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Retightener for automatic safety belt roll-up devices with a power reservoir which can be triggered in the case of a crash and with an energy transducer which acts upon the belt shaft of the automatic winder after triggering the power reservoir, causing the automatic winder to perform a rotary retig

Retightener for automatic safety belt roll-up devices with a power reservoir which can be triggered in the case of a crash and with an energy transducer which acts upon the belt shaft of the automatic winder after triggering the power reservoir, causing the automatic winder to perform a rotary retightening motion. A rotatable pulling means pulley is provided as energy transducer which can be coupled to the belt shaft. The pulling means of the pulley is in connection with the power reservoir and effects the coupling connection and a retightening motion of the belt shaft after triggering the power reservoir and after surmounting the holdback force of a holdback device, e.g. shear pins.

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In a retightener for an automatic safety belt roll-up device having a winder mounted on a belt shaft and biasing means for biasing the winder in a belt retraction direction, and with a power reservoir which can be triggered in case of a crash and with an energy transducer which acts upon the belt sh

In a retightener for an automatic safety belt roll-up device having a winder mounted on a belt shaft and biasing means for biasing the winder in a belt retraction direction, and with a power reservoir which can be triggered in case of a crash and with an energy transducer which acts upon the belt shaft of the automatic winder after triggering the power reservoir, causing the automatic winder to perform a rotary retightening motion, the combination therewith wherein (a) said energy transducer is a rotatable pulling means pulley, (b) coupling means for coupling the rotatable pulling means pulley with the belt shaft, for performing the rotary retightening motion after triggering the power reservoir, (c) flexible pulling means connecting the pulley to the power reservoir to impart energy from the power reservoir to energize the pulley to effect both the coupling connection with the belt shaft and the retightening motion of the belt shaft after triggering the power reservoir, and (d) holdback means to restrain said rotatable pulling means pulley from forming said coupling connection until said power reservoir is triggered.