| 摘要 |
The present invention is an adjustable sleeve barrel structure comprising of a sleeve head, a sleeve body, and a set of pawls. The sleeve head is coupled on the bottom with the sleeve body, and both of them can rotate freely. The sleeve body has multiple slide rails distributed on its inner wall evenly. The pawls slide in these slide rails, and the shafts on the top of these pawls extrude to the space designed between the sleeve head and the sleeve body. Connected to the shafts are corresponding connecting rods, which have corresponding pins fixed onto the sleeve head. When the sleeve head rotates, it drives the pawls through the connecting rods to open/close simultaneously. In this way, when the operator turn the sleeve barrel clockwise/anti-clockwise, the pawls will screw a nut down/up together, which is convenient and practical.
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