Ejector clutch and belt tensioner

An ejector clutch (1) of a belt tensioner, comprising:

• a first shaft (10), a second shaft (20), and a coupling part (30), the coupling part (30) arranged between the first shaft (10) and the second shaft (20) in a longitudinal axis (X) defining an axial direction, and the coupling part (30) operatively coupled to a drive shaft;
• and
• the first shaft (10) supporting a first gearwheel (10a) and the second shaft (20) supporting a second gearwheel (20a), and the first and second gearwheels (10a, 20a) form gearing with a gear ratio such that the first gearwheel (10a) has a larger gear ratio than the second gearwheel (20a),
• wherein the coupling part (30) has at least one clutch finger (40), which engages in a first recess (15) of the first shaft (10) for transmitting a torque (M) and, when a torque (M2) to be transmitted is exceeded by a predetermined value, said clutch finger is displaced, against a spring force in the axial direction, from the first recess (15) of the first shaft (10) into a second recess (25) of the second shaft (20) and as the torque (M2) to be transmitted again fails below the predetermined value, the clutch finger (40) is moved, by the spring force, from the second recess (25) back into the first recess (15) of the first shaft (10).