WO2019096442A1 - Barillet de serrure pour mécanisme de verrouillage - Google Patents

Barillet de serrure pour mécanisme de verrouillage Download PDF

Info

Publication number
WO2019096442A1
WO2019096442A1 PCT/EP2018/025278 EP2018025278W WO2019096442A1 WO 2019096442 A1 WO2019096442 A1 WO 2019096442A1 EP 2018025278 W EP2018025278 W EP 2018025278W WO 2019096442 A1 WO2019096442 A1 WO 2019096442A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
lock cylinder
engagement
clutch member
spring
Prior art date
Application number
PCT/EP2018/025278
Other languages
English (en)
Inventor
David Jennings
John Mcloughlin
Original Assignee
Uap Limited
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 Uap Limited filed Critical Uap Limited
Priority to GB2003695.0A priority Critical patent/GB2581591B/en
Publication of WO2019096442A1 publication Critical patent/WO2019096442A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0054—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed
    • E05B17/0062—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed with destructive disengagement
    • 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
    • E05B15/04—Spring arrangements in locks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
    • E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
    • E05B17/2092—Means responsive to tampering or attack providing additional locking
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/04—Casings of cylinder locks
    • E05B9/041—Double cylinder locks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/10—Coupling devices for the two halves of double cylinder locks, e.g. devices for coupling the rotor with the locking cam
    • E05B9/105—Coupling devices for the two halves of double cylinder locks, e.g. devices for coupling the rotor with the locking cam including disengagement means, e.g. opening from one side being still possible even if the key is inserted from the other side

Definitions

  • the present invention relates to a lock cylinder for a locking mechanism for doors and other similar closures.
  • Such lock cylinders are commonly called euro-lock cylinders or euro-cylinders.
  • a euro-lock cylinder is designed to operate a rotatable cam with a projecting cam lever that bears against a dead bolt or similar portion of a locking mechanism to move it to an open (retracted) or to a closed (extended) position when the cam is rotated. Rotation of the cam is usually accomplished either via a pin tumbler lock mechanism that requires a key to operate or via a thumb-turn mechanism. Locking mechanisms that comprise such a lock cylinder may incorporate a lock cylinder with two pin tumbler lock mechanisms on opposite sides of the cam so that keys are required to open a door from both sides.
  • the lock cylinder may incorporate a tumbler lock mechanism on one side of the cam and a thumb-turn mechanism on the opposite side of the cam, the former typically being used on an exterior side of a door and the latter on an interior side.
  • the cam is usually selectively connected to one or other of these mechanisms by a biased clutch arrangement that is axially slidable between two positions wherein it is engaged by one of these arrangements to rotate the cam as the key or thumb-turn is rotated but is not engaged by the other of the arrangements in order that it can rotate freely relative thereto.
  • a problem with known locking mechanisms of this type is that they can be broken into with relative ease to gain access to the dead bolt of the locking mechanism.
  • the application of force via a tool from the exterior side of the lock mechanism can break off part of the lock cylinder on one side of the cam, exposing the cam and allowing the cam to be rotated or removed to leave the locking mechanism exposed for further tampering.
  • the object of the present invention is to provide an improved lock cylinder that obstructs access to the locking mechanism and therefore any dead bolt operating arrangement forming a part of it if the lock cylinder is attacked and broken into.
  • the word“normal’ describes a standard condition of the lock cylinder as it would leave the factory and under conditions of ordinary use after fitment, in other words when it has not been tampered with or broken into.
  • the term“snapped condition” describes the condition of that part of a lock cylinder that remains in position in a locking mechanism after it has been broken into and part of it removed.
  • the word“neutral” is used to describe the lock when in a normal condition when neither an interior or exterior side of the lock is engaged by a user by insertion of a key or by pressure on a thumb-turn.
  • a lock cylinder for a locking mechanism comprising
  • a rotatably mounted cam comprising a radially projecting lever that is adapted to actuate the locking mechanism on rotation of the cam;
  • first and second cores rotatably mounted within the casing on either side of the cam respectively;
  • a clutch arrangement located between the first and second cores and comprising first and second clutch members for placing either the first or the second core into engagement with the cam by movement along a longitudinal axis of the lock cylinder against the force of a biasing means;
  • first and second spring-loaded engagement mechanisms that are acted on respectively by the first and second clutch members and that are adapted to releasably connect either the first or the second clutch member and thereby the first or the second core to the cam dependent on which of said first and second cores is engaged by a user, connection of one of the first and second engagement mechanisms to the cam releasing the other of the first and second engagement mechanisms from such connection;
  • the second clutch member is adapted to move the second engagement mechanism into a position wherein it locks into engagement with the cam if the casing is broken and the first core removed.
  • the engagement mechanism used to connect the second clutch member clutch to the cam is the same mechanism that is used to lock the second core to the cam when the casing is broken and the first core removed from the lock cylinder. This is different from the prior art, where a separate locking mechanism is required for this purpose.
  • the second clutch member remains movable along the longitudinal axis of the lock cylinder. This means that it can retract into the cam if an attempt is made to grasp it using pliers or similar.
  • the second core is usable to rotate cam and therefore the lever to open the locking mechanism.
  • the second core is usually that on an interior side of a door, the lock cylinder will still permit occupants to open the door even after an attack on the lock. This is usually now a legal requirement of such lock cylinders for reasons of safety.
  • Fig. 1 is a side view of a first embodiment of lock cylinder in accordance with the present invention when in a normal condition;
  • Fig. 2 is an end view of the lock cylinder shown in Fig. 1 ;
  • Figs. 3 and 4 are sectional views along the lines III-III and IVI-IV in Figs. 1 and 2 respectively and show the lock cylinder in a neutral condition;
  • Fig. 5 is a perspective exploded view of the lock cylinder shown in Figs. 1 to 4;
  • Fig. 6 is a view similar to Fig. 3 but showing the lock cylinder when an external core thereof is connected to the cam
  • Fig. 7 is a view similar to Fig. 3 but showing a remaining part of the lock cylinder when in a snapped condition and to a slightly enlarged scale
  • Fig. 8 is a perspective exploded view of a second embodiment of lock cylinder in accordance with the present invention.
  • Fig. 9 is a side view of the lock cylinder shown in Fig. 8 when in a normal condition
  • Fig. 10 is an end view of the lock cylinder shown in Fig. 9;
  • Figs. 11 and 12 are sectional views along the lines XI -XI and XII-XII in Figs. 9 and 10 respectively and show the lock cylinder in a neutral condition;
  • Fig. 13 is a view similar to Fig. 11 but showing the lock cylinder when an external core thereof is connected to the cam;
  • Fig. 14 is a view similar to Fig. 11 but showing a remaining part of the lock cylinder when in a snapped condition along with a scrap view A of part thereof to an enlarged scale;
  • Fig. 15 is a view to an enlarged scale of a locking spring forming part of the second embodiment of lock cylinder and showing four positions thereof superimposed on one another.
  • Both the first and the second embodiments of lock cylinder described by way of example herein comprise a casing 1 with first and second cylindrical portions 2 and 3 between which is a gap in which a cam 4 is located centrally of the casing 1.
  • the cam 4 comprises a hollow cylindrical portion and a radially projecting lever 5 that is adapted to actuate a locking mechanism (not shown) on rotation of the cam 4,
  • the locking mechanism will be housed in a lock case (not shown) fitted to a door and the lock cylinder adapted for location through the lock case so that the cylindrical portions 2 and 3 protrude from exterior and interior sides of the door in use.
  • the cylindrical portions 2 and 3 define a longitudinal axis along which are respectively located first and second lock cores 6, 7 on opposite sides of the cam 4.
  • the cores 6, 7 are retained in position by circlips 8 that locate in annular grooves 9 provided in the cylindrical portions 2, 3 and cores 6, 7 on either side of the cam 4.
  • the circlips 8 permit rotation of the cores 6, 7 about their longitudinal axis but prevent their lateral movement along this axis.
  • the cores 6 and 7 may comprise conventional pin tumbler lock mechanisms comprising a keyway 10 and bores 11 housing key pins (not shown) that are movable when a key is inserted into the keyway 10 to act on biased driver pins (not shown) located within corresponding bores (not shown) formed in a radially projecting part 12 of the casing 1.
  • other lock mechanisms may be employed, for example wafer lock mechanisms.
  • the radially projecting part 12 of the casing defines a cut-out portion 13 that accommodates and permits rotation of the lever 5 therethrough. Therefore, in order to strengthen the casing 1 at this position, a strengthening bar 14 is inserted into a channel in the casing 1 and screwed to the radially projecting part 12 on the interior and exterior sides of the casing 1.
  • a strengthening bar 14 is inserted into a channel in the casing 1 and screwed to the radially projecting part 12 on the interior and exterior sides of the casing 1.
  • the casing 1 is provided with one or more weakened areas in order that it breaks at a predetermined position conducive to operation of a locking mechanism, as is described below.
  • the external side of the casing 1 is provided with a weakened area in the form of a sacrificial cut 15 that is located close to the cut-out portion 13. This ensures that most or the whole of the exterior cylindrical portion 2 can be broken away so that the first core 6 and other internal components of the lock cylinder, as described below, also fall away from remaining components of the lock cylinder.
  • first and second embodiments of lock cylinder have first and second cores 6, 7 on opposite sides of the cam 4 that comprise pin tumbler lock mechanisms
  • other embodiments of lock cylinder in accordance with the invention may comprise a core 6 of a first pin tumbler lock mechanism on one side of the cam 4 and a core 7 of a thumb-turn mechanism on the other side of the cam 4.
  • the core 6 of the lock cylinder is intended to be located on an exterior side of the door or closure and the core 7 is located on an interior side.
  • the pin tumbler lock and thumb-turn mechanisms operate in a conventional way but the manner in which they interact with the cam 4 and a clutch arrangement provided to be selectively connected to one or other of these mechanisms is the subject of the present invention.
  • rotation of the cam 4 is effected by means of a clutch arrangement that is located between the first and second cores 6 and 7 and that comprises first and second clutch members 16 and 17 for placing respectively either the first or the second core 6, 7 into engagement with the cam 4 against the force of a biasing means.
  • the clutch members 16, 17 are each in the form of a substantially cylindrical bar that is movable along the longitudinal axis against the force of compression springs 18, 19 respectively that form the biasing means.
  • the clutch members 16, 17 each locate within a cylindrical cavities formed at the inner ends of their respective cores 6, 7 and the compression springs 18, 19 are respectively located between the outer ends of the clutch members 16, 17 and end, internal faces of these cavities in the 6, 7.
  • FIGs. 6 and 13 show the situation where the exterior core 6 has been engaged by insertion of a key so that the clutch member 16 has been moved inwardly and pushed the clutch member 17 along the longitudinal axis against the force of its spring 19, which is thereby compressed. It can be seen that the noses 21 of the clutch members 16, 17 now abut on the internal side of the cam 4 rather than centrally.
  • each of the clutch members 16, 17 defines a cavity 22 therethrough in which part of its engagement mechanism is located.
  • this engagement mechanism comprises a pair of engagement members for the cam 4 in the form of spring bars 23, which are connected by a tension spring 24, and a respective pair of drive members 25.
  • the spring bars 23 are similar to the spring bars used to connect a watch strap to a watch and comprise a hollow cylinder with short, spring-loaded bars extending from each end. They are arranged with their longitudinal axes parallel to the longitudinal axis of the lock cylinder and with the tension spring 24 connecting them radially through the cavity 22 on opposite sides of the clutch member 16, 17.
  • the spring bars 23 When the tension spring 24 is not extended in a neutral condition of the lock cylinder as shown in Figs. 3 and 4, the spring bars 23 locate in respective apertures 26 in the cores 6, 7 that align with adjacent apertures 27 formed in the cam 4. The spring bars 23 lie mainly within their respective apertures 26 but protrude slightly into the apertures 27.
  • the spring bars 23 of each clutch member 16, 17 are moved radially outwards by their respective drive members 25 so that they locate more fully into the apertures 27 in the cam 4 when the clutch member 16, 17 with which they are associated is engaged. When in this engaged position, as shown in Fig.
  • each spring bar 23 of the engaged side of the lock cylinder lies with its longitudinal axis aligned with the inner surface of the cam 4 and thereby connects its clutch member 16, 17 to the cam 4.
  • the engaged clutch member 16 or 17 rotates and also rotates the cam 4.
  • the pairs of spring bars 23 are moved into and out of the apertures 27 by their respective pair of drive member 25.
  • the apertures 27 are therefore oval in outline and of a size commensurate with the length of the spring bars 23. The way in which the spring bars 23 are moved will now be described.
  • Each pair of drive members 25 comprises a pair of inserts that are located within the cavity 22 of the appropriate clutch member 6, 7 and that face one another along a surface that lies along the longitudinal axis of the lock cylinder.
  • the drive members 25 are also pierced radially by a bore 28 through which the tension spring 24 connected the respective spring bars 23 passes.
  • the drive members 25 are located in the apertures 26 in their respective cores 6, 7 they are unable to move along the longitudinal axis of the lock cylinder. However, they are able to move radially. Radial movement is accomplished by virtue of each drive member 25 defining an angled face 29 that abuts a complementary angled face 30 defined by an end wall of the clutch member 16, 17 defining the hollow portion 22.
  • each clutch member 16, 17 each define an acute angle with respect to the longitudinal axis of the lock cylinder such that the end wall of the cavity 22 has an arrow-shaped surface in cross-section that points to the centre of the cam 4, the angled faces 30 of each clutch member 16, 17 defining positive and negative angles with respect to the longitudinal axis.
  • the angled faces 30 of the two clutch members 16, 17 are mirror images of one another.
  • the engagement mechanism has been designed so that a remaining clutch member 17, which is typically that on the interior side of the lock cylinder, is adapted to move the remaining engagement mechanism into a position wherein it locks into engagement with the cam 4 if the casing 1 is broken and the exterior core 6 removed.
  • the casing 1 is designed to snap along the line of the sacrificial cut 15 so that the exterior cylindrical portion 2 can be removed. This causes the clutch member 16 and its associated engagement mechanism comprising the spring bars 23, tension spring 24 and drive members 25 to fall away. This then permits the clutch member 17 on the interior side of the lock cylinder to move further into the cam 4 under the influence of the spring 19. Under normal circumstances, this movement of the clutch member 17 would be restrained by the presence of the other clutch member 16. However, once the lock cylinder has been snapped the clutch member 17 is free to move a greater distance along the longitudinal axis of the lock cylinder 1.
  • each of the apertures 27 is provided with a projecting lip 31 and once the respective spring bar 23 has been pushed fully into the aperture 27 beyond the lip, the spring-loaded bars in its ends locate behind the lip 31 preventing the spring bar 23 from being retracted back into the clutch member 17 by the tension spring 24. This restrains further movement of the clutch member 17 into the cam 4 but also locks the cam 4 to the clutch member 17 and the core 7 as the drive members 25 now enter the apertures 27 and straddle the interface between the clutch member 17 and the cam 4.
  • each engagement mechanism comprises a pair of specially shaped locking springs 32, as shown in Fig. 15.
  • Each of these springs 32 is a flexure spring that has the shape of an eroteme or question mark with a coiling portion 33 and an anchoring portion that in this example comprises a leg 34 with an angled foot 35.
  • the coiling portions 33 of each pair of springs 32 forms an engagement member for the cam 4 and are located in the cavity 22 of one or other of the clutch members 16, 17, each of which therefore accommodates two springs 32.
  • the coiling portions 33 abut the angled faces 30 of the clutch member 16, 17 and locate within the apertures 26 formed in the cores 6, 7.
  • the leg 34 and the foot 35 of the spring 32 anchor the spring 32 in position.
  • the leg 34 is located between the end of the adjacent core 6, 7 and the inner wall of the cam 4 adjacent the aperture 27.
  • the foot 35 locates behind and bears against the outer side of the adjacent circlip 8.
  • the apertures 27 in the cam 4 in the second embodiment are substantially rectangular in shape and those on the interior side of the cam 4 are each provided with a projecting flange or lip 36 on the interior side of the aperture 27, as shown in Fig. 14. The reason for this and the mode of operation of the locking springs 32 will now be described.
  • the locking springs 32 on the interior side of the lock cylinder are also capable of locking into engagement with the cam 4 if the casing 1 is broken and the exterior core 6 removed.
  • the casing 1 snaps as described above so that the exterior cylindrical portion 2 can be removed along with the clutch member 16 and its associated locking springs 32.
  • this permits the clutch member 17 on the interior side of the lock cylinder to move into the cam 4 under the influence of the spring 19 by a greater distance than under normal circumstances.
  • This increased movement enables the coiled portions 33 of the locking springs 32 in the clutch member 17 to spring further into the apertures 27 until the free ends of the coiled portions 33 locate behind the flanges 36, as shown in Fig. 14.
  • the coiled portions 33 of the locking springs 32 are designed, in use, to move between four positions, three of which are shown superimposed on one another in Fig. 15 along with the original shape of the locking spring 32 as formed.
  • a first position 37 of the coiled portion shows the locking spring 32 as formed when it is not under any external force.
  • the position 38 shows the coiled portion 33 when the clutch member 16, 17 in which it is located is disengaged from the adjacent cam 4, the other clutch member 17, 18 being engaged.
  • Position 39 shows the coiled portion 33 when the clutch member 16, 17 is in a neutral position.
  • the final position 40 shows the coiled portion 33 after lock snapping when the locking spring 32 is locked to the cam 4.
  • the position of the coiled portion 33 when the clutch member 16, 17 is engaged is between positions 39 and 40.
  • the engagement mechanism used to connect the clutch members 16, 17 to the cam 4 is the same mechanism that is used to lock the core 7 to the cam 4 after lock snapping. This means that a separate locking mechanism is not required.
  • the clutch members 16, 17 need only to define a single angled face and that the engagement mechanisms do not need to mirror one another on opposite sides of the clutch member 16, 17. Equally, in some other embodiments it may be appropriate for the clutch members 16, 17 to each define more than two angled faces and for the engagement mechanisms to be adapted accordingly. Also, the spring bars 23 and drive members 25 could be replaced by other components that act in the same way but are differently constructed. In another modification, the interior core 7 can be set up to be preferentially connected to the cam 4 in what may be called the neutral position. In such a case only one compression spring 19 is required on the interior side of the lock cylinder to return the clutch member 16, 17 back to this neutral position after engagement of the exterior core 6.
  • the exterior clutch member 16 may then bear directly against the inner end of the core 6 without the imposition of a spring therebetween.
  • the structure of the clutch members 16, 17 and of the respective engagement mechanisms may be identical to those described above.
  • the single compression springs 18, 19 may each be replaced by pairs of springs located respectively on either side of the clutch members 16, 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Lock And Its Accessories (AREA)

Abstract

La présente invention concerne un barillet de serrure, en particulier un barillet d'auto-serrure, qui est prévu pour un mécanisme de verrouillage pour portes et autres fermetures similaires. Le barillet de serrure comprend un boîtier (1) délimitant un axe longitudinal ayant une came montée de manière rotative (4) comprenant un levier faisant saillie de façon radiale (5) qui est conçu pour actionner le mécanisme de verrouillage lors de la rotation de la came (4). Des premier et second noyaux (6, 7) sont montés de manière rotative à l'intérieur du boîtier (1) de chaque côté de la came (4) respectivement. Un agencement d'embrayage est situé entre les premier et second noyaux (6, 7) et comprend des premier et second éléments d'embrayage (16, 17) pour placer le premier ou le second noyau (6, 7) en prise avec la came (4) par déplacement le long d'un axe longitudinal du barillet de serrure contre la force de moyens de sollicitation (18, 19). Des premier et second mécanismes de mise en prise chargés par ressort (23, 24, 25 ; 32, 33, 34) sont sollicités respectivement par les premier et second éléments d'embrayage (16, 17) et sont conçus pour relier de manière amovible le premier ou le second élément d'embrayage (16, 17) et, ainsi, le premier ou le second noyau (6, 7), à la came selon celui des premier et second noyaux (6, 7) qui est mis en prise par un utilisateur. La liaison de l'un des premier et second mécanismes de mise en prise (23, 24, 25 ; 32, 33, 34) à la came (4) libère l'autre des premier et second mécanismes de mise en prise (23, 24, 25 ; 32, 33, 34) de cette liaison. Le second élément d'embrayage (17) est conçu pour déplacer le second mécanisme de mise en prise (23, 24, 25 ; 32, 33, 34) dans une position dans laquelle il se verrouille en prise avec la came (4) si le boîtier (1) est cassé et le premier noyau (6) retiré.
PCT/EP2018/025278 2017-11-17 2018-11-05 Barillet de serrure pour mécanisme de verrouillage WO2019096442A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2003695.0A GB2581591B (en) 2017-11-17 2018-11-05 A lock cylinder for a locking mechanism

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1719038.0 2017-11-17
GBGB1719038.0A GB201719038D0 (en) 2017-11-17 2017-11-17 A lock cylinder for a locking mechanism

Publications (1)

Publication Number Publication Date
WO2019096442A1 true WO2019096442A1 (fr) 2019-05-23

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ID=60805801

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/025278 WO2019096442A1 (fr) 2017-11-17 2018-11-05 Barillet de serrure pour mécanisme de verrouillage

Country Status (2)

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GB (2) GB201719038D0 (fr)
WO (1) WO2019096442A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2622472A (en) * 2022-07-15 2024-03-20 Brisant Secure Ltd Cylinder lock

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011051703A2 (fr) * 2009-10-26 2011-05-05 Avocet Hardware Limited Mécanisme de serrure
CN102877696A (zh) * 2012-10-17 2013-01-16 徐钜祥 一种改进的门锁机构
GB2518496A (en) * 2013-07-17 2015-03-25 K I J Security Locks Ltd A lock
GB2531900A (en) * 2014-09-06 2016-05-04 Xu Juxiang Lock cylinder mechanism capable of preventing violent damage
GB2549193A (en) * 2016-03-11 2017-10-11 K I J Security Locks Ltd A lock

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011051703A2 (fr) * 2009-10-26 2011-05-05 Avocet Hardware Limited Mécanisme de serrure
CN102877696A (zh) * 2012-10-17 2013-01-16 徐钜祥 一种改进的门锁机构
GB2518496A (en) * 2013-07-17 2015-03-25 K I J Security Locks Ltd A lock
GB2531900A (en) * 2014-09-06 2016-05-04 Xu Juxiang Lock cylinder mechanism capable of preventing violent damage
GB2549193A (en) * 2016-03-11 2017-10-11 K I J Security Locks Ltd A lock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2622472A (en) * 2022-07-15 2024-03-20 Brisant Secure Ltd Cylinder lock

Also Published As

Publication number Publication date
GB2581591A (en) 2020-08-26
GB2581591B (en) 2022-08-31
GB202003695D0 (en) 2020-04-29
GB201719038D0 (en) 2018-01-03

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