A portable and easy-to-use alternate fish cutter, comprising a housing constituting a handle, a cutting knife extending from an inside of the handle to an outside of a front end of the handle, a driving mechanism for the cutting knife provided in the handle, a switch button for the driving mechanism located on the housing, and a power supply module located at a rear end of the handle;
- wherein,
- the cutting knife includes a pair of left and right knives arranged side by side, the left and right knives both include a blade portion located at a front end thereof and a handle portion located at a rear end thereof, and the handle portion is inserted into the handle from the front end of the handle;
- the driving mechanism for the cutting knife includes a pair of left and right knife arms arranged in the handle, a handle portion of the left knife is detachably fixed on the left knife arm from front to back, and a handle portion of the right knife is detachably fixed on the right knife arm from front to back, the handle is also provided with a guide rail or a guide channel for guiding the left knife arm and the right knife arm to reciprocate only along a front and rear direction;
- the driving mechanism for the cutting knife also includes a worm wheel arranged behind the left knife arm and the right knife arm, and a rotating shaft of the worm wheel is arranged along a left and right direction and is perpendicular to moving directions of the left knife arm and the right knife arm, both sides of the worm wheel are respectively provided with a left eccentric wheel and a right eccentric wheel, and the rotating shaft of the worm wheel passes through the left eccentric wheel and the right eccentric wheel, a center of the left eccentric wheel and a center of the right eccentric wheel are located on the both sides of the rotating shaft of the worm wheel, when the worm wheel rotates, the motion trajectories of the left eccentric wheel and the right eccentric wheel projected in a front and rear direction alternate;
- further comprising a left connecting rod and a right connecting rod connecting the worm wheel and the two knife arms, a front end of the left connecting rod is drivingly connected with a rear end of the left knife arm, and a rear end of the left connecting rod is rotatably connected with the left eccentric wheel of the worm wheel, a front end of the right connecting rod is drivingly connected with a rear end of the right knife arm, and a rear end of the right connecting rod is rotatably connected with the right eccentric wheel of the worm wheel, the left eccentric wheel drives the left knife arm through the left connecting rod, and the right eccentric wheel drives the right knife arm through the right connecting rod;
- the driving mechanism for the cutting knife also includes a worm and a motor for driving the worm wheel to rotate, and surfaces of the worm wheel and the worm are both provided with mutually meshing helical teeth, the worm is set on an output shaft of the motor, and the worm is driven by the motor to rotate, and the worm drives the worm wheel to rotate, in the handle, the motor, the worm, the worm wheel, the connecting rods and the knife arms of the driving mechanism are arranged in sequence from the back to front;
- and
- the power supply module is connected to the motor and supplies power to it, the switch button is connected to a power supply circuit, and the operation of the motor is controlled by the switch button.