Device for controlling the pivot movement of the head support connected to the backrest of a treatment table or chair

摘要

Device for controlling the pivot movement of a head support of a treatment table or chair for use in dental or medical treatment. The device comprises an arched support shaft (5), which is connected to the head support (4). The centre of curvature of the support shaft lies above the backrest (1). Provided in the upper part of the backrest (1) is a guide sleeve (3), which has an arched guide groove (2) or guide opening, into which the support shaft (5) is inserted in a sliding manner. The device has a locking mechanism (8) for fixing the support shaft (5) in a suitable position inside the guide groove (2). In addition, an unlocking mechanism (6) is provided for releasing the support shaft. <IMAGE>