| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that, when a spring is compressed in changing a position, the spring may cause bending deformation inside a guide groove by inclination, repetitive pressing or the like in assembling. <P>SOLUTION: The operation unit includes: a ball member; a recessed member having recesses corresponding to each of a plurality of stationary positions; a spring member energizing the ball member to a recess; and a guide member for guiding the spring member and the ball member in the direction of the recess. The guide member has a relief for preventing the bending deformation of the spring member when the ball member transfers to another recess. <P>COPYRIGHT: (C)2013,JPO&INPIT |
