Disc Recliner With Tapered Pin Cam Surface

摘要

A disc recliner comprises a fixed guide plate coupled to a rotatable tooth plate. Pawls are movable between a first position interlocking the guide plate and tooth plate in a locked condition and a second position disengaged from the tooth plate in an unlocked condition to allow pivotal movement therebetween. A shaft extends through the guide plate and the tooth plate and a cam is fixedly mounted on the shaft for engagement with the pawls. A drive nut is fixedly mounted to the guide plate for rotation therewith. A drive screw is fixedly mounted to the shaft and matingly engaged with the drive nut wherein rotation of the shaft rotates the drive screw and the drive nut causes lateral movement of the shaft and cam along an axis to drive the pawls between the first and second positions thereby actuating the disc recliner between a locked and unlocked conditions.

主权项

1. A disc recliner operatively coupling a seat back to a seat cushion for providing selective pivotal movement of the seat back between a plurality of reclined seating positions, said disc recliner comprising:
a guide plate adapted to be mounted to one of the seat back and seat cushion; a tooth plate adapted to be mounted to the other of the seat back and seat cushion, wherein said tooth plate is rotatably coupled to said guide plate; at least one pawl operatively coupled to said guide plate and movable between a first position engaging said tooth plate, thereby interlocking said guide plate and said tooth plate in a locked condition to prevent pivotal movement of the seat back, and a second position disengaged from said tooth plate, thereby unlocking said guide plate and said tooth plate in an unlocked condition to allow pivotal movement of the seat back; a shaft extending laterally along an axis through said guide plate and said tooth plate; a cam fixedly mounted on said shaft for selective engagement with said pawls; a drive nut fixedly mounted to said guide plate; and a drive screw fixedly mounted to said shaft adjacent to said cam and matingly engaged with said drive nut wherein rotation of said shaft rotates said drive screw within said drive nut and said drive nut causes lateral movement of said shaft and cam along said axis to drive said at least one pawl between said first and second positions thereby actuating said disc recliner between said locked and unlocked conditions and allowing selectively pivotal movement of the seat back relative to the seat cushion.