Back rest, e.g. for office or orthopaedic chair, wheelchair or car seat, to relieve load on spine; has clamps with ball joints connected by connection piece and supported by holder

摘要

The back rest has two clamps supplied with ball joints. A connection piece connects the clamps. A holder supports the connection piece. The holder is made of soft material with a hard inner core. The clamps are made of metal or hard plastics and may be covered with foam, leather, fabric or felt. The clamps may alternatively be injection-moulded from plastics.