JP2014164975A - Vehicle lighting appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To illuminate a side of a side face of a light guide body while illuminating a front part of a front face of the light guide body even if diffusion reflection parts are formed at a rear face and the side face of the light guide body.SOLUTION: One end face of a light-incident side light guide part 13a of a light guide body 13 opposes a light source 11, the other end of the light-incident side light guide part is connected to one end part of a front illumination light guide part 13b, one end part of a side illumination light guide part 13c is connected to the other end of the front illumination light guide part 13b, the side illumination light guide part 13c is extended sideways from the other end of the front illumination light guide part 13b, and bent rearward, a diffusion reflection part 13h is formed at a rear face of the front illumination light guide part 13b, a diffusion refection part 13j is formed at a side face of the side illumination light guide part 13c, and a reflection face is formed in a region which opposes the side illumination light guide part 13c of a body 14.

Description

  The present invention relates to a vehicular lamp.

  Patent Document 1 discloses a vehicular lamp using a light guide. The light taken into the light guide from one end of the light guide is guided toward the other end while being totally reflected by the surface of the light guide. In order to emit light traveling inside the light guide from the exit surface, it is necessary to increase the luminous flux of light incident on the exit surface at less than the critical angle. For this purpose, a cut, a convex portion, or the like is formed on the surface opposite to the emission surface, and the surface is processed to be uneven so that light is diffusely reflected on the surface.

JP 2012-169116 A

By the way, in order to emit light in two different directions from two different surfaces (for example, the front surface and the side surface) of the light guide, it is necessary to shape the opposite surfaces of the two surfaces into irregularities. That is, in order to illuminate the front of the front surface of the light guide, the rear surface on the opposite side is processed to be uneven, and to illuminate the side of the side surface of the light guide, the opposite side is processed to be uneven. There is a need.
However, when the light guide is molded using a mold, both of the opposite surfaces of the two different surfaces of the light guide cannot be made uneven because of the direction of taking out the light guide from the mold. Sometimes. In other words, when the rear surface of the light guide is processed to be uneven in order to illuminate the front of the front surface of the light guide, the opposite surface of the side surface is uneven by a mold to illuminate the side of the side surface of the light guide. The shape cannot be processed.
Therefore, the problem to be solved by the present invention is to illuminate the front of the front surface of the light guide even when the diffuse reflection portions such as the convex portions and the cut are formed on the rear surface and side surfaces of the light guide. However, the side of the side surface of the light guide can be illuminated.

  In order to solve the above problems, the invention according to claim 1 is a light source, a light guide having an incident side light guide, a front illumination light guide, and a side illumination light guide, and the light guide. A body to which the body is attached, one end surface of the incident-side light guide portion is opposed to the light source, and the other end portion of the incident-side light guide portion is connected to one end portion of the front illumination light guide portion. One end of the side illumination light guide is connected to the other end of the front illumination light guide, and the side illumination light guide is laterally extended from the other end of the front illumination light guide. Extended and bent backward, a diffuse reflection part is formed on the rear surface of the front illumination light guide part, a diffuse reflection part is formed on a side surface of the side illumination light guide part, and the front illumination light guide part is Provided on the front of the body, the light guide for side illumination is provided on the side of the body, A reflective surface is formed at a portion of the body facing the light guide for side illumination, the light guide on the incident side takes in light from the light source from one end surface, and the light guide for front illumination is guided on the incident side. The light taken in by the light part is guided toward the other end part, and the light is emitted from the front surface, and the side illumination light guide part guides the light guided by the front illumination light guide part. The light is guided toward the surface and emitted from the surface facing the body, and the reflecting surface reflects the light emitted from the surface facing the body of the light guide for side illumination to the side. A vehicular lamp characterized by the above.

  According to a second aspect of the present invention, an accommodation groove is formed on a side surface of the body, the side illumination light guide is accommodated in the accommodation groove, and the reflection surface is formed on a bottom surface of the accommodation groove. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided.

  The invention according to claim 3 further includes a reflecting portion that is provided on a side surface of the body so as to extend laterally from the side surface of the body, and abuts against a tip surface of the light guide for side illumination. The vehicle lamp according to claim 1 or 2.

According to the present invention, since the diffuse reflection portion is formed on the rear surface of the front illumination light guide portion, the light guided by the front illumination light guide portion is emitted forward from the front surface of the front illumination light guide portion. To do. Therefore, the front of the vehicular lamp can be illuminated.
Moreover, since the diffuse reflection part is formed on the side surface of the side illumination light guide part, the light guided by the side illumination light guide part is emitted inward from the opposite surface. Light emitted from the side illumination light guide is reflected laterally by the reflecting surface of the body. Therefore, the side of the vehicular lamp can be illuminated.

It is a disassembled perspective view of a vehicle lamp. It is a side view of the upper part of a vehicle lamp. It is III-III sectional drawing. FIG. 4 is an enlarged view of a region VI shown in FIG. 3.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention. Therefore, the technical scope of the present invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is an exploded perspective view of the vehicular lamp 1. FIG. 2 is a side view of the vehicular lamp 1. FIG. 3 is a cross-sectional view showing the surface along III-III shown in FIG. 2 as viewed in the direction of the arrow. FIG. 4 is an enlarged view of region IV shown in FIG. In the following description, “upper”, “lower”, “front”, “rear”, “left”, “right” are “upper”, “lower”, “lower” of the vehicle equipped with the vehicle lamp 1, respectively. “Front”, “Back”, “Left”, “Right”. Therefore, the left and right directions are determined by looking from the rear to the front (from the so-called driver's viewpoint).

  The vehicular lamp 1 is a signal lamp, particularly a positioning lamp. The vehicular lamp 1 may be a positioning lamp that also serves as a side marker lamp.

  The vehicular lamp 1 is a right positioning lamp, and the left positioning lamp has a structure in which the vehicular lamp 1 is reversed left and right.

  The vehicular lamp 1 is attached to a headlamp. Here, the headlamp will be briefly described. The headlamp housing opens from the front to the side, and a transparent outer lens is attached to the housing so as to block the opening of the housing. A lamp unit or a lamp unit capable of switching between a low beam and a high beam is accommodated in the housing, and the extension 2 is mounted in the housing so as to be disposed in front of the lamp unit. An opening 2a is formed in the extension 2, and light emitted from the lamp unit passes forward through the opening 2a. The vehicular lamp 1 is mounted in the headlamp housing on the back side of the extension 2.

  The vehicular lamp 1 includes a substrate 10, a first light source 11, a second light source 12, a light guide 13, a body (reflector or extension) 14, a pedestal 15, a reflecting portion 16, an inner lens 21, and the like. 1 and 2, the illustration of the inner lens 21 is omitted.

  The light sources 11 and 12 are mounted on the substrate 10. The light sources 11 and 12 are light emitting diodes. The light sources 11 and 12 may be light sources other than light emitting diodes (for example, organic light emitting diodes (organic EL elements), incandescent bulbs, discharge lamps, and other light sources).

  The board | substrate 10 is mounted on the base 15, and the board | substrate 10 is attached to the base 15 with fixing tools, such as a screw | thread or a nail | claw. The light sources 11 and 12 are directed upward, the optical axis of the light source 11 extends upward from the light source 11, and the optical axis of the light source 12 extends upward from the light source 12.

  The body 14 is provided in a state where it is stood at the rear end of the base 15. The body 14 and the pedestal 15 are integrally formed.

  A circular opening 14 a is formed on the front surface of the body 14. The opening 14a penetrates the body 14 back and forth. A lamp unit of a headlamp is disposed on the back side of the body 14, and light emitted from the lamp unit passes through the opening 14a forward.

  A ring-shaped first accommodation groove 14b is formed in the front surface of the body 14, and the first accommodation groove 14b opens forward. The first accommodation groove 14b is provided around the opening 14a, and the opening 14a is surrounded by the first accommodation groove 14b.

  The second accommodation groove 14c is formed from the front surface of the body 14 to the side surface (surface facing outward). The part formed in the front surface of the body 14 among the second accommodation grooves 14c opens forward, and the part formed on the side surface of the body 14 opens sideways (outward direction). An end portion of the second accommodation groove 14c is continuous with the upper portion of the first accommodation groove 14b, and a portion of the second accommodation groove 14c formed on the front surface of the body 14 extends from the upper portion of the first accommodation groove 14b to the first accommodation groove. 14b extends in the tangential direction. The site | part formed in the side surface of the body 14 among the 2nd accommodation grooves 14c extends in the front-back direction. A bottom surface 14d (see FIG. 3) of the second accommodation groove 14c is a free-form surface.

  A reflecting portion 16 is provided at the rear end of the side surface of the body 14. The reflecting portion 16 extends laterally from the rear end portion of the side surface of the body 14. The second accommodation groove 14 c extends from the front edge of the side surface of the body 14 to the reflection portion 16 at the rear edge of the body 14, and the rear side of the rear end portion of the second accommodation groove 14 c is closed by the reflection portion 16. The reflecting portion 16 and the body 14 are integrally formed.

  A reflective film (for example, a metal deposition film such as silver or aluminum) 20 is formed on the front surface of the body 14 and the base 15 (see FIG. 4). The reflecting film 20 is also formed in the receiving grooves 14b and 14c, and the bottom surface of the first receiving groove 14b becomes a concave mirror facing forward, and the bottom surface 14d of the second receiving groove 14c becomes a concave mirror facing sideways. .

  The light guide 13 includes a first incident light guide 13a, a first front illumination light guide 13b, a side illumination light guide 13c, a second incident light transmission part 13d, and a second front illumination light guide 13e. Have The incident-side light guide portions 13a and 13d, the front illumination light guide portions 13b and 13e, and the side illumination light guide portion 13c are made of a transparent resin material, and are integrally formed.

  The first front light guide 13b is provided in an arc shape, and the second front light guide 13e is provided in an arc shape. Lower end portions of the front illumination light guide portions 13b and 13e are connected to each other, and a combination of the front illumination light guide portions 13b and 13e is provided in a ring shape. The “front illumination” of the front illumination light guides 13b and 13e refers to illuminating the front of the vehicular lamp 1.

  The upper end part of the 1st incident side light guide part 13a is connected with the lower end part of the light guide part 13b for 1st front illuminations. The first incident side light guide part 13a extends from the lower end of the first front illumination light guide part 13b in the tangential direction of the first front illumination light guide part 13b, and is bent downward in a bow shape. The front end surface (lower end surface) of the first incident side light guide unit 13a faces downward.

  The upper end portion of the second incident side light guide portion 13d is connected to the lower end portion of the second front illumination light guide portion 13e. 13 d of 2nd incident side light guide parts are extended in the tangent direction of the light guide part 13e for 2nd front illumination from the lower end part of the light guide part 13e for 2nd front illumination, and are bent in the shape of a bow downward. The front end surface (lower end surface) of the second incident side light guide part 13d faces downward.

  One end of the side illumination light guide 13c is connected to the upper end of the first front illumination light guide 13b. The side illumination light guide 13c is provided in a horizontal L shape when the side illumination light guide 13c is viewed from above. That is, the side illumination light guide 13c extends from the upper end of the first front illumination light guide 13b in the tangential direction (side) of the first front illumination light guide 13b and is bent backward. A portion from the bent portion to the tip of the side illumination light guide portion 13c extends in the front-rear direction. A front end surface (rear end surface) 13f of the side illumination light guide portion 13c faces rearward (see FIGS. 3 and 4).

  The light guide 13 is attached to the body 14.

  Front illumination light guides 13 b and 13 e are provided on the front surface of the body 14. That is, the front illumination light guide portions 13b and 13e are accommodated in the first accommodation groove 14b. Front illumination light guides 13b and 13e are provided along the edge of the opening 14a, and the opening 14a is surrounded by the front illumination light guides 13b and 13e. An attachment portion 17 is provided on the front illumination light guide portion 13b, and the attachment portion 17 is fixed to the body 14 with a fastener such as a screw.

  Incident-side light guides 13 a and 13 d are arranged in front of the body 14 on the light sources 11 and 12. An attachment portion 18 is provided between the incident-side light guide portions 13a and 13d, and the attachment portion 18 is fixed to the body 14 with a fastener such as a screw. The tip surface of the first incident side light guide part 13 a faces the first light source 11, and the tip surface of the second incident side light guide part 13 d faces the second light source 12.

  A side illumination light guide 13 c is provided from the front surface to the side surface of the body 14. That is, the side illumination light guide portion 13c is accommodated in the second accommodation groove 14c. An attachment portion 19 is provided at the tip of the side illumination light guide portion 13c, and the attachment portion 19 is fixed to the reflection portion 16 with a fastener such as a screw. Further, the front end surface 13f of the side illumination light guide portion 13c comes into contact with the front surface (reflection surface) of the reflection portion 16.

  A plurality of diffuse reflection portions (convex portions) 13h are formed on the rear surface of the first front illumination light guide portion 13b (see FIG. 3). The diffuse reflection portion 13h extends in the vertical direction along the rear surface of the first front illumination light guide portion 13b, and the diffuse reflection portion 13h has a triangular cross section when viewed from above or below. Therefore, the rear surface of the first front illumination light guide portion 13b is provided in an uneven shape. A plurality of diffuse reflection portions 13i having a triangular cross section are also formed on the rear surface of the second front illumination light guide portion 13e, and the rear surface of the first front illumination light guide portion 13b is provided in an uneven shape. The entire rear surfaces of the front illumination light guides 13b and 13e may be provided in an uneven shape, or part of the rear surfaces of the front illumination light guides 13b and 13e may be provided in an uneven shape. Moreover, the site | part provided in uneven shape among the rear surfaces of the light guide parts 13b and 13e for front illuminations may be dotted.

  Since the first accommodation groove 14b opens forward, the front surfaces of the front illumination light guides 13b and 13e are exposed. The front surfaces of the front illumination light guides 13b and 13e are light emission surfaces.

  A plurality of diffuse reflection portions (convex portions) 13j are formed on the side surface (surface facing outward) of the side illumination light guide portion 13c. The diffuse reflection portion 13j extends in the vertical direction along the side surface of the side illumination light guide portion 13c, and the diffuse reflection portion 13j has a triangular cross section when viewed from above or below. Therefore, the side surface of the side illumination light guide portion 13c is provided in an uneven shape. Of the side surface of the side light guide part 13c, the portions provided in a concave-convex shape may be arranged in the front-rear direction at intervals, and the convex-concave portions may be scattered.

  Since the site | part formed in the front surface of the body 14 among the 2nd accommodation grooves 14c opens ahead, the front surface of the light guide part 13c for side illumination accommodated in the site | part is exposed. Since the part formed in the side surface of the body 14 in the second accommodation groove 14c opens to the side, the side surface of the side illumination light guide part 13c accommodated in the part is exposed, and the diffuse reflection part 13j is also exposed. To do. Further, since the side illumination light guide portion 13c is accommodated in the second accommodation groove 14c, the surface facing the inner side of the side illumination light guide portion 13c (the surface opposite to the diffuse reflection portion 13j) is the second. It faces the bottom surface 14d of the housing groove 14c.

  The inner lens 21 is attached to the body 14 so as to close the first accommodation groove 14b and the second accommodation groove 14c. The front illumination light guide portions 13 b and 13 e and the side illumination light guide portion 13 c of the light guide 13 are accommodated inside the inner lens 21. The inner lens 21 is made of a transparent material and allows light to pass through.

  The body 14 is disposed on the back side of the extension 2. A part of the body 14 is hidden behind the extension 2, and another part of the body 14 is exposed to the front and side through the opening 2a. In particular, the housing grooves 14b and 14c are disposed in the opening 2a. Some or all of the front illumination light guides 13b and 13e are disposed in the opening 2a, and the front surfaces of the front illumination light guides 13b and 13e are exposed to the front of the extension 2 through the opening 2a. The side illumination light guide 13c is also exposed to the front and side of the extension 2 through the opening 2a. The substrate 10, the light source 12, the pedestal 15, the incident side light guide portions 13 a and 13 d, the reflection portion 16, and the attachment portions 17 to 19 are hidden behind the extension 2.

  When the second light source 12 emits light, the light emitted by the second light source 12 passes through the distal end surface of the second incident light guide part 13d and is taken into the second incident light guide part 13d. The light taken into the second incident light guide 13d is guided toward the upper end of the second incident light guide 13d by the second incident light guide 13d. The light guided by the second incident-side light guide 13d is guided by the second front illumination light guide 13e toward the upper end of the second front illumination light guide 13e. A part of the light taken into the second incident-side light guide part 13d is guided to the first front illumination light guide part 13b.

  When the first light source 11 emits light, the light emitted by the light source 11 passes through the tip surface of the first incident side light guide part 13a and is taken into the first incident side light guide part 13a. The light taken into the first incident light guide 13a is guided by the first incident light guide 13a toward the upper end of the first incident light guide 13a. The light guided by the first incident light guide 13a is guided by the first front illumination light guide 13b toward the upper end of the first front illumination light guide 13b. The light guided by the first front illumination light guide unit 13b is guided by the side illumination light guide unit 13c toward the front end surface 13f of the side illumination light guide unit 13c. A part of the light taken into the first incident side light guide part 13b is guided to the second front illumination light guide part 13e.

  Light traveling in the incident side light guides 13a and 13d, the front illumination light guides 13b and 13e, and the side illumination light guide 13c is incident on the incident side light guides 13a and 13d and the front illumination light guide 13b. , 13e and the side illumination light guide part 13c, light is guided while repeating total reflection.

  When the light traveling in the front illumination light guides 13b and 13e is diffusely reflected by the uneven rear surfaces (diffuse reflection parts 13h and 13i), the light is incident on the front surfaces of the front illumination light guides 13b and 13e. A component of less than the critical angle of the light is emitted from the front surface of the front illumination light guides 13b and 13e to the outside of the front illumination light guides 13b and 13e. When light emitted from the front surfaces of the front illumination light guides 13b and 13e is irradiated forward, and the vehicle lamp 1 is observed from the front, the front surfaces of the front illumination light guides 13b and 13e appear to shine.

  When the light traveling inside the side illumination light guide 13c is diffusely reflected by the diffuse reflection part 13j, it enters the surface facing the inner side of the side illumination light guide part 13c (the opposite surface of the diffuse reflection part 13j). The component with less than the critical angle out of the emitted light is emitted to the outside of the side illumination light guide 13c from the surface facing the inner direction of the side illumination light guide 13c. The light emitted from the surface facing the inner direction of the side illumination light guide 13c is reflected to the side (outward direction) by the bottom surface (reflection surface) 14d of the second accommodation groove 14c. The reflected light passes through the side illumination light guide 13c and is irradiated to the side of the side illumination light guide 13c. Therefore, even if the vehicle lamp 1 is observed from the direction of 80 ° outward from the horizontal reference axis extending in the vehicle traveling direction through the center of the vehicle lamp 1, the side surface (outward direction) of the side illumination light guide 13c is observed. ) And the bottom surface 14d of the second receiving groove 14c appear to shine, and the shining portion can be seen through. The light distribution of the light traveling to the side of the side illumination light guide 13c is determined by the shape of the bottom surface 14d of the second housing groove 14c, the shape of the side illumination light guide 13c, and the like.

  The light distribution of the light emitted forward from the front surfaces of the light guides 13b and 13e for front illumination and the light distribution of the light reflected by the bottom surface 14d of the second receiving groove 14c are combined. Meet the standards.

  According to the present embodiment, the following effects can be obtained.

(1) The light guide 13 is molded using a mold. For the convenience of removing the light guide 13 from the mold, the diffuse reflection portions 13h and 13i are formed on the rear surfaces of the front illumination light guide portions 13b and 13e and then directed inward of the side illumination light guide portion 13c. The diffuse reflection portion cannot be formed on the surface. If it does so, the diffuse reflection part 13j must be formed in the side surface of the light guide part 13c for side illumination. However, since light is emitted from the surface facing the inner direction of the side illumination light guide 13c (the surface opposite to the diffuse reflection portion 13j), the side illumination light guide 13c alone is used. The side of the side surface of the portion 13c cannot be illuminated. However, in this embodiment, the portion facing the inner-facing surface of the side illumination light guide 13c, that is, the bottom surface 14d of the second housing groove 14c is a reflection surface. Light emitted from the surface facing inward is reflected laterally by the bottom surface 14d. Therefore, it is possible to illuminate the side of the side surface of the side illumination light guide 13c.

(2) The bottom surface 14d of the second accommodation groove 14c is a free-form surface, and a desired light distribution can be obtained by designing the geometric shape of the bottom surface 14d. That is, even when the vehicle lamp 1 is observed from the direction of 80 ° outward from the horizontal reference axis extending in the vehicle traveling direction through the center of the vehicle lamp 1, the light emission state of the side surface of the side light guide 13c Can see through.

(3) Since the front end surface 13f of the side illumination light guide portion 13c contacts the reflection surface of the reflection portion 16, the light guided to the front end surface 13f is reflected by the reflection surface, and the reflected light is side illumination. The light is guided in the opposite direction inside the light guide portion 13c. Therefore, the light use efficiency can be improved and the side of the side surface of the side illumination light guide 13c can be illuminated more brightly.

(4) Since the front illumination light guides 13b and 13e are accommodated in the first accommodation groove 14b and the side illumination light guide 13c is accommodated in the second accommodation groove 14c, the light guide 13 is attached to the body 14. It is easy to install and its mounting strength is high. Moreover, the attachment position of the light guide 13 can be made accurate.

[Modification]
Embodiments to which the present invention is applicable are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention. Hereinafter, modified examples will be described.

  The vehicular lamp 1 may be a direction indicator (turn signal lamp) instead of the positioning lamp.

  The vehicle lamp 1 is not provided in the headlamp, but the vehicle lamp 1 may be provided in the rear combination lamp. In this case, the front surfaces of the front illumination light guides 13b and 13e are directed to the rear of the vehicle, and the side surfaces of the side illumination light guides 13c are directed to the side of the vehicle. When the vehicular lamp 1 is provided in a rear combination lamp, the vehicular lamp 1 is a tail lamp, a stop lamp, a tail / stop lamp, a turn signal lamp, or other signal lamp.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 11,12 Light source 13 Light guide 13a, 13d Incident side light guide 13b, 13e Front illumination light guide 13c Side illumination light guide 14 Body 14b First accommodation groove 14c Second accommodation groove 14d First Bottom surface of two receiving grooves 16 Reflecting portion 20 Reflecting film

Claims (3)

A light source;
A light guide having an incident side light guide, a front illumination light guide, and a side illumination light guide;
A body to which the light guide is attached,
One end surface of the incident-side light guide is opposed to the light source, the other end of the incident-side light guide is connected to one end of the front illumination light guide, and one end of the side illumination light guide Is connected to the other end of the front illumination light guide,
The side illumination light guide portion extends laterally from the other end portion of the front illumination light guide portion and is bent backward;
A diffuse reflection part is formed on the rear surface of the front illumination light guide part,
A diffuse reflection part is formed on a side surface of the side illumination light guide part,
The front illumination light guide is provided on the front surface of the body;
The side illumination light guide is provided on a side surface of the body;
A reflective surface is formed on a portion of the body facing the side illumination light guide,
The incident side light guide unit takes in light of the light source from one end surface,
The front illumination light guide unit guides the light taken in by the incident side light guide unit toward the other end, and emits the light from the front surface,
The side illumination light guide part guides the light guided by the front illumination light guide part toward the distal end surface, and emits the light from the surface facing the body side,
The reflective surface reflects the light emitted from the surface facing the body side of the side illumination light guide unit to the side,
A vehicular lamp characterized by the above. A receiving groove is formed on the side of the body,
The side illumination light guide is accommodated in the accommodation groove, and the reflection surface is formed on the bottom surface of the accommodation groove.
The vehicular lamp according to claim 1. A reflective portion that is provided on a side surface of the body so as to extend laterally from the side surface of the body, and abuts against a front end surface of the light guide for side illumination;
The vehicular lamp according to claim 1 or 2.

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