| 摘要 |
A free positioning hinge is especially used to a notebook computer, an electronic dictionary, a personal digital assistant, etc. for opening covers of these devices, or is used to a rear view mirror of a car. The free positioning hinge is formed by pivotally engaging a rotary shaft with a sleeve. The sleeve is formed by a plurality of stacking closed pads. Each pad has an axial hole. A hollow neck extends from the axial hole and two hollow shoulders are extended from the neck, thereby, two flexible arm portions being formed between the axial hole, the two shoulders, and the neck. The friction surface of the sleeve has a preferred flexibility so that it is difficult to damage the components assembled thereto. Furthermore, oil stored in the holes may provide a proper lubrication ability so as to prolong the lifetime of the device.
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