| 摘要 |
<p>The back rest and seat fitting members of an automotive seat are pivotally interconnected by means of a cross shaft for adjusting the inclination of the back rest; one of the fitting members is provided with a toothed segment concentric with respect to the pivotal shaft and the other of the fitting members is provided with a rotatably mounted gear wheel in meshing engagement with the toothed segment for driving a larger gear wheel that may be selectively locked against rotation by means of a detent positively cammed into locking engagement by movement of an actuating lever into a first position, with movement of the actuating lever pivotally about the pivotal axis to a second position causing withdrawal of the detent by means of a pin and slot connection between the lever and detent. The detent is guided for radial reciprocation, with respect to the pivotal axis, on the fitting member carrying the gear wheels, and the detent member further has a slot elongated in the direction of reciprocation and surrounding the pivotal shaft. Springs may be provided to bias the actuating lever into its locking position and further for biasing the back rest pivotally to its upright position. One of the gear wheels, preferably the smaller gear wheel in tooth engagement with the gear's toothed segment is integrally formed in one piece with a stub shaft splined entirely to its outer terminal end with a single spline root diameter, a first intermediate outer spline diameter portion receiving an internally splined annular bearing member, and an outermost shaft portion having an outer spline diameter less than said intermediate shaft portion outer spline diameter for receiving with a force fit the larger of the two toothed wheels that selectively meshes with the detent.</p> |
