| 摘要 |
An exemplary hinge assembly includes a shaft, a cam, a pin, a follower, a shift member, a socket, a first spring, and a second spring. A pinhole is defined in the shaft. The cam, the follower, and the shift member are rotatably sleeved on the shaft. The cam has a cam surface and a spiral slot. The pin is disposed in the pinhole and the spiral slot. The follower has an anti-rotating portion and a cam surface for engaging with the cam surface of the cam. The shift member has a controlling portion for slidably engaging with the anti-rotating portion. The first and the second spring are sleeved on the shaft. An end of the first spring resists the follower and another end of the first spring resists the shift member. An end of the second spring resists the follower and another end of the second spring resisting the socket.
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