| 摘要 |
PURPOSE:To avoid a malfunction and at the same time ensure a smooth switching operation for a band change-over mechanism, by switching the bands with a pair of working plates. CONSTITUTION:The band change-over switch 7 is selecting the B band, and at the same time an optional operation member 1a for the A band is pressed. Thus a part 1' of the operation member acts on the inclined line of the cam bar 6a to move left the 1st working plate 3a. At the same time, the mover 7' is pressed toward the right via the operation bar 9. As a result, the switch 7 is changed from the B band to A. In accordance with this switching action, the cam bar 6b shifts up to the position where an effect is secured to the corresponding B-band operation member 1b. |
