| 摘要 |
<p>1. A push-button (2) for a control keyboard comprising at least one pair of electric contacts (23, 24) which are integral with a support piece (15) and which are brought into contact with a printed circuit (3) by depressing the push-button (2), a body of a button constituted by a piston (6) sliding in a cover (11), the cover having a magnetic surface (13) which co-operates with a metal backing plate (14) integral with the piston (6) to constitute a magnetic push-button (2) return device, characterized in that the electric contact (23, 24) support piece (15) and the metal backing plate (14) are assembled on the piston (6) of the push-button by a moulding process.</p> |
