Importance

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Abstract

An actuation attachment includes a central slider formed at one end with a push button and at the opposite end with a holding piece for an actuator. The slider is inserted in a cylindrical sleeve so as to be movable in axial direction either relative to or in conjunction with the sleeve but engaging it for joint rotation. The sleeve is inserted in a cylindrical bore of a housing to move in axial direction and to rotate about its central axis. The slider is formed with an axially directed slot for accommodating opposite rear ends of two locking pins which are guided in corresponding radially directed bores in the sleeve. The locking pins are urged one from the other by a biasing spring. The cylindrical bore of the housing is formed with axially directed first and second guiding grooves for engaging rounded front ends of the locking pins. Each of the guiding grooves is separated by an inclined stopping surface and a radially directed stopping surface. An inner spring is arranged between the sleeve and the slider and an outer spring is arranged between the slider and the housing. An actuation member for an electrical controlling device is slidably arranged in the housing between the holder member of the slider and the sleeve. The second guiding grooves are provided with sickle shaped run on surfaces to disengage the locking pins from the radially directed stopping surfaces when the slider is turned about its central axis.

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First Claim