| 摘要 |
A hinge mechanism for joining a cover ( 5 ) to a main housing ( 4 ) of a foldable radiotelephone includes a rotation assembly ( 1 ). The rotation assembly includes a hollow connecting member formed by two casings ( 13 ) each having two slots ( 131 ), two shafts ( 12 ), and an elastic member ( 11 ) with two end hooks ( 111 ), the elastic member being received in the connecting member. The shafts are received through the hooks and through holes cooperatively formed by the slots, and are engaged in the cover and the main housing. The rotation assembly thus pivotably connects the cover to the main housing. The shafts are slidable along the holes. When the cover is manually opened, the shafts slide and stretch the elastic member. When the cover reaches a predetermined angle, the elastic member rebounds and drives the shafts to slide in opposite directions, whereby the cover is automatically further opened.
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