| 摘要 |
PURPOSE: A screwdriver for a bolt and a screw is provided to improve work speed and reduce the fatigue of a wrist by allowing an operator to conveniently and rapidly tighten and release a bolt by pushing the same once with two fingers. CONSTITUTION: A screwdriver comprises as a stick type handle (10) and a connection member (30). The handle forms a cylindrical rotary groove (21) and a polygonal rotation preventing groove (20) by punching a hole on one side at a right angle to the connection member. The connection member includes a polygonal connection unit (31) and a clamping member (34). The clamping unit allows a user to easily tighten or release a bolt and a screw by connecting the connection member to the handle or separating the connection member from the handle while moving the connection unit to the rotary groove and the polygonal rotation preventing groove and by enabling the connection member to be rotated with two fingers. |
