| 摘要 |
A seat recliner including seat back and cushion supports connected about a pivotal axis and positioned relative to each other against pivoting in an infinite position adjustable manner. A housing is fixed to one of the supports and defines a pair of locking surfaces extending about the pivotal axis on opposite sides thereof with curved shapes that have increasing radii from the axis in opposite directions. A pair of cam members pivotal on the housing about the axis have respective cam surfaces that oppose the locking surfaces of the housing from opposite sides of the pivotal axis with curved shapes that have increasing radii in the same direction as their associated locking surfaces. A pair of locking slides are slidably mounted on the other support in a pivotally fixed relationship. Each slide has a first end slidably engaged with one of the locking surfaces on the housing and a second end slidably engaged with the cam surface on the opposite side of the pivotal axis from its first end such that the slides are positioned between the locking and cam surfaces and thereby prevent relative pivoting between the supports in either direction. A spring normally biases the cam members in opposite directions to maintain the slides in a wedged condition between the locking and cam surfaces. Pivotal movement of a manual knob relieves the cam members of the spring bias to release the slides from their wedged condition and thereby allow pivotal adjustment of the seat back support in an infinite position manner.
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