A manually powered fastening tool which stores and instantly releases the energy of a spring such that it may force a staple type fastener into an object by an impact blow. In the present invention the squeeze handle is hinged near the end of the tool body opposite the end from which the staples exit. The user grips the tool near the staple exit end and pushes the squeeze handle toward the intended staple impact point. This novel arrangement causes the user to force the staple into the receiving object with the same hand that pushes the squeeze handle toward the tool body, while the prior art typically requires use of a second hand to hold the tool firmly upon the staple impact point. Improving from the prior art, the present design ensures that the staple exit end of the tool body will not lift away from the receiving object. The energy storage spring and handle engagement linkage are located remotely from the plunger in the present design. This allows the user to fully grip the tool near the staple exit end of the tool body. The motion of installing a staple with this novel staple gun is therefore similar to the intuitive motion used with a common desk top stapler.
A manually powered fastening tool that stores and instantly releases the energy of a spring such that it forces a staple or other fastener into an object by an impact blow, wherein the operating handle is hinged near the end of the tool body opposite the end from which the staples exit. A staple ejecting plunger is unstably linked to spring actuating levers such that with the removal of a light holding force, the plunger and actuating levers are de-linked. The tool housing comprises a cantilevered rear profile.
A manually powered fastening tool which stores and instantly releases the energy of a spring such that it may force a staple or other fastener into an object by an impact blow is disclosed. An actuating lever engages a plunger in an upward motion against a spring bias and in a sideways direction in a release motion. An arcing motion of the lever causes an element of the lever to rotate and slide rearward from the plunger and disengage from the plunger, thereby allowing the lever to slide sideways off an angled surface of the plunger. The plunger, once released and under spring bias, strikes a staple and drives the staple out from the tool into the object.
A forward acting stapler includes a unique linkage for driving a firing lever. The linkage includes two links which are each connected to the trigger lever by a roller. The roller is movable within a spot in the trigger lever. As the handle is driven, the two links cause the triggering level to pivot. As the trigger lever pivots it lifts a plunger against a spring force. At some point, the trigger portion releases the plunger allowing the plunger to be returned by the spring force by a staple.
The stapling apparatus of the present invention comprises a base member and a magazine member for accommodating a set of staples, each member having a first end and a second end, and the two members being pivotably connected to each other at the first ends. The stapling apparatus further comprises a striking plate for individually dispensing the staples upon actuation by a striker spring, and a triggering mechanism for triggering the actuation of the striker spring. In particular, the triggering mechanism comprises a triggering lever arranged such that the triggering lever triggers the actuation of the striker spring when the second ends of the two members are moved toward each other.
The present invention provides a stapler with a novel leaf spring actuation mechanism. According to the teaching of the present invention, the stapler comprises a striking plate for dispensing a staple from a staple magazine, a leaf spring engaged with the striking plate for driving the striking plate, and an actuation bar for lifting the leaf spring from a first position to a second position whereby lifting the striking plate from an initial position to a release position in which the leaf spring is released from the actuation bar to drive the striking plate towards the initial position. Preferably, a pair of lugs on the actuation bar pushes up a pair of tabs on the leaf spring when an L-shaped front end of the actuation bar moves upward along a ramp when an external force is applied to the actuation bar during the stapling operation.
