# US 2014/0196575 A1 · Screwdriver > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196575 A1 - Document ID: US20140196575A1 - Status: Published application - Kind: A1 - Application number: 13/582,102 - Filed: 2012-01-11 - Published: 2014-07-17 - Earliest claimed: 2011-01-11 - Assignees: Hangzhou Great Star Industrial Co., Ltd.; Hangzhou Great Star Tools Co., Ltd. - Inventors: Weiyi Wang - Web page: https://patentgrep.com/patent/US20140196575A1 ## CPC - B25B 15/04: with ratchet action - B25B 13/465: {a pawl engaging an internally toothed ring} - B25B 15/00: Screwdrivers (hand-driven gear-operated B25B17/00; impact screwdrivers B25B19/00; portable power-driven B25B21/00 {; screwdrivers specially adapted for osteosynthesis A61B17/8875}) - B25B 23/0035: {Connection means between socket or screwdriver bit and tool} - B25G 1/085: {for screwdrivers, wrenches or spanners} - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING - B25G: HANDLES FOR HAND IMPLEMENTS (attaching the blades or the like to handles of hand tools for soil working A01B1/22; handles of hand implements for harvesting A01D1/14; handles integral with brushware A46B) ## 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. ## Claims ### Claim 1 A screwdriver, including driver bit sleeve, wherein inner hole of said driver bit sleeve includes torque transmission segment located in front part and first guiding segment located in rear part, and hole wall of said first guiding segment is arranged as a guiding surface. ### Claim 2 (depends on 1) 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 rear end of said conical hole segment is larger than that of front end thereof. ### Claim 3 (depends on 1) The screwdriver according to claim 1, wherein inner hole of said driver bit sleeve includes 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. ### Claim 4 (depends on 1) The screwdriver according to claim 1, wherein the screwdriver also includes revolving wheel-shaped driver bit holder, said revolving wheel-shaped screwdriver bit holder is rotatably arranged at rear side of said driver bit sleeve, on said revolving wheel-shaped driver bit holder is distributed axial containing hole which contains driver bit, said containing hole can rotate to axially coincide with inner hole of said driver bit sleeve, and front end of said containing hole is arranged with flaring. ### Claim 5 (depends on 4) The screwdriver according to claim 4, wherein front side of said driver bit holder is arranged with ratchet structure, said driver bit sleeve is arranged on said ratchet structure, through hole which is co-axial with 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 inner hole of said driver bit sleeve. ### Claim 6 (depends on 5) The screwdriver according to claim 5, wherein front end of said through hole is arranged with flaring. ### Claim 7 (depends on 5) The screwdriver according to claim 5, wherein rear end of said through hole is arranged as second guiding segment. ### Claim 8 (depends on 7) The screwdriver according to claim 7, wherein said second guiding segment arranged at rear end of said through hole is a conical hole segment. ### Claim 9 (depends on 4) The screwdriver according claim 4, wherein the screwdriver also includes 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 rear side of said revolving wheel-shaped driver bit holder and axially coincides with inner hole of said driver bit sleeve. ### Claim 10 (depends on 1) The screwdriver according to claim 1, wherein the screwdriver includes: handle, the front end of which is arranged with said driver bit sleeve, 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, mounting position is visible through said slit, slideway is arranged at the edge of said slit, first positioning portion is arranged at the front part of said slideway; revolving wheel-shaped driver bit holder, the axial direction thereof is along the same front-rear direction as that of said handle and is rotatably mounted at said mounting position, on said revolving wheel-shaped driver bit holder is distributed axial containing hole thereon which contains driver bits, said containing holes can rotate to axially coincide with inner hole of said driver bit sleeve; pushrod, which is disposed in said handle along the front-rear direction and axially coincides with inner hole of said driver bit sleeve; pushbutton set, which is assembled with said pushrod and slidably mates on said slideway, and which can be positioned at said first positioning portion; when said pushbutton set is positioned at said first positioning portion, said pushrod gets into one of containing holes of said driver bit holder, pushing a driver bit in said containing hole toward said driver bit sleeve until said driver bit extends out of said driver bit sleeve, when said pushbutton set is positioned at the rear part of said slideway, said pushrod is positioned at rear side of said driver bit holder. ### Claim 11 (depends on 10) The screwdriver according to claim 10, wherein front end of said handle is arranged with ratchet structure, said driver bit sleeve is arranged on said ratchet structure, through hole which is co-axial with 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 inner hole of said driver bit sleeve. ### Claim 12 (depends on 11) The screwdriver according to claim 11, wherein said ratchet structure includes pawl seat, ratchet sleeve and 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 sail two pawls, said thumb piece has two thumb nubble corresponding to said two pawls, respectively; said ratchet sleeve is set on said pawl seat for gearing with said pawl; said rotary sleeve is set at the 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. ### Claim 13 (depends on 12) The screwdriver according to claim 12, wherein inner wall of said rotary sleeve has three positioning recesses, said pawl seat is arranged with positioning pin tumbler thereon, said positioning pin tumbler is supported by elastic element and located in said positioning recess. ### Claim 14 (depends on 12) The screwdriver according to claim 12, wherein two pawls have an elastic element supported in between, which keeps said two pawls open and leaning toward said ratchet sleeve. ### Claim 15 (depends on 10) The screwdriver according to claim 10, wherein front end of said handle is arranged with a structural member, said driver bit sleeve is arranged on said structural member. ### Claim 16 (depends on 10) The screwdriver according to claim 10, wherein said slideway is metallic piece. ### Claim 17 (depends on 10) The screwdriver according to claim 10, wherein said first positioning portion is a gap arranged on said slideway. ### Claim 18 (depends on 17) The screwdriver according to claim 17, wherein tail part of said pushrod extends toward the direction of said slideway and out of base portion, said pushbutton set includes locking plate, touch button and elastic element, said locking plate is moveably disposed at said base portion along the direction, along which said base portion extends, and within the moveable area thereof said locking plate can snap into said gap and detach from said gap, 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, said touch button is assembled on said base portion slidably in front-rear direction and is arranged thereon with touch portion which forces said locking plate to act. ### Claim 19 (depends on 17) The screwdriver according to claim 17, wherein tail part of said pushrod extends toward the direction of said slideway and out of base portion, said pushbutton set includes touch button and elastic element, said touch button is arranged with locking stop flange thereon, said touch button is moveably disposed at said base portion along the direction, along which said base portion extends; and within the moveable area of said touch button, said locking stop flange can snap into said gap and detach from said gap, said elastic element is positioned between said touch button and said base portion, pressing said locking stop flange toward inside of said gap with elastic force. ### Claim 20 (depends on 18) The screwdriver according to claim 18, wherein supporting portion which supports said pushrod is arranged in said handle along the direction, along which said slideway extends. ### Claim 21 (depends on 10) The screwdriver according to claim 10, wherein the rear part of said slideway is arranged with second positioning portion for positioning said pushbutton set. ### Claim 22 (depends on 20) The screwdriver according to claim 20, wherein the rear part of said slideway is arranged with second positioning portion for positioning said pushbutton set. ### Claim 23 (depends on 21) The screwdriver according to claim 21, wherein the structure of said second positioning portion is identical to the structure of said first positioning portion, said pushrod is located at the rear side of said driver bit holder when said pushbutton set is positioned at said second positioning portion. ### Claim 24 (depends on 22) The screwdriver according to claim 22, wherein the structure of said second positioning portion is identical to the structure of said first positioning portion, said pushrod is located at the rear side of said driver bit holder when said pushbutton set is positioned at said second positioning portion. ### Claim 25 (depends on 10) The screwdriver according to claim 10, wherein front wall of said mounting position and front end of said driver bit holder, and rear wall of said mounting position and rear end of said driver bit holder, are arranged with pit and telescopic shaft heard, respectively; elastic element is supported at the rear end of said telescopic shaft head and said telescopic shaft head is located in corresponding pit to actualize the mounting of said driver bit holder at said mounting position. ### Claim 26 (depends on 10) The screwdriver according to claim 10, wherein the front wall or/and the rear wall of said mounting position, and the front end or/and the rear end of said driver bit holder are arranged with positioning pin tumbler and positioning recess, respectively, elastic element is supported at the rear end of said positioning pin tumbler, said positioning pin tumbler is located in said positioning recess to actualize the positioning of said driver bit holder on said handle. ### Claim 27 (depends on 10) The screwdriver according to claim 10, wherein the inner wall of said containing hole has elastic structure. ### Claim 28 (depends on 10) The screwdriver according to claim 10, wherein said driver bit holder has driver bit sign on positions that correspond to each containing hole. ### Claim 29 (depends on 10) The screwdriver according to claim 10, wherein said driver bit holder is transparent. ### Claim 30 (depends on 10) The screwdriver according to claim 10, wherein said handle is arranged with containing portion thereon for storing backup driver bit holder. ### Claim 31 (depends on 10) The screwdriver according to claim 10, wherein said handle is arranged with backup driver bit storage holder thereon. ### Claim 32 (depends on 10) The screwdriver according to claim 10, wherein said handle has gripping portion extending toward the side of said pushrod. ### Claim 33 (depends on 10) The screwdriver according to claim 10, wherein front end of said pushrod and/or said driver bit are arranged with engagement structures thereon for the engagement of said both, said pushrod is located at the rear side of said driver bit holder when said pushbutton set is located at the rear part of said slideway, and brings the corresponding driver bit back into corresponding containing hole relying on said engagement structures. ### Claim 34 (depends on 33) The screwdriver according to claim 33, wherein said engagement structures are magnetic structures provided for both of front end of said pushrod and/or said driver bit to adhere to. ### Claim 35 (depends on 33) The screwdriver according to claim 33, wherein said engagement structures are tenon and mortise arranged at front end of said pushrod and rear end of said driver bit respectively. ### Claim 36 (depends on 10) The screwdriver according to claim 10, wherein rear end of said containing hole has blocking portion. ### Claim 37 (depends on 10) The screwdriver according to claim 10, wherein a slit gap is arranged between rear end of said driver bit holder and rear wall of said mounting position, front end of said pushrod coincides with said slit gap when said pushbutton set is located at rear part of said slideway. ### Claim 38 A screwdriver, including handle, the front end of which is arranged with driver bit sleeve, wherein: inner hole of said driver bit sleeve includes torque transmission segment located in the front part thereof and first guiding segment located in the rear part thereof, the hole wall of said first guiding segment is arranged as guiding surface; further includes revolving wheel-shaped driver bit holder, said revolving wheel-shaped bit holder is rotatably arranged at rear side of said driver bit sleeve, on said revolving wheel-shaped driver bit holder is distributed axial containing hole which contains driver bit, said containing hole can rotate to axially coincide with inner hole of said driver bit sleeve; front side of said driver bit holder is arranged with ratchet structure, said driver bit sleeve is arranged on said ratchet structure, through hole which is co-axial with 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 inner hole of said driver bit sleeve, front end of said through hole is arranged with flaring, rear end of said through hole is arranged as second guiding segment. ### Claim 39 (depends on 38) The screwdriver according to claim 38, wherein front end of said containing hole on said revolving wheel-shaped driver bit holder is arranged with flaring, and rear end of said containing hole has blocking portion. ### Claim 40 (depends on 38) The screwdriver according to claim 38, wherein said handle is a revolver type handle or a straight handle.