Blade-replaceable cutting tool

A blade-replaceable cutting tool, comprising:

• a first handheld portion;
• a second handheld portion rotatably connected to the first handheld portion;
• a cutting structure rotatably connected to the first handheld portion;
• wherein the cutting structure comprises a ratchet blade configured to be detachable from the first handheld portion, the ratchet blade refers to a blade having a portion of a side wall designed to be ratchet-shaped, and the ratchet blade comprises:
• a cutting portion provided at a front end of the ratchet blade;
• an arcuate plate arranged at a rear end of the ratchet blade, the arcuate plate has an arcuate side wall with ratchet teeth provided thereon;
• a connecting portion provided between the cutting portion and the arcuate plate and comprising a connecting portion snap slot extending from an outer edge of the connecting portion toward a detachable pin, wherein the connecting portion snap slot has an opening at the outer edge of the connecting portion;
• wherein the cutting structure further comprises a torsion spring sleeved on a mounting shaft, the mounting shaft is perpendicularly fixed to side walls of the first handheld portion, the connecting portion snap slot extends from the outer edge at a depth sufficient to accommodate an arm of the torsion spring, one arm of the torsion spring extends through the opening into the connecting portion snap slot, another arm of the torsion spring is fixed to the first handheld portion, the torsion spring is configured that during a process of opening or closing the first handheld portion and the second handheld portion, the torsion spring assists in exerting a force on the ratchet blade and the first handheld portion;
• wherein the detachable pin is provided at a connection between the first handheld portion and the ratchet blade, and the first handheld portion and the ratchet blade can be rotated about the detachable pin.