WO2023063147A1 - Lampe de véhicule - Google Patents

Lampe de véhicule 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
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WO
WIPO (PCT)
Prior art keywords
heat
light source
light
substrate
rib
Prior art date
Application number
PCT/JP2022/036985
Other languages
English (en)
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/fr

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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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

L'invention concerne une lampe de véhicule comprenant : un substrat sur lequel une source de lumière est montée ; un dissipateur thermique ayant une partie de fixation de substrat sur laquelle le substrat est fixé, et des ailettes de dissipation de chaleur faisant saillie à partir de la partie de fixation de substrat ; un composant optique dans lequel la lumière émise par la source de lumière entre ; et un élément couvercle qui recouvre une extrémité côté source de lumière du composant optique. Le dissipateur thermique a des nervures d'absorption de chaleur faisant saillie à partir de la partie de fixation de substrat vers le substrat pour absorber la chaleur générée lorsque la source de lumière est allumée.
PCT/JP2022/036985 2021-10-15 2022-10-03 Lampe de véhicule WO2023063147A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-169490 2021-10-15
JP2021169490 2021-10-15

Publications (1)

Publication Number Publication Date
WO2023063147A1 true WO2023063147A1 (fr) 2023-04-20

Family

ID=85988549

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/036985 WO2023063147A1 (fr) 2021-10-15 2022-10-03 Lampe de véhicule

Country Status (1)

Country Link
WO (1) WO2023063147A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016095979A (ja) * 2014-11-13 2016-05-26 市光工業株式会社 車両用灯具
JP2020021665A (ja) * 2018-08-02 2020-02-06 市光工業株式会社 車両用灯具

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016095979A (ja) * 2014-11-13 2016-05-26 市光工業株式会社 車両用灯具
JP2020021665A (ja) * 2018-08-02 2020-02-06 市光工業株式会社 車両用灯具

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