| 摘要 |
A pivot joint includes a fixed member, a movable member, two friction pads respectively fastened to the fixed member and the movable member and each having at least one raised portion and one recessed portion formed at its one side, and a pivot shaft inserted through the fixed member, the movable member, and the two friction pads to tightly hold the same by its two ends. The two sides of said two friction pads having the raised and recessed portions are attached to each other. When the movable member is driven by a force to turn with respect to the fixed member for a predetermined angle, the friction pad fastened to the movable member is turned together with the movable member, such that friction resistance is increasingly generated between said raised portions of said friction pads.
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