CN101356331B - Magnetic remover with open access - Google Patents

Abstract

Various embodiments of a magnetic detacher with open access are described. In one embodiment, the magnetic detacher includes a magnetic assembly for providing open access to the hard tag and a magnetic field sufficient to disengage the clamping mechanism of the hard tag.

Description

Magnetic detacher with open visit

Background technology

Electronic article surveillance (EAS) system is designed to prevent without permission from the controlled area mobile article.Typical EAS system can comprise monitoring system and one or more safety label.Described monitoring system can be set up interrogation in the accessing points of described controlled area.Safety label can be secured on the article such as the clothes commodity.Enter interrogation if add the article of label, then may trigger alarm, be used for expression and shifted out without permission article with label from described controlled area.Generally, can leave controlled area and before not triggering alarm at the article with label, must be so that safety label be invalid.

Safety label can adopt various ways, comprising soft label and hard label.Usually, soft label is disposable, only be used once, and hard label can be reused.A label that example is back side viscosity of soft label.Soft label can by such as the invalid unit of scanner so that invalid (deactivate), described scanner comes so that described soft label is invalid with specific magnetic field during when its contact or near described soft label.

Hard label generally includes: the plastic label main body, and it has held the EAS sensor; And locking device comprises pin or tack, its by article and the folder to described tag body so that article and label are tightened together.Generally, hard label needs detacher unit to remove tack from tag body, and so that described article can separate with hard label.In some applications, detacher unit can comprise magnet assembly, and it applies magnetic field to discharge described tack to tag body.

Fig. 1 illustrates traditionalhard label 10, and it has plastic label main body 11, and plastic label main body 11 is formed with jut 12.Described tag body 11 is held EAS sensor 13, and it is used for triggering alarm.Describedhard label 10 comprises the tack 14 of the head 15 with expansion.As shown in the figure, tack 14 clamped devices 16 are fastened in the tag body 11.

Fig. 2 illustrates the traditionalmagnetic assembly 20 of detacherunit.Magnet assembly 20 comprisescylindrical magnet 21 and magnetized toroidal magnet 22 on the contrary, and toroidal magnet 22 is stacked on the top of cylindrical magnet 21.As shown in the figure,magnet assembly 20 comprises that the degree of depth is roughly thecavity 23 of 6-7 millimeter.This configuration is applicable well for the traditional hard label such ashard label 10, and wherein, thecavity 23 ofmagnet assembly 20 is compatible with the jut 12 of tag body 11.In order to allow to take out tack 14, jut 12 is inserted in thecavity 23, in order to the high-intensity magnetic field that is used in the toroidal magnet 22.Magnet assembly 20 provides incavity 23 is enough to force clamping device 16 to break away from and allow to take out from tag body 11 magnetic field of the approximate vertical of tack 14.

Tag such as bottle and CD tagged many use in, for example, the clamping device of hard label can be embedded in the existing packing of article, perhaps can have little profile minimizing the possibility of inefficacy, and the placement of item of convenience.For such application and assurance requirement, the different stripping attachment design of needs provides the open visit for the clamping device of described embedding or little profile, and simultaneously, provides enough magnetic field.

Description of drawings

Fig. 1 illustrates traditional hard label.

Fig. 2 illustrates the traditional magnetic assembly of detacher unit.

Fig. 3 illustrates the magnetic detacher according to an embodiment.

Fig. 4 illustrates the magnetic detacher according to an embodiment.

Fig. 5 illustrates the magnetic detacher according to an embodiment.

Fig. 6 illustrates the figure according to an embodiment.

Fig. 7 illustrates the figure according to an embodiment.

The specific embodiment

Can provide a plurality of details at this and understand up hill and dale embodiments of the invention.But those skilled in the art can understand, can be in the situation that there are not these details to put into practice embodiments of the invention.In addition, do not describe known method, process, parts and circuit in detail, in order to do not obscure embodiments of the invention.Be appreciated that concrete structure disclosed herein and function detail can be representational, and must not limit scope of the present invention.

It should be noted that any special characteristic, structure or the characteristic that represent in conjunction with described embodiment describes quoted for " embodiment " is included at least one embodiment in manual.Everywhere the same embodiment of the inevitable all indications of appearance of phrase " in an embodiment " in manual.

Fig. 3 illustrates an embodiment of magnetic detacher 30.In this embodiment,magnetic detacher 30 comprisesmagnet assembly 31, and it comprisescylindrical magnet 32 and toroidal magnet 33.In various implementations,cylindrical magnet 32 andtoroidal magnet 33 can comprise one or more permanent magnets.Usually, permanent magnet has the magnetized axis of restriction of orientation, geometry and the other materials attribute of the magnetic history of depending on, material.

In various embodiment, permanent magnet can comprise such as the paramagnetic parts of samarium (Sm) and neodymium (Nd) with such as the ferromagnetic parts of iron and cobalt (Co).During the making of permanent magnet, can set up the domain structure, magnetization in the domain of its display orientation, this is called as magneto-crystalline anisotropy, is the mechanism that produces high-intensity magnetic field.Permanent magnet can be processed, and described processing comprises the compression of parts when having surrounding magnetic field for example, sintering and the remagnetize of compression material.

The example of permanent magnet includes, but are not limited to neodymium iron boron (NdFeB) magnet, hard ferrite magnet and cobalt magnet, and described cobalt magnet is such as being SmCo (SmCo) magnet and aluminium nickel cobalt (AlNiCo) magnet.Permanent magnet can comprise magnet sintering and/or bonding.Described permanent magnet can comprise that also multiple coating is to stop corrosion.

In each embodiment,magnetic detacher 30 is provided the access of opening by structuring and layout to various magnetic clamping devices.Therefore,magnetic detacher 30 can break away from the clamping structure that is positioned at respect to the hard label of any angle position of its axle.In various implementations,magnetic detacher 30 is configured to provide around the comparatively symmetrical magnetic field of its axle, so that it is used in the hard label of any angle position.

In the embodiment shown in Fig. 3, for example, theupper surface 34 ofcylindrical magnet 32 is roughly coplanar and concentric with the upper surface of toroidal magnet 33.As shown in the figure,cylindrical magnet 32 andtoroidal magnet 33 are substantially flush, allow to admit in any direction hard label.Magnetic detacher 30 so the various magnetic clamping devices in hard label provide open visit.Described embodiment is not limited in this context.

In some embodiment, the upper surface ofcylindrical magnet 32 can upwards or downwards slightly be offset from theupper surface 35 of toroidal magnet 33.For example, theupper surface 34 ofcylindrical magnet 32 can make progress from theupper surface 35 oftoroidal magnet 33 or offset downward the 2-3 millimeter.Described embodiment is not limited in this context.

In various embodiment,magnet assembly 31 comprisestoroidal magnet 33, and it is magnetized diametrically.Toroidal magnet 33 can comprise for example a plurality of part 36-1-n, and wherein, n represents positive integer value, and each direction at the center of pointing totoroidal magnet 33 of a plurality of part 36-1-n is magnetized.In embodiment shown in Figure 3, for example,toroidal magnet 33 is divided into the 36-1 of first, second portion 36-2, third part 36-3 and the 4th part 36-4 by four.In Fig. 3, white arrow represents magnetized direction.In this embodiment, for the first half oftoroidal magnet 33, magnetic flux inwardly points to the center oftoroidal magnet 33, and is bent upwards out outside the toroidal magnet 33.The magnetic field oftoroidal magnet 33 is added to the magnetic field of the upper finger that is produced bycore cylinder magnet 32, produces very strong magnetic field.

In some embodiment, the direction of magnetization shown in Fig. 3 can be reversed.For example,core cylinder magnet 32 can produce the magnetic field of lower finger, andtoroidal magnet 33 can outwards guide the center of magnetic flux fromtoroidal magnet 33.

In various implementations,magnet assembly 31 provides the relatively symmetrical magnetic field around its axle, so thatmagnetic detacher 30 can be used for being positioned at the hard label of any angle position.In some embodiment, soft iron material can be placed in the bottom ofmagnet assembly 31, with acquisition keeper effect, and strengthens Surface field.

In each embodiment,toroidal magnet 33 can be divided into four or more part, and the direction of each magnetic part at the center of pointing totoroidal magnet 33 is magnetized.Be appreciated that be less than in four the situation of part,toroidal magnet 33 can have sizable changes of magnetic field, so clamping device only can break away from specific angle position.

Fig. 4 illustrates an embodiment of magnetic detacher 40.In this embodiment,magnetic detacher 40 comprisesmagnet assembly 41, and it comprisescylindrical magnet 42 and semi-ring magnet 43.In various implementations,cylindrical magnet 42 andsemi-ring magnet 43 can comprise one or more permanent magnets.

In each embodiment,magnetic detacher 40 is provided open access by structuring and layout from the various magnetic clamping devices of a side direction of magnet assembly 41.Therefore,magnetic detacher 40 can break away from the clamping structure that is located at respect to the hard label of the various angle positions of a side of magnet assembly 41.Generally, the height of semi-ring magnet 43 (for example 12 millimeters) will be greater than the height (for example 7 millimeters) of the toroidal magnet 22 ofmagnet assembly 20, with the various clamping devices that provide enough magnetic field to break away from hard label, a side ofmagnetropism assembly 41 provides open access simultaneously.Described embodiment is not limited in this context.

Fig. 5 illustrates an embodiment ofmagnetic detacher 50, and in the present embodiment,magnetic detacher 50 comprisesmagnet assembly 51, and it comprises the firstrectangular magnet 52, the secondrectangular magnet 53 and the 3rd rectangular magnet 54.In various implementations, the firstrectangular magnet 52, the secondrectangular magnet 53 and the 3rdrectangular magnet 54 can comprise one or more permanent magnets.In some embodiment,magnetic detacher 50 can comprise one or more other rectangular magnet.

In each embodiment,magnetic detacher 50 is provided the access of opening by structuring and layout to various magnetic clamping devices.In embodiment shown in Figure 5, for example, the upper surface 57 of theupper surface 55 of the firstrectangular magnet 52, theupper surface 56 of the secondrectangular magnet 53 and the 3rdrectangular magnet 54 is roughly coplanar.As shown in the figure, the firstrectangular magnet 52, the secondrectangular magnet 53 and the 3rdrectangular magnet 54 are substantially flush, allow to hold in any direction hard label.Magnetic detacher 50 so the various magnetic clamping devices in hard label provide the access of opening.Be appreciated that the magnet with rectangular geometry trends towards producing the magnetic field more weak than the magnet with circular geometry, and does not have the symmetry in orientation because asymmetric.Described embodiment is not limited in this context.

Table 1 illustrates the comparison in the Surface field of kilogauss (kG) at center on the cylindrical magnet of various magnetic detachers configuration.Described configuration can comprise toroidal magnet, and it has internal diameter (ID), external diameter (OD) and height (h).

The magnetic detacher configuration	Annular magnetic size (millimeter)	Toroidal magnet volume (cc (cubic centimetre))	Surface field (kG)
				1. cylindrical magnet only	Inapplicable	0cc	5.424kG
2. the toroidal magnet on cylindrical magnet	ID＝15，OD＝30， h＝7	3.68cc	7.068kG
				3. the toroidal magnet that flushes with cylindrical magnet	ID＝24，OD＝44， h＝10	10.68cc	6.426kG
4. the toroidal magnet that flushes with cylindrical magnet	ID＝24，OD＝44， h＝12	12.82cc	7.115kG
				5. the toroidal magnet that flushes with cylindrical magnet	ID＝24，OD＝59， h＝10	22.82cc	7.071kG
6. the semi-ring magnet on cylindrical magnet	ID＝15，OD＝30， h＝12	3.180cc	6.161kG

Table 1

Shown at table 1, use the only stripping attachment configuration of single cylindrical magnet to provide than the lower Surface field of stripping attachment configuration that uses magnet assembly.Use single configurations of magnets realize open visit need to be by removing toroidal magnets 22 from themagnet assembly 20 of magnet only example such as cylindrical magnet.Such means dismounting magnetic field of having compromised, because clamping device must be designed to be opened by weak magnet, so clamping device is caught to be easier to lose efficacy by " outside (street) " magnet.

Also shown in the table 1, can in the situation of the size of suitably having selected to be placed in the toroidal magnet on the cylindrical magnet, realize and the similar magnetic field, magnetic field that is provided by traditional stripping attachment configuration of using the toroidal magnet on cylindrical magnet.Therefore, the access of using the stripping attachment of the toroidal magnet flush with cylindrical magnet to be configured in to provide opening when suitably having selected magnet size and enough magnetic field.For example, the height of toroidal magnet (for example toroidal magnet 33) can be brought up to 12 millimeters, perhaps, external diameter can be brought up to greater than 60 millimeters to obtain to be used for the magnetic field levels greater than 7.1kG of such stripping attachment configuration.In addition, using to have having of superposeing of cylindrical magnet also can provide enough magnetic field greater than the stripping attachment configuration of the semi-circular magnet of 12 millimeters height, allows simultaneously from the open visit of a side of described magnet assembly.Described embodiment is not limited to this context.

Fig. 6 illustrates the embodiment of curve Figure 60, and described curve Figure 60 illustrates the magnetic field levels as the function of the height of the various magnetic stripping attachment configurations of using the toroidal magnet that flushes with cylindrical magnet.As shown in the figure, it is possible using larger magnet further to strengthen magnetic field.Described embodiment is not limited to this context.

Fig. 7 illustrates the embodiment of curve Figure 70, and described Figure 70 illustrates the magnetic field levels as the function of the distance at the center of magnetic surface.As shown in the figure, each embodiment of described magnetic detacher compares with the magnet assembly of magnet and has strengthened magnetic field projection (fieldprojection).In such embodiment, to compare with the magnet assembly of magnet, described magnetic detacher has longer magnetic field projection, allows magnetic detacher to break away from the clamping device of hard label with larger distance.Described embodiment is not limited to this context.

Above-mentioned discussion and magnetic field value are based on the NdFeB magnet that uses level 35.If the magnet of the higher level of the NdFeB magnet of use such aslevel 50, then magnetic field levels will improve 10-15% usually.Described embodiment is not limited to this context.

In various implementations, described embodiment comprises: magnetic detacher is used for providing the access of opening to various hard labels; And enough strong magnetic field levels is used for breaking away from the clamping device of such hard label.Described embodiment can be in the multiple application that tags such as bottle and CD, wherein, the clamping device of hard label can be embedded in the existing packing of article, perhaps can have little profile minimizing the possibility of inefficacy, and the placement of item of convenience.

In various implementations, described embodiment has avoided and need to use large profile or outstanding design in the multiple application that tags such as bottle and CD.In the use such as the very thin outstanding clip of loading onto of the packing of CD, jewel box or glasses problem is often arranged, because outstanding clip easily snaps or is subject to other infringement.The use of outstanding clip has also hindered effective use and has shelved the space, because jut has taken the space, and so that is difficult to stack or arrange commodity.

In various implementations, described embodiment comprises the magnetic detacher that uses magnet assembly, and described magnetic detacher provides than the higher magnetic field levels of stripping attachment configuration that will use single magnet.Such embodiment has avoided being designed for the demand than the clamping device of the hard label of weak magnet, describedly will reduce for invalid antagonism than weak magnet.

Although the special characteristic of embodiment as described in having illustrated as said now for those skilled in the art, can carry out many modifications, substitutes, change and equivalent.Therefore, should be understood that appended claim is intended to contain all such modifications and the change in the true spirit that falls into described embodiment.

Claims (14)

Translated fromChinese

1.一种磁性拆卸器，包括：1. A magnetic detacher comprising:磁性组件，用于向包括夹紧装置的硬标签提供开放的访问，并且用于提供足以脱离所述硬标签的所述夹紧装置的磁场，所述磁性组件包括：A magnetic assembly for providing open access to a hard tag comprising a gripping device and for providing a magnetic field sufficient to disengage said gripping device of said hard tag, said magnetic assembly comprising:圆柱磁体；以及cylindrical magnets; and环形磁体，其具有与所述圆柱磁体的上表面基本上共面的上表面。A ring magnet having an upper surface substantially coplanar with the upper surface of the cylindrical magnet.2.根据权利要求1的磁性拆卸器，其中，所述环形磁体被径向地磁化。2. The magnetic detacher of claim 1, wherein the ring magnet is radially magnetized.3.根据权利要求1的磁性拆卸器，其中，所述环形磁体包括多个部分。3. The magnetic detacher of claim 1, wherein said ring magnet comprises a plurality of sections.4.根据权利要求3的磁性拆卸器，其中，所述多个部分的每个在指向所述环形磁体的中心的方向上被磁化。4. The magnetic detacher of claim 3, wherein each of the plurality of portions is magnetized in a direction toward the center of the ring magnet.5.根据权利要求3的磁性拆卸器，包括四个或者更多的部分。5. The magnetic detacher of claim 3, comprising four or more sections.6.根据权利要求1的磁性拆卸器，其中，由所述环形磁体产生的磁通被向所述环形磁体的中心向内引导，并且向上弯曲出所述环形磁体。6. The magnetic detacher of claim 1, wherein the magnetic flux generated by the ring magnet is directed inward toward the center of the ring magnet and bends upward out of the ring magnet.7.根据权利要求1的磁性拆卸器，其中，由所述环形磁体产生的磁场加到由所述圆柱磁体产生的垂直指向的磁场。7. The magnetic detacher of claim 1, wherein the magnetic field generated by the ring magnet is added to the vertically directed magnetic field generated by the cylindrical magnet.8.根据权利要求1的磁性拆卸器，其中，所述磁性组件提供围绕所述磁性组件的轴相对对称的径向磁场。8. The magnetic detacher of claim 1, wherein said magnetic assembly provides a relatively symmetrical radial magnetic field about an axis of said magnetic assembly.9.根据权利要求1的磁性拆卸器，还包括位于所述磁性组件的底部的软铁材料，用于增强磁场。9. The magnetic detacher of claim 1, further comprising a soft iron material at the bottom of the magnetic assembly for enhancing the magnetic field.10.根据权利要求1的磁性拆卸器，其中，所述磁性组件包括一个或多个永磁体。10. The magnetic detacher of claim 1, wherein the magnetic assembly comprises one or more permanent magnets.11.根据权利要求10的磁性拆卸器，其中，所述一个或多个永磁体包括下述的至少一个：NdFeB磁体、硬铁氧体磁体、SmCo磁体和AlNiCo磁体。11. The magnetic detacher of claim 10, wherein the one or more permanent magnets comprise at least one of the following: a NdFeB magnet, a hard ferrite magnet, a SmCo magnet, and an AlNiCo magnet.12.根据权利要求1的磁性拆卸器，其中，所述环形磁体包括大于或者等于10毫米的高度尺寸。12. The magnetic detacher of claim 1, wherein the ring magnet includes a height dimension greater than or equal to 10 millimeters.13.根据权利要求1的磁性拆卸器，其中，所述环形磁体包括大于或者等于44毫米的外径尺寸。13. The magnetic detacher of claim 1, wherein the ring magnet comprises an outer diameter dimension greater than or equal to 44 millimeters.14.根据权利要求1的磁性拆卸器，其中，所述磁性组件提供增强的磁场投影。14. The magnetic detacher of claim 1, wherein the magnetic assembly provides enhanced magnetic field projection.

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