EP3527754B1 - Security device for a cylinder lock - Google Patents

Security device for a cylinder lock Download PDF

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Publication number
EP3527754B1
EP3527754B1 EP19155698.4A EP19155698A EP3527754B1 EP 3527754 B1 EP3527754 B1 EP 3527754B1 EP 19155698 A EP19155698 A EP 19155698A EP 3527754 B1 EP3527754 B1 EP 3527754B1
Authority
EP
European Patent Office
Prior art keywords
slider
recess
satellite
opening
satellites
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.)
Active
Application number
EP19155698.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3527754A1 (en
Inventor
Pier Luigi Oliana
Emanuela Dal Fabbro
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.)
Individual
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Individual
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Publication of EP3527754A1 publication Critical patent/EP3527754A1/en
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Publication of EP3527754B1 publication Critical patent/EP3527754B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/14—Closures or guards for keyholes
    • E05B17/18—Closures or guards for keyholes shaped as lids or slides
    • E05B17/186—Closures or guards for keyholes shaped as lids or slides sliding
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0038—Operating or controlling locks or other fastening devices by electric or magnetic means using permanent magnets
    • E05B47/0042—Operating or controlling locks or other fastening devices by electric or magnetic means using permanent magnets with rotary magnet tumblers

Definitions

  • the present invention is relative to an improved security device for a cylinder lock, in particular for doors or gates, having the purpose of safeguarding said cylinder lock from tampering, breaking-in or vandalizing attempts.
  • Cylinder locks that are suitable, for example, to allow the closing and opening of a door or a gate, that include a cylinder operated by means of a relative key inserted into a keyhole arranged axially with respect to the cylinder are widely known.
  • the cylinder locks of known type are generally made of brass, a material that offers scarce mechanical resistance against forced-entry attempts performed by drilling and/or breaking-in and/or wrenching.
  • a known solution is to fasten to the lock a covering element arranged so as to cover the cylinder and consisting of a plate of essentially circular shape provided, at the keyhole on the cylinder, with a round hole in which is rotatably connected a keyhole protection plate provided with a slit to allow the insertion of the key.
  • Italian Patent IT 1342717 B describes a security device for the cylinder of a lock that comprises a strip of essentially rectangular shape having at one end a through opening into which is inserted the section of the cylinder that protrudes from the lock.
  • each cam On the lateral surface of each cam is radially formed an undercut adapted to be engaged with a respective locking pin slidingly contained within a through hole formed transversely to the strip and communicating with the seat of the respective cam. Each pin is thrust toward the outside of the respective through hole by a spring inserted into the hole.
  • a covering element capable of selectively occluding the cylinder of the lock.
  • the release of the covering element is achieved by placing on the same element a relative magnetic key containing magnets that can couple with the magnets contained in the cams to cause the rotation of the cams to the point where the circumferential undercuts are brought into a position of axial alignment with the pins.
  • the lowering of the covering element causes the pins to come out of the lateral slots and to enter into the cam undercuts, so as to allow the downward sliding of the covering element and make the cylinder accessible for inserting the key to open the door.
  • the size of the device and in particular its considerable vertical extension, in addition to making it aesthetically unattractive, may entail seizures or jamming during the sliding of the covering element.
  • Another shortcoming lies in the possible difficulty in the unlocking operation under normal conditions, in which the user is required to apply, with a certain force, a downward thrust on the cover element to disengage the pins from the lateral slots of the cover element itself.
  • European Patent Application EP 2913461 A1 has been proposed, on which is based the preamble of claim 1, consisting of a security device of a cylinder lock that includes a cylindrical casing associable to said lock and provided with an axial opening wherein to house a cylinder of said lock, said opening being eccentric with respect to the centre of the casing.
  • a combinatory unit comprises magnetic means, a slider interposed between the casing and a protective key-plate adapted to be coupled to the casing and provided with a second through opening arranged out of line with respect to the centre of said key-plate so as to be aligned, when in use, with the axial opening.
  • the slider moves between a locking position, in which it occludes the axial opening to prevent access to the cylinder, and an unlocking position in which it allows access to the opening.
  • the switch between the locking position and the unlocking position, and vice versa, is actuatable by a magnetic actuator provided with a combination designed to cooperate with the magnetic means of the combinatory unit.
  • EP 2767656 A1 discloses a lock comprising a cylinder, fixed to a door or door wing, with which a pivot is associated coaxially and rotatably, a lever for closing the door or door wing to a jamb being keyed to the end of the pivot; a separate body can be keyed detachably to the head of the pivot and is provided with magnetic means for the temporary locking of the rotation of the body with respect to the cylinder.
  • the main objective of the present invention is therefore to improve the prior art cylinder lock security device of the above-mentioned patent so as to considerably increase the number of combinations that can be obtained with the combinatory unit.
  • one purpose of the present invention is to provide an improved security device for a cylinder lock without considerably increasing its dimensions with respect to the prior art device from Patent EP 2913461 .
  • Another purpose of the present invention is to provide an improved security device for a cylinder lock in which the structural simplicity and the ease of using it remain unchanged, or are improved, with respect to the device known from EP 2913461 .
  • One not secondary purpose is to provide an improved security device for a cylinder lock that achieves the objective and purposes indicated above at competitive costs and that can be obtained with the usual well-known machinery, plants and equipment.
  • a security device adapted to be coupled to a cylinder lock
  • said security device comprising a casing associable to said lock and provided with a first axial opening adapted to house a cylinder of said lock, said first axial opening being eccentrically arranged in respect to the center of said casing, a protective key-plate adapted to be coupled to said casing, said protective key-plate being provided with a second through-opening eccentrically arranged in respect to the center of said protective key-plate such that said second through-opening is aligned, in use, with said first opening, a slider movable in respect to said casing between a locking position, wherein said slider occludes said first opening in order to prevent, in use, accessing said cylinder, and an unlocking position, wherein said slider allows accessing said first opening, and a magnetic combinatory unit movable together with said slider, a cavity facing, in use, said casing being provided on an inner surface of said protective key-plate, said cavity having a substantially linear extension and being arranged substantially
  • the device is furthermore characterized in that said magnetic combinatory unit includes at least four satellites, namely a first satellite, a second satellite, a third satellite and a fourth satellite each containing respective magnetic means, said at least four satellites being adapted to be rotatably housed into respective seats provided on said slider, said seats being mutually arranged at right angles, wherein said first recess axially faces said third recess and said second recess axially faces said fourth recess, said blocking means being controlled by said at least four satellites, wherein each of said first satellite, second satellite, third satellite and fourth satellite comprises one respective cut, said blocking means further comprising a first flared portion and a second flared portion respectively connecting said heads to the respective pins, said first flared portion being adapted to selectively cooperate with the respective cuts of said first satellite and said third satellite and said second flared portion being adapted to selectively cooperate with the respective cuts of said second satellite and said fourth satellite.
  • said magnetic combinatory unit includes at least four satellites, namely a first satellite, a second
  • the reference numeral 1 indicates a security device for a cylinder lock according to the present invention.
  • the device comprises a casing 2, generally of cylindrical shape, designed to be associated to a lock and provided with a first axial opening 3 for inserting a cylinder (not shown in the enclosed figures).
  • the first opening 3 is arranged in an eccentric position with respect to the centre of the casing 2.
  • a key-hole protection disk 4 can advantageously be provided rotatably associated to the casing 2 in a position corresponding to the first opening 3.
  • the key-hole protection disk 4 is provided with a slit 5 to allow the insertion of a key in the lock cylinder.
  • a protective key-plate 6 can be coupled to the casing 2 from the side opposite the direction of insertion of the cylinder so that, when in use, it is positioned on the door front facing outward.
  • the protective key-plate 6 is provided with a second through opening 7 arranged eccentrically with respect to the centre of the key-plate 6 so that, when the device is mounted in place, it is positioned substantially aligned, preferably coaxially, with the first opening 3 of the casing 2 and, if present, with the key-hole protection disk 4.
  • a cavity 9 having an essentially rectilinear extension and oriented parallel to the medial axis passing through the second opening 7 and the key-plate 6.
  • guide means 10, 11 consisting for example of a first guide surface 10 on one side of the cavity 9 and of a second guide surface 11 on the opposite side.
  • the guide means 10, 11 include engaging means whose function will be better explained below, comprising, on one side, at least one first recess 12 and a second recess 13 and, on the opposite side, at least one third recess 14 and a fourth recess 15.
  • the first recess 12 is arranged axially facing the third recess 14, and the second recess 13 is arranged axially facing the fourth recess 15.
  • the walls of the cavity 9, or the first guide surface 10 and the second guide surface 11, are joined near the respective recesses 12, 13 and 14, 15 through an inclined plane or arc segment.
  • a slider 16 is slidably accommodated inside the cavity 9 and movable between a locking position ( figs. 3, 4 ), in which the slider 16 occludes the second opening 7 so as to close off and prevent access to the cylinder of the lock through the first opening 3 and, if present, the slit 5 on the key-hole protection disk 4, and an unlocking position ( figs. 7, 8 , 9 ), in which the slider 16 frees the passage through the second opening 7 to allow the user to insert the key into the cylinder through the slit 5 and the opening 3.
  • a locking position figs. 3, 4
  • an unlocking position figs. 7, 8 , 9
  • the slider 16 In the body of the slider 16 can be housed a combinatory unit of magnetic type that is thus movable together with the slider 16.
  • the combinatory unit includes at least four satellites 17, 18, 19, 20, each containing, within suitable cavities, respective magnetic means 21, 22, 23, 24; the rotation of the satellites, actuated by a suitable magnetic actuator as will be better explained below, allows or blocks the sliding of the cursor 16 by means of suitable blocking means 25, 26 controlled by the satellites 17, 18, 19, 20.
  • suitable blocking means 25, 26 At the travel limit positions of the slider 16, that is, when the slider 16 is in the upper, or locking, position to close the second opening 7 or in the lower, or unlocking position, the blocking means 25, 26 engage the engaging means, comprising the recesses 12, 13 and 14, 15, to stably block the slider 16 in those positions.
  • each satellite 17, 18, 19, 20 is provided a respective first cut 38, a second cut 39, a third cut 40 and a fourth cut 41.
  • the blocking means 25, 26 include a pair of pins 27, 28 provided with respective heads 30A, 30B having shapes, preferably semi-spherical, that are complementary to the shape of the recesses 12, 13, 14, 15 so that the heads 30A, 30B can selectively engage the recesses 12 and 14 or the recesses 13 and 15, depending on the operating position of the device.
  • the pins 27, 28 have respective flared connecting portions 29A, 29B between the heads 30A, 30B and the stems of the pins 27, 28; the flared portion 29A of the pin 27 is suitable to cooperate with the first and the third cut 38, 40, while the flared portion 29B of the pin 28 is designed to cooperate with the second and the fourth cut 39, 41 in accordance with the operating modes that will be better explained below.
  • the pins 27, 28 are slidingly housed in a through hole 31 or in respective coaxial and opposite blind holes formed transversally to the slider 16 so that said pins 27, 28 are arranged axially opposite to each other and oriented with their heads facing in opposite directions.
  • the pins 27, 28 slide counter to the bias of elastic means, such as a respective first spring 32 and second spring 33 arranged coaxially with the pins 27, 28 and in contact with suitable engagement means formed in the hole 31, or a single spring biasing against the heads of the pins 27, 28.
  • elastic means such as a respective first spring 32 and second spring 33 arranged coaxially with the pins 27, 28 and in contact with suitable engagement means formed in the hole 31, or a single spring biasing against the heads of the pins 27, 28.
  • the slider 16 is provided with a first seat 34, a second seat 35, a third seat 36 and a fourth seat 37 of essentially circular shape and reciprocally arranged two by two along parallel axes to essentially form a square or a rectangle.
  • the seats 34, 35, 36, 37 are suitable to accommodate respectively, in a rotatable manner, the first, the second, the third and the fourth satellite 17, 18, 19, 20 provided with the respective first, second, third and fourth magnetic means 21, 22, 23, 24.
  • the pairs formed, respectively, by the first seat 34 and second seat 35 and by the third seat 36 and fourth seat 37, and consequently the satellites 17, 18, 19, 20 housed in the respective seats, are arranged axially aligned with each other along an axis parallel to the axis defined by the through hole 31 and by opposite sides with respect to the through hole 31.
  • the first, second, third and fourth magnetic means 21, 22, 23, 24 inserted in the respective first, second, third and fourth satellite 17, 18, 19, 20 each comprise a pair of magnets with opposite polarity S-N.
  • Four washers 42, 43, 44, 45 are advantageously provided to maintain and cover the respective satellites 17, 18, 19, 20 in the respective seats 34, 35, 36, 37.
  • the displacement of the slider 16 from the locking position to the unlocking position, and vice versa, is achieved by means of a magnetic actuator 47, known for example from Patent EP 2913461 , provided with further magnetic means arranged according to an appropriate combination and suitable to interact with the first, second, third and fourth magnetic means 21, 22, 23, 24 contained respectively in the first, second, third and fourth satellite 17, 18, 19, 20 to cause the rotation of the latter, as will be better explained later.
  • a magnetic actuator 47 known for example from Patent EP 2913461 , provided with further magnetic means arranged according to an appropriate combination and suitable to interact with the first, second, third and fourth magnetic means 21, 22, 23, 24 contained respectively in the first, second, third and fourth satellite 17, 18, 19, 20 to cause the rotation of the latter, as will be better explained later.
  • the slider 16 has a concavity 46 to avoid interfering, in the unlocking position shown in figure 8 , with the second opening 7.
  • the operation of the device is as follows: in the condition with the door closed with the security device actuated, and therefore with the slider 16 covering the second opening 7 from inside to prevent access to the lock ( figs. 3, 4 ), the first spring 32 pushes axially the head 30A of the first pin 27 into engagement with the first recess 12, while the second spring 33 pushes axially the head 30B of the second pin 28 into engagement with the third recess 14 along the same axis defined by the hole 31.
  • the satellites 17, 18, 19, 20 are arranged so that a circumferential portion of each of them engages the flared portions 29A, 29B of the pins 27 and 28, in particular the first and the third satellite 17, 19 engage the flared portion 29A of the first pin 27, and the second and the fourth satellite 18, 20 engage, from an opposite side, the flared portion 29B of the second pin 28, blocking thereby the sliding of the pins 27, 28 along the hole 31 to prevent the disengagement of the heads 30A, 30B from the recesses 12, 14.
  • the magnetic means 21, 22, 23, 24 are reciprocally arranged in a casual manner depending on the position imposed on them by the latest operation to unlock the magnetic actuator 47 to bring the device to the closing position.
  • the specific magnetic combination prearranged on the actuator 47 is configured to impose a movement of the magnetic means 21, 22, 23, 24 so as to induce a rotation in opposite directions to the satellites 17, 18, 19, 20 to bring the respective cuts 38, 39, 40, 41 to face the flared portions 29A, 29B of the pins 27, 28.
  • the first and the third satellite 17, 19 accomplish respectively a rotation in a clockwise and a counterclockwise direction to bring the respective cuts 38, 40 to face the flared portion 29A, while the second and the fourth satellite 18, 20 rotate respectively in a counterclockwise and clockwise direction to bring the respective cuts 39, 41 to face the flared portion 29B.
  • the arc-shaped or inclined-plane profile of the walls of the cavity 9, or of the guide means 10, 11 if present, makes it possible to advance the pins 27, 28 slidingly along the hole 31 to disengage the heads 30A, 30B from the recesses 12, 14, overcoming the elastic reaction of the springs 32, 33, as exemplified in figure 6 ; in this manner, the second opening 7 is gradually made accessible to make it possible, once the operation is completed, to insert the key to open the lock.
  • the increase of the number of satellites does not also entail an increase in the dimension and size of the device, which however remains compact and can be matched with the standard dimensions of the locks.
  • This is thanks to the particular compact configuration of the combinatory unit, in which the satellites 17, 18, 19, 20 are housed in the slider 16 aligned two by two from opposite sides with respect to the blocking means 25, 26 that block the movement of the slider 16.
  • the blocking means 25, 26 are thus interposed between the two pairs of satellites so as to be able to interact simultaneously with two satellites arranged perpendicularly with respect to the axis defined by the blocking means 25, 26.
  • the device according to the present invention is also of simple construction and easy for the user to use.

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  • Lock And Its Accessories (AREA)
EP19155698.4A 2018-02-15 2019-02-06 Security device for a cylinder lock Active EP3527754B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000002717A IT201800002717A1 (it) 2018-02-15 2018-02-15 Dispositivo perfezionato di protezione di una serratura

Publications (2)

Publication Number Publication Date
EP3527754A1 EP3527754A1 (en) 2019-08-21
EP3527754B1 true EP3527754B1 (en) 2020-07-29

Family

ID=62143485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19155698.4A Active EP3527754B1 (en) 2018-02-15 2019-02-06 Security device for a cylinder lock

Country Status (3)

Country Link
EP (1) EP3527754B1 (it)
ES (1) ES2823679T3 (it)
IT (1) IT201800002717A1 (it)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20110068A1 (it) * 2011-05-20 2012-11-21 Pier Luigi Oliana Struttura di dispositivo di protezione, particolarmente per una serratura di una porta o anta.
ITTV20130018A1 (it) * 2013-02-15 2014-08-16 Pier Luigi Oliana Struttura di serratura per una porta o anta.
EP2913461B1 (en) * 2014-02-28 2016-10-12 Pier Luigi Oliana Security device for a cylinder lock

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP3527754A1 (en) 2019-08-21
ES2823679T3 (es) 2021-05-07
IT201800002717A1 (it) 2019-08-15

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