| 摘要 |
A drive device includes a cam disk (18), which, for switching on the power switch, can be driven by means of an energy store, impulsively, in a direction of rotation (D). A first section (48) of the curve path (20) of the cam disk (18), which, as the azimuth increases counter to the direction of rotation (D), exhibits an increasing radius, is adjoined by an intermediate section (50) of steadily decreasing radius. After this intermediate section (50) there follows a second section (52), running roughly in the radial direction. As a result of the interaction of the first section (48) with the roller (22'), the triangular lever (76), together with the control shaft (26), moves counter to the direction of rotation (D) out of the switch-off setting into the switch-on setting and by a measure of one overtravel (U) beyond this. When the intermediate section (50) is moved past the roller (22'), the triangular lever (76) moves under the force of the now tensioned disconnecting spring slowly back in the direction of rotation (D), until it is positioned with its pawl boss (78) in contact with the connecting pawl (72). As a result of this slow return motion, impact forces acting upon the pawl (34) are greatly reduced.
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