A stapler 100 is provided with a driver 5 provided at a forward end of the driver arm 4, as shown in FIG. 20A, driving a staple 30 out according to any predetermined clinching force, the driver 5 having projections 5b, 5b which contact portions of the staple 30 over the legs of the staple pushed aga
A stapler 100 is provided with a driver 5 provided at a forward end of the driver arm 4, as shown in FIG. 20A, driving a staple 30 out according to any predetermined clinching force, the driver 5 having projections 5b, 5b which contact portions of the staple 30 over the legs of the staple pushed against the front inner wall of the magazine 3 by a staple-pushing member 40. Accordingly, the clinching force is transferred to the legs through the projections 5b, 5b of the driver 5 so that the clinching force can be concentrated onto the legs. Furthermore, a staple-pushing member 40 pushes the staple 30, so that it is possible to prevent buckling from occurring in the legs.
대표청구항▼
1. A stapler that passes a pair of legs of a staple, which is constituted of a crown portion and the legs extending from both ends of the crown portion, through a stack of paper based on any predetermined clinching force and clinches the legs of staple to staple the stack of paper, characterized in
1. A stapler that passes a pair of legs of a staple, which is constituted of a crown portion and the legs extending from both ends of the crown portion, through a stack of paper based on any predetermined clinching force and clinches the legs of staple to staple the stack of paper, characterized in that the stapler comprises: a magazine that loads a staple therein, the magazine containing a staple-pushing-out slit at an end of the magazine;a driver arm that contains a driver which comes into contact with the crown portion of the staple positioned on the staple-pushing-out slit at an end thereof, and drives the staple based on the predetermined clinching force; anda staple-pushing member having an elastic pushing portion at its forward end with the elastic pushing portion being curved outwardly so as to extend into an opening in a front inner wall of the magazine, the staple-pushing member being mounted near the staple-pushing-out slit and pushing by the elastic pushing portion the crown portion of the staple driven by the driver arm against the front inner wall of the magazine; anda staple guide member that guides the staple pushed toward the staple-pushing-out slit of the magazine and supports the staple to be driven out of the staple-pushing-out slit of the magazine, the staple guide member being placed inside the magazine,wherein the driver of the driver arm includes a projection that comes into contact with a portion of the staple over the legs thereof, the staple being pushed against the front inner wall of the magazine by the staple-pushing member, the projection of the driver coming into contact with a portion of the staple supported by the staple guide member over any of the legs of the staple,wherein the staple guide member includes an elastic member that supports any one of the legs of the staple driven out of the staple-pushing-out slit of the magazine,wherein the elastic member is positioned so as to face an inner side wall of the magazine with a forward end of the elastic member being spaced from the inner side wall by an amount less than a thickness of any one of the legs of the staple,wherein when any one of the legs of the staple driven out of the staple-pushing-out slit passes through the space between the forward end of the elastic member and the inner side wall of the magazine, the elastic member contacts said any one of the legs of the staple so that said any one of the legs of the staple bends the forward end of the elastic member inwardly and the forward end of the elastic member pushes said any one of the legs against the inner side wall of the magazine; andwherein after said any one of the legs of the staple driven out of the staple-pushing-out slit passes through the space, the forward end of the elastic member returns to an original position thereof. 2. The stapler according to claim 1 characterized in that the magazine includes a front attaching portion provided at a forward inner portion of the magazine and a rear attaching portion provided at a rear inner portion of the magazine; and the stapler further comprises:a pusher that pushes the staple loaded in the magazine to the staple-pushing-out slit; andan axial guide member that guides the pusher, an end of the axial guide member being attached to the front attaching portion provided at a forward inner portion of the magazine and the other end of the axial guide member being attached to the rear attaching portion provided at a rear inner portion of the magazine;wherein the staple-pushing member is held by the front attaching portion and the axial guide member within the magazine. 3. The stapler according to claim 2 characterized in that the axial guide member includes a stopping member at a side of an end thereof; and the staple-pushing member is a plate having a bending sectional configuration and strides across the front attaching portion of the magazine with a forward end portion thereof facing a front inner wall of the magazine, a rear end portion of the staple-pushing member being held between the front attaching portion of the magazine and the stopping member of the axial guide member. 4. The stapler according to claim 3 characterized in that the magazine has an opening on a bottom thereof near the front attaching portion thereof; and the rear end portion of the staple-pushing member is inserted into the opening on the bottom of the magazine. 5. The stapler according to claim 3 characterized in that the front attaching portion of the magazine has a first hole to which the end of the axial guide member is inserted; and the staple-pushing member has a second hole, at the rear end portion thereof, to which the end of the axial guide member is inserted,wherein the rear end portion of the staple-pushing member is held between the front attaching portion of the magazine and the stopping member of the axial guide member by inserting the end of the axial guide member into the second hole and then, inserting the end of the axial guide member into the first hole. 6. The stapler according to claim 1 characterized in that the stapler further comprises: a staple cover that covers the staple in the magazine;a staple guide member that guides a loaded staple to the staple-pushing-out slit of the magazine, the staple guide member being placed inside the magazine;a pusher that is slidably engaged with the magazine and pushes the staple loaded in the magazine to the staple-pushing-out slit of the magazine; anda pusher band that pulls the pusher in the opposite direction of the pushing direction of the staple in response to rotation of the staple cover, an end of the pusher band being fixed to the pusher and the other end of the pusher band being fixed to the staple cover,wherein the pusher includes:a pusher main body that is fixed to the pusher band by inserting the end of the pusher band thereto, the pusher main body being positioned inside the staple guide member; andfirst and second pusher plates that contact the staple to be guided by the staple guide member, the pusher plates being connected to both sides of the pusher main body with the pusher plates being respectively set across both side edges of the staple guide member. 7. The stapler according to claim 6 characterized in that the pusher main body contains first and second coupling members having different shapes from each other on each side of the pusher main body, wherein the first and second pusher plates respectively contain fitting portions having predetermined shapes to fit the first and second coupling members thereto.
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이 특허에 인용된 특허 (13)
DeFonzo Stephan A. (Bridgeport CT) Pennatto Samson L. (Danbury CT) Komlosi Andrew (Fairfield CT), Apparatus and method for applying surgical staples to body tissue.
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