Patent ID: 8826781
Filing Date: 2014-09-09
Classification: B25B,B25G,Y10S,Y10T

Abstract:
1. A screwdriver, comprising: a grip comprising an accommodation chamber axially extending to a front side thereof; an inner tube affixed to said grip in said accommodation chamber, said inner tube comprising at least one interference hole located on the periphery near a front end thereof and an inner circumferential surface having a non-circular cross section; a rod member axially movably inserted into said inner tube, said rod member comprising a tool bit connector located on a front end thereof and disposed outside said inner tube, a cross section corresponding to the cross section of the inner circumferential surface of said inner tube, at least one interference groove located on the periphery near thereof near said tool bit connector, a neck disposed near a rear end thereof and a latching member arranged at and protruding over the periphery thereof between said neck and said at least one interference groove; an operating device set comprising an operating member, an actuation member and at least one interference member, said operating member being arranged at the front end of said grip and rotatable relative to said grip by a user, said actuation member being accommodated in said accommodation chamber and drivable by said operating member to move between an actuated position and a normal position, said at least one interference member being disposed in said accommodation chamber and driven by said actuation member to partially project through said at least one interference hole into the space inside said inner tube, said actuation member comprising a pressure wall, said pressure wall holding down said at least one interference member to partially project through said at least one interference hole into the space inside said inner tube when said actuation member is in said normal position, said pressure wall being kept away from said at least one interference member when said actuation member is in said actuated position; a first elastic member accommodated in said accommodation chamber and adapted to impart a pressure to said actuation member toward said normal position; a ring cap capped on the front end of said inner tube, said ring cap comprising an axial hole for the passing of said rod member and a stop wall radially disposed around the axial hole for stopping against said latching member; and a second elastic member mounted in a rear side inside said inner tube and adapted to impart a forward pressure to said rod member to push said rod member out of said inner tube.