JP2014082041A - Vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp with a light guide plate which has a stereoscopic effect on a way of illuminating when turned on.SOLUTION: A vehicular lamp has a first light guide plate 20A and a second light guide plate 20B arranged double one behind the other so as to extend in a vehicle width direction. In this case, the second light guide plate 20B extends longer than the first light guide plate 20A outward in the vehicle width direction while arranged having one end face 20Ac inside in the vehicle width direction located nearby one end face 20Bc of the first light guide plate 20A. Consequently, when the lamp is turned on, the second light guide plate 20B and first light guide plate 20A emit double light brightly where they overlap with each other and only the second light guide plate 20B emits light where they do not overlap so as to give a stereoscopic effect in way of illuminating. The stereoscopic effect is thus given by the first and second light guide plates 20A, 20B which are arranged double one behind the other so as to make the depth dimension of the lamp small.

Description

  The present invention relates to a vehicular lamp provided with a light guide plate.

  Conventionally, a vehicle lamp having a light guide plate arranged so that light from a light source is incident is known, and the light guide plate extends in a direction intersecting with the front-rear direction of the lamp. An arrangement is known in which light from a light source incident from one end face is emitted from the front face.

  In “Patent Document 1”, in such a vehicle lamp, a configuration in which a plurality of light sources and a reflector that reflects light from the plurality of light sources forward is arranged on the rear side of the light guide plate. Have been described. The vehicle lamp described in “Patent Document 1” is configured to transmit a part of the reflected light from the reflector through the light guide plate.

JP 2010-21001 A

  If the structure described in the above-mentioned “Patent Document 1” is adopted, the reflector and the light guide plate appear to shine simultaneously when the lamp is turned on, so that it is possible to produce a three-dimensional lighting method.

  However, when such a configuration is adopted, there is a problem that the depth dimension of the lamp is increased.

  The present invention has been made in view of such circumstances, and in a vehicular lamp provided with a light guide plate, a three-dimensional effect is imparted to the lighting method when the lamp is turned on without increasing the depth dimension of the lamp. An object of the present invention is to provide a vehicular lamp.

  The present invention is intended to achieve the above object by devising the structure of the light guide plate.

That is, the vehicular lamp according to the present invention is
In a vehicular lamp comprising a light source and a light guide plate arranged so that light from the light source is incident thereon,
The light guide plate is arranged to extend in a first direction intersecting the lamp front-rear direction, and is configured to emit light from the light source incident from one end surface in the first direction from the front surface. The light guide plate is disposed so as to extend in the first direction on the rear side of the first light guide plate, and is incident from one end surface located on the same side as the one end surface of the first light guide plate with respect to the first direction. A second light guide plate configured to emit light from the light source from the front surface,
The second light guide plate is disposed such that one end surface of the second light guide plate is positioned in the vicinity of the one end surface of the first light guide plate, and more than the first light guide plate with respect to the first direction. It is formed so that it may extend long.

  The specific direction is not particularly limited as long as the “first direction” is a direction that intersects the front-rear direction of the lamp.

  If the “first light guide plate” and the “second light guide plate” are formed so that the second light guide plate extends longer than the first light guide plate with respect to the first direction, each of the first light guide plate and the second light guide plate may be concrete. The length is not particularly limited.

  The “light source” may be a single light source or a plurality of light sources. At this time, the light sources from the same light source may be incident on each of the first and second light guide plates. It may be arranged so that light from different light sources may enter.

  As shown in the above configuration, in the vehicular lamp according to the present invention, the first light guide plate and the second light guide plate are arranged in a double-front direction so that the first light guide plate and the second light guide plate extend in the first direction intersecting the lamp front-rear direction. In this case, the second light guide plate is arranged with the one end surface in the first direction positioned in the vicinity of the one end surface of the first light guide plate, and the first light guide plate with respect to the first direction. Since it is formed to extend longer than the above, the following effects can be obtained.

  That is, when the lamp is turned on, the first light guide plate emits light by the light guided through the first light guide plate, and the second light guide plate emits light behind the first light guide plate by the light guided through the second light guide plate. However, at that time, the portion where the second light guide plate and the first light guide plate overlap emits light twice brightly, and the portion where the second light guide plate does not overlap emits light only from the second light guide plate. Therefore, it is possible to produce a three-dimensional lighting method. And since such an effect can be obtained with the 1st and 2nd light-guide plate arrange | positioned doubly front and back, the depth dimension of a lamp can be restrained small.

  As described above, according to the present invention, in the vehicular lamp provided with the light guide plate, it is possible to give a three-dimensional feeling to the lighting method when the lamp is turned on without increasing the depth dimension of the lamp.

  Further, as in the present invention, the second light guide plate extending longer than the first light guide plate is arranged on the rear side of the first light guide plate, so that the front side of the first and second light guide plates is provided. Even when the translucent cover to be arranged is formed so as to wrap around backward in the first direction, it is possible to easily prevent the first and second light guide plates from interfering with the translucent cover. Become.

  In the above configuration, if the second light guide plate is formed to extend longer than the first light guide plate with respect to the lamp front-rear direction and the second direction intersecting the first direction, A region where the second light guide plate partially overlaps can be expanded in two directions, thereby making it possible to more effectively produce a three-dimensional lighting method.

  In the above configuration, the other end surface in the first direction of each of the first and second light guide plates is formed as an inner surface reflection surface that reflects the light guided through the light guide plate to the inner surface and emits the light from the front surface. If so, the end edge portions of the first and second light guide plates can be clearly lit at different positions, and thereby, a three-dimensional shine can be more effectively produced.

  In the above configuration, if each of the first and second light guide plates is formed so as to be displaced backward from one end surface to the other end surface in the first direction, the first and second light guide plates are formed. When the translucent cover arranged on the front side of the light plate is formed so as to wrap around toward the rear, it is possible to more easily prevent the first and second light guide plates from interfering with the translucent cover. Become.

  In the above configuration, the first and second light-emitting elements disposed in the vicinity of one end surface in the first direction of the light guide plate with respect to each of the first and second light guide plates as the light source. The light guide in each of the first and second light guide plates can be performed smoothly. In that case, each of the first and second light emitting elements may be singular or plural.

The front view which shows the vehicle lamp which concerns on one Embodiment of this invention II-II sectional view of FIG. III-III sectional view of FIG. FIG. 2 is a view similar to FIG. 2 showing the main part taken out in order to explain the optical function of the vehicle lamp. The same figure as FIG. 1 which shows the said vehicle lamp in a lighting state

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a vehicular lamp 10 according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

  As shown in these drawings, a vehicular lamp 10 according to the present embodiment is a tail lamp provided at a right rear end portion of a vehicle, and a lamp body 12 and a through hole attached to a front end opening portion of the lamp body 12 are illustrated. A plurality of light guide plates 20A, 20B, and 20C, and a plurality of light guide plates 20A, 20B, and 20C that are arranged so that light is incident on the light guide plates 20A, 20B, and 20C. The light emitting elements 30A, 30B, and 30C are incorporated.

  As for the vehicular lamp 10, in FIG. 2, the direction indicated by X is “front” (“rear” for vehicles), and the direction indicated by Y is “right direction” orthogonal to “front”.

  The lamp body 12 and the translucent cover 14 are formed in a lateral U-shape when viewed from the front of the lamp so as to surround a horizontally elongated rectangular space 16 from the right side and the upper and lower sides. And the translucent cover 14 is formed so that it may go back toward the outer peripheral edge part from the inner peripheral part along the space part 16 toward the outer peripheral part.

  The three light guide plates 20A, 20B, and 20C are all transparent synthetic resin molded products made of acrylic resin or the like, and are arranged on the first light guide plate 20A and the rear side of the first light guide plate 20A. It consists of two light guide plates 20B and a third light guide plate 20C disposed on the rear side of the second light guide plate 20B.

  All of these three light guide plates 20A, 20B, and 20C are formed in a lateral U-shape so as to surround the space 16. At that time, the second light guide plate 20B is formed in a size larger than the first light guide plate 20A, and the third light guide plate 20C is formed in a size larger than the second light guide plate 20B. Yes. However, these three light guide plates 20A, 20B, and 20C are arranged at positions where one end surfaces 20Ac, 20Bc, and 20Cc on the inner peripheral side are close to each other in the front view of the lamp, and the other end surface 20Ad on the outer peripheral side thereof. 20Bd and 20Cd are arranged so as to be located on the outer peripheral side in this order in the front view of the lamp.

  20 A of 1st light-guide plates are formed so that it may go around a little back toward the other end surface 20Ad from the one end surface 20Ac. A plurality of reflective elements 20As are formed on the rear surface 20Ab of the first light guide plate 20A at substantially equal intervals in the vertical and horizontal directions.

  The second light guide plate 20B is formed so as to slightly wrap around from the one end face 20Bc toward the other end face 20Bd at substantially equal intervals from the first light guide plate 20A. A plurality of reflective elements 20Bs are formed on the rear surface 20Bb of the second light guide plate 20B at substantially equal intervals in the vertical and horizontal directions. At this time, each of these reflection elements 20Bs is formed at a position that does not overlap with each reflection element 20As in the front view of the lamp.

  The third light guide plate 20C is formed so as to slightly wrap around from the one end face 20Cc toward the other end face 20Cd at substantially equal intervals with the second light guide plate 20B. A plurality of reflective elements 20Cs are formed on the rear surface 20Cb of the third light guide plate 20C at substantially equal intervals in the vertical and horizontal directions. At this time, each of these reflection elements 20Cs is formed at a position that does not overlap with each of the reflection elements 20As and 20Bs when the lamp is viewed from the front.

  Each of these reflective elements 20As, 20Bs, and 20Cs is formed as a conical recess.

  The other end surfaces 20Ad, 20Bd, 20Cd of the light guide plates 20A, 20B, 20C are formed in a cross-sectional shape in which corners on the front surfaces 20Aa, 20Ba, 20Ca side are acute angles.

  On the other hand, the plurality of light emitting elements 30A, 30B, and 30C are all red light emitting diodes, and the plurality of first light emitting elements 30A disposed in the vicinity of the one end face 20Ac of the first light guide plate 20A and the second light emitting element. It consists of a plurality of second light emitting elements 30B arranged in the vicinity of one end face 20Bc of the optical plate 20B and a plurality of third light emitting elements 30C arranged in the vicinity of one end face 20Cc of the third light guide plate 20C.

  At this time, each of the plurality of light emitting elements 30A, 30B, and 30C is disposed so that the light emitting surface thereof faces the one end surfaces 20Ac, 20Bc, and 20Cc of the light guide plates 20A, 20B, and 20C. The plurality of light emitting elements 30A, 30B, and 30C are arranged at substantially equal intervals in the direction along the inner peripheral edge shape of each light guide plate 20A, 20B, and 20C.

  The plurality of light emitting elements 30 </ b> A, 30 </ b> B, and 30 </ b> C are supported by a common light source support member 32. The light source support member 32 is supported by the lamp body 12.

  The three light guide plates 20A, 20B, and 20C are supported by the common light guide plate support member 22 at the end portions on the one end faces 20Ac, 20Bc, and 20Cc side. The light guide plate support member 22 is formed with a reflector portion 22a extending in the vicinity of the rear of the third light guide plate 20C along the rear surface 20Cb. A flange portion 22b that supports the third light guide plate 20C on the other end surface 20Cd is formed at the outer peripheral end portion of the reflector portion 22a. Further, the front surface 22a1 of the reflector portion 22a is subjected to a reflection surface treatment by aluminum vapor deposition or the like.

  FIG. 4 is a view similar to FIG. 2, showing an essential part extracted for explaining the optical function of the vehicular lamp 10 according to the present embodiment.

  As shown in the figure, the light incident from one end face 20Ac, 20Bc, 20Cc on each light guide plate 20A, 20B, 20C from each of the plurality of light emitting elements 30A, 30B, 30C is the front face 20Aa, 20Ba, The light is guided toward the other end surfaces 20Ad, 20Bd, and 20Cd while repeating internal reflection at 20Ca and the rear surfaces 20Ab, 20Bb, and 20Cb. At that time, the light that has reached one of the plurality of reflecting elements 20As, 20Bs, and 20Cs in the middle of the light guide is internally reflected by the reflecting elements 20As, 20Bs, and 20Cs, and is emitted forward from the front surfaces 20Aa, 20Ba, and 20Ca. Will be. The light reaching the other end surfaces 20Ad, 20Bd, and 20Cd of the light guide plates 20A, 20B, and 20C is internally reflected by the other end surfaces 20Ad, 20Bd, and 20Cd and is emitted forward from the front surfaces 20Aa, 20Ba, and 20Ca. It will be.

  In each of these light guide plates 20A, 20B, and 20C, internal reflection at the front surfaces 20Aa, 20Ba, and 20Ca and the rear surfaces 20Ab, 20Bb, and 20Cb, internal reflection at each reflective element 20As, 20Bs, and 20Cs, and the other end surfaces 20Ad, 20Bd, and 20Cd Most of the internal reflection is performed by total reflection.

  The light leaked rearward from the rear surface 20Cb of the third light guide plate 20C or the reflecting elements 20Cs is reflected by the front surface 22a1 of the reflector portion 22a of the light guide plate support member 22, and reenters the third light guide plate 20C. The light is emitted forward from the front surface 20Ca.

  FIG. 5 is a view similar to FIG. 1 showing the vehicular lamp 10 according to the present embodiment in a lighting state.

  As shown in the figure, the light guide plates 20A, 20B, and 20C appear to shine when the light emitting elements 30A, 30B, and 30C are turned on.

  At that time, the first light guide plate 20A located on the foremost side appears to shine uniformly uniformly as a whole by the light internally reflected by the plurality of reflecting elements 20As formed on the rear surface 20Ab. At that time, the other end surface 20Ad of the first light guide plate 20A looks particularly bright due to the inner surface reflected light.

  The second light guide plate 20B located on the rear side of the first light guide plate 20A appears to shine evenly as a whole by the light internally reflected by the plurality of reflecting elements 20Bs formed on the rear surface 20Bb. At that time, the other end surface 20Bd of the second light guide plate 20B looks particularly bright due to the inner surface reflected light. However, since the first light guide plate 20A is disposed on the front side of the second light guide plate 20B, only a portion that does not overlap with the first light guide plate 20A appears to shine directly, and the portion that overlaps the first light guide plate 20A. Looks shining through.

  The third light guide plate 20C located on the rear side of the second light guide plate 20B appears to shine evenly as a whole by the light internally reflected by the plurality of reflection elements 20Cs formed on the rear surface 20Cb. At this time, the other end surface 20Cd of the third light guide plate 20C looks particularly bright due to the inner surface reflected light. However, since the first and second light guide plates 20A and 20B are arranged on the front side of the third light guide plate 20C, only the portions that do not overlap with these appear to shine directly, and overlap with the second light guide plate 20B. The part that is visible appears to shine through the second light guide plate 20B, and the part that overlaps the first and second light guide plates 20A and 20B shines through the first and second light guide plates 20A and 20B. appear.

  Next, the effect of this embodiment is demonstrated.

  In the vehicular lamp 10 according to the present embodiment, the first light guide plate 20A and the second light guide plate 20B are doubled in the front-rear direction so that they extend in the vehicle width direction (that is, the first direction intersecting the lamp front-rear direction). In this case, the second light guide plate 20B is arranged in such a manner that the one end surface 20Bc on the inner side in the vehicle width direction is positioned in the vicinity of the one end surface 20Ac of the first light guide plate 20A. Since it is formed to extend longer than the first light guide plate 20A toward the outside in the direction, the following operational effects can be obtained.

  That is, when the lamp is turned on, the first light guide plate 20A emits light by the light guided through the first light guide plate 20A, and the second light guide plate 20B is converted into the first light guide plate by the light guided through the second light guide plate 20B. Light is emitted behind 20A. At that time, the portion where the second light guide plate 20B and the first light guide plate 20A overlap emits light twice, and the portion where the second light guide plate 20A does not overlap is the second light guide plate. Since only 20B emits light, it is possible to produce a three-dimensional lighting method. And since such an effect can be obtained by the 1st and 2nd light-guide plates 20A and 20B arrange | positioned doubly front and back, the depth dimension of a lamp can be restrained small.

  As described above, according to the present embodiment, in the vehicular lamp 10 provided with the light guide plate, it is possible to give a stereoscopic effect to the way the lamp shines without increasing the depth dimension of the lamp.

  Further, as in this embodiment, the second light guide plate 20B extending longer than the first light guide plate 20A is arranged on the rear side of the first light guide plate 20A, so that the first and second light guide plates are formed. The first and second light guide plates 20A and 20B are transparent even though the light-transmitting cover 14 disposed on the front side of 20A and 20B is formed so as to wrap around toward the rear in the vehicle width direction. It is easy to avoid interference with the light cover 14.

  At this time, in the present embodiment, the second light guide plate 20B is formed to extend longer than the first light guide plate 20A in the vertical direction (that is, the lamp front-rear direction and the second direction intersecting the first direction). Therefore, the region where the first light guide plate 20A and the second light guide plate 20B partially overlap can be expanded in two directions, thereby more effectively producing a three-dimensional lighting method. it can.

  In the present embodiment, the other end surfaces 20Ad and 20Bd on the vehicle width direction outer side and the upper and lower sides of each of the first and second light guide plates 20A and 20B reflect the light guided through the light guide plates 20A and 20B. Since it is formed as an inner surface reflecting surface that is emitted from the front surfaces 20Aa and 20Ba, the edge portions of the first and second light guide plates 20A and 20B can be clearly illuminated at different positions, thereby It is possible to produce a three-dimensional lighting method more effectively.

  Further, in the present embodiment, each of the first and second light guide plates 20A, 20B is formed so as to be displaced rearward from the one end face 20Ac, 20Bc toward the other end face 20Ad, 20Bd. The first and second light guides are formed in spite of the fact that the translucent cover 14 disposed on the front side of the first and second light guide plates 20A and 20B is formed to wrap around toward the outer peripheral edge. It becomes easier to prevent the optical plates 20A and 20B from interfering with the translucent cover 14.

  In the vehicular lamp 10 according to the present embodiment, as the light source, the first and second light emitting elements disposed near the one end surfaces 20Ac and 20Bc with respect to the first and second light guide plates 20A and 20B, respectively. Since it is the structure provided with 30A and 30B, the light guide in each of the 1st and 2nd light-guide plates 20A and 20B can be performed smoothly. At that time, since the plurality of first and second light emitting elements 30A and 30B are arranged along the one end faces 20Ac and 20Bc, respectively, the first and second light guide plates 20A and 20B are made to shine even more brightly and uniformly. Can do.

  Further, in the present embodiment, the first and second light guide plates 20A and 20B are formed in a lateral U shape so as to surround the space 16 from the right side and the upper and lower sides. Since the light from each of the plurality of first and second light guide plates 20A and 20B disposed in the vicinity of the end faces 20Ac and 20Bc located on the circumferential side is made incident, a laterally U-shaped region Can be made to appear shining partially overlapping in front and rear.

  Furthermore, in the present embodiment, a third light guide plate 20C that is slightly larger than the second light guide plate 20B is disposed on the rear side of the second light guide plate 20B. Since the light is made incident from the plurality of third light emitting elements 30C arranged in the vicinity of the one end face 20Cc located on the circumferential side, the lateral U-shaped region partially overlaps the front and rear triple. To make it look shining. Thereby, it is possible to give a further three-dimensional effect due to the way of lighting when the lamp is turned on.

  Note that the vehicular lamp 10 according to the present embodiment has a horizontally long rectangular space 16, but other lamps can be arranged in the space 16. Alternatively, after the vehicle lamp 10 according to the present embodiment is arranged along the rear window of the vehicle, the space portion 16 can be used as a window portion for rearward viewing of the vehicle driver.

  In the above-described embodiment, the light emitting diode is used as the light source 30, but a configuration using other types of light sources is also possible.

  In the above embodiment, the case where the vehicular lamp 10 is a tail lamp provided at the right rear end of the vehicle has been described. However, the same configuration as that of the above embodiment is adopted regardless of the location and function provided in the vehicle. By doing so, it is possible to obtain the same effect as the above-described embodiment.

  In addition, the numerical value shown as a specification in the said embodiment is only an example, and of course, you may set these to a different value suitably.

  The invention of the present application is not limited to the configuration described in the above embodiment, and configurations with various other changes can be employed.

DESCRIPTION OF SYMBOLS 10 Vehicle lamp 12 Lamp body 14 Translucent cover 16 Space part 20A 1st light-guide plate 20Aa, 20Ba, 20Ca Front surface 20Ab, 20Bb, 20Cb Rear surface 20Ac, 20Bc, 20Cc One end surface 20Ad, 20Bd, 20Cd The other end surface 20As, 20Bs20C Reflective element 20B Second light guide plate 20C Third light guide plate 22 Light guide plate support member 22a Reflector portion 22a1 Front face 22b Flange portion 30A First light emitting element 30B Second light emitting element 30C Third light emitting element 32 Light source support member

Claims (5)

In a vehicular lamp comprising a light source and a light guide plate arranged so that light from the light source is incident thereon,
The light guide plate is arranged to extend in a first direction intersecting the lamp front-rear direction, and is configured to emit light from the light source incident from one end surface in the first direction from the front surface. The light guide plate is disposed so as to extend in the first direction on the rear side of the first light guide plate, and is incident from one end surface located on the same side as the one end surface of the first light guide plate with respect to the first direction. A second light guide plate configured to emit light from the light source from the front surface,
The second light guide plate is disposed such that one end surface of the second light guide plate is positioned in the vicinity of the one end surface of the first light guide plate, and more than the first light guide plate with respect to the first direction. A vehicular lamp characterized by being formed to extend long.   The said 2nd light-guide plate is formed so that it may extend longer than the said 1st light-guide plate regarding the 2nd direction which cross | intersects the said lamp front-back direction and the said 1st direction. Vehicle lamps.   The other end surface in the first direction of each of the first and second light guide plates is formed as an inner surface reflection surface that reflects the light guided through the light guide plate to the inner surface and emits the light from the front surface of the light guide plate. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided.   Each of the said 1st and 2nd light-guide plate is formed so that it may displace to back side toward the other end surface from the one end surface of the said 1st direction, The one of Claims 1-3 characterized by the above-mentioned. The vehicle lamp as described.   The light source includes first and second light-emitting elements disposed in the vicinity of one end surface of the light guide plate in the first direction with respect to each of the first and second light guide plates. The vehicle lamp according to any one of claims 1 to 4.

Images