| 摘要 |
In a hosuing is contained a manual, longitudinally movable compression member with a resetting spring. It is connected to a simultaneously movable slider with two actuating inclines and two interrupters sequentially operated by the inclines on a given movement of the compression member. The coacting between the inclines and the interrupters can be felt by the operator via sequential, non-progressive ridges. The plunger (4) of the compression member cooperates laterally with retaining members (22,23) which, after a given path (c) exert a longitudinal force, opposing that of the resetting spring (5). The retaining members obtain a progressively increasing force from a compensation spring (28), compressed by push-down of an actuating head (15), thus relieving the manual action.
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