| 摘要 |
<p>The push-button assembly has a return spring for each button that also acts as an integral part of the contact rail. The contact rail has a connection part- with a solder point passing out of the casing- and a spring part comprising as many springs as there are push-buttons. The spring part is U-shaped and connected at one end to the connection part and at its other, free end lies on the contact piece of its push-button when the latter is on, thereby providing the wanted spring action. The advantage lies in fewer components and easy use.</p> |
