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US 5,328,120 AGranted
Safety belt retractor
AssigneeTRW Repa GmbH
InventorJohannes Schmid
Life of this patent
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AssigneeTRW Repa GmbH
InventorJohannes Schmid
Estimating the term…
The safety belt retractor includes an automatic blocking mechanism for securing a child's seat in the vehicle. A reduction gearing (24, 28, 30, 34, 38; 74, 78, 88) having a worm wheel (28, 78) reduces the belt reel rotation on transmission to a cam gear wheel (38; 88) rotatably mounted in the retractor frame (10) remote from the belt reel. On rotation of the belt reel, the cam gear wheel performs at the most one revolution. On further withdrawal of webbing, the cam member (42; 92) of the cam gear wheel (38; 88) tips a rocking lever (46; 96) which thereupon initiates a blocking of the belt reel against rotation in the direction of the webbing withdrawal. After a substantially complete winding back on of the webbing, the blocking is released again. The system is compact, easy to mount and can be set to various switch-over points by replacing only one component, i.e. the cam gear wheel.
A safety belt retractor for vehicles, comprising a frame, a reel rotatably mounted in said frame for coiling and uncoiling of belt webbing, a blocking mechanism for blocking rotation of said reel, a control disc mounted for limited relative rotation with respect to said reel, a gear wheel connected to said reel for joint rotation, said control disc carrying peripheral control teeth, and a blocking arm being pivotally mounted for movement between a first position engaged with said control teeth to stop rotation of said control disc and a second position disengaged from said control teeth, relative rotation between said reel and said control disc causing said blocking mechanism to be activated, and wherein said blocking arm is driven between its first and second positions by rotation of said gear wheel through a reduction gear, said reduction gear comprising a worm wheel and said blocking arm being pivotally mounted with respect to said frame.
Dependencies are inferred from the claim text.