Rotation tool

Patent metadata

Field	Value
Publication number	US-11534896-B2
Application number	US-202017122237-A
Country	US
Kind code	B2
Filing date	Dec 15, 2020
Priority date	Dec 19, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

The invention aims to provide a rotation tool enabling work without obstructing a view of an operator and facilitating fine-adjustment for the tool. A rotation tool includes a flexible shaft including a tool portion at one end and a grip portion at the other end; and a cylindrical exterior body including curved portion on at least a part thereof, wherein a spiral protrusion is formed on at least a part of the shaft and a spiral groove is formed on at least a part of the curved portion, and the shaft is configured to be movable inside the exterior body by screwing the spiral protrusion and the spiral groove to each other.

First claim

What is claimed is:

1. A rotation tool comprising:
a flexible shaft including a tool portion at one end and a grip portion at the other end; and
a cylindrical exterior body including a curved portion on at least a part thereof, wherein
a spiral protrusion is formed on at least a part of the shaft and a spiral groove is formed on at least a part of the curved portion, and the shaft is configured to be movable inside the exterior body by screwing the spiral protrusion and the spiral groove to each other, and
wherein a pitch in the spiral groove increases as being far away from a center point of a curvature of the curved portion.

2. The rotation tool according to claim 1 , wherein when the spiral protrusion and the spiral groove are screwed to each other, respective threads facing each other are formed at any same inclination angle.

3. The rotation tool according to claim 1 , wherein
when the spiral protrusion and the spiral groove are screwed to each other, respective threads facing each other are formed at any same inclination angle.

4. The rotation tool according to claim 1 , wherein the tool portion is formed to be detachable from the shaft.

5. The rotation tool according to claim 1 , wherein the tool portion is formed integrally with the shaft.

6. The rotation tool according to claim 1 , wherein a stopper member configured to prevent a movement of the shaft is provided on at least one of the shaft and the exterior body.

7. The rotation tool according to claim 1 , wherein
the tool portion is formed to be detachable from the shaft, and
a stopper member configured to prevent a movement of the shaft is provided on at least one of the shaft and the exterior body.

8. The rotation tool according to claim 1 , wherein a detachable holding member is provided at any position on an outer circumference of the exterior body.

9. The rotation tool according to claim 1 , wherein the spiral groove is formed from both ends of the exterior body to any length, and the spiral groove is not provided in an intermediate portion of the exterior body.

10. The rotation tool according to claim 1 , wherein
the spiral groove is formed from both ends of the exterior body to any length, and the spiral groove is not provided in an intermediate portion of the exterior body.

11. The rotation tool according to claim 1 , wherein
when the spiral protrusion and the spiral groove are screwed to each other, respective threads facing each other are formed at any same inclination angle, and
the spiral groove is formed from both ends of the exterior body to any length, and the spiral groove is not provided in an intermediate portion of the exterior body.

12. The rotation tool according to claim 1 , wherein
when the spiral protrusion and the spiral groove are screwed to each other, respective threads facing each other are formed at any same inclination angle, and
the spiral groove is formed from both ends of the exterior body to any length, and the spiral groove is not provided in an intermediate portion of the exterior body.

Assignees

• Seiko Instr Inc

Inventors

• Suzuki Makoto
• Shinohara Jun

Classifications

• B25B23/0028

  Angular adjustment means between tool head and handle · CPC title

• B25B13/48 Primary

  for special purposes · CPC title

• A61C1/18

  Flexible shafts; Clutches or the like; {Bearings or lubricating arrangements; Drives or transmissions}(flexible shafts in general F16C; clutches in general F16D) · CPC title

• B25B23/0021

  Prolongations interposed between handle and tool · CPC title

• A61C5/42 Primary

  Files for root canals; Handgrips or guiding means therefor · CPC title