| 摘要 |
A keytop levelling mechanism for use in conjunction with a keytop having a main portion and a stem portion cantilevered from the main portion, e.g., an L-shaped keytop. When pressed, the keytop actuates a keyswitch mounted on a circuit board. The levelling mechanism comprises a pair of lever arms joined at intermediate portions thereof by a pivot to form a scissors-like linkage. The scissors-like linkage is mounted between the stem portion of the keytop and the circuit board in a manner such that it collapses in scissor-like fashion when the keytop is pressed toward the circuit board. In this manner, the scissor-like linkage maintains the keytop level throughout its movement toward and away from the circuit board.
|
