US 12,443,097 B2
Projection lens module
Wen-Yen Chung, Hsin-Chu (TW); and Chun-Ting Lin, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Dec. 20, 2022, as Appl. No. 18/085,550.
Claims priority of application No. 202111576752.9 (CN), filed on Dec. 22, 2021.
Prior Publication US 2023/0194971 A1, Jun. 22, 2023
Int. Cl. G03B 21/16 (2006.01); G03B 21/20 (2006.01); G03B 21/28 (2006.01)
CPC G03B 21/16 (2013.01) [G03B 21/2066 (2013.01); G03B 21/28 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A projection lens module, comprising:
a lens assembly, having an optical axis;
a reflector, disposed on the optical axis of the lens assembly to reflect a light beam transmitted by the lens assembly, wherein the reflector comprises a reflective surface and a shady surface opposite to each other;
a housing, covering the reflector, and comprising a first part and a second part, wherein the second part comprises an air inlet and an air outlet, the first part and the reflective surface of the reflector jointly define an enclosed space, and the second part and at least a part of the shady surface of the reflector jointly define an air guiding space;
a light shading structure, extending from the housing and located besides the air outlet, wherein the light shading structure overlaps the air outlet in a direction of the optical axis;
a fan, disposed outside the housing; and
an air guiding element, connected to the fan and the air inlet of the housing, to guide wind blown by the fan to the at least a part of the shady surface to leave from the air outlet.