EP2497882A2 - Cylindre de serrure et sa clé - Google Patents

Cylindre de serrure et sa clé Download PDF

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Publication number
EP2497882A2
EP2497882A2 EP12001413A EP12001413A EP2497882A2 EP 2497882 A2 EP2497882 A2 EP 2497882A2 EP 12001413 A EP12001413 A EP 12001413A EP 12001413 A EP12001413 A EP 12001413A EP 2497882 A2 EP2497882 A2 EP 2497882A2
Authority
EP
European Patent Office
Prior art keywords
key
plug
lock
recesses
casing
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.)
Granted
Application number
EP12001413A
Other languages
German (de)
English (en)
Other versions
EP2497882A3 (fr
EP2497882B1 (fr
Inventor
Don Talbot
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.)
Banham Patent Locks Ltd
Original Assignee
Banham Patent Locks Ltd
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 Banham Patent Locks Ltd filed Critical Banham Patent Locks Ltd
Publication of EP2497882A2 publication Critical patent/EP2497882A2/fr
Publication of EP2497882A3 publication Critical patent/EP2497882A3/fr
Application granted granted Critical
Publication of EP2497882B1 publication Critical patent/EP2497882B1/fr
Active 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
    • 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
    • E05B19/00—Keys; Accessories therefor
    • E05B19/0017—Key profiles
    • E05B19/0035—Key profiles characterized by longitudinal bit variations
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B19/00—Keys; Accessories therefor
    • E05B19/0017—Key profiles
    • E05B19/0041—Key profiles characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key
    • E05B19/0052—Rectangular flat keys
    • E05B19/0058—Rectangular flat keys with key bits on at least one wide side surface of the key
    • E05B19/0064—Rectangular flat keys with key bits on at least one wide side surface of the key and with additional key bits on at least one narrow side edge of the key
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B19/00—Keys; Accessories therefor
    • E05B19/0017—Key profiles
    • E05B19/0041—Key profiles characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key
    • E05B19/0052—Rectangular flat keys
    • E05B19/0058—Rectangular flat keys with key bits on at least one wide side surface of the key
    • 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
    • E05B27/0003—Details
    • E05B27/0007—Rotors

Definitions

  • the present invention relates to a lock cylinder and a key therefor. More particularly, the present invention relates to improvements in lock security and the number of different combinations of keys and locks available through design.
  • a conventional key-operated pin-tumbler lock mechanism is commonly used in cylinder locks.
  • This type of lock mechanism comprises a casing with a cylindrical hole which houses a plug.
  • the plug has an axial slot for receiving a key, known as the keyway, and a series of transverse holes which are aligned with a series of corresponding holes in the lock casing.
  • the holes contain a set of key pins of differing lengths, behind which are a set of spring-loaded driver pins. Without a key in the lock, the pins are biased by the springs such that the key pins are located in the plug while the driver pins sit across the interface (the shear line) between the plug and the casing, thereby preventing rotation of the plug.
  • EP0892130 B1 describes a lock cylinder mechanism in which a series of passages extend across the diameter of the plug, intersecting the keyway.
  • Each passage contains a pair of pins which are biased towards each other by compression springs.
  • the pins may be of the same length or one of the pins may be longer than the other pin. Where one pin is longer than the other, the shorter pin is associated with a stronger spring, such that when the lock is in its rest position, the longer pin projects across the shear line.
  • the shorter (or one of the same length) pins are moved slightly outwardly, allowing the longer (or other of the same length) pins to move inwardly into a set of recesses provided in the key so that they are within the confines of the plug and no longer project across the shear line, allowing the plug to rotate.
  • the key may have two rows of recesses for engagement with a single set of pins.
  • the shank of the key has a C 2 -axis of rotational symmetry so that the key can operate the lock in either orientation of the shank in the keyway.
  • the mechanism described in this patent is more resistant to picking, since the usual method of applying a torque to the plug to locate the shear line would prevent the locking pins moving to the unlocked position, thereby preventing this method of manipulation.
  • a key-operable lock comprising:
  • Embodiments of the present invention therefore provide a lock with an increased level of security since the lock can only be unlocked by a key which is not only configured to move the locking pins into the required position but is also configured to by-pass the additional static blocking element. Spacing the blocking means from the transverse passages ensures that the key can be made as robust as possible, as will be described in more detail below.
  • the present invention it is possible to increase the number of unique lock combinations by simply changing the position of the blocking element along the length of the plug.
  • the number of unique locks any one manufacturer can produce can be multiplied by the number of different positions at which the blocking element can be provided.
  • the blocking element may be positioned before a first set of locking pins (closest to the opening of the keyway), after a sixth set of locking pins (closest to the end of the keyway) or between any of the pairs of pins therebetween.
  • seven different positions are available for the blocking element and so the number of unique lock combinations can be multiplied by seven, thereby increasing the perceived security of the locks provided.
  • the blocking means is provided between two adjacent pairs of locking pins rather than before or after the first or last pair of pins.
  • the blocking element is statically fixed in position with respect to the casing.
  • the blocking element may be integral with the casing or may be fixedly mounted in the casing.
  • the blocking element may comprise an annular or part-annular disc.
  • the disc may be orientated substantially transversely with respect to the plug and may have an inner circumference which is closer to the centre of the plug than the outer circumference of the plug.
  • the disc may comprise a cut-out which is aligned with the keyway to allow the key into the lock, when the lock is in a locked position.
  • two blocking elements may be employed.
  • a first of the two blocking elements may be provided in the upper half of the lock and a second of the two blocking elements may be provided in the lower half of the lock.
  • the first and second blocking elements may be axially spaced along the length of the plug.
  • the blocking element may also serve to retain the plug in the casing.
  • the plug may comprise a substantially cylindrical body having an annular recess, slot or groove into which the blocking element is received, thereby allowing the plug to rotate relative to the casing and blocking element.
  • a key for use with a key-operable lock such as that described above, said key comprising:
  • Embodiments of the second aspect of the present invention therefore provide a key having an increased level of security since the key is not only configured to move the locking pins into the required position but is also configured to by-pass an additional static blocking element provided in the lock. Axially spacing the transverse cut-outs from the pairs of recesses ensures that the key can be made as robust as possible since it allows a maximum amount of material to be maintained at all positions across the key shaft. If the transverse cut-outs were aligned with the pairs of recesses very little material would remain across this portion of the shaft thereby introducing a weak point which would be susceptible to breaking, particularly when subjected to torque forces during insertion into a lock.
  • transverse direction will be substantially horizontal when the key is orientated in a vertical plane such as commonly required for insertion into a keyway.
  • the transverse cut-outs may be positioned before a first set of recesses (closest to the key handle), after a sixth set of recesses (closest to the key tip) or between any of the pairs of recesses therebetween.
  • seven different positions are available for the transverse cut-outs and so the number of unique key combinations can be multiplied by seven, thereby increasing the perceived security of the keys provided.
  • the transverse cut-outs be provided between two adjacent pairs of recesses rather than before or after the first or last pair of recesses.
  • two sets of transverse cut-outs may be employed.
  • a first set of transverse cut-outs may be axially spaced along the length of the shaft from a second set of transverse cut-outs.
  • the (or each) transverse cut-out may be bounded by one or more straight or curved surfaces.
  • first and second rows of recesses are provided on each major surface such that the key can operate the lock irrespective of the orientation of the shank in the keyway.
  • the position of the pairs of recesses may be adjusted by one half of the pitch spacing of the recesses so as to accommodate the transverse cut-outs therebetween.
  • an adjacent pair of recesses may be spaced by one full pitch (or some other amount) so as to accommodate the transverse cut-outs therebetween.
  • an aim of the present invention is to allow the manufacture of a larger number of different lock and key combinations by better utilising the space available in a lock/key (i.e. without significantly altering the length of the lock/key).
  • an advantage of certain embodiments of the invention is that a large number of different lock and key combinations can be devised by separating only two adjacent pairs of recesses (rather than all pairs of recesses) so as to accommodate the transverse cut-outs, without requiring the dimensions of the lock or key to be significantly altered as a result.
  • a locking assembly comprising a key-operable lock according to the first aspect of the invention and a complementary key according to the second aspect of the invention.
  • the lock 2 comprises a rotatable cylindrical plug (i.e. rotor) 4 which is housed in a non-rotatable casing (i.e. stator) 6 of annular cross section and a cam 8.
  • a keyway 10 Extending axially into the plug 4 is a keyway 10 which is eccentrically located along a diameter of the plug 4.
  • the cam 8 is driveably coupled with the plug 4.
  • a row of six transverse passages 12 pass through the plug 4 and casing 6 intersecting the keyway 10.
  • each passage 12 through the casing 6 is narrower than a region 12b of the passage 12 through the plug 4.
  • an annular seat 14 is provided at each interface of the passage 12 with the keyway 10 .
  • a pair of locking pins 16, 16' In each passage 12 is located a pair of locking pins 16, 16', each having a tapered region 16a, an annular rim 16b, a stepped region 16c and a cylindrical end region 16d. In a rest position (shown in Figure 2 ), the pins 16, 16' abut each other at ends 16e adjacent the tapered regions 16a.
  • the pins 16, 16' are resiliently biased towards each other by a compression spring 18, 18' associated with each pin 16, 16'.
  • Each pin 18, 18' is held in place by the annular rim 16b of its associated pin 16, 16' at one end, and an annular collar 20 at a second end, said collar 20 abutting the casing 6 at an interface 22 between the plug 4 and the casing 6.
  • one compression spring 18' is more strongly biased. In the case where the pins 16, 16' are of different lengths, the shorter pin 16' is provided with the more strongly biased spring 18' (as shown in Figure 2 ).
  • the distance from the end 16e of the pin 16, 16' to the rim 16b is such that in the rest position shown the longer pin 16 projects across the interface 22 between the plug 4 and the casing 6. If the pins 16, 16' are equal in length, either may be provided with the more resilient spring 18'.
  • the lock 2 further comprises a blocking element 30 provided approximately two-thirds of the way along the length of the casing 6 from the opening of the keyway 10.
  • the blocking element 30 is constituted by a part-annular metal disc which is provided in a lower half of the casing 6 (on the side of the plug 4 which is open to the keyway 10) and extends into the plug 4.
  • the blocking element 30 is substantially arc-shaped and has a cut-out which is aligned with the keyway 10 to allow a key 40 into the lock 2, when the lock 2 is in a locked position.
  • the plug 4 has an annular recess 32 into which the blocking element 30 is received, thereby allowing the plug 4 to rotate relative to the casing 6 and blocking element 30 when the correct key 40 is inserted into the keyway 10.
  • a retaining clip 34 is provided in an upper half of the casing 6, close to the opening of the keyway 10.
  • the retaining clip 34 is similar to the blocking element 30 and is in the form of a part-annular metal disc which extends into the plug 4 and has a cut-out aligned with the keyway 10.
  • the blocking element 30 and the retaining clip 34 may each serve to block a non-complementary key from operating the lock 2 as well as retaining the plug 4 within the casing 6. Certain embodiments may therefore only require one of the blocking element 30 or the retaining clip 34 to be provided to perform both functions.
  • the key 40 comprises an integrally formed handle 42 and shaft 44.
  • the shaft 44 is tapered at a free end 46.
  • the shaft 44 On a first major surface 48, the shaft 44 has first 50a and second 50b rows of tapered recesses 52a, 52b along its length, said rows 50a, 50b being positioned either side of a centre line.
  • the recesses 52a, 52b interconnect with tapered recesses provided on an opposite major surface of the shaft 44 (not shown).
  • the depth of the interconnecting recess on the opposite second side is the same as the depth of the recess 52a in the same position of the second row 50b of the first major surface 48.
  • the shaft 44 has a C 2 -axis of rotational symmetry along its length.
  • each row 50a, 50b comprises six pairs of interconnected recesses 52a, 52b and the last two sets of recesses 52a, 52b have been shifted half a pitch towards the free end 46, when compared to the remaining recesses 52a, 52b.
  • a gap X is provided in each row of recesses.
  • a first transverse cut-out 54a is provided in a top (first minor) surface of the shaft 44 in the region of the gap X and a second transverse cut-out 54b is provided in an opposite bottom (minor) surface of the shaft 44.
  • the first and second transverse cut-outs 54a, 54b are oppositely aligned and as they are provided in the gap X they are axially spaced with respect to the pairs of recesses 52a, 52b.
  • the shaft 44 still has adequate material across its width both in the region of the transverse cut-outs 54a, 54b (as shown in Figure 4 ) and in the region of the recesses 52a, 52b (as shown in Figure 5 ).
  • the shaft 44 will be weakened and will be susceptible to braking during use.
  • the locking pins 16, 16' will be spaced to align with the recesses 52a, 52b taking into account the gap X provided in the key 40.
  • the blocking element 30 is provided adjacent the gap X.
  • transverse cut-outs 54a, 54b will align with the blocking element 30 so as to allow the shaft 44 to by-pass the blocking element 30 on rotation of the key 40 in the lock 2.
  • Figure 7 illustrates seven possible series of positions (labelled A, B, C, D, E, F, G) for each row of recesses 52a in a key such as that shown in Figure 3 , where the spacing between the recesses 52a is adjusted to provide a gap X to accommodate transverse cut-outs in accordance with the present invention.
  • series A shows the recesses 52a evenly spaced along the shaft, with the gap X being provided after the recess 52a closest to the free end 46 of the shaft 44.
  • Series B shows the situation where the last recess 52a (closest to the free end 46) has been moved half a pitch towards the free end 46 to create the gap X between the 6th and fifth recesses 52a.
  • Series C shows the situation where the last two recesses 52a have been moved half a pitch towards the free end 46 to create the gap X between the fifth and fourth recesses 52a.
  • Series D shows the situation where the last three recesses 52a have been moved half a pitch towards the free end 46 to create the gap X between the fourth and third recesses 52a.
  • Series E shows the situation where the last four recesses 52a have been moved half a pitch towards the free end 46 to create the gap X between the third and second recesses 52a.
  • Series F shows the situation where the last five recesses 52a have been moved half a pitch towards the free end 46 to create the gap X between the second and first recesses 52a.
  • Series G shows the situation where all six recesses 52a have been moved half a pitch towards the free end 46 to create the gap X between the first recess 52a and the handle 40.
  • the seven series described above therefore provide seven different combinations of pin positions.
  • If we also use the gap X to include a blocking element at five of these positions (excluding series A and G which are not mechanically practical) we can further increase the number of combinations by a factor of 5, leading to a total of 546,875 different combinations. Accordingly, embodiments of the invention can greatly increase the number of unique lock and key configurations available as well as increasing the security of the device.
  • the blocking element 30 may be provided in the upper half of the casing 6 (e.g. spaced a distance behind the retaining clip 34).
  • a key having suitable recesses to accommodate the locking pins but no transverse cut-outs will be allowed to rotate in the lock 2 until the shaft of the key abuts the blocking element 30. This will occur after approximately 90° of rotation, which may not be sufficient to move the cam 8 into an unlocked position.
  • the blocking element 30 prevents the required rotation of the cam 8, it is not necessary for the blocking element 30 to completely prevent rotation of the plug 4, as per the embodiment described above.
  • Figures 8A and 8B show a further embodiment of the present invention, in which two blocking elements 30 are provided in the casing 6, one of which is provided in the upper half of the casing 6 and the other of which is provided in the lower half of the casing 6.
  • Figure 8A also shows the exterior annular recess 32 of the plug 4, which is provided to receive the blocking elements 30 so as to allow the plug 4 to rotate relative to the casing 6 and blocking elements 30, when a key having appropriate transverse cut-outs is inserted into the keyway 10.
  • This embodiment may permit the key to be removed and/or inserted after the plug 4 and keyway 10 have been rotated by 180°.
  • the provision of two blocking elements 30 therefore blocks incorrect keys from turning the lock regardless of which position the plug 4 is in when the key is inserted.

Landscapes

  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Lock And Its Accessories (AREA)
EP12001413.9A 2011-03-07 2012-03-01 Cylindre de serrure et sa clé Active EP2497882B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201103821A GB2488783B (en) 2011-03-07 2011-03-07 Lock cylinder & key therefor

Publications (3)

Publication Number Publication Date
EP2497882A2 true EP2497882A2 (fr) 2012-09-12
EP2497882A3 EP2497882A3 (fr) 2014-04-23
EP2497882B1 EP2497882B1 (fr) 2015-12-09

Family

ID=43923297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12001413.9A Active EP2497882B1 (fr) 2011-03-07 2012-03-01 Cylindre de serrure et sa clé

Country Status (2)

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EP (1) EP2497882B1 (fr)
GB (1) GB2488783B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108952357A (zh) * 2018-06-29 2018-12-07 北京创美时代办公家具有限公司 一种门锁管理系统及其操作方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892130B1 (fr) 1997-07-18 2003-09-10 Banham Patent Locks Limited Barillet de serrure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE664635A (fr) * 1965-05-28 1900-01-01
DE1812052B2 (de) * 1968-11-30 1976-03-04 Josef Voss KG, 5040 Brühl Zylinderschloss mit flachschluessel
CA957174A (en) * 1970-04-20 1974-11-05 Paul Krakstrom Lock system
ATA150086A (de) * 1986-06-03 1987-04-15 Klausser Konrad Drehzylinderschlossschluessel
US7930916B2 (en) * 2006-03-15 2011-04-26 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Locking device and key
SI1867810T2 (sl) * 2006-06-14 2014-01-31 Cisa S.P.A. Cilinder ključavnice in pripadajoč ključ
EP1870544A1 (fr) * 2006-06-20 2007-12-26 CISA S.p.A. Serrure avec clé associée
DE102007063582A1 (de) * 2007-07-20 2009-05-28 Schäfer, Günter Willy Schließeinrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892130B1 (fr) 1997-07-18 2003-09-10 Banham Patent Locks Limited Barillet de serrure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108952357A (zh) * 2018-06-29 2018-12-07 北京创美时代办公家具有限公司 一种门锁管理系统及其操作方法
CN108952357B (zh) * 2018-06-29 2020-06-30 北京创美时代办公家具有限公司 一种门锁管理系统及其操作方法

Also Published As

Publication number Publication date
GB2488783A (en) 2012-09-12
GB2488783B (en) 2013-05-01
EP2497882A3 (fr) 2014-04-23
GB201103821D0 (en) 2011-04-20
EP2497882B1 (fr) 2015-12-09

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