| 摘要 |
<p>A push button capable of surely performing the on and off operation thereof even when one contact fails while the push button is used and a teaching pendant using the push button, wherein two c-contacts (9a, 9b) having a snap action structure and switching mechanisms (11a, 11b) for opening and closing the c-contacts (9a, 9b) are installed in a switch case (3), whereby, when the push button (5) is pressed, the c-contacts (9a, 9b) are opened and closed simultaneously by the switching mechanisms (11a, 11b) to turn on and off the push button (1).</p> |
