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US 2008/0166180 A1Published application
Pivotal device
AssigneeShin Zu Shing Co., Ltd.
InventorsJamie Horng, Chun-Min Wang
Life of this patent
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Abstract
A pivotal device is mounted between a cap and a base of an electronic appliance, and has a resisting washer and an actuating washer rotated relative to each other. The resisting washer has an arcuate skewed surface formed in a side facing to the actuating washer and the actuating washer has lugs formed in a side and sliding along the skewed surface. With the coordination of the lugs and skewed surface, the cap has an enhancing friction when the cap is closing relative the base. Furthermore, the cap has a decreasing friction when the cap is opening relative to the base.
Claims7
A pivotal device comprising:
- an axle;
- a bracket mounted around the axle;
- a resisting washer mounted around the axle and attached securely to the bracket and having
- a first side facing to the bracket;
- a second side opposite to the first side;
- and
- an arcuate skewed surface formed on the first side;
- an actuating washer mounted securely on the axle, adjacent to the resisting washer and having two lugs extending towards the resisting washer and corresponding to the skewed surface of the resisting washer;
- an elastic unit mounted around the axle;
- a friction washer mounted the axle;
- and
- a fastener mounted securely on an end of the axle.
9 more elements
Dependencies are inferred from the claim text.