Power-assisted folding knife

Patent metadata

Field	Value
Publication number	US-10583571-B2
Application number	US-201515544398-A
Country	US
Kind code	B2
Filing date	Jan 19, 2015
Priority date	Jan 19, 2015
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

A power-assisted folding knife is provided, including a blade holder, a blade arranged in the blade holder, a handle rotatably connected to the blade holder, a locking mechanism for locking the blade holder in an unfolded position and/or a folded position and a power-assisting mechanism connected to the blade holder and the handle. The power-assisted folding knife uses an assisting mechanism for providing assisting power when unfolding a folding knife, so as to facilitate easier unfolding of the folding knife and to allow single hand operation. Through the locking mechanism, the blade holder can be locked in an unfolded position and/or a folded position to ensure safe use of the power-assisted folding knife.

First claim

The invention claimed is:

1. A power-assisted folding knife, comprising:
a blade holder;
a blade arranged in the blade holder;
a handle rotatably connected to the blade holder;
a locking mechanism for locking the blade holder in an unfolded position and/or a folded position;
wherein the power-assisted folding knife further comprises:

an assisting mechanism connected to the blade holder and the handle, for providing assisting power when unfolding the power-assisted folding knife;
wherein the assisting mechanism is steel wire;

the blade holder comprises a first portion and a second portion, the steel wire being arranged between the first portion and the second portion;
wherein the first portion of the blade holder is arranged with a first arc-shaped slot, the axis of the first arc-shaped slot coinciding with a first rotation axis, the first rotation axis referring to a rotation axis of the blade holder and the handle, a first end of the steel wire being provided with a first curved part passing through the first arc-shaped slot and embedded in an aperture of the handle; and
wherein one side of the second portion of the blade holder, which faces toward the blade, is arranged with a slot, a second end of the steel wire being provided with a second curved part embedded in the slot.

2. The power-assisted folding knife as claimed in claim 1 , wherein during the unfolding process of the power-assisted folding knife, the torque produced by the elastic force of the steel wire enables the blade holder and the handle to rotate in a direction of unfolding after the second end of the steel wire passes over an extension line of a connection line 3 of the first end and the first rotation axis, so as to provide assisting power for unfolding the power-assisted folding knife.

3. The power-assisted folding knife as claimed in claim 1 , wherein during the folding process of the power-assisted folding knife, the torque produced by the elastic force of the steel wire enables the blade holder and the handle to rotate in a direction of folding after the second end of the steel wire passes over an extension line of a connection line of the first end and the first rotation axis, so as to realize the self-lock of the power-assisted folding knife.

4. The power-assisted folding knife as claimed in claim 1 , wherein the first portion and the second portion of the blade holder are integrated.

5. The power-assisted folding knife as claimed in claim 1 , wherein the locking mechanism is a side lock or a back lock.

6. The power-assisted folding knife as claimed in claim 1 , wherein the blade holder further comprises a blade-mounting portion; and the blade-mounting portion is integrated.

7. The power-assisted folding knife as claimed in claim 1 , wherein the blade holder is arranged with a blade-pushing pin.

Assignees

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

Inventors

• Wang Weiyi

Classifications

• B26B1/044 Primary

  by a spring tongue snapping behind or into the tang of the blade from a side part of the handle · CPC title

• B26B1/04 Primary

  lockable in adjusted position · CPC title

• B26B5/00

  Hand knives with one or more detachable blades · CPC title

• B26B1/048

  with a locking member being slidable or movable along the handle · CPC title