| 摘要 |
PROBLEM TO BE SOLVED: To provide a link mechanism for reducing the plastic deformation of a spring. SOLUTION: The link mechanism 10 includes link members 11, 12 as a pair of links, a rotating shaft 13 for connecting the links to each other in a relatively turnable manner, the torsion coil spring 14 for imparting elastic force to the links, the torsion coil spring 14 having two arms 14b, 14c, and spring pressers 15, 16 provided at the links for abutting on the arms 14b, 14c. An axis P of the rotating shaft 13 is set to deviate from the turning center Q of the torsion coil spring. At one arm 14c abutting on the movable side spring presser 16, a deformed portion 14d is formed which is bent to the turning direction of the link member 12 when turned to reduce a link angleβbetween the links. Accompanied by the turning operation of the links around the rotating shaft 13, an abutting position between the arm portion 14c on which the deformed portion 14d is formed and the movable side spring presser 16 is arranged movable through the deformed portion 14d to the front end side of the arm portion 14c. COPYRIGHT: (C)2011,JPO&INPIT
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