Blade-replaceable cutting tool

Patent metadata

Field	Value
Publication number	US-12017374-B2
Application number	US-202117358942-A
Country	US
Kind code	B2
Filing date	Jun 25, 2021
Priority date	Dec 27, 2016
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

The present invention provides a blade-replaceable cutting tool, which includes: a first handheld portion and a second handheld portion; the second handheld portion is rotatably connected to the first handheld portion; and further includes a blade mounting plate and a blade, the blade mounting plate is rotatably mounted to the first handheld portion; the blade is detachably mounted to the blade mounting plate. Wherein, the blade mounting plate and the blade may be replaced with a ratchet blade which is detachably and rotatably mounted to the first handheld portion.

First claim

The invention claimed is:

1. 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.

2. The blade-replaceable cutting tool according to claim 1 , wherein the arcuate plate further comprises:
a ratchet tooth clearance provided between any two adjacent ratchet teeth;
wherein the second handheld portion is provided with a first buckle and/or a second buckle on a side facing the first handheld portion, which is snapped into any one of the ratchet tooth clearances.

3. The blade-replaceable cutting tool according to claim 1 , wherein
a first side wall through hole of the first handheld portion penetrating through a first side wall of the first handheld portion;
a second side wall through hole of the first handheld portion penetrating through a second side wall of the first handheld portion; and
a blade through hole penetrating through the ratchet blade;
wherein the detachable pin successively passes through the first side wall through hole of the first handheld portion, the blade through hole and the second side wall through hole of the first handheld portion.

4. The blade-replaceable cutting tool according to claim 3 , wherein the detachable pin comprises:
a hollow shaft comprising the following components which are formed integrally:
a hollow shaft sleeve successively passing through the first side wall through hole of the first handheld portion, the blade through hole and the second side wall through hole of the first handheld portion; and
a shaft sleeve base exposed to the outside of the first side wall of the first handheld portion; and
a rotating member comprising the following components which are formed integrally:
a rotating shaft inserted and threadedly connected to the hollow shaft sleeve; and
a rotating shaft base exposed to the outside of the second side wall of the first handheld portion and having an outer surface provided with a flat or cross-shaped groove.

5. The blade-replaceable cutting tool according to claim 3 , wherein the detachable pin comprises:
a nut exposed to the outside of the first side wall of the first handheld portion; and
a screw having a front end inserted and threadedly connected to the nut and a rear end provided with a screw base exposed to the outside of the second side wall of the first handheld portion and having an outer surface provided with a flat or cross-shaped groove.

Assignees

• Hangzhou Great Star Ind Co Ltd
• Hangzhou Great Star Tools Co Ltd

Inventors

• Li Yueming

Classifications

• B26B5/00 Primary

  Hand knives with one or more detachable blades · CPC title

• B23D21/10

  with other cutting blades or tools · CPC title

• B25B7/12

  involving special transmission means between the handles and the jaws, e.g. toggle levers, gears · CPC title

• B26D3/16

  Cutting rods or tubes transversely {(cutting tubes longitudinally B26D3/001)} · CPC title

• B25B7/14

  Locking means {(B25B7/123 takes precedence)} · CPC title