Patent ID: 8434961

Claim:
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; a second fitting part operatively connected to the eccentric gear and adjustable with respect to the first fitting part; 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 the internal ring gear, the eccentric configured and adapted to maintain the wedge segments in engagement with the inner surface; and a wrap spring; wherein the wrap spring is a flat open spring ring, the spring ring comprises 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 thereon, thereby suppressing movement of the first and second fitting parts; wherein the spring ring further comprises two end regions and the end regions protrude radially from the annular body; wherein the eccentric further comprises 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; wherein the drive part has a lug and the lug is located between the two end regions of the spring ring, the angular extension of the spring ring plus an angular extension of the lug plus necessary free space add up to a complete circle of 360° ; and wherein during rotation of the drive part, the lug engages one of the end regions and lifts at least a region of the spring ring from the collar, thereby reducing said braking force thereon, and said one of the end regions engages the control part and rotates the eccentric and the wedge segments, for enabling respective adjustment of the first and second fitting parts.