| 摘要 |
PURPOSE:To eliminate a play existing in a slide part between a device frame and a cross arm by allowing an elastic free piece provided to an indirect plate to press into contact onto the device frame thereby providing unidirectional elastic pressure to the cross arm when a channel selection member is forwarded in the memory operation or the channel selection operation. CONSTITUTION:An operating piece 14 slid to the cross arm 4, 5 by pushbutton operation, a suppressing piece 12 tilted by the operating piece 13, a regulating plate 8 suppressed by the suppressing piece and a channel selection member B whose one end is fixed and whose free end is inserted between the regulating plate and the suppressing piece and provided with the indirect plate 11 having elasticity are equipped freely slidably to the front and rear plates of the device frame and pressing elastically the cross arms to the side direction when the channel selection member B is forwarded is provided to the indirect plate 11. Thus, a unidirectional elastic pressing force is given to the sliding part between the device frame and the cross arms 4, 5 to cancel a play existing in the slide part so as to improve the memory accuracy and the channel selection accuracy. |
