Abstract: An adjusting device for a seat, couch or a bed utilizes a rotatably mounted eccentric in a round disc connected to the motor via a gearing. The round disc has an external tooth system that meshes with an internal tooth system a ring. A rod is connected to the ring is adapted to transmit adjusting force to one of the base sections of the seat, couch or bed. The adjusting device provides a more compact adjustable drive with the feature of single-base drive.