JP2012119242A - Vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp which can form secondary light-distribution with high flexibility of shapes without requiring an exclusive light source used for the secondary light-distribution.SOLUTION: The vehicular lamp 1 includes a light source 3, an optical lens 4 arranged in front of the light source 3 and controlling light-distribution of light emitted from the light source 3, and a transparent inner lens 5 arranged in front of the optical lens 4. Light-transmitting ribs 51 projected inside a lamp at parts except designated zones of the inner lens 5 in front of the light source 3 are formed on a rear surface of the inner lens 5.

Description

  The present invention relates to a vehicular lamp.

  2. Description of the Related Art Conventionally, as a vehicular lamp used for an automobile rear lamp, a signal lamp, and the like, there is known a lamp capable of forming a production sub-light distribution mainly for improving appearance, in addition to a predetermined main light distribution.

  As this type of vehicular lamp, for example, there is a lamp in which a light guide rod described in Patent Document 1 is arranged in the lamp to emit light. However, in such a vehicular lamp, a light source for causing the light guide bar to emit light is required in addition to the light source for main light distribution, and the light guide bar cannot be formed into a free shape. Is limited to a simple straight line, for example.

  In this respect, for example, in the vehicular lamp described in Patent Document 2, the light from the lower light source is reflected forward by the reflecting surface and irradiated forward through the convex portion of the inner lens in front of the reflecting surface. It seems that a secondary light distribution such as a curved shape can be formed according to the shape.

JP 2001-281457 A JP 2004-139903 A

  However, in the vehicular lamp described in Patent Document 2, a reflecting surface must be provided so that light from the lower light source can be appropriately reflected. Therefore, the position and shape of the reflecting surface are the position and irradiation of the light source. As a result of being limited by the range or the like, the shape of the secondary light distribution is also limited.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicular lamp capable of forming a sub-light distribution with a high degree of freedom without requiring a light source dedicated to the sub-light distribution. .

In order to solve the above-mentioned problem, the invention described in claim 1
A light source;
An optical member that is disposed in front of the light source and controls light distribution of the light emitted from the light source;
A transparent lens disposed in front of the optical member;
In a vehicle lamp comprising:
The lens is characterized in that a translucent rib protruding from the inside of the vehicular lamp is formed on a portion of the lens excluding a predetermined range in front of the light source.

The invention according to claim 2 is the vehicle lamp according to claim 1,
A flexible board on which the light source is mounted, and a bracket that supports the flexible board,
The flexible substrate and the bracket are formed of a translucent member.

The invention according to claim 3 is the vehicle lamp according to claim 1 or 2,
The rib is formed in a continuous line shape along the inner surface of the lens.

Invention of Claim 4 is a vehicle lamp as described in any one of Claims 1-3,
The rib is formed in a rectangular shape in cross section, and the surface exposed to the inside of the vehicular lamp is textured.

Invention of Claim 5 is a vehicle lamp as described in any one of Claims 1-4,
The rib is formed in a curved shape.

Invention of Claim 6 is the vehicle lamp as described in any one of Claims 1-5,
A plurality of the ribs are formed and intersect each other.

  According to the present invention, the main light distribution is formed by the light distribution control of the light from the light source by the optical member, and the light from the light source is refracted by the rib of the lens through the optical member and irradiated to the outside of the lamp. Thus, a sub-light distribution that follows the shape of the rib is formed. Accordingly, the sub light distribution can be formed using the light source for main light distribution without requiring a light source dedicated to the sub light distribution. In addition, since the rib shape such as height, width and length can be freely formed, a sub-light distribution with a high degree of freedom in shape following the rib shape can be formed.

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 a figure which shows the rear part of the vehicle by which the vehicle lamp in the modification of embodiment is mounted. It is a front view of the vehicle lamp in the modification of embodiment. It is a figure which shows the back surface of the inner lens in the modification of embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view 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, unless otherwise specified, the descriptions of “up”, “down”, “front”, “rear”, “left”, “right”, “inside”, and “outside” are the directions viewed from the vehicular lamp 1. As used, it is used in correspondence with the description in the drawings.

  As shown in FIGS. 1 and 2, a vehicular lamp 1 is a rear lamp mounted on the left and right of a rear portion of a vehicle (not shown). And. Inside the lamp chamber formed by the housing 2 and the outer lens, three light sources 3,... Arranged in the left-right direction, the optical lens 4 and the inner lens 5 are accommodated.

  Among these, the light sources 3,... Are LEDs (light emitting diodes) having a forward optical axis Ax, and emit light substantially radially about the optical axis Ax. The light sources 3 are mounted on a flexible substrate 32 supported on the rear side by a bracket 31. The bracket 31 and the flexible substrate 32 are mainly formed of a translucent member.

  The optical lens 4 is a curved plate-like translucent member arranged on the front side of the light sources 3, and has projecting portions 41 that project forward so as to cover the front of the light sources 3. ing. The protruding portion 41 is formed in a substantially cylindrical shape having the optical axis Ax as a rotationally symmetric axis. The front plate of the projecting portion 41 is a lens portion 41a that forms a main light distribution by controlling the light emitted from the light source 3, and the front surface thereof is formed in a fish-eye lens shape and the rear surface is Fresnel. It is formed in a lens shape.

  The inner lens 5 is a transparent translucent member formed in a curved plate shape that gently curves backward, and is erected in front of the optical lens 4. On the rear surface of the inner lens 5, two ribs 51, 51 projecting from the inside of the lamp are integrally formed with the inner lens 5. The ribs 51 and 51 are formed in a long line shape continuous in the left-right direction along the rear surface (inner surface) of the inner lens 5. The ribs 51 and 51 are formed in a rectangular cross section (substantially trapezoidal in the present embodiment), and are subjected to graining on three surfaces exposed to the inside of the lamp. The ribs 51 are formed on the upper side and the lower side of the light source 3 one by one. However, the position of the rib 51 may be a portion of the inner lens 5 excluding a predetermined range in front of the light source 3 through which the light emitted from the optical lens 4 and forming the main light distribution passes. It is more preferable that the portion is located within a predetermined range from the light source 3. In addition, the height (projection height) of the rib 51 is 4 to 6 mm in this embodiment, and is formed larger than the width.

  In the vehicular lamp 1 having the above-described configuration, the light emitted from the light source 3 is controlled by the lens portion 41a of the optical lens 4 and forwardly passed between the two ribs 51, 51 of the inner lens 5. The main light distribution is formed. At the same time, out of the light emitted from the light sources 3,. While being refracted and diffused on the textured surface and irradiated forward, a sub-light distribution following the shape of the rib 51 is formed.

  According to the vehicular lamp 1 described above, since the main light distribution and the sub light distribution are formed by the light emitted from the same light source 3, the main light distribution is not required without requiring a light source dedicated to the sub light distribution. The secondary light distribution can be formed by using the light source 3 for use, and consequently the secondary light distribution can be formed at low cost.

In addition, since the shape of the rib 51 such as the height, width, and length can be freely formed, a sub-light distribution with a high degree of freedom in shape following the shape of the rib 51 can be formed. For example, the height of the rib 51 (projection height) can be increased to give a stereoscopic effect to the sub-light distribution.
Furthermore, the shape of the rib 51 such as height, width, and length can be freely formed, so that even if the rear surface of the inner lens 5 is a free-form surface, a three-dimensional sub light distribution can be formed. it can.

  In addition, since the flexible substrate 32 on which the light source 3 is mounted and the bracket 31 that supports the flexible substrate 32 are formed of a translucent member, the light source 3 is as if viewed from the front when the light source 3 is caused to emit light. It can be visually recognized as (light emitting part) is floating.

[Modification]
Then, the modification of the said embodiment is demonstrated. In addition, the same code | symbol is attached | subjected to the component similar to the said embodiment, and the description is abbreviate | omitted.

FIG. 3 is a view showing a rear portion of a vehicle on which the vehicle lamp 1A according to this modification is mounted. FIG. 4 is a front view of the vehicle lamp 1A. FIG. 4 is an inner view of the vehicle lamp 1A. It is a figure which shows the back surface (rear surface) of lens 5A.
In FIG. 4, the rib 51 </ b> A formed on the rear surface of the inner lens 5 </ b> A is originally illustrated with a broken line (hidden line), but is illustrated with a solid line for ease of viewing.

  As shown in these drawings, the vehicular lamp 1A is a rear lamp mounted on the right side of the rear portion of the vehicle. The vehicular lamp 1A includes a large number of light sources 3 arranged irregularly, and includes an inner lens 5A instead of the inner lens 5 in the above embodiment.

  The inner lens 5A is formed in a substantially L shape in front view with the upper part bent leftward, and has a plurality of ribs 51A,. Each of the ribs 51A,... Is formed in a curved shape and extends indefinitely vertically and horizontally so as to sew between the light sources 3,. The other points of the inner lens 5A and the rib 51A are configured in the same manner as the inner lens 5 and the rib 51 in the above embodiment.

  According to the vehicle lamp 1A described above, the ribs that are formed in a curved shape and extend indefinitely while crossing each other as well as exhibiting the same effect as the vehicle lamp 1 in the above embodiment. By 51A, a sub-light distribution excellent in design can be formed.

  Embodiments to which the present invention can be applied are not limited to the above-described embodiments and modifications thereof, and can be changed as appropriate without departing from the spirit of the present invention.

  For example, although the optical lens 4 (lens portion 41a) has been described as an optical member that performs light distribution control for main light distribution in the embodiment and the modification thereof, the optical member is, for example, a reflector or the like. Also good.

  In addition, each surface of the rib 51 (51A) is subjected to the texture processing, but each surface may be a clear surface, or may be a surface subjected to lens cutting instead of the texture processing.

  The vehicle lamp 1 is not limited to a rear lamp, and may be a vehicle lamp such as a signal lamp or a headlamp.

1,1A Vehicle lamp 2 Housing 3 Light source 4 Optical lens (optical member)
5,5A Inner lens (lens)
31 Bracket 32 Flexible substrate 41 Projection portion 41a Lens portion 51, 51A Rib Ax Optical axis

Claims (6)

A light source;
An optical member that is disposed in front of the light source and controls light distribution of the light emitted from the light source;
A transparent lens disposed in front of the optical member;
In a vehicle lamp comprising:
The lens is provided with a light-transmitting rib projecting on the inner side of the vehicle lamp at a portion of the lens excluding a predetermined range in front of the light source. Light fixture. A flexible board on which the light source is mounted, and a bracket that supports the flexible board,
The vehicular lamp according to claim 1, wherein the flexible substrate and the bracket are formed of a translucent member.   The vehicular lamp according to claim 1, wherein the rib is formed in a continuous line shape along an inner surface of the lens.   The vehicle according to any one of claims 1 to 3, wherein the rib is formed in a rectangular shape in cross section, and a surface that is exposed on the inner side of the vehicular lamp is textured. Lamps.   The vehicular lamp according to any one of claims 1 to 4, wherein the rib is formed in a curved shape.   The vehicular lamp according to any one of claims 1 to 5, wherein a plurality of the ribs are formed and intersect each other.

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