EP0455577B1 - Serrure pour dispositif antivol - Google Patents

Serrure pour dispositif antivol Download PDF

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Publication number
EP0455577B1
EP0455577B1 EP91610038A EP91610038A EP0455577B1 EP 0455577 B1 EP0455577 B1 EP 0455577B1 EP 91610038 A EP91610038 A EP 91610038A EP 91610038 A EP91610038 A EP 91610038A EP 0455577 B1 EP0455577 B1 EP 0455577B1
Authority
EP
European Patent Office
Prior art keywords
cavity
lock
balls
shaped body
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91610038A
Other languages
German (de)
English (en)
Other versions
EP0455577A1 (fr
Inventor
Frede Nielsen
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.)
Actron Entwicklungs AG
Original Assignee
Actron Entwicklungs AG
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 Actron Entwicklungs AG filed Critical Actron Entwicklungs AG
Publication of EP0455577A1 publication Critical patent/EP0455577A1/fr
Application granted granted Critical
Publication of EP0455577B1 publication Critical patent/EP0455577B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B73/00—Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices
    • E05B73/0017—Anti-theft devices, e.g. tags or monitors, fixed to articles, e.g. clothes, and to be removed at the check-out of shops
    • E05B73/0047—Unlocking tools; Decouplers
    • E05B73/0052—Unlocking tools; Decouplers of the magnetic type
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B73/00—Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices
    • E05B73/0017—Anti-theft devices, e.g. tags or monitors, fixed to articles, e.g. clothes, and to be removed at the check-out of shops
    • 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
    • E05B2015/0472—Made of rubber, plastics or the like
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B39/00—Locks giving indication of authorised or unauthorised unlocking
    • E05B39/002—Locks giving indication of authorised or unauthorised unlocking by releasing a liquid, e.g. ill-smelling or dye

Definitions

  • the invention relates to a lock, preferably for an antitheft device for marking articles for sale, comprising two members, which automatically interlock one another when one member is inserted in a cavity in the other member, the first member being a rod-shaped body with a completely or partially pointed insertion end, whereby said rod-shaped body is capable of engaging a plurality of balls loosely arranged in the cavity of the second member, a third member of magnetizable material being inserted below the loosely arranged balls, where a resilient member with an upward driving force is placed below said third member.
  • US-PS No. 3,858,280 discloses a locking device, where the cavity of one member contains retaining balls for a rod-shaped body.
  • the cavity contains furthermore a retaining member pressing the balls against the side wall by means of a spring.
  • the spring is supported by a retaining ring in the bottom of the housing.
  • the retaining ring is relatively difficult to mount in a groove in the inner side of the cavity.
  • German Auslegeschrift No. 2,548,546 discloses furthermore a lock for an antitheft device.
  • the lock comprises a pin-like insertion member insertable in a cavity housing a cone-shaped body.
  • the cone-shaped body is pressed outwards by means of a spring inserted in the cavity.
  • the cone-shaped body comprises some balls pressing against the insertion member when said body is subjected to a pull.
  • the lock comprises a relatively large number of parts with the result that it is difficult to assemble. In addition, it is necessary to process the surface of the lock in order to avoid corrosion.
  • the lock according to the invention is characterised in that the resilient member is an annular plastic member with inward connecting parts connected to a centrally arranged disk-shaped plastic member pressing against the third member in the cavity.
  • Said annular plastic member can be secured to an annular groove in the bottom of the housing by way of squeezing.
  • the resulting lock comprises fewer parts compared to known locks because the bottom and the spring are formed in one piece. Accordingly, the lock is easier to assemble than the known locks.
  • the antitheft device of Figure 1 for marking articles for sale comprises a first member with a shell in form of a top portion 2 and a bottom portion 4.
  • the portions are for instance made of plastics and are secured to one another for instance by way of gluing.
  • a centrally arranged cavity and a circumferential cavity 5 are defined between the portions 2 and 4.
  • the centrally arranged cavity contains one part of the lock, an opening 7 being provided in the bottom portion 4 of the device for the insertion of the second member of the lock.
  • the second member of the lock is a rod-shaped body in form of a pin-like fastening means 1.
  • the circumferential cavity 5 contains a coil and a capacitor adjusted to a desired resonant frequency and is detected when the antitheft device passes a detection zone with an electromagnetic field.
  • Figure 2 is a sectional view of the lock in the shell.
  • the lock comprises two members automatically interlocking one another when one member in form of a rod-shaped body is inserted in a cavity in the other member.
  • the rod-shaped body is inserted in the cavity through a loosely arranged disk 18 of magnetizable material and engages balls 6 loosely arranged in the slightly conical cavity.
  • a third part 8 in form of a cylindrical member of magnetizable material is inserted below the loosely arranged balls 6.
  • a resilient member 10 with an upwardly directed driving force is inserted below the cylindrical member 8 of magnetizable material.
  • the resilient member 10 is an annular plastic member with inward, helical connecting parts 10''.
  • the connecting parts 10'' are connected to a centrally arranged, disk-shaped plastic member 10' with an opening in the middle, said plastic member pressing against the cylindrical member 8 in the cavity.
  • the annular plastic member 10 is secured to a circumferential groove 11 in the bottom of the housing of the lock by way of squeezing.
  • the housing comprises two halves interconnected by way of squeezing.
  • the upper half 14 of the housing is made of brass whereas the lower half 16 is made of plastics.
  • the rod-shaped body 1 is released from the lock when the bottom is subjected to a very strong magnetic field with the result that the balls 6 are forced downwards. While the balls 6 are forced downwards, said balls 6 tend, however, to remain in the cone-shaped cavity.
  • an additional disk 18 of magnetizable material is loosely arranged above the balls 6 and is retained by an inward rim of the brass half 14 of the housing. The disk 18 presses the balls 6 downwards by means of a magnetic field.
  • the needle 1 can be easily retracted by means of a magnetic field device transferring the magnetic field to the upper disk 18.
  • a magnetic field device is illustrated in Figure 4. It comprises a strong cylindrical permanent magnet inserted in an upwardly open, cylindrical, cup-shaped yoke of soft iron.
  • the cone angle in the cavity is approximately 6° and provides such a locking effect that the more the needle 1 is retracted the more the balls 6 are pressed together around said needle 1.
  • a locking effect cannot be achieved without the conical cavity.
  • the iron cylinder 8 below the balls 6 causes a release of the balls 6 and presses the spring 10 downwards when subjected to a magnetic field.
  • the iron cylinder 8 must be of a predetermined thickness in order not to saturate. In other words, the necessary magnetic field should be as strong as possible in order to avoid that unauthorized persons open the lock by means of for instance toy magnets. Such a situation can only be avoided when the cylinder 8 and the spring 10 are of a suitable size and force, respectively.
  • the housing of the lock is made of a non-magnetizable material.
  • a body 16 of plastics is fastened to the outer side of the brass half 14 of the housing.
  • the plastic body 16 is fastened to the brass half 14 by means of a snap device 11.
  • the resilient body 10 is placed in the bottom of the plastic member 16, said resilient body simultaneously forming the bottom part.
  • the bottom part and the spring are formed in one piece.
  • Three helical arms 10'' render it possible to provide a surface facing the cylinder 8, said surface always being perpendicular to the symmetrical axis.
  • the bottom part 10 is caused to press against the cylindrical member 8, the helical arms 10'' turn slightly. At least three helical arms 10'' must be provided in order to avoid a turning over of the bottom part.
  • the bottom part 10 is preferably made of plastics (nylon).
  • the object of forming the lock as described above is to render it possible to use a needle without retaining grooves. Attempts at retracting and screwing out the needle 1 might result in a helical effect. Such attempts are, however, impossible due to an additional safety measure.
  • the balls 6 do not touch one another, the number thereof, i.e. whether one or four balls are present, is of importance. When four balls are present and when said balls are identical and the conical cavity is round, all four balls press on the same cross section of the needle irrespective of how much said needle is retracted. Furthermore, an attempt at turning the needle results in said needle turning in the same groove all the time. In extreme cases with only one ball, it is difficult to center the needle in such a manner that it remains in the same position all the time.
  • the needle will move a short distance.
  • the lower member 4 of the antitheft device has been provided with an inward, circumferential bead 17 pressing against the brass half 14 of the lock.

Landscapes

  • Burglar Alarm Systems (AREA)
  • Lock And Its Accessories (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Adornments (AREA)

Claims (4)

  1. Serrure, de préférence pour un dispositif antivol destiné à marquer des articles de vente, comprenant deux éléments qui s'emboîtent automatiquement l'un dans l'autre lorsqu'un élément est inséré dans une cavité de l'autre élément, le premier élément étant un corps en forme de tige (1) avec une extrémité d'insertion complètement ou partiellement effilée, au moyen de laquelle ledit corps en forme de tige (1) est capable de s'engager avec une pluralité de billes (6) disposées librement dans la cavité du second élément, un troisième élément (8) en matériau magnétisable étant inséré sous les billes (6) disposées librement, un élément élastique avec une force d'entraînement vers le haut étant placé en-dessous dudit troisième élément (8), caractérisée en ce que ledit élément élastique (10) est un élément annulaire en plastique avec des pièces de connexion intérieures (10'') connectées à un élément en plastique (10') en forme de disque disposé au centre et pressant contre le troisième élément (8) dans la cavité.
  2. Serrure selon la revendication 1, caractérisée en ce que les pièces de connexion (10'') sont hélicoïdales.
  3. Serrure selon la revendication 1 ou 2, caractérisée en ce que l'élément annulaire en plastique comprend trois pièces de connexion hélicoïdales (10'').
  4. Serrure selon la revendication 1, caractérisée en ce que l'élément annulaire en plastique est fixé à une rainure circonférentielle au fond du boîtier en y étant comprimé.
EP91610038A 1990-05-03 1991-05-02 Serrure pour dispositif antivol Expired - Lifetime EP0455577B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK1104/90 1990-05-03
DK110490A DK167465B1 (da) 1990-05-03 1990-05-03 Laas til en tyverisikringsmarkoer

Publications (2)

Publication Number Publication Date
EP0455577A1 EP0455577A1 (fr) 1991-11-06
EP0455577B1 true EP0455577B1 (fr) 1994-11-17

Family

ID=8101045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91610038A Expired - Lifetime EP0455577B1 (fr) 1990-05-03 1991-05-02 Serrure pour dispositif antivol

Country Status (4)

Country Link
EP (1) EP0455577B1 (fr)
AT (1) ATE114180T1 (fr)
DE (1) DE69105163T2 (fr)
DK (1) DK167465B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003101349A1 (fr) * 2002-06-03 2003-12-11 Cochlear Limited Dispositif medical

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4308750A1 (de) * 1993-03-19 1994-09-22 Esselte Meto Int Gmbh Artikelsicherungselement
GB2340873B (en) * 1998-08-27 2002-03-13 Clan Holdings Ltd Improved security tagging device
CN105155924B (zh) * 2015-09-30 2017-09-08 杭州聪灵科技有限公司 一种电子锁胆
CN110223599B (zh) * 2019-07-09 2024-01-26 国网安徽省电力有限公司金寨县供电公司 一种电气设备高位标示牌固定装置
CN111877872B (zh) * 2020-08-12 2021-12-07 泉州台商投资区昇一科技有限公司 一种隐蔽式防盗预警锁具
CN112875041A (zh) * 2021-01-20 2021-06-01 国网西藏电力有限公司信息通信公司 一种基于物联网的大数据数字化信息安全装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858280A (en) * 1972-11-17 1975-01-07 I D Engineering Inc Fastening clip
US3911534A (en) * 1974-10-30 1975-10-14 I D Engineering Inc Anti-theft fastening device
DK149540C (da) * 1983-11-04 1987-03-09 Antonson Security As Laas til en tyverisikringsmarkaer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003101349A1 (fr) * 2002-06-03 2003-12-11 Cochlear Limited Dispositif medical

Also Published As

Publication number Publication date
ATE114180T1 (de) 1994-12-15
DE69105163T2 (de) 1995-04-27
DK110490D0 (da) 1990-05-03
DK167465B1 (da) 1993-11-01
EP0455577A1 (fr) 1991-11-06
DK110490A (da) 1991-11-04
DE69105163D1 (de) 1994-12-22

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