| 摘要 |
PURPOSE:To get rid of both gaps between the channel selector part and the unit frame, and gaps of the movable part, by providing a part which moves to the confronted direction by operation, and a point of application which causes the same component of force to its part. CONSTITUTION:When the butt part 4 collides against the movable part 11 at the point 17 by operating the push-button 9, the movable part 11 moves to the left, and the movable part 11' moves to the right until the butt part 4' collides against the point 17'. The push-button is pressed down until the two butt parts collide against the movable parts 11, 11' and stop the movement. And the confronted moving distance of the movable part is set by relation to the butt part. A fixed tuning can be performed by mounting a tuner 16 to the movable part 11'. Furthermore, the same force is produced in the same direction in the butt end when it is pressed down, therefore since the whole arm part 2 is pushed in the same direction, no gaps are caused, and no gaps are caused by receiving the same force. between the movable part and the rotary link 13, too. |
