EP2056307B1 - Dispositif de déclenchement destiné au déclenchement de sécurités contre le vol pouvant être déclenchées de manière magnétique - Google Patents

Dispositif de déclenchement destiné au déclenchement de sécurités contre le vol pouvant être déclenchées de manière magnétique Download PDF

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Publication number
EP2056307B1
EP2056307B1 EP08163674A EP08163674A EP2056307B1 EP 2056307 B1 EP2056307 B1 EP 2056307B1 EP 08163674 A EP08163674 A EP 08163674A EP 08163674 A EP08163674 A EP 08163674A EP 2056307 B1 EP2056307 B1 EP 2056307B1
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EP
European Patent Office
Prior art keywords
magnet
release device
segmented
magnetic core
magnetised
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Application number
EP08163674A
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German (de)
English (en)
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EP2056307A1 (fr
Inventor
Albert Maurer
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/02Permanent magnets [PM]
    • H01F7/0273Magnetic circuits with PM for magnetic field generation
    • H01F7/0278Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B73/00Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices
    • E05B73/0017Anti-theft devices, e.g. tags or monitors, fixed to articles, e.g. clothes, and to be removed at the check-out of shops
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/02Permanent magnets [PM]
    • H01F7/0205Magnetic circuits with PM in general
    • H01F7/021Construction of PM
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/32Buckles, buttons, clasps, etc. having magnetic fastener
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/50Readily interlocking, two-part fastener requiring either destructive or tool disengagement

Definitions

  • the present invention describes a release device for releasing magnetically releasable anti-theft devices consisting of a release-side cover plate and a support plate or support base plate between which serving to solve the anti-theft permanent magnet elements are arranged.
  • a release device for solving theft is in the EP0047264 discloses wherein a ring magnet and a magnetic disk are vertically spaced from one another, forming a plurality of horizontally lying layers, and vertically bounded by a cover plate and a bottom plate.
  • the ring magnet and the magnetic disk have different strength magnetic field strengths and can be made of different materials.
  • the release device has a sandwich-like shape in the vertical direction, wherein the Magnetic disc is located on the bottom plate and is surrounded by a steel disc, which also lies on the bottom plate. On the steel disk, the ring magnet is vertically spaced from the magnetic disk.
  • the magnetic field lines are mainly vertical and thus axially in the direction of the magnetic disk, so that a force component acts mainly in the vertical direction.
  • the described structure has a sandwich-like shape in the vertical direction, whereby a corresponding height results.
  • a corresponding height results.
  • the height of the entire release device is further increased. Since the anti-theft device must be brought close to the strongly magnetized magnetic disk, so that the magnetic field is sufficiently large, holes are provided, the diameter of the anti-theft devices must be sufficiently large. With this structure, this does not guarantee that all Theft locks are removable because the diameter of the anti-theft devices vary.
  • the present invention has for its object to provide a device for solving the magnetically releasable anti-theft devices, which has a vertical single-layer and flat structure, which is simple and easy to produce material and particularly space-saving next to the cash register in a table top or the like can be lowered.
  • a release device 1 which is based on a Halbach array, which has a strong magnetic top 10 and a weak magnetic bottom 11.
  • a Halbach array has the special property that due to the suitable arrangement of the permanent magnet elements the magnetic field is concentrated on the strongly magnetic upper side 10, while on the upper side 10 opposite underside 11 almost no magnetic field lines emerge from the Halbach array, whereby only one weak magnetic field near the bottom 11 is measurable.
  • the release device 1 consists of a plurality of permanent magnet elements, which are adjacent to each other and embedded in one another in a plane, wherein the magnetization directions of directly adjacent permanent magnet elements are arranged in mutually approximately perpendicular planes.
  • the magnetization direction of the individual permanent magnet elements is, as usual in physics, indicated by an arrow whose arrowhead points to the magnetic north pole of the considered permanent magnet element. According to this convention, a representation of the magnetization directions of the individual permanent magnet elements is obtained, as in FIG FIG. 3 indicated.
  • the respective north magnetic poles and south magnetic poles are designated N and S in the figures.
  • the release device 1 for releasing magnetically releasable anti-theft devices has a cover plate 6 which covers the release side on the highly magnetic top 10.
  • the opposite bottom 11 is covered by one of the bracket or the support serving base plate 5.
  • Between the cover plate 6 and the bottom plate 5 is at least one circumferentially closed frame magnet 2, which has a first recess 20 in which further elements can be accommodated.
  • FIG. 1a While in FIG. 1a an annular frame magnet 2 is shown, shows FIG. 2 a rectangular frame magnet 2.
  • the magnetization direction of the at least one frame magnet 2 is approximately perpendicular to the paper plane and thus approximately parallel to the central axis of the annular or rectangular frame magnet 2.
  • the connecting line between the north pole and south pole is oriented approximately perpendicular to the paper plane, the north pole to Bottom 11 of the release device 1 has.
  • a segmented magnet 3 is inserted flush with the frame magnet 2, the magnetization direction is aligned approximately perpendicular to the magnetization direction of the frame magnet 2 and thus is approximately parallel to the paper plane.
  • the frame magnet 2 and the segmented magnet 3 are located in the same plane by the engagement of the segmented magnet 3, resulting in a flat structure.
  • the segmented magnet 3 comprises a plurality of segments 31 and has a second recess 30.
  • the possible two embodiments shown here show segmented magnets 3 each with four segments 31, the south poles of the individual segments 31 abutting against the inner wall of the first recess 20 of the frame magnet 2, while the north poles of the individual segments 31 are facing the second recess 30.
  • a magnetic core 4 is fastened, again in the same plane in which the frame magnet 2 and the segmented magnet 3 are located.
  • the magnetic core 4 has a magnetization direction approximately parallel to its central axis, wherein the vector arrow of the magnetization direction to the top 10 of the release device 1 shows.
  • the magnetic north pole of the magnetic core 4 thus has, in contrast to the frame magnet 2 in the direction of the upper side 10 of the release device.
  • the first recess 20 and the second recess 30 should each be mounted centrally in the frame magnet 2 and in the segmented magnet 3. Optimum results were achieved with the ring-shaped frame magnet 2 and a central first recess 20 in the form of a cylindrical bore and a central second recess 30 in the segmented magnet 3, which in the FIGS. 1a and 1b are shown.
  • the problem is the arrangement and attachment of the permanent magnet elements, since the same magnetic poles of adjacent permanent magnet elements partially overlap and therefore sometimes very large repulsive forces occur.
  • the frame magnet 2, the segmented magnet 3 and the magnetic core 4 can be glued to the bottom plate 5 and connected to it inseparably.
  • the individual segments 31 are also glued in the first recess 20 to the inner surfaces of the frame magnet 2 for stabilization.
  • the cover plate 6 is permanently attached to the top 10, so that a compact single-layer release device 1 results from permanent magnet elements, for example, in a Table top can be inserted.
  • two components epoxy resins are used for bonding the individual permanent magnet elements.
  • the use of high magnetic materials, high remanence magnetic materials such as samarium cobalt, neodymium-iron-boron and aluminum-nickel-cobalt makes it possible to reduce the thickness of the release device 1, thereby providing dissolvers 1 in disk shapes of 15 mm to 10 mm are possible.
  • the cover plate 6, as well as the bottom plate 5 are made of chrome steel and are used in addition to design purposes, the protection of the permanent magnet elements.
  • neodymium-iron boron is used for the dissolution devices disclosed herein.
  • the vertical height of either the frame magnet 2 or the segmented magnet 3 is selected to be higher than the structural height of the magnetic core 4 and thus the magnetic core 4 in the direction of the top 10 is surmounted by the other permanent magnet elements, creating a well on the highly magnetic Top 10, whereby the magnetic field on the top 10 is still increased by about 10% to 20% compared to the planar design.
  • segmented magnet 3 consisting of four segments 31 has hitherto been described so far in a preferred embodiment, it is also possible for only one annular segment 31 to form the magnet 3. In order to produce a release device according to the invention, the number of segments 31 must be at least one.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Burglar Alarm Systems (AREA)
  • Lubricants (AREA)

Claims (9)

  1. Dispositif de détachement (1) pour le détachement de sécurités antivol détachables de façon magnétique comprenant une plaque de recouvrement (6) côté détachement et une plaque de fond (5) servant au maintien ou au support, entre lesquelles sont disposés des éléments à aimant permanent servant au détachement de la sécurité antivol,
    caractérisé en ce que
    un aimant-cadre (2) fermé sur le pourtour est magnétisé dans le sens axial et présente un premier évidement (20), dans lequel
    est disposé un aimant (3) segmenté se présentant sous la forme d'au moins un segment (31) magnétisé dans le sens radial, le ou les segment(s) (31) libérant un second évidement (30), dans lequel est emboîté un noyau (4) magnétique magnétisé dans le sens axial, de sorte que le dispositif de détachement représente un agencement monocouche dans le sens vertical et plat d'éléments à aimant permanent.
  2. Dispositif de détachement selon la revendication 1, caractérisé en ce que l'aimant-cadre (2), l'aimant (3) segmenté et le noyau (4) magnétique sont fixés de façon indétachable sur la plaque de fond (5).
  3. Dispositif de détachement selon la revendication 1, caractérisé en ce que l'aimant-cadre (2), l'aimant (3) segmenté et le noyau (4) magnétique sont conçus en forme de disque circulaire.
  4. Dispositif de détachement selon la revendication 1, caractérisé en ce que le premier évidement (20) et le second évidement (30) sont des percements avec des surfaces de section circulaires.
  5. Dispositif de détachement selon la revendication 1, caractérisé en ce que la plaque de recouvrement (6) dépasse des dimensions radiales de l'aimant-cadre (2), le dispositif de détachement (1), emboîté dans un évidement, pouvant être fixé par complémentarité de formes.
  6. Dispositif de détachement selon la revendication 1, caractérisé en ce que la hauteur de structure de l'aimant-cadre (2) est choisie plus grande que les hauteurs de structure de l'aimant (3) segmenté et du noyau (4) magnétique.
  7. Dispositif de détachement selon la revendication 1, caractérisé en ce que la hauteur de structure de l'aimant (3) segmenté est choisie plus grande que la hauteur de structure de l'aimant-cadre (2) et du noyau (4) magnétique.
  8. Utilisation d'un dispositif de Halbach dans un dispositif de détachement pour le détachement de sécurités antivol maintenues de façon magnétique,
    comprenant un aimant-cadre (2) fermé sur le pourtour et magnétisé dans le sens axial, qui présente un premier évidement (20), dans lequel est disposé un aimant (3) segmenté sous la forme d'au moins un segment (31) magnétisé dans le sens radial, le ou les segment(s) (31) libérant un second évidement (30), dans lequel est emboîté un noyau (4) magnétique magnétisé dans le sens axial, le dispositif de détachement présentant un agencement vertical et plat d'aimants permanents.
  9. Utilisation selon la revendication 8 d'un dispositif de détachement selon la revendication 6, caractérisé en ce que le dispositif de Halbach est formé par
    l'aimant-cadre (2),
    l'aimant (3) segmenté sous la forme d'au moins un segment (31) magnétisé dans le sens radial et
    le noyau (4) magnétique,
    à chaque fois des éléments voisins à aimant permanent étant magnétisés les uns par rapport aux autres et orientés en alternance dans des plans perpendiculaires entre eux.
EP08163674A 2007-10-01 2008-09-04 Dispositif de déclenchement destiné au déclenchement de sécurités contre le vol pouvant être déclenchées de manière magnétique Active EP2056307B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH15182007 2007-10-01

Publications (2)

Publication Number Publication Date
EP2056307A1 EP2056307A1 (fr) 2009-05-06
EP2056307B1 true EP2056307B1 (fr) 2010-12-22

Family

ID=40351793

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EP08163674A Active EP2056307B1 (fr) 2007-10-01 2008-09-04 Dispositif de déclenchement destiné au déclenchement de sécurités contre le vol pouvant être déclenchées de manière magnétique

Country Status (4)

Country Link
US (1) US7921524B2 (fr)
EP (1) EP2056307B1 (fr)
AT (1) ATE492892T1 (fr)
DE (1) DE502008002064D1 (fr)

Families Citing this family (18)

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US8054185B2 (en) * 2008-12-17 2011-11-08 Sensormatic Electronics, LLC Optimization of the field profile on a high field strength magnetic detacher
US8305177B2 (en) * 2009-01-12 2012-11-06 Dexter Magnetic Technologies, Inc. Multi function magnetic decoupler
US8615853B2 (en) * 2010-10-12 2013-12-31 Donald P Rathbun Multipole magnet for holding items to clothing
TWI384510B (zh) * 2010-11-12 2013-02-01 Ind Tech Res Inst 均勻磁場產生設備及其磁場產生單元
US8847762B2 (en) * 2011-06-23 2014-09-30 Tyco Fire & Security Gmbh Security system tag magnetic clutch and method
US20130002382A1 (en) * 2011-06-28 2013-01-03 Bo Zhang Magnetic cup assembly holding device with low magnetic leakage field
US20130305497A1 (en) * 2012-05-16 2013-11-21 Ronald E. Coman Permanent magnet panel fastener
CN103915233B (zh) * 2013-01-05 2017-02-08 江苏多维科技有限公司 一种适用于角度磁编码器的永磁体
US20150325352A1 (en) * 2014-05-07 2015-11-12 Anker Technology Co., Limited Magnet fixed device and an electronic device having the same or an accessory having the same
US11178930B2 (en) 2014-08-01 2021-11-23 Carter J. Kovarik Helmet for reducing concussive forces during collision and facilitating rapid facemask removal
US10092057B2 (en) 2014-08-01 2018-10-09 Carter J. Kovarik Helmet for reducing concussive forces during collision and facilitating rapid facemask removal
DE102015104888B4 (de) * 2015-03-30 2018-07-05 Jopp Holding GmbH Anordnung eines Magnetelements mit Lagesensor zur Positionserkennung an einem rotierbaren Maschinenelement
CN105446428A (zh) * 2015-12-18 2016-03-30 包头市英思特稀磁新材料有限公司 一种带有海尔贝克磁组件的键盘
US11587706B2 (en) * 2019-11-01 2023-02-21 Christopher J. de la Rosa Magnetic fastener
US11388996B2 (en) * 2020-08-27 2022-07-19 Hardware Resources, Inc. Slidable cabinet pullout apparatus and method of use
US11896124B2 (en) 2020-08-27 2024-02-13 Hardware Resources, Inc. Concealed apparatus for slidable pullout mounting and method of use
CN113481766B (zh) * 2021-07-08 2025-03-11 西南交通大学 一种直线型Halbach阵列永磁轨道
CN116794291B (zh) * 2023-03-27 2025-12-05 陕西科技大学 一种组合式磁珠反应管及其使用方法

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Also Published As

Publication number Publication date
DE502008002064D1 (de) 2011-02-03
EP2056307A1 (fr) 2009-05-06
US7921524B2 (en) 2011-04-12
ATE492892T1 (de) 2011-01-15
US20090083951A1 (en) 2009-04-02

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