Light-emitting device

Patent metadata

Field	Value
Publication number	US-9689557-B2
Application number	US-201214131624-A
Country	US
Kind code	B2
Filing date	Jun 4, 2012
Priority date	Jul 8, 2011
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A light-emitting device having a cover ( 1 ), a heat sink ( 2 ) and a light-emitting assembly ( 3 ), wherein the heat sink ( 2 ) has at least one first locking part (a), the cover ( 1 ) has at least one second locking part (b) corresponding to the first locking part (a), the second locking part (b) engages with the first locking part (a) to form an enclosed cavity ( 5 ) for the light-emitting assembly ( 3 ), and the second locking part (b) has a pressing part (b 1 ) pressing the light-emitting assembly ( 3 ) against the heat sink ( 2 ).

First claim

The invention claimed is:

1. A light-emitting device comprising:
a heat sink having at least one first locking part, a planar mounting part, and two outer edges located proximate two sides of the mounting part, the at least one first locking part being shaped so as to form at least one locking slot between the mounting part and one of the two outer edges, the at least one locking slot having a planar inward bending part at an end of the at least one locking slot extending away from one of the outer edges of the heat sink, the inward bending part being parallel to the mounting part;
a cover formed of an elastic, optically transparent material having at least one elastically deformable second locking part along an edge of the cover; and
a light-emitting assembly mounted onto the mounting part,
wherein the at least one second locking part pressingly engages with the at least one first locking part to form an enclosed cavity for the light-emitting assembly so that an entirety of the at least one second locking part is on a cavity side of the at least one first locking part,
wherein the at least one second locking part has a pressing part pressing the light-emitting assembly in a first direction against the mounting part of the heat sink,
wherein the at least one second locking part has a supporting part pressing the at least one second locking part against a first surface of the inward bending part of the at least one first locking part in a direction opposite to the first direction, the supporting part being disposed entirely in the at least one locking slot, the at least one second locking part having a counter connecting edge contacting a second surface of the inward bending part opposite the first surface of the inward bending part, and
wherein the at least one second locking part has a first recessed arc-shaped part forming the pressing part, and wherein the at least one second locking part has a second recessed arc-shaped part forming the supporting part, the first recessed arc-shaped part and the second arc-shaped part being directly connected to one another to form an S-shape in cross-section.

2. The light-emitting device according to claim 1 , wherein the at least one second locking part is a bending locking segment that is received in the locking slot.

3. The light-emitting device according to claim 2 , wherein the pressing part is a protruding elastic bending part of the at least one second locking part.

4. The light-emitting device according to claim 2 , comprising two second locking parts on opposite sides of the mounting part, and wherein a side surface of the mounting part defining the locking slot extends obliquely outward and forms a clamping convex point together with a mounting surface of the mounting part, and each second locking part has an end thereof formed with a clamping part acting on the clamping convex point and each second locking part applies clamping force toward the other second locking part.

5. The light-emitting device according to claim 4 , wherein the supporting part is between the pressing part and the clamping part to be against an inner surface of the inward-bending part.

6. The light-emitting device according to claim 1 , wherein respective first locking part has a first contact surface and a second contact surface capable of interacting with corresponding second locking part, wherein an angle defined between the first contact surface and the second contact surface is less than 90°.

7. The light-emitting device according to claim 6 , wherein the angle defined between the first contact surface and the second contact surface is 45°.

8. The light-emitting device according to claim 6 , wherein respective second locking part comprises:
a third contact surface contacting the first contact surface,
a fourth contact surface contacting the second contact surface, and
a top surface contacting the light-emitting assembly.

9. The light-emitting device according claim 8 , wherein a sum of vertical components of the clamping forces is equivalent to a pressure applied by the cover to the light-emitting assembly.

10. The light-emitting device according to claim 1 , wherein the heat sink is made of a thermal conducting metal.

11. The light-emitting device according to claim 1 , wherein a thermal conducting pad is positioned between the heat sink and the light-emitting assembly.

12. The light-emitting device according to claim 1 , wherein the light-emitting assembly comprises a circuit board and a light source mounted on the circuit board.

13. The light-emitting device according to claim 1 , wherein the at least one first locking part is formed of an inelastic material.

Assignees

• Chen Peng
• Li Hao
• Liu Tingming
• Zheng Shengmei
• Osram Gmbh

Inventors

• Chen Peng
• Li Hao
• Liu Tingming
• Zheng Shengmei

Classifications

• F21Y2103/10

  comprising a linear array of point-like light-generating elements · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V29/76

  with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section · CPC title

• F21V3/0436

  Mechanical Engineering · mapped topic

• F21S4/28

  rigid, e.g. LED bars · CPC title