| 摘要 |
A hinge assembly ( 200 ) includes a retaining member ( 101 ), a fixing seat ( 5 ), a control member ( 6 ), a first spring ( 7 ), a follower ( 300 ), a cam ( 400 ), a second spring ( 9 ) and a shaft ( 20 ). The button has at least one pushing portion ( 31 ). The control member has at least one receiving groove ( 61 ), and the pushing portion is received in each receiving groove. Each pushing portion resists the control member. The first spring provides an elastic force to the control member. The cam includes an axis hole having an inner screw thread ( 4342 ). The second spring provides an elastic force to make the cam and the follower resist each other. The shaft defines an outer screw thread ( 233 ). The outer screw thread engages with the inner screw thread of the cam.
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