US 12,306,520 B2
Rotary optical module and projection apparatus
Te-Ying Tsai, Hsin-Chu (TW); and Ming-Feng Hou, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Sep. 27, 2022, as Appl. No. 17/953,337.
Claims priority of application No. 202122483323.9 (CN), filed on Oct. 15, 2021.
Prior Publication US 2023/0119101 A1, Apr. 20, 2023
Int. Cl. G03B 21/20 (2006.01)
CPC G03B 21/204 (2013.01) 20 Claims
OG exemplary drawing
 
1. A rotary optical module, comprising a drive device, an optical turntable, a balance ring, at least one counterweight device, and a plurality of protruding structures, wherein:
the drive device comprises a rotary axis extending along a first direction;
the optical turntable is sleeved on the rotary axis of the drive device;
the balance ring is sleeved on the rotary axis of the drive device, the balance ring is located between the drive device and the optical turntable, the balance ring comprises an outer retaining wall, and the outer retaining wall is located at an edge of the balance ring;
the at least one counterweight device is disposed on the balance ring, and the at least one counterweight device abuts against an inner side of the outer retaining wall; and
the plurality of protruding structures are radially arranged on the balance ring with the rotary axis as a center, wherein a height of the plurality of protruding structures in the first direction is greater than a height of the outer retaining wall in the first direction.