WO2024043042A1 - 車両用灯具 - Google Patents
車両用灯具 Download PDFInfo
- Publication number
- WO2024043042A1 WO2024043042A1 PCT/JP2023/028553 JP2023028553W WO2024043042A1 WO 2024043042 A1 WO2024043042 A1 WO 2024043042A1 JP 2023028553 W JP2023028553 W JP 2023028553W WO 2024043042 A1 WO2024043042 A1 WO 2024043042A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light
- light guide
- section
- curved
- emitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/242—Light guides characterised by the emission area
- F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/249—Light guides with two or more light sources being coupled into the light guide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
- F21S43/31—Optical layout thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
- F21W2103/10—Position lights
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
- F21W2103/20—Direction indicator lights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
- F21W2103/35—Brake lights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
- F21W2103/55—Daytime running lights [DRL]
Definitions
- the present invention relates to a vehicle lamp.
- This application claims priority based on Japanese Patent Application No. 2022-133575 filed on August 24, 2022, the contents of which are incorporated herein.
- a configuration in which a light source such as a light emitting diode (LED) and a rod-shaped or plate-shaped light guide are combined is known as a vehicle lamp mounted on a vehicle.
- LED light emitting diode
- the light emitted from the light source enters the base end of the light guide, and while repeating reflection inside the light guide, the light is guided toward the tip of the light guide. let Further, the light reflected by the plurality of reflection cuts provided on the back side of the light guide is emitted from the front side of the light guide. Thereby, it is possible to cause the light emitting section provided on the front side of the light guide to emit light in a line shape or a planar shape.
- some vehicle lamps split the light at a branch part provided in the light guide, and then a branch part is installed between one side of the light guide and the other side of the light guide.
- a branch part is installed between one side of the light guide and the other side of the light guide.
- uneven brightness may occur in the light emitting part due to the difference in the optical path length of the light guided from the base end side to the distal end side.
- uneven brightness occurs in the light emitting part of the light guide, in the axial direction of the light guide, the light will be emitted more at the distal end, where the optical path length from the light source is longer, than at the proximal end, where the optical path length from the light source is shorter. It becomes relatively dark due to the attenuation of . Therefore, such brightness and darkness are recognized as brightness unevenness of the light emitting section.
- the curved part or A part of the light guided inside the branch part may not be directed toward the tip side of the light guide, but may leak out from the curved part or the branch part as stray light.
- a portion of the proximal end of the curved portion or branched portion appears to shine more intensely than the surrounding area, which is so-called spotting, which deteriorates the appearance of the vehicle lamp when it is turned on.
- aspects of the present invention provide a vehicle lamp that can improve the appearance when emitting light by preventing the occurrence of uneven brightness.
- the light guide includes a first light guide section disposed in front of the light source; an entrance part that is located on the proximal end side of the first light guide part and makes the light emitted from the light source enter the inside of the first light guide part; a branch part located on the tip side of the first light guide part; a second light guide portion extending from the branch portion toward one side in the first direction; a third light guide portion extending from the branch portion toward the other side in the first direction; a first curved part in which a part of the second light guide part is curved from the branch part toward one side in the first direction; a second curved part in which a part of the third light guide part is curved from the branch part toward the other side in the first direction; a first light guiding/emitting part located in the first curved part and
- the branching part is at least part of the boundary between the first curved part and the second curved part in a cross section in a second direction perpendicular to the axial direction of the first light guide part.
- the vehicular lamp according to item [1] above wherein the vehicular lamp is formed so as to draw a straight line.
- the branch part In the cross section in the second direction, the branch part has a length connecting two circles of the first curved part and the second curved part that are in contact with each other with two parallel tangents.
- the vehicle lamp according to item [2] above characterized in that it is formed in a circular shape.
- the first curved portion and the second curved portion extend from the straight line to a circular arc from the boundary toward their respective distal ends in a cross section taken in a third direction perpendicular to the axial direction thereof.
- the light guide is located on one side of the second light guide, and directs the light guided inside the second light guide to the other surface of the second light guide.
- a first reflective part that reflects toward the side; a first emitting section located on the other surface side of the second light guiding section and emitting the light reflected by the first reflecting section to the outside of the second light guiding section; a second light guide, which is located on one surface of the third light guide and reflects the light guided inside the third light guide toward the other surface of the third light guide; a reflective section; and a second emitting section located on the other surface side of the third light guiding section and emitting the light reflected by the second reflecting section to the outside of the third light guiding section.
- FIG. 1 is a front view showing the configuration of a vehicle lamp according to an embodiment of the present invention.
- FIG. 2 is a bottom view showing the configuration of the vehicle lamp shown in FIG. 1.
- FIG. 2 is a top view of a light source included in the vehicle lamp shown in FIG. 1.
- FIG. 2 is a cross-sectional view of the vehicle lamp taken along line IV-IV shown in FIG. 1.
- FIG. 2 is a perspective view showing the configuration of the vehicle lamp shown in FIG. 1.
- FIG. FIG. 6 is a perspective view showing the configuration of the socket with coupler, the inner lens, and the reflecting member shown in FIG. 5.
- FIG. FIG. 3 is a front view showing the configuration of a light source, an inner lens, and a reflecting member.
- FIG. 6 is a perspective view showing the structure of the coupler-equipped socket and inner lens shown in FIG. 5.
- FIG. FIG. 9 is a cross-sectional view of the inner lens taken along cut plane IX shown in FIG. 8;
- FIG. 9 is a cross-sectional view of the inner lens taken along cut plane X shown in FIG. 8;
- FIG. 9 is a cross-sectional view of the inner lens taken along cut plane XI shown in FIG. 8;
- FIG. 7 is a cross-sectional view showing a modification of the branch portion of the inner lens.
- FIG. 7 is a cross-sectional view showing a modification of the branch portion of the inner lens.
- FIG. 1 is a front view showing the configuration of the vehicle lamp 1.
- FIG. 2 is a bottom view showing the configuration of the vehicle lamp 1.
- FIG. 3 is a top view of the light source 3 included in the vehicle lamp 1.
- FIG. 4 is a cross-sectional view of the vehicle lamp 1 taken along line IV-IV shown in FIG.
- FIG. 5 is a perspective view showing the configuration of the vehicle lamp 1.
- FIG. 6 is a perspective view showing the configuration of the coupler-equipped socket 7, the inner lens 4, and the reflective member 5.
- FIG. 7 is a front view showing the configuration of the light source 3, the inner lens 4, and the reflecting member 5.
- FIG. 8 is a perspective view showing the structure of the socket with coupler 7 and the inner lens 4.
- FIG. 9 is a sectional view of the inner lens 4 taken along the cut plane IX shown in FIG.
- FIG. 10 is a sectional view of the inner lens 4 taken along the cut plane X shown in FIG.
- FIG. 11 is a sectional view of the inner lens 4 taken along the cutting plane XI shown in FIG.
- an XYZ orthogonal coordinate system is set, and the X-axis direction is the front-back direction of the vehicle light fixture 1, the Y-axis direction is the left-right direction of the vehicle light fixture 1, and the Z-axis direction is the top and bottom of the vehicle light fixture 1.
- Each direction shall be indicated.
- the vehicle lamp 1 of this embodiment is one in which the present invention is applied to, for example, a lid lamp mounted on a back gate or a trunk lid at the rear of a vehicle.
- the terms “front”, “rear”, “left”, “right”, “top”, and “bottom” refer to when the vehicle light 1 is viewed from the front (back of the vehicle), unless otherwise specified. shall mean the respective directions. Therefore, the respective directions when the vehicle is viewed from the front (vehicle front) are the directions in which the front, rear, left, and right directions are reversed.
- the vehicle lamp 1 of this embodiment has a configuration in which a light source 3, an inner lens 4, and a reflective member 5 are arranged inside a lamp body 2. .
- the lamp body 2 includes a reflective member 5 constituting a housing 5a with an open front surface, and a transparent outer lens (cover lens) 6 that covers the opening of the housing, and the lamp body 2 as a whole has a reflection member 5 constituting a housing 5a with an open front. It has an elongated shape extending in the vehicle width direction.
- the lamp body 2 has a shape that is curved from the center portion in the vehicle width direction toward both ends, in accordance with the slant shape provided at both corner portions on the rear end side of the vehicle. Note that the shape of the lamp body 2 is not limited to such a curved shape, and can be changed as appropriate depending on the design of the vehicle.
- the vehicle lamp 1 of this embodiment includes a socket 7 with a coupler in which a light source 3 is placed.
- the coupler-equipped socket 7 is inserted into the inside of the lamp body 2 through a mounting hole (not shown) provided at the bottom of the reflecting member 5 constituting the housing described above, and is detachably attached around the mounting hole. installed.
- the light source 3 has at least one or a plurality (four in this embodiment) of light emitting elements 8 that emit red light (hereinafter referred to as "light") L.
- the light emitting element 8 is made of, for example, an LED, and is mounted on the surface of a circuit board (not shown) provided with a drive circuit for driving the LED, and emits light forward (in this embodiment, upward). Emits radiation radially. Further, the plurality of light emitting elements 8 are provided on the same surface of the same circuit board, and emit light L radially in the same direction.
- the light source 3 of this embodiment as shown in FIG. 3, four light emitting elements 8 are arranged side by side in all directions, and their centers are aligned with the central axis AX of the coupler-equipped socket 7. Therefore, when a plurality of light emitting elements 8 are considered as one light source 3, the optical axis of the light source 3 is treated as coinciding with the central axis AX of the socket with coupler 7 (hereinafter referred to as the optical axis AX of the light source 3). do.
- the structure is provided with the coupler-equipped socket 7 on which the light source 3 described above is arranged, but the structure is not necessarily limited to such a structure, and the circuit board on which the light source 3 is arranged. may be arranged inside the lamp body 2.
- the inner lens 4 is made of a light guide made of transparent resin such as polycarbonate or acrylic, or glass, and is located in front of the light source 3 (socket 7 with coupler). It is located.
- the inner lens 4 has a long round bar shape extending asymmetrically in the vehicle width direction with the light source 3 (socket 7 with coupler) in between. That is, in this inner lens 4, the light source 3 (socket with coupler 7) is arranged at a position offset from the center in the vehicle width direction, and one side of the inner lens 4 with this light source 3 (socket with coupler 7) sandwiched therebetween. One side is longer than the other.
- the inner lens 4 is located in front of the light source 3 and extends in the vertical direction of the vehicle.
- a second light guiding portion 11 extending from the branching portion 10 toward one side in the vehicle width direction (the left in this embodiment);
- the third light guide section 12 extends toward the right side, and a part of the second light guide section 11 from the branching section 10 extends toward one side in the vehicle width direction (in the present embodiment, the left side).
- a first curved portion 13 that is curved to the right, and a second curved portion 14 that is a portion of the third light guide portion 12 from the branch portion 10 that is curved toward the other (right in this embodiment) side in the vehicle width direction. It has
- the inner lens 4 includes an entrance part 15 located on the base end (lower end in this embodiment) side of the first light guide part 9 and one surface (lower surface in this embodiment) side of the second light guide part 11.
- the first reflecting section 16 located on the other surface (the upper surface in this embodiment) of the second light guiding section 11;
- the second reflecting section 18 is located on the lower surface (in this embodiment) side, the second emitting section 19 is located on the other surface (in this embodiment, the upper surface) side of the third light guiding section 12, and the first It has a first light guide/output section 20 located at the curved section 13 and a second light guide/output section 21 located at the second curved section 14 .
- the entrance section 15 is located on the base end (lower end) side of the first light guide section 9 and has a flat (plane) entrance surface 15a facing the light source 3.
- the entrance section 15 allows the light L emitted from the light source 3 to enter the inside of the first light guide section 9 (inner lens 4) from the entrance surface 15a. Further, the light L entering from the incident part 15 is guided inside the first light guide part 9 toward the branch part 10 located at the tip (upper end) side of the first light guide part 9. .
- the entrance part 15 is not limited to the above-described configuration having the flat (plane) entrance surface 15a, and the first light guide part while collimating or condensing the light L radially emitted from the light source 3.
- the structure may have a lens shape that allows the light to enter into the interior of the light beam.
- the branching part 10 is located on the tip (upper end) side of the first light guide part 9 and connects the first curved part 13 of the second light guide part 11 and the second curve of the third light guide part 12.
- the portion 14 is a branched portion curved in opposite directions, and the light L guided toward the tip (upper end) side of the first light guide portion 9 is divided into the second light guide portion 11 side and the second light guide portion 11 side. The light is guided while branching to the light guide section 12 side of No. 3.
- the light L1 branched from the branching section 10 toward the second light guiding section 11 side passes through the first curved section 13 .
- the light is guided from the base end side to the distal end side of the second light guide section 11 through the light guide section 11 .
- the light L2 branched from the branching section 10 toward the third light guiding section 12 is The light is guided from the proximal end to the distal end.
- the second light guide section 11 and the third light guide section 12 have different lengths, and one side (in this embodiment, the left and right direction) is different in length.
- the second light guide section 11 that extends toward the left side in the first direction is longer than the third light guide section 12 that extends toward the other side (the right side in this embodiment) in the first direction. .
- the proportion of the light L1 guided towards the second light guide part 11 side and the proportion of the light L2 guided towards the third light guide part 12 side are adjusted according to the difference in length (optical path length) between the second light guide section 11 and the third light guide section 12.
- the proportion of the light L1 that is branched and guided toward the second light guide section 11 out of the light L that is guided toward the branching section 10 is branched to the third light guide section 12 side.
- the ratio of the light L2 that is guided is adjusted to be larger than the ratio of the light L2 that is guided.
- the first reflection section 16 is located on one surface (lower surface) side of the second light guide section 11, and has a plurality of reflection cuts 16a arranged in the direction in which the second light guide section 11 extends (horizontal direction). have.
- the plurality of reflection cuts 16a the light L1 incident on one surface (lower surface) of the second light guide section 11 is emitted (transmitted) from the other surface (upper surface) side of the second light guide section 11 to the outside.
- the shape, size, number, etc. of the light beams are not particularly limited as long as the light beams are reflected at an angle.
- the plurality of reflective cuts 16a grooves having a substantially triangular cross section are provided in the left-right direction, cutting out one surface (lower surface) side of the second light guide section 11 in the front-rear direction.
- the plurality of reflection cuts 16a uniformize the light L1 emitted from the first emission section 17 in the direction in which the second light guide section 11 extends (left and right direction).
- the depth of the groove forming the reflective cut 16a gradually increases from the proximal end to the distal end of the reflective cut 16a.
- the intervals between adjacent reflective cuts 16a may gradually become narrower from the base end side to the distal end side of the second light guide section 11.
- the first light emitting section 17 is located on the other surface (upper surface) side of the second light guide section 11 and is a first light emitting section that is continuous in the direction in which the second light guide section 11 extends (horizontal direction). It has a surface 17a.
- the first light emitting surface 17a is constituted by a convex surface curved in an arc shape in a cross section (vertical cross section) in a direction perpendicular to the extending direction of the second light guide section 11.
- the light L1 reflected by the plurality of reflection cuts 16a (first reflection section 16) is emitted to the outside of the second light guide section 11 from the first emission surface 17a.
- the second reflection section 18 is located on one surface (lower surface) side of the third light guide section 12 and has a plurality of reflection cuts 18a lined up in the direction in which the third light guide section 12 extends (horizontal direction). have.
- the plurality of reflection cuts 18a the light L2 incident on one surface (lower surface) side of the third light guide section 12 is emitted (transmitted) from the other surface (upper surface) side of the third light guide section 12 to the outside.
- the shape, size, number, etc. of the light beams are not particularly limited as long as the light beams are reflected at an angle.
- the plurality of reflective cuts 18a grooves having a substantially triangular cross section are provided in the left-right direction, cutting out one surface (lower surface) side of the third light guide section 12 in the front-rear direction.
- the plurality of reflection cuts 18a uniformize the light L2 emitted from the second emission section 19 in the direction in which the third light guide section 12 extends (left-right direction).
- the depth of the groove forming the reflective cut 18a gradually increases from the proximal end to the distal end of the reflective cut 18a.
- the intervals between adjacent reflective cuts 18a may gradually become narrower from the base end side to the distal end side of the third light guide section 12.
- the second light emitting section 19 is located on the other surface (upper surface) side of the third light guide section 12 and is a second light emitting section that is continuous in the direction in which the third light guide section 12 extends (horizontal direction). It has a surface 19a.
- the second exit surface 19a is formed of a convex surface curved in an arc shape in a cross section (vertical cross section) in a direction perpendicular to the extending direction of the third light guide section 12.
- the light L2 reflected by the plurality of reflection cuts 18a (second reflection section 18) is emitted from the second emission surface 19a to the outside of the third light guide section 12.
- the first light guide and output section 20 and the second light guide and output section 21 extend from the boundary 10a of the branch section 10 to the first curved section 13 and the second curved section 14. are provided on both sides of the branch central portion 22 which is curved in opposite directions to each other.
- the first light guide/output section 20 is located on the other surface (upper surface) side of the first curved section 13 and has a plurality of emission cuts 20a lined up in the direction in which the first curved section 13 extends (horizontal direction). have.
- part of the light L3 out of the light L1 incident on the other surface (upper surface) side of the first curved section 13 is directed to the outside from the other surface (upper surface) side of the first curved section 13.
- the plurality of emission cuts 20a grooves each having a substantially triangular cross section are provided in the left-right direction, cutting out the other surface (upper surface) of the first curved portion 13 in the front-rear direction.
- the plurality of output cuts 20a are arranged so that the light L3 emitted from the first light guide and output section 20 is uniformized in the first direction (horizontal direction) in which the first curved section 13 extends.
- the intervals between adjacent output cuts 20a gradually become narrower from the proximal end side to the distal end side of the first curved portion 13.
- the second light guide/output section 21 is located on the other surface (upper surface) side of the second curved section 14 and has a plurality of emission cuts 21a lined up in the direction in which the second curved section 14 extends (horizontal direction). have.
- part of the light L4 of the light L2 incident on the other surface (upper surface) of the second curved section 14 is directed to the outside from the other surface (upper surface) of the second curved section 14.
- the plurality of emission cuts 21a grooves having a substantially triangular cross section are provided in the left-right direction, cutting out the other surface (upper surface) of the second curved portion 14 in the front-rear direction.
- the plurality of output cuts 21a are arranged to uniformize the light L4 emitted from the second light guide and output section 21 in the first direction (left and right direction) in which the second curved section 14 extends.
- the intervals between adjacent output cuts 21a gradually become narrower from the proximal end side to the distal end side of the second curved portion 14.
- the branching part 10 has a first curved part 13 and a second curved part 13 in a cross section (vertical cross section) in a second direction perpendicular to the axial direction of the first light guide part 9. It is formed to draw an ellipse connecting two circles that are in contact with the curved portion 14 with two parallel tangents.
- first light guide section 9 has the same oval cross-sectional shape from the incident section 15 to the branch section 10. Further, the diameters of the two circles described above match the diameters of the second light guide section 11 and the third light guide section 12, which have circular cross-sectional shapes.
- the branching part 10 is formed such that at least a part of the boundary 10a between the first curved part 13 and the second curved part 14 draws a straight line SL in the cross section in the second direction (vertical cross section). There is. That is, the boundary 10a of the branching part 10 is formed so that the straight line SL divides the middle of two circles of the first curved part 13 and the second curved part 14 that are in contact with each other.
- the boundary 10a between the entrance part 15 and the branching part 10 into such a shape, the light L guided from the entrance part 15 toward the branching part 10 is directed to the first curved part 13 side.
- the loss of the lights L1 and L2 guided to the second light guide part 11 side and the third light guide part 12 side is suppressed, and the overall It is possible to increase the utilization efficiency of the light L.
- the boundary 10a of the branch portion 10 does not necessarily have to be shaped so that both ends of the straight line SL are connected to two tangent lines in the cross section in the second direction mentioned above; for example, both ends of the straight line SL are connected to two tangent lines.
- the first curved portion 13 and the second curved portion 14 may have a rounded shape.
- the first curved part 13 and the second curved part 14 extend from the boundary 10a to their respective tips in a cross section (vertical cross section) in a third direction orthogonal to the axial direction. It is formed so as to gradually change from a straight line SL to a circular arc CL toward the side.
- the reflecting member 5 is made of, for example, a white resin member having light diffusing properties, and has a structure in which a housing 5a and a reflector 5b are integrally formed. ing.
- the reflecting member 5 has an opening 5c on the front side of the vehicle lamp 1, and is arranged such that the housing 5a surrounds the inner lens 4 except for the upper side of the inner lens 4. Further, the reflecting member 5 is arranged such that the reflector 5b facing the other surface (upper surface) of the inner lens 4 is inclined toward the front opening 5c.
- the outer lens 6 is arranged to cover the opening 5c of the reflective member 5.
- the reflecting member 5 reflects the lights L1 to L4 emitted from the inner lens 4 to the outside (upward) by the reflector 5b, and emits the lights L1 to L4 toward the front opening 5c.
- the reflecting member 5 includes a first reflecting region E1 facing the central branching portion 22 of the inner lens 4, and first light guiding/emitting portions provided on both sides of the central branching portion 22 of the reflector 5b. 20 and a pair of second reflection areas E2 facing the second light guide/output part 21.
- the first reflective area E1 is an area where the degree of diffusion of the light L is greater than that of the second reflective area E2, for example, by applying texture processing or the like.
- the lights L1 to L4 (L) emitted from the front side of the outer lens 6 emit red light in a line shape with the front side of the outer lens 6 as the light emitting surface S of the lid lamp. It is possible to do so.
- the lights L5 and L6 leaked from the branch central part 22 to the outside of the first curved part 13 and the second curved part 14 are reflected by the first reflection of the reflector 5b. It is reflected forward by region E1.
- the branch center portion 22 is an area where point light is likely to occur due to leaked lights L5 and L6.
- the first reflective area E1 is an area where the degree of light diffusion is greater than that of the second reflective area E2, so it diffuses the lights L5 and L6 leaking from this branch central part 22 to a greater extent than the second reflective area E2. By reflecting while reflecting the light, it is possible to suppress the occurrence of point light.
- the vehicle lamp 1 of the present embodiment light is emitted from the first light guide/output section 20 and the second light guide/output section 21 to the outside of the first curved section 13 and the second curved section 14.
- the lights L3 and L4 are reflected forward by a pair of second reflection areas E2 of the reflector 5b.
- the first light guide and output section 20 and the second light guide and output section 21 are areas where dark areas that are darker than other areas are likely to occur. By emitting the lights L3 and L4 from the emitting section 21, it is possible to suppress the occurrence of dark areas.
- the vehicle lamp 1 of the present embodiment the area corresponding to the area between the first curved part 13 and the second curved part 14 branched from the branch part 10 (the first reflective area E1 and the It is possible to cause the second reflective area E2) to emit light almost uniformly.
- the boundary 10a of the branch portion 10 described above is formed to draw a straight line SL.
- the first curved portion 13 and the second curved portion 14 are formed so as to gradually change from a straight line SL to a circular arc CL from the boundary 10a toward their respective distal ends.
- the reflection angle of the lights L1 and L2 is smaller than in the arc CL, and the lights L1 and L2 are more likely to be totally reflected, thereby reducing the light L5 and L6 leaking to the outside from the branching part 10. Is possible.
- the light L emitted from the light source 3 described above is transmitted to the second light guide section 11 side and the third light guide section 12 side with the branch section 10 in between.
- the branch section 10 By appropriately allocating (distributing) the light, it is possible to cause the light emitting surface S extending linearly in the vehicle width direction to emit light with more uniform brightness (brightness).
- the light L guided from the above-mentioned incident part 15 toward the branching part 10 is efficiently directed to the first curved part 13 side and the second curved part 14 side. It is possible to branch the lights L1 and L2 (L) while suppressing the loss (leakage light) of the lights L1 and L2 guided to the second light guide section 11 side and the third light guide section 12 side. It is possible to increase the uptake efficiency.
- the vehicle lamp 1 of the present embodiment while increasing the utilization efficiency of the light L emitted from the light source 3 described above and preventing the occurrence of brightness unevenness on the light emitting surface S, It is possible to improve the appearance.
- the present invention is not necessarily limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention.
- the cross-sectional shape of the branch portion 10 is not necessarily limited to the shape shown in FIG. 9 described above, and as shown in FIG.
- it may be an ellipse shape in which two intersecting circles are connected by two parallel tangents.
- the above-described vehicle lamp 1 is applied to a lid lamp, but the vehicle lamp to which the present invention is applied is not limited to the rear vehicle lamp described above. It is also possible to apply the present invention to a front vehicle lamp.
- vehicle lamps to which the present invention is applied include, for example, tail lamps, stop lamps, back lamps, daytime running lamps (DRLs), vehicle width lights (position lamps), and direction indicators.
- DRLs daytime running lamps
- position lamps vehicle width lights
- direction indicators direction indicators.
- the present invention can be widely applied to vehicle lamps such as turn lamps.
- the light source in addition to the above-mentioned LED, a light emitting element such as a laser diode (LD) can be used. Furthermore, the color of the light emitted by the light source can be changed as appropriate, such as white light or orange light, in addition to the above-mentioned red light, depending on the use of the vehicle lamp.
- a light emitting element such as a laser diode (LD)
- the color of the light emitted by the light source can be changed as appropriate, such as white light or orange light, in addition to the above-mentioned red light, depending on the use of the vehicle lamp.
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Abstract
Description
本願は、2022年8月24日に出願された日本国特願2022-133575号に基づき優先権を主張し、その内容をここに援用する。
〔1〕 光源と、
前記光源から出射された光を導光させる導光体と、
前記導光体から出射された光を反射する反射部材とを備え、
前記導光体は、前記光源の前方に配置された第1の導光部と、
前記第1の導光部の基端側に位置して、前記光源から出射された光を前記第1の導光部の内部へと入射する入射部と、
前記第1の導光部の先端側に位置する分岐部と、
前記分岐部から第1の方向の一方側に向かって延長された第2の導光部と、
前記分岐部から第1の方向の他方側に向かって延長された第3の導光部と、
前記分岐部から前記第2の導光部の一部が前記第1の方向の一方側に向かって湾曲した第1の湾曲部と、
前記分岐部から前記第3の導光部の一部が前記第1の方向の他方側に向かって湾曲した第2の湾曲部と、
前記第1の湾曲部に位置して、前記第1の湾曲部の内部で導光される光の一部を前記第1の湾曲部の外部へと出射する第1の導光出射部と、
前記第2の湾曲部に位置して、前記第2の湾曲部の内部で導光される光の一部を前記第2の湾曲部の外部へと出射する第2の導光出射部とを有し、
前記反射部材は、前記分岐部の境界から前記第1の湾曲部と前記第2の湾曲部とが互いに逆向きに湾曲しながら分岐した分岐中央部と対向する第1の反射領域と、
前記分岐中央部を挟んだ両側に設けられた前記第1の導光出射部及び前記第2の導光出射部と対向する第2の反射領域とを有し、
前記第1の反射領域は、前記第2の反射領域よりも光の拡散度合いが大きい領域であることを特徴とする車両用灯具。
〔2〕 前記分岐部は、前記第1の導光部の軸線方向とは直交する第2の方向の断面において、前記第1の湾曲部と前記第2の湾曲部との境界の少なくとも一部が直線を描くように形成されていることを特徴とする前記〔1〕に記載の車両用灯具。
〔3〕 前記分岐部は、前記第2の方向の断面において、前記第1の湾曲部と前記第2の湾曲部との互いに接する2つの円の間を平行な2本の接線で繋いだ長円を描くように形成されていることを特徴とする前記〔2〕に記載の車両用灯具。
〔4〕 前記第1の湾曲部及び前記第2の湾曲部は、その軸線方向とは直交する第3の方向の断面において、前記境界から各々の先端側に向かって、前記直線から円弧へと徐変するように形成されていることを特徴とする前記〔2〕に記載の車両用灯具。
〔5〕 前記導光体は、前記第2の導光部の一面側に位置して、前記第2の導光部の内部で導光される光を前記第2の導光部の他面側に向けて反射する第1の反射部と、
前記第2の導光部の他面側に位置して、前記第1の反射部により反射された光を前記第2の導光部の外部へと出射する第1の出射部と、
前記第3の導光部の一面側に位置して、前記第3の導光部の内部で導光される光を前記第3の導光部の他面側に向けて反射する第2の反射部と、
前記第3の導光部の他面側に位置して、前記第2の反射部により反射された光を前記第3の導光部の外部へと出射する第2の出射部とを有することを特徴とする前記〔1〕に記載の車両用灯具。
なお、以下の説明で用いる図面においては、各構成要素を見やすくするため、構成要素によって寸法の縮尺を異ならせて示すことがあり、各構成要素の寸法比率などが実際と同じであるとは限らない。
なお、図1は、車両用灯具1の構成を示す正面図である。図2は、車両用灯具1の構成を示す下面図である。図3は、車両用灯具1が備える光源3の上面図である。図4は、図1中に示す線分IV-IVによる車両用灯具1の断面図である。図5は、車両用灯具1の構成を示す斜視図である。図6は、カプラー付ソケット7、インナーレンズ4及び反射部材5の構成を示す斜視図である。図7は、光源3、インナーレンズ4及び反射部材5の構成を示す正面図である。図8は カプラー付ソケット7及びインナーレンズ4の構成を示す斜視図である。図9は、図8中に示す切断面IXによるインナーレンズ4の断面図である。図10は、図8中に示す切断面Xによるインナーレンズ4の断面図である。図11は、図8中に示す切断面XIによるインナーレンズ4の断面図である。
例えば、上記分岐部10の断面形状については、上述した図9に示す形状に必ずしも限定されるものではなく、図12Aに示すように、互いに離間する2つの円の間を平行な2本の接線で繋いだ長円形状であってもよく、図12Bに示すように、互いに交わる2つの円の間を平行な2本の接線で繋いだ長円形状であってもよい。
Claims (5)
- 光源と、
前記光源から出射された光を導光させる導光体と、
前記導光体から出射された光を反射する反射部材とを備え、
前記導光体は、前記光源の前方に配置された第1の導光部と、
前記第1の導光部の基端側に位置して、前記光源から出射された光を前記第1の導光部の内部へと入射する入射部と、
前記第1の導光部の先端側に位置する分岐部と、
前記分岐部から第1の方向の一方側に向かって延長された第2の導光部と、
前記分岐部から第1の方向の他方側に向かって延長された第3の導光部と、
前記分岐部から前記第2の導光部の一部が前記第1の方向の一方側に向かって湾曲した第1の湾曲部と、
前記分岐部から前記第3の導光部の一部が前記第1の方向の他方側に向かって湾曲した第2の湾曲部と、
前記第1の湾曲部に位置して、前記第1の湾曲部の内部で導光される光の一部を前記第1の湾曲部の外部へと出射する第1の導光出射部と、
前記第2の湾曲部に位置して、前記第2の湾曲部の内部で導光される光の一部を前記第2の湾曲部の外部へと出射する第2の導光出射部とを有し、
前記反射部材は、前記分岐部の境界から前記第1の湾曲部と前記第2の湾曲部とが互いに逆向きに湾曲しながら分岐した分岐中央部と対向する第1の反射領域と、
前記分岐中央部を挟んだ両側に設けられた前記第1の導光出射部及び前記第2の導光出射部と対向する第2の反射領域とを有し、
前記第1の反射領域は、前記第2の反射領域よりも光の拡散度合いが大きい領域であることを特徴とする車両用灯具。 - 前記分岐部は、前記第1の導光部の軸線方向とは直交する第2の方向の断面において、前記第1の湾曲部と前記第2の湾曲部との境界の少なくとも一部が直線を描くように形成されていることを特徴とする請求項1に記載の車両用灯具。
- 前記分岐部は、前記第2の方向の断面において、前記第1の湾曲部と前記第2の湾曲部との互いに接する2つの円の間を平行な2本の接線で繋いだ長円を描くように形成されていることを特徴とする請求項2に記載の車両用灯具。
- 前記第1の湾曲部及び前記第2の湾曲部は、その軸線方向とは直交する第3の方向の断面において、前記境界から各々の先端側に向かって、前記直線から円弧へと徐変するように形成されていることを特徴とする請求項2に記載の車両用灯具。
- 前記導光体は、前記第2の導光部の一面側に位置して、前記第2の導光部の内部で導光される光を前記第2の導光部の他面側に向けて反射する第1の反射部と、
前記第2の導光部の他面側に位置して、前記第1の反射部により反射された光を前記第2の導光部の外部へと出射する第1の出射部と、
前記第3の導光部の一面側に位置して、前記第3の導光部の内部で導光される光を前記第3の導光部の他面側に向けて反射する第2の反射部と、
前記第3の導光部の他面側に位置して、前記第2の反射部により反射された光を前記第3の導光部の外部へと出射する第2の出射部とを有することを特徴とする請求項1に記載の車両用灯具。
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012028156A (ja) * | 2010-07-23 | 2012-02-09 | Stanley Electric Co Ltd | 車両用灯具ユニット |
| JP2012129146A (ja) * | 2010-12-17 | 2012-07-05 | Hayashi Engineering Inc | 照明装置 |
| US20150316708A1 (en) * | 2014-05-05 | 2015-11-05 | Continental Automotive Systems, Inc. | Light guide assembly for display illumination |
| JP2019050130A (ja) * | 2017-09-11 | 2019-03-28 | スタンレー電気株式会社 | 車両用灯具 |
| JP2020194622A (ja) * | 2019-05-24 | 2020-12-03 | スタンレー電気株式会社 | 車両用灯具 |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012028156A (ja) * | 2010-07-23 | 2012-02-09 | Stanley Electric Co Ltd | 車両用灯具ユニット |
| JP2012129146A (ja) * | 2010-12-17 | 2012-07-05 | Hayashi Engineering Inc | 照明装置 |
| US20150316708A1 (en) * | 2014-05-05 | 2015-11-05 | Continental Automotive Systems, Inc. | Light guide assembly for display illumination |
| JP2019050130A (ja) * | 2017-09-11 | 2019-03-28 | スタンレー電気株式会社 | 車両用灯具 |
| JP2020194622A (ja) * | 2019-05-24 | 2020-12-03 | スタンレー電気株式会社 | 車両用灯具 |
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