Caster with a circularly positioning structure
AssigneeCatis Pacific Mfg. Corp. Ltd.
InventorChing Sung Lin
Life of this patent
Estimating the term…
Abstract
For a caster with a circularly positioning structure, stepping on the pedal can drive the driving rod and the driving piece to rotate, so that the positioning pin of the driving piece cyclically proceeds the first positioning point, the second positioning point and the path point of the positioning member, thereby driving the cam unit to push against the shaft to let the positioning piece and the orienting hole to be engaged or disengaged from each other, and let the locking end of the locking member to be engaged in or disengaged from the locking groove. In this way, the caster can selectively be locked to stop rotation, and be released to freely rotate.
Claims7
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.
Dependencies are inferred from the claim text.