US 12,085,268 B2
Heat sink, separator, and lighting device applying same
Bishou Chen, Shanghai (CN); Ming Chen, Shanghai (CN); Shan Li, Shanghai (CN); Qi Li, Shanghai (CN); and Lili Zhao, Shanghai (CN)
Assigned to Shanghai Sansi Electronic Engineering Co. Ltd., Shanghai (CN); Shanghai Sansi Technology Co. Ltd., Shanghai (CN); Jiashan Sansi Optoelectronic Technology Co. Ltd., Zhejiang (CN); and Pujiang Sansi Optoelectronic Technology Co. Ltd., Zhejiang (CN)
Filed by Shanghai Sansi Electronic Engineering Co. Ltd., Shanghai (CN); Shanghai Sansi Technology Co. Ltd., Shanghai (CN); Jiashan Sansi Optoelectronic Technology Co. Ltd., Jiaxing (CN); and Pujiang Sansi Optoelectronic Technology Co. Ltd., Jinhua (CN)
Filed on Oct. 30, 2023, as Appl. No. 18/385,364.
Claims priority of application No. 202211357895.5 (CN), filed on Nov. 1, 2022; and application No. 202222898917.0 (CN), filed on Nov. 1, 2022.
Prior Publication US 2024/0142098 A1, May 2, 2024
Int. Cl. F21V 29/75 (2015.01); F21Y 113/00 (2016.01)
CPC F21V 29/75 (2015.01) [F21Y 2113/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heat sink, comprising:
a housing, symmetrical with respect to an axis, wherein the housing has a first open end and a second open end along the axis, and a holding cavity connecting the first open end and the second open end;
wherein the housing comprises a first portion and a second portion, both symmetrically formed around the axis, wherein the first portion comprises a plurality of device mounting portions symmetrically disposed around the axis; wherein the second portion comprises fin structures; wherein the fin structures comprise an outer fin set disposed around the axis in an outer peripheral region, and an inner fin set disposed around the axis in an inner peripheral region inside the outer peripheral region; wherein the first portion is closer to the first open end than the second portion is to the first open end, and the outer fin set extends toward the second open end; wherein outer fins of the outer fin set and inner fins of the inner fin set extend toward the axis that passes through the holding cavity, and the inner fins extend deeper into the holding cavity than the outer fins, so as to partially block airflow parallel to the axis.