WO2023063147A1 - Vehicular lamp - Google Patents

Vehicular lamp Download PDF

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Publication number
WO2023063147A1
WO2023063147A1 PCT/JP2022/036985 JP2022036985W WO2023063147A1 WO 2023063147 A1 WO2023063147 A1 WO 2023063147A1 JP 2022036985 W JP2022036985 W JP 2022036985W WO 2023063147 A1 WO2023063147 A1 WO 2023063147A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
light source
light
substrate
rib
Prior art date
Application number
PCT/JP2022/036985
Other languages
French (fr)
Japanese (ja)
Inventor
貢 大石
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Publication of WO2023063147A1 publication Critical patent/WO2023063147A1/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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • 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
    • F21V29/70—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
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/10—Position lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/35—Brake lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/55—Daytime running lights [DRL]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2105/00—Combinations of lighting devices covered by codes F21W2102/00 – F21W2104/00

Definitions

  • the present invention relates to a technical field of a vehicle lamp having an optical component into which light emitted from a light source is incident and a heat sink that releases heat generated when the light source is turned on.
  • a light source that emits light and optical components such as a light guide into which the light emitted from the light source is incident are arranged in a lamp outer casing composed of a cover and a lamp housing.
  • a lamp outer casing composed of a cover and a lamp housing.
  • the emitted light is controlled by an optical component and directed to the outside (see, for example, Patent Document 1).
  • a substrate is attached to a heat sink having heat dissipation fins, the end of the light guide on the light source side is covered with a cover member (light shielding cover), and the incident surface of the light guide is covered with a light shielding cover. is positioned opposite the light source mounted on the substrate.
  • a cover member light shielding cover
  • the emitted light is incident from the incident surface, guided in a predetermined direction by the light guide, and emitted from the emission surface of the light guide. , is transmitted through the cover and irradiated to the outside.
  • the light is emitted using an optical component such as a light guide, the light is emitted under the control of the optical component, making it possible to irradiate the light in a desired direction over a wide area.
  • the ends of the optical components become hot, the ends are likely to be distorted, affecting the light distribution pattern formed by the light emitted from the light source and reducing the brightness of the light emitted from the optical components. may decline.
  • an object of the vehicle lamp of the present invention is to suppress the temperature rise of the end portion of the optical component on the light source side to ensure an appropriate emission state from the optical component.
  • a vehicle lamp includes a substrate on which a light source is mounted, a heat sink having a substrate mounting portion to which the substrate is mounted, and heat radiation fins projecting from the substrate mounting portion, and light emitted from the light source.
  • the heat generated when the light source is turned on is transmitted from the board mounting portion to the heat radiating fins, and is also transmitted from the heat absorbing rib protruding toward the board side to the heat radiating fins via the board mounting portion and released from the heat radiating fins.
  • the heat generated when the light source is turned on is transmitted from the substrate mounting portion to the heat radiating fins, is transmitted from the heat absorbing rib projecting toward the substrate side to the heat radiating fins via the substrate mounting portion, and is released from the heat radiating fins. Therefore, the heat generated when the light source is turned on is less likely to be transmitted to the end of the optical component on the light source side, suppressing the temperature rise of the end of the optical component on the light source side and ensuring an appropriate light output from the optical component. can do.
  • FIG. 4 is an enlarged cross-sectional view showing a state in which a light guide is inserted into a cover member attached to a heat sink and the end of the light guide is positioned facing a light source;
  • FIG. 4 is a perspective view showing a state in which an end of a light guide is positioned facing a light source;
  • FIG. 4 is an exploded perspective view showing a heat sink, a substrate, a gasket, and a cover member; It is a perspective view showing a heat sink.
  • FIG. 4 is a front view showing the positional relationship between heat-absorbing ribs and light sources;
  • FIG. 4 is a perspective view showing a state in which a substrate and a cover member are attached to a heat sink;
  • the vehicle lamp 1 is, for example, a so-called combination lamp that is attached to both left and right ends of the front end of the vehicle body and functions as a vehicle headlamp and a vehicle marker lamp.
  • the vehicle lamp 1 may be attached to other parts of the vehicle other than the front end of the vehicle, and has a single function as a vehicle indicator light such as a tail lamp, a stop lamp, and a turn signal lamp. It can be widely applied as a lamp or a combination lamp with multiple functions.
  • the front, back, top, bottom, left, and right directions will be described with the direction of light emitted from the vehicle lamp 1 being the front.
  • the front, rear, up, down, left, and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.
  • a vehicle lamp 1 includes a lamp housing 2 having an opening at its front end and a cover 3 closing the opening of the lamp housing 2 (see FIG. 1).
  • a lamp housing 4 is formed by the lamp housing 2 and the cover 3 , and an internal space of the lamp housing 4 is formed as a lamp chamber 5 .
  • Mounting holes 2a, 2a are formed in the lamp housing 2 so as to be separated from each other in the left and right direction.
  • a placement hole 2b is formed in the lamp housing 2 at the outer end portion in the left-right direction with respect to the vehicle.
  • a first lamp unit and a second lamp unit (not shown) are inserted into the mounting holes 2a, 2a of the lamp housing 2, respectively.
  • the first lamp unit is a headlamp unit for high beam
  • the second lamp unit is a headlamp unit for low beam.
  • An extension (bezel) 6 is arranged in the lamp chamber 5 .
  • the extension 6 has an outer shape substantially the same as that of the cover 3 and a size smaller than that of the cover 3.
  • - ⁇ Lens arrangement holes 6a, 6a are formed in the extension 6 so as to be separated from each other in the left and right direction.
  • the projection lens of the first lamp unit and the projection lens of the second lamp unit are inserted and arranged in the lens arrangement holes 6a, 6a, respectively.
  • a unit placement hole 6b is formed in the extension 6 in a portion extending from the side to the bottom of the lens placement holes 6a, 6a.
  • a light guide unit 7 is attached to the rear surface of the extension 6 .
  • the light guide unit 7 is composed of a reflector 8 , a control lens 9 and a light guide 10 .
  • the reflector 8 has an outer shape that is substantially the same as the unit arrangement hole 6b of the extension 6, and is one size larger than the unit arrangement hole 6b.
  • the reflector 8 includes a holding portion 8a extending in a predetermined direction, a plurality of mounting projections 8b projecting outward from the holding portion 8a, mounting portions 8c continuously provided at both ends of the holding portion 8a, 8c.
  • the reflector 8 is provided with attached portions 8d, 8d at both ends in the longitudinal direction.
  • An insertion hole 8e is formed in the reflector 8 at a position continuous with one mounting portion 8c.
  • the surface of the holding portion 8a is vapor-deposited with aluminum or the like so that the holding portion 8a has a high light reflecting performance.
  • the control lens 9 is formed in substantially the same shape and size as the reflector 8, and has a light control portion 9a extending in a predetermined direction and a plurality of mounting projections 9b projecting outward from the light control portion 9a. there is A lens step (not shown) is formed in the light control portion 9a, and the light control portion 9a has a light diffusion function.
  • the light guide 10 is made of a transparent resin material and functions as an optical component into which light emitted from a light source, which will be described later, is incident.
  • other parts such as an inner lens may be provided as optical parts in place of the light guide body 10.
  • the light guide 10 has a light guide portion 11 extending in the same predetermined direction as the holding portion 8 a of the reflector 8 and attachment projections 12 , 12 attached to the reflector 8 .
  • the light guide portion 11 has a reflection step (not shown) on its rear surface, and the front surface of the portion having the reflection step is formed as an emission surface 11a.
  • An outer end portion 13 of the light guide portion 11 with respect to the vehicle is positioned on the rear side of one mounting projection portion 12 .
  • the attachment projections 12 , 12 protrude from a position near one end of the light guide portion 11 and the other end of the light guide portion 11 , respectively.
  • An end surface of the end portion 13 is formed as an incident surface 13a (see FIG. 2).
  • the end portion 13 is provided with abutment projections 13b, 13b projecting outward in the left-right direction, and the abutment projections 13b, 13b are positioned in front of the incident surface 13a (see FIG. 3).
  • the light guide 10 is held by the holding portion 8a by screwing the mounting protrusions 12, 12 to the mounting portions 8c, 8c of the reflector 8, respectively (see FIG. 1).
  • the end portion 13 is inserted through the insertion hole 8e.
  • Attached protrusions 9b, 9b, . . . of the control lens 9 are attached to the attachment protrusions 8b, 8b, .
  • the control lens 9 covers the light guide 10 from the front except for both ends in the longitudinal direction.
  • the light guide unit 7 is configured by attaching the light guide 10 and the control lens 9 to the reflector 8 in this manner.
  • the light guide unit 7 is attached to the extension 6 by screws or the like from the rear side at the attached portions 8d, 8d of the reflector 8. As shown in FIG. In the state where the light guide unit 7 is attached to the extension 6, the control lens 9 is inserted and arranged in the unit arrangement hole 6b.
  • the extension 6 is attached to the cover 3 by screwing or the like from the rear surface side in a state where the light guide unit 7 is attached.
  • a heat sink 14 is attached to the lamp housing 2 from the rear side by screwing or the like. Each part of the heat sink 14 is integrally formed of a metal material such as aluminum having high heat dissipation (see FIGS. 4 and 5).
  • the heat sink 14 has a substrate mounting portion 15 facing in the front-rear direction, radiation fins 16, 16, . . . and an attached plate portion 17 .
  • the front surface of the substrate mounting portion 15 is located forward of the front surface of the mounted plate portion 17, and a frame-shaped portion 18 protruding forward is provided around the substrate mounting portion 15. As shown in FIG.
  • the heat sink 14 is formed with an annular insertion groove 14a opening forward between the board mounting portion 15 and the frame portion 18. As shown in FIG.
  • the heat sink 14 is provided with positioning pins 14b, 14b that protrude forward from the board mounting portion 15 and are spaced apart from each other to the left and right.
  • a screw hole 15a opening forward is formed in the substrate mounting portion 15 between the positioning pins 14b, 14b.
  • the heat sink 14 is provided with first heat-absorbing ribs 19 projecting forward from the board mounting portion 15 .
  • the first heat absorbing rib 19 is positioned immediately above the screw hole 15a.
  • the first heat-absorbing rib 19 is composed of a flat plate-like base portion 20 facing in the vertical direction and extending in the left-right direction, and flat plate-like protrusions 21, 22, 23, and 24 projecting upward from respective portions of the base portion 20. It is The protrusions 21 , 22 , 23 , and 24 are spaced apart from each other in order in the left and right direction. is protruding upward from the other end of the
  • the base portion 20 has a first portion 20a between the projections 21 and 22, a second portion 20b between the projections 22 and 23, and a second portion 20b between the projections 21 and 23. and the protrusion 24 is provided as a third portion 20c.
  • the first heat-absorbing rib 19 is formed with a concave portion 19a opened upward by the projections 21, 22, and the first portion 20a, and is upwardly opened by the projections 22, 23, and the second portion 20b.
  • a concave portion 19b that is open to the outside is formed, and a concave portion 19c that is open upward is formed by the projections 23, 24 and the third portion 20c.
  • the heat sink 14 is provided with a second heat absorbing rib 25 projecting forward from the upper end portion of the board mounting portion 15 .
  • the second heat-absorbing rib 25 is formed in a flat plate-like shape extending in the left-right direction while facing the up-down direction, and is positioned right above the first heat-absorbing rib 19 .
  • the width of the second heat absorption rib 25 in the left-right direction is substantially the same as or slightly smaller than the width of the first heat absorption rib 19 in the left-right direction.
  • the board mounting portion 15, the heat radiating fins 16, the mounted plate portion 17, the frame portion 18, the first heat absorbing rib 19, and the second heat absorbing rib 25 are integrally formed. Therefore, it is possible to reduce the manufacturing cost of the vehicle lamp 1 by reducing the number of parts.
  • An annular gasket 26 made of a rubber material or the like is inserted into the insertion groove 14a of the heat sink 14 .
  • the mounting plate portion 17 is attached to the portion surrounding the placement hole 2b in the lamp housing 2 from behind by screwing or the like.
  • the gasket 26 is pressed against the portion surrounding the placement hole 2b from behind to prevent moisture from entering the interior of the lamp housing 2 through the placement hole 2b.
  • a substrate 27 is attached from the front to the substrate attachment portion 15 of the heat sink 14 (see FIGS. 4 and 6).
  • the substrate 27 is formed in substantially the same shape and size as the substrate mounting portion 15 .
  • Positioning holes 27a, 27a and a screw insertion hole 27b are formed in the substrate 27.
  • the positioning holes 27a, 27a are positioned laterally apart, and the screw insertion hole 27b is positioned between the positioning holes 27a, 27a.
  • the substrate 27 is formed with rib insertion holes 27c through which the first heat absorbing ribs 19 of the heat sink 14 are inserted.
  • three light sources 28 are mounted on the front surface of the substrate 27 above the rib insertion holes 27c so as to be spaced apart from each other to the left and right.
  • the number of light sources 28 mounted on the board 27 is arbitrary, and each mounting position of the light sources 28 on the board 27 is also arbitrary.
  • the light source 28 for example, a light emitting diode (LED) is used.
  • the light source 28 emits light from, for example, a daytime running lamp, a clearance lamp, or a turn signal lamp.
  • a cover member 29 is attached to the board attachment portion 15 of the heat sink 14 from the front (see FIGS. 2, 4 and 7).
  • the cover member 29 is made of, for example, a resin material, and has a positioning portion 30 for positioning the light guide 10 and a coupling portion 31 projecting outward from the outer peripheral portion of the positioning portion 30 .
  • the positioning part 30 is formed in an annular shape, and at least part of the inner peripheral surface is formed as a guide surface 30a, and the guide surface 30a is an inclined surface that displaces inward as it goes rearward.
  • Receiving surfaces 30b, 30b facing forward are formed at positions near the rear end of the positioning portion 30 so as to be separated from each other in the left and right directions.
  • a space inside the guide surface 30a in the positioning portion 30 is formed as a holding hole 30c.
  • the coupling portion 31 protrudes outward from the rear end portion of the outer peripheral portion of the positioning portion 30 .
  • Positioning holes 31a and 31a and a screw insertion hole 31b are formed in the connecting portion 31 below the positioning portion 30.
  • the positioning holes 31a and 31a are spaced apart from each other to the left and right, and the screw insertion hole 31b is located between the positioning holes 31a and 31a. located in between.
  • the substrate 27 and the cover member 29 are attached to the substrate attachment portion 15 by, for example, fastening together.
  • the substrate 27 is positioned with respect to the substrate mounting portion 15 by inserting positioning pins 14b, 14b into the positioning holes 27a, 27a, respectively, and the cover member 29 has positioning pins 14b, 14b inserted into the positioning holes 31a, 31a respectively. As a result, it is positioned with respect to the board 27 positioned with respect to the board mounting portion 15 .
  • the first heat absorbing rib 19 of the heat sink 14 is inserted into the rib insertion hole 27 c from behind, and the first heat absorbing rib 19 is positioned on the front side of the substrate 27 .
  • the second heat absorbing rib 25 of the heat sink 14 is positioned on the front side of the substrate 27 on the upper side of the substrate 27 . Therefore, the first heat absorbing rib 19 and the second heat absorbing rib 25 are positioned below and above the light sources 28, 28, 28, respectively.
  • the mounting screws 50 are inserted through the screw insertion holes 31b and 27b in order, and are screwed into the screw holes 15a to be attached to the substrate attachment portion 15 by fastening together. be done.
  • the first heat absorption rib 19 of the heat sink 14, the second heat absorption rib 25 of the heat sink 14, the light source 28 mounted on the substrate 27, 28 , 28 are covered from the front side by the positioning portion 30 of the cover member 29 , and a space 32 is formed between the substrate 27 and the positioning portion 30 . Therefore, the first heat absorbing rib 19 , the second heat absorbing rib 25 and the light sources 28 , 28 , 28 are positioned in the space 32 .
  • the lamp housing 2 With the heat sink 14 attached, the lamp housing 2 is attached to the cover 3 from the rear side, and the lamp housing 2 and the cover 3 constitute the lamp housing 4 . At this time, the end portion 13 of the light guide 10 is positioned with respect to the light sources 28 , 28 , 28 by the cover member 29 .
  • the end portion 13 is guided by the guide surface 30a of the cover member 29 and is inserted through the holding hole 30c from the front side.
  • the light source 28 is positioned vertically and horizontally by being guided by the guide surface 30a and inserted into the holding hole 30c.
  • the end portion 13 is positioned with respect to the light sources 28, 28, 28 so that the incident surface 13a faces the light sources 28, 28, 28 at a constant distance (FIGS. 2 and 3). reference).
  • the vehicle lamp 1 configured as described above, when light is emitted from the light source 28, the emitted light is incident on the light guide member 10 through the incident surface 13a, guided by the light guide portion 11, and then emitted from the emitting surface 11a. , is transmitted through the cover 3 and radiated to the outside.
  • Heat is generated when the light source 28 is turned on, and part of the generated heat is transmitted from the board mounting portion 15 of the heat sink 14 to the radiation fins 16, 16, 16, . be. Another part of the generated heat is absorbed by the first heat absorbing ribs 19 and the second heat absorbing ribs 25 of the heat sink 14, and the first heat absorbing ribs 19 and the second heat absorbing ribs 25 dissipate the heat from the substrate. It is transmitted to the radiating fins 16, 16, .
  • part of the light that is not incident on the incident surface 13a is in a range ( 6), and the heat contained in the reaching light is absorbed by the projections 21, 22, and the first portion 20a of the base portion 20.
  • Part of the light emitted from the light source 28B positioned in the center in the left-right direction but not incident on the incident surface 13a extends from the protrusion 21 to the protrusion 23 of the first heat-absorbing rib 19.
  • the heat contained in the reaching light is absorbed by the protrusions 21, 22, 23, the first portion 20a, and the second portion 20b.
  • part of the light emitted from the rightmost light source 28C that is not incident on the incident surface 13a extends from the projection 22 to the projection 24 of the first heat absorbing rib 19 ( 6), and the heat contained in the arriving light is absorbed by the protrusions 22, 23, 24, the second portion 20b, and the third portion 20c.
  • the light emitted from the light sources 28 , 28 , 28 in this way reaches the first heat absorbing rib 19 and the heat contained in the light is absorbed by each part of the first heat absorbing rib 19 .
  • the heat generated when the lamps 28, 28 are lit is efficiently absorbed by the heat sink 14, and the heat radiation efficiency from the heat sink 14 can be improved.
  • the first heat absorbing rib 19 is composed of a base portion 20 and protrusions 21, 22, 23, and 24, and is formed in a comb-like shape, and is formed in a shape having a large surface area (heat absorbing area). The amount of heat is large, and a large amount of heat radiation from the heat sink 14 can be ensured.
  • the light sources 28, 28, 28 are turned on, part of the emitted light is directed to each part of the first heat absorbing ribs 19 as described above, so that the heat contained in the light is transferred to the first heat absorbing ribs. There is a possibility that it will flow upward after being temporarily stored in the recesses 19a, 19b, and 19c of 19 . The heat flowing upward is absorbed by the second heat-absorbing ribs 25 positioned above the first heat-absorbing ribs 19 . 16, . . . and emitted from the radiation fins 16, 16, .
  • the measurement was performed by detecting the temperature of the incident surface 13a of the light guide 10 before the light sources 28, 28, 28 were turned on and after the light sources 28, 28, 28 were turned on in an atmosphere of 60 degrees.
  • the temperature rise until reaching the saturation temperature of the incident surface 13a of the heat sink without the first heat absorbing rib 19 and the second heat absorbing rib 25 is 36.8 degrees.
  • the vehicle lamp 1 includes the heat sink 14 having the board mounting portion 15 to which the board 27 is mounted and the heat radiation fins 16 projecting from the board mounting portion 15, and the light emitted from the light source 28. and a cover member 29 covering the end of the light guide 10 on the light source 28 side.
  • a first heat-absorbing rib 19 and a second heat-absorbing rib 25 are provided to absorb heat generated when the lamp 28 is lit.
  • the heat generated when the light source 28 is turned on is transmitted from the board mounting portion 15 to the heat radiation fins 16, and is transmitted from the first heat absorbing rib 19 and the second heat absorbing rib 25 projecting toward the board 27 side to the board mounting portion 15. is transmitted to the heat radiating fins 16 via and emitted from the heat radiating fins 16 .
  • the heat generated when the light source 28 is turned on is less likely to be transmitted to the end portion 13 of the light guide 10 on the light source 28 side, thereby suppressing the temperature rise of the end portion 13 and ensuring an appropriate light emission state from the light guide 10. can be secured.
  • a space 32 in which the light source 28 is positioned is formed between the cover member 29 and the substrate 27 , and the first heat absorbing rib 19 and the second heat absorbing rib 25 are positioned in the space 32 .
  • the light source 28, the first heat absorbing rib 19, and the second heat absorbing rib 25 are positioned in the space 32 formed between the cover member 29 and the substrate 27, the light emitted from the light source 28 into the space 32 is It becomes possible to efficiently absorb the accumulated heat, and it is possible to improve the heat radiation efficiency.
  • the light sources 28 , 28 , 28 are arranged in a predetermined direction with a space therebetween, and the first heat-absorbing rib 19 extends in the direction in which the light sources 28 , 28 , 28 are arranged. Protrusions 21, 22, 23, and 24 protruding from each portion toward the light source 28 are provided.
  • the heat absorption area of the first heat absorption rib 19 is increased, and the amount of heat absorbed when the light source 28 is turned on can be increased to improve the heat radiation efficiency.
  • both ends of the base portion 20 in the longitudinal direction are positioned outside the ends of the plurality of light sources 28 in the arrangement direction.
  • the heat contained in the light is absorbed to further increase the heat absorption amount generated when the light source 28 is turned on, thereby further improving the heat radiation efficiency. can be planned.
  • first heat absorbing rib 19 and the second heat absorbing rib 25 are positioned on opposite sides of the light sources 28 , 28 , 28 .
  • both the first heat-absorbing rib 19 and the second heat-absorbing rib 25 absorb the heat generated when the light source 28 is turned on. It is possible to further improve the heat radiation efficiency.
  • the heat sink 14 is provided with both the first heat absorbing rib 19 and the second heat absorbing rib 25, but in the vehicle lamp 1, the first heat absorbing rib 19 Alternatively, a configuration in which one of the second heat absorption ribs 25 is provided is possible. Also, the heat sink 14 may be provided with three or more heat absorbing ribs.
  • the second heat absorbing rib positioned on the upper side may be formed in a comb-teeth shape like the first heat absorbing rib 19, and the first heat absorbing rib positioned on the lower side may be formed as the second heat absorbing rib. It may be formed in a flat plate like the heat-absorbing ribs 25 .
  • the protrusions are formed in a comb-teeth shape in a direction protruding downward from the base portion.
  • SYMBOLS 1 Vehicle lamp, 10... Light guide (optical member), 14... Heat sink, 15... Substrate attachment part, 16... Radiation fin, 19... First heat absorption rib, 20... Base part, 21... Protrusion, DESCRIPTION OF SYMBOLS 22... Protrusion 23... Protrusion 24... Protrusion 25... Second heat absorption rib 27... Substrate 28... Light source 28A... Light source 28B... Light source 28C... Light source 29... Cover member 32 ...space

Abstract

Provided is a vehicular lamp comprising: a substrate on which a light source is mounted; a heat sink having a substrate attachment part to which the substrate is attached, and heat-dissipating fins protruding from the substrate attachment part; an optical component into which light emitted from the light source enters; and a cover member that covers a light source-side end of the optical component. The heat sink has heat-absorbing ribs protruding from the substrate attachment part toward the substrate to absorb heat generated when the light source is on.

Description

車輌用灯具vehicle lighting
　本発明は、光源から出射される光が入射される光学部品と光源の点灯時に生じる熱を放出するヒートシンクとを有する車輌用灯具についての技術分野に関する。 The present invention relates to a technical field of a vehicle lamp having an optical component into which light emitted from a light source is incident and a heat sink that releases heat generated when the light source is turned on.
　車輌用灯具には、カバーとランプハウジングによって構成された灯具外筐の内部に光を出射する光源と光源から出射される光が入射される導光体等の光学部品とが配置され、光源から出射される光が光学部品によって制御されて外部へ向けて照射されるタイプがある（例えば、特許文献１参照）。 In a vehicle lamp, a light source that emits light and optical components such as a light guide into which the light emitted from the light source is incident are arranged in a lamp outer casing composed of a cover and a lamp housing. There is a type in which the emitted light is controlled by an optical component and directed to the outside (see, for example, Patent Document 1).
　特許文献１に記載された車輌用灯具においては、放熱フィンを有するヒートシンクに基板が取り付けられ、導光体における光源側の端部がカバー部材（遮光カバー）によって覆われ、導光体の入射面が基板に搭載された光源に対向して位置された構成にされている。このような車輌用灯具においては、光源から光が出射されると、出射された光が入射面から入射されて導光体によって所定の方向へ導かれ導光体の出射面から光が出射され、カバーを透過されて外部へ向けて照射される。 In the vehicle lamp described in Patent Document 1, a substrate is attached to a heat sink having heat dissipation fins, the end of the light guide on the light source side is covered with a cover member (light shielding cover), and the incident surface of the light guide is covered with a light shielding cover. is positioned opposite the light source mounted on the substrate. In such a vehicle lamp, when light is emitted from the light source, the emitted light is incident from the incident surface, guided in a predetermined direction by the light guide, and emitted from the emission surface of the light guide. , is transmitted through the cover and irradiated to the outside.
　光源から光が出射される点灯時には、光源や基板に熱が発生するが、発生した熱はヒートシンクの放熱フィンから放出される。 　When light is emitted from the light source, heat is generated in the light source and the substrate, but the generated heat is released from the heat dissipation fins of the heat sink.
　このような導光体等の光学部品を用いて光を照射する構成においては、光が光学部品によって制御されて出射されるため、光を広範囲の領域において所望の方向へ照射することが可能にされている。 In a configuration in which light is emitted using an optical component such as a light guide, the light is emitted under the control of the optical component, making it possible to irradiate the light in a desired direction over a wide area. It is
特許５５７５５９２号公報Japanese Patent No. 5575592
　ところで、上記のような光学部品の光源側の端部がカバー部材によって覆われる構成においては、カバー部材の内側に空間が形成されており、この空間に発熱源である光源と光学部品の端部が位置され、これらとカバー部材が互いに近接すると、光学部品の端部が高温になるおそれがある。 By the way, in the configuration in which the end portion of the optical component on the light source side is covered with the cover member as described above, a space is formed inside the cover member, and the light source, which is a heat source, and the end portion of the optical component are placed in this space. are positioned and these and the cover member are in close proximity to each other, the ends of the optical components may become hot.
　光学部品の端部が高温になってしまうと、端部に歪みが生じ易くなり、光源から出射される光によって形成される配光パターンに影響が及んだり光学部品から出射される光の輝度が低下する可能性がある。 If the ends of the optical components become hot, the ends are likely to be distorted, affecting the light distribution pattern formed by the light emitted from the light source and reducing the brightness of the light emitted from the optical components. may decline.
　そこで、本発明車輌用灯具は、光学部品における光源側の端部の温度上昇を抑制して光学部品からの適正な出射状態を確保することを目的とする。 Therefore, an object of the vehicle lamp of the present invention is to suppress the temperature rise of the end portion of the optical component on the light source side to ensure an appropriate emission state from the optical component.
　本発明に係る車輌用灯具は、光源が搭載された基板と、前記基板が取り付けられる基板取付部と前記基板取付部から突出された放熱フィンとを有するヒートシンクと、前記光源から出射される光が入射される光学部品と、前記光学部品における前記光源側の端部を覆うカバー部材とを備え、前記ヒートシンクに前記基板取付部から前記基板側に突出され前記光源の点灯時に生じる熱を吸収する吸熱用リブが設けられたものである。 A vehicle lamp according to the present invention includes a substrate on which a light source is mounted, a heat sink having a substrate mounting portion to which the substrate is mounted, and heat radiation fins projecting from the substrate mounting portion, and light emitted from the light source. An optical component for incident light and a cover member covering an end portion of the optical component on the light source side, wherein the heat sink protrudes from the substrate mounting portion toward the substrate side and absorbs heat generated when the light source is turned on. It is provided with a rib for use.
　これにより、光源の点灯時に生じる熱が基板取付部から放熱フィンに伝達されると共に基板側に突出された吸熱用リブから基板取付部を介して放熱フィンに伝達されて放熱フィンから放出される。 As a result, the heat generated when the light source is turned on is transmitted from the board mounting portion to the heat radiating fins, and is also transmitted from the heat absorbing rib protruding toward the board side to the heat radiating fins via the board mounting portion and released from the heat radiating fins.
　本発明によれば、光源の点灯時に生じる熱が基板取付部から放熱フィンに伝達されると共に基板側に突出された吸熱用リブから基板取付部を介して放熱フィンに伝達されて放熱フィンから放出されるため、光源の点灯時に生じる熱が光学部品における光源側の端部に伝達され難くなり、光学部品における光源側の端部の温度上昇を抑制して光学部品からの適正な出射状態を確保することができる。 According to the present invention, the heat generated when the light source is turned on is transmitted from the substrate mounting portion to the heat radiating fins, is transmitted from the heat absorbing rib projecting toward the substrate side to the heat radiating fins via the substrate mounting portion, and is released from the heat radiating fins. Therefore, the heat generated when the light source is turned on is less likely to be transmitted to the end of the optical component on the light source side, suppressing the temperature rise of the end of the optical component on the light source side and ensuring an appropriate light output from the optical component. can do.
図２乃至図７と共に本発明車輌用灯具の実施の形態を示すものであり、本図は、車輌用灯具の分解斜視図である。An embodiment of the vehicle lamp of the present invention is shown together with FIGS. 2 to 7, and this figure is an exploded perspective view of the vehicle lamp. ヒートシンクに取り付けられたカバー部材に導光体が挿入され導光体の端部が光源に対向して位置された状態を示す拡大断面図である。FIG. 4 is an enlarged cross-sectional view showing a state in which a light guide is inserted into a cover member attached to a heat sink and the end of the light guide is positioned facing a light source; 導光体の端部が光源に対向して位置された状態を示す斜視図である。FIG. 4 is a perspective view showing a state in which an end of a light guide is positioned facing a light source; ヒートシンクと基板とガスケットとカバー部材を示す分解斜視図である。FIG. 4 is an exploded perspective view showing a heat sink, a substrate, a gasket, and a cover member; ヒートシンクを示す斜視図である。It is a perspective view showing a heat sink. 吸熱用リブと光源の位置関係等を示す正面図である。FIG. 4 is a front view showing the positional relationship between heat-absorbing ribs and light sources; ヒートシンクに基板とカバー部材が取り付けられた状態を示す斜視図である。FIG. 4 is a perspective view showing a state in which a substrate and a cover member are attached to a heat sink;
　以下に、本発明車輌用灯具を実施するための形態について添付図面を参照して説明する。 A mode for implementing the vehicle lamp of the present invention will be described below with reference to the accompanying drawings.
　車輌用灯具１は、例えば、車体の前端部における左右両端部に取り付けられ、車輌用前照灯及び車輌用標識灯として機能する所謂コンビネーションランプである。但し、車輌用灯具１は、車体の前端部の他に車体の他の部分に取り付けられてもよく、また、テールランプやストップランプやターンシグナルランプ等の車輌用標識灯として単一の機能を有するランプ又は複数の機能を有するコンビネーションランプとして広く適用することができる。 The vehicle lamp 1 is, for example, a so-called combination lamp that is attached to both left and right ends of the front end of the vehicle body and functions as a vehicle headlamp and a vehicle marker lamp. However, the vehicle lamp 1 may be attached to other parts of the vehicle other than the front end of the vehicle, and has a single function as a vehicle indicator light such as a tail lamp, a stop lamp, and a turn signal lamp. It can be widely applied as a lamp or a combination lamp with multiple functions.
　尚、以下には、車輌用灯具１からの光の出射方向を前方として前後上下左右の方向を説明する。但し、以下に示す前後上下左右の方向は説明の便宜上のものであり、本発明の実施に関しては、これらの方向に限定されることはない。 In the following description, the front, back, top, bottom, left, and right directions will be described with the direction of light emitted from the vehicle lamp 1 being the front. However, the front, rear, up, down, left, and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.
　車輌用灯具１は前端に開口が形成されたランプハウジング２とランプハウジング２の開口を閉塞するカバー３とを備えている（図１参照）。ランプハウジング２とカバー３によって灯具外筐４が構成され、灯具外筐４の内部空間が灯室５として形成されている。 A vehicle lamp 1 includes a lamp housing 2 having an opening at its front end and a cover 3 closing the opening of the lamp housing 2 (see FIG. 1). A lamp housing 4 is formed by the lamp housing 2 and the cover 3 , and an internal space of the lamp housing 4 is formed as a lamp chamber 5 .
　ランプハウジング２には取付孔２ａ、２ａが左右に離隔して形成されている。ランプハウジング２には車輌を基準とした左右方向における外側の端部に配置孔２ｂが形成されている。ランプハウジング２には取付孔２ａ、２ａにそれぞれ図示しない第１の灯具ユニットと第２の灯具ユニットが挿入されて取り付けられている。第１の灯具ユニットはハイビーム用の前照灯ユニットであり、第２の灯具ユニットはロービーム用の前照灯ユニットである。 Mounting holes 2a, 2a are formed in the lamp housing 2 so as to be separated from each other in the left and right direction. A placement hole 2b is formed in the lamp housing 2 at the outer end portion in the left-right direction with respect to the vehicle. A first lamp unit and a second lamp unit (not shown) are inserted into the mounting holes 2a, 2a of the lamp housing 2, respectively. The first lamp unit is a headlamp unit for high beam, and the second lamp unit is a headlamp unit for low beam.
　灯室５にはエクステンション（ベゼル）６が配置されている。エクステンション６は外形状がカバー３の外形状と略同じにされ大きさがカバー３より一回り小さくされている。エクステンション６にはレンズ配置孔６ａ、６ａが左右に離隔して形成されている。レンズ配置孔６ａ、６ａにはそれぞれ第１の灯具ユニットの投影レンズと第２の灯具ユニットの投影レンズとが挿入されて配置される。エクステンション６にはレンズ配置孔６ａ、６ａの側方から下方に亘る部分にユニット配置孔６ｂが形成されている。 An extension (bezel) 6 is arranged in the lamp chamber 5 . The extension 6 has an outer shape substantially the same as that of the cover 3 and a size smaller than that of the cover 3. - 特許庁 Lens arrangement holes 6a, 6a are formed in the extension 6 so as to be separated from each other in the left and right direction. The projection lens of the first lamp unit and the projection lens of the second lamp unit are inserted and arranged in the lens arrangement holes 6a, 6a, respectively. A unit placement hole 6b is formed in the extension 6 in a portion extending from the side to the bottom of the lens placement holes 6a, 6a.
　エクステンション６には後面に導光ユニット７が取り付けられる。導光ユニット７はリフレクター８と制御レンズ９と導光体１０によって構成されている。 A light guide unit 7 is attached to the rear surface of the extension 6 . The light guide unit 7 is composed of a reflector 8 , a control lens 9 and a light guide 10 .
　リフレクター８は外形状がエクステンション６のユニット配置孔６ｂと略同じ形状に形成され大きさがユニット配置孔６ｂより一回り大きくされている。リフレクター８は、所定の方向に延びる保持部８ａと、保持部８ａからそれぞれ外側に突出された複数の取付突部８ｂと、保持部８ａの両端部にそれぞれ連続して設けられた取付部８ｃ、８ｃとを有している。リフレクター８には長手方向における両端部にそれぞれ被取付部８ｄ、８ｄが設けられている。リフレクター８には一方の取付部８ｃに連続する位置に挿通孔８ｅが形成されている。リフレクター８には保持部８ａの表面にアルミニウム等による蒸着が施され、保持部８ａが光の高い反射性能を有する状態にされている。 The reflector 8 has an outer shape that is substantially the same as the unit arrangement hole 6b of the extension 6, and is one size larger than the unit arrangement hole 6b. The reflector 8 includes a holding portion 8a extending in a predetermined direction, a plurality of mounting projections 8b projecting outward from the holding portion 8a, mounting portions 8c continuously provided at both ends of the holding portion 8a, 8c. The reflector 8 is provided with attached portions 8d, 8d at both ends in the longitudinal direction. An insertion hole 8e is formed in the reflector 8 at a position continuous with one mounting portion 8c. In the reflector 8, the surface of the holding portion 8a is vapor-deposited with aluminum or the like so that the holding portion 8a has a high light reflecting performance.
　制御レンズ９はリフレクター８と略同じ形状及び大きさに形成され、所定の方向に延びる光制御部９ａと光制御部９ａからそれぞれ外側に突出された複数の被取付突部９ｂとを有している。光制御部９ａには図示しないレンズステップが形成され、光制御部９ａは光の拡散機能を有している。 The control lens 9 is formed in substantially the same shape and size as the reflector 8, and has a light control portion 9a extending in a predetermined direction and a plurality of mounting projections 9b projecting outward from the light control portion 9a. there is A lens step (not shown) is formed in the light control portion 9a, and the light control portion 9a has a light diffusion function.
　導光体１０は透明な樹脂材料によって形成され、後述する光源から出射される光が入射される光学部品として機能する。尚、車輌用灯具１においては、光学部品として導光体１０に代えてインナーレンズ等の他の部品が設けられていてもよい。 The light guide 10 is made of a transparent resin material and functions as an optical component into which light emitted from a light source, which will be described later, is incident. In addition, in the vehicle lamp 1, other parts such as an inner lens may be provided as optical parts in place of the light guide body 10. FIG.
　導光体１０はリフレクター８の保持部８ａと同じ所定の方向に延びる導光部１１とリフレクター８に取り付けられる被取付用突部１２、１２とを有している。導光部１１は後面に図示しない反射ステップを有し、反射ステップを有する部分の前面が出射面１１ａとして形成されている。導光部１１における車輌を基準とした外側の端部１３は一方の被取付用突部１２より後側に位置されている。被取付用突部１２、１２は導光部１１の一端寄りの位置と導光部１１の他端とからそれぞれ突出されている。端部１３の端面は入射面１３ａとして形成されている（図２参照）。端部１３には左右方向において外方に突出された突き当て突部１３ｂ、１３ｂが設けられ、突き当て突部１３ｂ、１３ｂは入射面１３ａより前方に位置されている（図３参照）。 The light guide 10 has a light guide portion 11 extending in the same predetermined direction as the holding portion 8 a of the reflector 8 and attachment projections 12 , 12 attached to the reflector 8 . The light guide portion 11 has a reflection step (not shown) on its rear surface, and the front surface of the portion having the reflection step is formed as an emission surface 11a. An outer end portion 13 of the light guide portion 11 with respect to the vehicle is positioned on the rear side of one mounting projection portion 12 . The attachment projections 12 , 12 protrude from a position near one end of the light guide portion 11 and the other end of the light guide portion 11 , respectively. An end surface of the end portion 13 is formed as an incident surface 13a (see FIG. 2). The end portion 13 is provided with abutment projections 13b, 13b projecting outward in the left-right direction, and the abutment projections 13b, 13b are positioned in front of the incident surface 13a (see FIG. 3).
　導光体１０は被取付用突部１２、１２がそれぞれリフレクター８の取付部８ｃ、８ｃにネジ止め等によって取り付けられ、保持部８ａに保持される（図１参照）。導光体１０が保持部８ａに保持された状態においては、端部１３が挿通孔８ｅに挿通される。 The light guide 10 is held by the holding portion 8a by screwing the mounting protrusions 12, 12 to the mounting portions 8c, 8c of the reflector 8, respectively (see FIG. 1). When the light guide 10 is held by the holding portion 8a, the end portion 13 is inserted through the insertion hole 8e.
　制御レンズ９は被取付突部９ｂ、９ｂ、・・・がそれぞれリフレクター８の取付突部８ｂ、８ｂ、・・・に取り付けられる。制御レンズ９がリフレクター８に取り付けられた状態においては、導光体１０の長手方向における両端部以外の部分が制御レンズ９によって前方から覆われる。 Attached protrusions 9b, 9b, . . . of the control lens 9 are attached to the attachment protrusions 8b, 8b, . When the control lens 9 is attached to the reflector 8 , the control lens 9 covers the light guide 10 from the front except for both ends in the longitudinal direction.
　このように導光体１０と制御レンズ９がリフレクター８に取り付けられることにより導光ユニット７が構成される。導光ユニット７はリフレクター８の被取付部８ｄ、８ｄがエクステンション６に後面側からネジ止め等によって取り付けられる。導光ユニット７がエクステンション６に取り付けられた状態においては、制御レンズ９がユニット配置孔６ｂに挿入されて配置される。 The light guide unit 7 is configured by attaching the light guide 10 and the control lens 9 to the reflector 8 in this manner. The light guide unit 7 is attached to the extension 6 by screws or the like from the rear side at the attached portions 8d, 8d of the reflector 8. As shown in FIG. In the state where the light guide unit 7 is attached to the extension 6, the control lens 9 is inserted and arranged in the unit arrangement hole 6b.
　エクステンション６は導光ユニット７が取り付けられた状態においてカバー３に後面側からネジ止め等によって取り付けられる。 The extension 6 is attached to the cover 3 by screwing or the like from the rear surface side in a state where the light guide unit 7 is attached.
　ランプハウジング２には後面側からヒートシンク１４がネジ止め等によって取り付けられる。ヒートシンク１４は放熱性の高いアルミニウム等の金属材料によって各部が一体に形成されている（図４及び図５参照）。ヒートシンク１４は前後方向を向く基板取付部１５と基板取付部１５から左右に並んだ状態で後方に突出された放熱フィン１６、１６、・・・と基板取付部１５から外方に張り出された被取付板部１７とを有している。 A heat sink 14 is attached to the lamp housing 2 from the rear side by screwing or the like. Each part of the heat sink 14 is integrally formed of a metal material such as aluminum having high heat dissipation (see FIGS. 4 and 5). The heat sink 14 has a substrate mounting portion 15 facing in the front-rear direction, radiation fins 16, 16, . . . and an attached plate portion 17 .
　基板取付部１５は前面が被取付板部１７の前面より前方に位置され、基板取付部１５の周囲には前方に突出された枠状部１８が設けられている。ヒートシンク１４には基板取付部１５と枠状部１８の間に前方に開口された環状の挿入溝１４ａが形成されている。 The front surface of the substrate mounting portion 15 is located forward of the front surface of the mounted plate portion 17, and a frame-shaped portion 18 protruding forward is provided around the substrate mounting portion 15. As shown in FIG. The heat sink 14 is formed with an annular insertion groove 14a opening forward between the board mounting portion 15 and the frame portion 18. As shown in FIG.
　ヒートシンク１４には基板取付部１５から前方に突出された位置決めピン１４ｂ、１４ｂが左右に離隔して設けられている。基板取付部１５には位置決めピン１４ｂ、１４ｂの間に、前方に開口された螺穴１５ａが形成されている。 The heat sink 14 is provided with positioning pins 14b, 14b that protrude forward from the board mounting portion 15 and are spaced apart from each other to the left and right. A screw hole 15a opening forward is formed in the substrate mounting portion 15 between the positioning pins 14b, 14b.
　ヒートシンク１４には基板取付部１５から前方に突出された第１の吸熱用リブ１９が設けられている。第１の吸熱用リブ１９は螺穴１５ａの直ぐ上側に位置されている。第１の吸熱用リブ１９は上下方向を向き左右方向に延びる平板状のベース部２０とベース部２０の各部からそれぞれ上方に突出された平板状の突部２１、２２、２３、２４とによって構成されている。突部２１、２２、２３、２４は順に左右に離隔して位置され、突部２１がベース部２０の左右方向における一方の端部から上方に突出され、突部２４がベース部２０の左右方向における他方の端部から上方に突出されている。 The heat sink 14 is provided with first heat-absorbing ribs 19 projecting forward from the board mounting portion 15 . The first heat absorbing rib 19 is positioned immediately above the screw hole 15a. The first heat-absorbing rib 19 is composed of a flat plate-like base portion 20 facing in the vertical direction and extending in the left-right direction, and flat plate- like protrusions 21, 22, 23, and 24 projecting upward from respective portions of the base portion 20. It is The protrusions 21 , 22 , 23 , and 24 are spaced apart from each other in order in the left and right direction. is protruding upward from the other end of the
　ベース部２０は、突部２１と突部２２の間の部分が第１の部分２０ａとして設けられ、突部２２と突部２３の間の部分が第２の部分２０ｂとして設けられ、突部２３と突部２４の間の部分が第３の部分２０ｃとして設けられている。第１の吸熱用リブ１９には、突部２１と突部２２と第１の部分２０ａによって上方に開口された凹部１９ａが形成され、突部２２と突部２３と第２の部分２０ｂによって上方に開口された凹部１９ｂが形成され、突部２３と突部２４と第３の部分２０ｃによって上方に開口された凹部１９ｃが形成されている。 The base portion 20 has a first portion 20a between the projections 21 and 22, a second portion 20b between the projections 22 and 23, and a second portion 20b between the projections 21 and 23. and the protrusion 24 is provided as a third portion 20c. The first heat-absorbing rib 19 is formed with a concave portion 19a opened upward by the projections 21, 22, and the first portion 20a, and is upwardly opened by the projections 22, 23, and the second portion 20b. A concave portion 19b that is open to the outside is formed, and a concave portion 19c that is open upward is formed by the projections 23, 24 and the third portion 20c.
　ヒートシンク１４には基板取付部１５の上端部から前方に突出された第２の吸熱用リブ２５が設けられている。第２の吸熱用リブ２５は上下方向を向き左右方向に延びる平板状に形成され、第１の吸熱用リブ１９の真上に位置されている。第２の吸熱用リブ２５は左右方向における幅が第１の吸熱用リブ１９の左右方向における幅と略同じか稍小さくされている。 The heat sink 14 is provided with a second heat absorbing rib 25 projecting forward from the upper end portion of the board mounting portion 15 . The second heat-absorbing rib 25 is formed in a flat plate-like shape extending in the left-right direction while facing the up-down direction, and is positioned right above the first heat-absorbing rib 19 . The width of the second heat absorption rib 25 in the left-right direction is substantially the same as or slightly smaller than the width of the first heat absorption rib 19 in the left-right direction.
　ヒートシンク１４においては基板取付部１５と放熱フィン１６と被取付板部１７と枠状部１８と第１の吸熱用リブ１９と第２の吸熱用リブ２５が一体に形成されている。従って、部品点数の削減による車輌用灯具１の製造コストの低減を図ることができる。 In the heat sink 14, the board mounting portion 15, the heat radiating fins 16, the mounted plate portion 17, the frame portion 18, the first heat absorbing rib 19, and the second heat absorbing rib 25 are integrally formed. Therefore, it is possible to reduce the manufacturing cost of the vehicle lamp 1 by reducing the number of parts.
　ヒートシンク１４には挿入溝１４ａにゴム材料等によって形成された環状のガスケット２６が挿入される。 An annular gasket 26 made of a rubber material or the like is inserted into the insertion groove 14a of the heat sink 14 .
　ヒートシンク１４は挿入溝１４ａにガスケット２６が挿入された状態において、被取付板部１７がランプハウジング２における配置孔２ｂの周囲の部分に後方からネジ止め等によって取り付けられる。ヒートシンク１４がランプハウジング２に取り付けられた状態においては、ガスケット２６が配置孔２ｂの周囲の部分に後方から押し付けられ、配置孔２ｂからのランプハウジング２の内部への水分の侵入が防止される。 With the gasket 26 inserted into the insertion groove 14a of the heat sink 14, the mounting plate portion 17 is attached to the portion surrounding the placement hole 2b in the lamp housing 2 from behind by screwing or the like. In the state where the heat sink 14 is attached to the lamp housing 2, the gasket 26 is pressed against the portion surrounding the placement hole 2b from behind to prevent moisture from entering the interior of the lamp housing 2 through the placement hole 2b.
　ヒートシンク１４の基板取付部１５には前方から基板２７が取り付けられる（図４及び図６参照）。基板２７は基板取付部１５と略同じ形状及び略同じ大きさに形成されている。基板２７には位置決め孔２７ａ、２７ａとネジ挿通孔２７ｂが形成され、位置決め孔２７ａ、２７ａが左右に離隔して位置されネジ挿通孔２７ｂが位置決め孔２７ａ、２７ａの間に位置されている。基板２７にはヒートシンク１４の第１の吸熱用リブ１９が挿通されるリブ挿通孔２７ｃが形成されている。 A substrate 27 is attached from the front to the substrate attachment portion 15 of the heat sink 14 (see FIGS. 4 and 6). The substrate 27 is formed in substantially the same shape and size as the substrate mounting portion 15 . Positioning holes 27a, 27a and a screw insertion hole 27b are formed in the substrate 27. The positioning holes 27a, 27a are positioned laterally apart, and the screw insertion hole 27b is positioned between the positioning holes 27a, 27a. The substrate 27 is formed with rib insertion holes 27c through which the first heat absorbing ribs 19 of the heat sink 14 are inserted.
　基板２７の前面にはリブ挿通孔２７ｃの上側に、例えば、三つの光源２８（光源２８Ａ、２８Ｂ、２８Ｃ）が左右に離隔して搭載されている。尚、基板２７に搭載される光源２８の数は任意であり、また、基板２７に対する光源２８の各搭載位置も任意である。光源２８としては、例えば、発光ダイオード（ＬＥＤ：Light Emitting Diode）が用いられている。光源２８からは、例えば、デイタイムランニングランプやクリアランスランプやターンシグナルランプの光が出射される。 For example, three light sources 28 ( light sources 28A, 28B, 28C) are mounted on the front surface of the substrate 27 above the rib insertion holes 27c so as to be spaced apart from each other to the left and right. The number of light sources 28 mounted on the board 27 is arbitrary, and each mounting position of the light sources 28 on the board 27 is also arbitrary. As the light source 28, for example, a light emitting diode (LED) is used. The light source 28 emits light from, for example, a daytime running lamp, a clearance lamp, or a turn signal lamp.
　ヒートシンク１４の基板取付部１５には前方からカバー部材２９が取り付けられる（図２、図４及び図７参照）。カバー部材２９は、例えば、樹脂材料によって形成され、導光体１０を位置決めする位置決め部３０と位置決め部３０の外周部から外方に張り出された結合部３１とを有している。 A cover member 29 is attached to the board attachment portion 15 of the heat sink 14 from the front (see FIGS. 2, 4 and 7). The cover member 29 is made of, for example, a resin material, and has a positioning portion 30 for positioning the light guide 10 and a coupling portion 31 projecting outward from the outer peripheral portion of the positioning portion 30 .
　位置決め部３０は環状に形成され、内周面の少なくとも一部が案内面３０ａとして形成され、案内面３０ａは後方へ行くに従って内方に変位する傾斜面にされている。位置決め部３０には後端寄りの位置に前方を向く受け面３０ｂ、３０ｂが左右に離隔して形成され、受け面３０ｂ、３０ｂは案内面３０ａに連続して位置されている。位置決め部３０における案内面３０ａの内側の空間は保持孔３０ｃとして形成されている。 The positioning part 30 is formed in an annular shape, and at least part of the inner peripheral surface is formed as a guide surface 30a, and the guide surface 30a is an inclined surface that displaces inward as it goes rearward. Receiving surfaces 30b, 30b facing forward are formed at positions near the rear end of the positioning portion 30 so as to be separated from each other in the left and right directions. A space inside the guide surface 30a in the positioning portion 30 is formed as a holding hole 30c.
　結合部３１は位置決め部３０の外周部における後端部から外方に張り出されている。結合部３１には位置決め部３０の下側に位置決め孔３１ａ、３１ａとネジ挿通孔３１ｂが形成され、位置決め孔３１ａ、３１ａが左右に離隔して位置されネジ挿通孔３１ｂが位置決め孔３１ａ、３１ａの間に位置されている。 The coupling portion 31 protrudes outward from the rear end portion of the outer peripheral portion of the positioning portion 30 . Positioning holes 31a and 31a and a screw insertion hole 31b are formed in the connecting portion 31 below the positioning portion 30. The positioning holes 31a and 31a are spaced apart from each other to the left and right, and the screw insertion hole 31b is located between the positioning holes 31a and 31a. located in between.
　基板２７とカバー部材２９は基板取付部１５に、例えば、共締めによって取り付けられる。基板２７は位置決め孔２７ａ、２７ａにそれぞれ位置決めピン１４ｂ、１４ｂが挿入されることにより基板取付部１５に対して位置決めされ、カバー部材２９は位置決め孔３１ａ、３１ａにそれぞれ位置決めピン１４ｂ、１４ｂが挿入されることにより基板取付部１５に対して位置決めされた基板２７に対して位置決めされる。 The substrate 27 and the cover member 29 are attached to the substrate attachment portion 15 by, for example, fastening together. The substrate 27 is positioned with respect to the substrate mounting portion 15 by inserting positioning pins 14b, 14b into the positioning holes 27a, 27a, respectively, and the cover member 29 has positioning pins 14b, 14b inserted into the positioning holes 31a, 31a respectively. As a result, it is positioned with respect to the board 27 positioned with respect to the board mounting portion 15 .
　このときリブ挿通孔２７ｃにヒートシンク１４の第１の吸熱用リブ１９が後方から挿通され、第１の吸熱用リブ１９が基板２７の前側に位置される。また、ヒートシンク１４の第２の吸熱用リブ２５は基板２７の上側において基板２７の前側に位置される。従って、光源２８、２８、２８の下方と上方にそれぞれ第１の吸熱用リブ１９と第２の吸熱用リブ２５が位置される。 At this time, the first heat absorbing rib 19 of the heat sink 14 is inserted into the rib insertion hole 27 c from behind, and the first heat absorbing rib 19 is positioned on the front side of the substrate 27 . Also, the second heat absorbing rib 25 of the heat sink 14 is positioned on the front side of the substrate 27 on the upper side of the substrate 27 . Therefore, the first heat absorbing rib 19 and the second heat absorbing rib 25 are positioned below and above the light sources 28, 28, 28, respectively.
　基板２７とカバー部材２９は位置決めされた状態において、ネジ挿通孔３１ｂとネジ挿通孔２７ｂに順に挿通された取付ネジ５０が螺穴１５ａに螺合されることにより基板取付部１５に共締めによって取り付けられる。 When the substrate 27 and the cover member 29 are positioned, the mounting screws 50 are inserted through the screw insertion holes 31b and 27b in order, and are screwed into the screw holes 15a to be attached to the substrate attachment portion 15 by fastening together. be done.
　基板２７とカバー部材２９が基板取付部１５に取り付けられた状態においては、ヒートシンク１４の第１の吸熱用リブ１９とヒートシンク１４の第２の吸熱用リブ２５と基板２７に搭載された光源２８、２８、２８がカバー部材２９の位置決め部３０によって前側から覆われ、基板２７と位置決め部３０の間に空間３２が形成される。従って、第１の吸熱用リブ１９と第２の吸熱用リブ２５と光源２８、２８、２８は空間３２に位置される。 When the substrate 27 and the cover member 29 are attached to the substrate attachment portion 15, the first heat absorption rib 19 of the heat sink 14, the second heat absorption rib 25 of the heat sink 14, the light source 28 mounted on the substrate 27, 28 , 28 are covered from the front side by the positioning portion 30 of the cover member 29 , and a space 32 is formed between the substrate 27 and the positioning portion 30 . Therefore, the first heat absorbing rib 19 , the second heat absorbing rib 25 and the light sources 28 , 28 , 28 are positioned in the space 32 .
　ランプハウジング２はヒートシンク１４が取り付けられた状態において、カバー３に後側から取り付けられ、ランプハウジング２とカバー３によって灯具外筐４が構成される。このとき導光体１０の端部１３がカバー部材２９によって光源２８、２８、２８に対して位置決めされる。 With the heat sink 14 attached, the lamp housing 2 is attached to the cover 3 from the rear side, and the lamp housing 2 and the cover 3 constitute the lamp housing 4 . At this time, the end portion 13 of the light guide 10 is positioned with respect to the light sources 28 , 28 , 28 by the cover member 29 .
　端部１３はカバー部材２９の案内面３０ａに案内されて保持孔３０ｃに前側から挿通され、突き当て突部１３ｂ、１３ｂがそれぞれ受け面３０ｂ、３０ｂに前方から突き当てられることにより光源２８に対する前後方向における位置決めが行われ、案内面３０ａに案内されて保持孔３０ｃに挿通されることにより光源２８に対する上下方向及び左右方向における位置決めが行われる。端部１３が光源２８、２８、２８に対して位置決めされることにより、入射面１３ａが光源２８、２８、２８と一定の距離を有した状態で対向して位置される（図２及び図３参照）。 The end portion 13 is guided by the guide surface 30a of the cover member 29 and is inserted through the holding hole 30c from the front side. The light source 28 is positioned vertically and horizontally by being guided by the guide surface 30a and inserted into the holding hole 30c. The end portion 13 is positioned with respect to the light sources 28, 28, 28 so that the incident surface 13a faces the light sources 28, 28, 28 at a constant distance (FIGS. 2 and 3). reference).
　上記のように構成された車輌用灯具１において、光源２８から光が出射されると、出射された光が入射面１３ａから導光体１０に入射されて導光部１１によって導かれ出射面１１ａから出射され、カバー３を透過されて外部へ向けて照射される。 In the vehicle lamp 1 configured as described above, when light is emitted from the light source 28, the emitted light is incident on the light guide member 10 through the incident surface 13a, guided by the light guide portion 11, and then emitted from the emitting surface 11a. , is transmitted through the cover 3 and radiated to the outside.
　光源２８の点灯時には熱が生じるが、生じた熱の一部はヒートシンク１４の基板取付部１５から放熱フィン１６、１６、・・・に伝達されて放熱フィン１６、１６、・・・から放出される。また、生じた熱の他の一部はヒートシンク１４の第１の吸熱用リブ１９と第２の吸熱用リブ２５に吸収され、第１の吸熱用リブ１９と第２の吸熱用リブ２５から基板取付部１５を介して放熱フィン１６、１６、・・・に伝達されて放熱フィン１６、１６、・・・から放出される。 Heat is generated when the light source 28 is turned on, and part of the generated heat is transmitted from the board mounting portion 15 of the heat sink 14 to the radiation fins 16, 16, . be. Another part of the generated heat is absorbed by the first heat absorbing ribs 19 and the second heat absorbing ribs 25 of the heat sink 14, and the first heat absorbing ribs 19 and the second heat absorbing ribs 25 dissipate the heat from the substrate. It is transmitted to the radiating fins 16, 16, .
　このとき最も左側に位置された光源２８Ａから出射された光のうち入射面１３ａに入射されなかった光の一部は、第１の吸熱用リブ１９の突部２１から突部２２に亘る範囲（図６に示す範囲Ａ参照）に到達し、到達した光に含まれる熱が突部２１と突部２２とベース部２０の第１の部分２０ａとに吸収される。また、左右方向における中央に位置された光源２８Ｂから出射された光のうち入射面１３ａに入射されなかった光の一部は、第１の吸熱用リブ１９の突部２１から突部２３に亘る範囲（図６に示す範囲Ｂ参照）に到達し、到達した光に含まれる熱が突部２１と突部２２と突部２３と第１の部分２０ａと第２の部分２０ｂに吸収される。さらに、最も右側に位置された光源２８Ｃから出射された光のうち入射面１３ａに入射されなかった光の一部は、第１の吸熱用リブ１９の突部２２から突部２４に亘る範囲（図６に示す範囲Ｃ参照）に到達し、到達した光に含まれる熱が突部２２と突部２３と突部２４と第２の部分２０ｂと第３の部分２０ｃに吸収される。 At this time, of the light emitted from the leftmost light source 28A, part of the light that is not incident on the incident surface 13a is in a range ( 6), and the heat contained in the reaching light is absorbed by the projections 21, 22, and the first portion 20a of the base portion 20. As shown in FIG. Part of the light emitted from the light source 28B positioned in the center in the left-right direction but not incident on the incident surface 13a extends from the protrusion 21 to the protrusion 23 of the first heat-absorbing rib 19. When the light reaches the range (see range B shown in FIG. 6), the heat contained in the reaching light is absorbed by the protrusions 21, 22, 23, the first portion 20a, and the second portion 20b. Furthermore, part of the light emitted from the rightmost light source 28C that is not incident on the incident surface 13a extends from the projection 22 to the projection 24 of the first heat absorbing rib 19 ( 6), and the heat contained in the arriving light is absorbed by the protrusions 22, 23, 24, the second portion 20b, and the third portion 20c.
　このように光源２８、２８、２８から出射された光が第１の吸熱用リブ１９に到達して光に含まれる熱が第１の吸熱用リブ１９の各部に吸収されるため、光源２８、２８、２８の点灯時に生じる熱が効率的にヒートシンク１４に吸収され、ヒートシンク１４からの放熱効率の向上を図ることができる。特に、第１の吸熱用リブ１９はベース部２０と突部２１、２２、２３、２４によって構成されて櫛歯状に形成され、表面積（吸熱面積）が大きな形状に形成されているため、吸熱量が大きくヒートシンク１４からの大きな放熱量を確保することができる。 The light emitted from the light sources 28 , 28 , 28 in this way reaches the first heat absorbing rib 19 and the heat contained in the light is absorbed by each part of the first heat absorbing rib 19 . The heat generated when the lamps 28, 28 are lit is efficiently absorbed by the heat sink 14, and the heat radiation efficiency from the heat sink 14 can be improved. In particular, the first heat absorbing rib 19 is composed of a base portion 20 and protrusions 21, 22, 23, and 24, and is formed in a comb-like shape, and is formed in a shape having a large surface area (heat absorbing area). The amount of heat is large, and a large amount of heat radiation from the heat sink 14 can be ensured.
　また、光源２８、２８、２８の点灯時には、上記したように、出射された光の一部が第１の吸熱用リブ１９の各部に向かうため、光に含まれる熱が第１の吸熱用リブ１９の凹部１９ａと凹部１９ｂと凹部１９ｃに一時的に貯留した後に上方へ流動される可能性がある。上方へ流動された熱は第１の吸熱用リブ１９の上方に位置された第２の吸熱用リブ２５に吸収され、第２の吸熱用リブ２５から基板取付部１５を介して放熱フィン１６、１６、・・・に伝達されて放熱フィン１６、１６、・・・から放出される。 Further, when the light sources 28, 28, 28 are turned on, part of the emitted light is directed to each part of the first heat absorbing ribs 19 as described above, so that the heat contained in the light is transferred to the first heat absorbing ribs. There is a possibility that it will flow upward after being temporarily stored in the recesses 19a, 19b, and 19c of 19 . The heat flowing upward is absorbed by the second heat-absorbing ribs 25 positioned above the first heat-absorbing ribs 19 . 16, . . . and emitted from the radiation fins 16, 16, .
　従って、第１の吸熱用リブ１９に加えて第２の吸熱用リブ２５が設けられることにより、光源２８、２８、２８の点灯時における一層の放熱効率の向上を図ることができる。 Therefore, by providing the second heat-absorbing ribs 25 in addition to the first heat-absorbing ribs 19, it is possible to further improve the heat radiation efficiency when the light sources 28, 28, 28 are lit.
　尚、ヒートシンク１４の高い放熱効率を確認するために、第１の吸熱用リブ１９及び第２の吸熱用リブ２５が設けられていないヒートシンクと第１の吸熱用リブ１９及び第２の吸熱用リブ２５が設けられたヒートシンク１４とについて、データの測定を行った。 In order to confirm the high heat radiation efficiency of the heat sink 14, a heat sink without the first heat absorption rib 19 and the second heat absorption rib 25 and the first heat absorption rib 19 and the second heat absorption rib Data was measured for the heat sink 14 provided with 25 .
　測定は６０度の雰囲気において、光源２８、２８、２８の点灯前と光源２８、２８、２８の点灯後について導光体１０の入射面１３ａの温度を検出することにより行った。 The measurement was performed by detecting the temperature of the incident surface 13a of the light guide 10 before the light sources 28, 28, 28 were turned on and after the light sources 28, 28, 28 were turned on in an atmosphere of 60 degrees.
　測定により、第１の吸熱用リブ１９及び第２の吸熱用リブ２５が設けられていないヒートシンクにおける入射面１３ａの飽和温度に達するまでの上昇温度は３６．８度であり、第１の吸熱用リブ１９及び第２の吸熱用リブ２５が設けられたヒートシンク１４における入射面１３ａの飽和温度に達するまでの上昇温度は２９．７度である結果が得られた。従って、第１の吸熱用リブ１９と第２の吸熱用リブ２５が設けられることにより７．１度の温度の上昇が抑制され、第１の吸熱用リブ１９及び第２の吸熱用リブ２５が設けられたヒートシンク１４について、高い放熱効率を確保することができることが確認された。 According to the measurement, the temperature rise until reaching the saturation temperature of the incident surface 13a of the heat sink without the first heat absorbing rib 19 and the second heat absorbing rib 25 is 36.8 degrees. A result was obtained that the temperature rise until reaching the saturation temperature of the incident surface 13a of the heat sink 14 provided with the ribs 19 and the second heat absorbing ribs 25 was 29.7 degrees. Therefore, by providing the first heat absorbing rib 19 and the second heat absorbing rib 25, the temperature rise of 7.1 degrees is suppressed, and the first heat absorbing rib 19 and the second heat absorbing rib 25 are It was confirmed that the provided heat sink 14 can ensure high heat radiation efficiency.
　以上に記載した通り、車輌用灯具１にあっては、基板２７が取り付けられる基板取付部１５と基板取付部１５から突出された放熱フィン１６とを有するヒートシンク１４と、光源２８から出射される光が入射される光学部品として機能する導光体１０と、導光体１０の光源２８側の端部を覆うカバー部材２９とを備え、ヒートシンク１４に基板取付部１５から基板２７側に突出され光源２８の点灯時に生じる熱を吸収する第１の吸熱用リブ１９及び第２の吸熱用リブ２５が設けられている。 As described above, the vehicle lamp 1 includes the heat sink 14 having the board mounting portion 15 to which the board 27 is mounted and the heat radiation fins 16 projecting from the board mounting portion 15, and the light emitted from the light source 28. and a cover member 29 covering the end of the light guide 10 on the light source 28 side. A first heat-absorbing rib 19 and a second heat-absorbing rib 25 are provided to absorb heat generated when the lamp 28 is lit.
　従って、光源２８の点灯時に生じる熱が基板取付部１５から放熱フィン１６に伝達されると共に基板２７側に突出された第１の吸熱用リブ１９及び第２の吸熱用リブ２５から基板取付部１５を介して放熱フィン１６に伝達されて放熱フィン１６から放出される。これにより、光源２８の点灯時に生じる熱が導光体１０における光源２８側の端部１３に伝達され難くなり、端部１３の温度上昇を抑制して導光体１０からの適正な出射状態を確保することができる。 Therefore, the heat generated when the light source 28 is turned on is transmitted from the board mounting portion 15 to the heat radiation fins 16, and is transmitted from the first heat absorbing rib 19 and the second heat absorbing rib 25 projecting toward the board 27 side to the board mounting portion 15. is transmitted to the heat radiating fins 16 via and emitted from the heat radiating fins 16 . As a result, the heat generated when the light source 28 is turned on is less likely to be transmitted to the end portion 13 of the light guide 10 on the light source 28 side, thereby suppressing the temperature rise of the end portion 13 and ensuring an appropriate light emission state from the light guide 10. can be secured.
　また、カバー部材２９と基板２７の間に光源２８が位置される空間３２が形成され、空間３２に第１の吸熱用リブ１９及び第２の吸熱用リブ２５が位置されている。 A space 32 in which the light source 28 is positioned is formed between the cover member 29 and the substrate 27 , and the first heat absorbing rib 19 and the second heat absorbing rib 25 are positioned in the space 32 .
　従って、カバー部材２９と基板２７の間に形成された空間３２に光源２８と第１の吸熱用リブ１９と第２の吸熱用リブ２５が位置されるため、光源２８から空間３２に放出されて蓄積される熱を効率的に吸収することが可能になり、放熱効率の向上を図ることができる。 Therefore, since the light source 28, the first heat absorbing rib 19, and the second heat absorbing rib 25 are positioned in the space 32 formed between the cover member 29 and the substrate 27, the light emitted from the light source 28 into the space 32 is It becomes possible to efficiently absorb the accumulated heat, and it is possible to improve the heat radiation efficiency.
　さらに、光源２８、２８、２８が所定の方向に離隔して並んだ状態で位置され、第１の吸熱用リブ１９に光源２８、２８、２８の並び方向に延びるベース部２０とベース部２０の各部からそれぞれ光源２８側に突出された突部２１、２２、２３、２４とが設けられている。 Furthermore, the light sources 28 , 28 , 28 are arranged in a predetermined direction with a space therebetween, and the first heat-absorbing rib 19 extends in the direction in which the light sources 28 , 28 , 28 are arranged. Protrusions 21, 22, 23, and 24 protruding from each portion toward the light source 28 are provided.
　従って、第１の吸熱用リブ１９の吸熱面積が大きくなり、光源２８の点灯時に生じる熱の吸収量を増加させて放熱効率の向上を図ることができる。 Therefore, the heat absorption area of the first heat absorption rib 19 is increased, and the amount of heat absorbed when the light source 28 is turned on can be increased to improve the heat radiation efficiency.
　さらにまた、ベース部２０の長手方向における両端がそれぞれ複数の光源２８の並び方向における両端より外側に位置されている。 Furthermore, both ends of the base portion 20 in the longitudinal direction are positioned outside the ends of the plurality of light sources 28 in the arrangement direction.
　従って、ベース部２０によって光源２８から出射される光を受け易くなるため、光に含まれる熱を吸収して光源２８の点灯時に生じる熱の吸収量をより増加させて一層の放熱効率の向上を図ることができる。 Therefore, since the light emitted from the light source 28 is easily received by the base portion 20, the heat contained in the light is absorbed to further increase the heat absorption amount generated when the light source 28 is turned on, thereby further improving the heat radiation efficiency. can be planned.
　加えて、第１の吸熱用リブ１９と第２の吸熱用リブ２５が光源２８、２８、２８を挟んだ反対側に位置されている。 In addition, the first heat absorbing rib 19 and the second heat absorbing rib 25 are positioned on opposite sides of the light sources 28 , 28 , 28 .
　従って、第１の吸熱用リブ１９と第２の吸熱用リブ２５の双方によって光源２８の点灯時に生じる熱が吸収されるため、光源２８の点灯時に生じる熱の吸収量をより一層増加させてより一層の放熱効率の向上を図ることができる。 Therefore, both the first heat-absorbing rib 19 and the second heat-absorbing rib 25 absorb the heat generated when the light source 28 is turned on. It is possible to further improve the heat radiation efficiency.
　尚、上記には、ヒートシンク１４に第１の吸熱用リブ１９と第２の吸熱用リブ２５の双方が設けられた例を示したが、車輌用灯具１においては、第１の吸熱用リブ１９又は第２の吸熱用リブ２５の一方が設けられた構成にすることが可能である。また、ヒートシンク１４には三つ以上の吸熱用リブが設けられていてもよい。 In the above example, the heat sink 14 is provided with both the first heat absorbing rib 19 and the second heat absorbing rib 25, but in the vehicle lamp 1, the first heat absorbing rib 19 Alternatively, a configuration in which one of the second heat absorption ribs 25 is provided is possible. Also, the heat sink 14 may be provided with three or more heat absorbing ribs.
　さらに、上側に位置された第２の吸熱用リブが第１の吸熱用リブ１９と同様に櫛歯状に形成されてもよく、下側に位置された第１の吸熱用リブが第２の吸熱用リブ２５と同様に平板状に形成されてもよい。上側に位置された第２の吸熱用リブが櫛歯状に形成される場合には、突部がベース部から下方に突出される向きで櫛歯状に形成されることが望ましい。 Furthermore, the second heat absorbing rib positioned on the upper side may be formed in a comb-teeth shape like the first heat absorbing rib 19, and the first heat absorbing rib positioned on the lower side may be formed as the second heat absorbing rib. It may be formed in a flat plate like the heat-absorbing ribs 25 . When the second heat-absorbing rib positioned on the upper side is formed in a comb-teeth shape, it is preferable that the protrusions are formed in a comb-teeth shape in a direction protruding downward from the base portion.
　１…車輌用灯具、１０…導光体（光学部材）、１４…ヒートシンク、１５…基板取付部、１６…放熱フィン、１９…第１の吸熱用リブ、２０…ベース部、２１…突部、２２…突部、２３…突部、２４…突部、２５…第２の吸熱用リブ、２７…基板、２８…光源、２８Ａ…光源、２８Ｂ…光源、２８Ｃ…光源、２９…カバー部材、３２…空間 DESCRIPTION OF SYMBOLS 1... Vehicle lamp, 10... Light guide (optical member), 14... Heat sink, 15... Substrate attachment part, 16... Radiation fin, 19... First heat absorption rib, 20... Base part, 21... Protrusion, DESCRIPTION OF SYMBOLS 22... Protrusion 23... Protrusion 24... Protrusion 25... Second heat absorption rib 27... Substrate 28... Light source 28A... Light source 28B... Light source 28C... Light source 29... Cover member 32 …space

Claims (5)

  1. 　光源が搭載された基板と、
    　前記基板が取り付けられる基板取付部と前記基板取付部から突出された放熱フィンとを有するヒートシンクと、
    　前記光源から出射される光が入射される光学部品と、
    　前記光学部品における前記光源側の端部を覆うカバー部材とを備え、
    　前記ヒートシンクに前記基板取付部から前記基板側に突出され前記光源の点灯時に生じる熱を吸収する吸熱用リブが設けられた
    　車輌用灯具。     a substrate on which a light source is mounted;
    a heat sink having a board mounting portion to which the board is mounted and heat radiation fins protruding from the board mounting portion;
    an optical component into which light emitted from the light source is incident;
    a cover member covering an end portion of the optical component on the light source side;
    A vehicular lamp, wherein the heat sink is provided with heat-absorbing ribs projecting from the substrate mounting portion toward the substrate and absorbing heat generated when the light source is turned on.
  2. 　前記カバー部材と前記基板の間に前記光源が位置される空間が形成され、
    　前記空間に前記吸熱用リブが位置された
    　請求項１に記載の車輌用灯具。     a space in which the light source is positioned is formed between the cover member and the substrate;
    The vehicle lamp according to claim 1, wherein the heat absorbing rib is positioned in the space.
  3. 　前記光源が所定の方向に離隔して複数並んだ状態で位置され、
    　前記吸熱用リブに複数の前記光源の並び方向に延びるベース部と前記ベース部の各部からそれぞれ前記光源側に突出された複数の突部とが設けられた
    　請求項１又は請求項２に記載の車輌用灯具。     a plurality of the light sources are arranged in a row spaced apart in a predetermined direction;
    3. The heat-absorbing rib according to claim 1, wherein a plurality of base portions extending in a direction in which the light sources are arranged and a plurality of protrusions protruding from respective portions of the base portion toward the light sources are provided. Vehicle lighting.
  4. 　前記ベース部の長手方向における両端がそれぞれ前記複数の光源の並び方向における両端より外側に位置された
    　請求項３に記載の車輌用灯具。     4. The vehicular lamp according to claim 3, wherein both longitudinal ends of said base portion are located outside both longitudinal ends of said plurality of light sources.
  5. 　前記吸熱用リブとして第１の吸熱用リブと第２の吸熱用リブが設けられ、
    　前記第１の吸熱用リブと前記第２の吸熱用リブが前記光源を挟んだ反対側に位置された
    　請求項１、請求項２、請求項３又は請求項４に記載の車輌用灯具。     A first heat absorbing rib and a second heat absorbing rib are provided as the heat absorbing rib,
    5. The vehicle lamp according to claim 1, wherein said first heat absorbing rib and said second heat absorbing rib are positioned on opposite sides of said light source.
PCT/JP2022/036985 2021-10-15 2022-10-03 Vehicular lamp WO2023063147A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016095979A (en) * 2014-11-13 2016-05-26 市光工業株式会社 Vehicular lighting fixture
JP2020021665A (en) * 2018-08-02 2020-02-06 市光工業株式会社 Vehicle lamp fitting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016095979A (en) * 2014-11-13 2016-05-26 市光工業株式会社 Vehicular lighting fixture
JP2020021665A (en) * 2018-08-02 2020-02-06 市光工業株式会社 Vehicle lamp fitting

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