• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A light guide (10) of a vehicle lamp comprises: a first light guiding body (11) which guides the incident light from a fixed side light source, and a second light guiding body (21). ) which guides the incident light from a moving lateral light source. The first light guiding body (11) is shaped as a twisted arc. A reflecting portion (35) is formed on the rear surface of each of the first and second light guiding bodies (11, 21) to reflect the incident light to the front surface and a transmitting portion is formed on the front surface to emit the reflected light. The first and second side surfaces (33,34) of each light guide body have a curved surface that is indicated by a curved line on the cross section of the light guide body. A lateral step is formed on the first side surface of the first light guiding body to reflect the incident light toward the second side surface.
    公开号:FR3027095A1
    申请号:FR1559530
    申请日:2015-10-07
    公开日:2016-04-15
    发明作者:Yuho Tagawa
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] 1 CROSS REFERENCES TO PARALLEL APPLICATIONS [0001] This application is based on, and claims the priority of, Japanese Patent Application No. 2014-208875, filed October 10, 2014, with the Japan Patent Office.
    [0002] TECHNICAL FIELD [0002] The present disclosure relates to a lighting light guide including a strip-shaped light guiding body.
    [0003] BACKGROUND [0003] A lighting light guide is conventionally known in which a plate-shaped or strip-shaped light guiding body is used to increase the light-emitting surface of a light-emitting light. lamp. Japanese Patent No. 5210061, for example, discloses a light guide in which a plate-shaped light guiding body is provided inside a lamp cover so as to cause the incidence of the light of the lamp. a light source from an end surface of the light guide body and thereby guide the incident light in the longitudinal direction to be emitted outwardly from its entire surface. SUMMARY [0004] According to the conventional light guide, however, there is a problem that, since the side surfaces of the light guide body are flat planes, part of the light reflected internally, or by the front surface either by the rear surface of the light guiding body, leaking outwardly from the side surfaces. In particular, there is a problem that when the light guiding body is twisted or curved, the amount of light leaking from the side surfaces increases. Accordingly, an object of the present disclosure is to provide a lighting light guide capable of increasing the amount of light distributed by a transmitting portion by suppressing light leakage from a side surface of the light. a light guiding body. To solve the problems described above, the present disclosure provides a lighting light guide as follows. (1) A lighting light guide including a strip-shaped light guiding body configured to guide the incident light in the longitudinal direction. The light guiding body has a front surface and a rear surface that are opposite each other in the thickness direction, and two side surfaces that are opposed to each other in the direction of the thickness. the width. A reflecting portion configured to reflect the incident light to the front surface side 10 is formed on the rear surface, a transmitting portion configured to emit the reflected light is formed on the front surface, and each of the two side surfaces has a surface curved which is indicated as a curved line on a cross-section whose normal corresponds to the longitudinal direction of the light guiding body. (2) The illumination light guide described above, wherein the light guide body is shaped as a twisted band, and an incident portion is formed at an end of the guide body of light. [0008] (3) The illuminating light guide described above, wherein the light guiding body is shaped according to an arcuate shape which widens as one moves away from the impact. [0009] (4) The illumination light guide described above, wherein the two side surfaces comprise a first side surface that extends outwardly from the arc shape and a second side surface that extends inwardly of the arc shape, and a lateral step configured to reflect the incident light to the second side surface is formed on the first side surface. [0010] (5) The illumination light guide described above, wherein an incident step configured to diffuse the incident light in the direction of the thickness of the light guide body is formed on a surface end of the incidence part. According to the illumination light guide according to the present description, since the two side surfaces of the light guide body are formed to include a curved surface, the light which is about to exit towards the The exterior of the side surfaces 3027095 is diffused from the curved surface so as to return the light to the interior of the light guiding body. In particular, when the light guiding body is twisted or curved in the form of an arc, the amount of light leaking from the side surfaces can be reduced, which can increase the amount of light distributed by the transmitting portion. The above summary is only explanatory and is in no way intended to be limiting. In addition to the aspects, embodiments and explanatory properties described above, other aspects, embodiments and properties will become apparent with reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be well understood and its advantages will be better understood on reading the following detailed description. The description refers to the following drawings, which are given by way of example. FIG. 1 is a front view illustrating a vehicle lamp according to an exemplary embodiment of the present description. FIG. 2 is a perspective view illustrating a lighting light guide of the vehicle lamp of FIG. 1. FIG. 3 is a sectional view along the line AA illustrating the cross-sectional shape. each of the first and second light guiding bodies. Figure 4 is an enlarged perspective view of a portion B of Figure 2, illustrating a connecting portion between the first and second light guide bodies. FIG. 5 is a sectional view illustrating an optical action of a reflection portion of each of the first and second light guide bodies. Figure 6 is a sectional view illustrating an optical action of the lateral steps of the first light guiding body. Fig. 7 is an enlarged sectional view of a portion C of Fig. 2 illustrating incidence steps of the first light guide body. FIG. 8 is an enlarged sectional view of a portion D of FIG. 2 illustrating incidence steps of the second light guiding body.
    [0004] DETAILED DESCRIPTION [0021] In the detailed description which follows, reference is made to the accompanying drawings constituting a part thereof. The explanatory embodiments described in the detailed description, the drawings and the claims are not intended to be limiting. Other embodiments may be used and other modifications may be made without departing from the spirit or scope of the object presented herein. An exemplary embodiment embodying the present description in a vehicle lamp will be described hereinafter with reference to the drawings. A pair of left and right vehicle lamps 1 15 shown in FIG. 1 is installed on the rear part of the body of a vehicle 3 with combination tail lights 2. Each of the left and right vehicle lamps 1 has a side lamp fixed lA attached to the rear panel of the vehicle body and a movable side lamp 1B attached to the rear door panel 5 and is configured to have a design in which the fixed side lamp 1A and the movable side lamp 1B are continuous in the direction horizontal in a state in which the rear door panel 5 is closed. On the other hand, as illustrated in FIG. 3, in each of the lamps 1A, 1B, a lamp chamber 9 is formed between a body 7 and a light transmission cover 8. As illustrated in FIG. 2 each of the left and right vehicle lamps 1 is equipped with a lighting light guide 10 which forms a strip-like light emission line at the time of illumination. The illumination light guide 10 of the present embodiment has a first strip-shaped light guiding body 11 configured to guide the incident light from a fixed side light source 6A in the longitudinal direction, and a second strip-shaped light guiding body 21 configured to guide the incident light from a moving-side light source 6B in the longitudinal direction. The first and second light guiding bodies 11, 21 are respectively installed in the 3027095 5 lamp chambers 9 of the lamps 1A, 1B. The first light guiding body 11 has an incident portion 12 at its upper end and is shaped as a twisted arc which is widened when moving away from the incident portion 12. The second Light guiding body 21 has an incident portion 22 at the end on a side opposite the first light guiding body 11 and is shaped in linear form in which the respective portions have the same width. The first and second light guiding bodies 11, 21 are connected to each other so that the end surfaces at the opposite faces to the bearing portions 12, 22, are rotated. towards each other on either side of the boundary between the vehicle body panel 4 and the door panel 5, and embossed portions 14, 24 are respectively formed on the outer circumferences of the connecting portions 15 first and second light guide bodies 11, 21. In the incidence portion 12 of the first light guide body 11, pitch steps 13 are formed on its end surface and an embossed portion 15 is formed. on its outer circumferential surface. Similarly, in the bearing portion 22 of the second light guiding body 21, bearing steps 23 are formed on its end surface and an embossed portion 25 is formed on its outer circumferential surface. In addition, by means of the embossed portions 14, 15, 24, 25, the spot illumination in the opposite ends of the light guide bodies 11, 21 is attenuated. As illustrated in FIG. 7, the incidence steps 13 of the first light guiding body 11 are cylindrical steps, in which the boundary between the incidence steps 13 extends in the width direction. of the light guide body 11. The incidence steps 13 diffuse the incident light from the fixed side light source 6A in the thickness direction of the light guide body 11. As illustrated in FIG. the incidence steps 23 of the second light guiding body 21 are respectively in the form of a prism, in which the boundary between each pair of adjacent incidence steps extends in the direction of the thickness of the body. Light guidance 11. Incidence steps 23 diffuse incident light from moving side light sources 6B 3027095 6 in the width direction of the light guiding body 21. LEDs (light-emitting diodes) They are used for the light sources 6A, 6B, and the LED-specific light lines are eliminated by the light scattering effect of the incidence steps 13, 23. On the other hand, the number of LEDs is not particularly limited and discharge or filament lamps can also be used instead of LEDs. As illustrated in FIGS. 3 and 4, each of the first and second light guiding bodies 11, 21 has a front surface 31 and a rear surface 32 which are opposed to each other in the direction thickness, and two side surfaces 33, 34, which are opposite one another in the width direction. Each of the first and second light guiding bodies 11, 21 is entirely oval-shaped in cross-section from a transparent synthetic resin. A reflection portion 35 is formed on the rear surface 32 to reflect the incident light to the front surface 31, and a transmitting portion 36 is formed on the front surface 31 to emit the reflected light to the outside. Each of the two side surfaces 33, 34 has a curved surface 37 which is indicated by a curved line 20 on the cross-section of each of the light guide bodies 11, 21 (a cross-section whose normal corresponds to the longitudinal direction of the light guiding body 11 or 21). The side surfaces 33, 34 act by internally reflecting the incident light by means of the curved surfaces 37 so that the incident light is diffused inwardly of the light guiding bodies 11, 21. on the other hand, the front surface 31 and the rear surface 32 are respectively indicated by straight lines on the cross-sections of the light guide bodies 11, 21. As shown in FIGS. 4 and 5, the reflection portions 35 have a plurality of prisms extending in the width direction of the light guiding bodies 11, 21. In place of the prisms, the reflection portions 35 may be formed of an aluminum film by vapor deposition. As illustrated in FIGS. 4 and 6, on the lower side surface 33 of the first light guide body 11, i.e., on a first side surface 33 extending outside the guide body 11 which is shaped in the form of an arc, lateral rungs 38 are shaped like a sawtooth. The lateral rungs 38 are formed on the lower end portion of the first twisted light guiding body 11 and reflect the incident light toward the second side surface 34 which extends within the arc shape, eliminating thus a dark portion of the lower end portion of the second side surface 34. On the other hand, the transmitting portion 36 of the first light guiding body 11 is formed by a smooth surface which is twisted as a whole. According to the illumination light guide 10 of the present exemplary embodiment configured as described above, since the side surfaces 33, 34, first and second light guide bodies 11, 21 are formed. As curved surfaces 37, the light that is about to exit outward from the side surfaces 33, 34, can be diffused by the curved surfaces 37 so that light returns to the interior of the guide bodies. 11, 21. Accordingly, even if the first light guiding body 11 is molded into a twisted or curved band in the form of an arc depending on the shape of the rear panel of the vehicle body 4, the amount As a result, the amount of light leaking from the side surfaces 33, 34 can be reduced and thus the amount of light distributed by the transmitting portion 36 can be increased. In particular, since the lateral rungs 38 are formed on the first lateral surface 33 of the first light guiding body 11, a dark part in the vicinity of the lower end portion of the second lateral surface in the part of emission 36 of the first light guiding body 11 can be eliminated by the light reflected by the rungs 38, so that the respective portions of the first light guiding body 11 can emit light uniformly. Moreover, since the incidence steps 13, 23 attenuate the lines of light of the first and second light guiding bodies 11, 21, and at the same time, the embossed portions 14, 15, 24, 25 prevent By spotlighting the respective parts of the light guiding bodies 11, 21, light emission can be effected so that the whole of the vehicle lamp 1 has a good appearance at the moment of illumination. In the exemplary embodiment described above, the side surfaces 33, 34, of the light guiding bodies 11, 21, are shaped as outwardly inflated curved surfaces 37. However, the side surfaces 33, 34 may be shaped in the opposite direction as curved inwardly recessed surfaces. Further, in the exemplary embodiment described above, the incidence steps 13, 23, are formed in one end of each of the light guiding bodies 11, 21. Given the length or As the shape of each of the light guiding bodies, the incidence steps 10 may be formed on both ends of each of the light guiding bodies with a light source. It will be understood from the foregoing that various embodiments of the present description have been described herein for purposes of explanation and that various modifications may be made without departing from the scope of the present disclosure. . Consequently, the various embodiments described here are not intended to be limiting.
    权利要求:
    Claims (5)
    [0001]
    REVENDICATIONS1. A lighting light guide (10) characterized by comprising: a strip-shaped light guide body (11) configured to guide incident light in the longitudinal direction, the light guide body (11); ) including a front surface (31) and a rear surface (32) which are opposite each other in the thickness direction, and two side surfaces (33, 34) which are opposed to one another other in the width direction, wherein a reflecting portion (35) configured to reflect the incident light to the front surface side is formed on the rear surface (32), a transmitting portion (26) configured to the reflected light is formed on the front surface (31) and each of the two side surfaces (33, 34) has a curved surface (37) which is indicated as a curved line on a cross-section whose normal corresponds to the longitudinal direction of the guide body of light (11).
    [0002]
    The illuminating light guide (10) according to claim 1, wherein the light guide body (11) is shaped as a twisted band, and an incidence portion (12) is formed at one end of the light guiding body (11).
    [0003]
    The illumination light guide (10) according to claim 2, wherein the light guiding body (11) is shaped in an arcuate shape that widens as one moves away from the impact.
    [0004]
    The illumination light guide (10) according to claim 3, wherein the two side surfaces (33, 34) comprise a first side surface (33) extending outwardly from the arc shape and a second lateral surface (34) extending inwardly of the arc shape, and a lateral step configured to reflect the incident light to the second lateral surface (34) is formed on the first lateral surface (33) .
    [0005]
    The illumination light guide (10) according to any one of claims 2 to 4, wherein an incident step configured to diffuse the incident light in the direction of the thickness of the light guiding body 3027095 (11) is formed on an end surface of the bearing portion.
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    同族专利:
    公开号 | 公开日
    US20160103269A1|2016-04-14|
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    CN105511007A|2016-04-20|
    FR3027095B1|2019-11-22|
    JP2016081598A|2016-05-16|
    US9784901B2|2017-10-10|
    DE102015218709A1|2016-04-14|
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    法律状态:
    2016-09-19| PLFP| Fee payment|Year of fee payment: 2 |
    2017-09-01| PLSC| Search report ready|Effective date: 20170901 |
    2017-09-18| PLFP| Fee payment|Year of fee payment: 3 |
    2018-09-13| PLFP| Fee payment|Year of fee payment: 4 |
    2019-09-13| PLFP| Fee payment|Year of fee payment: 5 |
    2021-07-09| ST| Notification of lapse|Effective date: 20210605 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014208875A|JP6511244B2|2014-10-10|2014-10-10|Lighting light guide|
    JP2014208875|2014-10-10|
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