# US 8,770,781 B2 · Lighting apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,781 B2 - Document ID: US8770781B2 - Status: Granted - Kind: B2 - Application number: 13/377,192 - Filed: 2010-06-03 - Published: 2012-04-05 - Granted: 2014-07-08 - Earliest claimed: 2009-06-10 - Assignees: Sharp Kabushiki Kaisha - Applicants: Hiroyuki Yamamoto; Osamu Bando; Noritaka Okamura - Inventors: Hiroyuki Yamamoto; Osamu Bando; Noritaka Okamura - Web page: https://patentgrep.com/patent/US8770781B2 ## CPC - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling} - F21V 21/04: Recessed bases - F21V 29/507: of means for protecting lighting devices from damage, e.g. housings - F21V 29/74: with fins or blades - F21V 29/76: with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section - F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract It is expected to provide a lighting apparatus that can improve the radiation performance. In a lighting apparatus that includes a light source unit and a heat sink radiating the heat generated by the light source unit and is recessed and installed to an attaching hole opened on a mounted portion, the heat sink is exposed at least partially to a side where the light from the light source unit is emitted from the attaching hole. For example, when installed to a ceiling having a heat insulated structure, the heat generated by the light source unit and transferred to the heat sink is transferred inside the heat sink and radiated from one part to the air at the side where the light from the light source unit is emitted from the attaching hole. Therefore, the radiation performance can be improved. ## Claims ### Claim 1 A recessed lighting apparatus that emits light in a predetermined direction, comprising: a light source that generates the light; a radiator that radiates heat generated by the light source; a terminal block that is connected to plural electric wires for supplying power or signal; and plural mounting members, wherein a part of the radiator is exposed in a direction opposite to the predetermined direction, a direction for connecting the plural electric wires to the terminal block is substantially equal to a direction from the terminal block to at least one of the plural mounting members, the terminal block is configured with a first terminal block portion and a second terminal block portion, the first terminal portion is connected to an electric wire having a higher rigidity than an electric wire connected to the second terminal portion, and a direction from the first terminal block portion to the second terminal block portion is substantially equal to the predetermined direction. ### Claim 2 (depends on 1) A recessed lighting apparatus according to claim 1, wherein the recessed lighting apparatus is recessed to be utilized into an attaching hole. ### Claim 3 (depends on 2) A recessed lighting apparatus according to claim 2, wherein the part of the radiator comprises a flange. ### Claim 4 (depends on 3) A recessed lighting apparatus according to claim 3, wherein the radiator comprises a plate shaped portion, and the light source is arranged on one surface of the plate shaped portion. ### Claim 5 (depends on 4) A recessed lighting apparatus according to claim 4, wherein the radiator comprises a cylindrical shaped portion, the flange is arranged at one end side of the cylindrical shaped portion. ### Claim 6 (depends on 5) A recessed lighting apparatus according to claim 5, further comprising: a power supply unit that drives the light source, wherein the plate shaped portion separates an internal space of the recessed lighting apparatus into a first space containing the one surface and a second space containing an opposite surface of the plate shaped portion opposite to the one surface, and the power supply unit is arranged in the second space. ### Claim 7 (depends on 6) A recessed lighting apparatus according to claim 6, wherein the power supply unit is thermally connected to the radiator. ### Claim 8 (depends on 5) A recessed lighting apparatus according to claim 5, wherein each of the plural mounting members extends in a radial direction of the cylindrical shaped portion, and the plural mounting members are spaced apart equally in a circumferential direction of the cylindrical shaped portion. ### Claim 9 (depends on 8) A recessed lighting apparatus according to claim 8, wherein a direction for connecting the electric wire to the terminal block is substantially equal to a direction from the terminal block to a center in a radial direction of the recessed lighting apparatus. ### Claim 10 (depends on 9) A recessed lighting apparatus according to claim 9, wherein the first terminal block portion is for supplying power to the light source, and the second terminal block portion is for dimming the light generated by the light source. ### Claim 11 (depends on 8) A recessed lighting apparatus according to claim 8, wherein the plural mounting members, except for a mounting member arranged opposite to the terminal block, are arranged symmetrically. ### Claim 12 (depends on 8) A recessed lighting apparatus according to claim 8, wherein a number of the plural mounting members is three. ### Claim 13 (depends on 8) A recessed lighting apparatus according to claim 8, wherein each of the plural mounting members is a leaf spring. ### Claim 14 (depends on 5) A recessed lighting apparatus according to claim 5, wherein the flange and the cylindrical shaped portion are formed integrally. ### Claim 15 (depends on 2) A recessed lighting apparatus according to claim 2, wherein the radiator comprises a cylindrical shaped portion, and each of the plural mounting members extends in a radial direction of the cylindrical shaped portion, and the plural mounting members are spaced apart equally in a circumferential direction of the cylindrical shaped portion.