JP2010165488A - Vehicular lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To constitute a vehicular lamp using a built-in light guide body high in design performance such as a side turn lamp assembled in a sideview mirror. <P>SOLUTION: In the turn lamp 2 using a light guide member 6 of a lengthy shape in which an inner lens part 6c of a flat shape is formed at one end part of a columnar light guide part 6a, as for the light guide part 6a, light of a lengthy shape is irradiated which is made incident from a light-incident part 6b of one end part in the lengthy direction of the light guide part 6a by irradiation of a first light-emitting diode 9, and inside the light guide part 6a, a plurality of hollow parts 6d installed in order to diffusively reflect the light are constituted with prescribed gaps in the lengthy direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technical field of a vehicle lamp provided in a vehicle such as an automobile.

In general, a vehicle lamp is incorporated as a turn lamp (direction indicator, side turn lamp) in a door mirror that protrudes outwardly in the left-right direction in the door of the vehicle (vehicle body), and is independent on the front and rear of the vehicle. It is known that the lamp is lit together with the turn lamp provided in the above to emit light from the outside in the left-right direction of the vehicle toward the front, so as to appeal more strongly to surrounding people.
As such a turn lamp, for example, by providing a plurality of light sources that irradiate in the protruding direction of the door mirror or in the forward direction, the functionality as a turn lamp is achieved while providing high designability with a plurality of scattered lights. What can be demonstrated is known (patent document 1).
On the other hand, a long light guide for irradiating light forward from the protruding end of the door mirror is disposed on the turn lamp, and the rear surface of the light guide in the vehicle traveling direction is disposed. Provided with irregular reflection generating means such as applying warp processing, and a light source that illuminates the protruding direction of the door mirror, enters from one end of the light guide, and radiates long light forward A light source is provided so that both design and functionality as a turn lamp can be achieved with a small number of light sources (Patent Document 2).

JP 2004-276768 A JP 2008-94215 A

  However, although the thing of the said patent document 1 is excellent in designability, since the structure will become complicated and the cost will also become high because much the number of light sources is used, it is low-cost, and functionality and designability Therefore, it is required to provide a vehicular lamp excellent in the above. In addition, in Patent Document 2, a large amount of light is radiated forward from the light guide by the irregular reflection generating means, so that functionality and design can be ensured with a small number of light sources, and cost reduction can be achieved visually. The light is flat, lacks in depth, and is emitted in the form of a long, uniform light. Therefore, there is room for improvement in design, and these should be solved. There are challenges.

The present invention was created for the purpose of solving these problems in view of the above situation, and the invention of claim 1 is a vehicle lamp using a long light guide, The light guide body emits long light by irradiation of a light source provided at one end in the longitudinal direction of the light guide body, and the light guide body has a hollow portion for irregularly reflecting light. The vehicle lamp is provided.
The invention according to claim 2 is the vehicle lamp according to claim 1, wherein a plurality of hollow portions are provided with a predetermined gap in the longitudinal direction.
According to a third aspect of the present invention, in the vehicle lamp according to the first or second aspect, the hollow portion is formed at a central portion in the longitudinal direction of the light guide.
According to a fourth aspect of the present invention, the light guide is the vehicle lamp according to any one of the first to third aspects, wherein the light guide is formed using a translucent resin material.
The invention according to claim 5 is characterized in that the light guide is configured by opposing a pair of halves formed by primary injection and integrating them by secondary injection. 5. The vehicle lamp according to any one of items 4 to 4.
The invention according to claim 6 is the vehicular lamp according to claim 5, wherein the pair of halves are formed using a translucent resin material.
The invention according to claim 7 is the vehicular lamp according to claims 5 and 6, wherein the pair of halves are formed by using a translucent resin material at least one of which is colored.
The invention according to claim 8 is the vehicular lamp according to claim 7, wherein the pair of halves are formed using translucent resin materials colored in different colors.
The invention according to claim 9 is the vehicle lamp according to claim 7, wherein the pair of halves are formed using a translucent resin material colored in the same color.
In the invention of claim 10, the light guide is formed by integrating a pair of front and rear halves, the front half is formed using a translucent resin material, and the rear side The vehicle lamp according to claim 5, wherein the half part is formed using a non-translucent resin material.
The vehicle lamp according to any one of claims 1 to 10, wherein the vehicle lamp is a side turn lamp incorporated in a door mirror.

By setting it as invention of Claim 1, the light from a light guide does not become monotonous, but can radiate | emit the light with the high design property which has a change.
According to the invention of claim 2, it is possible to make a design as if a plurality of light sources are used while using a small number of light sources.
By setting it as invention of Claim 3, the light from a light guide will be in the radiation | emission state with a feeling of depth, and design nature is further improved.
By setting it as invention of Claim 4, clear light can be radiated | emitted and the designability improves.
According to the fifth, sixth, seventh, eighth, ninth, and tenth inventions, light having a change can be emitted when the lamp is turned on, and a light guide with an excellent design can be easily formed when the lamp is turned off.
By setting it as invention of Claim 11, it can be set as the side turn lamp excellent not only in functionality but also in design.

1A and 1B are an overall perspective view of a door mirror and a front view of a turn lamp, respectively. 2A and 2B are a cross-sectional view taken along line XX in FIG. 1A and a vertical cross-sectional view of the turn lamp, respectively. 3A, 3B, and 3C are a plan view, a front view, and a cross-sectional view taken along line XX in FIG. FIGS. 4A and 4B are a longitudinal sectional view of the light guide and a sectional view for explaining the molding process of the light guide, respectively. FIGS. 5A, 5B, 5C, and 5D are a plan view, a front view, a rear view, and a perspective view of the inner assembly, respectively. It is a disassembled perspective view explaining the assembled state of a base housing and an inner assembly.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a door mirror provided on a door of a vehicle. A body 1a constituting the door mirror 1 has an opening formed on the rear side of the vehicle, and a mirror (not shown) is adjusted in the opening. Fits freely. The front part located on the back side of the mirror of the body 1a is formed in a shape that bulges forward, and a turn lamp (side turn lamp) 2 in which the present invention is implemented in a lower part of the bulge part. Are integrated so that light is emitted from the front of the door mirror 1 toward the protruding direction of the door mirror 1 when the turn lamp 2 is turned on.

The left and right door mirrors 1 are provided on the left and right doors of the vehicle. Here, the door mirror 1 provided on the left door of the vehicle shown in FIG. 1 will be described, and the door mirror provided on the right door will be described. The description of 1 is omitted.
The turn lamp 2 incorporated in the door mirror 1 is incorporated in a lower part of the front bulging portion of the body 1a as one assembly part.
The turn lamp 2 covers the base housing 3 and the inner unit 4 housed inside the body 1a (on the mirror side and rear), and further covers the front portion of the inner unit 4 and is externally attached together with the outer peripheral surface of the body 1a. And an outer lens 5 exposed to the surface.

The base housing 3 is integrally formed of a non-translucent resin material, and as shown in FIG. 3, the base housing 3 is formed in a curved shape that is elongated in the left-right direction so as to be installed in a lower part of the door mirror body 1a. And the left end part which becomes the left-right direction outer side of a vehicle body is formed in the shape bent in R shape toward back. The base housing 3 includes a bottom piece 3a and is formed with a recess 3b that opens from the front toward the left. The inner unit 4 is assembled from the front of the recess 3b so that the recess 3b is closed. It is configured to be.
Reference numeral 3c denotes a connection portion with an external power source, and 3d denotes an attachment piece for integrating with the body 1a of the door mirror 1.

On the other hand, as shown in FIGS. 2 and 5, the inner unit 4 has an elongated shape in the left-right direction like the base housing 3, and is formed in a curved shape in which the left end portion is bent in an R shape toward the rear. In the present embodiment, the inner unit 4 is a light guide member 6 having a long solid shape and a light guide section 6a (corresponding to the light guide body of the present invention) having a circular cross section (columnar shape). And an inner member (inner housing) 7 in which the light guide member 6 is integrally incorporated.
The inner member 7 is integrally formed of a non-translucent resin material to give a light blocking function, and connects the pair of upper and lower flange pieces 7a and 7b and the flange pieces 7a and 7b. It is comprised by the integrated piece part 7c. The integrated piece portion 7c is formed in a concave groove shape that deviates rearward from the upper and lower flange piece portions 7a and 7b, and the left end side portion is cut away to form the upper and lower flange piece portions 7a and 7b. A space 7d is formed between them. Reference numeral 7e denotes a support piece that extends from the right ends of the upper and lower flange pieces 7a and 7b and is positioned on the right end side of the integrated piece 7c. The support piece 7e is an inner member. The first light-emitting diode 9 disposed in the light source unit 8 incorporated behind 7 is fixedly supported in a positioning manner.
The inner member 7 may be formed of a translucent resin material. In this case, for example, the inner member 7 is provided with a light blocking function such as, for example, subjecting the entire inner member 7 to a graining process or applying a reflective film to the whole. Preferably, by providing the light blocking function in this way, the light source unit 8 behind the inner member 7 can be made invisible from the outer lens 5 side (front), and the design can be improved. At the same time, light leakage of the first, second, and third light emitting diodes 9, 10, and 11 provided in the light source unit 8 can be prevented.

  Further, as shown in FIGS. 3 and 4, the light guide member 6 uses a transparent member (translucent resin material, for example, acrylic resin, polycarbonate resin, etc.), and has a curved shape based on a molding procedure described later. The cylindrical light guide portion 6a is formed at a position facing forward, and a hemispherical light incident portion 6b is formed at the right end portion of the light guide portion 6a. Further, an inner lens portion 6c is formed at the left end portion of the light guide portion 6a. The inner lens portion 6c is bent in an R shape toward the rear and opposed to the left. The inner lens portion 6c is formed in a flat shape. ing. The light guide member 6 is assembled from the front with respect to the inner member 7, and is configured so that the light guide portion 6a is held in a state where the light guide portion 6a is fitted into the concave groove shape of the integrated piece portion 7c. The portion 6c is configured to be exposed rearward via the space portion 7d and to directly face the base housing 3.

  In addition, the light source unit 8 is configured to be incorporated between the base housing 3 and the inner unit 4. In the present embodiment, the first, second, and third light emission that serve as the light source of the turn lamp 2. The diodes 9, 10, 11 are configured to be integrated by appropriately connecting to a plurality of bus bars 12. Each of the light emitting diodes 9, 10, 11 is a general-purpose one, and the first light emitting diode 9 supported by the support piece 7 e of the inner member 7 is one of the light guide members 6 in the longitudinal direction. It is provided so that it may be located in the one end side (right end side) of the light incident part 6b of this edge part (right end part), and is arrange | positioned so that light may be radiated | emitted toward the light incident part 6b. The second and third light emitting diodes 10 and 11 are provided behind the inner lens portion 6c of the light guide member 6 exposed to the base housing 3 side through the space portion 7d. 6c is arranged so as to radiate light toward the left front side direction and the left side direction.

  The bus bar 12 of the light source unit 8 is provided in a curved shape, and a substrate 13 is provided on the curved inner surface serving as a rear side surface. The first to third light emitting diodes 9, 10, 11 are provided on the substrate 13. Are appropriately wired and necessary electronic components are mounted. The light source unit 8 is configured to be held by the inner unit 4 (inner member 7), and the base housing 3 and the outer lens are used as an inner assembly in which the light source unit 8 is assembled in the inner unit 4. It is comprised so that it may be integrated between the parts 5. At this time, the light source unit 8 is provided with an intermediate member 14 so as to be integrated with the substrate 13, and the front end edge portion of the intermediate member 14 is sandwiched between the abutting portions of the base housing 3 and the outer lens 5. It is comprised so that it may be integrated. Accordingly, the inner unit 4 and the light source unit 8 are configured to be held by the base housing 3 and the outer lens unit 5 without rattling. Reference numeral 14 a denotes a terminal for connecting the substrate 13 and an external power source, and is configured to pass through the intermediate member 14 in the vertical direction and be installed in the connection portion 3 c of the base housing 3.

  On the other hand, a plurality of spherical hollow portions 6d are formed in parallel in the left-right direction in the light guide portion 6a formed in the cylindrical shape of the light guide member 6. These spherical hollow portions 6d are formed so that their center points are located on the center line (cylindrical center line) of the light guide portion 6a. It is formed in a state of being arranged in a line with a predetermined gap in the direction. As a result, the refractive index of light is different between the solid portion, which is a portion other than the hollow portion 6d made of the resin material of the light guide portion 6a, and the hollow portion 6d. When light from the light emitting diode 9 is incident, irregular reflection occurs in the hollow portion 6d, and the spherical hollow portion 6d emits light that is significantly brighter than the solid portion. In this way, diffuse reflection occurs in each hollow portion 6d, and the light guide portion 6a emits scattered bright light, as if a plurality of light sources are provided in parallel in the left-right direction. The light guide section 6a is configured not to be simply a long light but to be a light emission state having a change, so that the design can be enhanced.

Also, irregular reflection means is formed on the inner lens portion 6c of the light guide member 6, and when the second and third light emitting diodes 10 and 11 enter from the rear surface 6e of the inner lens portion 6c, the light is irregularly reflected. In this state, the illuminance that satisfies the legal requirements for the turn lamp 2 can be reliably radiated. Note that the irregular reflection means of the present embodiment is configured to generate irregular reflection by forming a plurality of irregular surfaces on the rear surface 6e.
As a result, the light guide member 6 can change the radiation state of the light guide portion 6a due to the irregular reflection occurring in the hollow portion 6d, thereby improving the design, and the hollow portion 6d can be improved in the design of the light guide portion 6a. Since it is provided at the central portion and is irregularly reflected at the center portion, a sense of depth can be provided to the light from the light guide portion 6a to enhance the design, and the inner lens portion 6c is subjected to irregularly reflected light. Can be radiated from the front toward the left, and the function as the turn lamp 2 can be surely exhibited.
Incidentally, the light incident portion 6b of the light guide member 6 has a hemispherical shape, and thus light from the first light emitting diode 9 is scattered toward the inner lens portion 6c from the light guide portion 6a. Guided and configured to reduce light attenuation.

Here, the light guide member 6 of the present embodiment is an injection-molded body, and includes first and second molds as an injection molding apparatus for molding the light guide member 6, and one mold is the other. The apparatus is molded in the following procedure using an apparatus capable of moving in and out of contact with the mold surface of the mold.
By the first injection in the first step, front and rear half portions (corresponding to a half-divided body of the present invention) 15 and 16 which are the front half portion and the rear half portion of the light guide member 6 are respectively formed. The front half portion 15 is molded into a structure in which a light guide front half portion equivalent portion 15a and an inner lens equivalent portion 15b are formed at the left end of the light guide portion front half equivalent portion 15a. The portion 16 is formed as a portion corresponding to the rear side opposite portion of the light guide portion. The front and rear corresponding portions 15a and 16 of the light guide portion are opposed to each other on the opposing abutting surfaces, and are formed with concave portions 15c and 16a for bonding located at the outer peripheral edge portion, and a plurality of hemispherical shapes located at the central portion. The hollow equivalent recesses 15d and 16b are formed.
In the subsequent second step, the first and second molds are separated from each other, and the first and second molds move away from each other while holding the front and rear halves 15 and 16 respectively. In the third step, one mold moves in parallel so that the front and rear equivalent portions 15a, 16 are in a positional relationship facing each other. In the fourth step, the first and second molds are moved so as to abut against each other, and the front light guide portion and the rear equivalent portion 15a, 16 are connected to the recesses 15c, 16a for joining and the hollow equivalent recess 15d. , 16b abut each other in a state of alignment, and the resin material 17 is secondarily injected into the joining recesses 15c, 16a of these abutting parts to join the front and rear half parts 15, 16 together, Then, the first and second molds are separated from each other, and the light guide member 6 as a molded body is taken out.

  By doing so, the light guide member 6 in which a plurality of spherical hollow portions 6d are formed inside the light guide portion 6a and the inner lens 6c is formed at the left end portion can be easily formed. It is comprised so that it can shape | mold with sufficient position accuracy. The light guide member 6 of the present embodiment is colorless as a whole by making the resin material used in the primary and secondary injections in the injection molding process uncolored (colorless) translucent resin material, and It is formed to have translucency. In this case, when the light guide portion 6a emits light by the light of the first light emitting diode 9 from the light incident portion 6b, the light irregularly reflected in the hollow portion 6d is reflected on the integrated piece portion 7c of the inner member 7. As a result, the depth can be further enhanced. Further, when the light guide member 6 is formed using a translucent resin material for both the front and rear half portions 15 and 16, light for preventing light leakage on the rear surface that is the curved inner portion of the light guide portion 6a. The shading process may be performed as a blocking means. In such a case, light leakage from the light guide section 6a is prevented and light is further prevented from being attenuated on the left end side, so that the light guide section 6a is solid. The radiation state in the portion and the irregular reflection state in the hollow portion 6d can be made uniform in the longitudinal direction.

The turn lamp 2 is configured by arranging an outer lens 5 so as to cover the front of the inner unit 4 and integrating the outer peripheral edge of the base housing 3 and the outer peripheral edge of the outer lens 5 in an abutting shape. However, the outer lens 5 is integrally formed of a translucent resin material, and the first light emitting diode 9 supported by the support piece 7e formed on the inner member 7 of the inner unit 4 is disposed. The light source facing portion 5a that faces the first light emitting diode 9 is formed so as to be close to the first light emitting diode 9 through the step portion 5b. Furthermore, the light source facing part 5a is provided with a light blocking means, and the light emitted from the first light emitting diode 9 is prevented from being emitted (leaked light) to the outside through the light source facing part 5a, thereby improving efficiency. It is comprised so that the light guide member 6 can be irradiated well.
Incidentally, the light source facing portion 5a of the present embodiment has light blocking means formed by squeezing, but as the light blocking means, a non-translucent seal is attached, a reflective film, etc. It is also possible to use other light blocking means such as forming a non-light-transmitting film.
By doing in this way, it can further prevent that the light radiated | emitted from the 1st light emitting diode 9 attenuate | damps in the left end side of the light guide part 6a, and it is light uniformly in the left-right direction whole region of the light guide part 6a. Is radiated to improve visibility, and light having excellent design as if a plurality of lights are scattered by being diffusely reflected in the hollow portion 6d. ing. Furthermore, the light source facing portion 5a is configured to be covered with the body 1a of the door mirror 1, thereby further preventing light from leaking from the light source facing portion 5a to the outside.

  In the embodiment configured as described above, the turn lamp 2 incorporated in the door mirror 1 receives light from the first light emitting diode 9 with respect to the light guide portion 6a of the light guide member 6, and the inner lens portion 6c. On the other hand, the light from the second and third light emitting diodes 10 and 11 is incident, and the light guide 6a emits long light for improving the design, and is emitted from the inner lens 6c. In order to satisfy legal requirements, light is emitted outward in the left-right direction. In this case, the light guide portion 6a that emits light in a long shape is provided with hollow portions 6d, and these hollow portions 6d are irregularly reflected because their refractive indexes are different from those of the solid portion made of resin. As a result, the light becomes brighter than the solid part, the light from the light guide part 6a changes, and the light does not become monotonous and can have high design. Accordingly, the light guide member 6 (the light guide portion 6a) is turned on by using a small number of light sources (first, second, and third light emitting diodes 9, 10, and 11), but the functionality is improved. It can be set as the turn lamp 2 which was excellent and was excellent in the design property.

  As described above, in the embodiment of the present invention, the hollow portion 6d is provided in the light guide portion 6a, and the light guide portion 6a is given variability by the irregular reflection of the hollow portion 6d. In the present embodiment, since a plurality of hollow portions 6d are provided in parallel in the longitudinal direction in the light guide portion 6a, bright portions scattered in the light from the light guide portion 6a are formed, Although a small number of light sources (first, second, and third light emitting diodes 9, 10, and 11) are used, the design can be made as if a plurality of light sources are used.

  Moreover, in this thing, since the hollow part 6d is located in the center part of the light guide part 6a, the irregular reflection in the hollow part 6d is performed inside the light guide part 6a, and it becomes a radiation state with a feeling of depth. , The design can be further enhanced.

  And the light guide member 6 forms the front and rear halves 15 and 16 by the primary injection of the injection molding, and moves the front of the first and second molds in parallel to perform the secondary injection. Since the rear half portions 15 and 16 are joined and formed, they can be easily formed and the hollow portion 6d can be formed with high accuracy.

Of course, the present invention is not limited to the embodiment described above, and the shape of the hollow body is not limited to a spherical shape, and can be appropriately shaped such as a horizontally long shape, a vertically long shape, The number and arrangement state are not limited.
Moreover, as the translucent resin material constituting the light guide, a colored translucent resin material can also be used.
Furthermore, when the light guide is formed by integrally forming a pair of injection-molded halves, the halves are formed using a translucent resin material colored in the same color. It can be formed in any combination, such as those formed using translucent resin materials colored in different colors, one formed using a translucent resin material that is colored and the other is not colored. With this, it becomes possible to make a turn lamp with various and various color variations.
Furthermore, in the case where the light guide is injection-molded as a pair of front and rear halves and these are integrally formed, the front half as a halved body is uncolored or colored translucent resin On the other hand, the rear half can be formed of a non-translucent resin material and a resin material having an arbitrary color. In this case, the rear half functions as light blocking means, and light incident on the front half when the light source is turned on can be prevented from leaking. Further, when the light is turned off, the color of the rear half is exposed through the front half, and there is an advantage that an accent can be given to the turn lamp.

  The present invention can be used as a side turn lamp or the like incorporated in a door mirror provided in a vehicle.

DESCRIPTION OF SYMBOLS 1 Door mirror 2 Turn lamp 3 Base housing 4 Inner unit 6 Light guide member 6a Light guide part 6b Light incident part 6c Inner lens part 6d Hollow part 7 Inner member 8 Light source unit 9 First light emitting diode 15 Front half part 15a Light guide part front side Half portion equivalent portion 15d Hollow portion equivalent concave portion 16 Rear half portion 16b Hollow portion equivalent concave portion

Claims (11)

In the vehicular lamp using a long light guide, the light guide emits long light by irradiation of a light source provided at one end in the long direction of the light guide. A vehicular lamp, wherein the light guide is provided with a hollow portion for irregularly reflecting light. The vehicular lamp according to claim 1, wherein a plurality of hollow portions are provided with a predetermined gap in the longitudinal direction. The vehicular lamp according to claim 1, wherein the hollow portion is formed at a central portion in a longitudinal direction of the light guide. 4. The vehicle lamp according to claim 1, wherein the light guide is formed using a translucent resin material. 5. 5. The light guide is configured by opposing a pair of halves formed by primary injection and integrating them by secondary injection. 6. The vehicle lamp described in 1. The vehicular lamp according to claim 5, wherein the pair of halves are formed using a translucent resin material. The vehicular lamp according to claim 5 or 6, wherein the pair of halves are formed by using a translucent resin material in which at least one is colored. 8. The vehicular lamp according to claim 7, wherein the pair of halves are formed using translucent resin materials colored in different colors. The vehicular lamp according to claim 7, wherein the pair of halves are formed using a translucent resin material colored in the same color. The light guide is formed by integrating a pair of front and rear divided halves, the front half is formed using a translucent resin material, and the rear half is non-translucent. The vehicular lamp according to claim 5, wherein the vehicular lamp is formed using a conductive resin material. The vehicle lamp according to any one of claims 1 to 10, wherein the vehicle lamp is a side turn lamp incorporated in a door mirror.

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