| 摘要 |
PROBLEM TO BE SOLVED: To smoothly move a movable body and reduce an occupation space of assist means.SOLUTION: A movable performance device 150 includes: a first movable body 152 supported by a base body 151 so as to be movable between a first position and a second position; and assist means 241 that energizes the first movable body 152 from the second position to the first position side. The assist means 241 is a flat spiral spring including: a first end 243 located at an outer peripheral side of a wound part 242 that is formed by winding a spring steel into a spiral shape, connected to any one of the base body 151 and the first movable body 152; and a second end 244 located at a center side of the wound part 242, connected to the other of the base body 151 and the first movable body 152. When the first movable body 152 moves from the first position to the second position, the flat spiral spring 241 is elastically deformed to pull out the spring steel from the wound part 242, so as to energize the first movable body 152 to the first position side by restitutive force developing in the flat spiral spring 241.SELECTED DRAWING: Figure 12 |
