Screwdriver for operating self-tightening screw
OwnerShu Te Wuinventor
Life of this patent
Estimating the term…
Abstract
Screwdriver for operating self-tightening screw, including a grip; a striking mechanism disposed in the grip for providing a striking force; and a stem body slidably disposed in the grip. The top end of the stem body is drivingly engaged with the striking mechanism. The bottom end of the stem body serves to drive the self-tightening screw. In use, the screwdriver is pressed downward against the self-tightening screw. At this time, the stem body is slided into the grip to drivingly move the striking mechanism. The striking mechanism produces a striking force acting on the self-tightening screw so as to nail the self-tightening screw into a screwing position of a work piece. Then the screwdriver is used to screw the self-tightening screw into the work piece.
Claims51
Screwdriver for operating a self-tightening screw, comprising:
- a grip for a user to hold, the grip being formed with an axial passage passing through a bottom end of the grip;
- a striking mechanism disposed in the passage for providing a striking force acting onto the bottom end of the grip;
- and
- a step body, a top end of the stem body being slidably disposed in the passage without dropping out, a bottom end of the stem body protruding out of the grip for engaging with a self-tightening screw, a torque being transmitted between the stem body and the grip, the top end of the stem body being drivingly connected with the striking mechanism, a striking force provided by the striking mechanism acting on the stem body, wherein an inner side of the top end of the stem body has a stop section, the screwdriver further comprising a stop member having an engaging section, the stop member being disposed on a circumferential face of the grip and movable between two positions, whereby when the stop member is positioned at a first position, the engaging section is engaged with the stop section to locate the stem body, while when the stop member is positioned at a second position, the stop section is disengaged from the engaging section, permitting the stem body to slide,
- whereby, when the self-tightening screw is engaged with the stem body and the screwdriver is pressed downward against the self-tightening screw, making the self-tightening screw and the stem body move toward the passage, the striking mechanism provides the striking force which acts on the self-tightening screw to nail the self-tightening screw into a screwing position of a work piece and then the screwdriver can be turned to screw the self-tightening screw into the work piece.
Screwdriver for operating self-tightening screw as claimed in claiming 14, wherein the bottom end of the hammering body is formed with a radial tunnel communicating with the shaft hole, the screwdriver further comprising an aligning ember slidably fitted in the tunnel, a body of the aligning member being formed with a hole corresponding to the shaft hole, a resilient member being disposed between the hammering body and the aligning member for resiliently pushing the aligning member to slide outward from the tunnel and making the hole disaligned from the shaft hole, the rod section of the hammering bar abutting against the aligning member from the bottom end of the shaft hole, whereby after the hammering bar and the hammering body are moved upward by a predetermined distance, the aligning member is slided into the tunnel to make the hole aligned with the shaft hole, permitting the rod section to insert into the shaft hole.
Screwdriver for operating self-tightening screw comprising:
- a grip formed with an axial passage passing through a bottom end of the grip;
- a striking mechanism disposed in the passage for providing a striking force due to external force;
- a stem body slidably disposed in the passage, a bottom end of the stem body protruding out of the grip, a top end of the stem body being drivingly connected with the striking mechanism, whereby when the stem body suffers a force to slide into the passage, the striking force provided by the striking mechanism acting on the stem body;
- a rotary controlling member disposed on the grip for a user's hand to shift;
- an engaging member disposed between the stem body and the rotary controlling member;
- and
- a ratchet mechanism disposed between the grip and the stem body, whereby when operating the rotary controlling member, the rotary controlling member is drivingly connected with the engaging member and the ratchet mechanism, the rotary controlling member cooperating with the engaging member to fix the stem body and prevent the stem body from being drivingly connected with the striking mechanism or disengage the stem body and control whether the ratchet mechanism provides a ratchet effect for the stem body.
Screwdriver for operating self-tightening screw comprising:
- a grip formed with an axial passage passing through a bottom end of the grip;
- a striking mechanism disposed in the passage for providing a striking force acting onto the bottom end of the grip due to external force;
- a stem body slidably disposed in the passage, a bottom end of the stem body protruding out of the grip, a top end of the stem body being drivingly connected with the striking mechanism, whereby when the stem body suffers an external force to slide into the passage, the striking mechanism providing the striking force acting on the stem body;
- a rotary controlling member disposed on the grip for a user's hand to shift;
- and
- a ratchet mechanism disposed between the grip and the stem body;
- whereby when operating the rotary controlling member, the rotary controlling member is drivingly connected with the ratchet mechanism to control whether the ratchet mechanism provides a ratchet effect for the stem body.
Dependencies are inferred from the claim text.