GB2393413A - Exchangeable work assembly of a screwdriver - Google Patents
Exchangeable work assembly of a screwdriver Download PDFInfo
- Publication number
- GB2393413A GB2393413A GB0222669A GB0222669A GB2393413A GB 2393413 A GB2393413 A GB 2393413A GB 0222669 A GB0222669 A GB 0222669A GB 0222669 A GB0222669 A GB 0222669A GB 2393413 A GB2393413 A GB 2393413A
- Authority
- GB
- United Kingdom
- Prior art keywords
- block
- polygonal
- detaching
- barrel
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
An exchangeable work assembly of a screwdriver includes a connector 14 partially received in the shank 42 of the screwdriver 4 and including a polygonal block and the polygonal stub longitudinally extending from one end of the polygonal block. The polygonal stub is received in the shank 42. A first detaching block 25 has a polygonal hole 251 for receiving the polygonal block for detaching the connector 14 from the shank 42 after rotation. A barrel 15 is connected to the polygonal block and has a polygonal hole 151 for receiving the polygonal block.
Description
- 1 239341 3
EXCHANGEABLE WORK ASSEMBLY OF A SCREWDRIVER AND THE
METHOD OF USING THE ASSEMBLY
The present invention relates to an exchangeable work assembly and, more particularly, to an exchangeable work assembly of a screwdriver and the 5 method of using the assembly.
A conventional screwdriver in accordance with the prior art usually
comprises a handle, a shank securely and longitudinally inserted into the handle for connecting to a work assembly. The work assembly includes a connector connected to a free end of the shank, a socket partially receiving the connector and 10 a tip partially inserted in the socket for driving a work piece. The work assembly of the screwdriver can be exchanged for various work pieces. However, the user must exchange the work assembly with his fingers so that the work assembly will dirty the user's finger and the sweat on the user's fingers making the work assembly rusty.
15 A main objective of the present invention is to provide an exchangeable work assembly of a screwdriver and a method of using the assembly.
To achieve the objective, the method uses the polygonal shape of an element and a polygonal hole in another element and promotes the friction between the two elements by rotation to make the inner periphery of the hole 20 securely abut the outer periphery of the first element.
An exchangeable work assembly of a screwdriver in accordance with the present invention comprises a connector partially received in the shank of the screwdriver and including a polygonal block and a polygonal stub longitudinally extending from one end of the polygonal block. The polygonal stub is received in 25 the shank of the screwdriver. A first detaching block has a polygonal hole for selectively receiving the polygonal block of the connector for detaching the connector from the shank after rotating. A barrel is connected to the polygonal block of the connector and has a polygonal hole for receiving the polygonal block of the connector. A second detaching block is selectively connected to the barrel 30 and has a hole for partially receiving the barrel for detaching the barrel from the connector after rotating.
With the invention, a user's fingers never touch the tip or the barrel so that the used tip and the barrel do not dirty user's hand and the sweat on the user's fingers should not make the work assembly rusty.
In the accompanying drawings: Fig. 1 is an exploded perspective view of a first embodiment of an exchangeable work assembly of a screwdriver in accordance with the present invention; 5 Fig. 2 illustrates another detaching block for detaching the connector of Fig. l; Fig. 3 is an operational plan view of the detaching block in Fig. 2; Fig. 4 is another operational plan view of the detaching block in Fig. 2 when the detaching block is rotated; 10 Fig. 5 is an operational plan view of the detaching block in Fig. 1; Fig. 6 is another operational plan view of the detaching block in Fig. 1 when the detaching block is rotated; Fig. 7 illustrates another embodiment of the detaching block for detaching a tip; 15 Fig. 8 is a plan view of the detaching block in Fig. 7; Fig. 9 is an operational plan view of the detaching block in Fig. 7; Fig. 10 is another operational plan view of the detaching block in Fig. 7 when the detaching block is rotated.
Fig. 11 illustrates yet another embodiment of the detaching block for 20 detaching a tip; Fig. 12 is a plan view of the detaching block in Fig. 11; Fig. 13 illustrates a further embodiment of the detaching block for detaching a tip; Fig. 14 is an axial sectional view of the detaching block in Fig. 13; 25 Fig. 15 is another sectional view of the detaching block in Fig. 13 when the detaching block is rotated above thirty degrees; Fig. 16 illustrates another embodiment of the barrel in Fig. I and the detaching block for detaching the barrel; Fig. 17 is yet another embodiment of the detaching block for detaching a 30 tip; Fig. 18 is a plan view of the detaching block in Fig. 17; Fig. 19 is an operational plan view of the detaching block in Fig. 17; and Fig. 20 is another operational top plan view of the detaching block in Fig. 17 when the detaching block is rotated.
Referring to the drawings and initially to Figs. 1-6, a screwdriver 4 usually comprises a handle 41, a shank 42 with a first end securely longitudinally inserted into the handle 41 and a second end having a polygonal hole (not numbered) longitudinal defined in the shank 42, and an exchangeable work 5 assembly attached to the second, free end of the shank 42. In the preferred embodiment, the polygonal hole is a hexagonal hole.
The exchangeable work assembly of the present invention comprises a connector 14 partially received in the polygonal hole in the shank 42 of the screwdriver. The connector 14 comprises a polygonal block (not numbered) and 10 the polygonal stub (not numbered) longitudinally extending from one end of the polygonal block. In the preferred embodiment of the present invention, the polygonal block is cubic, and the stub is hexagonal and corresponds to the polygonal hole in the shank 42. The polygonal block has four sides and one of the sides has a steel ball 144 mounted in the polygonal block. The steel ball 144 15 partially extends out of the outer periphery of the polygonal block. A first barrel 15 is mounted to the polygonal block. This first barrel 15 has a polygonal through hole 151 longitudinally defined in the first barrel 15 and a series of notches 152 longitudinally defined in the outer periphery of the first barrel 15. The polygonal hole 151 in the barrel 15 is a cubic hole that is dimensioned to receive the 20 polygonal block of the connector 14. A first detaching block 25 includes a through hole 251 dimensioned to partially receive the first barrel 15 and having a series of V-shaped protrusions 252 longitudinally extending along an inner periphery of the through hole 251 in the first detaching block 25. Each protrusion 252 is complementary to a corresponding one of the series of notches 152 of the first 25 barrel 15.
A second detaching block 24 (Fig. 2) has a polygonal hole 241 dimensioned to receive the polygonal block of the connector 14. In a preferred embodiment of the present invention, the polygonal hole 241 in the second detaching block 24 is a cubic hole. The steel ball 144 abuts the inner periphery of 30 the polygonal hole 241 in the second detaching block 24 and the friction between the polygonal stub and the inner periphery of the polygonal hole in the shank 42 is greater than that between the polygonal block and the polygonal hole 241 in the second detaching block 24.
To detach the connector 14 from the second detaching block 24, the shank
42 is moved to make the polygonal hole in the second end of the shank 42 receiving the polygonal stub of the connector 14, then the shank 42 is moved along an opposite direction and the connector 14 is detached from the second detaching block 24 because the friction between the polygonal stub and the inner periphery 5 of the polygonal hole in the shank 42 is greater than that between the polygonal block of the connector and the inner periphery of the polygonal hole 241 in the second detaching block 24. To detach the connector 14 from the shank 42, the detaching block 24 is moved to make the polygonal hole 241 receiving the polygonal block of the connector 14, and rotated to make the crest lines of the 10 polygonal block securely abutting the inner periphery of the polygonal hole 241 in the second detaching block 24 to promote the friction between the polygonal block of the connector 14 and the inner periphery of the polygonal hole 241 in the second detaching block 24. Then the second detaching block 24 is moved away from the shank 42 and the connector 14 is detached from the shank 42 and 15 received in the polygonal hole 241 when the friction between the polygonal block of the connector 14 and the inner periphery of the polygonal hole 241 in the second detaching block 24 is greater than that between the polygonal stub of the connector 14 and the inner periphery of the polygonal hole in the shank 42.
With reference to Fig. 1, the connector 14 is previously connected to the 20 shank 42 of the screwdriver 4. To detach the barrel 15 from the first detaching block 25, the polygonal block is moved and inserted into the polygonal hole 151 in the barrel 15. The friction between inner periphery of the polygonal hole in the shank 42 and the polygonal stub of the connector 14 is greater than that between the polygonal block of the connector 14 and the inner periphery of the polygonal 25 hole 151 in the barrel 15. Furthermore, the friction between the polygonal block of the connector 14 and the inner periphery of the polygonal hole 151 in the barrel 15 is greater than that between the outer periphery barrel 15 and the inner periphery of the through hole 251 in the first detaching block 25. Consequently, the barrel 15 is connected to the connector 14 and the polygonal block is received in the 30 polygonal hole 151 when the first detaching block 25 is moved away from the barrel 15.
To detach the barrel 15 from the connector 14, the first detaching block 25 is moved to make the through hole 251 receiving the barrel 15. The first detaching block 25 is rotated to make the V-shaped protrusions 252 abutting the sidewall of
the notches 152 in the outer periphery of the barrel 15 to promote the friction between the barrel 15 and the first detaching block 25. Then the first detaching block 25 is moved away from the connector 14 and the barrel 15 is detached from the connector 14 and received in the through hole 251 in the first detaching block 5 25 when the friction between the barrel 15 and the first detaching block 25 is greater than that between the barrel 15 and the connector 14.
With reference to Figs. 7-10, the exchangeable work assembly of the present invention further comprises a tip 16 partially received in the polygonal hole in the shank 42 and a third detaching block 26 for detaching the tip 16 from 10 the shank 42. The tip 16 has a first end received in the polygonal hole in the shank 42 and a second end for driving a work piece. The third detaching block 26 has a polygonal hole 261 defined to receive the second end of the tip 16 during detaching the tip 16 from the shank 42. The cross-section of the polygonal hole 261 corresponds to that of the tip 16 and the polygonal hole 261 and has an area 15 greater than that of the tip 16. The polygonal hole 261 in the third detaching block 26 has multiple sides connected to one another and each is convex relative to the third block 26. The polygonal hole 261 in the third detaching block 26 is tapered and the enlarged end of the polygonal hole 261 faces the tip 16. The method and the principle of detaching the tip from the shank 42 is the same as that of detaching 20 the connector 14 from the shank 42 and the tapered polygonal hole 261 prevents the tip 16 from detaching from the third detaching block 26 after the tip 16 is detached from the shank 42.
With reference to Figs. 11 and 12, these illustrate another embodiment of the third detaching block, wherein the detaching block 27 has a polygonal blind 25 hole 271 defined to receive the second end of the tip 16. A magnet 3 is mounted in an inner end of the polygonal blind hole 3 to capture the tip 16 and prevent the tip 16 from detaching from the detaching block 26 after being detached from the shank 42. In a preferred embodiment of the present invention, the magnet 3 in mounted in a bottom of the polygonal blind hole 271 in the detaching block 27.
30 The magnet 3 has a magnetic force greater than the friction between the tip 16 and the shank 42.
Figs. 13-15 illustrate another embodiment of the tip and the third detaching block. The tip 12, as shown in the Fig. 13, has an annular groove 123 defined in a middle portion of the tip 12. The detaching block 28 has a blind hole
281 dimensioned to receive the second end of the tip 12. The blind hole 281 in the detaching block 28 has a diameter slight greater than a length of each of the diagonals in the tip 12. The detaching block 28 includes two rods or sticks 282 laterally extending through detaching block 28 and partially laterally received in 5 the blind hole 281. A distance between the two sticks 282 is slightly greater than that between two opposite sides of the tip 12. To detach the tip 12 from the detaching block 28, the shank 42 is moved toward the tip 12 to make the tip 12 partially received in the polygonal hole in the shank 42 and moved the shank 42 away from the detaching block 28 after turning the tip 12 to make the two opposite 10 sides facing the two sticks 282. To detach the tip 12 from the shank 42, the detaching block 28 is moved toward the tip 12 to make the tip 12 partially received in the blind hole 281 and the annular groove 123 aligning with the two sticks 282.
The detaching block 28 is moved away from the shank 42 to detach the tip 12 from the shank 42 after rotating the detaching block 28 to make the two sticks 282 15 partially received in the annular groove 123 in the tip 12.
With reference to Fig. 16 this illustrates another embodiment of the barrel 15 and the first detaching block 25. The barrel 17 is cubic and includes four edges each having a cutout 173 longitudinally defined in the outer periphery of the barrel 17. The detaching block 29 has a hole 291 dimensioned to partially receive the 20 barrel 17. The hole 291 in the detaching block 29 has a cross-section corresponding to that of the barrel 17. The method of connecting the barrel 17 to the connector 14 and detaching the barrel 17 from the detaching block 29 is the same as using first detaching block 25.
Figs. 17-20 illustrate another embodiment of the tip 16 and the third 25 detaching block 26. The tip 11 includes multiple edges each having an indentation 113 defined near a middle portion of the tip l l. The detaching block 20 has a hole 201 dimensioned to partially receive the tip 11. The hole 201 in the detaching block 20 has a diameter slightly greater than a length of each of the diagonals of the tip 11. The detaching block 20 has multiple ratchets 202 formed on an inner 30 periphery of the hole 201 in the detaching block 20 and each corresponding to a corresponding one of the indentations 113.
To detach the tip 11 from the detaching block 20, the shank 42 is moved toward the tip 11 to make the tip 11 partially received in the shank 42. The shank 42 and the tip 11 are moved away from the detaching block 20 after rotating the tip
11 to make the sides of the tip 11 face the ratchet 202 in the hole 201. To detach the tip 11 from the shank 42, the detaching block 20 is moved toward the tip 11 to make the tip 11 partially received in the hole 201 in the detaching block 20. The detaching block 20 is rotated to engage the ratchet 202 with the indentations 113 in 5 the tip 11 so that the tip 11 remains in the hole 201 in the detaching block 20 after removing the shank 42 from the detaching block 20.
As described above, a user's fingers never touch the tip or the barrel so that the used tip and the barrel do not dirty the user's hand and the sweat on user's fingers should not contact the work assembly.
Claims (13)
1. A method of using an exchangeable work assembly of a screwdriver, comprising using a polygonal shape of one element and a polygonal hole in another element, and promoting the friction between the two elements by rotation 5 to cause the hole securely to abut the outer periphery of said one element.
2. An exchangeable work assembly for a screwdriver comprising: a tip with a first end adapted to be longitudinally connected to a shank of the screwdriver, and a second end adapted to drive a work piece; and a detaching block having a hole for receiving and engaging to the 10 second end of the tip for detaching the tip from the shank of the screwdriver after rotation.
3. The exchangeable work assembly as claimed in claim 2, wherein the hole in the detaching block is a polygonal hole for receiving the second end of the tip during detaching the tip, the cross-section of the hole corresponds to that of the 15 tip, the hole has an area greater than that of the tip and multiple sides connected to one another and each being convex relative to the detaching block, and the hole is tapered and the enlarged end of the hole faces the tip.
4. The exchangeable work assembly as claimed in claim 2, wherein the tip has an annular groove defined in an outer periphery of the tip and the detaching 20 block has a blind hole for receiving the second end of the tip, the blind hole has a diameter slight greater than a length of each of the diagonals in the tip, the detaching block includes two rods laterally extending through detaching block and partially received in the blind hole, and the distance between the two rods is slightly greater than that between two opposite sides of the tip.
25
5. The exchangeable work assembly as claimed in claim 2, wherein the tip includes multiple edges each having an indentation defined near a middle portion of the tip, the hole in the detaching block has a diameter slightly greater than a length of each of the diagonals of the tip, and multiple ratchets are formed on an inner periphery of the hole in the detaching block, each corresponding to and 30 selectively engageable with a corresponding one of the indentations.
6. The exchangeable work assembly as claimed in claim 2 comprising: a connector adapted to be partially received in the shank of the screwdriver and including a polygonal block and a polygonal stub longitudinally extending from one end of the polygonal block, the polygonal stub being adapted
to be received in the shank of the screwdriver; a first detaching block having a polygonal hole for receiving the polygonal block of the connector for detaching the connector from the shank after rotation; 5 a barrel connected to the polygonal block of the connector, the barrel having a polygonal hole for receiving the polygonal block of the connector; and a second detaching block connectable to the barrel, the barrel having a hole for receiving the barrel for detaching the barrel from the connector after rotating. 10
7. The exchangeable work assembly as claimed in claim 6, wherein the barrel has a series of notches longitudinally defined in an outer periphery of the barrel, and the second detaching block includes a series of V-shaped protrusions longitudinally extending from an inner periphery of the hole in the first detaching block, each protrusion being complementary to a corresponding one of the series 15 of notches of the first barrel.
8. The exchangeable work assembly as claimed in claim 6, wherein the barrel is cubic and includes four edges each having a cutout longitudinally defined in the outer periphery of the barrel and the hole in the detaching block has a cross section corresponding to that of the barrel.
20
9. An exchangeable work assembly of a screwdriver comprising: a connector adapted to be partially received in the shank of the screwdriver and including a polygonal block and a polygonal stub longitudinally extending from one end of the polygonal block, the polygonal stub being adapted to be received in the shank of the screwdriver; 25 a first detaching block having a polygonal hole for receiving the polygonal block of the connector for detaching the connector from the shank after rotation; a barrel connected to the polygonal block of the connector, the barrel having a polygonal hole for receiving the polygonal block of the connector; and 30 a second detaching block connectable to the barrel, the barrel having a hole for receiving the barrel for detaching the barrel from the connector after rotation.
10. The exchangeable work assembly as claimed in claim 9, wherein the barrel has a series of notches longitudinally defined in an outer periphery of the
barrel, and the second detaching block includes a series of V-shaped protrusions longitudinally extending from an inner periphery of the hole in the first detaching block, each protrusion being complementary to a corresponding one of the series of notches of the first barrel.
5
11. The exchangeable work assembly as claimed in claim 9, wherein the barrel is cubic and includes four edges each having a cutout longitudinally defined in the outer periphery of the barrel, and the hole in the detaching block has a cross section corresponding to that of the barrel.
12. An exchangeable work assembly for a screwdriver constructed and l O adapted to operate substantially as hereinbefore described with reference to Fi8gures 1 to 6, 7 to 10, 11 and 12, 13 to 15, 16 or 17 to 20 of the accompanying drawings.
13. A method of using an exchangeable work assembly of a screwdriver, substantially as hereinbefore described with reference to the 15 accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0222669A GB2393413A (en) | 2002-09-30 | 2002-09-30 | Exchangeable work assembly of a screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0222669A GB2393413A (en) | 2002-09-30 | 2002-09-30 | Exchangeable work assembly of a screwdriver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0222669D0 GB0222669D0 (en) | 2002-11-06 |
| GB2393413A true GB2393413A (en) | 2004-03-31 |
Family
ID=9945033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0222669A Withdrawn GB2393413A (en) | 2002-09-30 | 2002-09-30 | Exchangeable work assembly of a screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2393413A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232624A (en) * | 1989-06-07 | 1990-12-19 | Hung Hsi Chiang | Screw driver with interchangeable bits |
| US5678961A (en) * | 1995-05-11 | 1997-10-21 | Fleege; Dennis W. | Quick change adapter |
-
2002
- 2002-09-30 GB GB0222669A patent/GB2393413A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232624A (en) * | 1989-06-07 | 1990-12-19 | Hung Hsi Chiang | Screw driver with interchangeable bits |
| US5678961A (en) * | 1995-05-11 | 1997-10-21 | Fleege; Dennis W. | Quick change adapter |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0222669D0 (en) | 2002-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |