# US 11,441,767 B2 · Lamp unit and power supply attachment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,767 B2 - Document ID: US11441767B2 - Status: Granted - Kind: B2 - Application number: 17/609,200 - Filed: 2020-05-01 - Published: 2022-06-30 - Granted: 2022-09-13 - Earliest claimed: 2019-05-07 - Assignees: Koito Manufacturing Co., Ltd. - Applicants: Koito Manufacturing Co., Ltd. - Inventors: Takashi Matsunaga; Yuji Sugiyama; Yukio Nomura - Web page: https://patentgrep.com/patent/US11441767B2 ## CPC - F21S 41/192: {Details of lamp holders, terminals or connectors} - F21V 29/508: of electrical circuits - F21S 41/147: the main emission direction of the LED being angled to the optical axis of the illuminating device - F21S 41/255: Lenses with a front view of circular or truncated circular outline - F21S 41/295: {specially adapted to projection lenses} - F21S 41/32: Optical layout thereof - F21S 41/321: {the reflector being a surface of revolution or a planar surface, e.g. truncated} - F21S 41/39: Attachment thereof (achieving variable light distribution by movable reflectors F21S41/675) - F21S 41/689: Flaps, i.e. screens pivoting around one of their edges - F21S 45/47: Passive cooling, e.g. using fins, thermal conductive elements or openings - F21V 23/003: {the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array} - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR ## Abstract A lamp unit includes: a light emitting element; a reflector that reflects light emitted from the light emitting element toward a unit front; and a heat sink that supports the light emitting element and the reflector, in which a power supply attachment for supplying power to the light emitting element is attached to the heat sink, the power supply attachment is fastened to the heat sink at two left and right positions of the power supply attachment, and a connector portion of the power supply attachment is formed inside two left and right fastening positions so as to extend to a unit rear side relative to a rear end position of the reflector. ## Claims ### Claim 1 A lamp unit comprising: a light emitting element; a reflector that reflects light emitted from the light emitting element toward a unit front; a heat sink that supports the light emitting element and the reflector; and a power supply attachment for supplying power to the light emitting element that is attached to the heat sink and includes a connector portion, wherein the power supply attachment is fastened to the heat sink at two left and right fastening positions of the power supply attachment, and the connector portion of the power supply attachment is formed inside the two left and right fastening positions so as to extend to a unit rear side relative to a rear end position of the reflector. ### Claim 2 (depends on 1) The lamp unit according to claim 1, wherein the connector portion is formed so as to open toward a unit rear. ### Claim 3 (depends on 1) The lamp unit according to claim 1, wherein the connector portion is formed so as to protrude toward a reflector side on the unit rear side relative to the rear end position of the reflector. ### Claim 4 (depends on 1) The lamp unit according to claim 1, wherein the connector portion is formed at a center position of the two left and right fastening positions. ### Claim 5 (depends on 1) The lamp unit according to claim 1, wherein the reflector is fastened to the heat sink at two left and right positions of the reflector, and a contact portion that is in contact with the heat sink is formed at a portion of the reflector positioned on the unit rear side relative to the two left and right fastening positions. ### Claim 6 (depends on 1) The lamp unit according to claim 1, wherein the light emitting element is mounted on an upper surface of the heat sink, and the upper surface of the heat sink is formed by an inclined surface in which a region on which the light emitting element is mounted is inclined downward toward the unit rear. ### Claim 7 A lamp unit comprising: a light emitting element; a reflector that reflects light emitted from the light emitting element toward a unit front; a heat sink that supports the light emitting element and the reflector; and a power supply attachment for supplying power to the light emitting element that is attached to the heat sink, wherein the reflector is fastened to the heat sink at two left and right positions of the reflector, the power supply attachment includes an opening formed so as to surround the light emitting element, and a connector portion that accommodates a terminal portion electrically connected to an external power source, the connector portion of the power supply attachment is positioned inside two left and right fastening positions of the reflector, and the two left and right fastening positions of the reflector are set to positions overlapping the opening of the power supply attachment with respect to a unit front-rear direction. ### Claim 8 (depends on 7) The lamp unit according to claim 7, wherein the power supply attachment is fastened to the heat sink at two left and right positions of the power supply attachment, and the two left and right fastening positions of the reflector are set on a unit front side relative to two left and right fastening positions of the power supply attachment. ### Claim 9 (depends on 7) The lamp unit according to claim 7, wherein the reflector includes a first contact portion that is in contact with the heat sink at a portion of the reflector that is positioned on a unit rear side relative to the two left and right fastening positions of the reflector. ### Claim 10 (depends on 7) The lamp unit according to claim 7, further comprising: a projection lens that allows reflective light from the reflector to be incident on the unit front side relative to the light emitting element, and a lens holder that supports the projection lens, wherein the reflector includes a second contact portion that is in contact with the lens holder at a portion of the reflector that is positioned on the unit front side relative to the two left and right fastening positions of the reflector. ### Claim 11 (depends on 7) The lamp unit according to claim 7, wherein the light emitting element is mounted on an upper surface of the heat sink, and the upper surface of the heat sink is formed by an inclined surface in which a region on which the light emitting element is mounted and a region on which the reflector is fastened are inclined downward toward the unit rear. ### Claim 12 A power supply attachment for supplying power to a light emitting element and in which a pair of bus bar electrodes are embedded in an insulating member in a state where a part of the bus bar electrodes is exposed, wherein a pair of first terminal portions electrically connected to the light emitting element and a pair of second terminal portions electrically connected to an external power source are formed by an exposed portion of the pair of bus bar electrodes from the insulating member, an opening that exposes the pair of first terminal portions and the connector portion that accommodates the pair of second terminal portions are formed in the insulating member, and the pair of second terminal portions are disposed side by side in a horizontal direction in an internal space of the connector portion. ### Claim 13 (depends on 12) The power supply attachment according to claim 12, wherein the connector portion is formed at a position overlapping the opening with respect to a first direction in which the pair of second terminal portions are disposed side by side. ### Claim 14 (depends on 12) The power supply attachment according to claim 12, wherein each of the pair of second terminal portions is formed in a plate shape, and a plate surface faces a second direction orthogonal to the first direction in which the pair of second terminal portions are disposed side by side. ### Claim 15 (depends on 12) A lamp unit comprising: the power supply attachment according to claim 12; an optical member that controls light emitted from the light emitting element; and a heat sink that supports the light emitting element, the power supply attachment, and the optical member, wherein a recessed portion that accommodates at least a part of the connector portion is formed in the heat sink. ### Claim 16 (depends on 15) The lamp unit according to claim 15, wherein an engagement hole that engages the connector portion with a connector on an external power source side is formed in an upper wall portion of the connector portion.