Electric hand-held binding apparatus

1. An electric hand-held binding apparatus comprising:

a wire feeding device including a wire disc configured to hold binding wire, a driving wire-feeding wheel rotatable about a driving wire-feeding wheel shaft, a driven wire-feeding wheel meshed with the driving wire-feeding wheel, and a wire-feeding bevel gear disposed on the driving wire-feeding shaft, wherein the wire feeding device is configured to convey the binding wire from the wire disc to a headpiece;

a twisting device including a twisting shaft having an axis of rotation perpendicular to an axis of rotation of the driving wire-feeding wheel, a fork disposed on an end of the twisting shaft and at least partially within the headpiece, a twisting shaft spur gear disposed on the shaft, and a twisting shaft bevel gear disposed on the shaft and meshed with the wire-feeding bevel wheel, wherein the twisting device is configured to wrap an object with the binding wire;

a cutoff device configured to cut the binding wires that are wrapped around the object to be bound;

an electric motor configured to supply power to the wire-feeding device, the twisting device, and the cutoff device;

a motor shaft gear disposed on an output shaft of the electric motor and meshed with the twisting shaft spur gear;

a first single-direction bearing disposed between the driving wire-feeding wheel and the driving wire-feeding wheel shaft, the first single-direction bearing being configured to permit the driving wire-feeding wheel to rotate in only one direction; and

a second single-direction bearing between the twisting shaft spur gear and the twisting shaft, the first single-direction bearing being configured to permit the driving wire-feeding wheel to rotate in only one direction; wherein

the twisting shaft spur gear includes a groove on a surface in contact with the twisting shaft bevel gear, and

the twisting shaft bevel gear includes a pillar configured to slide in the groove so that a rotation of the driving wire-feeding wheel shaft is desynchronized relative to a rotation of the twisting shaft.

2. The electric hand-held binding apparatus according to claim 1 , wherein the headpiece includes a wire guide block having an arc-shaped hole configured to shape the binding wire into a circle.

3. The electric hand-held binding apparatus according to claim 2 , wherein:

the cutoff device comprises:

a wire cutter connected to the headpiece at a hinge-point, and

a convex wheel disposed around the twisting shaft between the twisting shaft spur gear and the headpiece, an outer surface of the convex wheel contacting a tail end of the wire cutter so that a blade of the wire cutter is configured to moves in and out of a wire-cutting groove in the headpiece as the convex wheel rotates.

4. The electric hand-held binding apparatus according to claim 1 , wherein the twisting head comprises a U-shaped fork.

5. The electric hand-held binding apparatus according to claim 1 , further comprising:

a counter wheel disposed on the driving wire-feeding wheel shaft; and

a counting sensor is set up on the counter wheel.

6. The electric hand-held binding apparatus according to claim 1 , wherein the groove is an arc extending 350° on the surface of the twisting shaft spur gear.

7. The electric hand-held binding apparatus according to claim 3 , further comprising a spring in contact with the wire cutter and configured to return the wire cutter to its original position after cutting.

8. The electric hand-held binding apparatus according to claim 3 , further comprising:

a spring disposed on the tail end of the wire cutter, wherein,

as the twisting shaft rotates, the convex point of the convex wheel pivots the wire cutter about the hinge-point causing the blade to move down the blade cutting groove to cut the binding wire, and

when the convex point of the convex wheel moves past the wire cutter, the spring urges the blade up the blade cutting groove.