WO2021039633A1 - 車輌用灯具及び灯具ユニット - Google Patents

車輌用灯具及び灯具ユニット Download PDF

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Publication number
WO2021039633A1
WO2021039633A1 PCT/JP2020/031639 JP2020031639W WO2021039633A1 WO 2021039633 A1 WO2021039633 A1 WO 2021039633A1 JP 2020031639 W JP2020031639 W JP 2020031639W WO 2021039633 A1 WO2021039633 A1 WO 2021039633A1
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WO
WIPO (PCT)
Prior art keywords
lamp
light
cooling fan
rotary reflector
surface portion
Prior art date
Application number
PCT/JP2020/031639
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
渡邊　祐樹
洋希 室伏
Original Assignee
株式会社小糸製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to JP2021542841A priority Critical patent/JP7433326B2/ja
Publication of WO2021039633A1 publication Critical patent/WO2021039633A1/ja

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Classifications

    • 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
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • 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
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving 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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices
    • 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
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans

Definitions

  • the present invention relates to a technical field of a vehicle lamp having a rotary reflector that reflects light emitted from a light source.
  • the vehicle lamp has a rotary reflector that reflects the light emitted from the light source and a heat sink that releases heat generated when the light source is driven inside the lamp outer housing composed of the lamp housing and the cover. In some cases, the cooling air generated by the cooling fan is blown toward the lamp (see, for example, Patent Document 1).
  • the light emitted from the light source is reflected by the rotary reflector, and the light is scanned by the rotary reflector and irradiated to the outside to form a predetermined light distribution pattern.
  • the light source is driven (when lit)
  • heat is generated in the light source and the circuit board on which the light source is mounted, but the generated heat is transferred to the heat sink and released, and is also generated by the cooling fan toward the heat sink. Cooling air is blown. Therefore, the temperature rise of the light source and the circuit board is suppressed, and a stable driving state of the light source and the circuit board is ensured.
  • the cooling efficiency for the light source and the like is increased and a stable driving state of the light source and the circuit board is ensured, but the cooling air generated by the cooling fan is ensured. If is flowed toward the rotary reflector, the cooling air may affect the rotation of the rotary reflector and hinder the rotational operation of the rotary reflector.
  • the purpose of the vehicle lamp of the present invention is to ensure a stable driving state of the light source and then to secure a good rotational operation of the rotary reflector.
  • the lamp fixture for a vehicle is a lamp housing outer casing in which an internal space is formed as an arrangement space, which is composed of a lamp housing having an opening and a cover attached to the lamp housing with the opening closed.
  • a cooling fan attached to the lamp housing and a lamp unit arranged in the arrangement space are provided, and the lamp unit includes a rotary reflector that reflects light emitted from a light source and a motor that rotates the rotary reflector. It has a heat sink that emits heat generated when the light source is driven, the rotary reflector is positioned away from the projection surface in the axial direction of the cooling fan, and at least a part of the heat sink overlaps the projection surface. It exists in.
  • the axial direction of the cooling fan and the axial direction of the rotary reflector are the same.
  • the flow direction of the cooling air generated by the cooling fan and the flow direction of the wind generated by the rotation of the rotary reflector are opposite to each other. Is desirable.
  • the lamp unit is provided with a circuit board on which a light source is mounted, and the circuit board is arranged on the heat sink and protrudes from the base portion and the base portion.
  • a plurality of heat radiating fins arranged side by side are provided, and the heat radiating fins are formed as a maximum heat radiating surface having the largest area on both sides in the thickness direction, and the maximum radiating surface is parallel to the axial direction of the cooling fan. It is desirable to be done.
  • the cooling air generated by the cooling fan flows in the direction parallel to the maximum heat dissipation surface.
  • the heat sink is provided with a flow control unit that regulates the flow of the cooling air generated by the cooling fan toward the rotary reflector.
  • another lamp unit has an outer periphery composed of an incident surface on which light emitted from a light source is incident, an emitting surface on which light incident on the incident surface is emitted, and a plurality of surface portions.
  • a projection lens having a surface, a lens holder for holding the projection lens, and a protector attached to the lens holder are provided, and at least one of the plurality of surface portions is formed as a covering surface portion, and the covering surface portion is formed on the protector.
  • a light-shielding piece is provided to cover at least a part of the lens.
  • the covering surface portion of the projection lens is covered by the light-shielding piece provided on the protector.
  • the light-shielding piece does not come into contact with the covering surface.
  • the external light incident on the projection lens and reaching the covering surface is diffused by the grain or step.
  • the size of the light-shielding piece is smaller than the size of the covering surface portion.
  • the cooling air generated by the cooling fan is difficult to flow toward the rotary reflector and the cooling air is easily flowed toward the heat sink, so that the heat release efficiency from the heat sink is increased and the cooling fan increases the heat release efficiency.
  • the generated cooling air is less likely to affect the rotation of the rotary reflector, and it is possible to ensure good rotational operation of the rotary reflector while ensuring a stable drive state of the light source.
  • FIG. 2 to 10 show an embodiment of the present invention, and this figure is a cross-sectional view of a vehicle lamp. It is a top view of the lamp unit. It is one side view of the lamp unit. It is a rear view of a lamp unit. It is the other side view of the lamp unit. It is sectional drawing of the lamp unit. It is an exploded perspective view of a projection lens, a protector, and a lens holder. It is a perspective view of a projection lens, a protector, and a lens holder. It is sectional drawing which shows the positional relationship of a cooling fan and a lamp unit. It is sectional drawing which shows the state which the sunlight is incident on the projection lens.
  • the vehicle lighting device 1 is, for example, a vehicle headlight, and is attached and arranged at both left and right ends of the front end of the vehicle body, respectively.
  • the vehicle lamp 1 includes a lamp housing 2 having an opening at the front end and a cover 3 attached to the lamp housing 2 with the opening of the lamp housing 2 closed (see FIG. 1).
  • the lamp housing 2 and the cover 3 constitute a lamp outer housing 4.
  • the internal space of the lamp outer casing 4 is formed as an arrangement space 4a.
  • a cooling fan 5 is attached to the lamp housing 2.
  • the cooling fan 5 has a function of taking in external air into the arrangement space 4a and cooling each part arranged in the arrangement space 4a.
  • the lamp unit 6 is arranged in the arrangement space 4a.
  • the lamp unit 6 has a lens holder 7, a heat sink 8, a projection lens 9, a protector 10, and a reflector block 11 (see FIGS. 2 to 6).
  • the lens holder 7 has a frame-shaped lens holding portion 12 in which each portion is integrally formed of a resin material and has an axial direction in the front-rear direction, and a substantially U-shape that protrudes rearward from the lens holding portion 12 and opens forward. It has a mounting portion 13 formed in (see FIG. 7).
  • the lens holding portion 12 has an upper portion 14 and a lower portion 15 extending in the left-right direction and side portions 16 and 16 located apart from each other in the left-right direction, and the side portions 16 and 16 are gently convex outward in the left-right direction. It is formed in a substantially arc shape. Positioning pins 12a, 12a, 12a projecting forward are provided on the lens holding portion 12 so as to be separated in the circumferential direction.
  • Regulatory walls 14a, 14a protruding upward are provided on the upper portion 14 so as to be separated from each other on the left and right.
  • a mounting protrusion 14b projecting upward is provided on the upper portion 14 between the regulation walls 14a and 14a.
  • the lower portion 15 is provided with a downwardly protruding regulation wall 15a at a substantially central portion in the left-right direction.
  • Mounting protrusions 15b and 15b protruding downward are provided on the left and right sides of the regulation wall 15a on the lower portion 15.
  • Positioning protrusions 15c and 15c protruding downward are provided on the lower portion 15 on the outside of the mounting protrusions 15b and 15b in the left-right direction.
  • the mounting portion 13 protrudes rearward from a position closer to one end in the left-right direction of the lens holding portion 12, and has mounting holes 13a and 13a.
  • the mounting holes 13a and 13a are penetrated to the left and right and are positioned vertically separated from each other.
  • the heat sink 8 has an optical axis adjusting base 17 and a substrate mounting base 18, and each part is integrally formed of a metal material having high heat dissipation (see FIGS. 2 to 5).
  • the optical axis adjusting base 17 has a continuous portion 19 extending vertically, an upper connecting portion 20 projecting laterally from the upper end portion of the continuous portion 19, and a lower connecting portion 21 projecting laterally from the lower end portion of the continuous portion 19.
  • the upper connecting portion 20 and the flow regulating portion 22 projecting downward from the tip end portion of the upper connecting portion 20 are provided, and the protruding directions of the upper connecting portion 20 and the lower connecting portion 21 from the continuous portion 19 are the same.
  • An upper connecting hole 20a penetrated in the front-rear direction is formed at the end of the upper connecting portion 20 on the continuous portion 19 side.
  • An upper and lower aiming screw (not shown) is inserted and connected to the upper connecting hole 20a, and the rear end portion of the upper and lower aiming screw is rotatably supported by the lamp housing 2.
  • a lower connecting hole 21a penetrated in the front-rear direction is formed at the tip of the lower connecting portion 21.
  • the left and right aiming screws (not shown) are connected to the lower connecting hole 21a in a state of being inserted, and the rear end portion of the left and right aiming screws is rotatably supported by the lamp housing 2.
  • a pivot connecting hole 21b is formed at the end of the lower connecting portion 21 on the continuous portion 19 side.
  • a pivot shaft (not shown) is connected to the pivot connection hole 21b, and the rear end of the pivot shaft is supported by the lamp housing 2.
  • the entire lamp unit 6 including the heat sink 8 is tilted vertically with the pivot axis as a fulcrum to perform vertical aiming, and the left and right aiming screws rotate in the axial direction. Then, the entire lamp unit 6 including the heat sink 8 is tilted in the left-right direction with the pivot axis as a fulcrum, and left-right aiming is performed.
  • the board mounting base 18 has a plate-shaped base portion 23 facing in the left-right direction and heat-dissipating fins 24, 24, ... Protruding sideways from the base portion 23 and positioned side by side.
  • the rear end portion of the base portion 23 is continuous with the continuous portion 19.
  • the circuit board 25 is attached to the surface of the base portion 23 opposite to the side where the heat radiation fins 24, 24, ... Are located.
  • Light sources 26, 26, ... are mounted on the circuit board 25 side by side in the vertical direction.
  • a light emitting diode LED: Light Emitting Diode
  • the light sources 26, 26, ... are individually turned on and off.
  • the heat radiating fins 24, 24, ... are projected from the base portion 23 in the direction opposite to the protruding direction from the continuous portion 19 of the upper connecting portion 20, and the thickness directions are aligned in the vertical direction.
  • the heat radiating fins 24 are formed as maximum heat radiating surfaces 24a and 24a having the largest areas on both the upper and lower sides.
  • the heat sink 8 is attached to the attachment portion 13 of the lens holder 7. Specifically, the upper and lower ends of the front end of the base portion 23 are attached by mounting screws 100 and 100 that are inserted into the mounting holes 13a and 13a, respectively.
  • the projection lens 9 has a main body 27 that controls the light emitted from the light sources 26, 26, ..., And an overhang 28 that projects outward from a portion other than a part at the rear end of the main body 27.
  • the outer surface of the main body 27 includes an incident surface 29 on which the light emitted from the light sources 26, 26, ... Is incident, an exit surface 30 on which the incident light is emitted, and an outer peripheral surface 31 composed of a plurality of surface portions. It is composed of.
  • the incident surface 29 is formed as a surface facing substantially rearward.
  • the exit surface 30 is a surface located on the front side, and is formed in a substantially arcuate surface shape that is convex forward.
  • the outer peripheral surface 31 is composed of an upper surface portion 31a, a side surface portion 31b, and a lower surface portion 31c in that order in the circumferential direction.
  • the side surface portion 31b is formed as a surface facing inward in the left-right direction of the vehicle.
  • the upper surface portion 31a and the lower surface portion 31c are formed with, for example, grain, and the side surface portion 31b is formed with, for example, a grain and a step. However, steps may be formed on the upper surface portion 31a and the lower surface portion 31c in addition to the grain.
  • the overhanging portion 28 projects outward from the rear end portion of the outer peripheral surface 31, and is formed in a substantially U shape that opens laterally.
  • the overhanging portion 28 is formed with hole-shaped or notched-shaped positioning portions 28a, 28a, 28a separated in the circumferential direction.
  • the projection lens 9 is attached to the lens holding portion 12 and held by the lens holder 7.
  • the projection lens 9 is attached to the lens holding portion 12 in a state where the positioning pins 12a, 12a, 12a are inserted into the positioning portions 28a, 28a, 28a, respectively, and the projection lens 9 is positioned with respect to the lens holder 7. This is done by, for example, adhering or welding the rear surface of the protrusion 28 to the front surface of the lens holding portion 12.
  • the protector 10 is formed by a frame-shaped portion 32 penetrating in the front-rear direction and predetermined portions protruding rearward or forward from the frame-shaped portion 32, for example, integrally formed of a metal material (see FIG. 7).
  • the entire protector 10 is, for example, black.
  • the frame-shaped portion 32 is formed in a plate shape facing in the front-rear direction, and is formed in a size and shape corresponding to the lens holding portion 12 of the lens holder 7.
  • the frame-shaped portion 32 has an upper portion 33 and a lower portion 34 extending in the left-right direction, respectively, and side portions 35, 35 located separated from each other to the left and right, and the side portions 35, 35 are outward in the left-right direction. It is formed in a roughly arcuate shape with a gentle convexity.
  • the upper positioning pieces 36 and 36 and the upper attached piece 37 are projected rearward, respectively.
  • the upper positioning pieces 36, 36 are positioned apart from each other on the left and right, and the upper mounted piece 37 is located between the upper positioning pieces 36, 36.
  • the upper mounting piece 37 is formed with mounting holes 37a penetrating vertically.
  • the upper positioning pieces 36, 36 and the upper mounted piece 37 are elastically deformable in a direction of being vertically displaced with respect to the frame-shaped portion 32.
  • the lower positioning piece 38 and the lower attached pieces 39, 39 are projected rearward, respectively.
  • the lower positioning piece 38 projects rearward from the substantially central portion in the left-right direction of the lower portion 34, and the lower mounted pieces 39, 39 are located on the left and right sides of the lower positioning piece 38.
  • the lower mounting pieces 39, 39 are formed with mounting holes 39a, 39a that are vertically penetrated.
  • the lower positioning piece 38 and the lower mounted pieces 39, 39 are elastically deformable in a direction of being vertically displaced with respect to the frame-shaped portion 32.
  • the shading piece 40 protrudes forward from the upper edge of the lower portion 34.
  • the light-shielding piece 40 is formed in substantially the same shape as the lower surface portion 31c of the projection lens 9, has the same size as the lower surface portion 31c, or is one size smaller than the lower surface portion 31c. However, the light-shielding piece 40 may be formed in the same shape and size as the lower surface portion 31c.
  • Projecting pieces 41 and 41 and holding pieces 42 project rearward from the outer edge of one side portion 35, respectively.
  • the projecting pieces 41 and 41 are vertically separated from each other, and the pressing piece 42 is located between the projecting pieces 41 and 41.
  • the holding piece 42 is elastically deformable in a direction of being displaced to the left and right with respect to the frame-shaped portion 32.
  • the protector 10 is attached to the lens holding portion 12 in a state where the projection lens 9 is attached to the lens holding portion 12 of the lens holder 7 (see FIG. 8).
  • the mounting protrusion 14b is inserted into the mounting hole 37a of the upper mounting piece 37, and the mounting protrusions 15b and 15b are inserted into the mounting holes 39a and 39a of the lower mounted pieces 39 and 39, respectively. It is attached to the lens holding portion 12.
  • the tips of the upper positioning pieces 36 and 36 are abutted against the front surfaces of the regulation walls 14a and 14a, respectively, and the tips of the lower positioning pieces 38 are abutted against the front surface of the regulation wall 15a so that the protector 10 is front and rear with respect to the lens holder 7.
  • Positioning in the direction is performed. Further, a part of the lower mounted pieces 39, 39 is engaged with the positioning protrusions 15c and 15c, respectively, and the pressing piece 42 is pressed against the side portion 16 from the side, so that the protector 10 is laterally oriented with respect to the lens holder 7. Positioning is performed in.
  • the overhanging portion 28 of the projection lens 9 is shielded from the front side by the frame-shaped portion 32, and the lower surface portion 31c of the projection lens 9 is shielded from the lower side by the light shielding piece 40. (See FIGS. 2, 3 and 5). Therefore, the lower surface portion 31c of the projection lens 9 is a covered surface portion covered from below by the light-shielding piece 40.
  • the protector 10 has a shielding function of shielding a part of the structure arranged in the arrangement space 4a, and the appearance of the vehicle lamp 1 when the vehicle lamp 1 is visually recognized from the front by the protector 10 can be improved.
  • the light-shielding piece 40 When the protector 10 is attached to the lens holding portion 12, the light-shielding piece 40 is located below the lower surface portion 31c with a slight gap between the protector 10 and the lower surface portion 31c.
  • the reflector block 11 has a case 43, a motor 44, a rotary reflector 45, and a shade 46 (see FIGS. 2 to 6).
  • the case 43 has a substantially annular base surface portion 47 and a peripheral surface portion 48 protruding from the outer peripheral portion of the base surface portion 47, and the central hole of the base surface portion 47 is formed as a shaft insertion hole 47a.
  • the peripheral surface portion 48 is provided with coupling protrusions 48a, 48a, ... Protruding outwardly, separated from each other in the circumferential direction.
  • the case 43 is arranged so that the base surface portion 47 faces diagonally sideways.
  • a motor board 49 is attached to the back surface of the base surface portion 47.
  • the motor 44 has a motor body 44a and a motor shaft 44b, the motor body 44a is attached to the motor board 49 from the back side, and a part of the motor shaft 44b has a shaft insertion hole 47a of the motor board 49 and the base surface portion 47. It is inserted and located inside the case 43.
  • the rotary reflector 45 is fixed to the motor shaft 44b and rotated inside the case 43.
  • the rotation reflector 45 has a rotation fulcrum portion 50 that functions as a rotation fulcrum and a reflection portion 51 located on the outer peripheral side of the rotation fulcrum portion 50, and the rotation fulcrum portion 50 is fixed to the motor shaft 44b.
  • the surface of the reflection portion 51 opposite to the base surface portion 47 is formed as the reflection control surface 51a, and is slightly inclined with respect to the rotation axis direction of the rotation reflector 45.
  • the shade 46 is formed by bending a flat metal material into a predetermined shape, and is orthogonal to the shielding plate portion 52 from the outer peripheral portion of the shielding plate portion 52 and the shielding plate portion 52 that covers the portion of the rotary reflector 45 excluding a part. It has connecting pieces 53, 53, ... Protruding in the same direction. A light passing hole 52a is formed in the shielding plate portion 52.
  • the coupling piece portions 53, 53, ... Are elastically deformable with respect to the shielding plate portion 52 in the thickness direction, and the coupling piece portions 53, 53, ... Are formed with coupling holes 53a, 53a, ... Has been done.
  • the shade 46 is attached to the case 43 by inserting the coupling protrusions 48a, 48a, ... In the coupling holes 53a, 53a, ..., Respectively.
  • the light passing holes 52a are located on the sides of the light sources 26, 26, ..., And the portion excluding a part of the rotary reflector 45 is covered by the shielding plate portion 52.
  • the reflector block 11 is attached to the upper connecting portion 20 and the lower connecting portion 21 of the heat sink 8 via mounting sheet metals 54 and 54 (see FIGS. 2 to 4). Part of the mounting sheet metal 54, 54 was coupled to the case 43, and the other part was coupled to the upper connecting portion 20 and the lower connecting portion 21, respectively, and was coupled to the upper connecting portion 20 and the lower connecting portion 21. Each portion is attached by screw members 200, 200. Therefore, the reflector block 11 is attached to the upper connecting portion 20 and the lower connecting portion 21 by the screw members 200, 200 via the mounting sheets 54, 54.
  • the light emitted from the light sources 26, 26, ... Is passed through the light passing hole 52a and is rotated by the reflecting portion 51 of the rotating reflector 45. Is reflected and scanned by the reflection control surface 51a.
  • the light reflected by the reflecting unit 51 passes through the light passing hole 52a again, is incident on the projection lens 9 from the incident surface 29, is controlled by the projection lens 9 so as to be substantially parallel light, is transmitted through the cover 3, and is forward. It is irradiated toward.
  • a part of the light emitted from the light sources 26, 26, ... Is shielded by the shielding plate portion 52 of the shade 46, so that the light transmitted through the cover 3 and irradiated forward is more appropriate.
  • a light distribution pattern is formed.
  • the light sources 26, 26, ... are individually turned on and off.
  • an oncoming vehicle, a preceding vehicle, or a pedestrian is detected by a detection unit (not shown).
  • a detection unit not shown.
  • the predetermined light source 26 is turned off so that the light toward the oncoming vehicle, the preceding vehicle, or the pedestrian is not emitted.
  • An extension 55 is arranged in the arrangement space 4a of the lamp outer casing 4 (see FIGS. 9 and 10).
  • the extension 55 is arranged so as to shield a portion of the lamp unit 6 other than the exit surface 30 from the surroundings.
  • the rotary reflector 45 is positioned away from the projection surface A in the axial direction P of the cooling fan 5, and at least a part of the heat sink 8 is positioned so as to overlap the projection surface A. It is configured to exist (see FIG. 9).
  • the heat sink 8 exists at a position where at least the heat radiation fins 24, 24, ... Are overlapped with the projection surface A.
  • the axial direction P of the cooling fan 5 and the axial direction Q of the rotary reflector 45 are in the same direction or substantially the same direction.
  • the rotary reflector 45 When the light sources 26, 26, ... Are lit, the rotary reflector 45 is rotated and the light is reflected by the reflecting unit 51 toward the projection lens 9, and at the same time, the cooling fan 5 is rotated and taken in from the outside of the vehicle lamp 1. The air is sent to the lamp unit 6 as cooling air.
  • the rotary reflector 45 since the rotary reflector 45 is located away from the projection surface A in the axial direction P of the cooling fan 5, it is difficult for the cooling air to flow toward the rotary reflector 45 and to the heat sink 8. It is easy to flow toward. Further, also because the axial direction P of the cooling fan 5 and the axial direction Q of the rotary reflector 45 are in the same direction or substantially the same direction, the cooling air generated by the cooling fan 5 is flowed toward the rotary reflector 45. hard.
  • a flow control unit 22 provided as a part of the heat sink 8 is located between the cooling fan 5 and the rotary reflector 45. Therefore, since the flow regulating unit 22 regulates the flow of the cooling air generated by the cooling fan 5 toward the rotary reflector 45, the cooling air generated by the cooling fan 5 is more difficult to flow toward the rotary reflector 45. ing.
  • the flow direction of the cooling air generated by the cooling fan 5 and the flow direction of the air generated by the rotation of the rotary reflector 45 are opposite to each other, and the cooling air generated by the cooling fan 5 is rotated when the rotary reflector 45 is rotated. It is made difficult to be sucked by the rotary reflector 45.
  • the heat radiation fins 24, 24, ... Are the maximum heat radiation surfaces 24a, 24a, ... On both the upper and lower sides, which are parallel to or substantially parallel to the axial direction P of the cooling fan 5.
  • the cooling air generated by the cooling fan 5 is flowed in a direction parallel to the maximum heat dissipation surfaces 24a, 24a, ....
  • the rotary reflector 45 is positioned away from the projection surface A in the axial direction P of the cooling fan 5, and at least a part of the heat sink 8 overlaps the projection surface A.
  • the flow direction of the cooling air generated by the cooling fan 5 and the flow direction of the air generated by the rotation of the rotary reflector 45 are opposite to each other.
  • the cooling air generated by the cooling fan 5 is less likely to be sucked by the rotation reflector 45 when the rotation reflector 45 is rotated, and the cooling air is less likely to affect the rotation of the rotation reflector 45, so that the rotation reflector 45 is more stably rotated. Can be secured.
  • the heat radiation fins 24, 24, ... are formed as maximum heat radiation surfaces 24a, 24a, ... With the largest area on both sides in the thickness direction, and the maximum heat radiation surfaces 24a, 24a, ... Are cooled. It is parallel to the axial direction of the fan 5.
  • the heat sink 8 is provided with a flow regulation unit 22 that regulates the flow of the cooling air generated by the cooling fan 5 toward the rotary reflector 45.
  • a lamp unit having a projection lens for controlling light emitted from a light source and a lens holder for holding the projection lens is arranged inside a lamp outer housing composed of a lamp housing and a cover.
  • a projection lens for controlling light emitted from a light source
  • a lens holder for holding the projection lens
  • the light emitted from the light source is controlled by a projection lens so as to be parallel light, and is transmitted through the cover and irradiated forward.
  • Such a vehicle lamp is provided with a flange-shaped overhang at the rear end of the projection lens, and the overhang is attached to the lens holder to hold the projection lens in the lens holder.
  • the overhanging portion is blocked by a predetermined member (see, for example, Japanese Patent Application Laid-Open No. 2017-22032).
  • a first member and a second member are provided as a lens holder, an overhanging portion is attached to the first member, and the second member is an overhanging portion. It is configured to be attached to the first member while covering the lens. Therefore, the second member functions as a protector that covers the overhanging portion that is a part of the projection lens, and the overhanging portion is covered by the protector to ensure a good appearance when the vehicle lamp is visually recognized from the front. The visibility is improved.
  • the condensed portion is melted, especially when the amount of incident sunlight is large. Or deformation may occur.
  • the member of the condensing portion is made of a resin material, such a defect is likely to occur.
  • the lamp unit is a part that has a main configuration in vehicle lamps, and it is desirable that the lamp unit is composed of a small number of parts to reduce the manufacturing cost.
  • the sunlight S transmitted through the cover 3 may be incident from the exit surface 30 which is not shielded by the extension 55 (see FIG. 10).
  • the sunlight S may be internally reflected by the incident surface 29 and reach the lower surface portion 31c depending on the angle of incidence on the projection lens 9.
  • the lower surface portion 31c of the projection lens 9 is formed as a covering surface portion, and the protector 10 is provided with a light-shielding piece 40 that covers at least a part of the lower surface portion 31c.
  • the lower surface portion 31c of the projection lens 9 is a covered surface portion covered with the light-shielding piece 40, at least one of the surface portions other than the lower surface portion 31c of the outer peripheral surface 31 of the projection lens 9 is shown above.
  • the protector 10 may be provided with a light-shielding piece that is formed as a covered surface portion and covers at least a part of the covered surface portion.
  • the lower surface portion 31c of the projection lens 9 is formed as a covering surface portion, the surface portion easily reachable by the sunlight S is covered by the light-shielding piece 40, so that the incident direction of the sunlight S with respect to the projection lens 9 is taken into consideration. It is possible to efficiently prevent melting and deformation due to sunlight S.
  • the light-shielding piece 40 since the size of the light-shielding piece 40 is smaller than the size of the covering surface portion, the light-shielding piece 40 can be positioned so as not to protrude to the outside of the projection lens 9, and other structures of the light-shielding piece 40 can be positioned. It is possible to prevent melting due to sunlight S while avoiding contact with an object.
  • the light-shielding piece 40 may be made larger than the covering surface portion as long as contact with other structures can be avoided.
  • the lower surface portion 31c which is the covering surface portion is prevented from being damaged. can do.
  • the projection lens 9 is easily visible from diagonally above the front, and the upper surface of the light-shielding piece 40 is easily visible through the projection lens 9.
  • the lower surface portion 31c has at least a grain or a step. One is formed. Therefore, the external light incident on the projection lens 9 and reaching the lower surface portion 31c is diffused by the grain or the step, and the light-shielding piece 40 becomes difficult to see through the projection lens 9, and the visibility can be improved.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
PCT/JP2020/031639 2019-08-26 2020-08-21 車輌用灯具及び灯具ユニット WO2021039633A1 (ja)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01165501U (enrdf_load_stackoverflow) * 1988-05-13 1989-11-20
JP2011082005A (ja) * 2009-10-07 2011-04-21 Koito Mfg Co Ltd 車輌用灯具
JP2014063604A (ja) * 2012-09-20 2014-04-10 Ichikoh Ind Ltd 車両用灯具
US20140146555A1 (en) * 2012-11-28 2014-05-29 Sl Corporation Lamp assembly for vehicle
JP2014154253A (ja) * 2013-02-05 2014-08-25 Koito Mfg Co Ltd 車輌用灯具
WO2015122303A1 (ja) * 2014-02-12 2015-08-20 株式会社小糸製作所 光学ユニットおよび車両用灯具
JP2017022032A (ja) * 2015-07-13 2017-01-26 市光工業株式会社 車両用灯具
JP2019003908A (ja) * 2017-06-20 2019-01-10 株式会社小糸製作所 ランプユニット
JP2019505084A (ja) * 2016-02-02 2019-02-21 ツェットカーヴェー グループ ゲーエムベーハー 自動車用の照射ユニット

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01165501U (enrdf_load_stackoverflow) * 1988-05-13 1989-11-20
JP2011082005A (ja) * 2009-10-07 2011-04-21 Koito Mfg Co Ltd 車輌用灯具
JP2014063604A (ja) * 2012-09-20 2014-04-10 Ichikoh Ind Ltd 車両用灯具
US20140146555A1 (en) * 2012-11-28 2014-05-29 Sl Corporation Lamp assembly for vehicle
JP2014154253A (ja) * 2013-02-05 2014-08-25 Koito Mfg Co Ltd 車輌用灯具
WO2015122303A1 (ja) * 2014-02-12 2015-08-20 株式会社小糸製作所 光学ユニットおよび車両用灯具
JP2017022032A (ja) * 2015-07-13 2017-01-26 市光工業株式会社 車両用灯具
JP2019505084A (ja) * 2016-02-02 2019-02-21 ツェットカーヴェー グループ ゲーエムベーハー 自動車用の照射ユニット
JP2019003908A (ja) * 2017-06-20 2019-01-10 株式会社小糸製作所 ランプユニット

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