Control element with anti-slip structure has rotation regulation unit switched into and out of engagement with rotary element that prevents lateral rotation of rotary element in engaged state

摘要

The control element (20) has an output shaft (27a) for driving a load, a drive motor (22) for driving and actuating the shaft and a slip prevention unit (30) preventing shaft slip resulting from an external load. The slip prevention unit has a rotary element (25-27) that turns with the motor, a rotation regulating unit (32) with an engagement section engaged with the rotary element and a switch unit that switches the rotation regulation unit into and out of engagement with the rotary element. The regulation unit prevents lateral rotation of the rotary element in the engaged state.