US 5,823,457 AGranted

Safety belt reeling device with comfort function

AssigneesAutoliv Development AB, Mercedes-Benz AG

InventorsWalter Jahn, Lars Axelsson, Frank Fugel

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Abstract

A safety belt reeling device with comfort function has a housing and a reeling shaft rotatably supported in the housing. A pawl wheel is fastened to the reeling shaft and switchable between a locked position in which rotation of the pawl wheel is blocked and a release position in which the pawl wheel is rotatable. A winding spring, connected with a first end to the housing and with a second end to the pawl wheel, is provided for rotating the reeling shaft when the pawl wheel is in the release position. A comfort spring with a weaker spring force than the winding spring is provided. The comfort spring is connected with a first end to the pawl wheel and with a second end to the reeling shaft. The pawl wheel has a stay with a first and a second end. The first end of the comfort spring is guided in a single loop about the first end of the stay. An elastically deformable dampening element is positioned between the first end of the stay and the single loop. The dampening element reduces the load impact on the comfort spring, when the pawl wheel is switched into the release position, by allowing a displacement of the single loop relative to the stay.

Claims5

Dependent claims

A safety belt reeling device with comfort function, said safety belt reeling device comprising:

a housing;
a reeling shaft rotatably supported in said housing;
a pawl wheel rotatably mounted on said reeling shaft and switchable between a locked position in which rotation of said pawl wheel is blocked and a release position in which said pawl wheel is rotatable;
a winding spring, connected with a first end to said housing and with a second end to said pawl wheel, for rotating said reeling shaft when said pawl wheel is in said release position;
a comfort spring having a weaker spring force than said winding spring;
said comfort spring connected with a first end to said pawl wheel and with a second end to said reeling shaft and serially switched with said winding spring such that, after tensioning of said comfort spring, a force of said winding spring is transmitted via said pawl wheel and said comfort spring onto said reeling shaft;
said pawl wheel having a stay with a first and a second end;
said first end of said comfort spring guided in a single loop about said first end of said stay;
an elastically deformable dampening element positioned between said first end of said stay and said single loop;
said dampening element reducing a load impact on said comfort spring, when said pawl wheel is switched into said release position, by allowing a displacement of said single loop relative to said stay.

7 more elements

Dependencies are inferred from the claim text.