| 摘要 |
A linear recliner for a vehicle seat assembly providing selectively lockable pivotal adjustment of a seat back pivotally coupled to a seat cushion between a plurality of reclined seating positions. A housing is fixedly secured to the seat cushion. The housing includes a bore extending between front and rear ends of the housing. A chamber is formed within the housing adjacent and open to a portion of the bore. A rod extends between one end pivotally coupled to the seat back and an opposite end slidably carried within the bore of the housing for axial displacement of the rod within the bore during pivotal movement of the seat back. The rod includes a rack of teeth extending towards the chamber. A pawl lockably engagable with the rack of teeth in the rod for preventing axial displacement of the rod within the bore is pivotally coupled to the housing for movement in and out of the locking engagement with the rack of teeth in the rod. The pawl includes an opening extending between opposing and spaced apart upper and lower edges. A step portion and a relief portion define the lower edge. A cam having a primary lobe engagable with the step portion of the lower edge and a secondary lobe engagable with the upper edge is pivotally coupled to the housing for moving the primary and secondary lobes in and out of camming engagement with the step portion and upper edge, respectively. While engaged with the step portion, the primary lobe of the cam maintains the pawl lockably engaged with the rack of teeth in the rod. During manual rotation of the cam, the secondary lobe engages the upper edge to move the pawl out of locking engagement with the rack of teeth in the rod when the primary lobe disengages the step portion and extends towards the relief portion. An internal spring extends between one end fixedly secured to the pawl and an opposite end fixedly secured to the cam. The internal spring simultaneously and continuously biases the pawl towards locking engagement with the rack of teeth in the rod and the primary lobe of the cam towards camming engagement with the step portion.
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