| 摘要 |
<p>A switch assembly including a pushbutton key (40) having a first guide formation, a key surround (12) having a second complemental guide formation, an elastically deformable keymat (16), and locating means (62, 64) for locating the keymat relative to the surround, whereby the pushbutton key is arranged to travel reciprocally within the surround between a raised position and a depressed position, with the keymat being arranged to return the key to the raised position, and the first and second guide formations being arranged to restrict the key to a predetermined path throughout its reciprocal travel. The keymat typically includes a pushbutton key portion, an outer peripheral base (44) and an elastically deformable web (42) extending between the pushbutton key portion and the base, and constituting a return spring, for providing sprung movement between the pushbutton key portion and the base.</p> |
