Screwdriver with rotary cartridge including replaceable bits therein

• US 20080190249A1
• Filed: 01/22/2008
• Published: 08/14/2008
• Est. Priority Date: 02/12/2007
• Status: Active Grant

• Current Assignee: Hong-Chow Yu, Kae Mae Enterprise Co., Ltd.
• Original Assignee: Hong-Chow Yu, Kae Mae Enterprise Co., Ltd.
• Inventors: Yu, Hong-Chow
• Granted Patent: US 7,565,852 B2
• Time in Patent Office: Days
• US Class Current: 81/177.4
• CPC Class Codes: B25B 15/02 operated by rotating the handle
• CPC Class Codes: B25G 1/085 for screwdrivers, wrenches or spanners

Abstract

A screwdriver with rotary cartridge including replaceable bits therein comprises a body including a cavity portion formed at one end thereof for receiving a rotary cartridge having grooves therein, the cavity portion including a mounting tube provided at front end thereof and communicating therewith, the grooves rotatably corresponding to the mounting tube, the cavity portion also including a slide seat secured at the rear end thereof and communicating therewith, the slide seat including a grip disposed thereon and having a push shank fixed at the front end thereof, wherein a slidable piece is attached in the cavity portion for being pushed by the push shank and includes a guide slot formed thereon, at one end of the rotary cartridge are extendedly defined with locking protrusions, on a rotating shaft of the rotary cartridge is pivotally secured an actuation member for rotatably retaining the corresponding locking protrusions, the actuation member includes a guiding tab disposed thereon for being fitted in the guide slot.

Claims

1. A screwdriver with rotary cartridge including replaceable bits therein comprising:

a body including a cavity portion formed at one end thereof for receiving a rotary cartridge having a plurality of grooves therein, said cavity portion including a mounting tube provided at front end thereof and communicating therewith, said grooves of said rotary cartridge rotatably corresponding to said mounting tube, said cavity portion also including a slide seat secured at the rear end thereof and communicating therewith, and said slide seat including a grip disposed thereon and having a push shank fixed at the front end thereof, wherein a slidable piece is attached in said cavity portion for being pushed by said push shank and includes a guide slot formed thereon, at one end of said rotary cartridge are extendedly defined with a plurality of locking protrusions, on a rotating shaft of said rotary cartridge is pivotally secured an actuation member for rotatably retaining one of said corresponding locking protrusions, said actuation member includes a guiding tab disposed thereon for being fitted in said guide slot of said slidable piece.

2. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 1, wherein on the outer side of said rotary cartridge are provided with a plurality of retaining slots, and said slidable piece includes a resilient piece formed thereon and having a retaining boss for corresponding to said retaining slots.

3. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 1, wherein said rotary cartridge is pivotally fixed in a receiving member for being received in said cavity portion.

4. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 3, wherein said receiving member includes through openings formed at two ends thereof respectively and corresponding to said mounting tube.

5. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 1, wherein between said push shank and said slide seat is formed a confining structure.

6. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 5, wherein said confining structure includes a recess defined at the front end of said push shank and having a stop plane formed at the front end thereof and a guide plane formed at the rear end thereof, on said slide seat is arranged a confining chamber in which a limiting member for retaining said push shank is received.

7. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 6, wherein said limiting member is provided with a locking portion and a hooking portion.

8. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 1, wherein each of said locking protrusions includes an inclined plane formed thereon.

9. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 1, wherein said mounting tube includes a ratchet block fixed around the outer periphery thereof.

10. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 1, wherein said mounting tube also includes a polygon-bore segment arranged at the front end thereof, and a circular-bore segment formed at the rear end thereof and having a guiding device.

11. The screwdriver with rotary cartridge including replaceable bits therein as claimed in claim 10, wherein said guiding device includes a hole provided in said mounting tube and not passing through said circular-bore segment, said hole includes a ball mounted therein by an annular piece such that said ball resiliently extends into said circular-bore segment and corresponds to the flat position of said polygon-bore segment.