluding the light distribution reflecting surface 2a and the auxiliary reflecting surface 2b may be a transparent material (translucent material) or may be painted as necessary. Good.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Housing (accommodating member)
2a Reflective surface for light distribution 2b Auxiliary reflective surface 3 Outer lens (translucent lens)
31 Projecting portion 4 First light source 5 Second light source 6 Reflector (accommodating member)
6a Reflective surface for light distribution 6b Auxiliary reflective surface 7 Inner lens (translucent lens)
71 Projection part F1, F2 joint surface

Claims (3)

A light source;
A storage member that is formed in a shape that opens forward, and that stores the light source therein,
A translucent lens for closing the opening of the housing member;
In a vehicle lamp comprising:
The housing member is made of a translucent material,
The housing member and the translucent lens are joined in the front-rear direction at the periphery of each other so that the joint surface thereof is translucent,
A vehicular lamp characterized in that an outer surface of a peripheral portion of the housing member internally reflects light emitted from the light source and incident on the peripheral portion from an inner surface toward the joint surface.   The vehicular lamp according to claim 1, wherein the housing member and the translucent lens are joined by welding.   3. The vehicular lamp according to claim 1, wherein a part of an inner surface of the housing member reflects light from the light source toward an opening of the housing member.

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