WO2022185949A1 - 車両用灯具 - Google Patents
車両用灯具 Download PDFInfo
- Publication number
- WO2022185949A1 WO2022185949A1 PCT/JP2022/006603 JP2022006603W WO2022185949A1 WO 2022185949 A1 WO2022185949 A1 WO 2022185949A1 JP 2022006603 W JP2022006603 W JP 2022006603W WO 2022185949 A1 WO2022185949 A1 WO 2022185949A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lamp
- reflector
- light emitting
- light
- projection lens
- Prior art date
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Images
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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/36—Combinations of two or more separate reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/19—Attachment of light sources or lamp holders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/255—Lenses with a front view of circular or truncated circular outline
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/26—Elongated lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/28—Cover glass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/29—Attachment thereof
- F21S41/295—Attachment thereof specially adapted to projection lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/39—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/49—Attachment of the cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
- B62J6/02—Headlights
- B62J6/022—Headlights specially adapted for motorcycles or the like
-
- 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
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
-
- 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
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/30—Fog lights
Definitions
- Patent Document 1 As a structure of a vehicle lamp, for example, as described in "Patent Document 1", light from a light source reflected by a reflector is projected through a projection lens toward the front of the lamp. things are known.
- the vehicle is a four-wheeled vehicle such as a two-wheeled vehicle or a one-box car
- the road surface in front of the light fixtures should be viewed from a short distance. Easy to see.
- the light emitting surface of the light emitting element is arranged so as to face diagonally upward or downward toward the front of the lamp, not only the reflected light from the reflector but also the direct light from the light emitting element can be made to enter the projection lens efficiently, thereby increasing the efficiency of the lamp.
- the substrate on which the light emitting element is mounted is also arranged in an inclined state.
- the substrate and the reflector are arranged with high positional accuracy with respect to the heat sink.
- FIG. 8 of "Patent Document 2" describes such a vehicle lamp having first and second light emitting elements as light sources and first and second reflectors as reflectors. ing.
- first and second light emitting elements are vertically spaced apart from each other on the front surface of a substrate arranged to extend along a vertical plane perpendicular to the longitudinal direction of the lamp. , the light from the first light emitting element is reflected by the first reflector, and the light from the second light emitting element is reflected by the second reflector.
- the vehicle lamp according to the present invention is A vehicular lamp comprising a light source, a reflector, and a projection lens, and configured to irradiate light from the light source reflected by the reflector toward the front of the lamp via the projection lens
- the light source comprises first and second light emitting elements mounted on a common substrate, The substrate is arranged in an inclined state so that the light emitting surfaces of the first and second light emitting elements are oriented obliquely upward or obliquely downward toward the front of the lamp,
- the second light emitting element is arranged at a position away from the first light emitting element toward the front side of the lamp
- the reflectors include a first reflector that reflects light emitted from the first light emitting element toward the projection lens, and a second reflector that reflects light emitted from the second light emitting element toward the projection lens. equipped with The second reflector is positioned between the first and second light emitting elements.
- a vehicle lamp equipped with a projection lens can illuminate a short-distance road surface in front of the lamp with substantially uniform brightness.
- the projection lens is supported by the light source support member at the rear end of the cylindrical portion, there is no need for a member for supporting the projection lens, such as the bracket unit of the prior art, thereby reducing the number of parts. reduction can be achieved.
- the substrate on which the light emitting element is mounted is arranged in an inclined state, and this substrate is supported by the heat sink while being pressed against the heat sink from the front side of the lamp by the reflector. Therefore, the light-emitting element and the reflector can be arranged with high positional accuracy with respect to the heat sink, thereby sufficiently ensuring the light distribution performance of the lamp.
- the second reflector is arranged between the first and second light emitting elements. Therefore, after minimizing the space for arranging the second reflector, the light from the second light emitting element is efficiently directed to the projection lens by the second reflector at a position near the perpendicular direction of the light emitting surface. The light can be reflected, and the efficiency of the lamp can be improved in this respect as well.
- the lamp in a vehicle lamp having a projection lens, is configured such that light from the first and second light emitting elements reflected by the first and second reflectors is incident on the projection lens. Efficiency can be increased.
- FIG. 1 is a perspective view showing a vehicle lamp according to one embodiment of the present invention.
- 2 is a view taken in the direction of arrow II in FIG. 1.
- FIG. 3 is a cross-sectional view taken along line III--III in FIG.
- FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.
- FIG. 5 is a detailed view of the essential part of FIG.
- FIG. 6 is a detailed view of the essential part of FIG.
- FIG. 7 is a detailed view of the essential part of FIG.
- FIG. 8 is an exploded perspective view showing the vehicular lamp of FIG. 1 separated into a projection lens and other lamp constituent members.
- FIG. 9 is an exploded perspective view showing the lamp component of FIG. 8 separated into a reflector, a substrate assembly and a heat sink.
- FIG. 10 is an exploded perspective view showing the lamp component of FIG. 8 separated into a reflector, a substrate assembly and a heat sink.
- 11 is a cross-sectional view taken along line XI-XI of FIG. 8.
- FIG. 12A is a view perspectively showing a light distribution pattern formed by light emitted from the vehicle lamp of FIG. 1.
- FIG. 12B is a view perspectively showing a light distribution pattern formed by light emitted from the vehicle lamp of FIG. 1.
- FIG. FIG. 13 is a view, similar to FIG. 4, showing a first modification of the above embodiment.
- FIG. 14 is a view similar to FIG. 2, showing a second modification of the above embodiment.
- FIG. 15 is a view similar to FIG. 2, showing a third modification of the above embodiment.
- FIG. 12A is a view perspectively showing a light distribution pattern formed by light emitted from the vehicle lamp of FIG. 1.
- FIG. 12B is a view perspectively showing a light distribution pattern formed by light emitted from
- FIG. 1 is a perspective view showing a vehicle lamp 10 according to one embodiment of the invention.
- 2 is a view taken along line II in FIG. 1
- FIG. 3 is a cross-sectional view taken along line III--III in FIG. 2
- FIG. 4 is a cross-sectional view taken along line IV--IV in FIG.
- the vehicle lamp 10 is a two-wheeled vehicle headlamp that is attached to the front end of a two-wheeled vehicle and is configured to selectively perform low beam irradiation and high beam irradiation.
- the vehicle lamp 10 is a projector-type lamp including a light source 20, a reflector 30, and a projection lens 40. is configured to emit light toward the front of the lamp (that is, toward the front of the vehicle).
- the light source 20 is composed of four first light emitting elements 20A that are lit during low beam irradiation and four second light emitting elements 20B that are additionally lit during high beam irradiation.
- the four first light emitting elements 20A and the four second light emitting elements 20B are mounted on a common substrate 22, thereby forming a substrate assembly 60.
- the substrate assembly 60 is supported by the heat sink 50 on the substrate 22 .
- Reflector 30 and projection lens 40 are also supported by heat sink 50 .
- the four first light emitting elements 20A are arranged side by side in the left-right direction.
- the four second light emitting elements 20B are arranged in the left-right direction at positions separated from the four first light emitting elements 20A toward the front side of the lamp (specifically, at positions separated diagonally downward in front of the lamp along the upper surface of the substrate 22). They are arranged side by side.
- the projection lens 40 has an optical axis Ax extending in the longitudinal direction of the lamp, and inversely projects a projection image formed on a virtual vertical plane including the rear focal point F to produce a light distribution pattern for low beam and a light distribution pattern for high beam.
- a light distribution pattern (these will be described later) is formed.
- the position of the rear focal point F of the projection lens 40 is the central position in the left-right direction of the four first light emitting elements 20A and a position slightly below the light emitting surface 20Aa (that is, above the light emitting surface 20Ba of the second light emitting element 20B). up position).
- FIG. 8 is an exploded perspective view showing the vehicle lamp 10 separated into the projection lens 40 and other lamp constituent members.
- 9 is an exploded perspective view showing the lamp constituent members of FIG. 8 separated into the reflector 30, the substrate assembly 60 and the heat sink 50, and
- FIG. 10 is an exploded perspective view showing the lamp constituent members of FIG. 2 is an exploded perspective view showing a state in which a substrate assembly 60 and a heat sink 50 are separated from each other.
- FIG. 8 is an exploded perspective view showing the vehicle lamp 10 separated into the projection lens 40 and other lamp constituent members.
- 9 is an exploded perspective view showing the lamp constituent members of FIG. 8 separated into the reflector 30, the substrate assembly 60 and the heat sink 50
- the lens main body 42 is configured as a plano-convex aspherical lens with a convex front surface, and has a circular outer shape when viewed from the front of the lamp.
- the tubular portion 44 has a circular outer shape whose front end portion is slightly larger than the lens body portion 42, and its front end surface 44a is formed in an annular shape.
- the tubular portion 44 is formed such that its diameter gradually increases toward the rear of the lamp, and the rear end portion thereof has a substantially octagonal outer shape.
- the tubular portion 44 is formed such that its thickness gradually increases from its upper end to its lower end.
- An outer peripheral flange portion 44A is formed on the rear end portion of the cylindrical portion 44 over the entire circumference.
- the outer peripheral flange portion 44A has a substantially octagonal outer shape.
- the outer peripheral flange portion 44A is formed with a substantially constant width, but the width is narrow in the lower region. Further, the outer peripheral flange portion 44A is formed so that the thickness gradually decreases toward the outer peripheral side.
- a rear surface of the outer peripheral flange portion 44A extends along a vertical plane orthogonal to the optical axis Ax, and an annular projection portion 44B extending toward the rear of the lamp is formed on this rear surface.
- Flat portions 44Aa are formed on the left and right sides of the outer peripheral flange portion 44A. Each flat portion 44Aa is formed by partially flattening the front surface of the outer peripheral flange portion 44A.
- the front surface of the lens body 42 of the projection lens 40 is surface-treated with a hard coat. Further, the outer peripheral surface of the cylindrical portion 44 of the projection lens 40 is subjected to light shielding treatment. This light shielding process is performed by forming a black coating film 46 over the entire circumference from the connection position with the front end surface 44a to the connection position with the outer peripheral flange portion 44A.
- the heat sink 50 is constructed as a metal member (for example, an aluminum die-cast product) provided with a plurality of radiation fins 56 extending rearward of the lamp.
- the heat sink 50 is formed with a U-shaped annular concave portion 52 at a position corresponding to the annular projection portion 44B of the projection lens 40 .
- a sealant 62 such as an adhesive
- the annular projection portion 44B of the projection lens 40 is inserted into the annular concave portion 52 from the front side of the lamp, thereby making the inside of the lamp chamber 12 airtight.
- the projection lens 40 is supported with respect to the heat sink 50 in such a manner as to maintain the .
- the annular concave portion 52 is formed so that the left and right side portions of the outer peripheral wall portion 52a thereof are thick.
- a pair of left and right screw holes 52b and 52c are formed on the front end surface of the outer peripheral wall portion 52a at positions substantially at the same height as the optical axis Ax, and a pair of left and right positioning screws are formed below the screw holes 52b and 52c. Pins 52d and 52e are formed.
- an annular protruding surface 52f is formed in the peripheral region of the pair of left and right screw holes 52b and 52c, and protruding surfaces 52g are also formed at four corner portions. It is
- the projection lens 40 is screwed and fixed to the heat sink 50 at two points on the left and right.
- a pair of left and right positioning pins 52 d and 52 e formed on the heat sink 50 are inserted into the through hole 44 Ad and the notch 44 Ae formed on the outer peripheral flange 44 A of the projection lens 40 .
- the projection lens 40 and the heat sink 50 are positioned with respect to the direction along the vertical plane orthogonal to the optical axis Ax.
- the four second light emitting elements 20B are arranged at small intervals around the vertical plane including the optical axis Ax of the projection lens 40.
- the four first light emitting elements 20A are also arranged around the vertical plane including the optical axis Ax.
- the two central light-emitting elements 20A are arranged with an interval slightly wider than the interval between the second light-emitting elements 20B.
- the two first light emitting elements 20A located at both ends are the two first light emitting elements 20A located in the central portion with respect to the first light emitting elements 20A adjacent inside. They are arranged at intervals wider than their mutual intervals.
- Each of the first and second light emitting elements 20A, 20B has the same configuration, and its light emitting surfaces 20Aa, 20Ba are formed in a horizontally long rectangular shape.
- the light-emitting surface 20Aa and the light-emitting surface 20Bb are arranged in opposite directions. That is, each first light emitting element 20A is arranged so that its light emitting surface 20Aa is located near the front edge, and each second light emitting element 20B is arranged so that its light emitting surface 20Ba is located near the rear edge. are placed.
- the substrate 22 has a configuration in which a conductive layer 24 is formed in a predetermined wiring pattern on the upper surface of a metal plate (for example, an aluminum plate) via an insulating layer (not shown).
- a conductive layer 24 is formed in a predetermined wiring pattern on the upper surface of a metal plate (for example, an aluminum plate) via an insulating layer (not shown).
- Each of the first and second light emitting elements 20A, 20B is electrically connected to a connector 26 mounted on the upper surface of the substrate 22 on the rear side of the lamp while being arranged to straddle the two conductive layers 24. there is By attaching the power connector 70 to the connector 26, power is supplied to the first and second light emitting elements 20A and 20B.
- the reflector 30 is a metal member (for example, an aluminum die-cast product) and includes first and second reflectors 30A and 30B together with a peripheral structure 34 formed to connect them. It has a configuration with
- the first reflector 30A has four reflective areas as its reflective surface 30Aa. That is, the reflective surface 30Aa has two reflective areas 30Aa1 and 30Aa2 located above the opening 32, and a pair of reflective areas 30Aa3 located on both left and right sides of the opening 32. As shown in FIG.
- the reflective area 30Aa1 is formed so as to face the opening 32 at its lower edge.
- the reflective area 30Aa2 is formed so as to surround the reflective area 30Aa1 from above, and has a substantially fan-shaped outer shape when viewed from the front of the lamp.
- a pair of left and right reflective areas 30Aa3 are formed so as to face the opening 32 at their inner edges.
- the reflective area 30Aa2 is subjected to light diffusion processing for diffusely reflecting the light emitted from the four first light emitting elements 20A. This light diffusion treatment is performed by subjecting the reflective area 30aA to texturing E. As shown in FIG.
- the second reflector 30B has three reflecting areas as its reflecting surface 30Ba. That is, the reflective surface 30Ba includes a reflective area 30Ba1 positioned below the opening 32 and a pair of reflective areas 30Ba2 positioned on both left and right sides of the reflective area 30Ba1.
- the reflective regions 30Ba1 are formed on both the left and right sides of the four second light emitting elements 20B so as to wrap around and extend to positions below the four second light emitting elements 20B.
- the pair of left and right reflective areas 30Ba2 are formed adjacent to the pair of left and right wrapping portions of the reflective areas 30Ba1.
- the second reflector 30B has an upper end surface formed as a convex curved surface slightly upward with respect to the horizontal plane. Specifically, the upper end surface of the second reflector 30B extends slightly downward in a straight line toward the front of the lamp and is formed to hang down on both left and right sides about a vertical plane including the optical axis Ax. The trailing edge defines the shape of the lower edge of the opening 32 .
- the heat sink 50 has a substrate support portion 54 for supporting the substrate 22 of the substrate assembly 60 .
- the substrate 22 is supported by the heat sink 50 while being pressed against the substrate support surface 54a from the front side of the lamp by the peripheral structural portion 34 of the reflector 30.
- the substrate support surface 54a is configured by a flat surface that slightly protrudes from its peripheral region, thereby ensuring that the substrate 22 is in surface contact with the substrate support surface 54a.
- the reflector 30 is screwed and fixed to the heat sink 50 at two locations on the peripheral structural portion 34 thereof.
- the substrate supporting portion 54 of the heat sink 50 is formed with a pair of positioning protrusions 54b and 54c on both left and right sides of the substrate supporting surface 54a.
- a pair of left and right positioning beams 54d (only the right side is shown) extending in the vertical direction are formed at positions corresponding to the pair of left and right positioning projections 54b and 54c on the rear side of the lamp of the board support portion 54. It is
- the substrate support portion 54 of the heat sink 50 is formed with positioning pins 54 e for positioning the substrate assembly 60 and the reflector 30 with respect to the heat sink 50 .
- FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.
- a vertical rib 54f is formed at the lower end of the positioning pin 54e.
- the vertical rib 54f extends toward the front of the lamp along the positioning pin 54e, and the front edge thereof is located on the rear side of the lamp with respect to the tip surface of the positioning pin 54e.
- the substrate 22 is formed with insertion holes 22c for inserting the positioning pins 54e and the vertical ribs 54f.
- the insertion hole 22c is an elongated hole extending in the longitudinal direction of the lamp along the slanted base plate 22, and the lateral width thereof is set to be slightly larger than the outer diameter of the positioning pin 54e.
- the peripheral structural portion 34 of the reflector 30 is formed with a pin insertion hole 34b as an engaging portion that engages with the positioning pin 54e.
- the pin insertion hole 34b is a circular hole slightly larger in diameter than the positioning pin 54e.
- peripheral structural portion 34 of the reflector 30 is formed with a substrate contact portion 34c that contacts the substrate 22 placed on the substrate support surface 54a from the front side of the lamp.
- the board contact portion 34c is formed so as to be positioned below the pin insertion hole 34b.
- the substrate placed on the substrate support surface 54a of the heat sink 50 is inserted into the insertion hole 22c of the substrate 22 and the pin insertion hole 34b of the reflector 30 from the rear side of the lamp. 22 from the front side of the lamp.
- the substrate assembly 60 and the reflector 30 are positioned with respect to the heat sink 50 with respect to the longitudinal direction of the lamp and the direction along the vertical plane orthogonal thereto.
- the substrate contact portion 34c of the reflector 30 abuts from the front side of the lamp, so that the substrate 22 is displaced toward the rear side of the lamp along the substrate support surface 54a while being in surface contact with the substrate support surface 54a of the heat sink 50. Then, the rear end face 22b abuts on the positioning beam portion 54d of the heat sink 50. As shown in FIG. Accordingly, the positioning accuracy of the substrate assembly 60 in the longitudinal direction of the lamp is sufficiently ensured. Further, at this time, the substrate 22 is brought into a state in which the rear end wall of the insertion hole 22c is engaged with the positioning pin 54e, whereby positioning of the lamp in the front-rear direction is performed more reliably.
- the front end face 22a of the substrate 22 is formed to be displaced stepwise toward the front side of the lamp toward the central position in the left-right direction.
- the peripheral structural portion 34 of the reflector 30 is formed with an opening 34d for projecting the center portion of the front end surface 22a of the substrate 22 in the left-right direction toward the front side of the lamp.
- a power connector 70 is connected with a cord 72 extending to a power source (not shown) on the vehicle body side.
- a bushing 74 is attached to the middle portion of the cord 72 .
- a cord insertion portion 54g is formed at the lower end portion of the substrate support portion 54 of the heat sink 50 so that the cord 72 is inserted and routed to the external space of the lamp chamber 12 .
- a through hole (not shown) is formed in the cord insertion portion 54g.
- the bushing 74 attached to the cord 72 is press-fitted into the through hole from the front side of the lamp, thereby maintaining airtightness in the lamp chamber 12 .
- the vehicle lamp 10 has a configuration in which the heat sink 50 can be attached to the vehicle body side bracket 100 via attachments 102 such as bolts.
- a cover member 104 for covering the outer peripheral flange portion 44A of the cylindrical portion 44 of the projection lens 40 from the front side of the lamp is attached to the vehicle body side bracket 100 via a mounting member 106. It has a configuration to get.
- FIG. 12A and 12B show a light distribution pattern formed on a virtual vertical screen placed 25 m in front of the lamp by the light emitted from the vehicle lamp 10 toward the front of the lamp (that is, the front of the vehicle) together with the motorcycle 2. It is a figure shown transparently.
- FIG. 12A shows the low beam light distribution pattern PL
- FIG. 12B shows the high beam light distribution pattern PH.
- the low-beam light distribution pattern PL shown in FIG. 12A is a light distribution pattern formed when the four first light emitting elements 20A are turned on. is projected through the projection lens 40 toward the front of the lamp.
- the low-beam light distribution pattern PL is formed as a composite light distribution pattern of the basic light distribution pattern PL0 and the short-distance light distribution pattern PLa.
- the basic light distribution pattern PL0 is a light distribution pattern formed by reflected light from a reflective area 30Aa1 and a pair of left and right reflective areas 30Aa3 of the reflective surface 30Aa of the first reflector 30A, and is a horizontal line passing through HV. It is formed as a horizontally elongated light distribution pattern that greatly spreads to both the left and right sides around a VV line, which is a vertical line passing through HV, on the lower side of a certain HH line.
- the reason why the basic light distribution pattern PL0 is formed as a horizontally long light distribution pattern is that the four first light emitting elements 20A are arranged at intervals and the first reflectors 30A are arranged one This is due to the provision of the pair of reflective areas 30Aa3.
- the basic light distribution pattern PL0 has an upper edge formed as a cutoff line CL extending substantially horizontally below the line HH, and a high luminous intensity area HZL centered on the line VV is a cutoff line. It is formed along CL.
- the short-distance light distribution pattern PLa is a light distribution pattern formed by reflected light from the reflective area 30Aa2 of the reflective surface 30Aa of the first reflector 30A, and is positioned in front of the basic light distribution pattern PL0. It is formed as a horizontally long light distribution pattern that illuminates a short-distance road surface within 5 m in front of the lamp. At this time, since the reflective area 30Aa2 is subjected to light diffusion processing by embossing, the short-distance light distribution pattern PLa is formed as a light distribution pattern having substantially uniform brightness.
- the short-distance light distribution pattern PLa is formed as a relatively oblong light distribution pattern mainly because the four first light emitting elements 20A are spaced apart from each other.
- the high beam light distribution pattern PH is a light distribution pattern formed when the four second light emitting elements 20B are additionally turned on while the four first light emitting elements 20A are turned on.
- An additional light distribution pattern PA is added to the low-beam light distribution pattern PL so as to straddle the cutoff line CL and extend upward.
- the additional light distribution pattern PA is formed as a relatively bright light distribution pattern with a smaller left-right diffusion angle than the basic light distribution pattern PL0 of the low-beam light distribution pattern PL. This is mainly due to the arrangement of the four second light emitting elements 20B close to each other.
- the vehicle lamp 10 has a configuration in which the light from the light source 20 reflected by the reflector 30 is emitted through the projection lens 40 toward the front of the lamp.
- the reflecting surface of the reflector 30 is provided with a reflecting area 30Aa2 for illuminating a short-distance road surface within 5 m in front of the lamp. is applied. Therefore, the light reflected from the reflection area 30Aa2 can illuminate the short-distance road surface in front of the lamp with substantially uniform brightness with little unevenness in light distribution.
- the vehicle lamp 10 having the projection lens 40 can illuminate the short-distance road surface in front of the lamp with substantially uniform brightness.
- the light diffusion processing applied to the reflection area 30Aa2 is performed by texturing E, so the reflected light from the reflection area 30Aa2 can be diffused in all directions, thereby providing a light diffusion function. can be sufficiently ensured.
- the first light emitting element 20A mounted on the substrate 22 is provided as the light source 20, and the substrate 22 is tilted so that the light emitting surface 20Aa thereof faces obliquely upward toward the front of the lamp.
- a first reflector 30A is provided so as to cover the first light emitting element 20A from above. Therefore, it is possible to easily secure the reflection area 30Aa2 for illuminating the short-distance road surface in front of the lamp.
- not only the reflected light from the first reflector 30A but also the direct light from the first light emitting element 20A can be made to enter the projection lens 40 efficiently, so that the lamp efficiency can be improved.
- the light source 20 has a first light emitting element 20A that lights when illuminating the low beam and a second light emitting element 20B that additionally lights when illuminating the high beam, and the second light emitting element 20B is the first light emitting element. It is arranged at a position away from 20A on the front side of the lamp.
- the reflectors 30 include a first reflector 30A that reflects light emitted from the first light emitting element 20A toward the projection lens 40, and a second reflector 30A that reflects light emitted from the second light emitting element 20B toward the projection lens 40.
- the second reflector 30B is arranged to be positioned between the first and second light emitting elements 20A, 20B, and the reflective area 30Aa2 is the reflective area of the first reflector 30A. It is formed on the surface 30Aa. Therefore, the following effects can be obtained.
- the short-distance road surface in front of the lamp when illuminating the low beam.
- it is effective to form a reflection area 30Aa2 for illuminating the short-distance road surface on the reflection surface 30Aa of the first reflector 30A as in the present embodiment.
- the second reflector 30B so as to be positioned between the first and second light emitting elements 20A and 20B as in the present embodiment, the first and second reflectors 30A and 30B are spaced apart. can be arranged efficiently.
- the four first light emitting elements 20A are arranged at intervals. Therefore, the basic light distribution pattern PL0 of the low-beam light distribution pattern PL can be formed as a light distribution pattern with a large left-right diffusion angle. It is possible to form a light distribution pattern having a large target, thereby sufficiently ensuring visibility in front of the vehicle when illuminating a low beam.
- the additional light distribution pattern PA that is formed when the high beam is emitted can be formed as a bright light distribution pattern.
- the light pattern PH can be made excellent in long-distance visibility.
- the vehicular lamp 10 according to the present embodiment is configured as a motorcycle headlamp, and for this reason, the short-distance road surface in front of the lamp can be easily seen even in front of the motorcycle 2. Therefore, the above configuration is adopted. is very effective.
- the short distance light distribution pattern PLa is formed as a horizontally long light distribution pattern, but the short distance light distribution pattern PLa may be formed as a light distribution pattern having a shape other than the horizontally long shape.
- the specific light irradiation range on the short distance road surface within 5 m in front of the lamp is not particularly limited.
- the short-distance light distribution pattern PLa may be formed as a light distribution pattern that irradiates only a short-distance road surface within 5 m in front of the lamp, or as a light distribution pattern that irradiates a wider area including the short-distance road surface. may be formed.
- the light diffusion treatment applied to the reflection area 30Aa2 of the first reflector 30A is performed by texturing E.
- a light diffusion treatment other than texturing E for example, frosting
- the reflected light from the reflection area 30Aa2 can be diffused in all directions, thereby sufficiently securing the light diffusion function. can do.
- the four first light emitting elements 20A and the four second light emitting elements 20B are arranged in the horizontal direction as the light source 20, but other numbers and arrangements may be adopted. is also possible.
- the vehicle lamp 10 is configured as a headlight for a two-wheeled vehicle.
- a configuration similar to that of the above embodiment substantially the same effects as those of the above embodiment can be obtained.
- fog lamps that illuminate the front of the vehicle, cornering lamps that illuminate the oblique front and sides of the vehicle, and the like may employ the same configuration as the above embodiment.
- the vehicle lamp 10 has a configuration in which the light from the light source 20 is emitted through the projection lens 40 toward the front of the lamp.
- the projection lens 40 has a tubular portion 44 extending toward the rear of the lamp, and is supported at its rear end by a heat sink 50 as a light source support member. is subjected to light shielding treatment by forming a black coating film 46 . Therefore, the following effects can be obtained.
- the projection lens 40 is supported by the heat sink 50 at the rear end of the cylindrical portion 44, there is no need for a member for supporting the projection lens 40, such as the conventional bracket unit described above.
- the score can be reduced.
- the cylindrical portion 44 of the projection lens 40 is light-shielded, the inner space of the cylindrical portion 44 (that is, the lamp chamber 12) is not visible when the vehicle lamp 10 is observed. can do. Therefore, the appearance of the lamp can be ensured without the necessity of arranging a cover member like the extension of the prior art.
- the appearance of the lamp can be ensured by the inexpensive and compact configuration.
- the internal space of the cylindrical portion 44 is visible when the vehicle lamp 10 is observed from any direction. can be prevented.
- the light source 20 includes four first light emitting elements 20A that light up when illuminating the low beam and four second light emitting elements 20B that additionally light up when illuminating the high beam, which are mounted on a common substrate 22. Since it is supported by the heat sink 50 in a state of being held together, the above effects can be obtained while minimizing the number of parts.
- annular protrusion 44B is formed at the rear end of the cylindrical portion 44, and an annular recess 52 is formed in the heat sink 50 to engage with the annular protrusion 44B.
- the projection lens 40 can be reliably supported, and airtightness in the lamp chamber 12 can be easily ensured.
- a pair of left and right positioning pins 52d and 52e are formed as projections extending forward of the lamp on the heat sink 50, and a notch 44Ab as an engaging portion that engages with these. And, since the through hole 44Ad is formed in the projection lens 40, the heat sink 50 and the projection lens 40 can be reliably positioned.
- the vehicle lamp 10 is configured as a motorcycle headlamp, it is possible to employ a lamp configuration in which the projection lens 40 is exposed to the outside space as it is without providing an outer cover or the like, as in the present embodiment. is also easily possible.
- a cover member that surrounds the projection lens 40 on the front side of the lamp unlike the extension of the conventional technology, is not arranged.
- a cover member 104 for covering the outer peripheral flange portion 44A of the cylindrical portion 44 of the projection lens 40 from the front side of the lamp can be attached.
- the configuration is such that the cover member 104 is not attached. Therefore, it is possible to reduce the number of parts.
- the light shielding process is performed by forming the black coating film 46, but instead of the black coating film 46, a coating film of a color other than black, a plating film, a metal vapor deposition film, or the like may be used. It is also possible to adopt a configuration in which a light shielding process is performed by forming a .
- the four first light emitting elements 20A and the four second light emitting elements 20B are arranged in the horizontal direction as the light source 20, but other numbers and arrangements may be adopted. is also possible.
- the light from the light source 20 reflected by the reflector 30 and the direct light from the light source 20 are assumed to enter the projection lens 40.
- the light from the light source 20 reflected by the reflector 30 and the light from the light source 20 It is also possible to adopt a configuration in which only one of the direct light beams from .theta.
- the vehicle lamp 10 is configured as a headlight for a two-wheeled vehicle.
- a configuration similar to that of the above embodiment substantially the same effects as those of the above embodiment can be obtained.
- fog lamps that illuminate the front of the vehicle, cornering lamps that illuminate the oblique front and sides of the vehicle, and the like may employ the same configuration as the above embodiment.
- the vehicle lamp 10 has a configuration in which the light from the light source 20 reflected by the reflector 30 is emitted through the projection lens 40 toward the front of the lamp.
- the reflector 30 and the projection lens 40 are supported by a common heat sink 50, and the first and second light emitting elements 20A and 20B as the light source 20 are also supported by the heat sink 50 via the substrate 22.
- the first and second light emitting elements 20A and 20B as the light source 20 are also supported by the heat sink 50 via the substrate 22.
- first and second light emitting elements 20A, 20B are arranged so that their light emitting surfaces 20Aa, 20Ba are directed obliquely upward toward the front of the lamp. Therefore, not only the reflected light from the reflector 30 but also the direct light from the first and second light emitting elements 20A and 20B can be efficiently incident on the projection lens 40, thereby increasing the lamp efficiency.
- the substrate 22 on which the first and second light emitting elements 20A and 20B are mounted is arranged in a rearwardly upwardly inclined state with respect to the horizontal plane.
- the substrate 22 is supported by the heat sink 50 while being pressed against the heat sink 50 from the front side of the lamp by the reflector 30 . Therefore, the first and second light emitting elements 20A and 20B and the reflector 30 can be arranged with high positional accuracy with respect to the heat sink 50, thereby sufficiently ensuring the light distribution performance of the lamp.
- the lamp efficiency can be enhanced and the lamp light distribution performance can be sufficiently ensured.
- the heat sink 50 is formed with a positioning pin 54e extending toward the front of the lamp, while the substrate 22 is formed with an insertion hole 22c through which the positioning pin 54e is inserted, and the reflector 30 is formed with a positioning pin 54e.
- a pin insertion hole 34b is formed as an engaging portion that engages with the pin 54e. Therefore, it is possible to improve the positioning accuracy of the first and second light emitting elements 20A and 20B and the reflector 30 with respect to the heat sink 50, thereby improving the light distribution performance of the lamp.
- the insertion hole 22c formed in the substrate 22 is configured as an elongated hole extending in the front-rear direction of the lamp. Therefore, the positioning pin 54e can be easily inserted into the insertion hole 22c, and the positioning accuracy of the substrate 22 and the reflector 30 with respect to the heat sink 50 can be improved in the left-right direction. As for , positioning accuracy can be ensured by pressing the substrate 22 against the heat sink 50 by the reflector 30 .
- the rear end surface 22b of the substrate 22 contacts the positioning beam 54d of the heat sink 50 while the rear end wall of the insertion hole 22c is engaged with the positioning pin 54e. It has Therefore, it is possible to improve the positioning accuracy of the substrate assembly 60 in the longitudinal direction of the lamp.
- the substrate contact portion 34c of the reflector 30 and the substrate support surface 54a of the heat sink 50, along with the positioning pins 34e and the positioning beams 54d of the heat sink 50, are used to position the substrate 22 in the longitudinal direction of the lamp. It constitutes a positioning part.
- the substrate supporting portion 54 of the heat sink 50 is formed of a flat surface in which the substrate supporting surface 54a slightly protrudes from the peripheral region. Therefore, the substrate 22 can be reliably brought into surface contact with the substrate support surface 54a, and the rear end surface 22b of the substrate 22 can be reliably brought into contact with the positioning beam portion 54d. Accordingly, the positioning accuracy of the first and second light emitting elements 20A, 20B and the reflector 30 with respect to the heat sink 50 can be further improved.
- the pair of left and right positioning projections 54b and 54c and the pair of left and right positioning beams 54d formed on the substrate support portion 54 of the heat sink 50 allow the substrate 22 to rest on the substrate support surface 54a. When placed, it performs a guide function by engaging the front end face 22a and the rear end face 22b of the base plate 22. As shown in FIG. Therefore, the operation of placing the substrate 22 on the substrate support surface 54a and bringing the rear end surface 22b into contact with the positioning beam portion 54d can be easily performed.
- the four first light emitting elements 20A and the four second light emitting elements 20B are arranged in the horizontal direction as the light source 20, but other numbers and arrangements may be adopted. is also possible.
- the vehicle lamp 10 is configured as a headlight for a two-wheeled vehicle.
- a configuration similar to that of the above embodiment substantially the same effects as those of the above embodiment can be obtained.
- fog lamps that illuminate the front of the vehicle, cornering lamps that illuminate the oblique front and sides of the vehicle, and the like may employ the same configuration as the above embodiment.
- the vehicle lamp 10 directs the light from the first and second light emitting elements 20A and 20B reflected by the first and second reflectors 30A and 30B through the projection lens 40 to the front of the lamp. It is equipped with a configuration that irradiates Specifically, the common substrate 22 on which the first and second light emitting elements 20A and 20B are mounted is such that the light emitting surfaces 20Aa and 20Ba of the first and second light emitting elements 20A and 20B are directed obliquely upward toward the front of the lamp.
- the second reflector 30B is arranged in an inclined state (that is, inclined rearward and upward with respect to the horizontal plane), and the second reflector 30B includes the first light emitting element 20A and the first light emitting element 20A toward the front side of the lamp. It is arranged so as to be positioned between the second light emitting element 20B arranged at a distant position. Therefore, the following effects can be obtained.
- the light emitting surfaces 20Aa and 20Ba of the first and second light emitting elements 20A and 20B are directed obliquely upward toward the front of the lamp. Therefore, the reflected light from the first and second reflectors 30A and 30B and the direct light from the first and second light emitting elements 20A and 20B can be incident on the projection lens 40 in good balance, thereby improving the lamp efficiency. can be enhanced.
- the second reflector 30B is arranged between the first and second light emitting elements 20A and 20B. Therefore, after minimizing the space for arranging the second reflector 30B, the light from the second light emitting element 20B is projected onto the projection lens 40 by the second reflector 30B at a position near the perpendicular direction of the light emitting surface 20Ba. The light can be efficiently reflected toward the light source, and in this respect also, the efficiency of the lamp can be improved.
- the light from the first and second light emitting elements 20A and 20B reflected by the first and second reflectors 30A and 30B is projected onto the projection lens. 40 can be made incident, the efficiency of the lamp can be improved.
- the number of parts of the lamp can be reduced.
- the reflecting surface 30Aa of the first reflector 30A is formed with a size larger than that of the reflecting surface 30Ba of the second reflector 30B. Therefore, the first and second reflectors 30A, 30B can be efficiently arranged in a limited space.
- the first reflector 30A is arranged to cover the first light emitting element 20A from above. Therefore, light from the first and second light emitting elements 20A and 20B reflected by the first and second reflectors 30A and 30B can form a horizontally elongated light distribution pattern in two upper and lower stages.
- the vehicle lamp 10 according to the present embodiment has a configuration capable of selectively performing low beam irradiation and high beam irradiation. It has a configuration that lights up additionally at times. Therefore, the following effects can be obtained.
- the direct light from the first light emitting element 20A and the reflected light from the first reflector 30A are projected through the projection lens 40 toward the front of the lamp, so that the low beam light distribution pattern PL can be easily formed.
- direct light from the second light emitting element 20B and reflected light from the second reflector 30B are emitted through the projection lens 40 toward the front of the lamp, thereby forming the low beam light distribution pattern PH.
- the additional light distribution pattern PA added to the light distribution pattern PL can be easily formed.
- the light from the first light emitting element 20A reflected by the first reflector 30A forms a short distance light distribution pattern PLa as part of the low beam light distribution pattern PL. Therefore, it is possible to easily irradiate the road surface in front of the lamp to a short distance area.
- the four first light emitting elements 20A and the four second light emitting elements 20B are arranged in the horizontal direction as the light source 20, but other numbers and arrangements may be adopted. is also possible.
- the vehicle lamp 10 is configured as a headlight for a two-wheeled vehicle.
- a configuration similar to that of the above embodiment substantially the same effects as those of the above embodiment can be obtained.
- fog lamps that illuminate the front of the vehicle, cornering lamps that illuminate the oblique front and sides of the vehicle, and the like may employ the same configuration as the above embodiment.
- FIG. 13 is a view similar to FIG. 4 showing a vehicle lamp 110 according to this modified example.
- the basic configuration of this modified example is the same as that of the above embodiment, but the configuration of the projection lens 140 is partially different from that of the above embodiment.
- the projection lens 140 includes a lens body portion 142 and a cylindrical portion 144, and the black coating film 46 is formed on the outer peripheral surface of the lens body portion 142 in the same manner as in the above embodiment.
- the lens main body 142 of the projection lens 140 is configured as a plano-convex aspherical lens having a convex front surface, but a plurality of diffusing lens elements 142s are formed on the rear surface. It is different from the case of the above-described embodiment in that the
- Each of the plurality of diffusion lens elements 142s is configured as a convex cylindrical lens extending in the vertical direction, thereby causing the reflected light from the reflector 30 to enter the lens main body 142 as light that is somewhat diffused in the horizontal direction.
- the basic light distribution pattern PL0 and the short-distance light distribution pattern PLa formed during low beam irradiation and the additional light distribution pattern PA additionally formed during high beam irradiation have a slightly larger left-right diffusion angle than in the above embodiment. It can be formed as a light distribution pattern, and can be formed as a light distribution pattern with even less light distribution unevenness than in the case of the above embodiment.
- the plurality of diffuser lens elements 142s are all configured as convex cylindrical lenses extending in the vertical direction.
- the diffusing lens element 142s may be configured as a concave cylindrical lens or a corrugated cylindrical lens with alternating concave and convex portions.
- a plurality of diffusing lens elements 142 s may be formed in a partial region of the rear surface of the lens main body 142 .
- FIG. 14 is a view similar to FIG. 2, showing a vehicle lamp 210 according to this modified example.
- the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the reflector 230 is partially different from that of the above embodiment.
- the reflector 230 is provided with a first reflector 230A and a second reflector 230B, and the first reflector 230A is formed with a reflection area 230Aa2 for illuminating a short-distance road surface in front of the lamp. ing.
- the light diffusion processing applied to the reflection area 230Aa2 is performed by forming a plurality of diffuse reflection elements 230Aa2s.
- Each of the plurality of diffuse reflection elements 230Aa2s is configured as a narrow convex cylindrical reflection element extending in the vertical direction when viewed from the front of the lamp. reflected as light.
- the short-range light distribution pattern PLa (see FIG. 12) formed on the short-range road surface in front of the lamp has Light distribution unevenness is likely to occur with respect to.
- this it is possible to effectively suppress the occurrence of such uneven light distribution.
- the plurality of diffuse reflection elements 230Aa2s are all configured as convex cylindrical reflection elements extending in the vertical direction. It can also be configured as a cylindrical reflecting element.
- FIG. 15 is a view similar to FIG. 2, showing a vehicle lamp 310 according to this modified example.
- the basic configuration of this modified example is the same as that of the above embodiment, but the configuration of the projection lens 340 is partially different from that of the above embodiment.
- the projection lens 340 has a lens main body portion 342 and a cylindrical portion 344.
- the outer peripheral surface of the cylindrical portion 344 has an outer peripheral flange portion 344A from the connection position with the front end surface 344a.
- a black coating film 346 similar to that of the above-described embodiment is formed in the range up to the connection position of .
- the formation range of the black coating film 346 is not the entire circumference of the outer peripheral surface of the cylindrical portion 344, but the upper region thereof (specifically, the region located above the horizontal plane including the optical axis Ax). ) is limited to
- the black coating film 346 only on the upper region of the outer peripheral surface of the cylindrical portion 344, the light shielding process can be performed more easily.
- FIG. 16 is a view similar to FIG. 3 showing a vehicle lamp 410 according to this modified example.
- the basic configuration of this modified example is similar to that of the above embodiment, but the configuration of the projection lens 440 is partially different from that of the above embodiment.
- the projection lens 440 of this modified example also includes a lens body portion 442 and a cylindrical portion 444, but differs from the above embodiment in that it is configured as a two-color molded product.
- substantially the entire region of the lens body portion 442 is configured as a primary molded product 440P made of transparent resin (for example, made of colorless and transparent PC resin, etc.).
- the entire region (that is, the region including the outer peripheral flange portion 444A and the annular projection portion 444B) is composed of a secondary molded product 440S made of opaque resin (for example, black PC resin, ABS resin, etc.).
- the outer peripheral edge of the lens main body 442 and the front end of the tubular portion 444 are formed as overlapping portions of the primary molded product 440P and the secondary molded product 440S.
- substantially the entire area of the cylindrical portion 444 is formed of the secondary molded product 440S made of opaque resin, so that the black paint film 46 or the like on the outer peripheral surface of the cylindrical portion 444 blocks light as in the case of the above embodiment. Not processed.
- the projection lens 440 of this modified example has a configuration in which the tubular portion 444 is light-shielded by forming an opaque two-color molded product in substantially the entire area of the tubular portion 444 . Therefore, it is possible to obtain the same effects as in the case of the above-described embodiment without requiring the outer peripheral surface of the cylindrical portion 444 to be light-shielded by the black coating film 46 or the like as in the above-described embodiment.
- FIG. 17 is a view, similar to FIG. 11, showing a main part of a vehicle lamp 510 according to this modified example.
- the basic configuration of this modification is the same as that of the above embodiment, but the support structure of the substrate assembly 60 and the reflector 130 by the heat sink 150 is partially different from that of the above embodiment.
- the substrate 22 is pressed against the substrate support surface 154a of the substrate support portion 154 of the heat sink 150 from the front side of the lamp by the substrate contact portion 134c formed in the peripheral structure portion 134 of the reflector 130. 150 supported.
- a positioning pin 134e extending toward the rear of the lamp is formed in the peripheral structural portion 134 of the reflector 130, and a positioning hole 154h as an engaging portion is formed in the board support portion 154 of the heat sink 150.
- the substrate assembly 60 and the reflector 130 are positioned with respect to the heat sink 150 by inserting the positioning pin 134e into the positioning hole 154h through the insertion hole 22c of the substrate 22 from the front side of the lamp.
- the substrate support portion 154 of the heat sink 150 is formed with the positioning projection portion 154c and the positioning beam portion 154d.
- the positioning protrusions 154c engage with the front end surface 22a of the substrate 22 and the positioning beams 154d engage with the rear end surface 22b of the substrate 22. serves as a guide.
- the positioning pin 134e when the positioning pin 134e is inserted into the positioning hole 154h through the insertion hole 22c, the rear end surface 22b of the substrate 22 is moved to the positioning beam portion 154d while the positioning pin 134e is engaged with the rear end wall of the insertion hole 22c. abut on. As a result, the substrate assembly 60 and the reflector 130 are reliably positioned with respect to the heat sink 150 in the longitudinal direction of the lamp.
- the substrate contact portion 134c of the reflector 130, the substrate support surface 154a of the heat sink 150, the positioning pin 134e and the positioning beam portion 154d of the heat sink 150 are used for positioning the substrate 22 in the longitudinal direction of the lamp. make up the department.
- the positioning accuracy of the substrate assembly 60 and the reflector 130 with respect to the heat sink 150 can be increased, thereby improving the lighting device light distribution performance of the vehicle lighting device 110.
- FIG. 18 is a view, similar to FIG. 11, showing a main part of a vehicle lamp 610 according to this modified example.
- the basic configuration of this modification is the same as that of the above embodiment, but the support structure of the substrate assembly 60 and the reflector 230 by the heat sink 250 is upside down with respect to the above embodiment. It has a configuration that
- the first and second light emitting elements 20A and 20B are arranged with their light emitting surfaces 20Aa and 20Ba (not shown) facing diagonally downward toward the front of the lamp.
- the board 22 on which these are mounted is arranged in a state of being inclined forward upward with respect to the horizontal plane.
- the substrate 22 is pressed against the substrate support surface 254a of the substrate support portion 254 of the heat sink 250 from the front side of the lamp by the substrate contact portion 234c formed in the peripheral structural portion 234 of the reflector 230. 250 supported.
- the substrate support portion 254 of the heat sink 250 is formed with a positioning pin 254e extending toward the front of the lamp, while the peripheral structure portion 234 of the reflector 230 is provided with a positioning pin inserted through the insertion hole 22c of the substrate 22.
- a pin insertion hole 234b is formed as an engaging portion that engages with 254e.
- the heat sink 150 is formed with a positioning protrusion 254c and a positioning beam 254d.
- the positioning projections 254c engage with the front end surface 22a of the substrate 22 and the positioning beams 254d engage with the rear end surface 22b of the substrate 22. serves as a guide.
- the positioning pin 254e when the positioning pin 254e is inserted into the pin insertion hole 234b through the insertion hole 22c, the rear end surface 22b of the substrate 22 becomes the positioning beam portion while the positioning pin 254e is engaged with the rear end wall of the insertion hole 22c. 254d.
- the substrate assembly 60 and the reflector 230 are reliably positioned with respect to the heat sink 250 in the longitudinal direction of the lamp.
- the positioning accuracy of the substrate assembly 60 and the reflector 230 with respect to the heat sink 250 can be increased, thereby improving the lighting device light distribution performance of the vehicle lighting device 210.
- FIG. 19 is a view similar to FIG. 6 showing a vehicle lamp 710 according to this modified example.
- the basic configuration of this modification is the same as that of the above-described embodiment, but the arrangement of the substrate assembly 60 and the reflector 730 is different from that of the above-described embodiment. and the configuration of the heat sink 750 is partially different from that of the above embodiment.
- the support structure of the substrate assembly 60 and the reflector 730 by the heat sink 750 is inverted in comparison with the above-described embodiment, and the arrangement of the substrate assembly 60 and the reflector 730 and the arrangement of the reflector 730 is partially different from that of the above embodiment.
- the first and second light-emitting elements 20A and 20B are arranged with their light-emitting surfaces 20Aa and 20Ba directed obliquely downward toward the front of the lamp.
- the substrate 22 on which the first and second light emitting elements 20A and 20B are mounted is arranged in a state of being tilted forward and upward with respect to the horizontal plane.
- the first and second light emitting elements 20A and 20B are arranged above the optical axis Ax of the projection lens 40, and the rear focal point F of the projection lens 40 is It is set at substantially the same position as the light emitting surface 20Ba of the second light emitting element 20B.
- the reflector 730 includes a first reflector 730A that reflects the light emitted from the first light emitting element 20A toward the projection lens 40, and a light emitted from the second light emitting element 20B to the projection lens 40.
- a second reflector 730B for directing reflection is integrally formed.
- the second reflector 730B is arranged between the first and second light emitting elements 20A and 20B, and the first reflector 730A is arranged below the first light emitting element 20A.
- its reflecting surface 730Aa is formed in a larger size than the reflecting surface 730Ba of the second reflector 730B.
- the heat sink 750 also has a substrate supporting portion 754 for supporting the substrate 22 of the substrate assembly 60, and the substrate supporting surface 754a thereof extends in a direction inclined forward and upward with respect to the horizontal plane. composed of planes.
- the vehicle lamp 710 forms an additional light distribution pattern similar to the additional light distribution pattern PA of the above-described embodiment during high beam irradiation by lighting the first light emitting element 20A, while forming the additional light distribution pattern similar to the additional light distribution pattern PA of the above embodiment. is turned on, downward light is emitted from the projection lens 40 toward the front of the lamp to form a light distribution pattern for the fog lamp.
- the vehicle lamp 710 having the projection lens 40 reflects the light from the first and second light emitting elements 20A and 20B reflected by the first and second reflectors 730A and 730B. It is possible to increase the efficiency of the lamp when the projection lens 40 is configured to allow light to enter.
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Abstract
Description
光源とリフレクタと投影レンズとを備え、前記リフレクタで反射した前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記リフレクタの反射面は、灯具前方5m以内の近距離路面を照射するための反射領域を備えており、
前記反射領域に、前記光源からの出射光を拡散反射させるための光拡散処理が施されている。
光源と投影レンズとを備え、前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記光源を支持する光源支持部材を備えており、
前記投影レンズは、灯具後方へ向けて延びる筒状部を備えており、
前記投影レンズは、前記筒状部の後端部において前記光源支持部材に支持されており、
前記筒状部における少なくとも上部領域に遮光処理が施されている。
光源とリフレクタと投影レンズとを備え、前記リフレクタで反射した前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記リフレクタおよび前記投影レンズは、共通のヒートシンクに支持されており、
前記光源は、基板に搭載された発光素子で構成されており、
前記基板は、前記発光素子の発光面が灯具前方へ向けて斜め上向きまたは斜め下向きとなるように傾斜した状態で配置されており、
前記基板は、前記リフレクタによって灯具前方側から前記ヒートシンクに押し付けられた状態で前記ヒートシンクに支持されている。
光源とリフレクタと投影レンズとを備え、前記リフレクタで反射した前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記光源として、共通の基板に搭載された第1および第2発光素子を備えており、
前記基板は、前記第1および第2発光素子の発光面が灯具前方へ向けて斜め上向きまたは斜め下向きとなるように傾斜した状態で配置されており、
前記第2発光素子は、前記第1発光素子から灯具前方側に離れた位置に配置されており、
前記リフレクタとして、前記第1発光素子からの出射光を前記投影レンズへ向けて反射させる第1リフレクタと、前記第2発光素子からの出射光を前記投影レンズへ向けて反射させる第2リフレクタとを備えており、
前記第2リフレクタは、前記第1および第2発光素子の間に位置するように配置されている。
Claims (22)
- 光源とリフレクタと投影レンズとを備え、前記リフレクタで反射した前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記リフレクタの反射面は、灯具前方5m以内の近距離路面を照射するための反射領域を備えており、
前記反射領域に、前記光源からの出射光を拡散反射させるための光拡散処理が施されている、車両用灯具。 - 前記光源は、基板に搭載された発光素子で構成されており、
前記基板は、前記発光素子の発光面が灯具前方へ向けて斜め上向きとなるように傾斜した状態で配置されており、
前記リフレクタは、前記発光素子を上方側から覆うように配置されている、請求項1に記載の車両用灯具。 - 前記発光素子は、ロービーム照射時に点灯する第1発光素子と、ハイビーム照射時に追加点灯する第2発光素子とを有し、
前記第2発光素子は、前記第1発光素子から灯具前方側に離れた位置に配置されており、
前記リフレクタは、前記第1発光素子からの出射光を前記投影レンズへ向けて反射させる第1リフレクタと、前記第2発光素子からの出射光を前記投影レンズへ向けて反射させる第2リフレクタとを有し、
前記第2リフレクタは、前記第1および第2発光素子の間に位置するように配置されており、
前記反射領域は、前記第1リフレクタの反射面に形成されている、請求項2に記載の車両用灯具。 - 前記第1および第2リフレクタは一体的に形成されている、請求項3に記載の車両用灯具。
- 前記第1および第2発光素子は共通の基板に搭載されている、請求項3または4に記載の車両用灯具。
- 前記車両用灯具は二輪車用前照灯として構成されている、請求項1~5のいずれか一項に記載の車両用灯具。
- 光源と投影レンズとを備え、前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記光源を支持する光源支持部材を備えており、
前記投影レンズは、灯具後方へ向けて延びる筒状部を備えており、
前記投影レンズは、前記筒状部の後端部において前記光源支持部材に支持されており、
前記筒状部における少なくとも上部領域に遮光処理が施されている、車両用灯具。 - 前記遮光処理は、前記筒状部の外周面に施されている、請求項7に記載の車両用灯具。
- 前記光源支持部材はヒートシンクで構成されており、
前記光源は、基板に搭載された発光素子で構成されており、
前記基板は前記ヒートシンクに支持されている、請求項7または8に記載の車両用灯具。 - 前記筒状部の後端部に環状突起部が形成されており、
前記ヒートシンクに、前記環状突起部と係合する環状凹部が形成されている、請求項9に記載の車両用灯具。 - 前記ヒートシンクに、灯具前方へ向けて延びる突起部が形成されており、
前記投影レンズに、前記突起部と係合する係合部が形成されている、請求項9または10に記載の車両用灯具。 - 前記車両用灯具は二輪車用前照灯として構成されている、請求項7~11のいずれか一項に記載の車両用灯具。
- 光源とリフレクタと投影レンズとを備え、前記リフレクタで反射した前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記リフレクタおよび前記投影レンズは、共通のヒートシンクに支持されており、
前記光源は、基板に搭載された発光素子で構成されており、
前記基板は、前記発光素子の発光面が灯具前方へ向けて斜め上向きまたは斜め下向きとなるように傾斜した状態で配置されており、
前記基板は、前記リフレクタによって灯具前方側から前記ヒートシンクに押し付けられた状態で前記ヒートシンクに支持されている、車両用灯具。 - 前記ヒートシンクに、灯具前方へ向けて延びる位置決めピンが形成されており、
前記基板に、前記位置決めピンを挿通させる挿通孔が形成されており、
前記リフレクタに、前記位置決めピンと係合する係合部が形成されている、請求項13に記載の車両用灯具。 - 前記リフレクタに、灯具後方へ向けて延びる位置決めピンが形成されており、
前記基板に、前記位置決めピンを挿通させる挿通孔が形成されており、
前記ヒートシンクに、前記位置決めピンと係合する係合部が形成されている、請求項13に記載の車両用灯具。 - 前記挿通孔は、灯具前後方向に延びる長孔で構成されている、請求項14または15に記載の車両用灯具。
- 前記リフレクタおよび前記ヒートシンクに、前記基板を灯具前後方向に関して位置決めするための位置決め部が形成されている、請求項16に記載の車両用灯具。
- 光源とリフレクタと投影レンズとを備え、前記リフレクタで反射した前記光源からの光を前記投影レンズを介して灯具前方へ向けて照射するように構成された車両用灯具であって、
前記光源として、共通の基板に搭載された第1および第2発光素子を備えており、
前記基板は、前記第1および第2発光素子の発光面が灯具前方へ向けて斜め上向きまたは斜め下向きとなるように傾斜した状態で配置されており、
前記第2発光素子は、前記第1発光素子から灯具前方側に離れた位置に配置されており、
前記リフレクタとして、前記第1発光素子からの出射光を前記投影レンズへ向けて反射させる第1リフレクタと、前記第2発光素子からの出射光を前記投影レンズへ向けて反射させる第2リフレクタとを備えており、
前記第2リフレクタは、前記第1および第2発光素子の間に位置するように配置されている、車両用灯具。 - 前記第1および第2リフレクタは一体的に形成されている、請求項18に記載の車両用灯具。
- 前記第1リフレクタの反射面は、前記第2リフレクタの反射面よりも大きいサイズで形成されている、請求項18または19に記載の車両用灯具。
- 前記基板は、前記第1および第2発光素子の発光面が灯具前方へ向けて斜め上向きとなるように傾斜した状態で配置されており、
前記第1リフレクタは、前記第1発光素子を上方側から覆うように配置されている、請求項18~20のいずれか一項に記載の車両用灯具。 - 前記車両用灯具は、ロービーム照射とハイビーム照射とを選択的に行い得るように構成されており、
前記第1発光素子は、ロービーム照射時に点灯するように構成されており、
前記第2発光素子は、ハイビーム照射時に追加点灯するように構成されている、請求項21に記載の車両用灯具。
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