| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a dedicated piano handle every mounting position and reduce fabrication work by providing plurality of operation pieces provided along sliding direction of a display body, respective lower faces being inclined diagonally, and a driving piece or the like for sliding the display body in one direction by imparting pressing force to any of the operation piece lower faces due to one directional turning of a reversing handle. SOLUTION: In a drive state of a display body 70, when a piano handle 43 is pressed and operated, a reversing handle 31 turns, and a top end of a drive piece 71 integrally provided at the reversing handle 31 raises, and is pushed to an inclined operation face 70c in abutment. As a result, the display body 70 is guided to the operation face 70c and moved, and a surface position of the display body 70 opposite to a display window 76a changes. Therefore, regardless of a position relationship between a push button switch 5 and the piano handle 43, the driving piece 71 abuts with a lower faces of a plurality of operation pieces 70b provided at the display body 70, pressing force is imparted, and even if the common piano handle 43 is mounted to the push button switch 5 at any of the top, middle, and bottom positions, contact switch display is made possible.
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