Belt retractor
AssigneeAutoliv Development AB
InventorRonald Jabusch
Life of this patent
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Abstract
The present invention relates to a belt retractor comprising a belt shaft (5), which is mounted rotatably in a frame (1) and on which a safety belt can be wound, and a force-limiting unit (61) which, when activated, enables a rotational movement of the belt shaft (5) in the extension direction of the safety belt, wherein the force-limiting unit (61) comprises an electric motor (4) and a first blocking device, and the first blocking device is configured to release and again block, in a manner actuated by the activation of the electric motor (4), a rotational movement of the belt shaft (5) in the extension direction in a repeating sequence.
Claims13
A belt retractor comprising:
- a belt shaft, which is rotatably mounted in a frame and on which a safety belt can be wound, and
- a force-limiting unit, which, when activated, enables a rotational movement of the belt shaft in the extension direction of the safety belt,
- wherein
- the force-limiting unit has an electric motor and a first blocking device, which are both arranged in a rotational axis, and
- the first blocking device is configured to release and block again the rotational movement of the belt shaft in the extension direction in a repeating sequence by controlling an activation of the electric motor.
A belt retractor comprising:
- a belt shaft, which is rotatably mounted in a frame and on which a safety belt can be wound, and
- a force-limiting unit, which, when activated, enables a rotational movement of the belt shaft in the extension direction of the safety belt,
- wherein
- the force-limiting unit has an electric motor and a first blocking device,
- the first blocking device is configured to release and block again the rotational movement of the belt shaft in the extension direction in a repeating sequence by controlling the activation of the electric motor,
- the first blocking device can be moved as a function of the activation of the electric motor from a position blocking the belt shaft into a position releasing the belt shaft,
- the first blocking device automatically blocks again after a predetermined rotation angle of the belt shaft as a result of the enabled rotational movement of the belt shaft in the extension direction,
- an unlocking ring is provided which is driven by the electric motor and has a control contour, and
- the first blocking device is formed by at least one blocking element that abuts against the control contour.
Dependencies are inferred from the claim text.