Adjusting and locking device for seats, particularly motor vehicle seats.
The adjusting and locking device can be set in the case of a joint fitting for adjustment of a backrest and has a fixed joint component and a swivellable joint component which is assigned to the backrest, which joint components are connected to one another by means of a pivot axis. In this arrangement, an adjusting and locking device which is constructed as a gear system and determines the position of the two joint components with respect to one another is provided, the pivot axis which bears the one joint component having a section for a rotationally fixed driver which engages between the narrow sides of two wedge segments which are inclined with respect to one another and engage around the pivot axis in certain areas. Between the broad sides of the wedge segments, an energy accumulator which presses the latter apart in the manner of a radial play-reducing element is arranged. The pivot axis has an eccentric section which is formed by the wedge segments around which the bearing point of the one joint component engages by means of a roller bearing. <??>In order to optimise the ease of movement of the adjustment fitting during the adjustment phase and, in the event of locking, to maintain the freedom from play at the engagement point of the toothings and in the bearing points, the roller bearings of the roller bearing engage around the wedge segments on their external circumference - producing only rolling friction at the external circumference. <IMAGE>