JP5808995B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp.

  Conventionally, a door mirror side turn lamp attached to a door mirror of an automobile is known as a vehicular lamp mounted on a vehicle. In this door mirror side turn lamp, it is stipulated by the law to illuminate a predetermined range diagonally rearward from the vehicle side, and from the viewpoint of visibility to other traffic and vehicle design, It is required to irradiate light obliquely forward.

  As a configuration that meets this latter requirement, in a general door mirror side turn lamp, the front of a long light guide that is disposed substantially horizontally along the rear surface of the door mirror (the front surface of the vehicle) is connected to the light guide. The light source is made to emit light over the entire length by the light source opposed to the end face in the longitudinal direction (see, for example, Patent Document 1).

JP 2011-44395 A

  By the way, in the above door mirror side turn lamp, the thickness of the light guide in the vertical direction may be limited due to the miniaturization of the lamp itself and the design requirements. However, if the thickness of the light guide is simply reduced in response to this, the light emission width of the light guide becomes narrow, and the visibility of the lamp is impaired.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vehicular lamp that can suppress a decrease in visibility even when the thickness of a long light guide is reduced. And

In order to solve the above-mentioned problem, the invention described in claim 1
A light guide formed in a long shape;
A light source disposed opposite one end surface of the light guide in the longitudinal direction;
In a vehicle lamp comprising:
The light guide is
One surface in the width direction of the light guide perpendicular to the longitudinal direction, a reflective surface that reflects light emitted from the light source and incident on the light guide from the one end surface;
An exit surface which is a surface opposite to the reflection surface and emits the light reflected by the reflection surface from the light guide;
Have
The width of the light guide from the reflection surface to the exit surface is formed to be longer than the thickness of the light guide along the direction perpendicular to both the width direction of the light guide and the longitudinal direction. And
Lens cuts for diffusing light reflected by the reflecting surface in the thickness direction are formed on both end surfaces in the thickness direction of the light guide.

The invention according to claim 2 is the vehicle lamp according to claim 1,
The reflection surface includes a plurality of prism portions that reflect light incident on the light guide from the one end surface toward the emission surface, and a plurality of reflection portions that reflect the light along the longitudinal direction. The light guiding and reflecting surfaces are individually and alternately linked along the longitudinal direction.

The invention according to claim 3 is the vehicle lamp according to claim 2,
The plurality of light guide reflection surfaces are characterized in that the length along the longitudinal direction becomes shorter as they are separated from the one end surface.

  According to the present invention, the light that enters the light guide from one longitudinal end surface of the light guide and is reflected by the reflection surface that is one surface in the width direction of the light guide is the reflection surface. Since the light is emitted from the opposite emission surface and part of the light is diffused in the thickness direction of the light guide by the lens cuts formed on both end surfaces in the thickness direction of the light guide, When the width of the light guide to the exit surface is longer than the thickness of the light guide, that is, when the width of the exit surface is reduced by reducing the thickness of the light guide. However, it is possible to irradiate light diffused widely in the thickness direction of the light guide, and as a result, it is possible to suppress a decrease in visibility.

It is a front view of the vehicular lamp in an embodiment. It is a disassembled perspective view of the vehicle lamp in embodiment. It is sectional drawing in the II-II line of FIG. It is sectional drawing in the III-III line of FIG. It is the enlarged view of (a) A part of FIG. 3, (b) It is an enlarged view of B part, (c) It is an enlarged view of C part. FIG. 5A is an enlarged view of a D portion, and FIG. 4B is an enlarged view of an E portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a vehicular lamp 1 according to the present embodiment, FIG. 2 is an exploded perspective view of the vehicular lamp 1, and FIG. 3 is a cross-sectional view taken along the line II-II in FIG. 4 is a cross-sectional view taken along the line III-III in FIG. 3, and FIGS. 5A to 5C are enlarged views of portions A to C in FIG. FIG. 5B is an enlarged view of a D part and an E part in FIG. 4.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” are viewed from a vehicle (not shown) on which the vehicle lamp 1 is mounted unless otherwise specified. It means direction.

As shown in FIGS. 1 to 4, the vehicular lamp 1 is a door mirror side turn lamp attached to a left side door mirror (not shown) of the vehicle, and includes a housing 2 and an outer lens 3.
The housing 2 is formed in a long shape, and is arranged so as to extend along a direction inclined rearward from the right side (vehicle center side) to the left side (vehicle side side). More specifically, the housing 2 is curved so as to warp obliquely forward, and is substantially along the front-rear direction at the rear end portion. The front surface of the housing 2 is opened obliquely forward over the entire length. In addition, a holding portion 21 for holding an inner lens 6 to be described later is recessed in the opening bottom surface of the housing 2 over substantially the entire length.

  The outer lens 3 is formed in a long shape that follows the housing 2, and a peripheral portion of the outer lens 3 is fitted to the peripheral portion of the housing 2 while covering the front opening of the housing 2. A convex portion 31 is formed on the front surface of the outer lens 3 over substantially the entire length, and a concave portion 32 corresponding to the convex portion 31 is formed on the inner surface (the inner surface of the lamp) on the opposite side. However, at the rear end portion of the outer lens 3, there is a portion where only the convex portion 31 is formed and the concave portion 32 is not formed, and the rear inner surface 33 which is the inner surface of the portion is from the second LED 5 described later. A fine lens cut (not shown) for diffusing light from the left side obliquely rearward is formed.

In the lamp chamber formed by the housing 2 and the outer lens 3, the first LED 4, the second LED 5, and the inner lens 6 are accommodated.
Among these, 1st LED4 is provided in the front-end part in a lamp chamber in the state mounted in the board | substrate 41, and is arrange | positioned so that the front-end surface of the longitudinal direction of the inner lens 6 may be opposed so that it may mention later. The first LED 4 is for causing the inner lens 6 to emit light.

  The second LED 5 is provided at the rear end portion of the lamp chamber in a state of being mounted on the substrate 51, and is disposed on the opening bottom surface of the housing 2 so as to face the rear inner surface 33 of the outer lens 3. The second LED 5 is for satisfying the light distribution requirement of the door mirror side turn lamp specified by law, and the light emitted from the second LED 5 is formed on the rear inner surface 33 of the outer lens 3. Irradiation is performed from the left (vehicle side) diagonally backward through a fine lens cut (not shown).

The inner lens 6 is formed in a long curved flat plate shape, and is disposed so as to extend along a direction inclined rearward from the right side (vehicle center side) to the left side (vehicle side side). 2 holding part 21 and the recessed part 32 of the outer lens 3.
The front end surface in the longitudinal direction of the inner lens 6 is opposed to the first LED 4, and serves as an incident surface 61 for allowing the light emitted from the first LED 4 to enter the inner lens 6.

  Of the surfaces along the longitudinal direction of the inner lens 6, one surface in the width direction of the inner lens 6, the surface on the vehicle center side, is emitted from the first LED 4 and enters the inner lens 6 from the incident surface 61. The reflection surface 62 reflects the reflected light. On the other hand, the surface opposite to the reflecting surface 62 (vehicle side) is an emitting surface 63 that emits the light reflected by the reflecting surface 62 from the inner lens 6.

  Among these, the reflection surface 62 is a curved surface that is curved so as to bend obliquely forward in a macroscopic manner, but in detail, as shown in FIGS. A plurality of prism portions 62a for reflecting light incident on the inner lens 6 toward the exit surface 63, and a plurality of light guide reflections for reflecting the light so as to guide the light along the longitudinal direction of the inner lens 6. The surfaces 62b,... Have a shape that is alternately connected along the longitudinal direction. However, the plurality of light guide reflection surfaces 62b,... Are formed such that the length along the longitudinal direction of the inner lens 6 decreases as the distance from the incident surface 61 at the front end of the inner lens 6 increases. Therefore, in the rear part of the inner lens 6, the reflection surface 62 does not have the light guide reflection surface 62b, but has a shape in which only a plurality of prism portions 62a,... Are connected (see FIG. 5C). In addition, each prism portion 62a and each light guide reflection surface 62b are formed very finely along the longitudinal direction of the inner lens 6, and the interior of the vehicular lamp 1 (housing 2) via the inner lens 6. The bottom surface of the screen is not visible.

  On the other hand, as shown in FIGS. 3 and 4, the emission surface 63 is formed in a curved surface shape that is curved so as to bend diagonally forward corresponding to the reflection surface 62. More specifically, the emission surface 63 has a stepped portion at the front portion, and a rear portion from the stepped portion is curved with a larger curvature than the reflecting surface 62. Therefore, the width of the inner lens 6 from the reflecting surface 62 to the emitting surface 63 is gradually shortened from the stepped portion toward the rear. The width of the inner lens 6 is formed longer than the thickness of the inner lens 6 along the vertical direction.

  Further, on the upper surface 64 and the lower surface 65 of the inner lens 6, as shown in FIG. 6, a plurality of lens cuts 64a,... And a plurality of lens cuts 65a,. Is formed. More specifically, the plurality of lens cuts 64a,... And the plurality of lens cuts 65a,... Reflect the light reflected by the reflecting surface 62 so as to diffuse up and down at an angle of about 20 ° up and down with respect to the horizontal plane. .

  In the vehicular lamp 1 having the above-described configuration, as shown in FIGS. 3 to 6, the light emitted from the first LED 4 and incident from the incident surface 61 into the inner lens 6 is guided to a plurality of the reflecting surfaces 62. Are reflected by the light reflecting surfaces 62b,... And the exit surface 63 and guided in the longitudinal direction, while being reflected by the plurality of prism portions 62a,. At this time, since the plurality of light guide reflection surfaces 62b,... Are formed so that the length along the longitudinal direction becomes shorter as they are separated from the incident surface 61, the inner lens 6 separated from the incident surface 61 is formed. Light can be suitably guided to the rear part, and can be suitably reflected to the emission surface 63 without transmitting light to the rear of the inner lens 6.

  Most of the light reflected by the plurality of prism parts 62a,... Is emitted from the inner lens 6 through the emission surface 63, passes through the convex part 31 of the outer lens 3, and radiates from the left to the left obliquely forward. Is done. Of the light reflected by the plurality of prism parts 62a,..., Light incident on the upper surface 64 or the lower surface 65 of the inner lens 6 is a plurality of lens cuts 64a formed on the upper surface 64 or the lower surface 65. Alternatively, the light is reflected so as to diffuse in the vertical direction by the plurality of lens cuts 65a,..., Is transmitted through the convex portion 31 of the outer lens 3, and is irradiated obliquely upward or obliquely downward from the horizontal.

  As described above, according to the vehicular lamp 1, the light enters the inner lens 6 from the incident surface 61 at the front end in the longitudinal direction of the inner lens 6, and the reflecting surface 62 is one surface in the width direction of the inner lens 6. The light reflected by the light is emitted from the emission surface 63 opposite to the reflection surface 62, and part of the light is formed on the upper surface 64 and the lower surface 65 at both ends in the thickness direction (vertical direction) of the inner lens 6. When the width of the inner lens 6 from the reflecting surface 62 to the emitting surface 63 is made longer than the thickness of the inner lens 6, that is, Even when the thickness of the inner lens 6 is reduced and the width of the emission surface 63 is made shorter, it is possible to irradiate light diffused widely in the thickness direction of the inner lens 6, and as a result It is possible to suppress a decrease in 認性.

  The reflecting surface 62 includes a plurality of prism portions 62 a that reflects light incident on the inner surface 6 from the incident surface 61 toward the exit surface 63, and the light along the longitudinal direction of the inner lens 6. Since the plurality of light guide reflection surfaces 62b,... To be reflected so as to be guided are individually and alternately connected along the longitudinal direction, the light incident from the incident surface 61 is separated from the incident surface 61. The light can be suitably reflected to the exit surface 63 while being guided to the rear part of the lens 6.

  Further, the plurality of light guide reflection surfaces 62b,... Are formed so that the length along the longitudinal direction of the inner lens 6 becomes shorter as the distance from the incident surface 61 increases. Light can be guided more suitably to the rear part of the inner lens 6 spaced from the incident surface 61, and can be suitably reflected to the emission surface 63 without transmitting light to the rear of the inner lens 6.

  In addition, each prism portion 62a and each light guide reflection surface 62b are finely formed along the longitudinal direction of the inner lens 6, so that the interior (housing 2) of the vehicular lamp 1 is interposed via the inner lens 6. The bottom surface of the vehicle lamp 1 cannot be visually recognized, and as a result, the appearance of the vehicular lamp 1 can be improved.

  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 inner lens 6 is formed in a flat plate shape, but this is because the upper surface 64 and the lower surface 65 of the inner lens 6 are parallel to each other, or the reflecting surface 62 and the emitting surface 63. It is not limited to what is orthogonal. Therefore, the upper surface 64 and the lower surface 65 of the inner lens 6 may be tapered inclined surfaces, for example.

  Further, the plurality of lens cuts 64 a formed on the upper surface 64 and the lower surface 65 of the inner lens 6 and the plurality of lens cuts 65 a,... Diffuse the light reflected by the reflecting surface 62 in the thickness direction of the inner lens 6. There is no particular limitation as long as it can be used.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Housing 3 Outer lens 33 Rear inner surface 4 First LED
5 Second LED
6 Inner lens (light guide)
61 Incident surface (one end surface)
62 reflective surface 62a prism portion 62b light guide reflective surface 63 light exit surface 64 upper surface 64a lens cut 65 lower surface 65a lens cut

Claims (3)

A light guide formed in a long shape;
A light source disposed opposite one end surface of the light guide in the longitudinal direction;
In a vehicle lamp comprising:
The light guide is
One surface in the width direction of the light guide perpendicular to the longitudinal direction, a reflective surface that reflects light emitted from the light source and incident on the light guide from the one end surface;
An exit surface which is a surface opposite to the reflection surface and emits the light reflected by the reflection surface from the light guide;
Have
The width of the light guide from the reflection surface to the exit surface is formed to be longer than the thickness of the light guide along the direction perpendicular to both the width direction of the light guide and the longitudinal direction. And
A vehicular lamp characterized in that lens cuts for diffusing light reflected by the reflecting surface in the thickness direction are formed on both end surfaces of the light guide in the thickness direction.   The reflection surface includes a plurality of prism portions that reflect light incident on the light guide from the one end surface toward the emission surface, and a plurality of reflection portions that reflect the light along the longitudinal direction. 2. The vehicular lamp according to claim 1, wherein the light guide reflection surface is alternately and continuously connected along the longitudinal direction.   3. The vehicular lamp according to claim 2, wherein the plurality of light guide reflection surfaces have shorter lengths along the longitudinal direction as they are separated from the one end surface. 4.

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