| 摘要 |
A normally closed electrical switch (10) includes a first circuit board (12) having a first switch contact (22) thereon and an aperture (26) therethrough near the first switch contact. A second, flexible circuit board (14) has a second switch contact (28) aligned with the first switch contact of the first circuit board. A spacer sheet (16) separates the first and second circuit boards (12,14) and has an aperture (38) in registry with the aperture in the first circuit board. The switch contacts (22,28) extend toward each other through the aperture (38) in the spacer sheet (16) such that they are in normally closed condition. A movable cover (18) is provided on the first circuit board at least over the aperture therein. An actuator (50) is operatively associated with the cover and extends through the aperture (26) in the first circuit board (12), through the aperture (38) in the spacer sheet (16) and engageable with the second, flexible circuit board (14) for flexing the second circuit board and opening the switch contacts (22,28) in response to movement of the cover. <IMAGE>
|
