| 摘要 |
<p>A snap-action electric microswitch comprises a housing including a base portion (2) from which project a plurality of electric terminals (4, 6, 8), a lid portion (22), a snap-action mechanism (18) within the housing, a slidable operating plunger (24), a peripheral seal (30) between the lid portion (22) and the base portion (2), and a flexible cowl (26) reacting between the plunger (24) and the lid portion (22) whereby the plunger (24) is sealingly mounted in the lid portion (22). The lid portion (22), the plunger (24), and the cowl (26) and, preferably, the peripheral seal (30) are injection moulded to comprise an integral unit in which, during the injection moulding process, the cowl (26) is welded to both the lid portion (22) and the plunger (24), and the peripheral seal (30) is welded to the lid portion (22) whereby the switch consists of three readily-handled components - ie the base portion (2), the snap-action mechanism (18), and the integral lid portion (22), plunger (24), cowl (26) and peripheral seal (30). <IMAGE></p> |
