| 摘要 |
A stopper projects radially outward from the periphery of a rotary turn table and a plurality of selection poles are disposed such that any one of the selection poles, when depressed, projects into the locus of rotation of the stopper. A spring fabricated to have energizing pieces, the same in number as the number of selection poles, is positioned within a casing so that two mating parts can engage with each other. Each energizing piece is made electrically conductive and the spring also urges each selection pole toward the outside of the casing. A metal guide plate holds the selection poles 16 which are disposed along the periphery of the turn table within the casing and further guides the selected selection pole into the locus of rotation of the stopper. The selected selection pole will urge corresponding spring into engagement with the guide plate. Each selection pole is provided with a projection which urges the spring into contact with the metal guide plate when any one of the selection poles is depressed from outside of the casing. Furthermore, a circuit between a motor and a power source is connected to both the metal spring and the metal guide plate to cause these two parts to act as a pair of mating contacts in a selection switch. |
