EP0305588B1 - Verstärkter Plastikschlüsselschaft - Google Patents

Verstärkter Plastikschlüsselschaft Download PDF

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Publication number
EP0305588B1
EP0305588B1 EP87115992A EP87115992A EP0305588B1 EP 0305588 B1 EP0305588 B1 EP 0305588B1 EP 87115992 A EP87115992 A EP 87115992A EP 87115992 A EP87115992 A EP 87115992A EP 0305588 B1 EP0305588 B1 EP 0305588B1
Authority
EP
European Patent Office
Prior art keywords
key
shank
thickening
handle
bit
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.)
Expired - Lifetime
Application number
EP87115992A
Other languages
English (en)
French (fr)
Other versions
EP0305588A2 (de
EP0305588A3 (en
Inventor
Robert Almblad
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.)
Axxess Entry Technologies Inc
Original Assignee
Mitsubishi Corp
Axxess Entry Technologies Inc
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 Mitsubishi Corp, Axxess Entry Technologies Inc filed Critical Mitsubishi Corp
Priority to AT87115992T priority Critical patent/ATE91167T1/de
Publication of EP0305588A2 publication Critical patent/EP0305588A2/de
Publication of EP0305588A3 publication Critical patent/EP0305588A3/en
Application granted granted Critical
Publication of EP0305588B1 publication Critical patent/EP0305588B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
    • A45C11/32—Bags or wallets for holding keys
    • A45C11/325—Spare-key holders
    • A45C11/326—Card-like holders
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B19/00—Keys; Accessories therefor
    • E05B19/26—Use of special materials for keys
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/16—Use of special materials for parts of locks
    • E05B15/1635—Use of special materials for parts of locks of plastics materials

Definitions

  • the present invention relates to a molded plastic key with a shank reinforcement of the type described in the preamble of claim 1.
  • Conventional metal keys for operating tumbler locks such as in automobiles, building doors, apparatus controls, and the like, have heretofore been generally constructed throughout the shank and bit portions, at least, and generally also the handles, of a thickness common with the bit thickness. Molded plastic keys have also heretofore been constructed of substantially uniform thickness throughout their length similarly as comparable metal keys.
  • the key bit must be fairly snuggly fitted to the key slot in the cylinder plug. Looseness of the bit in the key slot might defeat proper engagement of the lock tumblers in the key notches.
  • Tendency of the user, where there is any such resistance to turning of the key in the lock, is to apply additional torque or twisting force to the key through its handle. Metal keys will generally withstand such extraordinary twisting stress.
  • DE-U-16 69 387 shows a laminated plastic key having a lengthwise sandwiched reinforcing material which extends along the entire length of the key.
  • DE-A-20 37 071 discloses a key according to the preamble of claim 1 having a reinforcing insert extending from an intermediate location in the key head through the shank and through the entire length of the key bit.
  • An important object of the present invention is to provide a new and improved molded plastic key which is strengthened against torque induced breakage of the shank portion of the key.
  • a one-piece molded plastic key 10 having a head or handle 11, typically of substantially greater width than an integral shank 12 connecting the handle to a blade or bit 13.
  • the bit 13 is of the type which may have tumbler notches 14 cut along either or both edges, and for this purpose the cross-sectional geometry of the shank and bit may, as best seen in Fig. 2, be provided with longitudinal rabbet grooves 15 providing thinner margins along both edges.
  • the key 10 has the shank 12 and the bit 13 elongated for reception in a tumbler lock 17 (Fig. 4) having a tumbler barrel cylinder or plug 18 extending from a housing 19 defining a chamber 20 of ample size to accommodate a spring-biased flapper closure 21 which is adapted to be pushed aside by the key from the dash position to the full line position when the key is inserted through an entrance 22.
  • the entrance 22 affords ample clearance to facilitate entry of the key therethrough for reception in a key slot 23 which for practical reasons is fairly closely dimensioned relative to the key bit 13. A tolerance clearance of only about 0.01 cm (.005 inch) is desirable between the bit 18 and the slot 23.
  • An entrance 24 into the key slot 23 flairs towards its outer end in a generally lead-in cam fashion to facilitate reception of the key bit 13 into the slot 23. From this it will be apparent that should there by extraordinary torque applied through the handle 11 after the key bit 13 has been introduced into the slot 23, there is no torque support for the shank 12, although the bit 13 fits closely in the slot 23.
  • the shank is reinforced.
  • reinforcement for the shank 12 may be advantageously provided by an integrally molded thickening 25 of the shank.
  • Such thickening 25 is preferable effective throughout the length of the shank from adjacent to but clear of the proximal area of the bit 13 to be notched.
  • the thickening avoids interference with close reception of the bit 13 in the key slot 23.
  • the thickening 25 is effected about .020 inch on both faces of the shank 12 and extends to at least a limited distance onto the adjacent portion of the handle 11.
  • the thickening 25 extends over substantially the entire width of both the shank 12 and the portion of the handle 11 provided with the thickening.
  • the thickening 25 may end abruptly, as shown at 26 (Fig. 3) as close as practicable to the area of the bit to be notched, so as to gain maximum advantage the thickening for its reinforcing function.
  • the handle end of the thickening 25 it may taper for smoothness both at the sides and at the handle end, substantially as visualized in Figs. 2 and 3.
  • the thickening 25 could cover the entire handle 11 on both faces of the handle, that is not necessary and plastic material is saved by having the thickening extend only partway onto the remainder of the handle. In any event, the thickening provides ample digital grip area for transmission of torque to the reinforced shank.
  • a modified shorter molded plastic key 27 having a handle 28, a short shank 29 and a bit 30 of a suitable length for the intended purpose.
  • the bit 30 has a rabbet groove 31 along only one side providing a thin longitudinal side area for receiving tumbler pin notches 32.
  • the key 27 is especially adaptable for operating a tumbler lock 33 of the kind having an escutcheon 34 providing an entrance with lead-in surfaces 35 and 37 of wider dimensions than a key slot 38 within the plug of the lock and into which the bit 30 fits fairly snuggly.
  • the key may be utilized independently, it may also provide the key for a plastic card/key combination as depicted in Figs. 9-12.
  • the key 40 is located within a complementary recess 53 within a preferably generally wallet size holder 54.
  • the recess 53 is located as conveniently near one side of the card 54 so that the remaining area of the face, or both faces, of the card can be utilized for any desired legends or indicia as schematically shown at 55.
  • integral multidirectional hinge means 55 comprising a unitary part of the molding and formed from the same material as the key and the molded card, and integrally connecting an edge of the key head or handle 41 to an edge of the card 54 in the recess 53.
  • the hinge means 55 comprises a generally elongated element which permits the key to be not only swung out of the plane of the card 54 but also to be twisted relative to the card on and about the hinge without breaking away from the card.
  • the hinge 55 comprises a generally rod shaped element which may be of cylindrical cross section and is longer than its diameter. Although the hinge 55 may be of slightly smaller diameter than the thickness of the head 41, as best seen in Fig.
  • the hinge diameter may be slightly greater than the thickness of the card 54.
  • a reinforcement extension 57 extends from the attached end of the hinges 55 onto the adjacent portion of the card 54 and is connected to a reinforcing rib 58 which runs along the edge of the card and stiffens the card in this area against undue flexibility.
  • Molded plastic keys of the kind described may be formed from an acetal resin, comprising a polymerized formaldehyde formulation, such as may be obtained from E.I. Dupont De Nemours & Company under the registered trademark "Delrin 500".
  • suitable material comprises sheet steel stampings such as cold rolled steel which may be hardened if desired, or a C1095 spring steel annealed and hardened to 55-57 Rockwell prior to molding in place in the plastic keys.
  • the present invention provides substantial reinforcement protection against torque damage to the critical shank areas of the molded plastic keys.

Landscapes

  • Springs (AREA)
  • Lock And Its Accessories (AREA)
  • Push-Button Switches (AREA)
  • Golf Clubs (AREA)
  • Pens And Brushes (AREA)
  • Materials For Medical Uses (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)

Claims (7)

  1. Geformter Kunststoffschlüssel (10,27,40) mit einem Griff (11,28,41) einem Schaft (12,29,42) und einem Bart (13,30,43) umfassend eine Schaftverstärkung gegen einen Bruch aufgrund eines außergewöhnlichen Drehmoments, das durch besagten Griff (11,28,41) aufgebracht wird, wenn nach Einschieben des Bartes (13,30,43) in ein Schloß (17,33) ein Widerstand gegen Verdrehen auftritt, dadurch gekennzeichnet, daß besagte Schaftverstärkung eine einteilig mit besagtem Schaft (12,29,42) geformte Verdickung (25,39) ist, wobei besagte Verdickung (25,39) sich im wesentlichen über die gesamte Länge des besagten Schafts (12,28,42) erstreckt, und besagte Verdickung (25,39) sich wenigstens eine begrenzte Strecke auf dem benachbarten Abschnitt besagten Griffs (11,28,41) fortsetzt.
  2. Geformter Kunststoffschlüssel nach Anspruch 1, dadurch gekennzeichnet, daß er aus einem Acetalharz geformt ist.
  3. Geformter Kunststoffschlüssel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich besagte Verdickung (25,39) über im wesentlichen die gesamte Fläche auf beiden Seiten besagten Schafts (12,29,42) erstreckt.
  4. Geformter Kunststoffschlüssel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß besagte Verdickung (25,39) benachbart zum nächstliegenden Ende besagten Barts (13,30,43) und mit Spielraum gegenüber einem Schlüsseleinschnittbereich (14,32) besagten Barts (13,30,43) plötzlich endet.
  5. Geformter Kunststoffschlüssel nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß besagte Verdickung (25,39) in Richtung auf ein Kopfende besagten Griffs (11,28,41) dünner wird.
  6. Geformter Kunststoffschlüssel nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sich besagte Verdickung (25,39) ausreichend weit auf besagten Griff (11,28,41) erstreckt, um von einem Benutzer, der ein Drehmoment auf den Schlüssel (10,27,40) ausübt, wenn der Schlüssel (10,27,40) in einem Schloss (11,33) steckt, mit den Fingern erfaßt werden zu können.
  7. Geformter Kunststoffschlüssel nach einem der vorangehenden Ansprüche, gekennzeichnet durch einen kartenähnlichen Schlüsselhalter (54) mit einer einzigen Aussparung (53), die vertieft und einer Seite benachbart liegt und eine beträchtliche Kartenseitenfläche zwischen besagter Aussparung (53) und einer zweiten Seite des Halters freiläßt, wobei besagter Schlüssel (40) in besagter Aussparung (53) liegt und eine Anlenkung (55) besagten Schlüsselgriff (41) mit besagtem Halter (54) so verbindet, daß der Schlüssel (40) klappbar in die und aus der besagten Aussparung (53) geschwenkt werden kann.
EP87115992A 1987-09-03 1987-10-30 Verstärkter Plastikschlüsselschaft Expired - Lifetime EP0305588B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87115992T ATE91167T1 (de) 1987-09-03 1987-10-30 Verstaerkter plastikschluesselschaft.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9149287A 1987-09-03 1987-09-03
US91492 1987-09-03

Publications (3)

Publication Number Publication Date
EP0305588A2 EP0305588A2 (de) 1989-03-08
EP0305588A3 EP0305588A3 (en) 1990-06-13
EP0305588B1 true EP0305588B1 (de) 1993-06-30

Family

ID=22228064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115992A Expired - Lifetime EP0305588B1 (de) 1987-09-03 1987-10-30 Verstärkter Plastikschlüsselschaft

Country Status (4)

Country Link
EP (1) EP0305588B1 (de)
AT (1) ATE91167T1 (de)
DE (1) DE3786402T2 (de)
ZA (1) ZA886362B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396500B (de) * 1989-12-15 1993-09-27 Bauer Kaba Ag Flachschlüsselrohling, flachschlüssel sowie zugehöriger schliesszylinder

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT514508A1 (de) 2013-05-14 2015-01-15 Evva Sicherheitstechnologie Schlüssel zum Betätigen eines Schließzylinders
AT514254B1 (de) 2013-05-14 2016-06-15 Evva Sicherheitstechnologie Verfahren zur Herstellung eines Schlüssels sowie eine Vorrichtung zur Durchführung des Verfahrens
AT514509B1 (de) 2013-05-14 2015-08-15 Evva Sicherheitstechnologie Schlüssel zum Betätigen eines Schließzylinders sowie Verfahren zur Herstellung des Schlüssels
AT514536A1 (de) 2013-05-14 2015-01-15 Evva Sicherheitstechnologie Schlüssel zum Betätigen eines Schließzylinders sowie Kombination des Schlüssels mit dem Schließzylinder

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1669387U (de) * 1953-04-22 1953-12-31 Heinz Roesinger Schluessel fuer tuerschloesser od. dgl.
DE1901655U (de) * 1964-06-23 1964-10-01 Krause Kg Robert Schluessel aus kunststoff, insbesondere fuer moebelschloesser.
CH495488A (de) * 1967-08-15 1970-08-31 Dana Eugene Schlüssel sowie Verfahren zu seiner Herstellung
DE2037071A1 (de) * 1970-07-27 1972-02-03 Strohschnitter & Co, 2000 Hamburg Schlüssel
US4637236A (en) * 1984-06-12 1987-01-20 Almblad Donald F Key and retainer card combination
DE3518354A1 (de) * 1985-05-22 1986-11-27 Heinrich Winkelhard GmbH & Co KG Plastik- u. Metallwarenfabrik, 4708 Kamen Verfahren zur herstellung von schluesseln oder von schluesselrohlingen fuer schloesser
US4677835A (en) * 1986-04-10 1987-07-07 Donald Almblad Plastic card/key combination and hinge structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396500B (de) * 1989-12-15 1993-09-27 Bauer Kaba Ag Flachschlüsselrohling, flachschlüssel sowie zugehöriger schliesszylinder

Also Published As

Publication number Publication date
DE3786402T2 (de) 1993-11-04
EP0305588A2 (de) 1989-03-08
ATE91167T1 (de) 1993-07-15
EP0305588A3 (en) 1990-06-13
ZA886362B (en) 1990-12-28
DE3786402D1 (de) 1993-08-05

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