Ergonomic rotary tacker
A tacker for applying a rotary tack, including a tacker for applying a rotary tack, including a handle with a first trigger assembly and a second trigger assembly, the trigger assemblies being coupled to an articulated applicator arm which is disposed through a drive shaft connected to the handle, the first trigger assembly operative to apply a rotary tack from a distal end of the applicator arm and the second trigger assembly operative to bend the distal end of the applicator arm, wherein a longitudinal axis of the handle is tilted with respect to the drive shaft.
1. A tacker for applying a rotary tack, comprising:
a handle with a first trigger assembly and a second trigger assembly, said trigger assemblies being coupled to an articulated applicator arm which is disposed through a drive shaft connected to said handle, said first trigger assembly operative to apply a rotary tack from a distal end of said applicator arm and said second trigger assembly operative to bend said distal end of said applicator arm;
wherein a longitudinal axis of said handle is tilted with respect to said drive shaft;
and wherein said distal end has partial annular cuts formed thereon so that said distal end is bendable in a first direction and generally rigid in a second direction perpendicular to the first direction, said cuts being axially spaced from each other along said distal end, and wherein a portion of said partial annular cuts form a spring, such that a force of said spring moves said applicator arm from a bent position to a straight position;
wherein said second trigger assembly is attached to said distal end of said applicator arm with pull cables and one of said pull cables is used for bending said distal end and another of said pull cables is used for straightening said distal end.
2. The tacker according to claim 1 , wherein the longitudinal axis of said handle is tilted about 7-25° with respect to said drive shaft.
3. The tacker according to claim 1 , wherein for a given cross-section cut perpendicular to a longitudinal axis of said distal end at each partial annular cut, each partial annular cut comprises first and second cuts that each extend over an angular range of less than 180° on upper and lower halves, respectively, of the cross-section of said distal end.
4. The tacker according to claim 1 , wherein said first and second cuts terminate in oval terminuses perpendicular to the rest of the cut.
5. The tacker according to claim 1 , wherein a linkage assembly is pivotally connected between said second trigger assembly and said pull cables.
6. The tacker according to claim 1 , wherein said second trigger assembly comprises a thumb lever and a finger lever.
7. The tacker according to claim 1 , wherein said linkage assembly comprises a link that has a spring-loaded member that moves into a recess formed in said handle upon suitable movement of said second trigger assembly.
8. The tacker according to claim 1 , wherein said first trigger assembly comprises a trigger tilted with respect to said drive shaft.
9. The tacker according to claim 1 , wherein said trigger extends from a gear wheel which is biased by a biasing device, said gear wheel meshing through a series of gears with said applicator arm, such that squeezing said trigger towards said handle causes rotation of said distal end of said applicator arm.