WO2020121669A1 - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
WO2020121669A1
WO2020121669A1 PCT/JP2019/042397 JP2019042397W WO2020121669A1 WO 2020121669 A1 WO2020121669 A1 WO 2020121669A1 JP 2019042397 W JP2019042397 W JP 2019042397W WO 2020121669 A1 WO2020121669 A1 WO 2020121669A1
Authority
WO
WIPO (PCT)
Prior art keywords
light source
duct portion
control member
optical control
laser light
Prior art date
Application number
PCT/JP2019/042397
Other languages
French (fr)
Japanese (ja)
Inventor
和則 岩▲崎▼
秀丸 小谷野
駿太 高木
Original Assignee
市光工業株式会社
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 市光工業株式会社 filed Critical 市光工業株式会社
Publication of WO2020121669A1 publication Critical patent/WO2020121669A1/en

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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
    • F21S41/16—Laser light sources
    • 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
    • F21S41/24—Light guides
    • 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
    • F21S45/30—Ventilation or drainage of lighting devices
    • F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
    • 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
    • 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
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/504—Cooling arrangements characterised by the adaptation for cooling of specific components of refractors
    • 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
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes

Definitions

  • the present disclosure relates to a vehicle lighting device.
  • Patent Document 1 discloses a vehicular lamp in which a low beam light distribution pattern is formed by a plurality of light source units having different light distribution characteristics, which uses a compound optical lens in which a shade and a reflecting mirror are integrally formed on the lens itself. ing.
  • Patent Document 2 discloses a vehicle lighting device in which a fan that blows air is provided on the back surface of a heat sink that is thermally connected to a light source.
  • the distance (gap) between the optical component and the laser light source tends to be shorter than when an LED (Light Emitting Diode) is used as the light source. It becomes difficult to reduce the influence (eg, melting loss) on the parts.
  • LED Light Emitting Diode
  • the aim is to effectively reduce the influence of the laser light source on the optical components.
  • a laser light source An optical component having an incident surface of light from the laser light source, A blower, One end communicates with the blower, and the other end has a first duct portion that opens toward the laser light source, A vehicular lamp is provided in which the first duct portion has a tapered shape that narrows from the one end side toward the other end side.
  • FIG. 5 is a vertical cross-sectional view of the lamp unit of the present embodiment taken along the line AA of FIG. 4.
  • FIG. 5 is a vertical cross-sectional view of the lamp unit of the present embodiment taken along the line BB of FIG. 4.
  • front and rear indicate “forward direction” and “reverse direction” of the vehicle 102, and “up”, “down”, and “reverse direction”, respectively.
  • Left and right respectively indicate directions viewed from the driver who gets on the vehicle 102.
  • FIG. 1 is a plan view of a vehicle 102 including the vehicle lighting device of this embodiment.
  • the vehicular lamp of the present embodiment is a vehicular headlamp (101L, 101R) provided on each of the front side and the left side of the vehicle 102, and is hereinafter simply referred to as a vehicular lamp. To do.
  • the vehicle lamp of the present embodiment includes a housing (not shown) that is open to the front side of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed of the housing and the outer lens.
  • the lamp unit 1 (see FIG. 2) and the like are arranged in the lamp chamber.
  • FIG. 2 is a perspective view of the lamp unit 1 of this embodiment.
  • FIG. 3 is an exploded perspective view of the lamp unit 1 of this embodiment.
  • FIG. 4 is a front view of the lamp unit 1 of the present embodiment with the front cover 60 removed.
  • FIG. 5 is a vertical cross-sectional view of the lamp unit 1 of the present embodiment taken along the line AA of FIG. However, FIG. 5 is a vertical cross-sectional view of the lamp unit 1 to which a front cover 60 (not shown in FIG. 4) is added.
  • the lamp unit 1 includes a heat sink 10 (an example of a heat dissipation member), a light source device 20 attached to the heat sink 10, and an optical control member 30 arranged in front of the light source device 20.
  • a cover 40 that covers a part of the optical control member 30, a fan 50, and a front cover 60 (an example of a cover member) are provided.
  • the heat sink 10 and the front cover 60 form a duct 70.
  • the light source devices 20 are provided in a pair in which the light source devices 20 are arranged side by side, but only one light source device 20 may be provided, or three or more light source devices 20 may be provided. Further, the direction in which the light source devices 20 are arranged does not need to be parallel to the vehicle width direction, and need not be parallel to the horizontal direction. For example, the light source devices 20 may be provided in a pair so as to be vertically aligned.
  • the heat sink 10 holds the pair of light source devices 20 and has a function of discharging the heat transmitted from the pair of light source devices 20.
  • the heat sink 10 has a symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), corresponding to the pair of light source devices 20 arranged side by side. That is, of the left and right symmetrical structures, the left part is the part corresponding to the left light source device 20, and the right part is the part corresponding to the right light source device 20.
  • the heat sink 10 will be described on the left and right side portions of the left-right symmetrical configuration.
  • the heat sink 10 is provided with a base portion 11 on which the light source device 20 is arranged, a plurality of heat radiation fins 12 provided on the rear side of the base portion 11 and arranged in the vehicle width direction, and one side of the base portion 11 in the vertical direction (in FIG. 2). It is provided with a pair of positioning pins 11A provided on the lower side and spaced apart in the vehicle width direction and protruding to the front side, and a mounting portion 111.
  • a pair of screw screw holes 11B are formed in the base portion 11 on the center side in the vehicle width direction and at positions separated in the vertical direction.
  • a pair of screws N for fixing a light source device 20 described later are screwed and fixed.
  • a mounting portion 111 is formed on the outer side of the base portion 11 in the vehicle width direction, and a fastening member BT for fastening an optical control member 30 and a cover 40 described later is screwed and fixed to the mounting portion 111. ..
  • the fastening member BT is, for example, a screw.
  • the radiating fin 12 is a part that increases the heat radiation efficiency by increasing the contact area with the outside air.
  • the radiating fin 12 may be in the form of a pin, may be in the form of a straight straight fin, or may be in any shape.
  • the radiation fin 12 is formed on the rear side of the heat sink 10 (the side opposite to the side on which the light source device 20 is provided).
  • the heat sink 10 is the aluminum die-cast heat sink 10.
  • the heat sink 10 is not limited to this, and may be formed of a metal or resin having a high thermal conductivity.
  • the heat sink 10 has the flow path forming portion 17 below the base portion 11.
  • the flow path forming unit 17 forms a flow path of air in which a flow is formed by the fan 50.
  • the flow path forming portion 17 has groove portions 171 and 172 that are open on the front side and closed on the rear side.
  • the grooves 171 and 172 extend obliquely in the up-down direction in a manner of spreading outward from the lower side toward the upper side when viewed in the front-rear direction.
  • the groove portions 171 and 172 have upper ends that open upward and lower ends that open downward.
  • the front sides of the grooves 171 and 172 are covered with the front cover 60.
  • the groove portion 171 cooperates with the front cover 60 to form an inner duct portion 71 (an example of a first duct portion) (see FIG. 4) whose lower end communicates with the fan 50 and whose upper end opens toward the light source 22. . That is, the groove portion 171 forms a part of the air flow passage extending from the fan 50 to the light source device 20. Further, the groove portion 172 cooperates with the front cover 60 and extends between the fan 50 and the fastening member BT (mounting portion 111) to form the outer duct portion 72 (an example of the second duct portion) (see FIG. 4 ). To form.
  • Light source device 20 The light source devices 20 are provided in pairs that are arranged side by side. Hereinafter, one of the light source devices 20 will be representatively described unless otherwise specified.
  • the light source device 20 includes a heat transfer member 21, a light source 22 arranged on the heat transfer member 21, an opening 23A arranged on the heat transfer member 21, and provided at a position corresponding to the light source 22, and an external connector. And a connector 23 having a connector connector 23B to be connected.
  • the connector connecting portion 23B is located on the other side (upper side in FIG. 2) in the vertical direction than the heat transfer member 21, and is provided so that a part of the heat transfer member 21 protrudes rearward. As described above, this protruding portion is located in a portion having a shape cut out on the rear side of the heat radiation fin 12.
  • the heat transfer member 21 uses a plate material made of aluminum having an outer shape larger than that of the light source 22, but the material is not limited to aluminum, and a metal or resin other than aluminum having high thermal conductivity is used. And so on.
  • the heat transfer member 21 diffuses the heat generated by the light source 22 in a wide range quickly and efficiently transfers the heat to the heat sink 10 to enhance the cooling efficiency of the light source 22.
  • the light source 22 includes a substrate 22A having a light emitting region 22B that transmits light, and a light emitting chip (not shown) that is disposed on the back side of the substrate 22A and emits light for causing the light emitting region 22B to emit light.
  • the LD light source (laser light source) uses an LD chip (laser diode chip) as a light emitting chip.
  • the connecting portion 23 is, for example, insert-molded using an electrically insulating resin having excellent heat resistance so that the electrical wiring (not shown) for electrically connecting the light source 22 and the external connector is housed inside.
  • the electric wiring (not shown) has one end side led out to the opening 23A to be electrically connected to the light source 22, and the other end of the electric wiring (not shown) is a connector. It is led out into the connection portion 23B, and is electrically connected to the external connector.
  • the light source device 20 includes a pair of positioning holes 24A through which the pair of positioning pins 11A provided in the base portion 11 pass, and a pair of screw holes 11B provided at the base portion 11 at a position corresponding to the pair of positioning holes 24A. And a screw hole 24B, and can be fixed to the heat sink 10 by a screw N in a state of being positioned by the positioning pin 11A.
  • the optical control member 30 has a bilaterally symmetrical configuration with respect to the center in the left-right direction, corresponding to the pair of light source devices 20 arranged side by side. That is, of the left and right symmetrical structures, the left part is the part corresponding to the left light source device 20, and the right part is the part corresponding to the right light source device 20.
  • the optical control member 30 will be described on the left and right side portions of the left-right symmetrical configuration.
  • the optical control member 30 includes a compound optical lens 31 that irradiates the light from the light source 22 to the front side, and a fixing portion 32 that fixes the compound optical lens 31 together with the cover 40 to the heat sink 10.
  • the composite optical lens 31 and the fixing portion 32 are members integrally formed of transparent resin (for example, acrylic resin or polycarbonate resin).
  • the optical control member 30 may be made of glass.
  • the fixing portion 32 is provided with a leg portion 32A extending outward and a base portion 32B for fixing which is provided so as to be connected to the leg portion 32A.
  • the base portion 32B is provided at a position corresponding to the pair of positioning holes 32BA (see FIG. 4) through which the pair of positioning pins 11A provided in the base portion 11 pass and the mounting portion 111 provided outside the base portion 11.
  • the screw hole 32BB is provided, and is fixed to the heat sink 10 together with the cover 40 by the fastening member BT while being positioned by the positioning pin 11A.
  • the base 32B of the optical control member 30 is fixed to the heat sink 10 in the present embodiment, it may be arranged on the connecting portion 23 of the light source device 20.
  • the connection portion 23 functions as a heat insulator that insulates heat provided between the optical control member 30 and the heat transfer member 21, the optical control member 30 has a low heat resistance acrylic resin (for example, it may be possible to use a heat resistant temperature of about 100° C.).
  • the composite optical lens 31 is formed so as to obtain a desired light distribution, but the configuration itself of the composite optical lens 31 is arbitrary.
  • the compound optical lenses 31 provided as a pair may have different configurations so as to obtain a desired light distribution as a whole, instead of being bilaterally symmetrical.
  • the cover 40 opens the light exit surface 31A (see FIG. 2) of the compound optical lens 31 and the light entrance surface 31B (see FIG. 5) of the compound optical lens 31 so as not to be blocked, and opens the side surface of the compound optical lens 31.
  • a substantially cylindrical cover portion 41 for covering and a rear end side of the cover portion 41, which is provided so as to project outward from the cover portion 41, are provided with respect to the heat sink 10 together with the optical control member 30 and the light source device 20.
  • a flange portion 42 for fixing.
  • the flange portion 42 is provided at a position corresponding to the pair of positioning holes 42A (see FIG. 4) through which the pair of positioning pins 11A provided in the base portion 11 pass and the mounting portion 111 provided outside the base portion 11. And the screw hole 42B, which is positioned by the positioning pin 11A and is fixed to the heat sink 10 together with the optical control member 30 by the fastening member BT.
  • the cover 40 is for suppressing light from leaking from a position other than the emission surface 31A of the compound optical lens 31, and in the present embodiment, is made of an opaque resin that does not transmit light. There is.
  • the cover 40 may be formed of a transparent resin that allows light to pass therethrough, and a colored layer that suppresses the transmission of light may be formed on the surface thereof.
  • the cover 40 has a lower end portion which is vertically closer to or in contact with an upper end portion of the front cover 60.
  • the cover 40 may be provided such that the lower portion thereof overlaps the upper portion of the front cover 60.
  • the lower part of the cover 40 (a part below the optical control member 30) is located between the inner duct part 71 and the gap 90 and forms a part of the air flow passage.
  • the cover 40 preferably inclines in such a manner that the lower inner surface (the surface on the side of the air flow passage) is directed downward as it goes downward.
  • the portion of the air flow passage formed by the cover 40 has a taper shape in which the upper side is narrowed, and the flow velocity of air toward the light source device 20 can be efficiently increased.
  • the fan 50 is an example of a blower, and operates, for example, electrically. Only one fan 50 is provided in common for the two light source devices 20. However, in other embodiments, the fan 50 may be provided for each light source device 20.
  • the fan 50 generates an air flow upward.
  • the fan 50 has a function of cooling the heat sink 10 by generating a flow of air passing between the heat radiation fins 12 of the heat sink 10 (hereinafter, also referred to as “heat sink cooling function”).
  • the fan 50 cooperates with a duct 70 described later by generating a flow of air between the light source 22 and the optical control member 30, so that heat or energy from the light source 22 causes the optical control member 30 to reach the optical control member 30. It has a function of reducing the influence (hereinafter, also referred to as “lens heat protection function”).
  • the air flow in the description is the flow formed by the fan 50.
  • the fan 50 is provided so as to cover the lower part of the heat radiation fin 12 of the heat sink 10 and the lower part between the light source 22 and the optical control member 30.
  • the fan 50 may be provided at any position as long as the heat sink cooling function and the lens heat protection function described above are ensured.
  • the fan 50 may be provided above or laterally between the light source 22 and the optical control member 30.
  • the fan 50 may be provided offset between the light source 22 and the optical control member 30.
  • the duct 70 is configured to absorb the offset, the lens heat protection function described above can be ensured.
  • a fan for realizing the heat sink cooling function described above and a fan for realizing the lens heat protection function described above may be separately provided.
  • the fan 50 may always operate in the lighting state of the lamp unit 1, or may operate in the lighting state of the lamp unit 1 when a predetermined operation condition is satisfied.
  • the front cover 60 is made of resin, for example.
  • the front cover 60 has a plate shape. Only one front cover 60 is provided in common for the two light source devices 20. However, in other embodiments, the front cover 60 may be provided for each light source device 20.
  • the front cover 60 covers the left and right groove portions 171 and 172 of the heat sink 10 from the front.
  • the front cover 60 is a member that forms the inner duct portions 71 and 72 as described above, it preferably has a structure having a high degree of airtightness (that is, a structure without holes or the like), and a mode with a high degree of airtightness. Is connected to peripheral parts.
  • the front cover 60 covers substantially the entire inner groove 171 but does not cover the upper groove and the outer groove 172.
  • the front cover 60 may cover substantially the entire groove 172 on the outer side up to the fastening member BT. Further, as described above, the upper end of the front cover 60 approaches or abuts the lower part of the cover 40 in the vertical direction.
  • the duct 70 has a function of guiding the flow of air generated by the fan 50 to the light source device 20 and the fastening member BT.
  • the duct 70 has a bilaterally symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), corresponding to the pair of light source devices 20 arranged side by side.
  • the duct 70 will be described on the left and right side portions of the symmetrical configuration.
  • the duct 70 includes an inner duct portion 71 and an outer duct portion 72.
  • the inner duct portion 71 and the outer duct portion 72 are formed by the heat sink 10 and the front cover 60, as described above.
  • some or all of the inner duct portion 71 and the outer duct portion 72 may be formed by members different from the heat sink 10 and the front cover 60.
  • the heat sink 10 may have a configuration in which the inner duct portion 71 and the outer duct portion 72 are not formed at all.
  • the inner duct portion 71 has a lower end communicating with the fan 50 and an upper end opening toward the light source 22.
  • the inner duct portion 71 has a tapered shape in which the flow velocity at the upper end is higher than that at the lower end side when viewed from the side (when viewed in the left-right direction). That is, the inner duct portion 71 has a tapered shape that narrows (constricts) from the lower side to the upper side in a side view.
  • the inner duct portion 71 has a taper over the entire vertical direction, but in other embodiments, it may have a taper over only a part of the vertical direction.
  • the opening on the upper end side of the inner duct portion 71 is also referred to as the “outlet opening portion 711 of the inner duct portion 71”.
  • the inner duct portion 71 further has a tapered shape such that the flow velocity at the upper end is higher than at the lower end side even when viewed from the front (when viewed in the front-back direction). That is, the width d2 of the outlet opening 711 of the inner duct portion 71 and the width d0 of the inlet opening (see FIG. 4) are d0>d2.
  • the width d2 of the outlet opening 711 of the inner duct portion 71 may be determined according to the size of the entrance surface 31B of the complex optical lens 31.
  • the inner duct portion 71 has a tapered shape in which the upper side is narrowed, so that the flow velocity of the air flow from the fan 50 can be increased, and the air whose flow velocity has been increased can be increased. It can flow into the light source device 20 through the outlet opening 711.
  • the inner duct portion 71 may have a tapered shape in which the upper side becomes thinner only in one of the front view and the side view or only in the other direction.
  • one inner duct part 71 is provided for one light source device 20 as described above, but in other embodiments, the inner duct part 71 is one light source device 20. However, a plurality of them may be provided.
  • the inner duct part 71 is preferably constructed and arranged so as to have an outlet opening 711 in the vicinity of the light source 22.
  • the inner duct portion 71 extends near the lower end of the entrance surface 31B of the optical control member 30.
  • the air flowing out from the outlet opening 711 of the inner duct portion 71 can efficiently flow into the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22, and the lens heat protection function can be achieved. Can be increased.
  • the gap 90 is defined as a space that includes each line segment that connects each point of the incident surface 31B of the optical control member 30 and the light emission center of the light source 22 for convenience.
  • the inner duct portion 71 is preferably arranged so that the outlet opening 711 faces the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22. That is, when viewed in the flow direction (main flow direction) of the air flowing inside the inner duct portion 71, the outlet opening 711 is positioned with respect to the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22. , At least partially overlapping. Also in this case, the air flowing out from the outlet opening 711 of the inner duct portion 71 can efficiently flow into the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22, and the lens heat protection function can be achieved. Can be increased.
  • the outer duct portion 72 extends between the fan 50 and the fastening member BT (mounting portion 111).
  • the outer duct portion 72 has a tapered shape in which the flow velocity at the upper end is higher than that at the lower end side when viewed from the side (when viewed in the left-right direction).
  • the outer duct portion 72 has a taper over the entire vertical direction, but in other embodiments, the outer duct portion 72 may have a taper over only a part of the vertical direction.
  • the outer duct portion 72 further has a tapered shape such that the flow velocity at the upper end is higher than at the lower end side even when viewed from the front (when viewed in the front-back direction). That is, the downstream side width d3 of the outer duct portion 72 and the inlet opening width d4 (see FIG. 4) are d4>d3.
  • the outer duct portion 72 has a tapered shape in which the upper side is narrowed, so that the flow velocity of the air from the fan 50 can be increased, and the air whose flow velocity has been increased can be increased. It can be applied to the fastening member BT (mounting portion 111).
  • the outer duct portion 72 may have a tapered shape in which the upper side becomes thinner only in one of a front view and a side view or only in another direction.
  • FIG. 6 is a vertical cross-sectional view of the lamp unit 1 of the present embodiment taken along the line BB of FIG.
  • the inner duct portion 71 has a tapered shape in which the flow velocity is higher at the upper end than at the lower end. Therefore, the air flowing through the inner duct portion 71 has a higher flow velocity as it goes upward.
  • the air whose flow velocity has been increased in this way flows out upward from the outlet opening 711 and passes through the blower flow passage portion between the cover 40 and the light source device 20 as shown by an arrow R2.
  • the air flow passage portion between the cover 40 and the light source device 20 also has a tapered shape in which the upper side is narrowed, so that the air flow is generated in the air flow passage portion between the cover 40 and the light source device 20. Can also be accelerated. After that, the air whose flow velocity has been increased in this way flows into the gap 90 between the optical control member 30 and the light source 22. At this time, the light source device 20 itself including the light source 22 is also cooled by direct contact with air (wind).
  • the outer duct portion 72 has a tapered shape in which the flow velocity is higher at the upper end than at the lower end side. Therefore, the air flowing through the outer duct portion 72 has a higher flow velocity as it goes upward.
  • the air whose flow velocity has been increased in this way passes around the mounting portion 111, cools around the mounting portion 111, and flows out to the outside (see arrow R6). Thereby, the lens heat protection function is realized.
  • the distance between the LD light source (laser light source) and the optical component becomes a layout closer to that of the LED. That is, the distance ⁇ 1 between the optical control member 30 and the light source 22 in the present embodiment (distance between the light sources 22 in the optical axis direction, see FIG. 5) is greater when the LD light source (laser light source) is used. Will tend to be shorter than when using. For example, when using an LD light source (laser light source), the gap between the optical control member 30 and the light source 22 tends to be about 0.3 mm to 5 mm.
  • the light source 22 is likely to have an adverse effect on the optical control member 30 (for example, melting damage of the optical control member 30).
  • the light energy emitted from the light source 22 and the space temperature increase that is, the temperature increase in the gap 90
  • the optical control member 30 may be melted and damaged.
  • the air is forced to flow from the fan 50 through the inner duct portion 71 toward the gap 90 between the optical control member 30 and the light source 22.
  • the temperature rise in the gap 90 can be reduced.
  • the inner duct portion 71 has a tapered shape in which the flow velocity is high on the side of the outlet opening 711, the air passing through the gap 90 between the optical control member 30 and the light source 22.
  • the flow rate of can be increased.
  • the cover 40 and the front cover 60 are close to or in contact with each other in the vertical direction, so that the gap 90 and the outlet opening 711 are substantially closed in the vertical direction.
  • the width ⁇ 3 of the outlet opening 711 of the inner duct portion 71 is slightly larger than the distance ⁇ 1 between the optical control member 30 and the light source 22, Since the flow velocity of the air passing through the gap 90 between the optical control member 30 and the light source 22 can be made faster than the flow velocity at the outlet opening 711 of the inner duct portion 71, the temperature rise in the gap 90 can be prevented. It can be reduced efficiently.
  • the width ⁇ 3 of the outlet opening 711 of the inner duct portion 71 is slightly larger than the distance ⁇ 1 between the optical control member 30 and the light source 22, as described above, in the air flow direction. Due to the loss between the outlet opening 711 of the inner duct portion 71 and the gap 90, the gap between the optical control member 30 and the light source 22 is faster than the flow velocity at the outlet opening 711 of the inner duct portion 71. In some cases, the flow rate of air through 90 may not be fast.
  • the width of the flow path (air flow path portion) at the upper end position of the cover 40 is ⁇ 2
  • the relationship with the width ⁇ 3 of the outlet opening 711 of the duct portion 71 is ⁇ 1 ⁇ 2 ⁇ 3.
  • it may be ⁇ 1 ⁇ 2 ⁇ 3, ⁇ 1 ⁇ 2 ⁇ 3, or ⁇ 1 ⁇ 2 ⁇ 3.
  • the optical control member 30 is caused by heat conduction through a component such as the heat sink 10 interposed between the optical control member 30 and the light source 22.
  • the fixing portion 32 that is, the vicinity of the screw hole 32BB) that is the mounting portion of 30 may exceed the heat resistant temperature of the material and may be melted.
  • the outer duct portion 72 that opens toward the attachment portion 111 is provided. Therefore, the fixed portion 32 of the optical control member 30 can be cooled by the air flowed into the gap 90 by the fan 50. This can reduce the possibility that the fixing portion 32 of the optical control member 30 will be melted.
  • outer duct portion 72 is provided in the above-described embodiment, the outer duct portion 72 may be omitted.
  • the heat sink 10, the optical control member 30, and the like have a bilaterally symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), but there may be some difference between the left and right, or a complete difference. It may have an asymmetrical structure.
  • the lower portion of the cover 40 forms a part of the air flow passage between the inner duct portion 71 and the gap 90, but by extending the upper end of the front cover 60 upward, The functions of the lower part of 40 may be realized.
  • the positions of the positioning holes 42A (the positioning holes 32BA and the positioning holes 24A) may be set to other positions (for example, the upper portion of the cover 40).
  • Lamp Unit 10 Heat Sink 11 Base 11A Positioning Pin 11B Screwing Hole 12 Radiating Fin 20 Light Source Device 21 Heat Transfer Member 22 Light Source 22A Substrate 22B Light Emitting Area 23 Connection 23A Opening 23B Connector Connection 24A Positioning Hole 24B Screw Hole 30 Optical control member 31 Complex optical lens 31B Incident surface 32 Fixing portion 32A Leg portion 32B Base portion 32BA Positioning hole 32BB Screw hole 40 Cover 41 Covering portion 41A Notch portion 42 Flange portion 42A Positioning hole 42B Screw hole 70 Duct 71 Inner duct portion 711 Exit Opening 72 Outer duct 90 Gap N Screw BT Fastening members 101L, 101R Vehicle headlight 102 Vehicle

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

This vehicle lamp is provided with a laser light source, an optical component which has an incident surface of light from the laser light source, a blower, and a first duct part which communicates at one end with the blower and opens at the other end towards the laser light source, wherein the first duct part has a tapered shape which narrows from said one end towards said other end.

Description

車両用灯具Vehicle lighting
　本開示は、車両用灯具に関する。 The present disclosure relates to a vehicle lighting device.
　特許文献１には、レンズ自身にシェードと反射鏡を一体に形成した複合光学レンズを用いた異なる配光特性の複数の光源ユニットでロービーム配光パターンを形成するようにした車両用灯具が開示されている。 Patent Document 1 discloses a vehicular lamp in which a low beam light distribution pattern is formed by a plurality of light source units having different light distribution characteristics, which uses a compound optical lens in which a shade and a reflecting mirror are integrally formed on the lens itself. ing.
　また、特許文献２には、光源に熱的に接続されるヒートシンクの背面に送風するファンを設ける車両用灯具が開示されている。 Further, Patent Document 2 discloses a vehicle lighting device in which a fan that blows air is provided on the back surface of a heat sink that is thermally connected to a light source.
特開２００４－２４１３４９号公報JP, 2004-241349, A 特開２０１２－２１２５２１号公報JP, 2012-212521, A
　ところで、光源としてレーザ光源を使用する場合、光源としてＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）を用いる場合に比べて、光学部品とレーザ光源との間の距離（隙間）が短くなる傾向があり、レーザ光源による光学部品への影響（例えば溶損）を低減することが難しくなる。 By the way, when a laser light source is used as the light source, the distance (gap) between the optical component and the laser light source tends to be shorter than when an LED (Light Emitting Diode) is used as the light source. It becomes difficult to reduce the influence (eg, melting loss) on the parts.
　そこで、１つの側面では、レーザ光源による光学部品への影響を効率的に低減することを目的とする。 Therefore, in one aspect, the aim is to effectively reduce the influence of the laser light source on the optical components.
　１つの側面では、レーザ光源と、
　前記レーザ光源からの光の入射面を有する光学部品と、
　送風機と、
　一端が前記送風機に連通し、他端が前記レーザ光源に向けて開口する第１ダクト部とを備え、
　前記第１ダクト部は、前記一端側から前記他端側に向けて窄まるテーパ状の形態を有する、車両用灯具が提供される。 In one aspect, a laser light source,
An optical component having an incident surface of light from the laser light source,
A blower,
One end communicates with the blower, and the other end has a first duct portion that opens toward the laser light source,
A vehicular lamp is provided in which the first duct portion has a tapered shape that narrows from the one end side toward the other end side.
　１つの側面では、レーザ光源による光学部品への影響を効率的に低減することが可能となる。 In one aspect, it is possible to effectively reduce the influence of laser light sources on optical components.
本実施形態の車両用灯具を備えた車両の平面図である。It is a top view of the vehicle provided with the vehicle lamp of this embodiment. 本実施形態の灯具ユニットの斜視図である。It is a perspective view of the lamp unit of this embodiment. 本実施形態の灯具ユニットの分解斜視図である。It is an exploded perspective view of the lamp unit of this embodiment. フロントカバーを取り外した状態の本実施形態の灯具ユニットの正面図である。It is a front view of the lamp unit of the present embodiment with a front cover removed. 図４のラインＡ－Ａに沿った本実施形態の灯具ユニットの縦断面図である。FIG. 5 is a vertical cross-sectional view of the lamp unit of the present embodiment taken along the line AA of FIG. 4. 図４のラインＢ－Ｂに沿った本実施形態の灯具ユニットの縦断面図である。FIG. 5 is a vertical cross-sectional view of the lamp unit of the present embodiment taken along the line BB of FIG. 4.
　以下、添付図面を参照して、実施形態について詳細に説明する。 Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
　なお、実施形態の説明の全体を通して同じ要素には同じ番号又は符号を付している。 Note that throughout the description of the embodiments, the same numbers are assigned to the same elements.
　また、実施形態及び図中において、特に断りがない場合、「前」、「後」は、各々、車両１０２の「前進方向」、「後進方向」を示し、「上」、「下」、「左」、「右」は、各々、車両１０２に乗車する運転者から見た方向を示す。 Further, in the embodiment and the drawings, unless otherwise specified, “front” and “rear” indicate “forward direction” and “reverse direction” of the vehicle 102, and “up”, “down”, and “reverse direction”, respectively. “Left” and “right” respectively indicate directions viewed from the driver who gets on the vehicle 102.
　なお、言うまでもないが「上」、「下」は鉛直方向での「上」、「下」でもあり、「左」、「右」は水平方向での「左」、「右」でもある。 Needless to say, "upper" and "lower" are also "upper" and "lower" in the vertical direction, and "left" and "right" are also "left" and "right" in the horizontal direction.
　図１は、本実施形態の車両用灯具を備えた車両１０２の平面図である。 FIG. 1 is a plan view of a vehicle 102 including the vehicle lighting device of this embodiment.
　図１に示すように、本実施形態の車両用灯具は、車両１０２の前方側の左右のそれぞれに設けられる車両用の前照灯（１０１Ｌ、１０１Ｒ）であり、以下では単に車両用灯具と記載する。 As shown in FIG. 1, the vehicular lamp of the present embodiment is a vehicular headlamp (101L, 101R) provided on each of the front side and the left side of the vehicle 102, and is hereinafter simply referred to as a vehicular lamp. To do.
　本実施形態の車両用灯具は、車両前方側に開口したハウジング（図示せず）と開口を覆うようにハウジングに取り付けられるアウターレンズ（図示せず）を備え、ハウジングとアウターレンズとで形成される灯室内に灯具ユニット１（図２参照）等が配置されている。 The vehicle lamp of the present embodiment includes a housing (not shown) that is open to the front side of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed of the housing and the outer lens. The lamp unit 1 (see FIG. 2) and the like are arranged in the lamp chamber.
　図２は、本実施形態の灯具ユニット１の斜視図である。図３は、本実施形態の灯具ユニット１の分解斜視図である。図４は、フロントカバー６０を取り外した状態の本実施形態の灯具ユニット１の正面図である。図５は、図４のラインＡ－Ａに沿った本実施形態の灯具ユニット１の縦断面図である。ただし、図５は、図４には図示を省略したフロントカバー６０が付加された状態の灯具ユニット１の縦断面図である。 FIG. 2 is a perspective view of the lamp unit 1 of this embodiment. FIG. 3 is an exploded perspective view of the lamp unit 1 of this embodiment. FIG. 4 is a front view of the lamp unit 1 of the present embodiment with the front cover 60 removed. FIG. 5 is a vertical cross-sectional view of the lamp unit 1 of the present embodiment taken along the line AA of FIG. However, FIG. 5 is a vertical cross-sectional view of the lamp unit 1 to which a front cover 60 (not shown in FIG. 4) is added.
　図２から図５に示すように、灯具ユニット１は、ヒートシンク１０（放熱部材の一例）と、ヒートシンク１０に取り付けられる光源装置２０と、光源装置２０の前方側に配置される光学制御部材３０と、光学制御部材３０の一部を覆うカバー４０と、ファン５０と、フロントカバー６０（カバー部材の一例）と、を備えている。そして、灯具ユニット１は、ヒートシンク１０とフロントカバー６０とによりダクト７０が形成されている。 As shown in FIGS. 2 to 5, the lamp unit 1 includes a heat sink 10 (an example of a heat dissipation member), a light source device 20 attached to the heat sink 10, and an optical control member 30 arranged in front of the light source device 20. A cover 40 that covers a part of the optical control member 30, a fan 50, and a front cover 60 (an example of a cover member) are provided. In the lamp unit 1, the heat sink 10 and the front cover 60 form a duct 70.
　なお、本実施形態では、一例として、光源装置２０が左右に並ぶ態様の対で設けられるが、光源装置２０は１つだけ設けられてもよいし、３つ以上設けられてもよい。また、光源装置２０の並ぶ方向も車幅方向に平行である必要はなく、また、水平方向に対して平行である必要もない。例えば、光源装置２０は、上下に並ぶ態様で対で設けられてもよい。 Note that, in the present embodiment, as an example, the light source devices 20 are provided in a pair in which the light source devices 20 are arranged side by side, but only one light source device 20 may be provided, or three or more light source devices 20 may be provided. Further, the direction in which the light source devices 20 are arranged does not need to be parallel to the vehicle width direction, and need not be parallel to the horizontal direction. For example, the light source devices 20 may be provided in a pair so as to be vertically aligned.
（ヒートシンク１０）
　ヒートシンク１０は、対の光源装置２０を保持し、対の光源装置２０から伝わる熱を放出する機能を有する。ヒートシンク１０は、左右に並ぶ態様の対の光源装置２０に対応して、左右方向（車両幅方向）の中心に関して左右対称な構成を有する。すなわち、左右の対称な構成のうちの、左部分は、左側の光源装置２０に対応した部分であり、右部分は、右側の光源装置２０に対応した部分である。以下では、特に言及しない限り、ヒートシンク１０について、左右対称な構成のうちの、左右の一方側の部分について説明する。 (Heat sink 10)
The heat sink 10 holds the pair of light source devices 20 and has a function of discharging the heat transmitted from the pair of light source devices 20. The heat sink 10 has a symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), corresponding to the pair of light source devices 20 arranged side by side. That is, of the left and right symmetrical structures, the left part is the part corresponding to the left light source device 20, and the right part is the part corresponding to the right light source device 20. Hereinafter, unless otherwise stated, the heat sink 10 will be described on the left and right side portions of the left-right symmetrical configuration.
　ヒートシンク１０は、光源装置２０を配置するベース部１１と、ベース部１１の後方側に設けられ、車両幅方向に並ぶ複数の放熱フィン１２と、ベース部１１の鉛直方向の一方側（図２では下側）に設けられ、前方側に突出する車両幅方向に離間した一対の位置決めピン１１Ａと、取付部１１１とを備えている。 The heat sink 10 is provided with a base portion 11 on which the light source device 20 is arranged, a plurality of heat radiation fins 12 provided on the rear side of the base portion 11 and arranged in the vehicle width direction, and one side of the base portion 11 in the vertical direction (in FIG. 2). It is provided with a pair of positioning pins 11A provided on the lower side and spaced apart in the vehicle width direction and protruding to the front side, and a mounting portion 111.
　なお、ヒートシンク１０は、ベース部１１には、車両幅方向の中央側であって、鉛直方向に離間する位置に一対のネジ螺合孔１１Ｂが形成されており、一対のネジ螺合孔１１Ｂには、後述する光源装置２０を止着させる一対のネジＮが螺合固定される。 In the heat sink 10, a pair of screw screw holes 11B are formed in the base portion 11 on the center side in the vehicle width direction and at positions separated in the vertical direction. A pair of screws N for fixing a light source device 20 described later are screwed and fixed.
　また、ベース部１１の車両幅方向の外側に、取付部１１１が形成されており、取付部１１１には、後述する光学制御部材３０及びカバー４０を止着させる締結部材ＢＴが螺合固定される。締結部材ＢＴは、例えばネジである。 Further, a mounting portion 111 is formed on the outer side of the base portion 11 in the vehicle width direction, and a fastening member BT for fastening an optical control member 30 and a cover 40 described later is screwed and fixed to the mounting portion 111. .. The fastening member BT is, for example, a screw.
　放熱フィン１２は、外気との接触面積を増大することで放熱効率を高める部位である。放熱フィン１２は、ピンの形態であってもよいし、直線状のストレートフィンの形態であってもよいし、形状等は任意である。本実施形態では、放熱フィン１２は、ヒートシンク１０の後方側（光源装置２０が設けられる側とは逆側）に形成される。 The radiating fin 12 is a part that increases the heat radiation efficiency by increasing the contact area with the outside air. The radiating fin 12 may be in the form of a pin, may be in the form of a straight straight fin, or may be in any shape. In the present embodiment, the radiation fin 12 is formed on the rear side of the heat sink 10 (the side opposite to the side on which the light source device 20 is provided).
　本実施形態では、ヒートシンク１０はアルミダイカスト製のヒートシンク１０になっているが、これに限定される必要はなく、熱伝導率の高い金属又は樹脂等を用いて形成されたものであればよい。 In the present embodiment, the heat sink 10 is the aluminum die-cast heat sink 10. However, the heat sink 10 is not limited to this, and may be formed of a metal or resin having a high thermal conductivity.
　本実施形態では、ヒートシンク１０は、ベース部１１の下方に流路形成部１７を有する。流路形成部１７は、ファン５０によって流れが形成される空気の流路を形成する。流路形成部１７は、前側が開口し後側が閉塞した溝部１７１，１７２を有する。 In this embodiment, the heat sink 10 has the flow path forming portion 17 below the base portion 11. The flow path forming unit 17 forms a flow path of air in which a flow is formed by the fan 50. The flow path forming portion 17 has groove portions 171 and 172 that are open on the front side and closed on the rear side.
　溝部１７１，１７２は、前後方向に視て、下側から上側に向かうにつれて外側に広がる態様で、上下方向で斜めに延在する。溝部１７１，１７２は、上端が上側に開口し、下端が下側に開口する。溝部１７１，１７２は、前側がフロントカバー６０に覆われる。 The grooves 171 and 172 extend obliquely in the up-down direction in a manner of spreading outward from the lower side toward the upper side when viewed in the front-rear direction. The groove portions 171 and 172 have upper ends that open upward and lower ends that open downward. The front sides of the grooves 171 and 172 are covered with the front cover 60.
　溝部１７１は、フロントカバー６０と協動して、下端がファン５０に連通し、上端が光源２２に向けて開口する内側ダクト部７１（第１ダクト部の一例）（図４参照）を形成する。すなわち、溝部１７１は、ファン５０から光源装置２０まで延在する送風流路のうちの一部を形成する。また、溝部１７２は、フロントカバー６０と協動して、ファン５０と締結部材ＢＴ（取付部１１１）との間に延在する外側ダクト部７２（第２ダクト部の一例）（図４参照）を形成する。 The groove portion 171 cooperates with the front cover 60 to form an inner duct portion 71 (an example of a first duct portion) (see FIG. 4) whose lower end communicates with the fan 50 and whose upper end opens toward the light source 22. . That is, the groove portion 171 forms a part of the air flow passage extending from the fan 50 to the light source device 20. Further, the groove portion 172 cooperates with the front cover 60 and extends between the fan 50 and the fastening member BT (mounting portion 111) to form the outer duct portion 72 (an example of the second duct portion) (see FIG. 4 ). To form.
（光源装置２０）
　光源装置２０は、左右に並ぶ態様の対で設けられる。以下では、特に言及しない限り、一方の光源装置２０について代表して説明する。 (Light source device 20)
The light source devices 20 are provided in pairs that are arranged side by side. Hereinafter, one of the light source devices 20 will be representatively described unless otherwise specified.
　光源装置２０は、熱伝達部材２１と、熱伝達部材２１上に配置された光源２２と、熱伝達部材２１上に配置され、光源２２に対応する位置に設けられた開口部２３Ａと外部コネクタが接続されるコネクタ接続部２３Ｂを有する接続部２３と、を備えている。 The light source device 20 includes a heat transfer member 21, a light source 22 arranged on the heat transfer member 21, an opening 23A arranged on the heat transfer member 21, and provided at a position corresponding to the light source 22, and an external connector. And a connector 23 having a connector connector 23B to be connected.
　なお、コネクタ接続部２３Ｂは、熱伝達部材２１よりも鉛直方向の他方側（図２では上側）に位置し、熱伝達部材２１よりも一部が後方側に出っ張るように設けられており、先に触れたように、この出っ張った部分が、放熱フィン１２の後方側に切欠かれたような形状の部分に位置することになる。 The connector connecting portion 23B is located on the other side (upper side in FIG. 2) in the vertical direction than the heat transfer member 21, and is provided so that a part of the heat transfer member 21 protrudes rearward. As described above, this protruding portion is located in a portion having a shape cut out on the rear side of the heat radiation fin 12.
　本実施形態では、熱伝達部材２１は、光源２２よりも外形の大きいアルミ製の板材を用いているが、材料はアルミに限定される必要はなく、熱伝導率の高いアルミ以外の金属又は樹脂等であってもよい。 In the present embodiment, the heat transfer member 21 uses a plate material made of aluminum having an outer shape larger than that of the light source 22, but the material is not limited to aluminum, and a metal or resin other than aluminum having high thermal conductivity is used. And so on.
　そして、熱伝達部材２１は、光源２２で発生する熱を速やかに広い範囲に拡散しつつ、熱を効率よくヒートシンク１０に伝達して光源２２の冷却効率を高める役目を果たす。 The heat transfer member 21 diffuses the heat generated by the light source 22 in a wide range quickly and efficiently transfers the heat to the heat sink 10 to enhance the cooling efficiency of the light source 22.
　光源２２は、光を透過する発光領域２２Ｂを有する基板２２Ａと、基板２２Ａの裏側に配置され、発光領域２２Ｂを発光させるための光を出射する発光チップ（図示せず）と、を備え、本実施形態では、発光チップにＬＤチップ（レーザーダイオードチップ）が用いられたＬＤ光源（レーザー光源）になっている。 The light source 22 includes a substrate 22A having a light emitting region 22B that transmits light, and a light emitting chip (not shown) that is disposed on the back side of the substrate 22A and emits light for causing the light emitting region 22B to emit light. In the embodiment, the LD light source (laser light source) uses an LD chip (laser diode chip) as a light emitting chip.
　接続部２３は、例えば、耐熱性に優れた電気絶縁樹脂を用いたインサート成形で、光源２２と外部コネクタとの電気的な接続を行うための電気配線（図示せず）を内部に収容するように形成された部材であり、その電気配線（図示せず）の一端側が開口部２３Ａに導出され光源２２との電気的な接続が行われ、その電気配線（図示せず）の他端側がコネクタ接続部２３Ｂ内に導出され、外部コネクタとの電気的な接続が行われるようになっている。 The connecting portion 23 is, for example, insert-molded using an electrically insulating resin having excellent heat resistance so that the electrical wiring (not shown) for electrically connecting the light source 22 and the external connector is housed inside. The electric wiring (not shown) has one end side led out to the opening 23A to be electrically connected to the light source 22, and the other end of the electric wiring (not shown) is a connector. It is led out into the connection portion 23B, and is electrically connected to the external connector.
　そして、光源装置２０は、ベース部１１に設けられた一対の位置決めピン１１Ａを通す一対の位置決め孔２４Ａと、ベース部１１に設けられたネジ螺合孔１１Ｂに対応する位置に設けられた一対のネジ孔２４Ｂと、を備えており、位置決めピン１１Ａで位置決めされた状態でネジＮによってヒートシンク１０に対して固定できるようになっている。 The light source device 20 includes a pair of positioning holes 24A through which the pair of positioning pins 11A provided in the base portion 11 pass, and a pair of screw holes 11B provided at the base portion 11 at a position corresponding to the pair of positioning holes 24A. And a screw hole 24B, and can be fixed to the heat sink 10 by a screw N in a state of being positioned by the positioning pin 11A.
（光学制御部材３０）
　光学制御部材３０は、左右に並ぶ態様の対の光源装置２０に対応して、左右方向の中心に対して左右対称な構成を有する。すなわち、左右の対称な構成のうちの、左部分は、左側の光源装置２０に対応した部分であり、右部分は、右側の光源装置２０に対応した部分である。以下では、特に言及しない限り、光学制御部材３０について、左右対称な構成のうちの、左右の一方側の部分について説明する。 (Optical control member 30)
The optical control member 30 has a bilaterally symmetrical configuration with respect to the center in the left-right direction, corresponding to the pair of light source devices 20 arranged side by side. That is, of the left and right symmetrical structures, the left part is the part corresponding to the left light source device 20, and the right part is the part corresponding to the right light source device 20. Hereinafter, unless otherwise stated, the optical control member 30 will be described on the left and right side portions of the left-right symmetrical configuration.
　光学制御部材３０は、光源２２からの光を前方側に照射する複合光学レンズ３１と、複合光学レンズ３１をカバー４０とともにヒートシンク１０に対して固定するための固定部３２と、を備えており、複合光学レンズ３１と固定部３２が、透明な樹脂（例えば、アクリル系樹脂やポリカーボネート系樹脂）で一体成形された部材である。光学制御部材３０は、ガラスにより形成されてもよい。 The optical control member 30 includes a compound optical lens 31 that irradiates the light from the light source 22 to the front side, and a fixing portion 32 that fixes the compound optical lens 31 together with the cover 40 to the heat sink 10. The composite optical lens 31 and the fixing portion 32 are members integrally formed of transparent resin (for example, acrylic resin or polycarbonate resin). The optical control member 30 may be made of glass.
　固定部３２は、外側に延在する脚部３２Ａと、脚部３２Ａに繋がるように設けられた固定のための基部３２Ｂと、を備えている。 The fixing portion 32 is provided with a leg portion 32A extending outward and a base portion 32B for fixing which is provided so as to be connected to the leg portion 32A.
　そして、基部３２Ｂは、ベース部１１に設けられた一対の位置決めピン１１Ａを通す一対の位置決め孔３２ＢＡ（図４参照）と、ベース部１１の外側に設けられた取付部１１１に対応する位置に設けられたネジ孔３２ＢＢと、を備えており、位置決めピン１１Ａで位置決めされた状態で、締結部材ＢＴによってカバー４０とともにヒートシンク１０に対して固定される。 The base portion 32B is provided at a position corresponding to the pair of positioning holes 32BA (see FIG. 4) through which the pair of positioning pins 11A provided in the base portion 11 pass and the mounting portion 111 provided outside the base portion 11. The screw hole 32BB is provided, and is fixed to the heat sink 10 together with the cover 40 by the fastening member BT while being positioned by the positioning pin 11A.
　なお、本実施形態では、光学制御部材３０の基部３２Ｂは、ヒートシンク１０に固定されるが、光源装置２０の接続部２３上に配置されてもよい。この場合、接続部２３が光学制御部材３０と熱伝達部材２１の間に設けられた熱を絶縁する熱絶縁体としての機能を果たすことで、光学制御部材３０に耐熱性の低いアクリル系樹脂（例えば、耐熱温度１００℃程度）を使用することも可能となり得る。 Although the base 32B of the optical control member 30 is fixed to the heat sink 10 in the present embodiment, it may be arranged on the connecting portion 23 of the light source device 20. In this case, since the connection portion 23 functions as a heat insulator that insulates heat provided between the optical control member 30 and the heat transfer member 21, the optical control member 30 has a low heat resistance acrylic resin ( For example, it may be possible to use a heat resistant temperature of about 100° C.).
　また、本実施形態では、複合光学レンズ３１は、所望の配光が得られるように形成されるが、複合光学レンズ３１の構成自体は任意である。なお、対で設けられる複合光学レンズ３１は、左右の対称ではなく、全体として所望の配光が得られるように、互いに異なる構成であってもよい。 Further, in the present embodiment, the composite optical lens 31 is formed so as to obtain a desired light distribution, but the configuration itself of the composite optical lens 31 is arbitrary. The compound optical lenses 31 provided as a pair may have different configurations so as to obtain a desired light distribution as a whole, instead of being bilaterally symmetrical.
（カバー４０）
　カバー４０は、複合光学レンズ３１の光を出射する出射面３１Ａ（図２参照）及び光を入射させる入射面３１Ｂ（図５参照）を塞がないように開口し、複合光学レンズ３１の側面を覆う略円筒状の覆い部４１と、覆い部４１の後端側に位置し、覆い部４１から外側に突出するように設けられ、光学制御部材３０、及び、光源装置２０とともにヒートシンク１０に対して固定するためのフランジ部４２と、を備えている。 (Cover 40)
The cover 40 opens the light exit surface 31A (see FIG. 2) of the compound optical lens 31 and the light entrance surface 31B (see FIG. 5) of the compound optical lens 31 so as not to be blocked, and opens the side surface of the compound optical lens 31. A substantially cylindrical cover portion 41 for covering and a rear end side of the cover portion 41, which is provided so as to project outward from the cover portion 41, are provided with respect to the heat sink 10 together with the optical control member 30 and the light source device 20. And a flange portion 42 for fixing.
　フランジ部４２は、ベース部１１に設けられた一対の位置決めピン１１Ａを通す一対の位置決め孔４２Ａ（図４参照）と、ベース部１１の外側に設けられた取付部１１１に対応する位置に設けられたネジ孔４２Ｂと、を備えており、位置決めピン１１Ａで位置決めされた状態で、締結部材ＢＴによって、光学制御部材３０とともにヒートシンク１０に対して固定される。 The flange portion 42 is provided at a position corresponding to the pair of positioning holes 42A (see FIG. 4) through which the pair of positioning pins 11A provided in the base portion 11 pass and the mounting portion 111 provided outside the base portion 11. And the screw hole 42B, which is positioned by the positioning pin 11A and is fixed to the heat sink 10 together with the optical control member 30 by the fastening member BT.
　なお、カバー４０は、複合光学レンズ３１の出射面３１Ａ以外の位置から光が漏れるのを抑制するためのものであり、本実施形態では、光が透過しない不透明な樹脂で形成したものになっている。 The cover 40 is for suppressing light from leaking from a position other than the emission surface 31A of the compound optical lens 31, and in the present embodiment, is made of an opaque resin that does not transmit light. There is.
　ただし、カバー４０は、光が透過するような透明な樹脂で形成され、表面に光の透過を抑制する着色層を形成したものであってもよい。 However, the cover 40 may be formed of a transparent resin that allows light to pass therethrough, and a colored layer that suppresses the transmission of light may be formed on the surface thereof.
　本実施形態では、カバー４０は、図５に示すように、下端部がフロントカバー６０の上端部と上下方向に近接又は当接する。なお、別の実施形態では、カバー４０は、下部がフロントカバー６０の上部に重なる態様で設けられてもよい。 In the present embodiment, as shown in FIG. 5, the cover 40 has a lower end portion which is vertically closer to or in contact with an upper end portion of the front cover 60. In addition, in another embodiment, the cover 40 may be provided such that the lower portion thereof overlaps the upper portion of the front cover 60.
　カバー４０は、下部（光学制御部材３０よりも下方の部位）が、内側ダクト部７１と隙間９０との間に位置し、送風流路の一部を形成する。カバー４０は、好ましくは、側面視で、図５に示すように、下部の内面（送風流路側の表面）が、下方に向かうほど前方に向かう態様で傾斜する。これにより、送風流路のうちの、カバー４０が形成する部分は、上側が細くなるテーパ状となり、光源装置２０に向かう空気の流速を効率的に速めることができる。 The lower part of the cover 40 (a part below the optical control member 30) is located between the inner duct part 71 and the gap 90 and forms a part of the air flow passage. As shown in FIG. 5, the cover 40 preferably inclines in such a manner that the lower inner surface (the surface on the side of the air flow passage) is directed downward as it goes downward. As a result, the portion of the air flow passage formed by the cover 40 has a taper shape in which the upper side is narrowed, and the flow velocity of air toward the light source device 20 can be efficiently increased.
（ファン５０）
　ファン５０は、送風機の一例であり、例えば電動式で動作する。ファン５０は、２つの光源装置２０に対して共通で１つだけ設けられる。ただし、他の実施形態では、ファン５０は、光源装置２０ごとに設けられてもよい。 (Fan 50)
The fan 50 is an example of a blower, and operates, for example, electrically. Only one fan 50 is provided in common for the two light source devices 20. However, in other embodiments, the fan 50 may be provided for each light source device 20.
　ファン５０は、上向きに空気の流れを生成する。ファン５０は、ヒートシンク１０の放熱フィン１２間を通る空気の流れを生成することで、ヒートシンク１０を冷却する機能（以下、「ヒートシンク冷却機能」とも称する）を備える。また、ファン５０は、光源２２と光学制御部材３０の間に、空気の流れを生成することで、後述のダクト７０と協動して、光源２２からの熱又はエネルギによる光学制御部材３０への影響を低減する機能（以下、「レンズ熱保護機能」とも称する）を備える。以下では、特に言及しない限り、説明中の空気の流れは、ファン５０によって形成される流れである。 The fan 50 generates an air flow upward. The fan 50 has a function of cooling the heat sink 10 by generating a flow of air passing between the heat radiation fins 12 of the heat sink 10 (hereinafter, also referred to as “heat sink cooling function”). In addition, the fan 50 cooperates with a duct 70 described later by generating a flow of air between the light source 22 and the optical control member 30, so that heat or energy from the light source 22 causes the optical control member 30 to reach the optical control member 30. It has a function of reducing the influence (hereinafter, also referred to as “lens heat protection function”). In the following, unless otherwise stated, the air flow in the description is the flow formed by the fan 50.
　本実施形態では、一例として、ファン５０は、ヒートシンク１０の放熱フィン１２の下方と、光源２２と光学制御部材３０の間の下方とをカバーする態様で設けられる。ただし、ファン５０は、上述したヒートシンク冷却機能及びレンズ熱保護機能が確保される限り、任意の位置に設けられてよい。例えばレンズ熱保護機能に関しては、変形例では、ファン５０は、光源２２と光学制御部材３０の間の上方や側方に設けられてもよい。あるいは、ファン５０は、光源２２と光学制御部材３０の間に対して、オフセットして設けられてもよい。この場合、ダクト７０が当該オフセットを吸収するように構成されることで、上記のレンズ熱保護機能を確保することができる。また、上述したヒートシンク冷却機能を実現するためのファンと、上述したレンズ熱保護機能を実現するためのファンとが別々に設けられてもよい。 In the present embodiment, as an example, the fan 50 is provided so as to cover the lower part of the heat radiation fin 12 of the heat sink 10 and the lower part between the light source 22 and the optical control member 30. However, the fan 50 may be provided at any position as long as the heat sink cooling function and the lens heat protection function described above are ensured. For example, regarding the lens heat protection function, in a modified example, the fan 50 may be provided above or laterally between the light source 22 and the optical control member 30. Alternatively, the fan 50 may be provided offset between the light source 22 and the optical control member 30. In this case, since the duct 70 is configured to absorb the offset, the lens heat protection function described above can be ensured. Further, a fan for realizing the heat sink cooling function described above and a fan for realizing the lens heat protection function described above may be separately provided.
　ファン５０は、灯具ユニット１の点灯状態において常時動作してもよいし、灯具ユニット１の点灯状態において、所定の動作条件が成立した場合に動作してもよい。 The fan 50 may always operate in the lighting state of the lamp unit 1, or may operate in the lighting state of the lamp unit 1 when a predetermined operation condition is satisfied.
（フロントカバー６０）
　フロントカバー６０は、例えば樹脂により形成される。フロントカバー６０は、板状の形態である。フロントカバー６０は、２つの光源装置２０に対して共通で１つだけ設けられる。ただし、他の実施形態では、フロントカバー６０は、光源装置２０ごとに設けられてもよい。フロントカバー６０は、ヒートシンク１０の左右それぞれの溝部１７１，１７２を前方から覆う。 (Front cover 60)
The front cover 60 is made of resin, for example. The front cover 60 has a plate shape. Only one front cover 60 is provided in common for the two light source devices 20. However, in other embodiments, the front cover 60 may be provided for each light source device 20. The front cover 60 covers the left and right groove portions 171 and 172 of the heat sink 10 from the front.
　フロントカバー６０は、上述のように、内側ダクト部７１、７２を形成する部材であるので、好ましくは、ある程度気密性の高い構成（すなわち穴等のない構成）であり、ある程度気密性の高い態様で周辺部品に接続される。なお、本実施形態では、フロントカバー６０は、図２に示すように、内側の溝部１７１については略全体を覆うが、外側の溝部１７２については上側かつ外側の一部を覆わない。ただし、他の実施形態では、フロントカバー６０は、外側の溝部１７２についても、締結部材ＢＴに至るまでの略全体を覆ってもよい。また、フロントカバー６０は、上述のように、上端がカバー４０の下部に上下方向で近接又は当接する。 Since the front cover 60 is a member that forms the inner duct portions 71 and 72 as described above, it preferably has a structure having a high degree of airtightness (that is, a structure without holes or the like), and a mode with a high degree of airtightness. Is connected to peripheral parts. In this embodiment, as shown in FIG. 2, the front cover 60 covers substantially the entire inner groove 171 but does not cover the upper groove and the outer groove 172. However, in other embodiments, the front cover 60 may cover substantially the entire groove 172 on the outer side up to the fastening member BT. Further, as described above, the upper end of the front cover 60 approaches or abuts the lower part of the cover 40 in the vertical direction.
（ダクト７０）
　ダクト７０は、ファン５０により発生される空気の流れを、光源装置２０及び締結部材ＢＴに導く機能を有する。ダクト７０は、左右に並ぶ態様の対の光源装置２０に対応して、左右方向（車両幅方向）の中心に関して左右対称な構成を有する。以下では、特に言及しない限り、ダクト７０について、左右対称な構成のうちの、左右の一方側の部分について説明する。 (Duct 70)
The duct 70 has a function of guiding the flow of air generated by the fan 50 to the light source device 20 and the fastening member BT. The duct 70 has a bilaterally symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), corresponding to the pair of light source devices 20 arranged side by side. Hereinafter, unless otherwise specified, the duct 70 will be described on the left and right side portions of the symmetrical configuration.
　ダクト７０は、内側ダクト部７１及び外側ダクト部７２を含む。内側ダクト部７１及び外側ダクト部７２は、上述したように、ヒートシンク１０とフロントカバー６０とにより形成される。ただし、他の実施形態では、内側ダクト部７１及び外側ダクト部７２の一部又は全部は、ヒートシンク１０及びフロントカバー６０とは異なる部材により形成されてもよい。この場合、例えばヒートシンク１０は、内側ダクト部７１及び外側ダクト部７２を一切形成しない構成であってもよい。 The duct 70 includes an inner duct portion 71 and an outer duct portion 72. The inner duct portion 71 and the outer duct portion 72 are formed by the heat sink 10 and the front cover 60, as described above. However, in other embodiments, some or all of the inner duct portion 71 and the outer duct portion 72 may be formed by members different from the heat sink 10 and the front cover 60. In this case, for example, the heat sink 10 may have a configuration in which the inner duct portion 71 and the outer duct portion 72 are not formed at all.
　内側ダクト部７１は、下端がファン５０に連通し、上端が光源２２に向けて開口する。内側ダクト部７１は、側面視で（左右方向に視て）、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。すなわち、内側ダクト部７１は、側面視で、下方から上方に向かって細くなる（窄まる）テーパ状の形態を有する。本実施形態では、内側ダクト部７１は、上下方向の全体にわたってテーパを有するが、他の実施形態では、上下方向の一部分だけにわたってテーパを有してもよい。以下では、内側ダクト部７１における上端側の開口部を、「内側ダクト部７１の出口開口部７１１」とも称する。 The inner duct portion 71 has a lower end communicating with the fan 50 and an upper end opening toward the light source 22. The inner duct portion 71 has a tapered shape in which the flow velocity at the upper end is higher than that at the lower end side when viewed from the side (when viewed in the left-right direction). That is, the inner duct portion 71 has a tapered shape that narrows (constricts) from the lower side to the upper side in a side view. In the present embodiment, the inner duct portion 71 has a taper over the entire vertical direction, but in other embodiments, it may have a taper over only a part of the vertical direction. Below, the opening on the upper end side of the inner duct portion 71 is also referred to as the “outlet opening portion 711 of the inner duct portion 71”.
　また、本実施形態では、内側ダクト部７１は、更に、正面視でも（前後方向に視ても）、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。すなわち、内側ダクト部７１の出口開口部７１１の幅ｄ２と、入口開口部の幅ｄ０（図４参照）は、ｄ０＞ｄ２である。なお、内側ダクト部７１の出口開口部７１１の幅ｄ２は、複合光学レンズ３１の入射面３１Ｂのサイズに応じて決定されてよい。 Further, in the present embodiment, the inner duct portion 71 further has a tapered shape such that the flow velocity at the upper end is higher than at the lower end side even when viewed from the front (when viewed in the front-back direction). That is, the width d2 of the outlet opening 711 of the inner duct portion 71 and the width d0 of the inlet opening (see FIG. 4) are d0>d2. The width d2 of the outlet opening 711 of the inner duct portion 71 may be determined according to the size of the entrance surface 31B of the complex optical lens 31.
　このようにして、本実施形態では、内側ダクト部７１は、上側が細くなるテーパ状の形態を有するので、ファン５０からの空気の流れの流速を高めることができ、流速が高められた空気を出口開口部７１１から光源装置２０へと流入させることができる。 In this way, in the present embodiment, the inner duct portion 71 has a tapered shape in which the upper side is narrowed, so that the flow velocity of the air flow from the fan 50 can be increased, and the air whose flow velocity has been increased can be increased. It can flow into the light source device 20 through the outlet opening 711.
　ただし、別の実施形態では、内側ダクト部７１は、正面視及び側面視のいずれか一方でのみで、又は他の方向視のみで、上側が細くなるテーパ状の形態を有してもよい。 However, in another embodiment, the inner duct portion 71 may have a tapered shape in which the upper side becomes thinner only in one of the front view and the side view or only in the other direction.
　なお、本実施形態では、内側ダクト部７１は、上述のように、１つの光源装置２０に対して、１つ設けられるが、他の実施形態では、内側ダクト部７１は、１つの光源装置２０に対して、複数個設けられてもよい。 In this embodiment, one inner duct part 71 is provided for one light source device 20 as described above, but in other embodiments, the inner duct part 71 is one light source device 20. However, a plurality of them may be provided.
　内側ダクト部７１は、好ましくは、光源２２の近傍に出口開口部７１１を有するように構成・配置される。例えば内側ダクト部７１は、光学制御部材３０の入射面３１Ｂの下端付近まで延在する。この場合、内側ダクト部７１の出口開口部７１１から流出する空気を、効率的に光学制御部材３０と光源２２との間の隙間９０（図５参照）に流すことができ、レンズ熱保護機能を高めることができる。なお、ここでは、隙間９０とは、便宜上、光学制御部材３０の入射面３１Ｂの各点と光源２２の発光中心との間を結ぶ各線分を内包する空間として定義する。 The inner duct part 71 is preferably constructed and arranged so as to have an outlet opening 711 in the vicinity of the light source 22. For example, the inner duct portion 71 extends near the lower end of the entrance surface 31B of the optical control member 30. In this case, the air flowing out from the outlet opening 711 of the inner duct portion 71 can efficiently flow into the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22, and the lens heat protection function can be achieved. Can be increased. Note that, here, the gap 90 is defined as a space that includes each line segment that connects each point of the incident surface 31B of the optical control member 30 and the light emission center of the light source 22 for convenience.
　また、内側ダクト部７１は、好ましくは、出口開口部７１１が、光学制御部材３０と光源２２との間の隙間９０（図５参照）に向くように配置される。すなわち、内側ダクト部７１内を流れる空気の流れ方向（主要な流れ方向）に視て、出口開口部７１１は、光学制御部材３０と光源２２との間の隙間９０（図５参照）に対して、少なくとも部分的に重なる位置に配置される。この場合も、内側ダクト部７１の出口開口部７１１から流出する空気を、効率的に光学制御部材３０と光源２２との間の隙間９０（図５参照）に流すことができ、レンズ熱保護機能を高めることができる。 The inner duct portion 71 is preferably arranged so that the outlet opening 711 faces the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22. That is, when viewed in the flow direction (main flow direction) of the air flowing inside the inner duct portion 71, the outlet opening 711 is positioned with respect to the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22. , At least partially overlapping. Also in this case, the air flowing out from the outlet opening 711 of the inner duct portion 71 can efficiently flow into the gap 90 (see FIG. 5) between the optical control member 30 and the light source 22, and the lens heat protection function can be achieved. Can be increased.
　外側ダクト部７２は、ファン５０と締結部材ＢＴ（取付部１１１）との間に延在する。外側ダクト部７２は、側面視で（左右方向に視て）、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。本実施形態では、外側ダクト部７２は、上下方向の全体にわたってテーパを有するが、他の実施形態では、上下方向の一部分だけにわたってテーパを有してもよい。 The outer duct portion 72 extends between the fan 50 and the fastening member BT (mounting portion 111). The outer duct portion 72 has a tapered shape in which the flow velocity at the upper end is higher than that at the lower end side when viewed from the side (when viewed in the left-right direction). In the present embodiment, the outer duct portion 72 has a taper over the entire vertical direction, but in other embodiments, the outer duct portion 72 may have a taper over only a part of the vertical direction.
　また、本実施形態では、外側ダクト部７２は、更に、正面視でも（前後方向に視ても）、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。すなわち、外側ダクト部７２の下流側の幅ｄ３と、入口開口部の幅ｄ４（図４参照）は、ｄ４＞ｄ３である。 Further, in the present embodiment, the outer duct portion 72 further has a tapered shape such that the flow velocity at the upper end is higher than at the lower end side even when viewed from the front (when viewed in the front-back direction). That is, the downstream side width d3 of the outer duct portion 72 and the inlet opening width d4 (see FIG. 4) are d4>d3.
　このようにして、本実施形態では、外側ダクト部７２は、上側が細くなるテーパ状の形態を有するので、ファン５０からの空気の流れの流速を高めることができ、流速が高められた空気を締結部材ＢＴ（取付部１１１）に当てることができる。 In this way, in the present embodiment, the outer duct portion 72 has a tapered shape in which the upper side is narrowed, so that the flow velocity of the air from the fan 50 can be increased, and the air whose flow velocity has been increased can be increased. It can be applied to the fastening member BT (mounting portion 111).
　ただし、別の実施形態では、外側ダクト部７２は、正面視及び側面視のいずれか一方でのみで、又は他の方向視のみで、上側が細くなるテーパ状の形態を有してもよい。 However, in another embodiment, the outer duct portion 72 may have a tapered shape in which the upper side becomes thinner only in one of a front view and a side view or only in another direction.
（作用・動作等）
　次に、図５を続けて参照し、かつ、図６を参照して、本実施形態によるファン５０及びダクト７０の作用について説明する。 (Action, motion, etc.)
Next, with reference to FIG. 5 continuously and with reference to FIG. 6, the operation of the fan 50 and the duct 70 according to the present embodiment will be described.
　図６は、図４のラインＢ－Ｂに沿った本実施形態の灯具ユニット１の縦断面図である。 FIG. 6 is a vertical cross-sectional view of the lamp unit 1 of the present embodiment taken along the line BB of FIG.
　まず、図５を参照するに、ファン５０が作動すると、矢印Ｒ１で示すように、内側ダクト部７１を介して上方へと空気が流れる。内側ダクト部７１は、上述のように、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。従って、内側ダクト部７１を流れる空気は、上方に向かうほど流速が高くなる。このようにして流速が速められた空気は、出口開口部７１１から上方へと流出し、矢印Ｒ２に示すように、カバー４０と光源装置２０との間の送風流路部分を通過する。本実施形態では、カバー４０と光源装置２０との間の送風流路部分も上側が細くなるテーパ状であるので、空気の流れは、カバー４０と光源装置２０との間の送風流路部分においても速められる。その後、このようにして流速が速められた空気は、光学制御部材３０と光源２２との間の隙間９０へと流入する。なお、この際、光源２２を含む光源装置２０自体も直接的に空気（風）が当たることで冷却される。 First, referring to FIG. 5, when the fan 50 operates, air flows upward through the inner duct portion 71 as indicated by an arrow R1. As described above, the inner duct portion 71 has a tapered shape in which the flow velocity is higher at the upper end than at the lower end. Therefore, the air flowing through the inner duct portion 71 has a higher flow velocity as it goes upward. The air whose flow velocity has been increased in this way flows out upward from the outlet opening 711 and passes through the blower flow passage portion between the cover 40 and the light source device 20 as shown by an arrow R2. In the present embodiment, the air flow passage portion between the cover 40 and the light source device 20 also has a tapered shape in which the upper side is narrowed, so that the air flow is generated in the air flow passage portion between the cover 40 and the light source device 20. Can also be accelerated. After that, the air whose flow velocity has been increased in this way flows into the gap 90 between the optical control member 30 and the light source 22. At this time, the light source device 20 itself including the light source 22 is also cooled by direct contact with air (wind).
　矢印Ｒ３に示すように、光学制御部材３０と光源２２との間の隙間９０に空気が流れると、隙間９０に溜まりうる熱が、空気とともに隙間９０の外へと（隙間９０の上側へと）移動される（矢印Ｒ４参照）。これにより、レンズ熱保護機能が実現される。 As shown by an arrow R3, when air flows through the gap 90 between the optical control member 30 and the light source 22, heat that may be accumulated in the gap 90 moves to the outside of the gap 90 together with the air (to the upper side of the gap 90). It is moved (see arrow R4). Thereby, the lens heat protection function is realized.
　また、図６を参照するに、ファン５０が作動すると、内側ダクト部７１の場合と同様に、矢印Ｒ５で示すように、外側ダクト部７２を介して上方へと空気が流れる。外側ダクト部７２は、上述のように、下端側よりも上端の方が流速が高くなるようなテーパ状の形態を有する。従って、外側ダクト部７２を流れる空気は、上方に向かうほど流速が高くなる。このようにして流速が速められた空気は、取付部１１１まわりを通り、取付部１１１まわりを冷却し、外部へと流出する（矢印Ｒ６参照）。これにより、レンズ熱保護機能が実現される。 Further, referring to FIG. 6, when the fan 50 operates, as in the case of the inner duct portion 71, air flows upward through the outer duct portion 72 as indicated by arrow R5. As described above, the outer duct portion 72 has a tapered shape in which the flow velocity is higher at the upper end than at the lower end side. Therefore, the air flowing through the outer duct portion 72 has a higher flow velocity as it goes upward. The air whose flow velocity has been increased in this way passes around the mounting portion 111, cools around the mounting portion 111, and flows out to the outside (see arrow R6). Thereby, the lens heat protection function is realized.
　ところで、灯具ユニット１の小型化を図るためには、光学系の小型化を図るべくＬＥＤよりも面積の小さい蛍光体をもつＬＤ光源（レーザー光源）とするとき、光源光束の損失を最小限に抑えるため、ＬＤ光源（レーザー光源）と光学部品の距離が、ＬＥＤのそれより近いレイアウトとなる。すなわち、本実施形態でいう光学制御部材３０と光源２２との間の距離Δ１（光源２２の光軸方向での離間距離、図５参照）は、ＬＤ光源（レーザー光源）を用いる方が、ＬＥＤを用いる場合よりも短くなる傾向となる。例えば、ＬＤ光源（レーザー光源）を用いる場合、光学制御部材３０と光源２２との間の隙間は、０．３ｍｍ～５ｍｍ程度となる傾向がある。 By the way, in order to miniaturize the lamp unit 1, when an LD light source (laser light source) having a phosphor having an area smaller than that of an LED is used in order to miniaturize the optical system, the loss of light source luminous flux is minimized. In order to suppress it, the distance between the LD light source (laser light source) and the optical component becomes a layout closer to that of the LED. That is, the distance Δ1 between the optical control member 30 and the light source 22 in the present embodiment (distance between the light sources 22 in the optical axis direction, see FIG. 5) is greater when the LD light source (laser light source) is used. Will tend to be shorter than when using. For example, when using an LD light source (laser light source), the gap between the optical control member 30 and the light source 22 tends to be about 0.3 mm to 5 mm.
　光学制御部材３０と光源２２との間の距離Δ１が小さくなると、光源２２による光学制御部材３０への悪影響（例えば光学制御部材３０の溶損）が生じやすくなる。具体的には、光源２２の発する光エネルギと、光源２２を熱源とする熱伝達による空間温度上昇（すなわち隙間９０における温度上昇）が顕著となる。この場合、隙間９０の温度が、光学制御部材３０の入射面３１Ｂが耐熱温度を越えると、光学制御部材３０の溶損が生じるおそれがある。 If the distance Δ1 between the optical control member 30 and the light source 22 becomes small, the light source 22 is likely to have an adverse effect on the optical control member 30 (for example, melting damage of the optical control member 30). Specifically, the light energy emitted from the light source 22 and the space temperature increase (that is, the temperature increase in the gap 90) due to the heat transfer using the light source 22 as the heat source are significant. In this case, if the temperature of the gap 90 exceeds the heat resistant temperature of the incident surface 31B of the optical control member 30, the optical control member 30 may be melted and damaged.
　この点、本実施形態によれば、上述のように、光学制御部材３０と光源２２との間の隙間９０に向けて、ファン５０から内側ダクト部７１を介して空気が強制的に流されるので、隙間９０における温度上昇を低減できる。この結果、隙間９０の温度が、光学制御部材３０の入射面３１Ｂが耐熱温度を越える可能性を低減できる。よって、本実施形態によれば、光学制御部材３０と光源２２との間の距離Δ１が小さい場合でも、光学制御部材３０の溶損が生じる可能性を低減できる。 In this respect, according to the present embodiment, as described above, the air is forced to flow from the fan 50 through the inner duct portion 71 toward the gap 90 between the optical control member 30 and the light source 22. The temperature rise in the gap 90 can be reduced. As a result, it is possible to reduce the possibility that the temperature of the gap 90 exceeds the heat resistant temperature of the incident surface 31B of the optical control member 30. Therefore, according to the present embodiment, even if the distance Δ1 between the optical control member 30 and the light source 22 is small, it is possible to reduce the possibility of melting damage of the optical control member 30.
　また、本実施形態によれば、内側ダクト部７１が出口開口部７１１側で流速が高くなるようなテーパ状の形態を有するので、光学制御部材３０と光源２２との間の隙間９０を通る空気の流速を高めることができる。光学制御部材３０と光源２２との間の隙間９０を通る空気の流速が高いほど、隙間９０における温度上昇を効率的に低減できる。従って、本実施形態によれば、例えばファン５０の出力を過大とすることなく、隙間９０における温度上昇を適切に低減できる。 Further, according to the present embodiment, since the inner duct portion 71 has a tapered shape in which the flow velocity is high on the side of the outlet opening 711, the air passing through the gap 90 between the optical control member 30 and the light source 22. The flow rate of can be increased. The higher the flow velocity of the air passing through the gap 90 between the optical control member 30 and the light source 22, the more efficiently the temperature rise in the gap 90 can be reduced. Therefore, according to the present embodiment, for example, the temperature rise in the gap 90 can be appropriately reduced without making the output of the fan 50 excessive.
　ところで、内側ダクト部７１の出口開口部７１１から流出する際の空気の流速が比較的高い場合でも、光学制御部材３０と光源２２との間の隙間９０に至る前に、流路の急拡大や急縮小等、抵抗等による損失があると、光学制御部材３０と光源２２との間の隙間９０を通る空気の流速を効率的に高めることが難しい。この観点から、隙間９０と出口開口部７１１との間での空気の流れの損失を低減するために、上下方向で隙間９０と出口開口部７１１との間に、閉塞された流路（送風流路部分）が形成されることが望ましい。この点、本実施形態では、上述のように、カバー４０とフロントカバー６０とは上下方向で近接又は当接するので、上下方向で隙間９０と出口開口部７１１との間に、実質的に閉塞された流路（送風流路部分）が形成される
　また、内側ダクト部７１の出口開口部７１１の幅Δ３は、光学制御部材３０と光源２２との間の距離Δ１よりもわずかに大きい場合には、内側ダクト部７１の出口開口部７１１での流速よりも、光学制御部材３０と光源２２との間の隙間９０を通る空気の流速を速くすることが可能となるので、隙間９０における温度上昇を効率的に低減できる。ただし、内側ダクト部７１の出口開口部７１１の幅Δ３は、光学制御部材３０と光源２２との間の距離Δ１よりもわずかに大きい場合であっても、上述のように、空気の流れ方向で、内側ダクト部７１の出口開口部７１１と隙間９０との間の損失に起因して、内側ダクト部７１の出口開口部７１１での流速よりも、光学制御部材３０と光源２２との間の隙間９０を通る空気の流速が早くならない場合もありうる。 By the way, even when the flow velocity of the air when flowing out from the outlet opening 711 of the inner duct portion 71 is relatively high, the flow path is suddenly expanded or expanded before reaching the gap 90 between the optical control member 30 and the light source 22. If there is a loss due to resistance or the like due to sudden reduction, it is difficult to efficiently increase the flow velocity of air passing through the gap 90 between the optical control member 30 and the light source 22. From this point of view, in order to reduce the loss of the air flow between the gap 90 and the outlet opening 711, a closed flow path (blast flow) is provided between the gap 90 and the outlet opening 711 in the vertical direction. It is desirable that a road portion) be formed. In this respect, in the present embodiment, as described above, the cover 40 and the front cover 60 are close to or in contact with each other in the vertical direction, so that the gap 90 and the outlet opening 711 are substantially closed in the vertical direction. When the width Δ3 of the outlet opening 711 of the inner duct portion 71 is slightly larger than the distance Δ1 between the optical control member 30 and the light source 22, Since the flow velocity of the air passing through the gap 90 between the optical control member 30 and the light source 22 can be made faster than the flow velocity at the outlet opening 711 of the inner duct portion 71, the temperature rise in the gap 90 can be prevented. It can be reduced efficiently. However, even if the width Δ3 of the outlet opening 711 of the inner duct portion 71 is slightly larger than the distance Δ1 between the optical control member 30 and the light source 22, as described above, in the air flow direction. Due to the loss between the outlet opening 711 of the inner duct portion 71 and the gap 90, the gap between the optical control member 30 and the light source 22 is faster than the flow velocity at the outlet opening 711 of the inner duct portion 71. In some cases, the flow rate of air through 90 may not be fast.
　本実施形態では、カバー４０の上端位置での流路（送風流路部分）の幅（光源２２の前面基準）をΔ２とすると、光学制御部材３０と光源２２との間の距離Δ１と、内側ダクト部７１の出口開口部７１１の幅Δ３との関係は、Δ１＜Δ２＜Δ３である。ただし、別の実施形態では、Δ１＜Δ２≒Δ３であってもよいし、Δ１≒Δ２＜Δ３であってもよいし、Δ１≒Δ２≒Δ３であってよい。なお、Δ１≒Δ２≒Δ３の場合であっても、内側ダクト部７１が出口開口部７１１側で流速が高くなるようなテーパ状の形態を有するので、光学制御部材３０と光源２２との間の隙間９０を通る空気の流速を効率的に高めることができる。 In the present embodiment, assuming that the width of the flow path (air flow path portion) at the upper end position of the cover 40 (reference of the front surface of the light source 22) is Δ2, the distance Δ1 between the optical control member 30 and the light source 22 and the inside The relationship with the width Δ3 of the outlet opening 711 of the duct portion 71 is Δ1<Δ2<Δ3. However, in another embodiment, it may be Δ1<Δ2≈Δ3, Δ1≈Δ2<Δ3, or Δ1≈Δ2≈Δ3. Even when Δ1≈Δ2≈Δ3, since the inner duct portion 71 has a tapered shape in which the flow velocity is high on the side of the outlet opening 711, the space between the optical control member 30 and the light source 22 is reduced. The flow velocity of the air passing through the gap 90 can be efficiently increased.
　また、光学制御部材３０と光源２２との間の距離Δ１が小さくなると、ヒートシンク１０等のような、光学制御部材３０と光源２２の間に介する部品を伝う熱伝導に起因して、光学制御部材３０の取り付け部である固定部３２（すなわちネジ孔３２ＢＢ付近）が材料の耐熱温度を超え、溶損するおそれがある。 In addition, when the distance Δ1 between the optical control member 30 and the light source 22 becomes small, the optical control member is caused by heat conduction through a component such as the heat sink 10 interposed between the optical control member 30 and the light source 22. The fixing portion 32 (that is, the vicinity of the screw hole 32BB) that is the mounting portion of 30 may exceed the heat resistant temperature of the material and may be melted.
　この点、本実施形態によれば、上述のように、取付部１１１に向けて開口する外側ダクト部７２が設けられる。従って、光学制御部材３０の固定部３２は、ファン５０により隙間９０に流される空気によって冷却できる。これにより、光学制御部材３０の固定部３２が溶損する可能性も低減できる。 In this regard, according to the present embodiment, as described above, the outer duct portion 72 that opens toward the attachment portion 111 is provided. Therefore, the fixed portion 32 of the optical control member 30 can be cooled by the air flowed into the gap 90 by the fan 50. This can reduce the possibility that the fixing portion 32 of the optical control member 30 will be melted.
　以上、各実施形態について詳述したが、特定の実施形態に限定されるものではなく、特許請求の範囲に記載された範囲内において、種々の変形及び変更が可能である。また、前述した実施形態の構成要素を全部又は複数を組み合わせることも可能である。 Although the respective embodiments have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the claims. It is also possible to combine all or a plurality of the constituent elements of the above-described embodiments.
　例えば、上述した実施形態では、外側ダクト部７２が設けられるが、外側ダクト部７２は省略されてもよい。 For example, although the outer duct portion 72 is provided in the above-described embodiment, the outer duct portion 72 may be omitted.
　また、上述した実施形態では、ヒートシンク１０や光学制御部材３０等は、左右方向（車両幅方向）の中心に関して左右対称な構成を有するが、左右で若干の相違を有してもよいし、完全に非対称な構成を有してもよい。 Further, in the above-described embodiment, the heat sink 10, the optical control member 30, and the like have a bilaterally symmetrical configuration with respect to the center in the left-right direction (vehicle width direction), but there may be some difference between the left and right, or a complete difference. It may have an asymmetrical structure.
　また、上述した実施形態では、カバー４０の下部が、内側ダクト部７１から隙間９０までの間の送風流路の一部を形成するが、フロントカバー６０の上端を上側に延長することで、カバー４０の下部の機能が実現されてもよい。この場合、位置決め孔４２Ａ（位置決め孔３２ＢＡ及び位置決め孔２４Ａ）の位置は、他の位置（例えばカバー４０の上部等）に設定されてもよい。 Further, in the above-described embodiment, the lower portion of the cover 40 forms a part of the air flow passage between the inner duct portion 71 and the gap 90, but by extending the upper end of the front cover 60 upward, The functions of the lower part of 40 may be realized. In this case, the positions of the positioning holes 42A (the positioning holes 32BA and the positioning holes 24A) may be set to other positions (for example, the upper portion of the cover 40).
１　灯具ユニット
１０　ヒートシンク
１１　ベース部
１１Ａ　位置決めピン
１１Ｂ　ネジ螺合孔
１２　放熱フィン
２０　光源装置
２１　熱伝達部材
２２　光源
２２Ａ　基板
２２Ｂ　発光領域
２３　接続部
２３Ａ　開口部
２３Ｂ　コネクタ接続部
２４Ａ　位置決め孔
２４Ｂ　ネジ孔
３０　光学制御部材
３１　複合光学レンズ
３１Ｂ　入射面
３２　固定部
３２Ａ　脚部
３２Ｂ　基部
３２ＢＡ　位置決め孔
３２ＢＢ　ネジ孔
４０　カバー
４１　覆い部
４１Ａ　切欠き部
４２　フランジ部
４２Ａ　位置決め孔
４２Ｂ　ネジ孔
７０　ダクト
７１　内側ダクト部
７１１　出口開口部
７２　外側ダクト部
９０　隙間
Ｎ　ネジ
ＢＴ　締結部材
１０１Ｌ、１０１Ｒ　車両用の前照灯
１０２　車両 1 Lamp Unit 10 Heat Sink 11 Base 11A Positioning Pin 11B Screwing Hole 12 Radiating Fin 20 Light Source Device 21 Heat Transfer Member 22 Light Source 22A Substrate 22B Light Emitting Area 23 Connection 23A Opening 23B Connector Connection 24A Positioning Hole 24B Screw Hole 30 Optical control member 31 Complex optical lens 31B Incident surface 32 Fixing portion 32A Leg portion 32B Base portion 32BA Positioning hole 32BB Screw hole 40 Cover 41 Covering portion 41A Notch portion 42 Flange portion 42A Positioning hole 42B Screw hole 70 Duct 71 Inner duct portion 711 Exit Opening 72 Outer duct 90 Gap N Screw BT Fastening members 101L, 101R Vehicle headlight 102 Vehicle

Claims (5)

  1. 　レーザ光源と、
    　前記レーザ光源からの光の入射面を有する光学部品と、
    　送風機と、
    　一端が前記送風機に連通し、他端が前記レーザ光源に向けて開口する第１ダクト部とを備え、
    　前記第１ダクト部は、前記一端側から前記他端側に向けて窄まるテーパ状の形態を有する、車両用灯具。     A laser light source,
    An optical component having an incident surface of light from the laser light source,
    A blower,
    One end communicates with the blower, and the other end has a first duct portion that opens toward the laser light source,
    The vehicle lamp according to claim 1, wherein the first duct portion has a tapered shape that narrows from the one end side toward the other end side.
  2. 　前記レーザ光源の光軸方向において、前記第１ダクト部の前記他端側の開口部の幅は、前記レーザ光源と前記光学部品との間の離間距離よりも大きい、請求項１に記載の車両用灯具。 The vehicle according to claim 1, wherein a width of the opening on the other end side of the first duct portion is larger than a separation distance between the laser light source and the optical component in the optical axis direction of the laser light source. Lighting equipment.
  3. 　フィンを備え、溝部が形成される放熱部材と、
    　前記溝部を覆うカバー部材を更に備え、
    　前記第１ダクト部は、前記溝部と前記カバー部材とにより形成される、請求項２に記載の車両用灯具。     A heat dissipating member having fins and in which a groove is formed;
    Further comprising a cover member for covering the groove,
    The vehicle lamp according to claim 2, wherein the first duct portion is formed by the groove portion and the cover member.
  4. 　前記光学部品を前記放熱部材に取り付ける固定具と、
    　前記送風機と前記固定具との間に延在する第２ダクト部とを更に備える、請求項１に記載の車両用灯具。     A fixture for attaching the optical component to the heat dissipation member,
    The vehicle lamp according to claim 1, further comprising a second duct portion extending between the blower and the fixture.
  5. 　前記第１ダクト部及び前記第２ダクト部の少なくともいずれか一方は、少なくとも一部の区間において、前記レーザ光源の光軸に沿った方向に視て、前記一端側から前記他端側に向かって幅が狭くなる、請求項４に記載の車両用灯具。 At least one of the first duct part and the second duct part is viewed from a direction along the optical axis of the laser light source toward the other end side in at least a part of the section. The vehicular lamp according to claim 4, which has a narrow width.
PCT/JP2019/042397 2018-12-13 2019-10-29 Vehicle lamp WO2020121669A1 (en)

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JP7343960B2 (en) 2016-09-30 2023-09-13 積水化学工業株式会社 Air conditioning drain pipe and method for manufacturing air conditioning drain pipe
JP7271078B2 (en) 2016-09-30 2023-05-11 積水化学工業株式会社 Air conditioning drain pipe
US11994267B2 (en) 2020-07-06 2024-05-28 Koito Manufacturing Co., Ltd. Vehicle lamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004241349A (en) * 2003-02-10 2004-08-26 Koito Mfg Co Ltd Vehicular headlight and optical unit
JP2012038678A (en) * 2010-08-11 2012-02-23 Stanley Electric Co Ltd Lighting system and its heat sink
JP2017062885A (en) * 2015-09-24 2017-03-30 スタンレー電気株式会社 Vehicular lighting fixture
US20180266646A1 (en) * 2017-03-16 2018-09-20 Valeo Vision Optical module including a heat sink equipped with a vent

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004241349A (en) * 2003-02-10 2004-08-26 Koito Mfg Co Ltd Vehicular headlight and optical unit
JP2012038678A (en) * 2010-08-11 2012-02-23 Stanley Electric Co Ltd Lighting system and its heat sink
JP2017062885A (en) * 2015-09-24 2017-03-30 スタンレー電気株式会社 Vehicular lighting fixture
US20180266646A1 (en) * 2017-03-16 2018-09-20 Valeo Vision Optical module including a heat sink equipped with a vent

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