Manual tool capable of unfolding only one work accessory

Patent metadata

Field	Value
Publication number	US-9908248-B2
Application number	US-201314369840-A
Country	US
Kind code	B2
Filing date	Jul 4, 2013
Priority date	Nov 28, 2012
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A manual tool capable of unfolding only one work accessory comprises a handle ( 11, 21 ), a first work accessory ( 12, 22 ) and a second work accessory ( 13, 23 ) that are connected to the handle through a pivot and can be unfolded and folded, and an associated accessory ( 14, 24 ). The associated accessory can transform the working state from a folding state to an unfolding state. When the first work accessory and the second work accessory are both folded, the associated accessory does not prevent any work accessory from unfolding; and when one of the two work accessories is unfolded and the other one is folded, the associated accessory prevents the other one from unfolding, so as to ensure that only one work accessory can be unfolded during use, thereby eliminating the safety risk caused by unfolding multiple work accessories at the same time.

First claim

The invention claimed is:

1. A manual tool capable of unfolding only one work accessory, comprises a handle, a first work accessory and a second work accessory; the first work accessory and the second work accessory are connected to the handle through at least one pivot and are capable of folding and unfolding; wherein an associated accessory is arranged for a working state of the first work accessory and the second work accessory to transform from a folding state to an unfolding state, the folding state being that both the first and second work accessory are folded, the unfolding state being that one of the first work accessory and the second work accessory is unfolded while the other one is folded; in the folding state, the associated accessory does not prevent any work accessory from unfolding; while in the unfolding state, the associated accessory prevents the other one from unfolding;
said at least one pivot comprises a first pivot and a second pivot, the first work accessory ( 12 ) is rotationally arranged to said first pivot ( 18 ) located at one end of the handle ( 11 ) through a first axle sleeve ( 15 ) fixed on the end of the first work accessory, and an outer diameter of the first axle sleeve ( 15 ) is provided with a small diameter part ( 16 ) and a large diameter part ( 17 ); the second work accessory ( 13 ) is rotationally arranged to said second pivot ( 112 ) located at the other end of the handle ( 11 ) through a second axle sleeve ( 19 ) fixed on the end of the second work accessory, and an outer diameter of the second axle sleeve ( 19 ) is provided with a small diameter part ( 110 ) and a large diameter part ( 111 );
the associated accessory ( 14 ) is a pull rod which is set inside the handle ( 11 ) and able to move along its length, the pull rod is provided with through holes surrounding the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ), and the through holes are provided with a first locking wall ( 115 ) outside the first axle sleeve ( 15 ), as well as a second locking wall ( 116 ) outside the second axle sleeve ( 19 );
while in the folding state, the small diameter part ( 16 ) of the first axle sleeve ( 15 ) faces the first locking wall ( 115 ) and the small diameter part ( 110 ) of the second axle sleeve ( 19 ) faces the second locking wall ( 116 ), to allow the pull rod to move along its length without preventing any work accessory from unfolding;
while in the unfolding state, the second work accessory ( 13 ) unfolds to drive the first axle sleeve ( 19 ) to rotate, the small diameter part ( 16 ) of the first axle sleeve ( 15 ) faces the first locking wall ( 15 ), and the large diameter part ( 111 ) of the second axle sleeve ( 19 ) turns to face the second locking wall ( 116 ), to prevent the pull rod from moving along its length to prevent the first work accessory from unfolding; or the first work accessory ( 12 ) unfolds to drive the first axle sleeve ( 15 ) to rotate, the large diameter part ( 17 ) of the first axle sleeve ( 15 ) turns to face the first locking wall ( 115 ) and the small diameter part ( 110 ) of the second axle sleeve ( 19 ) faces the second locking wall ( 116 ), to prevent the pull rod from moving along its length to prevent the second work accessory from unfolding.

2. The manual tool capable of unfolding only one work accessory according to claim 1 , wherein a distance between the first locking wall ( 115 ) and the second locking wall ( 116 ) is larger than or equal to a utmost outer distance between the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ) when the large diameter part ( 17 ) of first axle sleeve ( 15 ) faces the first locking wall ( 115 ) while the small diameter part ( 110 ) of the second axle sleeve ( 19 ) faces the second locking wall ( 116 ); the distance is also larger than or equal to the utmost outer length between the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ) when the large diameter part ( 111 ) of the second axle sleeve ( 19 ) faces the second locking wall ( 116 ) while the small diameter part ( 16 ) of the second axle sleeve ( 15 ) faces the second locking wall ( 115 ); and the distance is also smaller than the utmost outer length between the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ) when the large diameter part ( 17 ) of first axle sleeve ( 15 ) faces the first locking wall ( 115 ) and the large diameter part ( 111 ) of the second axle sleeve ( 19 ) faces the second locking wall ( 116 ).

3. The manual tool capable of unfolding only one work accessory according to claim 2 , wherein the through holes are a first through hole ( 113 ) and a second through hole ( 114 ) being respectively located on the two end of the pull rod, the first through hole ( 113 ) and the second through hole ( 114 ) are surrounding the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ) respectively, the first through hole ( 113 ) is provided with the first locking wall ( 115 ) on the outside and the second through hole ( 114 ) is provided with the second locking wall ( 116 ) on the outside.

4. The manual tool capable of unfolding only one work accessory according to claim 3 , wherein the large diameter part ( 17 ) of the first axle sleeve ( 15 ) and the large diameter part ( 111 ) of the second axle sleeve ( 19 ) are cylinder; the small diameter part ( 16 ) of the first axle sleeve ( 15 ) and the small diameter part ( 110 ) of the second axle sleeve ( 19 ) are longitudinal plane cut from a cylinder; the first locking wall ( 115 ) and the second locking wall ( 116 ) are plane.

5. The manual tool capable of unfolding only one work accessory according to claim 4 , wherein the pull rod is flake-like; the first work accessory ( 12 ) and the second work accessory ( 13 ) are respectively provided with a hole corresponding to the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ), and surround the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ) to drive the first axle sleeve ( 15 ) and the second axle sleeve ( 19 ) to rotate when the first work accessory ( 12 ) and the second work accessory ( 13 ) unfold or fold.

6. The manual tool capable of unfolding only one work accessory according to claim 5 , wherein the first work accessory or the second work accessory is a blade mounting frame with a replaceable blade.

Assignees

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

Inventors

• Wang Weiyi

Classifications

• B26B11/001 Primary

  of the Swiss-knife type · CPC title

• B26B1/044

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

• B25F1/04 Primary

  wherein the elements are brought into working positions by a pivoting or sliding movement · CPC title

• B26B1/02

  with pivoted blade · CPC title