US 12,377,680 B2
Caster with a circularly positioning structure
Ching Sung Lin, Yunlin County (TW)
Assigned to Catis Pacific Mfg. Corp. Ltd., Douliou (TW)
Filed by CATIS PACIFIC MFG. CORP. LTD., Yunlin County (TW)
Filed on Oct. 7, 2022, as Appl. No. 17/938,845.
Prior Publication US 2024/0116311 A1, Apr. 11, 2024
Int. Cl. B60B 33/00 (2006.01)
CPC B60B 33/0084 (2013.01) [B60B 33/0049 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A caster with a circularly positioning structure, comprising:
a driving assembly including a driving rod pivotally connected to a bracket, and a driving piece fixed on the driving rod, and the driving piece including a protruding portion and a positioning pin disposed on the protruding portion;
a positioning member including:
a pivoting portion pivotally connected to the bracket through a pivot rod;
a first positioning portion protruding toward the driving piece;
a second positioning portion connected to the first positioning portion and the pivoting portion, and the second positioning portion including a guiding slope inclined toward the bracket; and
a third positioning portion that is connected to the pivoting portion and the second positioning portion, wherein periphery of the positioning member includes a first positioning point located between a side of the first positioning portion that is closer to the pivot rod, and a side of the pivoting portion, a second positioning point located between the second positioning portion and the first positioning portion, and a path point located between the third positioning portion and the second positioning portion;
an elastic member sleeved on the pivot rod, one of two opposite ends of the elastic member being fixed to the bracket, and the other one of the two opposite ends of the elastic member being fixed to the positioning member;
a cam unit including a cam fixed to the driving rod, the cam including a first positioning portion and a second positioning portion recessed from an edge thereof, the first positioning portion including a first bottom surface, and the second positioning portion including a second bottom surface, wherein a distance between the first bottom surface and the driving rod is greater than a distance between the second bottom surface and the driving rod, and the cam unit further includes an abutting member continuously abutting against the cam;
a shaft connected to the abutting member;
an orienting unit including an orienting member sleeved on and fixed to the shaft, and a positioning piece sleeved on the shaft and movable with the shaft, the orienting member including an orienting hole for insertion of the shaft, and the positioning piece including a clamping portion protruding from a peripheral edge thereof; and
a caster assembly fixed to the driving assembly.