EP0068205A2 - Tournevis avec lame interchangeable - Google Patents

Tournevis avec lame interchangeable Download PDF

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Publication number
EP0068205A2
EP0068205A2 EP82105051A EP82105051A EP0068205A2 EP 0068205 A2 EP0068205 A2 EP 0068205A2 EP 82105051 A EP82105051 A EP 82105051A EP 82105051 A EP82105051 A EP 82105051A EP 0068205 A2 EP0068205 A2 EP 0068205A2
Authority
EP
European Patent Office
Prior art keywords
blade
bush
booklet
handle
annular groove
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Withdrawn
Application number
EP82105051A
Other languages
German (de)
English (en)
Other versions
EP0068205A3 (fr
Inventor
Karl Lieser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Publication of EP0068205A2 publication Critical patent/EP0068205A2/fr
Publication of EP0068205A3 publication Critical patent/EP0068205A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/04—Socket, tang, or like fixings with detachable or separate socket pieces
    • 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
    • B25B15/00—Screwdrivers
    • B25B15/02—Screwdrivers operated by rotating the handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F1/00—Combination or multi-purpose hand tools
    • B25F1/02—Combination or multi-purpose hand tools with interchangeable or adjustable tool elements

Definitions

  • the invention relates to a screwdriver with an interchangeable blade, which can be inserted from the one end in a form-fitting manner into a longitudinally non-circular opening in a cross-section which is non-circular in cross-section and which is assigned a spring for frictionally holding the blade, the opening being viewed from the inside and outside is formed polygonal sleeve, which is formed with part of its length in the booklet and with its remaining length protrudes over the end face of the booklet and which is assigned an annular groove in which the annularly shaped spring partially lies.
  • the object of the invention is based on the development of a screwdriver of this type in such a way that the production costs can be reduced while achieving an increase in stability.
  • the spring lies in an annular groove in front of the inner end face of the sleeve between the end face of the sleeve and a shoulder of the stepped entry bore of the handle and the working end of the blade is tapered relative to the diameter of the shaft.
  • the screwdriver designed in this way is characterized on the one hand by lower production costs.
  • the ring groove receiving the spring is now in the booklet itself. If this is made of plastic, the ring groove can already be taken into account when spraying. With larger quantities, this means a not insignificant saving in manufacturing costs.
  • the arrangement of the annular groove in the booklet has the advantage that the transmission element between the shaft and booklet, namely the bushing, is not weakened, so that this results in an increase in the stability of the screwdriver. Pushing the shaft equipped with blades on both sides into the handle is still permitted since the working end of the blades is tapered in relation to the diameter of the shaft. This enables trouble-free, complete insertion of the shaft into the entry hole.
  • the spring consists of a leaf spring ring with a circumferential separation point. This design proves to be very unaffected by wear, so that even after a long period of use, the secure frictional engagement is always guaranteed.
  • the leaf spring ring comes into contact with the shaft when it is inserted.
  • the screwdriver has a booklet 1.
  • the latter is preferably made of suitable plastic, so that the booklet can be produced using the plastic injection molding process.
  • a bush 2 with a cross section having a part x its length is formed in the booklet 1. The remaining length y of the sleeve 2 projects beyond the end face 3 of the booklet 1.
  • the bushing 2 contains an opening 4 with a hexagonal cross section, which is oriented such that the outer hexagonal surfaces 5 of the bushing 2 are parallel to the inner hexagonal surfaces 6 of the opening 4, see FIG. 3. From FIG. 2 it can be seen that the polygonal shape of the sleeve 2 extends only over approximately the partial length y corresponding to the projection of the sleeve 2 over the end face 3 of the booklet 1. The remaining length of the opening 4 corresponds to the length x and is designed as a cylindrical bore 7 which is larger in cross section than the inner polygon.
  • the cylindrical bore 7 of the sleeve 2 is followed by an annular groove 15 which is larger than the bore 7.
  • the latter is part of a step-shaped stepped entry bore 16 of the booklet 1, the entry bore in the end region 16 'having a hexagonal cross section such that this cross section corresponds approximately to the cross section of the hexagonal opening 4 of the sleeve 2.
  • a shoulder 17 is created through the annular groove 15 of the inlet bore 16.
  • there are two leaf spring rings 18 and 19 which are arranged one behind the other and form the spring.
  • One leaf spring ring 18 is supported with its edge R on the shoulder 17, while the other leaf spring ring 19 rests with its edge R on the end face 20 of the sleeve 2.
  • Each leaf spring ring 18, 19 has a circumferential separation point 21. As particularly illustrated in FIGS. 2 and 5, the mutually opposite edges of the separation point 21 engage in a tooth-like manner.
  • the blade 10 has a blade shaft 12 with a hexagonal cross section, which is adapted to the cross section of the hexagonal opening 4.
  • the blade shaft 12 continues at one working end in a Phillips blade 13 and at the other working end in a slotted blade 14.
  • These working ends 13, 14 of the blade 10 are designed such that they are tapered in relation to the diameter of the shaft 12. Therefore, the blade with the respective working end 13 or 14 can be inserted without problems into the bushing 2 while moving through the leaf spring rings 18, 19 into the inlet bore 16.
  • the leaf spring rings 18, 19 then expand, as illustrated in FIGS. 5 and 6, with good frictional engagement. Even when the leaf spring rings 18, 19 are widened, the toothing is not canceled, so that after the blade 10 is pulled out of the booklet 1, the leaf spring rings 18, 19 always return to their starting position.
  • Both the opening area accommodating the bush 2 and the adjoining inlet bore 16 with an annular groove 15 can be taken into account when the booklet 1 is pointed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
EP82105051A 1981-06-19 1982-06-09 Tournevis avec lame interchangeable Withdrawn EP0068205A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3124026 1981-06-19
DE19813124026 DE3124026A1 (de) 1981-06-19 1981-06-19 Schraubendreher mit auswechselbarer klinge

Publications (2)

Publication Number Publication Date
EP0068205A2 true EP0068205A2 (fr) 1983-01-05
EP0068205A3 EP0068205A3 (fr) 1984-05-16

Family

ID=6134879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105051A Withdrawn EP0068205A3 (fr) 1981-06-19 1982-06-09 Tournevis avec lame interchangeable

Country Status (3)

Country Link
EP (1) EP0068205A3 (fr)
JP (1) JPS5851081A (fr)
DE (1) DE3124026A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030167A1 (fr) * 1995-03-31 1996-10-03 Strauch, Martin Tournevis a tige gainee

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3539502C1 (de) * 1985-11-07 1987-02-05 Leibinger Oswald Gmbh Schraubendreher,insbesondere fuer chirurgische Zwecke
USD310011S (en) 1987-03-06 1990-08-21 Felo-Werkzeugfabrik - Holland-Letz GmbH Screwdriver

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1961246A (en) * 1932-04-29 1934-06-05 Timothy B Powers Screw driver
FR881205A (fr) * 1942-04-14 1943-04-19 Les Fils De Peugeot Freres Tournevis à lame reversible
US2596594A (en) * 1950-10-11 1952-05-13 Park Metalware Company Inc Chuck feature of tools of the detachably connected shank and handle type
US4096896A (en) * 1977-04-29 1978-06-27 Upson Tools, Inc. Composite tool structure
DE3016932C2 (de) * 1980-05-02 1985-11-28 Hermann Werner Gmbh & Co, 5600 Wuppertal Schraubendreher mit auswechselbarer, in ihrem Schaftquerschnitt mehrkantiger Klinge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030167A1 (fr) * 1995-03-31 1996-10-03 Strauch, Martin Tournevis a tige gainee

Also Published As

Publication number Publication date
JPS5851081A (ja) 1983-03-25
EP0068205A3 (fr) 1984-05-16
DE3124026A1 (de) 1982-12-30

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19830620

PUAL Search report despatched

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STAA Information on the status of an ep patent application or granted ep patent

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

18W Application withdrawn

Withdrawal date: 19840331

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LIESER, KARL