EP2990567B1 - Cylindrical lock core and lock with cylindrical lock core - Google Patents

Cylindrical lock core and lock with cylindrical lock core Download PDF

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Publication number
EP2990567B1
EP2990567B1 EP15179832.9A EP15179832A EP2990567B1 EP 2990567 B1 EP2990567 B1 EP 2990567B1 EP 15179832 A EP15179832 A EP 15179832A EP 2990567 B1 EP2990567 B1 EP 2990567B1
Authority
EP
European Patent Office
Prior art keywords
guiding
key
cylindrical
channel
lock core
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.)
Not-in-force
Application number
EP15179832.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2990567A1 (en
Inventor
Zdenek Juda
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.)
Tokoz AS
Original Assignee
Tokoz AS
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 Tokoz AS filed Critical Tokoz AS
Publication of EP2990567A1 publication Critical patent/EP2990567A1/en
Application granted granted Critical
Publication of EP2990567B1 publication Critical patent/EP2990567B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • E05B15/08—Key guides; Key pins ; Keyholes; Keyhole finders
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E05B27/0042—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with additional key identifying function, e.g. with use of additional key operated rotor-blocking elements, not of split pin tumbler type
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
    • E05B35/001—Locks for use with special keys or a plurality of keys ; keys therefor with key identifying function

Definitions

  • the present invention relates to a cylindrical lock core for a cylinder lock, which lock core comprises a key channel for inserting a flat key having a coding edge on one side of its blade and a guiding edge on the other side of the same, at least one radial channel opening into said key channel and at least one coding tumbler slidably mounted in said radial channel.
  • the present invention also relates a cylinder lock comprising such cylindrical lock core as well an assembly comprising such cylinder lock and a key, there is at least one guiding stop removably inserted in the cut-out and having a bearing surface, which is at least partially aligned with the cylindrical surface of the cylindrical lock core, and a working area, a part of which extends into the key channel, namely into that portion of the key channel, which is intended for guiding the guiding edge of the key.
  • Locks having cylindrical lock cores which comprise tumblers for coding the respective lock, are generally known.
  • a prior art lock comprises a case in which a cylindrical lock core is mounted, the latter being provided with a key channel for inserting a corresponding key.
  • the case is further provided with guiding chambers, which are arranged inside the same and in which interlocking tumblers resting on spring elements are slidably mounted, while the cylindrical lock core is provided with radial channels accommodating coding tumblers.
  • the lengths of the individual tumblers as well as the sequence of the same enable a code to be generated. Accordingly, a right key must have its blade provided with cut-outs / projections with individual depths corresponding to such code.
  • the coding edge of the key blade After having been inserted into the key channel, the coding edge of the key blade, namely the cut-outs and projections of the same, come into contact with the respective coding tumblers, causing the latter to be pushed in a radial direction towards the respective guiding chamber. Consequently, the coding tumblers force the respective interlocking tumblers into the chamber in a manner that ensures that each contact surface between a coding tumbler and an interlocking tumbler forming an individual tumbler pair matches with the above cylindrical partition plane.
  • the interlocking tumblers are partly slid out of the chamber due to the action of the respective spring elements, so that they intersect said cylindrical partition plane, thus preventing the cylindrical core from rotating inside the case.
  • the cylindrical partition plane is intersected by the coding tumblers slid out of certain chambers as well as by the interlocking tumblers slid out of the remaining chambers.
  • the key channel can be provided with various longitudinal slots and lengthwise ribs. This means that the profile or cross-sectional shape of a right key must match with the given shape of the key channel. Thereby, a further safeguarding element of the lock is created.
  • Another known key type comprises a coding edge on either side of the key blade and a corresponding lock has two sets of slidably mounted tumblers, the coding tumblers belonging to one set abutting against the first coding edge and the coding tumblers belonging to other set abutting against the second coding edge.
  • Other known keys are provided with dimples formed on the lateral sides of the respective key blades, said dimples engaging with the coding tumblers, which are displaceable inside the lock in a radial direction, said radial direction being perpendicular to the axes of the tumblers engaging with the coding edge of the key.
  • the document UVZ23209 discloses a known cylindrical lock core which is provided with a circumferential cut-out for inserting a stop member, said stop member supporting a key inserted into the lock, namely the surface of the key which is perpendicular to the centre line of the same and which is arranged along the upper edge of the respective key blade. Thereby, the stop member defines the right insertion depth of the key.
  • the latter technical solution does not enable the upper key edge to be laterally guided. Besides that, it is not possible to achieve any noticeable increase in variability with regard to the shapes of the key.
  • EP 1 154 103 and EP 1 048 804 are known various solutions, describing various variants of a stop for defining the right key depth insertion into a lock without wider coding of the system key - a lock with a thickness of the rest of the guiding edge of the key and with longitudinal recesses - grooves in the guiding edge of the key in combination with a guiding stop with a defined recess for cooperation not only with the length but even with the depth of the longitudinal recess in the guiding edge of the key.
  • the objective of the present invention is to increase the number of the safeguarding elements or, in other words, the number of possible variations of a particular lock, without noticeably extending the labour input required for installation and without increasing the total number of the structural parts of such a lock.
  • a cylindrical lock core for a cylinder lock which lock core comprises a key channel for inserting a flat key having a coding edge on one side of and a guiding edge on the other side, at least one radial channel opening into the key channel and at least one coding tumbler slidably mounted in the radial channel.
  • the cylindrical lock core is further provided with at least one cut-out arranged on the outer circumference thereof and spaced both from the inlet end and from the outlet end of the key channel, wherein there is at least one guiding stop removably inserted in the cut-out and having a bearing surface, which is at least partially aligned with the cylindrical surface of the cylindrical lock core, and a working area, a part of which extends into the key channel, namely into that portion of the key channel, which is intended for guiding the guiding edge of the key.
  • the part of the guiding stop which extends into the key channel, is provided with at least one slot for lateral and upper guiding of the guiding edge of the key.
  • the slot - when viewed in a radial section of the cylindrical lock - is narrower than the key channel in its area for guiding the guiding edge of the key.
  • the cylindrical lock core is provided with a first cut-out accommodating a first guiding stop and with a second cut-out accommodating a second guiding stop, the shapes of the first guiding stop and the second guiding stop being different from each other in the areas where they extend into the key channel.
  • At least one guiding stop has an arc shape and is in the form of a sheet-metal stamping or cutting, the radius of the outer arc-shaped surface of the guiding stop matching with that of the surface of the cylindrical lock core and/or the inner surface of the cut-out situated outside the key channel forming a portion of a cylindrical surface having a radius matching with that of the inner arc-shaped surface of the corresponding guiding stop.
  • the radial channel accommodates a sliding tumbler, which is slidably mounted inside the same and which has a supporting end for contacting an interlocking tumbler and a working end, said working end comprising a recess accommodating a contact element with a clearance, said contact element being secured against slipping out of the recess in the direction of the longitudinal axis of the coding tumbler and having, in at least one portion, a circular cross-section for providing a rolling contact with a coding edge of a key inserted into the cylinder lock.
  • the contact element has the shape of a ball or the shape of a cylindrical or barrel-like roller.
  • the radial channel may be provided with guide recesses for guiding the coding tumbler, the guide recesses being widened in the area, where they open into the radial channel, in order to form bearing surfaces for the contact element.
  • an assembly consisting of a cylinder lock and a flat key having a coding edge and a guiding edge, wherein the assembly comprises the above described cylinder lock and a key having its guiding edge provided with at least one guiding recess, wherein the guiding recess extends in parallel to the longitudinal axis of the key and - upon insertion of the key into the key channel - accommodates that portion of the guiding stop, which extends into the key channel.
  • FIG. 1 is a partial cross-sectional view showing a cylinder lock according to the invention
  • Fig. 2 shows the lock of Fig. 1 in a vertical longitudinal section
  • Fig. 3 shows the lock of Fig. 1 in a lateral section
  • Fig. 4 shows a key for an assembly according to the invention.
  • the individual representations are strongly magnified in the drawings.
  • the lock according to the exemplary embodiment of the present invention comprises a case 1 provided with a cylindrical cavity in which a cylindrical lock core 2 is accommodated.
  • the attached drawings show a lock comprising two pairs of cases 1 and corresponding cylindrical lock cores 2 , which means that there is one cylindrical lock core 2 provided for either side of the respective door.
  • the two cylindrical lock cores 2 are interconnected through a coupling assembly 15 .
  • an operating element 16 being arranged between the said cores, said element serving for actuating a locking bar.
  • the portions of the case 1 associated with either cylindrical lock core 2 are interconnected through a bridge 17 , the latter being provided with an anchoring hole 18 for securing the lock inside a door.
  • the bridge simultaneously serves as an assembling stopper 4 for either case 1 .
  • the openings 19 for possible lateral arresting pins are also apparent.
  • the case 1 comprises an array of guiding chambers 3 which open into the cylindrical cavity, the axes of said chambers being perpendicular to the longitudinal axis of the cylindrical cavity.
  • the guiding chambers 3 are closed by the assembling stopper 4 secured by the retaining pin 5 arranged on the outside surface of the case.
  • Each guiding chamber 3 accommodates an interlocking tumbler 6 slidably mounted therein.
  • the space between the assembling stopper 4 and the interlocking tumbler 6 accommodates a compression spring 7 .
  • the cylindrical lock core 2 comprises an array of radial channels 8 , the rotation of the cylindrical lock core 2 inside the case 1 causing said radial channels to be aligned with the guiding chambers 3 . Consequently, each guiding chamber 3 assumes a coaxial arrangement with respect to a corresponding radial channel 8 .
  • the cylindrical lock core 2 also comprises an inner key channel 9 extending in the direction of the longitudinal axis of the cylindrical lock core 2 .
  • the radial channels 9 individually open into the key channel 9 .
  • each radial channel 8 contains a coding tumbler 10 , which is slidably mounted inside the same and which has a supporting end 11 provided with a contact face for maintaining contact with an interlocking tumbler 6 or with a cylindrical inner surface of the cylindrical cavity of the case 1 , on the one hand, and a working end 12 for contacting a coding edge 20 of a key 14 , on the other hand.
  • a coding tumbler 10 which is slidably mounted inside the same and which has a supporting end 11 provided with a contact face for maintaining contact with an interlocking tumbler 6 or with a cylindrical inner surface of the cylindrical cavity of the case 1 , on the one hand, and a working end 12 for contacting a coding edge 20 of a key 14 , on the other hand.
  • the cylindrical lock core 2 is also provided with a first cut-out 22 and a second cut-out 25 , said cut-outs being arranged on the opposite side with respect to the radial channels 8 .
  • the first cut-out 22 accommodates a first arc-shaped guiding stop 23 inserted therein, the outer arc-shaped surface of said guiding stop being aligned with the outer cylindrical surface of the cylindrical lock core 2 , while the inner surface of the guiding stop can at least partially protrude into the key channel 9 , said inner surface being adapted for guiding the key 14 performing its sliding movement within the key channel 9 , on the one hand, and for preventing a wrong key from being fully inserted into the lock, on the other hand.
  • the guiding stop can prevent a wrong key from being inserted into the lock in it that acts as an obstruction causing a wrong key to stop when the guiding edge 21 of the same is not provided with a corresponding guiding recess 24 .
  • the second cut-out 25 accommodates a second guiding stop 26 having a similar function in relation to the first guiding stop 23 .
  • the second guiding stop 26 can extend into the key channel 9 such that the corresponding second guiding recess 27 formed in the key 14 is situated on the opposite side of the guiding edge 21 of the key or on the same side. In the latter case, however, said second guiding recess must be deeper.
  • first cut-out 22 and the first guiding stop 23 are provided, the latter extending into the key channel 9 in a manner requiring the respective key 14 to be provided with a guiding recess 24 , 27 on either side of its guiding edge 21 in a manner requiring the respective key 14 to be provided with a guiding recess 24 on a single side of its guiding edge 21 .
  • the code is based not only on a unique combination of numbers, spacings and lengths of the individual tumblers 10 and profiles of the key channels 9 , said profiles being defined by the longitudinal slots and ribs extending along the respective key channel 9 , but also on the shape of each individual inserted guiding stop 22 , 25 , particularly in the area where said guiding stop extends into the key channel 9 , on the total number of the inserted guiding stops 22 , 25 and on the distance of the latter from the inlet end of the key channel 9 .
  • the respective guiding stop will 23 , 26 prevent it from being fully inserted into the key channel 9 . Consequently, it will not be possible to open the lock by means of such key.
  • the guiding stops 23 , 26 are not visible without dismantling the respective lock. Thus, unauthorized persons are not able to determine whether the respective key 14 should have a guiding recess 24 , 27 and what such a guiding recess should be like.
  • the guiding recesses 24 , 27 facilitate, in association with the shape of the guiding stop 23 , 26 or with the upper and at least one lateral edge of the slot formed in the guiding stop 23 , 26 , a proper insertion of the key into the lock, thus making the movement of the key in the lock smoother.
  • the arrangement of the coding tumblers 10 is modified so that the working end 12 comprises a recess, in which a ball 13 is rotatably accommodated, said ball being adapted for coming into a rolling contact with a coding edge 20 of a key 14 , i.e. with the cut-outs and projections of said edge, when the key 14 is being slid into the key channel 9 and out of the same.
  • both the coding tumblers 10 and the interlocking tumblers 6 are radially displaceable with respect to the cylindrical lock core 2 , i.e. in a direction which extends perpendicularly to the longitudinal axis of the cylindrical cavity or to that of the key channel 9 .
  • the radial channels 8 formed in the cylindrical lock core 2 comprise additional guide recesses (not shown) for guiding the tumblers 10 in a radial direction.
  • the above mentioned guide recesses are widened in the area, where they open into the key channel 9 , thus providing bearing surfaces for guiding the balls 13 during the sliding movement of the respective coding tumbler 10 inside the radial channel 8 and preventing the ball 13 from being slid out of the respective recess during the sliding movement of a key 14 inside the key channel 9 .
  • the recess for accommodating the ball 13 i.e. the recess formed at the working end 12 of the coding tumbler 10 , has a shape of a partial cylindrical surface which surrounds the ball 13 with a certain clearance so that a sector of the circumferential circle of the cross-sectional profile of the ball 13 , which sector belongs to the area where the ball 13 is in contact with the recess formed at the working end 12 of the coding tumbler 10 , has an angular extension between 190° and 330° when viewed in a cross-sectional representation related to the centre of the ball.
  • the recess for accommodating the ball 13 is formed in a manner which enables the ball 13 to freely rotate inside the recess while preventing the same from being displaced with respect to the coding tumbler 10 , specifically in the direction of the sliding movement of the tumbler in the radial channel 8 .
  • differently shaped of recesses are also usable, provided that they enable the ball 13 to rotate while preventing it from sliding out of the recess in the radial direction with respect to the cylindrical lock core 2 .
  • the shape of the recess does not have to follow exactly that of the ball 13 but must provide at least three supporting points which fulfil the above function.
  • the balls 13 can be replaced with another contact element which can create a rolling contact with a coding edge 20 of a key 14 .
  • Such contact element can assume, for example, a shape of a cylindrical or barrel-like roller etc.
  • the contact element has a circular cross-section in a plane which defines the direction of the movement of the key 14 being slid into the lock or out of the same.
  • the shape of the recess formed at the working end 12 of the coding tumbler 10 must be adapted to that of the contact element in order that the latter is enabled to perform a rotational movement around an axis, which is perpendicular to the plane encompassing the direction of the insertion of the key 14 into the key channel 9 .
  • the rotating contact element must be prevented from falling out of the recess in any radial direction with respect to the cylindrical lock core 2 .
  • a rolling contact of the contact element with the coding edge 20 of the key 14 is achieved, causing the contact element to rotate around its axis extending in the movement direction of the key 14 when the key 14 is being slid into or out of the key channel 9 .
  • the contact element extends beyond the working end 12 of the coding tumbler 10 .
  • the structural arrangement of the coding tumbler 10 according to the present exemplary embodiment of the invention namely the arrangement comprising the working end 12 provided with a contact element for providing a rolling contact with a key 14 , reduces the wear of the coding tumbler 10 itself and the key 14 during the operation of the lock, on the one hand, and makes the movement of the key 14 being slid into / out of the key channel 9 considerably smoother, on the other hand.
  • the known coding tumblers 10 constituting the prior art may also have a split arrangement which means that they comprise a first portion with a supporting end 11 and a second portion with a working end 12 .
EP15179832.9A 2014-08-05 2015-08-05 Cylindrical lock core and lock with cylindrical lock core Not-in-force EP2990567B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2014-529A CZ2014529A3 (cs) 2014-08-05 2014-08-05 Válcová vložka a zámek s válcovou vložkou

Publications (2)

Publication Number Publication Date
EP2990567A1 EP2990567A1 (en) 2016-03-02
EP2990567B1 true EP2990567B1 (en) 2018-12-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15179832.9A Not-in-force EP2990567B1 (en) 2014-08-05 2015-08-05 Cylindrical lock core and lock with cylindrical lock core

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EP (1) EP2990567B1 (cs)
CZ (1) CZ2014529A3 (cs)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835725A (en) * 1927-05-27 1931-12-08 Yale & Towne Mfg Co Cylinder lock
US4294093A (en) * 1979-06-14 1981-10-13 Best Lock Corporation Pin tumbler lock with pull-resistant key plug
US5088306A (en) * 1989-10-31 1992-02-18 Medeco Security Locks, Inc. Cylinder lock with changeable keyway
US5272895A (en) * 1991-03-29 1993-12-28 Best Lock Corporation High security key and cylinder lock assembly
EP0953699B1 (de) * 1998-04-04 2001-08-08 Schlosssicherungen Gera GmbH Schliesszylinder mit zugeordnetem Flachschlüssel im variablen Stufenprofil
DE19919568A1 (de) * 1999-04-29 2000-11-02 Bremicker Soehne Kg A Schließsystem
AT4292U1 (de) * 2000-05-09 2001-05-25 Kaba Gege Gmbh Flachschlüssel
GB2361505B (en) * 2001-08-06 2002-03-06 Yale Security Prod Uk Ltd Improved key and lock
CZ23209U1 (cs) * 2011-10-19 2012-01-09 Assa Abloy Rychnov, S. R. O. Zámek a klíc
CZ26951U1 (cs) * 2014-04-02 2014-05-19 Assa Abloy Czech & Slovakia S.R.O. Zámek a klíč k ovládání tohoto zámku

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CZ305479B6 (cs) 2015-10-21
EP2990567A1 (en) 2016-03-02
CZ2014529A3 (cs) 2015-10-21

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