EP2119858A1 - Dispositif d'attache - Google Patents

Dispositif d'attache Download PDF

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Publication number
EP2119858A1
EP2119858A1 EP08156194A EP08156194A EP2119858A1 EP 2119858 A1 EP2119858 A1 EP 2119858A1 EP 08156194 A EP08156194 A EP 08156194A EP 08156194 A EP08156194 A EP 08156194A EP 2119858 A1 EP2119858 A1 EP 2119858A1
Authority
EP
European Patent Office
Prior art keywords
ball
lock
uncoupling
pin
holder
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.)
Ceased
Application number
EP08156194A
Other languages
German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
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.)
Nederlandsche Apparatenfabriek NEDAP NV
Original Assignee
Nederlandsche Apparatenfabriek NEDAP NV
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 Nederlandsche Apparatenfabriek NEDAP NV filed Critical Nederlandsche Apparatenfabriek NEDAP NV
Priority to EP08156194A priority Critical patent/EP2119858A1/fr
Publication of EP2119858A1 publication Critical patent/EP2119858A1/fr
Ceased 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
    • 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

Definitions

  • the invention relates to a fastening device used in anti shoplifting tags, hereinafter also called wafers.
  • a fastening means hereinafter also called pin
  • a fastening means hereinafter also called pin
  • a fastening means hereinafter also called pin
  • a fastening means hereinafter also called pin
  • the ball holder is manufactured from a non-magnetically attractive material. This ball holder forces the balls to remain, relative to each other, in one plane perpendicular to the pin.
  • This ball holder forces the balls to remain, relative to each other, in one plane perpendicular to the pin.
  • For removing the pin hereinafter also called uncoupling, use is made of a powerful magnetic field of an uncoupling apparatus. Upon uncoupling, the balls are pulled loose from the conically formed space, whereby the pin can be taken from the ball lock.
  • a particular force is required, hereinafter also called extraction force.
  • the ball lock is a mechanically self-powered construction. Ball locks are known from patent application EP1091063A2 and patent NL1003781 of applicant.
  • the wafers are fastened to these products.
  • These wafers are electronic detection plates which can be detected when they are present in the electromagnetic field of antennas that are usually positioned at entrances and exits of shopping areas to be protected.
  • the wafer is fastened to the article to be protected by means of a pin which is inserted into the article to be protected, whereupon the pin is inserted into the ball lock of the wafer.
  • the wafer is now protected against fraudulent removal.
  • the wafer is removed by the shop staff. Removing the wafer from a secured article is carried out with the aid of a magnetic field of an uncoupling apparatus that uncouples the balls from the pin. If a customer, intentionally or unintentionally, forgets to have the wafer removed, the wafer is detected at the shop exit by the antennas placed there. These will then produce a signal.
  • the maximum applicable length of the pin is limited because otherwise the distance between the balls and the magnetic field of the uncoupling apparatus becomes too great in order to apply sufficient force to the balls and to thus uncouple the ball lock. Utilization of a longer pin is desirable for securing thicker products, such as padded winter clothing.
  • the lock bush must be manufactured from a non-ferrous metal because otherwise, the magnetic field of the uncoupling apparatus is redirected by the lock bush around the balls and can therefore no longer apply force to the balls in the ball lock.
  • the magnitude of the extraction force is related to the hardness of the lock bush. In order to have the required extraction force, use should be made of an especially hard non-ferrous metal for the lock bush. From a point of view of costs, this material is less favourable than steel.
  • the clamping of the pin by the balls in the lock bush can be temporarily interrupted upon a mechanical impulse, for instance a blow on the knob of the wafer.
  • the cause is that the force which the coil spring can apply is relatively light with respect to the mass times the acceleration of the ball holder and balls. This may result in that, directly after the mechanical impulse, the pin is released from the wafer.
  • the object of the invention is to eliminate or improve at least one of the outlined drawbacks. It is also an object of the present invention to provide alternative constructions which are simpler in manufacture and use and which can furthermore be manufactured comparatively inexpensively. Alternatively, an object of the invention is to provide the public with an at least useful choice.
  • the invention provides a ball lock for use in, for instance, a wafer for protection against shoplifting, which ball lock is provided with a lock bush having a conical inner wall, a ball holder received in the lock bush so as to be movable in an axial direction thereof, with one or several balls, and a compression spring engaging an axial end of the ball holder, for pressing the ball holder and the at least one ball in the lock bush against the conical inner wall, wherein the ball holder is provided with an axial bore to allow a pin to be received therein and with a surface that links up perpendicularly with the axial bore to force the at least one ball to be able to move only in a plane perpendicular to the axial bore, wherein the ball holder is provided with a projecting part which extends in axial direction from the axial end of
  • the uncoupling part of the ball lock is designed as a separate element that is connected to the projecting part of the ball holder by means of a snap connection.
  • the ball lock can not only be assembled in a simple manner, but also, different uncoupling parts can be utilized as desired.
  • the uncoupling part is of annular design.
  • the ball lock according to the invention is further provided with a lock housing fitted on the lock bush.
  • the lock housing can be fitted on the lock bush by a snap connection.
  • the parts of the ball lock can be assembled in advance as an independent unit.
  • the projecting part of the ball holder projects through the lock housing from the ball lock.
  • the compression spring is completely within the lock housing and is thus better protected against means of force, such as fire or cutting tools.
  • the invention further provides a shoplifting detection tag, such as a wafer, to be fastened to articles in a shop, which shoplifting detection tag is provided with a fastening device in the form of a ball lock and an opening, wherein a pin can be inserted through the opening into the ball lock, with, in the ball lock, a conical space defined by a wall, with, included therein, one or several balls and a ball holder, which encloses at least partly the at least one ball and which forces the at least one ball to remain in one plane perpendicular to the pin, wherein the ball holder and the at least one ball are pressed by a spring against the wall of the conical space and the pin, so that, due to the balls clamping themselves in the conical space, the pin cannot be removed, wherein, for removing the pin a powerful magnetic field is to be presented, wherein an uncoupling part, which is designed to be attracted by a magnetic field for releasing the fastening device, is provided at a distance from the conical space
  • a fastening device wherein a pin can be inserted through an opening into a ball lock, having therein, in a conical space, one or more balls, completely or partly enclosed by a ball holder which forces the balls to remain in one plane perpendicular to the pin, wherein they are pressed by a spring against the wall of the conical space and the pin, so that due to the balls clamping themselves in the conical part, the pin can not be removed, wherein for removing the pin, a powerful magnetic field is to be presented, wherein the part that is attracted for releasing the fastening device, the uncoupling part, is spatially separated from the parts of the actual clamping part in the ball lock.
  • the maximum distance of the ball lock with respect to the magnet construction of the uncoupling apparatus is not limited by decreasing magnetic force, so that the distance of the actual clamping device can come to lie further from the magnet construction, whereby the length of the pin that can be inserted into the lock is no longer limited by the maximum distance between the actual clamping device and the magnet construction of the uncoupling apparatus.
  • the ball holder is provided with a projecting part and that the uncoupling part engages a free end of the projecting part.
  • the uncoupling part can be provided, by means of a snap connection, on the projecting part of the ball holder.
  • the shoplifting detection tag or wafer is provided with a first and second dish part forming an outside, wherein the ball lock is included between the first and second dish parts.
  • the coil spring of the ball lock is difficulty accessible when sabotaged from the outside.
  • a top of the first dish part in the proximity of the spring of the ball lock has an outward protrusion such that the outside is at a safe distance from the spring with respect to means of force, such as fire or cutting tools. Owing to this feature, it is not possible to sabotage the ball lock / the clamping device by heating and softening the plastic dish part by means of a flame and thus removing the coil spring from the wafer. Nor is it possible to sabotage the ball lock or its clamping device by removing the coil spring after cutting open the plastic dish part.
  • Fig. 1 shows the known ball lock.
  • the outside of the wafer is provided with two plastic dish parts 1 and 7.
  • the ball lock is fitted.
  • This is provided with a round lock bush 3, made of a special hard type of brass.
  • the ball holder 5 In this lock bush is placed the ball holder 5.
  • This ball holder is manufactured from a material that is not attracted by a magnet.
  • this ball holder there are three tempered steel balls 4.
  • the ball holder and the balls are pressed-on in the lock bush by a coil spring 6.
  • the ball lock is fitted in dish part 1, by a snap connection with lock bush 3.
  • Fig. 2 shows the construction of the ball lock according to the invention.
  • the improved ball lock according to the invention is provided with a round, steel lock bush 3.
  • the ball holder 5 is placed.
  • This ball holder is manufactured from a material which is not attracted by a magnet.
  • this ball holder there are three tempered steel balls 4.
  • the ball holder and the balls are pressed-on in the lock bush by a conical coil spring 6.
  • This coil spring is dimensioned such that snapping of the fastening of the pin by a mechanical impulse, for instance a blow to the knob of the wafer, is not possible.
  • lock housing 8 On the lock bush 3, lock housing 8 is provided, this is a plastic part that is fitted on the lock bus 3 by means of a snap connection.
  • a part of the ball holder projects from the lock.
  • the uncoupling part 9 On this projecting part, the uncoupling part 9 is fitted by a snap connection.
  • This uncoupling part 9 is a ring of a material that is attracted by a magnet, such as ferrous metal.
  • the size of the uncoupling part 9, that is fitted last on the ball lock, defines which force the magnet construction of an uncoupling apparatus applies to the lock.
  • Fig. 3 shows the ball lock placed in the wafer with fitted pin 10.
  • the outside of the wafer is provided with a first plastic dish part 1 and a second plastic dish part 7.
  • the protecting pin 10 is inserted at the underside into the opening of the wafer.
  • the balls 4 roll along the conical walls of the lock bush 3 upwards against the pressure of the conical coil spring 6.
  • the balls are forced to remain in one plane perpendicular to the longitudinal direction of the protecting pin, independently of the position of the ball holder.
  • the balls 4 clamp tight between the conical wall of the lock bush 3 and the pin 10, so that a clamping force is created that is such that the pin cannot be removed.
  • Fig. 4 shows the situation when at the top of the wafer a powerful magnetic field is provided which comes from an uncoupling apparatus 11.
  • This magnetic field attracts only the uncoupling part 9 of the ball lock, against the spring pressure of the conical coil spring 6.
  • the balls 4 come to lie somewhat higher in the conical portion of the lock bush 3, so that the balls are free from the conical part and the pin 10.
  • the clamping of the pin is removed and the pin can be removed from the wafer.

Landscapes

  • Burglar Alarm Systems (AREA)
EP08156194A 2008-05-14 2008-05-14 Dispositif d'attache Ceased EP2119858A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08156194A EP2119858A1 (fr) 2008-05-14 2008-05-14 Dispositif d'attache

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08156194A EP2119858A1 (fr) 2008-05-14 2008-05-14 Dispositif d'attache

Publications (1)

Publication Number Publication Date
EP2119858A1 true EP2119858A1 (fr) 2009-11-18

Family

ID=39870080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156194A Ceased EP2119858A1 (fr) 2008-05-14 2008-05-14 Dispositif d'attache

Country Status (1)

Country Link
EP (1) EP2119858A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015055017A1 (fr) * 2013-08-26 2015-04-23 欧隆安防科技（上海）有限公司 Étiquette anti-effraction
CN107165511A (zh) * 2017-06-26 2017-09-15 杭州中芯微电子有限公司 锁扣结构及磁力锁
CN110043139A (zh) * 2019-03-12 2019-07-23 杭州思创汇联科技有限公司 一种商品的保护装置及其使用方法
CN113789997A (zh) * 2021-08-18 2021-12-14 上海返场文化传播有限公司 一种锁扣及解锁装置
EP4310282A3 (fr) * 2019-07-08 2024-04-03 Sensormatic Electronics, LLC Étiquette de sécurité avec embrayage à 3 billes pouvant être libéré perpendiculairement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590461A (en) * 1984-10-05 1986-05-20 Knogo Corporation Tamper resistant target wafer and fastener assembly
DE8903818U1 (fr) * 1989-03-28 1989-05-18 Ott, Frank, 6650 Homburg, De
NL1003781C2 (nl) 1996-08-12 1998-02-20 Nedap Nv Bevestigingsinrichting.
EP1091063A2 (fr) 1999-10-08 2001-04-11 N.V. Nederlandsche Apparatenfabriek NEDAP Serrure à billes pour etiquette antivol
EP1391574A2 (fr) 2002-07-29 2004-02-25 Johan Skjellerup Etiquette de sécurité
WO2006015499A1 (fr) * 2004-08-12 2006-02-16 Stoba Ag Dispositif de fixation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590461A (en) * 1984-10-05 1986-05-20 Knogo Corporation Tamper resistant target wafer and fastener assembly
DE8903818U1 (fr) * 1989-03-28 1989-05-18 Ott, Frank, 6650 Homburg, De
NL1003781C2 (nl) 1996-08-12 1998-02-20 Nedap Nv Bevestigingsinrichting.
EP1091063A2 (fr) 1999-10-08 2001-04-11 N.V. Nederlandsche Apparatenfabriek NEDAP Serrure à billes pour etiquette antivol
EP1391574A2 (fr) 2002-07-29 2004-02-25 Johan Skjellerup Etiquette de sécurité
WO2006015499A1 (fr) * 2004-08-12 2006-02-16 Stoba Ag Dispositif de fixation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015055017A1 (fr) * 2013-08-26 2015-04-23 欧隆安防科技（上海）有限公司 Étiquette anti-effraction
CN107165511A (zh) * 2017-06-26 2017-09-15 杭州中芯微电子有限公司 锁扣结构及磁力锁
CN107165511B (zh) * 2017-06-26 2022-08-23 杭州中芯微电子有限公司 锁扣结构及磁力锁
CN110043139A (zh) * 2019-03-12 2019-07-23 杭州思创汇联科技有限公司 一种商品的保护装置及其使用方法
EP4310282A3 (fr) * 2019-07-08 2024-04-03 Sensormatic Electronics, LLC Étiquette de sécurité avec embrayage à 3 billes pouvant être libéré perpendiculairement
CN113789997A (zh) * 2021-08-18 2021-12-14 上海返场文化传播有限公司 一种锁扣及解锁装置

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