JP2019164977A - Vehicular lighting fixture - Google Patents

Abstract

To improve the design during lighting of the lighting fixture in the vehicular lighting fixture equipped with a tabular transparent material.SOLUTION: After the light from a light source 40, incidents on a bend 34 of a tabular transparent material 30 via a rod-like transparent material 42, is totally reflected by a plurality of reflective elements 34s formed on a first plate surface 34b, the light is emitted from a second plate surface 34a toward the front of the lighting fixture. At this time, the plurality of reflective elements 34s are disposed in a state of being continuously arranged along each of a plurality of lines L extending in the required direction so that the tabular transparent material 30 looks like it shines linearly along each line L. In addition, by setting the surface shape of each reflective element 34s to be concave spherical, the total reflection in each reflective element 34s is performed substantially equally toward all directions. And even if the eyeshot direction when observing the tabular transparent material 30 is largely changed, the state where the tabular transparent material 30 looks like it shines linearly along the line L is maintained, as if an optical fiber looks like it shines.SELECTED DRAWING: Figure 6

Description

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

  Conventionally, light from a light source incident on a plate-shaped light guide is totally reflected by a plurality of reflecting elements formed on the first plate surface, and then emitted from the second plate surface toward the front of the lamp. A vehicular lamp configured as described above is known.

  In “Patent Document 1”, as such a vehicular lamp, light emitted from a plurality of light sources arranged along the rear end surface of a plate-shaped light guide is made incident on the plate-shaped light guide from the rear end surface. What is configured in this way is described.

JP 2013-16386 A

  By adopting the configuration described in “Patent Document 1”, it is possible to make the plate-like light guide appear to emit light substantially uniformly when the lamp is viewed from the front.

  On the other hand, if the configuration includes a side-emitting optical fiber as a vehicular lamp, it is possible to enhance the design of the lamp when the optical fiber appears to shine linearly. It is not easy to realize a specific structure for entering the optical fiber from its end face.

  On the other hand, in a vehicular lamp provided with a plate-shaped light guide, the configuration of the plate-shaped light guide includes a configuration in which a thin groove-like reflective element is formed on the plate surface on the rear side of the lamp, or a plurality of reflective elements. If it is set as the structure formed in series arrangement | positioning, or the structure by which embossing was given to the plate | board surface of the lamp front side, it will become possible to implement | achieve linear light emission.

  However, in the former two configurations, the line-of-sight direction in which the plate-like light guide shines linearly is limited, and the latter configuration cannot ensure sufficient brightness. Therefore, it is not possible to realize a way of shining like an optical fiber, and therefore, it is not possible to improve the design when the lamp is turned on.

  This invention is made | formed in view of such a situation, Comprising: In the vehicle lamp provided with the plate-shaped light guide, providing the vehicle lamp which can improve the design property at the time of lamp lighting is provided. It is the purpose.

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

That is, the vehicular lamp according to the present invention is
In a vehicle lamp provided with a light source and a plate-shaped light guide,
After the plate-like light guide body totally reflects the light from the light source incident on the plate-like light guide body with a plurality of reflecting elements formed on the first plate surface of the plate-like light guide body, It is configured to emit light from the second plate surface of the plate-shaped light guide toward the front of the lamp,
The plurality of reflective elements are arranged in a state of being continuously arranged along a line extending in a required direction,
Each of the reflecting elements has a substantially concave spherical surface shape or a substantially convex spherical surface shape.

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

  The “plate-shaped light guide” is the second plate surface after the light from the light source incident on the plate-shaped light guide is totally reflected by a plurality of reflecting elements formed on the first plate surface. If it is comprised so that it may radiate | emit toward the front of a lamp, the specific shape will not be specifically limited.

  The specific direction of the “required direction” is not particularly limited.

  Of course, the above-described “continuous arrangement along the line” includes a state in which a plurality of reflective elements are in close contact with each other. If the plate-like light guide is in a range where the light guide appears to shine linearly, a state where the plurality of reflective elements are slightly separated from each other is also included.

  The “substantially concave spherical shape” means a concave curved surface having a spherical surface or a shape close thereto (for example, an elliptical spherical surface or a polyhedron).

  The “substantially convex spherical shape” means a convex curved surface having a spherical surface or a shape close thereto (for example, an elliptical spherical surface or a polyhedron).

  In the vehicular lamp according to the present invention, light from a light source incident on a plate-shaped light guide is totally reflected by a plurality of reflecting elements formed on the first plate surface, and then the lamp is started from the second plate surface. The plurality of reflecting elements are arranged in a state of being continuously arranged along a line extending in a required direction, and each reflecting element has a substantially concave spherical shape or a shape. Since it has a convex spherical surface shape, the following effects can be obtained.

  That is, since a plurality of reflective elements are continuously arranged along the line on the first plate surface of the plate-like light guide, light from the light source incident on the plate-like light guide is received. The plate-like light guide can be seen to shine linearly along the line by being totally reflected by each reflecting element and emitted from the second plate surface toward the front of the lamp.

  At this time, each reflection element formed on the first plate surface of the plate-shaped light guide has a surface shape of a substantially concave spherical shape or a substantially convex spherical shape, so that total reflection at the reflection element is in any direction. Will be carried out substantially evenly. For this reason, even if the line-of-sight direction when observing the plate-shaped light guide is greatly changed, it is possible to maintain the state where the plate-shaped light guide appears to shine linearly along the line. Therefore, it is possible to make the optical fiber appear to shine when the lamp is turned on (that is, when the light source is turned on), thereby improving the design of the vehicular lamp.

  As described above, according to the present invention, in the vehicular lamp provided with the plate-like light guide, it is possible to improve the designability when the lamp is turned on.

  At that time, in order for the plurality of reflecting elements arranged along the line to make the optical fiber appear to shine when the lamp is turned on, the width of the line should be set to a value of about 0.25 to 2 mm. Is preferred.

  Each of the reflecting elements may be formed in a substantially concave spherical shape, or may be formed in a substantially convex spherical shape. However, when the reflecting element is formed in a substantially concave spherical shape, the reflective element has a substantially convex spherical shape. Since the total reflection efficiency of the reflecting element can be increased as compared with the case where the reflecting element is formed, it is more preferable.

  In the above configuration, if the plurality of reflective elements are arranged in parallel in a direction intersecting the required direction on the line, the line appears to shine with more uniform brightness. Can be.

  At that time, it is preferable to set the number of the reflective elements arranged in parallel to about 2 to 10 from the viewpoint of achieving both the uniform light emission of the line and the processing accuracy of the surface shape of the reflective element.

  In the above configuration, if the region where at least a plurality of reflective elements is formed as a first plate surface is formed into a curved surface, the line is arranged so as to be curved and extend three-dimensionally. It becomes possible easily. As a result, it is possible to enhance the design effect of making the optical fiber appear to shine when the lamp is turned on.

  In the above configuration, if a plurality of the lines are arranged at intervals in the direction intersecting the required direction, it will appear as if a plurality of optical fibers are discretely arranged when the lamp is turned on. This can further enhance the effect of the design.

  At that time, in order to enhance the effect of shining in a state where a plurality of optical fibers are discretely arranged, it is preferable to set the interval between the lines in the required direction to a value larger than the width of the lines. .

  In the above configuration, the rod-shaped light guide is provided with a rod-shaped light guide, and the rod-shaped light guide is disposed along the end surface in the required direction of the plate-shaped light guide, and the light source is disposed in the rod-shaped light guide. It is configured so that light is incident on the light guide, and further, the light from the light source incident on the rod-shaped light guide is incident on the plate-shaped light guide from the end face in the required direction. Then, the following effects can be obtained.

  That is, the light source arrangement can be increased by making the light from the light source incident on the plate-like light guide through the rod-like light guide. Further, by adopting such a configuration, even when a plurality of the lines are arranged at intervals in a direction intersecting the required direction, a plurality of reflections arranged along the plurality of lines are provided. It is possible to easily allow the light from the light source to reach the element efficiently.

  In the above configuration, if a plurality of sets of light sources and plate-shaped light guides are arranged in a state where they are spaced in the front-rear direction of the lamp, each plate-shaped light guide appears to shine linearly along the line. Since the portion exists at a plurality of locations in the front-rear direction of the lamp, it is possible to produce a light emitting state with a sense of depth when the lamp is turned on.

  In the above configuration, the second light source and the second rod-shaped light guide are provided, and the plate-like light guide has a front end surface and a rear end surface as end surfaces in a direction crossing the required direction. Thus, the second rod-shaped light guide is disposed in a state extending along the rear end surface of the plate-shaped light guide, and the second light source is disposed so that light is incident on the second rod-shaped light guide. Further, the light from the second light source incident on the second rod-shaped light guide is configured to enter the plate-shaped light guide from the rear end surface, and the light incident on the plate-shaped light guide is If the light from the two light sources is emitted from the front end face toward the front of the lamp, the following effects can be obtained.

  That is, when the lamp is turned on, the light guide and the second light source are turned on simultaneously so that the plate-like light guide shines linearly along the line and the front end face of the plate-like light guide appears to be a strip. This can further improve the design of the vehicular lamp.

  In the above-described configuration, the plurality of auxiliary reflection elements are continuously provided along the line at positions adjacent to the plurality of reflection elements arranged along the line on the first plate surface of the plate-shaped light guide. If the plurality of auxiliary reflecting elements are formed in a stepped manner in the required direction after being arranged in a lined state, the following operational effects can be obtained.

  That is, since a plurality of auxiliary reflecting elements are additionally arranged on the first plate surface of the plate-like light guide in a state of being continuously arranged along the line, the light from the light source incident on the plate-like light guide When light is totally reflected by each auxiliary reflecting element and emitted from the second plate surface toward the front of the lamp, the emitted light can be given directivity, thereby improving the light distribution performance as a vehicular lamp. Is easily possible.

  At this time, the plurality of auxiliary reflecting elements are arranged along the line at positions adjacent to the plurality of reflecting elements arranged along the line, so that the optical fiber can be seen as if it is lit. The light distribution performance as a vehicular lamp can be enhanced while maintaining the design effect of the design.

  In the case of adopting such a configuration, the plurality of auxiliary reflecting elements arranged along the line are sandwiched from both sides in the direction intersecting the required direction by the plurality of reflecting elements arranged along the line. If the configuration is arranged in such a state, it is possible to enhance the light distribution performance as a vehicular lamp while enhancing the design effect of making the optical fiber appear to shine when the lamp is turned on.

  Further, in the case of adopting such a configuration, if a plurality of reflective elements and a plurality of auxiliary reflective elements adjacent to each other on the line are arranged in a state shifted by a half pitch with respect to the required direction, It can be suppressed that the width of the line is widened by additionally arranging a plurality of auxiliary reflecting elements on the line.

The front view which shows the vehicle lamp which concerns on 1st Embodiment of this invention. II-II sectional view of FIG. The perspective view which shows the lamp unit of the said vehicle lamp FIG. 3 is a view taken in the direction of the arrow IV in FIG. 3 showing the main part of the plate-shaped light guide in the lamp unit. VV line sectional view of FIG. The front view which shows the said lamp unit in the lamp lighting state The same figure as FIG. 3 which shows the 1st modification of the said 1st Embodiment. The same figure as FIG. 6 which shows the effect | action of the said 1st modification. The same figure as FIG. 4 which shows the 2nd modification of the said 1st Embodiment. The figure which shows the 3rd and 4th modification of the said 1st Embodiment, and is substantially the same as FIG. The side view which shows the lamp unit of the vehicle lamp which concerns on 2nd Embodiment of this invention. 11A is a view showing the XIIa portion of FIG. 11 as seen from the rear side of the lamp, FIG. 11B is a sectional view taken along the line bb of FIG. 11A, and FIG. 11C is a sectional view taken along the line cc of FIG. The same figure as Fig.12 (a) which shows the 1st-3rd modification of the said 2nd Embodiment. The same figure as FIG. 11 which shows the 4th modification of the said 2nd Embodiment. FIG. 15 is a cross-sectional view taken along line XV-XV in FIG. 14, where (a) shows a cross-sectional shape of the auxiliary reflecting element, and (b) shows a cross-sectional shape of the reflecting element. FIG. 6 is a view substantially similar to FIG. 5 showing the main part of the plate-shaped light guide in the lamp unit of the vehicular lamp according to the third embodiment of the present invention.

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

  First, a first embodiment of the present invention will be described.

  FIG. 1 is a front view showing a vehicular lamp 10 according to this embodiment, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

  In these drawings, the direction indicated by X is “front” as the vehicle lamp 10 (“rear” for vehicles), and the direction indicated by Y is “right” (also “right” for vehicles). , Z is the “upward direction”. The same applies to other figures.

  A vehicular lamp 10 according to the present embodiment is a tail lamp disposed at a right rear end portion of a vehicle, and is formed by a lamp body 12 and a transparent translucent cover 14 attached to a front end opening portion thereof. The lamp unit 20 is incorporated in the lamp chamber.

  The translucent cover 14 is formed so as to wrap around the lamp from the left end portion toward the right end portion.

  FIG. 3 is a perspective view showing the lamp unit 20 taken out.

  As shown also in the figure, the lamp unit 20 includes a plate-shaped light guide 30, a pair of upper and lower light sources 40 and a rod-shaped light guide 42, a second light source 50, and a second rod-shaped light guide 52. And has a vertically symmetrical configuration.

  The plate-shaped light guide 30 is a member made of transparent resin (for example, acrylic resin), and is supported by the lamp body 12 by a support structure (not shown). The plate-shaped light guide 30 includes a flat plate portion 32 extending in the vehicle width direction along a horizontal plane, and a pair of upper and lower curved portions 34 extending from the flat plate portion 32.

  The flat plate portion 32 is formed with a constant front-rear width in the left half portion, but is formed so that the front-rear width gradually decreases toward the right edge in the right half portion. That is, the front end surface 32a of the flat plate portion 32 is formed so as to extend obliquely rearward from the left end portion toward the right end portion, and the left half portion is configured by a planar vertical surface. The right half part is comprised by the convex-curved vertical surface which curves to a lamp fixture back side toward a right end edge. On the other hand, the rear end surface 32b of the flat plate portion 32 is constituted by a planar vertical surface extending in parallel with the left half portion of the front end surface 32a, and the right end portion is a concave curve that curves toward the right end edge toward the rear side of the lamp. It is composed of a curved vertical surface.

  The pair of upper and lower curved portions 34 are formed so as to bend and extend from the front end surface 32a of the flat plate portion 32 in both the upper and lower directions. That is, each of the curved portions 34 has a first plate surface 34b that forms the rear surface thereof formed in a concave curved surface shape, and a second plate surface 34a that forms the front surface thereof formed in a convex curved surface shape.

  Specifically, the curved portion 34 located on the upper side extends from the upper region in the right half of the front end surface 32a of the flat plate portion 32 in an obliquely upward direction close to the horizontal direction, and then gradually increases in upward angle. Is formed. At this time, the curved portion 34 is formed so that the thickness gradually decreases from the proximal end portion toward the distal end portion, and the most distal end portion 34c is substantially parallel to the right half portion of the front end face 32a. It is formed so as to extend along the vertical plane. Further, the left end surface 34 d of the curved portion 34 is formed so as to be smoothly curved and extend from the front end surface 32 a of the flat plate portion 32.

  A plurality of reflective elements 34 s are formed on the first plate surface 34 b of the curved portion 34. At that time, the plurality of reflective elements 34s are arranged in a state of being continuously arranged along a line L extending in a required direction.

  The required direction is set in a direction from the proximal end portion to the distal end portion of the bending portion 34, and the line L is arranged so as to extend in a curved line from the proximal end portion of the bending portion 34 to a position in the vicinity of the most distal end portion 34c. ing. A plurality of lines L (for example, about 5 to 10 lines) are provided at substantially equal intervals in the horizontal direction intersecting the required direction (specifically, the direction in which the right half of the front end surface 32a of the flat plate part 32 extends). Has been placed.

  The bending portion 34 located on the lower side has the same configuration as the bending portion 34 located on the upper side.

  In addition, the specific arrangement | positioning and the specific shape of the some reflective element 34s in each curved part 34 are mentioned later.

  The pair of upper and lower light sources 40 and the rod-shaped light guide 42 are disposed on both upper and lower sides of the pair of upper and lower curved portions 34.

  The bar-shaped light guide 42 positioned on the upper side is disposed so as to bend and extend along the tip end surface 34c1 in the vicinity of the upper end of the tip end surface 34c1 of the bending portion 34 positioned on the upper side (that is, the upper surface of the most distal portion 34c). ing.

  The rod-shaped light guide 42 has a circular cross-sectional shape, and a plurality of reflective elements 42s are continuously formed in the longitudinal direction on the outer peripheral surface. The rod-shaped light guide 42 is supported by the lamp body 12 by a support structure (not shown).

  The light source 40 located on the upper side is disposed in the vicinity of the right end surface 42 a of the rod-shaped light guide 42. The light source 40 is a red light emitting diode, and is mounted on the substrate 44 with its light emitting surface facing the right end surface 42a of the rod-shaped light guide 42. The substrate 44 is supported on the lamp body 12 by a support structure (not shown).

  The rod-shaped light guide 42 totally reflects the light from the light source 40 incident from the right end surface 42a toward the left end surface while reflecting the light from the plurality of reflecting elements 42s toward the lower side from the rod-shaped light guide 42. The light is emitted and is incident on the curved portion 34 of the plate-like light guide 30 from the front end surface 34c1.

  And in the curved part 34 of the plate-shaped light guide 30, the 1st board is guided, guiding the light from the rod-shaped light guide 42 which injected from the front end surface 34c1 toward the base end part of the curved part 34. The light is totally reflected by a plurality of reflecting elements 34s formed on the surface 34b, and emitted from the second plate surface 34a toward the front of the lamp.

  The light source 40 and the rod-shaped light guide 42 positioned on the lower side are arranged in a state where the light source 40 and the rod-shaped light guide 42 positioned on the upper side are turned upside down.

  The second light source 50 and the second rod-shaped light guide 52 are disposed on the rear side of the lamp of the flat plate portion 32 of the plate-shaped light guide 30.

  The second rod-shaped light guide 52 is disposed so as to extend along the rear end surface 32 b in the vicinity of the rear end surface 32 b of the flat plate portion 32 in the vicinity of the lamp. The second rod-shaped light guide 52 has a circular cross-sectional shape, and a plurality of reflective elements 52s are continuously formed in the longitudinal direction at the rear portion of the outer peripheral surface thereof. The second rod-shaped light guide 52 is supported on the lamp body 12 by a support structure (not shown).

  The second light source 50 is disposed in the vicinity of the right end surface 52 a of the second rod-shaped light guide 52. The second light source 50 is a red light emitting diode, and is mounted on the substrate 54 with its light emitting surface directed toward the right end surface 52 a of the second rod-shaped light guide 52. The substrate 54 is supported on the lamp body 12 by a support structure (not shown).

  The second rod-shaped light guide 52 causes the light from the second light source 50 incident from the right end surface 52a to be totally reflected by the plurality of reflecting elements 52s while guiding the light toward the left end surface. The light is emitted from 52 toward the front of the lamp, and is incident on the flat plate portion 32 of the plate-like light guide 30 from the rear end face 32b.

  And in the flat plate part 32 of the plate-shaped light guide 30, the light from the 2nd rod-shaped light guide 52 inject | emitted from the rear-end surface 32b is guide | induced to the front-end surface 32a, and toward this lamp front from this front-end surface 32a. It is made to emit.

  However, since the upper and lower regions in the right half of the front end surface 32 a of the flat plate portion 32 are connected to the pair of upper and lower curved portions 34, the second rod shape that has reached the front end surface 32 a of the flat plate portion 32. A part of the light from the light guide 52 is guided to the pair of upper and lower curved portions 34. Each curved portion 34 is formed on the first plate surface 34b while guiding light from the second rod-shaped light guide 52 incident from the base end portion thereof toward the distal end portion of the curved portion 34. Further, the light is totally reflected by the plurality of reflecting elements 34s and emitted from the second plate surface 34a toward the front of the lamp.

  As shown in FIGS. 1 and 2, an extension member 16 and a pair of upper and lower cover members 18 that partially cover the plate-shaped light guide 30 of the lamp unit 20 are disposed in the lamp chamber.

  The extension member 16 is configured as a panel-like member that covers the flat plate portion 32 of the plate-like light guide 30 at a position on the rear side of the lamp with respect to the pair of upper and lower curved portions 34. The extension member 16 is formed with a horizontally-long rectangular opening 16 a surrounding the flat plate portion 32. The extension member 16 has a laterally long rectangular outer shape when viewed from the front of the lamp, and is supported by the lamp body 12 at both right and left ends.

  The pair of upper and lower cover members 18 includes a pair of upper and lower rod-shaped light guides 42 and a light source 40 on both the upper and lower sides of the extension member 16 and the most distal portion 34 c of the pair of upper and lower curved portions 34 of the plate-like light guide 30. It is comprised as a panel-shaped member to cover. Each cover member 18 is formed with an opening 18a extending in a substantially arc shape so as to surround the most distal end portion 34c of the curved portion 34. Each cover member 18 has a laterally long rectangular outer shape when viewed from the front of the lamp, and is supported by the extension member 16 or the lamp body 12.

  4 is a view taken in the direction of the arrow IV in FIG. 3, showing the main part of the plate-shaped light guide 30. FIG. 5 is a cross-sectional view taken along the line VV of FIG.

  As shown in these drawings, the plurality of reflective elements 34 s formed on the first plate surface 34 b of each curved portion 34 are arranged in a line continuously along each of the plurality of lines L in one row. ing. At this time, the plurality of reflective elements 34 s are arranged in close contact with each other on each line L.

  Each reflective element 34s has a concave spherical surface shape, and its outer peripheral edge shape is set to a circular shape of the same size. At this time, the outer diameter D of each reflecting element 34s is set to a value slightly less than twice the radius R of the concave spherical surface (specifically, D = about 0.25 to 2 mm (for example, about 1 mm)). Yes.

  Thus, each line L has the same width W as the outer diameter D of each reflective element 34s, and a plurality of reflective elements 34s are arranged in series at the same pitch P as the outer diameter D of each reflective element 34s. Yes.

  The interval A between the plurality of lines L in the required direction is set to a value larger than the width W of each line L (for example, a value of about A = 2 W to 10 W).

  As shown in FIG. 5, in the curved portion 34 located on the lower side, the light from the light source 40 is guided upward (that is, toward the base end side of the curved portion 34) and the light from the second light source 50. Is directed downward (that is, toward the distal end side of the bending portion 34), and these lights reach each reflecting element 34s. At this time, since the light from the light source 40 and the second light source 50 arrives at each reflecting element 34s from directions other than the direction in the cross section shown in FIG. Totally reflected and emitted from the second plate surface 34a toward the front of the lamp. The same applies to the curved portion 34 located on the upper side.

  FIG. 6 is a front view showing the lamp unit 20 in the lamp lighting state.

  As shown in the figure, when the lamp unit 20 in a state in which the pair of upper and lower light sources 40 and the second light source 50 are lit is observed from the front direction of the lamp (that is, the rear of the vehicle), the flat plate of the plate-like light guide 30 The front end face 32a of the portion 32 appears to shine and a plurality of reflecting elements 34s formed on the pair of upper and lower curved portions 34 appear to shine.

  Specifically, the front end surface 32a of the flat plate portion 32 emits light from the second light source 50 incident from the rear end surface 32b via the second rod-shaped light guide 52 toward the front of the lamp from the front end surface 32a. It looks shining.

  At that time, the front end surface 32a of the flat plate portion 32 appears to shine with a wide width across the entire vertical width in the left half portion, but is sandwiched between the base end portions of the pair of upper and lower curved portions 34 in the right half portion. The part looks narrow and shiny.

  On the other hand, the plurality of reflecting elements 34 s formed in each curved portion 34 guides light from the light source 40 incident from the distal end surface 34 c 1 of the curved portion 34 through the rod-shaped light guide 42 to the proximal end side. As a result, the respective lines L appear to shine substantially uniformly over the entire length by being totally reflected by the respective reflecting elements 34 s and are incident on the rear end face 32 b of the flat plate portion 32 via the second rod-shaped light guide 52. The light from the light source 50 is totally reflected by each reflecting element 34s while being guided from the base end portion of each curved portion 34 to the distal end portion, so that each line L appears to shine brighter and more uniformly over the entire length.

  At that time, the light from the second light source 50 incident on the left end surface 34 d of each curved portion 34 from the rear end surface 32 b of the flat plate portion 32 via the second rod-shaped light guide 52 is also the base end of the curved portion 34. The light reaches the left end surface 34d in the middle of being guided from the light source to the tip and is emitted toward the front of the lamp.

  As described above, when the lamp unit 20 is observed from the front direction of the lamp, the plurality of reflecting elements 34s formed on each curved portion 34 appear to shine linearly along each of the plurality of lines L. Since 34s has a concave spherical surface shape, the light from the light source 40 and the second light source 50 is reflected even when the direction in which the lamp unit 20 is observed is shifted from the front direction of the lamp. The total reflection in all directions by the element 34s maintains the state where the plurality of reflection elements 34s appear to shine along each of the plurality of lines L.

  Next, the effect of this embodiment is demonstrated.

  The vehicular lamp 10 according to the present embodiment totally reflects light from the light source 40 incident on each curved portion 34 of the plate-like light guide 30 by a plurality of reflecting elements 34s formed on the first plate surface 34b. Then, the light is emitted from the second plate surface 34a toward the front of the lamp, but the plurality of reflective elements 34s are arranged in a line continuously along the line L extending in the required direction. In addition, since each reflecting element 34s has a substantially concave spherical surface shape, the following operational effects can be obtained.

  That is, since the plurality of reflective elements 34 s are continuously arranged along the line L on the first plate surface 34 b of each curved portion 34, the light from the light source 40 incident on each curved portion 34. Are totally reflected by each reflecting element 34s and emitted toward the front of the lamp from the second plate surface 34a, so that each curved portion 34 can be seen to shine linearly along the line L.

  At this time, since each reflecting element 34s formed on the first plate surface 34b of each curved portion 34 has a substantially concave spherical surface shape, total reflection at the reflecting element 34s is directed in all directions. It will be performed substantially evenly. For this reason, even if the line-of-sight direction when observing the plate-shaped light guide 30 is changed greatly, the state where each bending portion 34 appears to shine linearly along the line L can be maintained. Therefore, it is possible to make the optical fiber appear to shine when the lamp is turned on (that is, when the light source 40 is turned on), thereby improving the design of the vehicular lamp 10.

  Thus, according to the present embodiment, in the vehicular lamp 10 provided with the plate-like light guide 30, the designability when the lamp is lit can be improved.

  At this time, in the present embodiment, the width of the line L is set to a value of about 0.25 to 2 mm. The design effect of making it visible can be enhanced.

  In the present embodiment, since the first plate surface 34b is formed in a curved shape, the line L can be arranged so as to be curved and extend three-dimensionally. The design effect of making the optical fiber appear shining can be further enhanced.

  Moreover, in the present embodiment, since a plurality of lines L are arranged at intervals in the direction intersecting the required direction, it looks as if a plurality of optical fibers are discretely arranged when the lamp is turned on. As a result, the design effect can be further enhanced.

  At this time, in the present embodiment, the interval between the lines L in the required direction is set to a value larger than the width of the line L, so that the plurality of optical fibers appear to shine in a discrete arrangement. The effect can be enhanced.

  Further, the vehicular lamp 10 according to the present embodiment includes a rod-shaped light guide 40 as the lamp unit 20, and the rod-shaped light guide 40 is connected to the distal end surface 34c1 of each curved portion 34 (that is, the end surface in the required direction). The light source 40 is disposed so as to make light incident on the rod-shaped light guide 42, and the light from the light source 40 incident on the rod-shaped light guide 42 is disposed. Is made to be incident on each bending portion 34 from its distal end surface 34c1, and the following operational effects can be obtained.

  That is, by setting the light from the light source 40 to be incident on the curved portions 34 via the rod-shaped light guide 42 as described above, the degree of freedom of arrangement of the light source 40 can be increased. In addition, by adopting such a configuration, a plurality of lines L are arranged along the plurality of lines L even though a plurality of lines L are arranged at intervals in a direction intersecting the required direction. It is possible to easily allow the light from the light source 40 to reach the reflective element 34s.

  Furthermore, the vehicular lamp 10 according to the present embodiment includes the second light source 50 and the second rod-shaped light guide 52 as the lamp unit 20, and the flat plate portion 32 of the plate-shaped light guide 30 has the above requirements. A front end face 32a and a rear end face 32b are provided as end faces in a direction crossing the direction, and the second rod-shaped light guide 52 is disposed in a state extending along the rear end face 32b of the flat plate portion 32, and the second The light source 50 is arranged so that light is incident on the second rod-shaped light guide 52, and the light from the second light source 50 incident on the second rod-shaped light guide 52 is applied to the flat plate portion 32. Since the light from the second light source 50 that is incident from the rear end surface 32b and is incident on the flat plate portion 32 is emitted from the front end surface 32a toward the front of the lamp, the following effects can be obtained. Can do.

  In other words, when the lamp is lit, the curved portions 34 of the plate-shaped light guide 30 appear to shine linearly along each of the plurality of lines L by simultaneously lighting the light source 40 and the second light source 50 and the plate-shaped light guide. The front end surface 32a of the flat plate portion 32 of the body 30 can be made to appear as a band, and thus the design of the vehicular lamp 10 can be further enhanced.

  Moreover, the plate-shaped light guide 30 of the present embodiment is formed such that the pair of upper and lower curved portions 34 are curved and extend from the front end surface 32a of the flat plate portion 32 in both the upper and lower directions. The front end surface 32a of the flat plate portion 32 appears to shine as a bundle of optical fibers, and the plurality of reflecting elements 34s formed on the pair of upper and lower curved portions 34 appear to shine as a plurality of optical fibers extending from the bundle of optical fibers. Can be.

  At that time, the plurality of reflecting elements 34 s formed in each curved portion 34 is such that light from the light source 40 incident from the distal end surface 34 c 1 of the curved portion 34 via the rod-shaped light guide 42 is directed to the proximal end portion side. In addition to being totally reflected by each reflecting element 34 s while being guided, the light from the second light source 50 incident from the rear end surface 32 b of the flat plate portion 32 via the second rod-shaped light guide 52 is the base of each bending portion 34. Since each reflection element 34s is totally reflected while being guided from the end portion to the tip end side, each line L can be made to appear brighter and more uniformly shining over the entire length.

  In the present embodiment, the left end surfaces 34d of the pair of upper and lower curved portions 34 can also be seen as a bundle of optical fibers branched from the bundle of optical fibers.

  In the first embodiment, the case where the vehicular lamp 10 is a tail lamp has been described. However, in addition to the tail lamp, locations and functions provided in the vehicle, such as a stop lamp, a turn signal lamp, a clearance lamp, and a daytime running lamp. Regardless of this, by adopting the same configuration as that of the first embodiment, it is possible to obtain the same effects as those of the first embodiment. At that time, for example, after the vehicle lamp 10 is configured as a tail lamp & stop lamp, the light source 40 can be turned on in the tail lamp lighting mode and the second light source 50 can be additionally turned on in the stop lamp lighting mode. is there.

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

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

  FIG. 7 is a view similar to FIG. 3 showing the lamp unit 120 according to the present modification.

  As shown in the figure, the basic configuration of the present modification is the same as that of the first embodiment. However, as the configuration of the lamp unit 120, the plate-shaped light guide 30 has a plate-like shape on the rear side of the lamp. It differs from the case of the said 1st Embodiment by the point by which the light guide 130 and two sets of upper and lower light sources 140 and the rod-shaped light guide 142 are additionally arrange | positioned.

  The plate-shaped light guide 130 has a configuration in which a pair of upper and lower curved portions 134 having the same configuration as the pair of upper and lower curved portions 34 in the plate-shaped light guide 30 are integrally formed via a connecting portion 136. It has become. At that time, the bending portion 134 located on the upper side is arranged in a state shifted obliquely to the left upward with respect to the bending portion 34 located on the upper side, and the bending portion 134 located on the lower side is located on the lower side. It arrange | positions in the state which shifted | deviated to the left slanting downward direction with respect to the curved part 34 to perform.

  The upper and lower two sets of light sources 140 and the rod-shaped light guide 142 have the same configuration as that of the upper and lower two sets of light sources 40 and the rod-shaped light guide 42, and the positional relationship with the pair of upper and lower curved portions 134. Are set in the same manner as these.

  FIG. 8 is a front view showing the lamp unit 120 in the lamp lighting state.

  As shown in the figure, when the lamp unit 120 in a state where the pair of upper and lower light sources 140 and the second light source 50 are turned on together with the pair of upper and lower light sources 140 is observed from the front direction of the lamp, the plate-shaped light guide 30 Along with the front end surface 32a of the flat plate portion 32 and the plurality of reflecting elements 34s formed on the upper and lower pair of curved portions 34 and the left end surface 34d thereof, the upper and lower curved portions 134 of the plate-shaped light guide 130 are formed. The plurality of reflective elements 134s appear to shine.

  At that time, the plurality of reflecting elements 134 s formed in each curved portion 134 of the plate-shaped light guide 130 is configured such that the light from the light source 140 incident from the distal end surface 134 c 1 of the curved portion 134 via the rod-shaped light guide 142. Each line L appears to shine substantially uniformly over the entire length by being totally reflected by each reflecting element 134s while being guided to the base end side.

  By adopting the configuration of this modified example, in each plate-like light guide 30, 130, there will be portions that appear to shine linearly along a plurality of lines L in two places in the lamp front-rear direction. It is possible to produce a light emitting state with a sense of depth when the lamp is turned on.

  In the first modified example, the plate-shaped light guide 130 is described as being arranged on the rear side of the lamp of the plate-shaped light guide 30. It is also possible to adopt a configuration in which a plate-like light guide is arranged.

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

  FIG. 9 is a view similar to FIG. 4 showing the main part of the plate-shaped light guide 230 according to this modification.

  As shown in FIG. 9, the basic configuration of this modification is the same as that of the first embodiment, but a plurality of components formed on the first plate surface 234 b of the curved portion 234 of the plate-like light guide 230. The reflective elements 234 s are different from those of the first embodiment in that the reflective elements 234 s are arranged in two rows along each of the plurality of lines L.

  Also in this modified example, each reflective element 234s has a concave spherical surface shape as in the case of the first embodiment, and its outer peripheral edge shape is set to a circular shape of the same size.

  At that time, the plurality of reflective elements 234s located on the inner peripheral side in each line L are arranged in close contact with each other in the direction in which each line L extends. In addition, the plurality of reflective elements 234s positioned on the outer peripheral side in each line L are shifted toward the inner peripheral side by a half pitch in the direction in which each line L extends with respect to the plurality of reflective elements 234s positioned on the inner peripheral side. It arrange | positions in the state closely_contact | adhered to the several reflective element 234s located. For this reason, the plurality of reflective elements 234s located on the outer peripheral side are arranged in a state slightly separated from each other in the direction in which each line L extends.

  As a result, each line L has a width W slightly less than twice the outer diameter D of each reflective element 234s, and a plurality of reflective elements 34s are alternately arranged at a pitch P that is half the outer diameter D of each reflective element 234s. It has become a thing. At that time, if the width W is to be set to the same value as in the first embodiment, the outer diameter D of each reflective element 234s is set to about half that in the first embodiment. do it.

  Also in this modification, the interval A between the plurality of lines L in the required direction is set to a value larger than the width W of each line L (for example, a value of about A = 2 W to 10 W).

  As in the present modification, when the plurality of reflective elements 234s are arranged in parallel in a direction intersecting the required direction on each line L, each line L is more uniform. You can make it appear to shine with brightness.

  In particular, as in this modification, the plurality of reflective elements 234s located on the inner peripheral side and the plurality of reflective elements 234s located on the outer peripheral side are in close contact with each other with a half-pitch deviation in the direction in which each line L extends. By adopting a configuration arranged in such a state, it is possible to make each line L appear to shine brighter with more uniform brightness.

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

  Fig.10 (a) is a figure substantially the same as FIG. 4 which shows the principal part of the plate-shaped light guide which concerns on this modification.

  As shown in FIG. 5A, the basic configuration of this modification is the same as that of the first embodiment, but in this modification, a plurality of reflective elements 334s are linearly extended lines. It differs from the case of the first embodiment in that it is arranged in a state of being continuously arranged in 5 rows along L.

  Also in this modified example, each reflective element 334s has a concave spherical surface shape as in the case of the first embodiment, and its outer peripheral edge shape is set to a circular shape of the same size.

  At that time, the plurality of reflective elements 234s constituting each column in the line L are arranged in close contact with each other in the direction in which the line L extends, and half the direction in which the line L extends between adjacent columns. They are arranged in close contact with each other with the pitch shifted.

  As a result, the line L has a width W slightly less than five times the outer diameter D of each reflecting element 334 s and a plurality of reflecting elements 34 s are arranged at a pitch P that is half the outer diameter D of each reflecting element 334 s. ing. At this time, if the width W is to be set to the same value as in the first embodiment, the outer diameter D of each reflective element 334s is about 1/5 that of the first embodiment. Should be set.

  As in this modification, a plurality of reflective elements 334s are arranged in parallel on the line L in a direction intersecting with the required direction, and a plurality of reflective elements are arranged between adjacent columns. By adopting a configuration in which 334s is arranged with a half-pitch shift in the direction in which the line L extends, it is possible to make the line L appear to shine even more brightly and with even brightness.

  Next, a fourth modification of the first embodiment will be described.

  FIG.10 (b) is a figure substantially the same as FIG. 4 which shows the principal part of the plate-shaped light guide which concerns on this modification.

  As shown in FIG. 5B, the basic configuration of this modification is the same as that of the third modification, but in this modification, the surface shape of each reflective element 434s is a concave elliptical spherical shape. This is different from the third modified example in that it is set to.

  At this time, each reflective element 434 s has an elliptical shape that is long in a direction orthogonal to the direction in which the line L extends, and all of them are formed in the same size.

  As in the present modification, each reflective element 434s has a long oval shape in a direction orthogonal to the direction in which the line L extends, so that the line L has a more uniform brightness than in the third modification. And make it appear brighter and brighter.

  Next, a second embodiment of the present invention will be described.

  FIG. 11 is a side view showing the lamp unit 520 according to the present embodiment.

  The lamp unit 520 according to the present embodiment is also a lamp unit incorporated in a tail lamp arranged at the right rear end of the vehicle, and includes a pair of upper and lower light guide units 530A and 530B and a pair of upper and lower light sources 540. And has a vertically symmetrical configuration.

  Each of the light guide units 530A and 530B is a member made of transparent resin (for example, acrylic resin), and has a configuration in which a plate-like light guide 532 and a rod-like light guide 534 are integrally formed.

  First, the configuration of the light guide unit 530A located on the upper side will be described.

  The plate-shaped light guide 532 is formed in a flat plate shape, and inclines toward the lamp rear side from the left end portion toward the right end portion, and inclines toward the lamp rear side from the lower end portion toward the upper end portion. Has been placed. The plate-shaped light guide 532 is formed with a constant vertical width and a constant horizontal width, and an overhanging portion 532c is formed on the left lower end portion so as to project leftward.

  The rod-shaped light guide 534 is formed in a columnar shape and extends linearly in the horizontal direction along the upper edge of the plate-shaped light guide 532. The left end surface of the rod-shaped light guide 534 is formed flush with the left end surface of the plate light guide 532, but the right end surface 534 a is located on the right side of the right end surface of the plate light guide 532. Yes.

  The second plate surface 532a constituting the front surface of the plate-like light guide 532 is formed in a flat shape, but the first plate surface 532b constituting the rear surface has a plurality of reflection elements 532s and a plurality of auxiliary reflection elements 532s1. Is formed. At this time, the plurality of reflecting elements 532s and the plurality of auxiliary reflecting elements 532s1 are arranged in a state of being continuously arranged along the line L extending in the required direction.

  The required direction is set obliquely upward from the lower end portion of the plate light guide 532 to the upper end portion, and the line L extends linearly from the vicinity of the lower end edge of the plate light guide body 532 to the vicinity of the upper end edge. Yes. A plurality of (for example, about five) lines L are arranged at substantially equal intervals in the horizontal direction intersecting the required direction. The plurality of lines L merge at the lower end of the plate-like light guide 532 while being curved leftward, and extend in the horizontal direction as a single line to the overhanging portion 532c.

  The specific arrangement and specific shapes of the plurality of reflecting elements 532s and the plurality of auxiliary reflecting elements 532s1 on each line L will be described later.

  The light source 540 located on the upper side is disposed in the vicinity of the right end surface 534a of the rod-shaped light guide 534 of the light guide unit 530A. The light source 540 is a red light emitting diode, and is mounted on the substrate 544 with its light emitting surface facing the right end surface 534a of the rod-shaped light guide 534.

  The rod-shaped light guide 534 is partly directed to the plate-shaped light guide 532 in the process of guiding the light from the light source 540 incident from the right end surface 534a toward the left end surface while totally reflecting the light from the peripheral surface. It is made to enter.

  In the plate-like light guide 532, the light incident from the rod-like light guide 534 is guided toward the lower end portion of the plate-like light guide 532, and the plurality of light guides formed on the first plate surface 532b. The light is totally reflected by the reflecting element 532s and the plurality of auxiliary reflecting elements 532s1, and emitted from the second plate surface 532a toward the front of the lamp.

  The light guide unit 530B located on the lower side also has the same configuration as the light guide unit 530A located on the upper side.

  The pair of upper and lower light guide units 530A and 530B is in a state where the lower end surface of the plate light guide 532 of the light guide unit 530A and the upper end surface of the plate light guide 532 of the light guide unit 530B are in contact with each other. They are integrated by bonding, welding or the like.

  FIG. 12A is a diagram showing the XIIa portion of FIG. 11 (that is, the main part of the plate-shaped light guide 532 in the light guide unit 530B located on the lower side) as viewed from the rear side of the lamp. 12B is a cross-sectional view taken along the line bb in FIG. 12A, and FIG. 12C is a cross-sectional view taken along the line cc in FIG. 12A.

  As shown in FIG. 12A, the plurality of reflective elements 532 s and the plurality of auxiliary reflective elements 532 s 1 formed on the first plate surface 532 b of the plate-shaped light guide 532 are each continuous in three rows along the line L. Are arranged side by side.

  At that time, the plurality of auxiliary reflection elements 532s1 arranged along the line L are arranged in a state of being sandwiched from both sides by the plurality of reflection elements 532s arranged along the line L.

  The plurality of reflecting elements 532s constituting each column on both sides are arranged in close contact with each other on the line L.

  Each reflective element 532s has a concave spherical surface shape, similar to the reflective element 34s of the first embodiment, and its outer peripheral edge shape is set to a circular shape of the same size.

  On the other hand, as shown in FIG. 12B, the plurality of auxiliary reflecting elements 532s1 constituting the central row are formed in a step shape in the direction in which the line L extends, and are in close contact with each other on the line L. Has been placed.

  Each auxiliary reflecting element 532s1 has a rectangular outer shape that is long in the direction in which the line L extends, and the length of the long side is set to a value about twice the diameter of the reflecting element 532s. Each auxiliary reflecting element 532s1 has an inclined flat surface portion 532s1a formed along a plane inclined downward from the first plate surface 532b.

  As shown in FIGS. 12B and 12C, in the plate-like light guide 532 of the light guide unit 530B located on the lower side, the light source 540 incident from the rod-like light guide 534 connected to the lower edge thereof. Is guided upward (that is, toward the upper edge of the plate-like light guide 532), and reaches each of the reflective elements 532s and each of the auxiliary reflective elements 532s1 in the middle thereof.

  At that time, as shown in FIG. 12 (c), the light reaching each reflecting element 532s is diffusely reflected by total reflection on the concave spherical surface, and is largely diffused from the second plate surface 532a toward the front of the lamp. Emitted as light.

  On the other hand, as shown in FIG. 12B, the light that has reached each auxiliary reflecting element 532s1 is regularly reflected by total reflection at the inclined flat surface portion 532s1a, and becomes parallel light from the second plate surface 532a toward the front of the lamp. The light is emitted as light having a close directivity.

  Next, the effect of this embodiment is demonstrated.

  The lamp unit 520 according to the present embodiment includes a pair of upper and lower light guide units 530A and 530B. On the first plate surface 532b of the plate-like light guide 532, a line L extending in a required direction is provided. The plurality of reflecting elements 532s are arranged in a continuously arranged state, and the plurality of auxiliary reflecting elements 532s1 are arranged in a continuously arranged state along the line L at positions adjacent to these elements. Since the plurality of auxiliary reflection elements 532s1 are formed in a staircase pattern in the direction in which the line L extends, the following operational effects can be obtained.

  That is, since a plurality of auxiliary reflecting elements 532s1 are additionally arranged along the line L on the first plate surface 532b of the plate-like light guide 532, the light enters the plate-like light guide 532. When the light from the light source 540 is totally reflected by each auxiliary reflecting element 532s1 and emitted from the second plate surface 532a toward the front of the lamp, the emitted light can be given directivity, and thereby the vehicle lamp As a result, it is possible to easily improve the light distribution performance.

  At this time, the plurality of auxiliary reflection elements 532s1 are arranged along the line L at positions adjacent to the plurality of reflection elements 532s arranged along the line L, so that the optical fiber appears to shine when the lamp is turned on. It is possible to enhance the light distribution performance as a vehicular lamp while maintaining the design effect of making it.

  In the present embodiment, the plurality of auxiliary reflection elements 532s1 arranged along the line L are arranged in a state sandwiched from both sides by the plurality of reflection elements 532s arranged along the line L. It is possible to enhance the light distribution performance as a vehicular lamp after enhancing the design effect of making the optical fiber appear to shine when the lamp is turned on.

  A state in which a plurality of auxiliary reflection elements 532s1 are continuously arranged along the line L at positions adjacent to the plurality of reflection elements 532s arranged in a state of being continuously arranged along the line L as in the present embodiment. It is also possible to apply the configuration arranged in (1) to the lamp unit 20 of the first embodiment, whereby the same operational effects as in this embodiment can be obtained.

  In the second embodiment, the rod-shaped light guide 534 is described as being formed in a columnar shape, but a configuration in which a plurality of reflecting elements are continuously formed in the longitudinal direction on the outer peripheral surface thereof may be employed. Is possible.

  In the said 2nd Embodiment, although the plate-shaped light guide 532 was demonstrated as what was formed in flat form, it can also be set as the structure formed along the curved surface.

  In the second embodiment, each auxiliary reflection element 532s1 has been described as having the inclined flat surface portion 532s1a. However, instead of the inclined flat surface portion 532s1a, along the curved surface inclined downward from the first plate surface 532b. It is also possible to have an inclined curved surface portion formed as described above. In this case, the directivity of the emitted light from the second plate surface 532a of the plate-like light guide 532 is weakened, but the occurrence of uneven light distribution can be suppressed.

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

  Fig.13 (a) is a figure similar to Fig.12 (a) which shows the principal part of the plate-shaped light guide which concerns on this modification.

  As shown in FIG. 13A, the basic configuration of this modification is the same as that of the second embodiment, but in this modification, a plurality of auxiliary reflections arranged along the line L are used. The second embodiment is different from the second embodiment in that a plurality of reflecting elements 632s are additionally arranged on both sides of the plurality of reflecting elements 632s arranged along the line L so as to sandwich the element 632s1.

  At this time, the plurality of reflective elements 632 s constituting each additionally arranged row are arranged in a state shifted by a half pitch in the direction in which the line L extends with respect to the plurality of reflective elements 632 s arranged inside.

  As in the present modification, a configuration in which the plurality of reflective elements 632s are arranged in two rows so as to sandwich the plurality of auxiliary reflective elements 632s1 arranged along the line L on the line L makes the line L more It can be made to shine even more brightly and more evenly.

  At this time, the plurality of reflective elements 632s constituting each additionally arranged row are arranged in a state shifted by a half pitch in the direction in which the line L extends with respect to the plurality of reflective elements 632s constituting the inner row. Therefore, it is possible to prevent the width of the line L from becoming wide due to the additional arrangement of the plurality of reflective elements 632s on the line L.

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

  FIG.13 (b) is a figure similar to Fig.12 (a) which shows the principal part of the plate-shaped light guide which concerns on this modification.

  As shown in FIG. 13B, the basic configuration of this modification is the same as that of the second embodiment, but in this modification, a plurality of auxiliary reflection elements 732s1 are arranged along the line L. The second embodiment is configured in such a manner that a plurality of reflecting elements 732 s are arranged in three rows along the line L so as to sandwich the plurality of auxiliary reflecting elements 732 s 1 in each row. It is different from the case.

  As in this modification, a plurality of auxiliary reflecting elements 732s1 are arranged in two rows along the line L, so that light having directivity emitted from the plate-shaped light guide toward the front of the lamp is provided. Therefore, the light distribution performance as a vehicular lamp can be further enhanced.

  Further, in this modification, since the plurality of reflecting elements 732s are arranged in three rows along the line L so as to sandwich the plurality of auxiliary reflecting elements 732s1 in each row, it is as if the optical fiber appears to shine when the lamp is turned on. It is possible to further enhance the effect of design on the design.

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

  FIG. 13C is a view similar to FIG. 12A, showing the main part of the plate-shaped light guide according to this modification.

  As shown in FIG. 13C, the basic configuration of this modification is the same as that of the second embodiment, but in this modification, a plurality of auxiliary reflections arranged along the line L are used. In the case of the second embodiment, the element 832s1 and the plurality of reflecting elements 832s arranged along the line L so as to sandwich them are arranged in a state shifted by a half pitch in the direction in which the line L extends. Is different.

  In addition, the present modification is different from the second embodiment in that each auxiliary reflecting element 832s1 has a substantially rhombus outer shape with rhombus corners. At that time, the width between the opposing sides in the substantially rhombus is set to a value slightly larger than the diameter of each reflecting element 832s.

  As in the case of the second embodiment, the plurality of auxiliary reflection elements 832s1 are formed in a step shape in the direction in which the line L extends, and each auxiliary reflection element 832s1 has an inclined flat surface portion 832s1a.

  In the present modification, the plurality of auxiliary reflection elements 832s1 and the plurality of reflection elements 832s are arranged in a state shifted by a half pitch in the direction in which the line L extends. The plurality of reflecting elements 832s are arranged at a slight interval in the direction in which the line L extends (specifically, a value less than half the diameter of each reflecting element 832s). ing.

  As in this modification, the plurality of auxiliary reflecting elements 832s1 arranged along the line L and the plurality of reflecting elements 832s arranged along the line L so as to sandwich them are halfway in the direction in which the line L extends. By adopting a configuration in which the pitch is shifted, it is possible to suppress the width of the line L from becoming wider due to the additional arrangement of the plurality of auxiliary reflecting elements 832s1 on the line L.

  In the present modification, the plurality of reflecting elements 832s are arranged at a slight interval in the direction in which the line L extends, but the interval is set to a value that is half or less of the diameter of each reflecting element 832s. Therefore, it is possible to make the plate light guide appear to shine linearly by the light from the light source totally reflected by the plurality of reflecting elements 832s.

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

  FIG. 14 is a view similar to FIG. 11 showing a lamp unit 920 according to this modification.

  The basic configuration of this modification is the same as that of the second embodiment, but in this modification, each light guide unit 930A, 930B is configured by only a plate-shaped light guide 932 (ie, The rod-shaped light guide 534 of the second embodiment is not provided), and the light from the two light sources 940 is directly incident on the plate-shaped light guide 932 of each of the light guide units 930A and 930B. This is different from the case of the second embodiment.

  That is, also in this modification, the plate-shaped light guide 932 of each light guide unit 930A, 930B is the same as the plate-shaped light guide 532 of the second embodiment, and the second plate surface 932a constituting the front surface thereof is A plurality of reflecting elements 932s and a plurality of auxiliary reflecting elements 932s1 are formed on the first plate surface 932b constituting the rear surface of the first plate surface 932b, and a projecting portion 932c is formed at the lower left end thereof. ing.

  On the other hand, the light guide unit 930A located on the upper side has a configuration in which two light sources 940 are arranged in the vicinity of the upper end surface 932d of the plate-like light guide 932 with a certain interval. The configuration of each light source 940 is the same as that of the light source 540 of the second embodiment, but is mounted on a common substrate 944 with its light emitting surface directed toward the end surface 932d of the plate-like light guide 932.

  A light incident portion for causing the light from the light source 940 to enter the plate light guide 932 as light close to parallel light at a position corresponding to each light source 940 on the end surface 932d of the plate light guide 932. 932e is formed.

  The light incident portion 932e includes a first incident portion 932e1 that causes light from the light source 940 to be refracted to the lower end side of the plate-shaped light guide 932 in a region near the front surface of the light source 940, and the first incident portion 932e1. A pair of second incident portions 932e2 that enter the light from the light source 940 to be refracted laterally on both sides of the first incident portion 932e1, and light from the light source 940 incident from each second incident portion 932e2 And a pair of reflecting portions 932e3 that are internally reflected by total reflection toward the portion side.

  The light guide unit 930 </ b> B and the two light sources 940 located on the lower side are configured by vertically inverting the light guide unit 930 </ b> A and the two light sources 940 located on the upper side.

  15A and 15B are cross-sectional views taken along the line XV-XV in FIG. 14, where FIG. 15A is a diagram illustrating a cross-sectional shape of the auxiliary reflective element 932s1, and FIG. 15B is a diagram illustrating a cross-sectional shape of the reflective element 932s.

  As shown in FIGS. 15A and 15B, in the plate-like light guide 932 of the light guide unit 930B located on the lower side, the light enters from the light incident part 932e formed on the lower end surface 932d thereof. Light from the light source 940 is guided upward (that is, toward the upper edge of the plate-shaped light guide 932), and reaches each of the reflecting elements 932s and each of the auxiliary reflecting elements 932s1 along the way.

  At that time, as shown in FIG. 15 (b), the light reaching each reflecting element 932s is diffusely reflected by total reflection on the concave spherical surface, and is diffused greatly from the second plate surface 932a toward the front of the lamp. Emitted as light.

  On the other hand, as shown in FIG. 15A, the light reaching each auxiliary reflecting element 932s1 is regularly reflected by total reflection at the inclined plane portion 932s1a, and becomes parallel light from the second plate surface 932a toward the front of the lamp. The light is emitted as light having a close directivity.

  Even in the case of adopting the configuration of this modification, the light from the light source 940 incident on the plate-shaped light guide 932 is totally reflected by each auxiliary reflection element 932s1 and emitted from the second plate surface 932a toward the front of the lamp. Thus, it is possible to easily improve the light distribution performance as the vehicular lamp.

  Also in this modified example, since the plurality of auxiliary reflecting elements 532s1 are arranged in a state of being sandwiched from both sides by the plurality of reflecting elements 532s, it is a design effect that makes it seem as if the optical fiber is shining when the lamp is turned on. The light distribution performance as a vehicular lamp can be enhanced while enhancing the effect.

  At this time, in this modification, since the light from the two light sources 940 is directly incident on the plate-like light guides 932 of the light guide units 930A and 930B, the optical fiber is turned on when the lamp is turned on. Can be made to appear brighter and light distribution performance as a vehicular lamp can be further enhanced.

  Next, a third embodiment of the present invention will be described.

  FIG. 16 is a view substantially the same as FIG. 5 showing the main part of the plate-shaped light guide 1030 in the lamp unit according to the present embodiment.

  The basic configuration of the lamp unit according to this embodiment is the same as that of the first embodiment, but the configuration of each bending portion 1034 in the plate-like light guide 1030 is the same as that of the first embodiment. The department is different.

  That is, also in the plate-shaped light guide 1030 of the present embodiment, the plurality of reflecting elements 1034s formed on the first plate surface 1034b of each curved portion 1034 are continuously arranged in a line along each of the plurality of lines L. Are arranged in close contact with each other on each line L.

  However, in this embodiment, each reflecting element 1034s has a convex spherical surface shape, and its outer peripheral edge shape is set to a circular shape of the same size.

  As shown in FIG. 16, in the curved portion 1034 located on the lower side, the light from the light source 40 (see FIG. 1) is guided upward and the light from the second light source 50 (see FIG. 1) is guided downward. These lights reach each reflecting element 1034s. At this time, since the light from the light source 40 and the second light source 50 also reaches each reflective element 1034s from directions other than the direction in the cross section shown in FIG. 16, these lights are transmitted in all directions in each reflective element 1034s. Total reflection.

  Therefore, even when the configuration of the present embodiment is adopted, substantially the same operational effects as in the case of the first embodiment can be obtained.

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

  Further, the present invention is not limited to the configurations described in the above embodiments and modifications thereof, and configurations in which various other changes are added can be employed.

DESCRIPTION OF SYMBOLS 10 Vehicle lamp 12 Lamp body 14 Translucent cover 16 Extension member 16a, 18a Opening part 18 Cover member 20, 120 Lamp unit 30, 130, 230 Plate-shaped light guide 32 Flat plate part 32a Front end surface 32b Rear end surface 34, 134, 234 Curved portion 34a Second plate surface 34b, 234b First plate surface 34c Most advanced portion 34c1, 134c1 Front end surface 34d Left end surface 34s, 42s, 52s, 134s, 234s, 334s, 434s Reflective element 40, 140 Light source 42, 142 Bar shape Light guide 42a Right end surface 44, 54 Substrate 50 Second light source 52 Second rod-shaped light guide 52a Right end surface 136 Connecting portion 520, 920 Lamp unit 530A, 530B, 930A, 930B Light guide unit 532, 932 Plate-shaped light guide 532a, 932a Second plate surface 532 , 932b First plate surface 532c, 932c Overhang portion 532s, 632s, 732s, 832s, 932s Reflective element 532s1, 632s1, 732s1, 832s1, 932s1 Auxiliary reflective element 532s1a, 832s1a, 932s1a Inclined flat surface portion 534 540, 940 Light source 544, 944 Substrate 932d End face 932e Light incident portion 932e1 First incident portion 932e2 Second incident portion 932e3 Reflection portion 1030 Plate-shaped light guide 1034 Bending portion 1034b First plate surface 1034s Reflective element A Interval D Outer diameter L Line P Pitch R Radius W Width

Claims (10)

In a vehicle lamp provided with a light source and a plate-shaped light guide,
After the plate-like light guide body totally reflects the light from the light source incident on the plate-like light guide body with a plurality of reflecting elements formed on the first plate surface of the plate-like light guide body, It is configured to emit light from the second plate surface of the plate-shaped light guide toward the front of the lamp,
The plurality of reflective elements are arranged in a state of being continuously arranged along a line extending in a required direction,
Each of the reflection elements has a substantially concave spherical surface shape or a substantially convex spherical surface shape.   The vehicular lamp according to claim 1, wherein the plurality of reflecting elements are arranged in parallel in a direction intersecting the required direction on the line.   3. The vehicular lamp according to claim 1, wherein the first plate surface is formed in a curved surface at least in a region where the plurality of reflection elements are formed. 4.   The vehicular lamp according to claim 1, wherein a plurality of the lines are arranged at intervals in a direction intersecting the required direction. It has a rod-shaped light guide,
The rod-shaped light guide is arranged in a state extending along the end surface in the required direction in the plate-shaped light guide,
The light source is arranged to make light incident on the rod-shaped light guide,
The rod-shaped light guide is configured to cause light from the light source incident on the rod-shaped light guide to enter the plate-shaped light guide from an end surface in the required direction. The vehicular lamp according to any one of claims 1 to 4.   The vehicular lamp according to any one of claims 1 to 5, wherein a plurality of sets of the light source and the plate-shaped light guide are arranged in a state of being spaced apart in the front-rear direction of the lamp. A second light source and a second rod-shaped light guide,
The plate-shaped light guide has a front end surface and a rear end surface as end surfaces in a direction intersecting the required direction,
The second rod-shaped light guide is arranged in a state extending along the rear end surface of the plate-shaped light guide,
The second light source is arranged to make light incident on the second rod-shaped light guide,
The second rod-shaped light guide is configured to cause light from the second light source incident on the second rod-shaped light guide to enter the plate-shaped light guide from the rear end surface,
The said plate-shaped light guide is comprised so that the light from the said 2nd light source which injected into this plate-shaped light guide may be radiate | emitted toward the front of a lamp from the said front end surface, It is characterized by the above-mentioned. The vehicle lamp according to any one of 1 to 6. A plurality of auxiliary reflection elements are arranged on the first plate surface in a state of being continuously arranged along the line at a position adjacent to the plurality of reflection elements arranged along the line,
The vehicular lamp according to any one of claims 1 to 7, wherein the plurality of auxiliary reflecting elements are formed in a stepped shape with respect to the required direction.   The plurality of auxiliary reflecting elements arranged along the line are arranged in a state of being sandwiched from both sides in a direction intersecting the required direction by the plurality of reflecting elements arranged along the line. The vehicular lamp according to claim 8.   The plurality of auxiliary reflecting elements and the plurality of auxiliary reflecting elements adjacent to each other on the line are arranged in a state shifted by a half pitch with respect to the required direction. Vehicle lamp.

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