Electric driving scissors

An electric driving scissors provide a high torsion force. The electric driving scissors includes a casing, a motor, a driving disk, a crank, and a cutting unit with a pair of knives. The driving disk, crank and knives of the cutting unit are connected pivotally and eccentrically. The motor is installed with a speed change means so that the rotation speed of the motor can be reduced to a lower speed in the rotary shaft with a higher torsion force. Thereby, a hard object can be cut. Furthermore, by the eccentric hole of the driving disk, the axial hole and pivotal hole at two ends of the crank, the rotary shaft of the motor can rotate, while the crank move linearly. Thereby, the angle of the movable knife of the cutting unit is changeable.

FIELD OF THE INVENTION

The present invention relates to scissors, and particular to an electric driving scissors, wherein a motor serves to drive two knives of a cutting unit so that the worker can operate the scissor with small power.

BACKGROUND OF THE INVENTION

In the prior art, a pair of scissors have a pair of knives and a pair of handles with a crossing structure. User's palm applies a force to the scissors, but unluckily, this prior art structure can not be operated electrically. However, it is often that people must use scissors to cut hard objects, such as branches of trees or flowers. Thus, the prior art scissors will make a larger load to the worker, but this is improper to children or women or old peoples.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide an electric driving scissors, wherein a motor serves to drive two knives of a cutting unit so that the worker can operate the scissor with small power.

To achieve above objects, the present invention provides an electric driving scissors which provide a high torsion force. The electric driving scissors includes a casing, a motor, a driving disk, a crank, and a cutting unit with a pair of knives. The driving disk, crank and knives of the cutting unit are connected pivotally and eccentrically. The motor is installed with a speed change means so that the rotation speed of the motor can be reduced to a lower speed in the rotary shaft with a higher torsion force. Thereby, a hard object can be cut. Furthermore, by the eccentric hole of the driving disk, the axial hole and pivotal hole at two ends of the crank, the rotary shaft of the motor can rotate, while the crank move linearly. Thereby, the angle of the movable knife of the cutting unit is changeable.

DETAILED DESCRIPTION OF THE INVENTION

Referring toFIGS. 1,2and3, the electric driving scissors of the present invention is illustrated. The electric driving scissors of the present invention includes the following elements.

A casing includes a first handle casing10and a second handle casing11. A power switch12is installed on the casing, a battery groove13for receiving batteries130, a receiving groove14for receiving a motor20. The casing has a plurality of positioning rods15for assembling the fixed knife31of the cutting unit30.

A motor20is installed with a speed change means21so as to provide a low speed rotation and a high tensional force through a rotary shaft22.

A cutting unit30installed at a front end of the casing and has a fixed knives31, and a movable knife33. A distal end of the fixed knife31has positioning holes32for assembling positioning rods15of the casing; a distal end of the movable knife33is installed with a driving arm34which has an axial hole35.

A crank26having two ends, each end has an axial hole27and another end thereof has a long pivotal hole28for assembling the driving arm34of the movable knife33. A resisting rod36passes through the axial hole35of the driving arm34so that the driving arm34of the movable knife33is pivotally installed to the crank26.

A driving disk23has a driving hole24at a center thereof. The rotary shaft22of the speed change means21of the motor20is assembled to the driving hole24of the driving disk23. The driving disk23has an eccentric hole25. An axial rod29passes through the axial hole27of the crank26and the eccentric hole25of the driving disk23so as to pivotally install the crank26to the driving disk23.

The assembly, use, operation and use of the present invention will be described here. Referring toFIG. 3and Fig. A—A inFIG. 3, when an object to be cut is placed between the two knives of the cutting unit30, the power switch12is pressed to rotate the motor20and the speed change means21with a lower speed, and thus the driving disk23rotates in a low speed. Since the eccentric hole25of the driving disk23and the axial hole27of the crank26is connected by using the axial rod29. The driving arm34inserts into the long pivotal hole28of the crank26so that the movable knife33is assembled to the crank26. Thereby, the orientation of the crank26is changeable along the axial hole and moreover the crank26can move forwards or backwards (in the drawing, it moves rightwards and leftwards) and change the orientation thereof. Thereby, the crank26can drive the driving arm34of the movable knife33. Thus, the movable knife33and fixed knife31can clip and cut the object therebetween.

In use of the present invention, it is only necessary to placed an object to be cut between the fixed knife31and the movable knife33. Then the power switch12is pressed. Thereby, the rotary shaft22and the driving disk23connected thereto will rotate so that the crank26will push or pull the driving arm34and the movable knife33so as to complete a cut operation without using manpower.

Moreover, it should be noted that in the present invention, the motor20is installed with a speed change means21so that the rotation speed of the motor20can be reduced to a lower speed in the rotary shaft22with a higher torsion force. Thereby, a hard object can be cut. Furthermore, by the eccentric hole25of the driving disk23, the axial hole27and pivotal hole28at two ends of the crank26, the rotary shaft22of the motor20can rotate, while the crank26move linearly. Thereby, the angle of the movable knife33of the cutting unit30is changeable. This is one of the primary features of the present invention.