Safety belt retractor with a two-spring comfort function
AssigneeAutoliv Development AB
InventorRonald Jabusch
Life of this patent
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Abstract
The invention relates to a safety belt retractor that has a two-spring comfort function, a belt shaft which is rotatably mounted in a housing and on which a safety belt can be wound, and at least two return springs that are spring-loaded in the winding direction of the belt and act between the housing and the belt shaft. The return springs being able to be connect by one end to the belt shaft or the housing by means of a shift device that shifts as a function of the extraction length of the safety belt.
Claims16
A seatbelt retractor for a seatbelt having a two-spring
- comfort function comprising:
- a belt shaft rotatably supported in a housing, on which the seatbelt is windable, and
- a first and a second retraction spring each being spring-preloaded in a winding direction of the seat belt, acting between the housing and the belt shaft,
- the first and second retraction springs are disposed between the belt shaft and the housing so as to act in parallel, and
- at least one of the first and second retraction springs is connected by an end to the belt shaft or the housing via a switching device switching as a function of the extension length of the seatbelt,
- wherein the end of one of the first and second retraction springs is held on a coupling part, on which a movable locking part is provided, which connects the coupling part to the belt shaft in a position, and
- wherein the movement of the locking part is controllable by the switching device, which includes a linearly displaceable switching part for controlling the movement of the locking part, and wherein the movement of the switching part is controlled by the switching device as a function of the extension length of the seatbelt.
A seatbelt retractor for a seatbelt having a two-spring comfort function comprising:
- a belt shaft rotatable supported in a housing, on which the seatbelt is windable, and
- a first and a second retraction spring each being spring-preloaded in a winding direction of the seat belt, acting between the housing and the belt shaft,
- the first and second retraction springs are disposed between the belt shaft and the housing so as to act in parallel, and
- at least one of the first and second retraction springs is connected by an end to the belt shaft or the housing via a switching device switching as a function of the extension length of the seatbelt,
- wherein the switching device comprises a mechanical counting mechanism driven by the belt shaft, the counting mechanism including a wobble disc driven by the belt shaft via an eccentric, which wobble disc wobbles in a gearing, fixed with respect to the housing, due to the eccentric drive via the belt shaft, and wherein two projections are provided, one of which is on the wobble disc and another one of which is on the switching part, which each abut one other in pairs in a position and thereby force the linearly switching movement of the switching part.
Dependencies are inferred from the claim text.