Patent ID: 7992469

Claim:
A screw feeding device adapted to be disposed in a tool body of a continuous screw driving tool, the tool body extending in an axial direction, said screw feeding device comprising: a feeder box mechanism adapted to be disposed in the tool body and including a feeder box having a front end surface, a rear end surface, a first lateral side surface, a second lateral side surface opposite to said first lateral side surface, a screw-discharging hole extending rearwardly from said front end surface, and a mounting groove formed in said first lateral side surface; and a lock mechanism including a stopper member movable on said first lateral side surface of said feeder box in the axial direction, an operating member movable within said mounting groove in said feeder box in a transverse direction perpendicular to the axial direction, and a resilient member disposed between said operating member and said feeder box, said stopper member having an adjustment slot extending in the axial direction, said adjustment slot having two closed ends opposite to each other in the axial direction, a plurality of large-diameter slot portions arranged in the axial direction, and a plurality of small-diameter slot portions arranged alternately with said large-diameter slot portions and each having a diameter smaller than that of each of said large-diameter slot portions, said operating member having a base portion disposed movably within said mounting groove, and an operating protrusion extending through said adjustment slot in said stopper member in the transverse direction, said operating protrusion of said operating member having a large-diameter protrusion portion and a small-diameter protrusion portion farther from said base portion than said large-diameter protrusion portion, said large-diameter protrusion portion having a diameter no larger than that of each of said large-diameter slot portions and larger than that of each of said small-diameter slot portions, said small-diameter protrusion portion having a diameter smaller than that of said large-diameter protrusion portion and no larger than that of each of said small-diameter slot portions, said operating protrusion being biased by said resilient member away from said feeder box, said operating member being movable relative to said feeder box between a first position whereat said large-diameter protrusion portion is disposed within a selected one of said large-diameter slot portions, and a second position whereat said small-diameter protrusion portion is disposed in said adjustment slot; wherein said mounting groove in said feeder box has a vertical groove portion and a horizontal groove portion extending from an upper end of said vertical groove portion in the transverse direction, said base portion of said operating member having a vertical section disposed within said vertical groove portion, and a horizontal section extending from an upper end of said vertical section and disposed within said horizontal groove portion.