JP2018092753A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an appearance from being impaired when a lighting fixture in a state where a light source is turned on, is observed from a front side even in a case where a front face and a rear face of a tabular light guide are disposed while being tilted with respect to a vertical plane including a required direction, in the lighting fixture comprising a tabular light guide for guiding light that is made incident from the light source, in the required direction.SOLUTION: A tabular light guide 30 is tilted to a rear side with respect to a vertical plane including a required direction. Correspondingly, multiple reflection elements 30s formed on a rear face 30b are formed so as to extend in a direction inclined to a right side with respect to a vertical direction from a lower end face 30f to an upper end face 30e of a tabular light guide 30 in a front view of a lighting fixture (namely, in a direction which is inclined in such a manner that an end that is positioned at a rear side between both ends of each reflection element 30s gets closer to a light source 20 than an end that is positioned at a front side). Thus, a brightening part B that looks bright in a stripe shape is formed so as to extend substantially in the required direction (horizontal direction).SELECTED DRAWING: Figure 5

Description

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

  Conventionally, a lamp provided with a light guide that guides light incident from a light source in a required direction is known, and a lamp provided with a plate-like light guide as the light guide is also known.

  In “Patent Document 1”, as a plate-shaped light guide in such a lamp, light guided through the plate-shaped light guide is internally reflected by a plurality of reflecting elements formed on the rear surface thereof, and then from the front surface. What is configured to emit is described.

  In the plate-shaped light guide described in “Patent Document 1”, the front surface and the rear surface thereof are vertical surfaces including the required direction (that is, the direction in which light from the light source incident on the plate-shaped light guide is guided). The reflective elements are arranged so as to extend along the direction, and each reflective element is formed to extend in a direction orthogonal to the required direction.

JP 2013-206875 A

  In the lamp described in the above-mentioned “Patent Document 1”, when the lamp with the light source turned on is observed from the front, the plate-like light guide appears to shine along the required direction.

  However, when the front and rear surfaces of the plate-shaped light guide are arranged in a state inclined with respect to the vertical plane including the required direction, each reflective element is orthogonal to the required direction. If the lamp is extended in the direction in which the light source is turned on, the plate-like light guide will appear to shine in a streak along the direction inclined with respect to the required direction when the lamp with the light source turned on is observed from the front. And this will impair the appearance of the lamp.

  This invention is made | formed in view of such a situation, Comprising: In the lamp provided with the plate-shaped light guide which guides the light which injected from the light source to a required direction, the front surface and rear surface of a plate-shaped light guide are the above-mentioned. Even when it is arranged in an inclined state with respect to the vertical plane including the required direction, it is possible to prevent the appearance when the lamp with the light source turned on is observed from the front. The purpose is to provide a lamp.

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

That is, the lamp according to the present invention is
In a lamp provided with a light source and a plate-shaped light guide that guides light incident from the light source in a required direction,
The plate-shaped light guide reflects the light from the light source guided to the plate-shaped light guide to the inner surface by a plurality of reflecting elements formed on the rear surface of the plate-shaped light guide to cause the plate-shaped light guide. It is configured to emit from the front of the body,
The plurality of reflective elements are arranged in a state aligned in the required direction so as to extend in a direction intersecting the required direction,
The plate-shaped light guide is disposed in a state where the front and rear surfaces of the plate-shaped light guide are inclined with respect to the vertical plane including the required direction,
Each of the reflecting elements extends in an inclined direction so that an end located on the rear side of both ends of the reflecting element is closer to the light source than an end located on the front side. To do.

  The type of the “light source” is not particularly limited, and for example, a light emitting diode, a laser diode, a light source bulb, or the like can be employed.

  The “plate-shaped light guide” is not particularly limited as long as it is formed in a plate shape. That is, the "plate-shaped light guide" includes not only those formed in a flat plate shape, but also those formed so as to extend along a curved surface, and those formed thickly, The front surface is formed into a curved surface and the rear surface is formed into a flat surface.

  The specific direction of the “required direction” is not particularly limited, and for example, a horizontal direction, a vertical direction, or the like can be adopted.

  The “plurality of reflective elements” are arranged in a state in which they are arranged in the required direction, but at that time, they may be arranged in a state in which they are continuously arranged, or arranged in a state in which they are arranged at intervals. May be.

  In the lamp according to the present invention, the plate-shaped light guide that guides the light incident from the light source in the required direction causes the light guided through the plate-shaped light guide to be internally reflected by a plurality of reflecting elements formed on the rear surface thereof. And a plurality of reflective elements arranged in a state aligned in the required direction so as to extend in a direction intersecting with the required direction. Are arranged with their front and rear surfaces inclined with respect to the vertical plane including the required direction, and each reflecting element has its end located on the rear side at both ends thereof located on the front side. Since it extends in the inclined direction so as to be closer to the light source than the end portion to be performed, the following effects can be obtained.

  That is, the plate-like light guide is arranged with its front and rear surfaces inclined with respect to the vertical plane including the required direction, but each reflecting element has an end portion located on the rear side of its both ends. Since it extends in a direction inclined so as to be closer to the light source than the end located on the front side, the plate-shaped light guide is substantially in the required direction when the lamp with the light source turned on is observed from the front. It can be made to shine along the lines. As a result, the appearance of the lamp can be kept intact.

  As described above, according to the present invention, in the lamp provided with the plate-shaped light guide that guides the light incident from the light source in the required direction, the front surface and the rear surface of the plate-shaped light guide with respect to the vertical surface including the required direction. Even when the lamp is arranged in an inclined state, it is possible to prevent the appearance when the lamp with the light source turned on is observed from the front.

  The said structure WHEREIN: It is also possible to set it as the structure provided with several area | regions from which the inclination angle with respect to the vertical surface containing the said required direction differs mutually in the cross section orthogonal to the said required direction as a plate-shaped light guide. When such a configuration is adopted, if the direction in which each reflecting element extends is set to a different direction for each region, when the lamp with the light source turned on is observed from the front, a plate shape It is possible to make the light guide appear to shine in a streak pattern substantially along the required direction in each region.

  In that case, it is also possible to make it the structure provided with two area | regions in which the direction which inclines with respect to the vertical plane containing the said required direction was set to the opposite direction as a some area | region. Even in the case of adopting such a configuration, when the lamp with the light source turned on is observed from the front, the plate-like light guide appears to shine in a streak shape substantially along the required direction in each region. can do.

  In the above configuration, the plate-shaped light guide has a configuration in which light emitted from the light source is incident from one end surface in the required direction of the plate-shaped light guide, and the light source and one end surface of the plate-shaped light guide A light control member configured to emit light emitted from the light source as substantially parallel light toward one end surface of the plate-shaped light guide is disposed between the light source and the one end surface of the plate-shaped light guide. The following operational effects can be obtained by forming a plurality of lens elements that allow light emitted from the light control member to be incident as light that diffuses in the width direction of the plate-like light guide.

  That is, the light incident from the light source through the light control member can be guided through the plate-shaped light guide as light distributed substantially evenly in the width direction of the plate-shaped light guide. The emitted light can be emitted from a wide range. Therefore, when the lamp with the light source turned on is observed from the front, the plate-like light guide can appear to shine in a strip shape instead of a streak, thereby improving the appearance of the lamp. it can.

The front view which shows the lamp which concerns on one Embodiment of this invention II-II sectional view of FIG. Detailed sectional view taken along line III-III in FIG. (A) is the front view which shows the main components of the said lamp | ramp, (b) is a figure similar to (a) which shows a prior art example 4A is a view similar to FIG. 4A showing the operation of the above embodiment, and FIG. 4B is a view similar to FIG. 4B showing the operation of the conventional example. (A1) is a view similar to FIG. 4 (a) showing a first modification of the above embodiment, (a2) is a sectional view taken along line a2-a2 of (a1), and (b1) is a second modification of the above embodiment. The figure similar to Fig.4 (a) which shows an example, (b2) is the b2-b2 sectional view taken on the line of (b1) FIG. 6A is a view similar to FIG. 6A1 showing the operation of the first modification, and FIG. 6B is a view similar to FIG. 6B1 showing the operation of the second modification. FIG. 4A is a view similar to FIG. 4A showing a third modification of the embodiment, and FIG. 4B is a view similar to FIG. 4A showing the operation of the third modification.

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

  FIG. 1 is a front view showing a lamp 10 according to an embodiment of the present invention. Moreover, it is the II-II sectional view taken on the line of FIG. 1, FIG. 3 is the III-III sectional detail drawing of FIG.

  As shown in these drawings, the lamp 10 according to the present embodiment is a vehicular lamp, and is configured as a clearance lamp provided at the left front end of the vehicle.

  The lamp 10 has a configuration in which a light source 20 and a plate-shaped light guide 30 that guides light incident from the light source 20 are housed in a lamp chamber formed by a lamp body 12 and a transparent light-transmitting cover 14. It has become.

  As for the lamp 10, in these drawings, the direction indicated by X is "front" (also "front" as a vehicle), and the direction indicated by Y is "left direction" (also "left direction" as a vehicle). However, it is “right direction” in front view of the lamp, and the direction indicated by Z is “upward direction”.

  The plate-shaped light guide 30 is configured as a transparent synthetic resin molded product made of acrylic resin or the like.

  The plate-shaped light guide 30 has a vertically long rectangular cross section, and is disposed so as to extend horizontally in the vehicle width direction when the lamp is viewed from the front.

  At this time, the plate-shaped light guide 30 extends so as to be displaced rearward from the right end surface 30c (that is, the end surface on the inner side in the vehicle width direction) toward the left end surface 30d. The plate-shaped light guide 30 receives light from the light source 20 incident from the left end surface 30d in a required direction in which the plate light guide 30 extends toward the right end surface 30c (ie, inward in the vehicle width direction). (Direction extending horizontally diagonally forward).

  The plate-shaped light guide 30 has a front surface 30a and a rear surface 30b inclined rearward with respect to the vertical surface including the required direction (that is, the upper end surface 30e of the plate-shaped light guide 30 is more than the lower end surface 30f. (Displaced to the rear side).

  In the lamp chamber, a decorative extension member 16 is disposed so as to surround the plate-like light guide 30.

  FIG. 4A is a front view showing the light source 20 and the plate light guide 30 extracted from the lamp 10.

  As shown in FIG. 4A, the light source 20 is a white light emitting diode, and the light emitting surface 20a faces the left end surface 30d of the plate-like light guide 30 (that is, the outer end surface in the vehicle width direction). Has been placed. And this light source 20 makes the emitted light from the light emission surface 20a inject into the plate-shaped light guide 30 from the left end surface 30d. The light source 20 is supported by the lamp body 12 (or the extension member 16 or the like) while being mounted on a substrate (not shown).

  The rear surface 30b of the plate-shaped light guide 30 is formed with a plurality of reflection elements 30s for internally reflecting the light incident from the left end surface 30d and guided through the plate-shaped light guide 30 by total reflection. ing.

  The plurality of reflecting elements 30s are arranged over substantially the entire area of the rear surface 30b in a state where the reflecting elements 30s are arranged at substantially intervals in the required direction.

  Each reflective element 30s has a wedge-shaped cross-sectional shape and is formed as a concave groove extending in a direction crossing the required direction. At that time, each reflecting element 30s extends in a direction inclined rightward (that is, outside in the vehicle width direction) with respect to the vertical direction from the lower end surface 30f to the upper end surface 30e of the plate-like light guide 30 in a front view of the lamp. Is formed.

  At that time, the side inclination angle θ with respect to the vertical direction of each reflective element 30s is relative to the rear inclination angle α (see FIG. 2) with respect to the vertical plane including the required directions of the front surface 30a and the rear surface 30b of the plate light guide 30. Is set to a value within a range of 0.5 to 1 times (for example, a value of about θ = 20 ° when α = 30 °).

  4B is a view similar to FIG. 4A, showing a plate-shaped light guide 30 ′ as a conventional example with respect to the plate-shaped light guide 30 of the present embodiment, together with the light source 20.

  As shown in FIG. 4B, the basic configuration of the plate-shaped light guide 30 ′ according to the conventional example is the same as that of the plate-shaped light guide 30.

  That is, the plate-shaped light guide 30 ′ extends horizontally in the vehicle width direction so as to be displaced rearward from the right end surface 30c ′ toward the left end surface 30d ′, and has a front surface 30a ′ and a rear surface 30b ′. Is arranged in a state inclined to the rear side with respect to the vertical plane including the required direction.

  In addition, the rear surface 30b ′ of the plate-shaped light guide 30 ′ has a plurality of light for reflecting the light incident from the left end surface 30d ′ and guided through the plate-shaped light guide 30 ′ to the inner surface by total reflection. A reflective element 30s' is formed.

  The plurality of reflecting elements 30s ′ are arranged over substantially the entire rear surface 30b ′ in a state of being arranged at substantially intervals in the required direction, and each reflecting element 30s ′ has a wedge-shaped cross-sectional shape and intersects the required direction. It is formed as a concave groove extending to

  However, in this plate-shaped light guide 30 ′, each reflecting element 30s ′ is formed so as to extend in the vertical direction from the lower end surface 30f ′ to the upper end surface 30e ′ in the front view of the lamp.

  FIGS. 5A and 5B are views similar to FIG. 4A showing how the plate-like light guides 30 and 30 ′ shine when the light source 20 is turned on.

  As shown in FIG. 5A, in the plate-shaped light guide 30 of the present embodiment, the light guided through the plate-shaped light guide 30 after being emitted from the light source 20 and incident from the left end surface 30d. The plate-shaped light guide 30 appears to shine in a streak pattern by being internally reflected by the plurality of reflective elements 30s and emitted from the front surface 30a.

  On the other hand, as shown in FIG. 5B, also in the conventional plate-shaped light guide 30 ′, after being emitted from the light source 20 and incident from the left end surface 30d ′, the light is guided through the plate-shaped light guide 30 ′. The light to be reflected is internally reflected by the plurality of reflecting elements 30 s ′ and emitted from the front surface 30 a ′, so that the plate-like light guide 30 ′ appears to shine in a streak shape.

  At that time, the bright portion B ′ that appears to shine in a streak-like manner in the conventional plate-shaped light guide 30 ′ is inclined obliquely downward from the vicinity of the left end surface 30 d ′ toward the right end surface 30 c ′ and is formed on the lower end surface 30 f ′. While extending to the vicinity, it extends obliquely downward from the vicinity of the upper end surface 30e ′ to the vicinity of the right end surface 30c ′.

  Thus, the bright portion B ′ that appears to shine in a streak-like manner is formed in a state of being inclined obliquely downward at two locations because the front surface 30a ′ and the rear surface 30b ′ of the plate-shaped light guide 30 ′ are required as described above. This is because each reflecting element 30s' is formed so as to extend in the vertical direction when viewed from the front of the lamp while it is inclined rearward with respect to the vertical plane including the direction.

  Note that, depending on the inclination angle of the front surface 30a 'and the rear surface 30b', the bright portion B 'which appears to be shining in a streak shape is formed in one place or three or more places.

  On the other hand, as shown in FIG. 5 (a), the bright portion B that appears to be streak-like in the plate-like light guide 30 of the present embodiment is substantially horizontal from the vicinity of the left end face 30d to the vicinity of the right end face 30c. Extending in the direction.

  In this way, the bright portion B that appears to shine in a streak-like manner is formed so as to extend in a substantially horizontal direction because the front surface 30a and the rear surface 30b of the plate-like light guide 30 are in a vertical plane including the required direction. Each reflecting element 30s is inclined rightward with respect to the vertical direction from the lower end surface 30f of the plate-like light guide 30 toward the upper end surface 30e in a front view of the lamp so as to correspond to the inclination to the rear side. This is because the end portion located on the rear side of the both end portions of each reflective element 30s extends in the direction inclined toward the light source 20 relative to the end portion located on the front side.

  Next, the effect of this embodiment is demonstrated.

  In the lamp 10 according to the present embodiment, a plate-shaped light guide 30 that guides light incident from the light source 20 in a required direction, and a plurality of light beams that are guided through the plate-shaped light guide 30 are formed on the rear surface 30b. The reflection element 30s is internally reflected and emitted from the front face 30a, and the plurality of reflection elements 30s are arranged in the required direction so as to extend in a direction crossing the required direction. However, the plate-like light guide 30 is arranged in a state where the front surface 30a and the rear surface 30b are inclined with respect to the vertical plane including the required direction, and each reflection element 30s is in front of the lamp. In the direction inclined rightward with respect to the vertical direction from the lower end surface 30f to the upper end surface 30e of the plate-shaped light guide 30 (that is, the end portion located on the rear side of both end portions of each reflective element 30s is the front side) Since extends inclined direction) so that the light source 20 nearer end located, it is possible to obtain the following effects.

  That is, the plate-shaped light guide 30 is arranged with its front surface 30a and rear surface 30b inclined with respect to the vertical plane including the required direction, but each reflective element 30s is a plate-shaped light guide in the front view of the lamp. 30 extends from the lower end surface 30f to the upper end surface 30e in a direction inclined to the right side with respect to the vertical direction, so that when the lamp 10 in a state where the light source 20 is lit is observed from the front, a plate-shaped light guide It is possible to make 30 appear to shine in a streak pattern substantially along the required direction. As a result, the appearance of the lamp can be kept intact.

  As described above, according to the present embodiment, in the lamp 10 including the plate-shaped light guide 30 that guides the light incident from the light source 20 in the required direction, the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are in the required direction. Even when it is arranged in a state inclined with respect to a vertical plane including the light source 20, it is possible to prevent the appearance when the lamp 10 in a state where the light source 20 is lit is observed from the front. .

  In the said embodiment, although each reflective element 30s was demonstrated as what was formed as a ditch | groove part, it can also be set as the structure formed as a protruding item | line part.

  In the said embodiment, although demonstrated as what was arrange | positioned so that the plate-shaped light guide 30 might extend horizontally in a vehicle width direction, it can also be set as the structure arrange | positioned so that it may extend in an up-down direction or diagonally. It is.

  In the above embodiment, the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are inclined rearward with respect to the vertical plane including the required direction, and each reflecting element 30s is inclined rightward in the lamp front view. However, on the contrary, the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are inclined forward with respect to the vertical surface including the required direction, and each reflection is performed. It is also possible to adopt a configuration in which the element 30s extends in a direction inclined to the left in the front view of the lamp.

  Even when such a configuration is adopted, the plate-like light guide 30 can be seen to shine in a streak pattern substantially along the required direction.

  In the above embodiment, the case where the lamp 10 is a clearance lamp provided at the left front end portion of the vehicle has been described. However, vehicle lamps other than the clearance lamp (for example, daytime running lamp, tail lamp, stop lamp, turn signal) Lamp, room lamp, etc.), and further, a lamp other than the vehicular lamp may be used.

  Next, a modification of the above embodiment will be described.

  First, a first modification of the above embodiment will be described.

  FIG. 6 (a1) is a view similar to FIG. 4 (a), showing the main components of the vehicular lamp according to this modification. FIG. 6A2 is a cross-sectional view taken along line a2-a2 in FIG.

  As shown in these drawings, the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the plate-shaped light guide 130 and the number of light sources 20 are different from those of the above embodiment. Yes.

  That is, the plate-shaped light guide 130 of the present modification extends in the same required direction as the plate-shaped light guide 30 of the above embodiment, and the front surface 130a and the rear surface 130b are inclined rearward. This is different from the above-described embodiment in that the upper region 130A and the lower region 130B having different inclination angles are provided.

  At that time, the backward inclination angle α1 of the lower region 130B is set to the same value as the backward inclination angle α of the plate light guide 30 of the above embodiment, and the backward inclination angle α2 of the upper region 130A is the backward inclination angle. A value larger than α1 is set.

  Further, also in the plate-shaped light guide 130 of this modification, a plurality of reflective elements 130s are arranged on the rear surface 130b over substantially the entire area of the rear surface 130b in a state of being arranged at substantially intervals in the required direction, and Each reflective element 130s is inclined to the right with respect to the vertical direction when the lamp is viewed from the front. At that time, the side inclination angle θ1 of the portion located in the lower region 130B is set to the same value as the side inclination angle θ of each reflective element 30s of the above embodiment, and the side of the portion located in the upper region 130A The side inclination angle θ2 is set to a value larger than the side inclination angle θ1.

  In the present modification, the two light sources 20 are arranged with their light emitting surfaces 20a facing the upper region 130A and the lower region 130B on the left end surface 130d of the plate-shaped light guide 30.

  FIG. 7A is a view similar to FIG. 6A1 showing how the plate-shaped light guide 130 shines when the light source 20 is turned on.

  As shown in FIG. 7A, in the plate-like light guide 130, after being emitted from each light source 20 and entering from the left end face 130d, the upper region 130A and the lower region 130B in the plate-like light guide 130 are obtained. The light guided inside is internally reflected by the plurality of reflecting elements 130s and emitted from the front surface 130a, so that the plate-like light guide 130 appears to shine in a streak shape in each of the upper region 130A and the lower region 130B.

  At that time, the bright portion B1 that appears to shine in a streak manner in the lower region 130B extends in a substantially horizontal direction from the vicinity of the left end surface 130d to the vicinity of the right end surface 130c, and also appears to shine in a streak manner in the upper region 130A. The bright portion B2 extends in a substantially horizontal direction from the vicinity of the left end surface 130d to the vicinity of the right end surface 130c.

  In this manner, the bright portions B1 and B2 that appear to shine in a streak form are formed so as to extend substantially in the horizontal direction because each reflecting element 130s corresponds to the rear inclination angle α1 in the lower region 130B. This is due to the fact that the upper region 130A extends at a lateral inclination angle θ1 and the lateral inclination angle θ2 corresponding to the rearward inclination angle α2.

  By adopting the configuration of this modified example, when the lamp with the light source 20 turned on is observed from the front, the upper region 130A and the lower region 130B of the plate-shaped light guide 130 have different rearward inclination angles. In spite of being present, each of the upper region 130A and the lower region 130B can be seen to shine in a streak pattern substantially along the required direction.

  Next, a second modification of the above embodiment will be described.

  FIG. 6 (b1) is a view similar to FIG. 4 (a), showing the main components of the vehicular lamp according to this modification. FIG. 6B2 is a cross-sectional view taken along line b2-b2 of FIG.

  As shown in these drawings, the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the plate-shaped light guide 230 and the number of light sources 20 are different from those of the above embodiment. Yes.

  That is, the plate-shaped light guide 230 of the present modification extends in the same required direction as the plate-shaped light guide 30 of the above-described embodiment, and the front surface 230a and the rear surface 230b are inclined rearward. It differs from the case of the said embodiment by the point provided with the upper area | region 230A and the lower area | region 230B in which the inclination angle was mutually reverse.

  In that case, as for the upper area | region 230A, the back inclination angle (alpha) 3 is set to the same value as the back inclination angle (alpha) of the plate-shaped light guide 30 of the said embodiment. On the other hand, the lower region 230B has a vertically symmetrical shape with the upper region 230A, and therefore the rearward inclination angle α4 is set to the same value as the rearward inclination angle α3.

  Also in the plate-like light guide 230 of this modification, a plurality of reflective elements 230s are arranged on the rear surface 230b over substantially the entire area of the rear surface 230b in a state of being arranged at substantially intervals in the required direction. In each of the reflecting elements 130s, a portion located in the upper region 230A is inclined to the right with respect to the vertical direction and a portion located in the lower region 130B is inclined to the left with respect to the vertical direction when the lamp is viewed from the front.

  At that time, the side inclination angle θ3 of the portion located in the upper region 230A is set to the same value as the side inclination angle θ of each reflecting element 30s of the above embodiment, and the side of the portion located in the lower region 130B is set. The side inclination angle θ4 is set to the same value as the side inclination angle θ3.

  In the present modification, the two light sources 20 are arranged with their light emitting surfaces 20a facing the upper region 230A and the lower region 230B on the left end surface 30d of the plate-like light guide 30.

  FIG. 7B is a view similar to FIG. 6B1 showing how the plate-shaped light guide 230 shines when the light source 20 is turned on.

  As shown in FIG. 7B, in the plate-like light guide 230, after being emitted from each light source 20 and entering from the left end face 230d, the upper region 230A and the lower region 230B in the plate-like light guide 230 are obtained. The light guided inside is internally reflected by the plurality of reflecting elements 230s and emitted from the front surface 230a, so that the plate-like light guide 230 appears to shine in a streak shape in each of the upper region 230A and the lower region 230B.

  At that time, the bright portion B3 that appears to shine in a streak manner in the upper region 230A extends in a substantially horizontal direction from the vicinity of the left end surface 230d to the vicinity of the right end surface 230c, and also appears to shine in a streak manner in the lower region 230B. The bright portion B4 extends in a substantially horizontal direction from the vicinity of the left end surface 230d to the vicinity of the right end surface 230c.

  As described above, the bright portions B3 and B4 that appear to shine in a streak form are formed so as to extend substantially in the horizontal direction because each reflecting element 230s is on the side corresponding to the rearward inclination angle α3 in the upper region 230A. This is due to the fact that the lower region 230B extends at a side inclination angle θ4 corresponding to the rearward inclination angle α4.

  By adopting the configuration of this modification, when the lamp with the light source 20 turned on is observed from the front, the rearward inclination angles of the upper region 230A and the lower region 130B in the plate-shaped light guide 230 are upside down. In spite of this, it is possible to make each of the upper region 230A and the lower region 230B shine in a streak shape substantially along the required direction.

  Next, a third modification of the above embodiment will be described.

  Fig.8 (a) is a figure similar to Fig.4 (a) which shows the main components of the vehicle lamp which concerns on this modification.

  As shown in FIG. 8A, the basic configuration of this modification is the same as that of the above embodiment, but the shape of the left end surface 330d of the plate-shaped light guide 330 is different from that of the above embodiment. Further, between the left end surface 330d (that is, one end surface in the required direction) and the light source 20, the emitted light from the light source 20 is directed to the left end surface 330d of the plate-like light guide 330 as substantially parallel light. It differs from the case of the said embodiment by the point by which the light control member 340 comprised so that it may radiate | emit is arrange | positioned.

  The light control member 340 is configured as a transparent synthetic resin molded product made of acrylic resin or the like.

  The light control member 340 is configured as a plate member disposed on the same plane as the plate light guide 30.

  The light control member 340 is configured so that light emitted from the light source 20 is incident from the first surface 340a and then emitted from the second surface 340b.

  The first surface 340a of the light control member 340 has a central region 340a1 where light from the light emission center of the light source 20 is incident as parallel light, and a direction in which light from the light emission center of the light source 20 is separated on both sides of the central region 340a1. And a peripheral region 340a2 that is internally reflected by total reflection as parallel light traveling toward the first surface 340a.

  On the other hand, the second surface 340b of the light control member 340 is configured by a plane arranged at substantially equal intervals from the left end surface 330d of the plate-like light guide 330, and is incident from the central region 340a1 of the first surface 340a. The substantially parallel light and the substantially parallel light reflected by the peripheral region 340a2 are directly incident on the left end surface 330d of the plate-like light guide 330 as substantially parallel light.

  On the left end surface 330d of the plate-shaped light guide 330, a plurality of lens elements 330g are formed side by side in the width direction. Each lens element 330g is formed in a convex cylindrical lens shape extending in the plate thickness direction of the plate-like light guide 330. The plurality of lens elements 330 g allow the emitted light from the light control member 340 to enter the plate light guide 330 as light that diffuses in the width direction of the plate light guide 330.

  Thereby, in the plate-like light guide 330, the substantially parallel light emitted from the light control member 340 and reaching the entire region of the left end surface 330d is incident as light diffused in the width direction by the plurality of lens elements 330g. The plate-shaped light guide 330 is guided toward the right end surface 230c.

  FIG. 8B is a view similar to FIG. 8A showing how the plate-like light guide 330 shines when the light source 20 is turned on.

  As shown in FIG. 8B, in the plate-shaped light guide 330, the light emitted from the light source 20 through the light control member 340 enters the plate-shaped light guide 330 after entering from the left end surface 330d. Is reflected internally by a plurality of reflecting elements 330s formed on the rear surface 330b and emitted from the front surface 330a, so that the plate-like light guide 330 shines in a band shape as a substantially uniform bright portion B5 over substantially the entire width. appear.

  This is because the light emitted from the light control member 340 reaches the entire region of the left end surface 230d of the plate-shaped light guide 330 as parallel light, and is diffused in the width direction by the plurality of lens elements 330g formed on the left end surface 230d. This is because the light is guided through the plate-like light guide 330.

  By adopting the configuration of this modified example, the light incident from the light source 20 via the light control member 340 is light that is substantially evenly distributed in the width direction of the plate-shaped light guide 330. Therefore, the light emitted from the front surface 330a can be light emitted from a wide range. Therefore, when the lamp with the light source 20 turned on is observed from the front, the plate-like light guide 330 can be seen to shine in a strip shape instead of a streak, thereby improving the appearance of the lamp. be able to.

  In the third modification, each lens element 330g has been described as being formed in a convex cylindrical lens shape, but a configuration in which the lens element 330g is formed in a concave cylindrical lens shape or the like is also possible.

  In addition, the numerical value shown as a specification in the said embodiment and its modification 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-described embodiment and its modifications, and a configuration with various other changes can be adopted.

DESCRIPTION OF SYMBOLS 10 Lamp 12 Lamp body 14 Translucent cover 16 Extension member 20 Light source 20a Light emission surface 30,130,230,330 Plate-shaped light guide 30a, 130a, 230a, 330a Front surface 30b, 130b, 230b, 330b Rear surface 30c, 130c, 230c , 330c Right end surface 30d, 130d, 230d, 330d Left end surface 30e Upper end surface 30f Lower end surface 30s, 130s, 230s, 330s Reflective element 130A, 230A Upper region 130B, 230B Lower region 330g Lens element 340 Light control member 340a First surface 340a1 Central region 340a2 Peripheral region 340b Second surface B, B1, B2, B3, B4, B5 Bright part α, α1, α2, α3, α4 Backward tilt angle θ, θ1, θ2, θ3, θ4 Side tilt angle

Claims (4)

In a lamp provided with a light source and a plate-shaped light guide that guides light incident from the light source in a required direction,
The plate-like light guide is internally reflected by a plurality of reflecting elements formed on the rear surface of the plate-like light guide and emitted from the front surface of the plate-like light guide. Is configured to let
The plurality of reflective elements are arranged in a state aligned in the required direction so as to extend in a direction intersecting the required direction,
The plate-shaped light guide is disposed in a state where the front and rear surfaces of the plate-shaped light guide are inclined with respect to the vertical plane including the required direction,
Each of the reflecting elements extends in an inclined direction so that an end located on the rear side of both ends of the reflecting element is closer to the light source than an end located on the front side. Lamp to do. The plate-shaped light guide includes a plurality of regions having different inclination angles in a cross section orthogonal to the required direction,
2. The lamp according to claim 1, wherein a direction in which each of the reflecting elements extends is set to a different direction for each of the regions.   The lamp according to claim 2, wherein the plurality of regions include two regions inclined in opposite directions with respect to a vertical plane including the required direction. The plate-shaped light guide is configured to make light emitted from the light source incident from one end surface of the plate-shaped light guide in the required direction,
A light control member configured to emit light emitted from the light source as substantially parallel light toward one end surface of the plate light guide between the light source and one end surface of the plate light guide. Is placed,
A plurality of lens elements are formed on one end surface of the plate-shaped light guide so that light emitted from the light control member is incident as light diffusing in the width direction of the plate-shaped light guide. The lamp according to any one of claims 1 to 3.

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