| 摘要 |
<p>Keypad for telephone of the kind consisting of a two-part case, one of these parts 1 comprising sockets 4a receiving the keys 4, the latter being arranged so that each of them causes two contacts fitted onto a substrate 10 to be closed simultaneously, these contacts being installed by means of a number of modular supports 11 each consisting of two independent elements 15 and 22 which bear wafers 16 and 23 respectively, the keys 4 comprising two opposite protuberances 14 for the simultaneous closure of two contacts, said keys comprising internal means to restore them to their idle position, said means being formed with a pushing element 26 having an elastic action and reacting against the substrate 10.</p> |
