| 摘要 |
The switch includes a novel electrically-conductive spring (2) formed in part, by stretching and located between an electrically-insulating cover plate (6), e.g. made of glass, glass-ceramic, or plastics material, and a carrier plate (8) in the form of a circuit board on which sensing circuitry is mounted. The spring contacts the underside (5) of the cover plate, where it forms a sensor surface (15). The lower end of the spring presses against a contact (9) area on the circuit board and is soldered in place. The spring may be circular or oval in form and the area between the turns may house a light source such as an LED or filament lamp. An independent claim is included for a pressure spring for use in a capacitive switch according to the invention. |
