Retractable pliers

Patent metadata

Field	Value
Publication number	US-9636805-B2
Application number	US-201314369678-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 16, 2012
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

The present invention discloses a pair of retractable pliers, comprising a jaw body which comprises a first and a second jaw part that are articulated together via an articulated shaft, and a handle body which comprises a first and a second internal housing. The first and the second jaw part each have a pliers head and a connection part, and the connection parts of the first and the second jaw part are slidably connected to the first and the second internal housing respectively. The pair of retractable pliers also comprises a locking structure which is arranged on the connection parts of the first and the second jaw part and which is capable of fixing the connection parts of the first and the second jaw part together. Once the locking structure is open, the pliers heads can open automatically for convenience of use.

First claim

The invention claimed is:

1. A pair of retractable pliers, comprising a jaw body and a handle body, wherein the jaw body comprises a first jaw part and a second jaw part which are articulated together via an articulated shaft, the handle body comprises a first internal housing and a second internal housing, the first jaw part and the second jaw part each have a pliers head and a connection part, and the connection parts of the first jaw part and the second jaw part are slidably connected to the first internal housing and the second internal housing respectively, characterized in that the pair of retractable pliers further comprises a locking structure arranged on the connection parts of the first jaw part and the second jaw part and capable of fixing the connection parts of the first jaw part and the second jaw part together; wherein the jaw body further comprises one torsion spring which is arranged at the articulated shaft between the first jaw part and the second jaw part; wherein the locking structure comprises a locking block with a rear locking hook, the locking block is arranged on the connection part of the first jaw part, the locking structure further comprises a rear locking hole which is arranged at the position on the connection part of the second jaw part corresponding to the position of the rear locking hook, and the rear locking hole and the rear locking hook can be matched to lock.

2. The pair of retractable pliers according to claim 1 , wherein the locking block further provides a front locking hook, a front locking hole is arranged on the bottom flank of the leading end of the first internal housing which is connected to the connection part of the first jaw part, and the front locking hole and the front locking hook of the locking block can be matched to lock.

3. The pair of retractable pliers according to claim 1 , wherein the locking block further comprises an upward extending control column, on the top of which a pushing block is arranged.

4. The pair of retractable pliers according to claim 3 , wherein the locking structure further comprises a screw, which fixes the locking block onto the inner side of the connecting part of the first jaw part by passing through a central hole in the locking block.

5. The pair of retractable pliers according to claim 4 , wherein the locking structure further comprises a locking block's torsion spring, which comprises a ring part set on the screw and is fixed onto the inner side of the connection part of the first jaw part together with the locking block; wherein the ring part of the locking block's torsion spring provides one elongated arm extending forward, the front end of the elongated arm provides a laterally extending arm, and the laterally extending part of the elongated arm is arranged on the front of the locking block and forms pressure on the front of the locking block.

6. The pair of retractable pliers according to claim 5 , wherein the rear locking hole is arranged in the extension part extending outward from the inner side of the connection part of the second jaw part.

7. The pair of retractable pliers according to claim 6 , wherein the locking structure further comprises one caging device, which is arranged beneath the rear locking hook of the locking block and whose position is at the same level with that of the rear locking hole; wherein the caging device consists of a caging pin, a pin fixing sleeve and a small spring, the small spring is installed in a installing hole arranged at the inner side of the connection part of the first jaw part, and the caging pin is fixed to the connection part of the first jaw part after being inserted into the installing holes and being sheathed with the pin fixing sleeve.

8. The pair of retractable pliers according to claim 7 , wherein an angle is provided between the first internal housing and the second internal housing when the pliers heads are closed.

9. The pair of retractable pliers according to claim 8 , wherein the connection part of the first jaw part comprises one position biasing device, one end of which is movably connected to the connection part of the first jaw part, and the other end is slidably connected to the first internal housing.

10. The pair of retractable pliers according to claim 9 , wherein one elongated opening is arranged at a long-shaped bottom of the first internal housing, and the elongated opening is a guiding slot; the position biasing device comprising a connecting block, a connecting pin, a sliding block and at least one screw; a long-shaped hole being set on the side of the connecting block, and the connecting pin threading the long-shaped hole to be fixed with the connection part of the first jaw part; the connecting pin being capable of moving along the long axis inside the long-shaped hole; the bottom of the connecting block being located inside of the guiding slot, the sliding block being located outside of the guiding slot, and the connecting block and the sliding block being fixed together through said at least one screw and capable of sliding along the guiding slot.

11. The pair of retractable pliers according to claim 10 , wherein the connecting block provides two parallel flanks and a connecting wall which connects the two flanks together, and the inner edges of the flanks are semi-circular.

12. The pair of retractable pliers according to claim 10 , wherein the position biasing device is one sliding pin suite which comprises an internal pin and an external pin, and a slot arranged at a flank of the connection part of the first jaw part; wherein the internal pin is located in the external pin and its end extends into the guiding slot and is flexibly connected to the internal housing; the external pin being installed in the slot and capable of moving along the long axis of the slot to change its position to match the opening angle of the handle body.

13. The pair of retractable pliers according to claim 12 , wherein a fixing column with one end inserted in the guiding slot is arranged on the connection part of the first jaw part.

14. The pair of retractable pliers of claim 11 , wherein corresponding indentation is arranged at the corresponding position on the connection part of the first jaw part, the connection part of the first jaw part is embedded between the two flanks of the connecting block, and the connecting pin fixes the connecting block and the connection part of the first jaw part together by going through the symmetrical long-shaped holes on the two flanks and a through hole which is at the corresponding position on the connection part of the first jaw part.

15. The pair of retractable pliers according to claim 14 , wherein the position biasing device further comprises one inner sliding block, which is arranged in the guiding slot, flushes with the guiding slot, and is arranged between the connecting block and the sliding block.

Assignees

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

Inventors

• Wang Min

Classifications

• B25F1/04

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

• B25B7/18 Primary

  Adjusting means for the operating arms · CPC title

• B25G1/063

  for screwdrivers, wrenches or spanners · CPC title

• B25F1/003

  of pliers'-, scissors'- or wrench-type with at least one movable jaw (B25F1/006 takes precedence) · CPC title