Retraction locking safety belt retractor

Claim 1

A belt retractor device comprising a U-shaped mounting bracket, a shaft rotatably supported by said bracket, a reel mounted on said shaft and rotatable therewith in opposite belt retraction and extraction directions, a belt coupled to said reel and windable thereon with the belt retraction rotation thereof, spring means biasing said reel and shaft in a belt retraction direction, first braking means for braking said reel against rotation in a belt retraction direction and transferrable between braking and release positions and actuating means responsive to the successive extraction and retraction rotation of said reel for alternatively positioning said first braking means in said braking or release positions, said device being characterized in that said first braking and actuating means comprise a ratchet wheel rotatable with said shaft, a pawl pivotally mounted on said bracket and movable between ratchet wheel engage and disengage positions to respectively brake and release said reel, spring means urging said pawl toward a ratchet wheel engage position, a first driven member slip drive coupled to said reel and rotatable a predetermined angle and having a lock portion adapted to releasably lock said pawl in its ratchet wheel disengage position, a second driven member slip coupled to said reel and rotatable a predetermined angle to swing said pawl toward said first drive member with the belt extraction rotation of said reel, a drive disc coaxially affixed to said shaft, said first and second driven members comprising disc members coaxially located on said shaft and rotatable relative thereto between said ratchet wheel and said drive disc and spring means urging each of said driven disc members into frictional drive engagement with said drive disc and ratchet wheel respectively.