Wobble joint fitting for an adjustment device of a motor vehicle seat

摘要

A wobble joint fitting for an adjustment device of a motor vehicle seat, in particular for a seat back hinge fitting, comprises (a) a first fitting part comprising an internal ring gear, (b) a toothed eccentric gear that engages the internal ring gear and that has an eccentric hole, (c) an eccentric to which a rotatable drive part is associated and which comprises wedge segments, (d) a second fitting part that is adjustable with respect to the first fitting part, and (e) a wrap spring. The wrap spring is a flat open spring ring and extends over an angle of less than 360°. The eccentric gear comprises a collar for the spring ring to fit against.

主权项

1. A wobble joint fitting of an adjustment device of a motor vehicle seat comprising:
a first fitting part comprising an internal ring gear; a toothed eccentric gear engaging the internal ring gear and having a collar with an inner surface defining an eccentric hole; an eccentric and a rotatable drive part associated with the eccentric, the eccentric comprising wedge segments engaging the inner surface, and configured and adapted to cause the eccentric gear to engage internal ring gear; a second fitting part operatively connected to the eccentric gear and adjustable with respect to the first fitting part; comprising a substantially annular body defining a surface extending along substantially an entire annular extent of the annular body, an entirety of said surface of the annular body lies in a single plane, the spring ring extends over an angle of less than 360°, the annular body fitting against an outer surface of the collar with an elastic braking force; and a control part having contact surfaces configured for contacting the wedge segments interposed between the drive part and the spring ring, wherein during operation of the fitting the control part contacts the wedge segments and the wedge segments do not contact the spring ring; wherein upon rotation of the drive part, the drive part engages the spring ring and lifts at least a region of the spring ring from the collar, thereby reducing said braking force thereon, and the spring ring engages the control part and rotates the eccentric and thereby the wedge segments, for enabling respective adjustment of the first and second fitting parts.