Electric driving scissors
View Patent ↗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.
1. An electric driving scissors comprising:
a casing including a first handle casing and a second handle casing; a power switch being installed on the casing, a battery groove for receiving batteries, a receiving groove for receiving a motor; the casing having a plurality of positioning rods;
a motor being installed with a speed change means so as to provide a low speed rotation and an high tensional force through a rotary shaft;
a cutting unit installed at a front end of the casing and having a fixed knife, and a movable knife; a distal end of the fixed knife having positioning holes for assembling with the fixed knife to the positioning rods of the casing; a distal end of the movable knife being installed with a driving arm which has an axial hole;
a crank having two ends, each end has an axial hole and another end thereof having a long pivotal hole for assembling the driving arm of the movable knife; a resisting rod passing through the axial hole of the driving arm so that the driving arm of the movable knife being pivotally installed to the crank; and
a driving disk having a driving hole at a center thereof; the rotary shaft of the speed change means of the motor being assembled to the driving hole of the driving disk; the driving disk having an eccentric hole; an axial rod passing through the axial hole of the crank and the eccentric hole of the driving disk so as to pivotally install the crank to the driving disk;
wherein by above components, rotation of the motor causes the crank to move so as to drive the knives of the cutting unit to change the angle between the two knives so as to cut an object placed between the two knives.