| 摘要 |
A hinge apparatus for portable electronic devices such as portable telephones and handheld personal computers can be manufactured with a small and simple structure at a low cost. The hinge apparatus has a shaft with a flange, a cam engaged with an end of the shaft and; a slide cam engaged with the shaft between the cam and the flange. The slide cam is rotatably with the shaft and slidably in an axial direction. A compression spring is rolled around the shaft, and elastically provided between the slide cam and the flange. The cam has a pair of projections on one side surface at opposite positions, and the slide cam has cam members press-contacted with the projections. Otherwise, provided is a hinge apparatus which connects a microphone and a earphone of a portable telephone. The hinge apparatus comprises: a shaft having a flange with a rotation stopper, fixed in a hole provided at an attachment member in an axial direction provided at an end of the microphone or earphone, at one end; a cam having a rotation stopper, holding the shaft rotatably inserted through an insertion hole provided in a central axis direction of the shaft, engaged with the other end of the shaft, and fixed in a hole provided at an attachment member in the axial direction at an end opposite to the end where the flange is fixed; a slide cam, provided between the cam and the flange, engaged with the shaft inserted through a central portion, rotatably with the shaft and slidably in the axial direction; and a compression spring rolled around the shaft, and elastically provided between the slide cam and the flange. The cam has a pair of projections on one side surface at opposite positions, and the slide cam has cam members press-contacted with the projections.
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