CN101751588B - Theft-proof label used in sound-magnetic electronic article monitoring system - Google Patents
Theft-proof label used in sound-magnetic electronic article monitoring system Download PDFInfo
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- CN101751588B CN101751588B CN2009101553665A CN200910155366A CN101751588B CN 101751588 B CN101751588 B CN 101751588B CN 2009101553665 A CN2009101553665 A CN 2009101553665A CN 200910155366 A CN200910155366 A CN 200910155366A CN 101751588 B CN101751588 B CN 101751588B
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Abstract
The invention provides a theft-proof label used in a sound-magnetic electronic article monitoring system, which comprises a box body, wherein an amorphous resonance sheet and a bias magnetic sheet are arranged in the box body, and the bias magnetic sheet is made from carbon steel; and the bias magnetic field strength of the bias magnetic sheet is more than or equal to 2.5Oe and is less than or equal to 4Oe, and the size of length, width and thickness is between 30 x 4 x 0.05mm and 32 x 6 x 0.1mm. The invention breaks through the traditional design idea of the anti-theft label, uses non-rectangular magnetic carbon steel as the bias magnetic sheet, and combines and uses the carbon steel as the bias magnetic sheet so as to enable the various parameters of the theft-proof label to meet use requirements by reducing the bias magnetic field strength to 2.5 to 4Oe; in addition, the carbon steel needs not to be subject to heat treatment and can be used as a material of the bias magnetic sheet by direct cold rolling, thereby significantly reducing the cost of the anti-theft label.
Description
Technical field
The present invention relates to be used in the anti-theft tag in the sound-magnetic electronic article monitoring system.
Background technology
Anti-theft tag is the identity device that is applied in the electronic article monitoring system, thereby it can and be configured in whether the band that produces the indication article that interact between the electromagnetic field in kinds of goods exit is legal from behavior.Can to reuse be the difference standard; Anti-theft tag has the branch of soft label and hard label; Hard label is because of demagnetization repeatedly-magnetize and can reuse, but its manufacturing cost, maintenance cost is higher, volume is bigger, and the application of selling the place at present in supermarket and other items is substituted by soft label gradually.Soft label is a kind of disposable identity device, and it contains amorphous resonance plate and bias element, when goods is sold, bias element by pin magnetic after, this label is ineffective and can not restores.For the manufacturing and design of soft label, present general knowledge is that to guarantee the stability of label, therefore, the bias magnetic field field intensity of present soft label is higher as long as material can realize that the bias magnetic field of its bias element should be the bigger the better, generally all >=and 8Oe.Higher bias magnetic field requirement is complicated with the Technology for Heating Processing of the amorphous resonance plate of its coupling, can not adopt conventional Technology for Heating Processing.And; For guaranteeing under high bias magnetic field operate as normal and guaranteeing the relatively stable of label frequency of operation; It is had relatively high expectations to the biasing magnetic sheet that bias magnetic field is provided; Require (1) its to have >=coercive force of 25Oe, (2) its magnetic hysteresis loop will have the rectangular curve characteristic, to guarantee the stability of its remanent magnetism.Like this, the biasing magnetic sheet need adopt expensive alloy materials such as iron, nickel, chromium, cobalt, such as; FeNiTi, FeCrCoNi, FeMn, FeNiMo, FeCu, FrCrCo, FrCr, FeCoV, FCrCo, FeNi etc., and, in process, must adopt and require very high annealing heat treatment mode; Direct current remanent magnetism with the coercive force that reaches desired biasing magnetic sheet and consistance thereof, biasing magnetic sheet; With the satisfied requirement that generates in enormous quantities, yet so high requirement has caused yield rate extremely low; Add the costliness of selected materials, the complicacy of treatment process; Make that the cost of present soft label is higher, deviated from design, used the original intention of soft label, increased extra cost for the manufacturer of soft label that uses in enormous quantities.
Summary of the invention
Technical matters to be solved by this invention provides a kind of anti-theft tag that is used in the sound-magnetic electronic article monitoring system, and it can greatly reduce manufacturing cost.For this reason; The present invention adopts following technical scheme: it comprises box body; Be provided with amorphous resonance plate, biasing magnetic sheet in the box body; The used material of said biasing magnetic sheet is a carbon steel, the biased magnetic field strength of said biasing magnetic sheet more than or equal to 2.5Oe smaller or equal to 4Oe, the thick size of length and width at 30*4*0.05mm between the 32*6*0.1mm.
As above said; As the biasing magnetic sheet in the anti-theft tag, because the stability of anti-theft tag depends on the constancy of bias magnetic field, so square magnetic is comparatively ideal material than high material; The remanent magnetism of this type material is not subject to the external magnetic field influence, and the bias magnetic field that is produced is relatively stable.But not the carbon steel of square magnetic receives the influence of external magnetic field very big, and remanent magnetism is easy to change, and is inappropriate in principle and makes the magnetic bias material.The present invention has broken through the traditional design thinking of anti-theft tag, acts in a diametrically opposite way, and the carbon steel that adopts non-square magnetic is as the magnetic bias sheet; Through a large amount of Theoretical Calculation and experiment, through biased magnetic field strength is reduced to 2.5-4Oe, in the case; In conjunction with adopting carbon steel can make the parameters of anti-theft tag satisfy request for utilization as the magnetic bias sheet; And carbon steel is cheap, steady quality, easily buying, and it needn't be through bakingout process; Direct cold rolling promptly can be used as the material of bias magnetic sheet, thereby can reduce the cost of anti-theft tag significantly.And; The thick size of its length and width can be at 30*4*0.05mm between the 32*6*0.1mm when carbon steel generation bias magnetic field was 2.5-4Oe; Just meeting the required optimum dimension coupling of anti-theft tag; Highly stable and uniform bias magnetic field can be provided, and can also reduce complicated requirement amorphous resonance plate Technology for Heating Processing.
Description of drawings
Fig. 1 is the explosive view of anti-theft tag provided by the present invention.
Fig. 2 is the performance diagram of embodiment product provided by the present invention under the environment of direct current demagnetization field.
Fig. 3 is the performance diagram under the AC demagnetization field environment of embodiment of the invention product.
The bias magnetization performance diagram of the amorphous resonance plate of Fig. 4 embodiment of the invention product.
Performance diagram when Fig. 5 embodiment of the invention product is adjusted paramount magnetic bias and required the amorphous resonance plate.
The map of the biased magnetic field strength that Fig. 6 different size carbon steel is produced.
The magnetic hysteresis loop figure of the bias magnetic sheet material of Fig. 7 embodiment of the invention product.
Fig. 8 is the magnetic hysteresis loop figure of square magnetic than the bias magnetic sheet material of high material.
Embodiment
With reference to accompanying drawing.Anti-theft tag provided by the present invention belongs to soft label; It comprises housing 1, is provided with two amorphous resonance plates 2 and a slice biasing magnetic sheet 3 in the housing 1, between amorphous resonance plate 2 and biasing magnetic sheet 3, is provided with composite membrane 4; Seal with adhesive sticker 5 in the housing bottom surface; The used material of said biasing magnetic sheet is a carbon steel, and smaller or equal to 4Oe, the length and width of biasing magnetic sheet are thick to be of a size of at 30*4*0.05mm to 32*6*0.1mm the biased magnetic field strength of said biasing magnetic sheet more than or equal to 2.5Oe.
In the present embodiment; The material of carbon steel can be selected the carbon steel of label T10, T10A, SK4 or SK5 for use, and Fig. 2,3 is respectively direct current demagnetization curve map and the AC demagnetization curve map of SK4, and the direct current demagnetization curve map and the AC demagnetization curve map of its excess-three kind material are similar with it; Wherein, SK4 and T10A impurity still less, material is rolling should not to ftracture when thinner, is preferable material.Can find out from this figure: product of the present invention can store in or place external magnetic field by force up to the environment of 8 oersteds, properties of product are stable, and are unaffected.Simultaneously can see that also product of the present invention is easy to demagnetization and deactivation,, meet the requirement of anti-theft tag applied environment fully when demagnetizing field reaches 20 these above product deactivations fully difficult to understand.
Through Fig. 4 and Fig. 5 contrast; Two kinds of situation during the low bias magnetic field that can be clear that the embodiment of the invention adopts and during high bias magnetic field; The bias magnetic field scope that needs during optimum matching when adopting high bias magnetic field is 5.5-6Oe, and the bias magnetic field that needs during optimum matching when adopting low bias magnetic field is 2.5-3.5Oe.Because the remanent magnetism of the carbon steel of non-square magnetic receives external environment influence to be easy to change, just produce bias magnetic field and be prone to change.When remanent magnetism reduced by 20%, the bias field that is produced can be reduced to 4.8Oe by 6Oe, had deflected away from optimum matching point fully, mismatch fully even, cisco unity malfunction.And low bias magnetic field is when wanting, and remanent magnetism reduces by 20%, and the biased magnetic field strength of generation can be reduced to 2.8Oe by 3.5Oe; Still meet the demand of optimum matching field, properties of product are normal, therefore; The remanent magnetism of considering the carbon steel of non-square magnetic receives external environment influence this factor that is easy to change; Biasing magnetic sheet of the present invention biased magnetic field strength initial range during fabrication be more than or equal to 3.2Oe smaller or equal to 4Oe, behind the finished product, its stable bias magnetic field is between 2.5-3.5Oe.
Be of a size of optimum matching at 30*4*0.05mm during to 32*6*0.1mm by Distribution of Magnetic Field simulation calculation obtain the setovering size of magnetic sheet, the homogeneity of the bias magnetic field that is produced is more satisfactory.Can be clear that through Fig. 6 the bias field that when being of a size of 30*4*0.06mm, produces is just in the 2.5-3.5Oe scope.
Fig. 7 is the magnetic hysteresis loop figure of the bias magnetic sheet material carbon steel of embodiment of the invention product, and Fig. 8 is the magnetic hysteresis loop figure of square magnetic than high half-hard magnetic material.Can see that with reference to figure the nonlinearities change of square magnetic half-hard magnetic material is very strong through two, in demagnetizing field intensity during less than the coercive force scope, the remanent magnetism substantially constant; Change very little; Be commonly considered as the comparatively ideal material of magnetic bias material, and the bias magnetic sheet material carbon steel of present embodiment product generally is considered to be not suitable as the bias magnetic sheet material of anti-theft tag owing to be non-rectangular hysteresis material; Yet through research of the present invention; Under specific magnetic field intensity, carbon steel still can show the effect that similar rectangular hysteresis material can reach, and cost is lower.
Claims (2)
1. anti-theft tag that is used in the sound-magnetic electronic article monitoring system; Comprise box body; Be provided with amorphous resonance plate, biasing magnetic sheet in the box body; It is characterized in that the used material of said biasing magnetic sheet is a carbon steel, the biased magnetic field strength of said biasing magnetic sheet more than or equal to 2.5Oe smaller or equal to 4Oe, the thick size of length and width at 30*4*0.05mm between the 32*6*0.1mm.
2. a kind of anti-theft tag that is used in the sound-magnetic electronic article monitoring system as claimed in claim 1, the biased magnetic field strength that it is characterized in that said biasing magnetic sheet more than or equal to 2.5Oe smaller or equal to 3.5Oe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101553665A CN101751588B (en) | 2009-12-21 | 2009-12-21 | Theft-proof label used in sound-magnetic electronic article monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101553665A CN101751588B (en) | 2009-12-21 | 2009-12-21 | Theft-proof label used in sound-magnetic electronic article monitoring system |
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| CN101751588A CN101751588A (en) | 2010-06-23 |
| CN101751588B true CN101751588B (en) | 2012-05-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136059B (en) * | 2011-03-03 | 2012-07-04 | 苏州市慧视通讯科技有限公司 | Video- analysis-base smoke detecting method |
| CN102298815B (en) * | 2011-05-20 | 2014-03-12 | 宁波讯强电子科技有限公司 | High coercive force offset sheet, manufacturing method thereof and acoustic magnetic anti-theft label manufactured by utilizing same |
| CN103903510A (en) * | 2012-12-29 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Acoustic magnetic label |
| CN103996351B (en) * | 2013-02-20 | 2020-01-21 | 泰科消防及安全有限公司 | Adhesive bonded article protection label |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044937C (en) * | 1991-01-04 | 1999-09-01 | 科学类属有限公司 | Remotely readable data storage devices and apparatus |
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2009
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044937C (en) * | 1991-01-04 | 1999-09-01 | 科学类属有限公司 | Remotely readable data storage devices and apparatus |
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| CN101751588A (en) | 2010-06-23 |
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Address after: Hangzhou City, Zhejiang province 310015 Shangcheng District Moganshan Road No. 1418-25 city science and Technology Park Patentee after: CENTURY TECHNOLOGY CO., LTD. Patentee after: Hangzhou Century Co., Ltd. Address before: Hangzhou City, Zhejiang province 310015 Shangcheng District Moganshan Road No. 1418-25 city science and Technology Park Patentee before: Hangzhou Century Co., Ltd. Patentee before: Hangzhou Century Co., Ltd. |
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