Screwdriver

Patent metadata

Field	Value
Publication number	US-9844861-B2
Application number	US-201213582102-A
Country	US
Kind code	B2
Filing date	Jan 11, 2012
Priority date	Jan 11, 2011
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A screwdriver, including driver bit sleeve, revolving wheel-shaped driver bit holder and pushrod, the revolving wheel-shaped screwdriver bit holder is rotatably arranged at the rear side of the driver bit sleeve, the revolving wheel-shaped driver bit holder is distributed with axial containing hole containing driver bit and the containing hole can be turned to axially coincide with the inner hole of the driver bit sleeve; pushrod is arranged at the rear side of the revolving wheel-shaped driver bit holder and axially coincides with the inner hole of the driver bit sleeve, the inner hole of the driver bit sleeve includes torque transmission segment at the front part and guiding segment at the rear part, the hole wall of the guiding segment is arranged as guiding surface; and it can also include handle, pushbutton set, pushrod which extends into one of containing holes of driver bit holder when pushbutton set is positioned at first positioning portion of the front part of slideway on the handle, pushing the driver bit in the containing hole toward the driver bit sleeve on the handle until the driver bit extends out of the driver bit sleeve, and the pushrod is positioned at the rear side of the driver bit holder when the pushbutton set is positioned at the rear part of the slideway on the handle and take the corresponding driver bit back into the corresponding containing hole. Fewer constituent parts, simple structured, easy to replace the driver bit.

First claim

What is claimed is:

1. A screwdriver, including a driver bit sleeve, wherein an inner hole of said driver bit sleeve is arranged to receive a driver bit in a working position, the inner hole includes a torque transmission segment located in a front part and a first guiding segment located in a rear part, and an inner wall of said first guiding segment is arranged as a guiding surface;
wherein the screwdriver also includes a revolving wheel-shaped driver bit holder, said revolving wheel-shaped driver bit holder is rotatably arranged at a rear side of said driver bit sleeve, on said revolving wheel-shaped driver bit holder is a distributed axial containing hole which contains a driver bit, said containing hole can rotate to axially coincide with the inner hole of said driver bit sleeve, and a front end of said containing hole is arranged with flaring;
wherein a front side of said revolving wheel-shaped driver bit holder is arranged with a ratchet structure, said driver bit sleeve is arranged on said ratchet structure, a through hole which is co-axial with the inner hole of said driver bit sleeve is arranged on said ratchet structure, said containing hole can rotate to axially coincide with said through hole and the inner hole of said driver bit sleeve; a front end of said through hole is arranged with flaring.

2. The screwdriver according to claim 1 , wherein said guiding surface can be a conical surface which defines said first guiding segment into a conical hole segment, and the diameter of a rear end of said conical hole segment is larger than that of a front end thereof.

3. The screwdriver according to claim 1 , wherein the inner hole of said driver bit sleeve includes a transition surface which is located between said torque transmission segment and said first guiding segment, and which connects said torque transmission segment and said first guiding segment.

4. The screwdriver according to claim 1 , wherein a rear end of said through hole is arranged as a second guiding segment.

5. The screwdriver according to claim 4 , wherein said second guiding segment arranged at said rear end of said through hole is a conical hole segment.

6. The screwdriver according claim 1 , wherein the screwdriver also includes a pushrod which can slide from a first position to a second position, when said pushrod is at said second position, said pushrod is located at a rear side of said revolving wheel-shaped driver bit holder and axially coincides with the inner hole of said driver bit sleeve.

7. The screwdriver according to claim 1 , wherein the screwdriver includes:
a handle having a front end of which is arranged with said driver bit sleeve, a slit which is arranged extending forward and backward is provided at a position located at the rear of said driver bit sleeve on said handle, a mounting position is visible through said slit, a slideway is arranged at the edge of said slit, a first positioning portion is arranged at a front part of said slideway;
said revolving wheel-shaped driver bit holder has an axial direction that is along the same front-rear direction as that of said handle and is rotatably mounted at said mounting position;
a pushrod, which is disposed in said handle along the front-rear direction and axially coincides with the inner hole of said driver bit sleeve;
a pushbutton set, which is assembled with said pushrod and slidably mates on said slideway, and which can be positioned at said first positioning portion;
wherein said containing hole is a plurality of containing holes, when said pushbutton set is positioned at said first positioning portion, said pushrod gets into one of said plurality of containing holes of said revolving wheel-shaped driver bit holder, pushing a driver bit in said one of said plurality of said containing holes toward said driver bit sleeve until said driver bit extends out of said driver bit sleeve, when said pushbutton set is positioned at a rear part of said slideway, said pushrod is positioned at a rear side of said revolving wheel-shaped driver bit holder.

8. The screwdriver according to claim 7 , wherein the front end of said handle is arranged with said ratchet structure.

9. The screwdriver according to claim 8 , wherein said ratchet structure includes a pawl seat, a ratchet sleeve and a rotary sleeve:
said pawl seat is fixed at the front end of said handle, said pawl seat is arranged with two opposite swingable pawls and thumb piece for controlling the position status of said two opposite swingable pawls, said thumb piece has two thumb nubble corresponding to said two opposite swingable pawls, respectively;
said ratchet sleeve is set on said pawl seat for gearing with said pawl;
said rotary sleeve is set at an outside of said pawl seat and connects said thumb piece;
said driver bit sleeve is arranged on said ratchet sleeve, and said through hole is provided on said pawl seat.

10. The screwdriver according to claim 9 , further comprising an inner wall of said rotary sleeve that has three positioning recesses, wherein said pawl seat is arranged with positioning a pin tumbler thereon, and wherein said positioning pin tumbler is supported by an elastic element and located in one of said three positioning recesses.

11. The screwdriver according to claim 9 , wherein said opposite swingable two pawls have an elastic element supported in between, which keeps said two opposite swingable pawls open and leaning toward said ratchet sleeve.

12. The screwdriver according to claim 7 , wherein said front end of said handle is arranged with a structural member, and wherein said driver bit sleeve is arranged on said structural member.

13. The screwdriver according to claim 7 , wherein said slideway is metallic piece.

14. The screwdriver according to claim 7 , wherein said first positioning portion is a gap arranged on said slideway.

15. The screwdriver according to claim 14 , further comprising a tail part of said pushrod that extends toward a direction of said slideway and out of a base portion, wherein said pushbutton set includes a locking plate, a touch button and an elastic element, wherein said locking plate is moveably disposed at said base portion along the direction, along which said base portion extends, and within a moveable area thereof said locking plate can snap into said gap and detach from said gap, wherein said elastic element is positioned between said locking plate and said base portion, pressing said locking plate toward inside of said gap with elastic force, and wherein said touch button is assembled on said base portion slidably in front-rear direction and is arranged thereon with a touch portion which forces said locking plate to act.

16. The screwdriver according to claim 15 , further comprising a supporting portion which supports said pushrod that is arranged in said handle along the direction, along which said slideway extends.

17. The screwdriver according to claim 16 , wherein the rear part of said slideway is arranged with a second positioning portion for positioning said pushbutton set.

18. The screwdriver according to claim 17 , wherein a structure of said second positioning portion is identical to a structure of said first positioning portion, said pushrod is located at the rear side of said revolving wheel-shaped driver bit holder when said pushbutton set is positioned at said second positioning portion.

19. The screwdriver according to claim 14 , further comprising a tail part of said pushrod that extends toward a direction of said slideway and out of a base portion, wherein said pushbutto

Assignees

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

Inventors

• Wang Weiyi

Classifications

• B25G1/085

  for screwdrivers, wrenches or spanners · CPC title

• B25B13/465

  a pawl engaging an internally toothed ring · CPC title

• B25B15/00

  Screwdrivers (hand-driven gear-operated B25B17/00; impact screwdrivers B25B19/00; portable power-driven B25B21/00 {; screwdrivers specially adapted for osteosynthesis A61B17/8875}) · CPC title

• B25B15/04 Primary

  with ratchet action · CPC title

• B25B23/0035

  Connection means between socket or screwdriver bit and tool · CPC title