SCREWING DEVICE

摘要

A screwing device comprises: a screwing part (10); an operating body (20), provided with a control chamber (200); and a control unit (30). The operating body (20) extends from the screwing part (10). The control unit (30) is arranged in the control chamber (200), and has an operating state and a non-operating state. When the control unit (30) is in the operating state, the control unit (30) and the operating body (20) form a force bearing position; when the control unit (30) is in the non-operating state, the stressed position is destroyed.