| 摘要 |
PROBLEM TO BE SOLVED: To simplify structure, to reduce the number of parts, to reduce machining time and cost of a manufacturing process and to facilitate operation of a user by providing a spindle, two lever parts, two connecting parts, two springs, two movable joints, a fixed joint and two fixed parts. SOLUTION: Joint devices are set on both ends of a spindle 10. A bolt 12 of the device is screwed in one end of a screw rod 11, and a lever part 13, a connecting part 14, a spring 15, a movable joint 16 and a fixed joint 17 are sequentially fit in the spindle 10. A fixing jacket pipe 172 to fix the device on a support body is provided on an outside of the fixed joint 17. Additionally, another movable joint 16A, a spring 15A, a connecting part 14A and a lever part 13A are sequentially fit in and assembled. The number of assembling parts is reduced, structure is simplified, production cost is reduced, time is shortened, and it becomes easier for a user to use it. |
