JP2012190761A - Vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp easy to mold, of reduced cost, and corresponding to complicated design forms, while being equipped with a first light guide body and second light guide bodies with different light guide directions.SOLUTION: The first light guide body 30 and the second light guide bodies 40a, 40b, 40c with light guide directions different from each other are installed, and a first inner face reflecting part 34 is formed at a site opposed to a base end part 42 of each second light guide body 40a, 40b, 40c on an outside face of the first light guide body 30. As the first inner face reflecting part 34 is formed selectively at a site where light-source light should be guided, the light-source light can be surely guided to each second light guide body 40a, 40b, 40c on the basis of the first light guide body 30. Further, the second light guide bodies 40a, 40b, 40 can take on complicated forms since they are divided into a plurality of bodies, so that they give birth to various light emission modes not limited to plane light emission as in the case of a conventional structure. Moreover, the first inner face reflecting part 34, since it is formed at an outside face of the first light guide body 30, is easy to form, and the light guide member 10 is easy to mold all the more.

Description

  The present invention relates to a vehicular lamp in which a light guide member that emits light by light guide is disposed in a lamp chamber, and in particular, includes a first light guide (or light guide) having a light source light incident portion and a light emitting portion. A first light reflector having a second light guide (or a light guide) and formed from light source light incident from the first light guide and guided into the first light guide in the first light guide The vehicle is provided with a light guide member that is first reflected and guided to the inside of the second light guide, second reflected by the second reflector formed on the second light guide, and emitted outward from the lamp. It relates to a lamp.

  As this type of vehicle lamp, as shown in Patent Document 1, light source light is applied to a synthetic resin plate-shaped light guide member including a first light guide portion and a second light guide portion whose light guide directions are orthogonal to each other. The first inner surface in which the light is incident from the end of the first light guide portion and guided into the first light guide portion, and the light guide is cut through a part of the first light guide portion into a triangular prism shape to form a recess. The light is first reflected in the direction of the second light guide by the reflector, guided into the second light guide, and second reflected by the second inner surface reflector formed in the second light guide, to the outside of the lamp (lamp) There is one that causes the second light guide unit to emit light by emitting the light forward.

German Patent No. 197 56 596 (Summary, FIGS. 2 and 3)

  In patent document 1, since the 1st inner surface reflection part in a 1st light guide part is comprised through the inside of a plate-shaped light guide member, shaping | molding of a reflective surface is difficult, and there existed a problem that product cost became so much. It was. In recent years, with the diversification of the design of vehicle lamps, various shape variations are required for the light guide member disposed in the lamp chamber. Since the entire second light guide emits light in a planar shape, the design shape has a limit.

  The present invention has been made in view of the problems of the prior art described above, and its purpose is to include a first light guide body and a second light guide body with different light guide directions, easy to mold, and inexpensive. It is providing the vehicle lamp provided with the light guide member corresponding also to a complicated design shape.

  In order to achieve the above object, in the vehicular lamp according to claim 1, the first light guide body extending in a columnar shape and extending in a direction intersecting the light guide direction of the first light guide body, A vehicle lamp comprising: a second light guide having a light direction different from that of the first light guide; and a light source disposed at a position facing a light incident end of the first light guide, A plurality of the second light guides are provided, and a first inner surface reflection portion is formed on the outer surface of the first light guide opposite to the base end of each second light guide, and the light The light source light incident from the incident end and guided into the first light guide is reflected by the first inner surface reflection portion of the first light guide and second from the base end of the second light guide. The light guide was guided into the light guide, reflected by the second inner surface reflection portion formed on the second light guide, and emitted from the second light guide to the outside of the lamp.

  (Operation) A plurality of second light guides which are light emitters, and a first inner surface reflection portion is formed in the first light guide at a location facing the base end of the second light guide. Therefore, the light source light incident from the first light guide is guided through the first light guide while repeating total reflection, and directed to the base end of each second light guide by the first inner surface reflection portion. The first light is selectively reflected and reliably enters the second light guide from each second light guide base end. That is, by selectively forming the first inner surface reflection portion at a location where light source light is to be guided, the light source light is reliably guided to each second light guide body (plural bodies) from the first light guide body. Is done.

  And since the 2nd light guide is divided | segmented into multiple bodies, it can take a complicated form and can produce the various light emission forms which are not limited to surface light emission like the conventional structure.

  According to a second aspect of the present invention, in the vehicular lamp according to the first aspect, the second light guide is provided so as to be separated from each other in the axial direction of the first light guide, and the first light guide. It was comprised so that it might extend so that a mutual extension direction might correspond to the circumferential direction.

  (Operation) Corresponding to the second light guides (base ends thereof) whose extending directions coincide with the circumferential direction of the first light guide, the first inner surface reflection part also has the first light guide axis. Since the light source light is formed in a line at a predetermined interval in the direction, the light source light is selectively first reflected toward the corresponding second light guide by the first inner surface reflection portion of the first light guide, and the second light guide. The body emits light in a strip shape.

  According to a third aspect of the present invention, in the vehicular lamp according to the first aspect, the second light guides are provided so as to be separated from each other in the axial direction of the first light guide, and the extending directions of the second light guides are The first light guide is configured so as to extend in a circumferential direction so as not to overlap.

  (Operation) In correspondence with the second light guide (the base end portion) of which the extending direction is shifted in the circumferential direction of the first light guide and the respective light guide directions are different, Since the first light guide body is shifted in the circumferential direction of the first light guide at predetermined intervals in the axial direction of the light guide, the light source light is selected toward the corresponding second light guide at the first inner surface reflection portion of the first light guide. The first light is reflected first, and the second light guide emits light in a strip shape with a perspective in the depth direction of the lamp chamber.

  According to a fourth aspect of the present invention, in the vehicular lamp according to any one of the first to third aspects, the two first light guides are provided and separated from each other, and the second light guide is the two light bodies. The light from the second light source different from the light source passes through the space between the second light guide and the second light guide so as to connect the first light guide. It was configured to emit outward.

  (Operation) Since the plurality of second light guides cross each other between the two first light guides, both end portions of each second light guide are held by the first light guides. The strength of the light guide member is ensured.

  Moreover, since the reflected light by the first inner surface reflecting portion is incident from both ends of the second light guide, the second light guide emits light uniformly.

  Furthermore, the light from the second light source, which is another light source, passes through the space (gap) between the second light guide and the second light guide and is emitted outward from the lamp. Therefore, the light emission obtained by the second light source passes through the light emission gap obtained by the second light guide. Therefore, since the light guide member and the light emitting region of the second light source overlap each other when the lamp is viewed from the front, the gap between the light guide members can be used. For example, the second light guide is used as a stop lamp, It can be used as a tail lamp, or the second light guide portion emits white light and the gap emits red light.

  According to a fifth aspect of the present invention, in the vehicular lamp according to any one of the first to fourth aspects, the first light guide and the second light guide are configured as an integrally molded body made of a translucent synthetic resin.

  (Operation) By making the first light guide and the second light guide into an integrally formed body, both (the entire light guide member) can be formed as a single member.

  As is apparent from the above description, according to the vehicular lamp according to the first aspect, the light source light can be efficiently guided even if the light guide member has a complicated shape. In addition, since the plurality of second light guides can emit light in a free shape with the first light guide as a base point, the design variation of the second light guide (light emitter) provides a degree of freedom.

  Moreover, since the 1st inner surface reflection part in a 1st light guide is formed without hollowing out the inside of a light guide like the conventional structure, formation of a 1st reflection part becomes easy and it is cheap by that much. A light guide member can be provided.

  According to the second aspect of the present invention, the first inner surface reflection portion is selectively formed in the axial direction of the first light guide, and the light guide member having a complicated shape is obtained by controlling the location where the light guide is to be taken out. Can efficiently guide light and reliably emit light.

  According to the third aspect, the first inner surface reflection portion is selectively formed not only in the axial direction of the first light guide but also in the circumferential direction, and the location where the light guide is to be taken out and the direction in which the light is taken out are controlled. In addition, the design variation of the second light guide body further increases the degree of freedom, and even a light guide member having a three-dimensionally complicated shape can efficiently guide light and emit light reliably.

According to the fourth aspect, the strength of the light guide member having a complicated shape is ensured, and uniform light emission is obtained. In addition, by effectively using the interior space of the lamp, it is possible to realize a lamp that can emit light having a plurality of functions in a space-saving manner. In addition, when it is assembled in the lamp chamber, the first light guide and the second light guide do not need to be aligned, so that the arrangement becomes easy.

1 is a front view of a vehicular lamp in which a tail and stop lamp according to a first embodiment of the present invention is housed. FIG. 2 is a horizontal sectional view of the same lamp (a sectional view taken along line II-II shown in FIG. 1). It is a longitudinal cross-sectional view (cross-sectional view along line III-III shown in FIG. 1) of the lamp. It is a front view of the vehicle lamp in which the tail and stop lamp which concerns on the 2nd Example of this invention was accommodated. It is a longitudinal cross-sectional view (cross-sectional view in alignment with line VI-VI shown in FIG. 5) of the lamp. It is a front view of the vehicle lamp with which the tail and stop lamp which concerns on 3rd Example of this invention was accommodated.

  Hereinafter, embodiments of the present invention will be described based on examples.

  First Embodiment FIGS. 1 to 3 show an embodiment in which the first embodiment of the present invention is applied to a tail and stop lamp. FIG. 1 shows a tail and stop according to the first embodiment of the present invention. 2 is a front view of the vehicular lamp in which the stop lamp is accommodated, FIG. 2 is a horizontal sectional view of the lamp (cross-sectional view taken along line II-II shown in FIG. 1), and FIG. 3 is a sectional view taken along line III-III). In addition, in said figure, since LED which is a light source becomes a structure which is not visually recognized by lamp fixture front view by the extension etc. which are not shown in figure, it represents with a broken line. Moreover, the arrow in FIG. 2 shows a part of the state of light.

  In these drawings, the vehicular lamp 1 is a rear combination lamp disposed on the rear side of the vehicle. Reference symbol S denotes a lamp chamber of the lamp 1 defined by the lamp body 2 and the transparent outer cover 4. The front opening of the lamp body 2, the outer cover 4, and the inside of the lamp chamber S follow the streamline shape of the vehicle body, go around from the center of the vehicle to the side of the vehicle, and further around from the top to the bottom of the vehicle. It is formed in a complicated curved shape. Above the lamp chamber S, eight light emitters, each of which is a pair of a light source LED and a bowl-shaped reflector, are arranged in series, the left five being the turn signal lamp A and the left three. It functions as a backup lamp B. Below the lamp chamber S, a tail and stop lamp C made of a synthetic resin light guide member 10 according to this embodiment is disposed.

  The light guide member 10 is formed by integrally molding an elongated cylindrical first light guide 30 made of a translucent synthetic resin and three second light guides 40a, 40b, and 40c that are also cylindrical. Optical member. The first light guide 30 extends in the vehicle vertical direction near the left side of the lamp chamber, and the second light guides 40a, 40b, and 40c are arranged in a form extending from the first light guide 30 in the vehicle left-right direction.

  In the first light guide 30, the LED 20 that is the light source of the light guide member 10 is disposed at a position facing the lower end portion thereof, and the light of the LED 20 that has entered the lower end portion as the light incident end portion 32 is the first light guide. The light is guided toward the other end 33 while repeating total reflection in the body 30.

  The second light guides 40a, 40b, and 40c are formed in a curved shape so as to go around the outer side of the vehicle from the center of the vehicle along the outer cover 4, and the light guide direction of the first light guide 30 respectively. The first light guide 30 is formed so as to extend in an orthogonal direction (crossing direction). Specifically, in the axial direction of the first light guide 30, the first light guide 30 extends away from each other at three equal intervals, and is shifted in the circumferential direction of the first light guide 30 so that the extending directions do not overlap each other. It is formed to extend. That is, the second light guides 40a, 40b, and 40c follow the curve in the lamp chamber S, and have a shape that turns from the vehicle center to the side of the vehicle, and further from the top to the bottom of the vehicle. The lamp chamber S is arranged in a complicated curved form. Second inner surface reflection steps 44, 44, formed on each back surface of the second light guides 40 a, 40 b, 40 c by prism-like grooves that reflect light from the second light guide toward the outside of the lamp. 44 is formed over the entire area.

  In the outer surface of the first light guide 30, the outer surface of the second light guide 40 in the direction orthogonal to the end surface of the extended base end portion 42 extends in the extending direction of the second light guide 40. The first inner surface reflection steps 34, 34, 34 formed by the prism-shaped grooves that reflect the light guide toward the first light guide 30 have different extending directions (light guide directions) in the circumferential direction of the first light guide 30. Two light guides 40a, 40b, and 40c are formed at three locations opposite to the base end portions 42, 42, and 42.

  In the light guide member 10, when the LED 20, which is a light source, is turned on, the light source light incident from the light incident end 32 of the first light guide 30 is guided through the first light guide 30 while repeating total reflection. In the first inner surface reflection steps 34, 34, and 34, the first light is reflected toward the base end portion 42 of the second light guides 40a, 40b, and 40c in the direction orthogonal to the end face of the base end portion 42. Is done. The light that has entered the second light guides 40a, 40b, and 40c from each base end part 42 is directed toward the other end part 43 while repeating total reflection inside the second light guides 40a, 40b, and 40c, respectively. In addition to being guided, the light is secondly reflected by the second inner surface reflection steps 44, 44, 44 and emitted to the outside of the lamp. As a result, the second light guides 40a, 40b, and 40c emit light in a strip shape with a depth (distant) in the lamp chamber S following the curvature of the outer cover 4.

  That is, on the outer surface of the first light guide 30, the first inner surface reflection step 34 is selectively formed in the circumferential direction in addition to the axial direction of the first light guide 30, and the place where the light guide is to be taken out By controlling the direction to be taken out, the light guide member 10 efficiently guides light even if the light guide member 10 has a three-dimensionally complicated shape.

  The second light guides 40a, 40b, and 40c divided into a plurality of bodies can take a complicated form, and the first light guide 30 can be formed by selectively forming the first inner surface reflection step 34. Since multiple second light guides can reliably emit light as a base point, the degree of freedom of design variation is high, and it is possible to easily cope with the three-dimensional complex shape that accompanies the diversification of vehicle lamp designs in recent years. is there.

  In addition, since the first inner surface reflection step 34 in the first light guide 30 is formed on the outer surface instead of the inside of the first light guide 30 as in the conventional structure, the first inner surface reflection step 34 can be easily formed. Thus, the light guide member 10 can be easily formed, and the light guide member 10 is also inexpensive.

  In addition, since the first light guide 30 and the second light guides 40a, 40b, and 40c are integrally formed, the light guide member 10 can be formed more easily. Furthermore, when the light guide member 10 is assembled in the lamp chamber S, the first inner surface reflection steps 34, 34, 34 of the first light guide 30 and the base end portions 42 of the second light guides 40a, 40b, 40c, Since it is not necessary to align 42 and 42, arrangement | positioning is also easy.

  (Second Embodiment) FIGS. 4 and 5 show an embodiment in which the second embodiment of the present invention is applied to a tail and stop lamp, and FIG. 4 shows a tail according to the second embodiment of the present invention. FIG. 5 is a front sectional view of the vehicular lamp in which the and stop lamp is accommodated, and FIG. 5 is a longitudinal sectional view of the lamp (a cross-sectional view taken along line VV shown in FIG. 4). In addition, LED which is a light source like the 1st Example is represented with a broken line.

  In the second embodiment, a light guide member 11 is provided as a tail and stop lamp C in place of the light guide member 10. In the light guide member 11, the first light guides 30a and 30b are arranged in parallel with a distance between them, and the second light guides 40a, 40b and 40c are connected to the first light guides 30a and 30b. Are extended so that their extending directions coincide with each other in the circumferential direction. Corresponding to this, the positions of the first inner surface reflection step 34 of the first light guide 30 are the base end portions 42a, 42a, 42a of the second light guides 40a, 40b, 40c on the first light guide 30a side. Similarly, the first light guide 30b is opposed to the base end portions 42b, 42b, 42b, and the first guide is formed on the outer surface in the direction orthogonal to the end surfaces of the base end portions 42a, 42b. The light bodies 30a and 30b are formed in a line at three equal intervals in the axial direction. Other configurations are the same as those of the first embodiment.

  A second LED 22 different from the LED 20 that is the light source of the light guide member 11 is disposed below the lamp chamber S so as to emit light toward the upper side of the lamp chamber S. The light guide member 11, a reflector 50 having a reflecting surface 52 that is formed in a parabolic shape in a longitudinal section and that has a surface that forms a light distribution outward of the lamp is disposed.

  In the light guide member 11, as in the first embodiment, the light source light incident from the light incident end 32 of the first light guides 30 a and 30 b corresponds to the second light guide corresponding to each first internal reflection step 34. First reflected selectively toward 40a, 40b, and 40c. The incident light from the first light guide 30a is guided toward the end 42b, and the incident light from the first light guide 30b is guided toward the end 42a. Second reflected and emitted outward from the lamp. That is, the light guide member 11 has a complicated shape by selectively forming the first inner surface reflection step 34 in the axial direction of the first light guides 30a and 30b and controlling the place where the light guide is to be taken out. The second light guides 40a, 40b, and 40c emit light in a strip shape following the curvature of the outer cover 4. Furthermore, since light enters from both ends 42a and 42b of the second light guide, the second light guides 40a, 40b and 40c emit light uniformly.

  On the other hand, the light from the second LED 22 is reflected by the reflecting surface 52 of the reflector 50, passes through the second light guide and the separation portion 46 between the second light guides, and is emitted to the outside of the lamp. When viewed from the front, the gaps (separating portions 46) between the second light guides 40a, 40b, and 40c are caused to emit light.

  Therefore, when the LED 20 is turned on, the second light guides 40a, 40b, and 40c emit light and function as a tail lamp. Moreover, when LED22 lights simultaneously with LED20, the area | region corresponding to the reflector 50 will light-emit from the separation part 46 of 2nd light guide 40a, 40b, 40c, the light emission area and the brightness | luminance of the whole lamp B will go up, and it will serve as a stop lamp. Function. In other words, by utilizing the gap between the light guide member 11 and overlapping the light emission region by the light guide member 11 and the reflector 50 in the front view of the lamp and effectively using the space in the lamp chamber S, light emission of a plurality of functions can be obtained. The lamp 1 is realized in a space-saving manner.

  In addition, since the plurality of second light guides 40a, 40b, and 40c cross between the two first light guides 30a and 30b, the end portions 42a and 42b of each second light guide. Both ends are held by the first light guides 30a and 30b, and the strength of the light guide member 11 is also ensured.

  The light guide member 11 uses a white LED as the LED 20 and a red LED as the second LED 22 to change the color of light emission so that the light guide member 11 functions as a backup lamp and the separation portion 46 functions as a tail and stop lamp. It is also possible to do.

  (Third Embodiment) FIG. 6 shows an embodiment in which the third embodiment of the present invention is applied to a tail and stop lamp. FIG. 6 shows a tail and stop lamp according to the third embodiment of the present invention. It is a front view of the vehicular lamp in which is stored. In addition, LED which is a light source like the 1st Example is represented with a broken line.

  In the third embodiment, a light guide member 12 is provided as a tail and stop lamp C in place of the light guide member 10. As in the second embodiment, the light guide member 12 has a configuration in which the extending direction of the second light guide coincides with the circumferential direction of the first light guide 30, and the first inner surface reflecting step 34 is the first. A second light guide formed in a trapezoidal shape that tapers from the base end 42 to the other end 43 from the first light guide 30A formed in a row at three equal intervals in the direction of one light guide axis. 40A, 40B, and 40C are formed extending from the first light guide 30A. The first light guide 30A is formed in a curved shape following the shape of the outer cover 4, and extends in the vehicle left-right direction near the lower side of the lamp compartment, and the second light guides 40A, 40B, 40C extend in the vehicle vertical direction. It is arranged by. Other configurations are the same as those of the first embodiment.

  Also in the light guide member 12, the light source light incident from the light incident end portion 32 of the first light guide 30A is selectively directed toward the corresponding second light guides 40A, 40B, and 40C in the first inner surface reflection step 34. First reflection. The incident light from the first light guide 30A is guided toward the other end 43 of the second light guides 40A, 40B, and 40C, and second reflected by the second inner surface reflection steps 44, 44, and 44. Then, the light is emitted outward from the lamp, and the second light guides 40A, 40B, and 40C emit light with a novel appearance in a trapezoidal shape. In other words, the first inner surface reflection step 34 is selectively formed in the axial direction of the first light guide 30A, and even if the light guide member 12 has a complicated shape, the light guide is efficiently guided to reliably emit light. Since the 2nd light guide divided | segmented into the body can light-emit in arbitrary shapes, without being limited to line light emission, the freedom degree of design variation is increasing.

  In addition, you may use the structure which inject | emits light from the separation part of a 2nd light guide to the exterior of a lamp using a 2nd light source in a 2nd Example in a 1st and 3rd Example.

  In the first to third embodiments, the first light guide and the second light guide are integrally formed. However, as long as the design is possible, they may be formed separately.

  In the first to third embodiments, the inner surface reflection step is formed by forming a prism-shaped groove. However, the inner surface reflection step may be a dot or the like, and if it reflects light in a desired direction, The shape is not limited.

  In the first to third embodiments, the first inner surface reflecting portion is formed on the outer surface of the first light guide only at the position facing the base end of the second light guide. Another inner reflection part may be formed at an arbitrary position where light guided through one light guide is emitted from the first light guide, and the first light guide may also emit light.

  Furthermore, light that has been guided to the end (the other end) opposite to the light incident end of the first light guide is not emitted from the first light guide in the direction opposite to the light guide direction. A reflection process may be performed or a retroreflective surface may be formed so that the light use efficiency can be enhanced by reflecting the inner surface.

  Although the first to third embodiments are used as the rear combination lamp, the front lamp may be used as a clearance lamp or a daytime running lamp.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Lamp body 4 Outer cover 10, 11, 12 Light guide member 20 LED (light source of light guide member)
22 2nd LED (2nd light source)
30, 30a, 30b, 30A First light guide 32 Light incident end 34 First internal reflection step 40a, 40b, 40c, 40A, 40B, 40C Second light guide 42, 42a, 42b Base end 44 Second Internal reflection step 46 Separation part 50 Reflector S Lamp chamber A Turn signal lamp B Backup lamp C Tail and stop lamp

Claims (5)

A first light guide that extends in a columnar shape, a second light guide that extends in a direction that intersects the light guide direction of the first light guide, and that makes the light guide direction different from the first light guide, A vehicle lamp comprising: a light source disposed at a position facing the light incident end of the first light guide;
A plurality of the second light guides are provided,
A first inner surface reflecting portion is formed at a location on the outer surface of the first light guide opposite to the base end of each second light guide,
The light source light incident from the light incident end and guided into the first light guide is reflected by the first inner surface reflection portion of the first light guide and is reflected from the base end of the second light guide. A vehicular lamp characterized by being guided into the second light guide, reflected by a second inner surface reflection portion formed on the second light guide, and emitted from the second light guide to the outside of the lamp.   The second light guides are provided so as to be spaced apart from each other in the axial direction of the first light guide, and extend so that their extending directions coincide with the circumferential direction of the first light guide. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided.   The second light guides are provided so as to be separated from each other in the axial direction of the first light guide, and extend in a circumferential direction of the first light guide so that the extending directions of the second light guides do not overlap with each other. The vehicular lamp according to claim 1. Two first light guides are provided and spaced apart from each other, and the second light guide is provided so as to connect the two first light guides,
The light from the 2nd light source different from the said light source passes through the space | interval part of a said 2nd light guide and a 2nd light guide, and it radiate | emits toward a lamp exterior. The vehicular lamp according to any one of?   The vehicular lamp according to any one of claims 1 to 4, wherein the first light guide and the second light guide are formed of an integrally molded body made of a light-transmitting synthetic resin.

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