| 摘要 |
A hinge assembly includes a shaft ( 10 ), a follower ( 12 ), a cam ( 20 ), at least one rolling member ( 40 ), and a spring ( 50 ). The follower is connected with the shaft. One of the shaft and the follower has a securing portion ( 11 ). The cam is essentially in the shape of a cylinder. The cam has a cam surface ( 24 ) and has a cam hole ( 22 ) extending therethrough. The cam hole receives the shaft there through. Each rolling member is disposed between the follower and the cam. The first end of the urging means abuts the shaft, while an opposite second end of the urging means biases the cam. The cam surface of the cam is rotatably and movably engaged with each rolling member under the force of the spring.
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