Abstract: A belt retractor having a belt shaft which is mounted rotatably on a frame fastenably fixed to a vehicle and on which belt shaft a seat belt can be wound, and having an electric motor for driving the belt shaft to perform a rotational movement, and having a shiftable planetary transmission which transmits the rotational movement from the electric motor to the belt shaft, having a planet carrier, and having a plurality of externally toothed planet gears which are mounted rotatably on the planet carrier and which, in order to produce a driving rotational connection, engage by means of their toothings in a toothing of a drive gear, which is driven by the electric motor, and, for the production of a driving rotational connection, said planet gears engage in a toothing of an output gear which is in driving rotational connection with the belt shaft.

Abstract: The present invention relates to an ejector clutch (1) for a belt tensioner, comprising a first shaft (10), a second shaft (20), and a coupling part (30), wherein the coupling part (30) is arranged between the first shaft (10) and the second shaft (20) in a longitudinal axis (X) defining an axial direction, 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, 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). The invention further relates to a belt tensioner with an ejector clutch (1).