CN103729961B - Acoustic magnetic anti-theft label - Google Patents
Acoustic magnetic anti-theft label Download PDFInfo
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- CN103729961B CN103729961B CN201410030783.8A CN201410030783A CN103729961B CN 103729961 B CN103729961 B CN 103729961B CN 201410030783 A CN201410030783 A CN 201410030783A CN 103729961 B CN103729961 B CN 103729961B
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Abstract
The present invention relates to a kind of acoustic magnetic anti-theft label, comprise magnetic bias sheet and the box body with cavity, in the cavity of described box body, be provided with resonance plate, described magnetic bias sheet comprises hard magnetic material bias slice and soft magnetic materials bias slice, described resonance plate is laminated structure, and is at least a slice. Described magnetic bias sheet, due to the soft magnetic materials adopting and hard magnetic material formation magnetic circuit, has bias magnetic field, big or small adjustable, the advantages such as good directionality; Simple in structure, reasonable in design; Cost of material is low, easy to process; Manufacturing process is simple, has reduced production cost, has wide market prospects.
Description
Technical field
The present invention relates to a kind of commercial burglar alarm, especially relate to a kind of bias slice and adopt Hard Magnetic and softThe compounded acoustic magnetic anti-theft label of magnetic.
Background technology
Sound magnetic system mainly comprises detector, decoder, the antitheft target of sound magnetic etc. The current antitheft target of sound magnetic canBe divided into two kinds: sound magnetic theft-prevention clamp and acoustic magnetic anti-theft label, both all use amorphous ribbon as resonance plate, magneticMaterial is as bias slice. Existing acoustic magnetic anti-theft label mostly adopts half-hard magnetic material, and direct current coercivity is situated betweenIn 10000A/m (125 oersted) and 1000A/m(l2.5 oersted) between magnetic material, as partiallyPut sheet. US Patent No. 6359563 discloses a kind of audio magnetic label, comprise a long and narrow plastic box body andLid thereon of lid, lid from top to bottom successively by the bias slice of epiphragma, double faced adhesive tape, half-hard magnetic material andEpiphragma is formed by stacking, and places mutually folded that the above size of a slice or a slice and box body match in the cavity of box bodyThe resonance plate adding, the horizontal archwise of resonance plate, wherein bias slice be parallelogram or chamfer parallel fourLimit shape. Due to half-hard magnetic material complex manufacturing, expensive, and be difficult for obtaining, cause using half Hard MagneticIt is high that material is manufactured bias slice cost.
Also occurred in recent years using separately direct current coercivity to be greater than the hard magnetic bias of 10000A/m (125 oersted)Sheet, or separately direct current coercivity is less than 1000A/m(l2.5 oersted) soft magnetic material, as partiallyPut the acoustic magnetic anti-theft label of sheet. For example, the Chinese patent that notification number is CN201149717Y " adopts Hard Magnetic inclined to one sidePut the anti-theft audio magnetic label of sheet ", and publication No. Chinese patent " the soft magnetic materials biasing that is CN1885446AThe manufacture method of sheet and use the anti-theft audio magnetic label of this bias slice " the antitheft of hard magnetic off-set piece disclosed respectivelyAudio magnetic label and bias slice are the anti-theft audio magnetic label of soft magnetic materials. Use half Hard Magnetic or soft magnetism bias sliceThis class acoustic magnetic anti-theft label can repeatedly be decoded and activate, and the acoustic magnetic anti-theft label on the commodity after payment passes throughThe decoder decoding of demagnetizing, does not trigger the alarm on doorway when commodity leave market like this. But, make separatelyBe difficult to demagnetization with the acoustic magnetic anti-theft label of hard magnetic off-set piece and decode, and use the sound magnetic of soft magnetism bias slice antitheftLabel, is easily subject to the impacts such as earth's magnetic field and slowly demagnetization, thereby affects its service life.
For these reasons, for the quality and the life-span that ensure, those skilled in the art are conventionally from changing semihardThe technique of magnetic material is started with, in the hope of reducing costs, and the Chinese patent " half that for example publication No. is CN101882492AHard magnetic material, preparation method and its usage " disclose one and can improve yield rate, the semihard reducing costsMagnetic material preparation method.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome the deficiency of existing acoustic magnetic anti-theft label, the present inventionProvide a kind of cost low, resonant frequency is stable, with the sound of soft magnetic materials and hard magnetic material composite manufacturing bias sliceMagnetic anti-theft label.
The technical solution adopted for the present invention to solve the technical problems is: a kind of acoustic magnetic anti-theft label, comprises magneticProperty bias slice and with the box body of cavity, is provided with resonance plate, described magnetic bias in the cavity of described box bodySheet comprises hard magnetic material bias slice and soft magnetic materials bias slice, and described resonance plate is laminated structure, and at leastFor a slice. Described magnetic bias sheet, due to the soft magnetic materials adopting and hard magnetic material formation magnetic circuit, has partiallyPut magnetic field, big or small adjustable, the advantages such as good directionality. The material of resonance plate and existing acoustic magnetic anti-theft label are adoptedWith resonance plate material identical, be generally non-crystalline material.
Have the hard magnetic material bias slice that a slice soft magnetic materials bias slice is identical with two, described soft magnetic materials is inclined to one sidePutting sheet is rectangle, in the middle of being placed in; Described hard magnetic material bias slice is arranged on the length of described soft magnetic materials bias sliceBoth sides in degree direction, and be centrosymmetric with respect to described soft magnetic materials bias slice; Described hard magnetic material is inclined to one sidePut sheet and described soft magnetic materials bias slice is positioned at same plane.
Described hard magnetic material bias slice is circle or rectangle. Hard magnetic material bias slice can be processed into circle orRectangle, soft magnetic materials bias slice is processed into rectangle, the length of soft magnetic materials bias slice and width according to couplingResonance plate size regulates.
The width of the diameter≤described soft magnetic materials bias slice of described hard magnetic material bias slice. Soft magnetic materials biasingThe size of sheet is larger, and the field intensity that can produce is stronger, and itself and resonance plate match, and has determined shaking of resonance plateMoving amplitude, the Oscillation Amplitude of resonance plate is large, will reduce the coherence request of two hard magnetic material bias slices.A kind of preferred scheme is, hard magnetic material bias slice is the circle of diameter 1mm～6mm, thickness be 0.01mm～0.03mm; Soft magnetic materials bias slice is rectangle, and width is 4mm～6mm, and length is 20mm～35mm, thicknessFor 0.04mm～0.06mm; Beeline between hard magnetic material bias slice and soft magnetic materials bias slice be 1mm～10mm; The width of resonance plate is 4mm～6mm, and length is 20mm～35mm, and thickness is 0.04mm～0.06mm.The resonant frequency of this tag activation state is 57-59kHz.
Described hard magnetic material bias slice is established respectively along the central axis of the length direction of described soft magnetic materials bias slicePut the both sides at described soft magnetic materials bias slice.
Described hard magnetic material bias slice is separately positioned on described soft magnetism along the diagonal of described soft magnetic materials bias sliceThe both sides of material bias slice.
Coercive force Hc >=the 100Oe of described hard magnetic material bias slice, residual magnetic flux density Br is0.1T～0.9T。
Described magnetic bias sheet is arranged in the cavity of box body, and be positioned at resonance plate above or below. MagneticProperty bias slice in the cavity of box body relatively the position of resonance plate do not affect warning effect.
On described box body, be stamped lid, described magnetic bias sheet is arranged on the lid below outside the cavity of box body,Between described magnetic bias sheet and resonance plate, be provided with epiphragma. Between magnetic bias sheet and resonance plate, epiphragma is setBoth are separated, make the clamping action of magnetic bias sheet and resonance plate little.
Described lid is made up of upper epiphragma and double faced adhesive tape.
Described resonance plate is rectangle. Soft magnetic materials bias slice and resonance plate also can manufacture other shapes, butBe when soft magnetic materials bias slice and resonance plate be straight rectangle, manufactures more simple, facilitate reduction greatlyProduction cost.
On described box body, be stamped lid, described lid is made up of upper epiphragma and double faced adhesive tape.
The beneficial effect of acoustic magnetic anti-theft label of the present invention is, simple in structure, reasonable in design; Bias slice adoptsSoft magnetic materials and hard magnetic material are compound to be made, and cost of material is low, easy to process; Manufacturing process is simple, has reducedProduction cost, has wide market prospects.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of acoustic magnetic anti-theft label embodiment 1 of the present invention.
Fig. 2 is the profile of embodiment 1.
Fig. 3 is the structural representation of acoustic magnetic anti-theft label embodiment 2 of the present invention.
Fig. 4 is the profile of embodiment 2.
Fig. 5 is the structural representation of acoustic magnetic anti-theft label embodiment 3 of the present invention.
Fig. 6 is the profile of embodiment 3.
Fig. 7 is the structural representation of acoustic magnetic anti-theft label embodiment 4 of the present invention.
Fig. 8 is the profile of embodiment 4.
Fig. 9 is the structural representation of acoustic magnetic anti-theft label embodiment 6 of the present invention.
Figure 10 is the partial top view of embodiment 6.
Figure 11 is the profile of embodiment 6.
In figure 1, hard magnetic material bias slice, 2, soft magnetic materials bias slice, 3, resonance plate, 4, box body, 5,Cavity, 6, upper epiphragma, 7, double faced adhesive tape, 8, epiphragma.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation. These accompanying drawings are the schematic diagram of simplification,Basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of acoustic magnetic anti-theft label of the present embodiment, comprise magnetic bias sheet and withThe box body 4 of cavity 5, is stamped lid on box body 4, and lid is made up of upper epiphragma 6 and double faced adhesive tape 7.
In the cavity 5 of box body 4, be provided with a slice resonance plate 3, magnetic bias sheet and resonance plate 3 are all layered arrangement,Magnetic bias sheet comprises hard magnetic material bias slice 1 and soft magnetic materials bias slice 2, and resonance plate 3 is straight sheetStructure. Hard magnetic material bias slice 1 is circular, and soft magnetic materials bias slice 2 and resonance plate 3 are rectangle.
Described soft magnetic materials bias slice 2 is rectangle, in the middle of being placed in; Described hard magnetic material bias slice 1 is circular,Be arranged on along the central axis of the length direction of described soft magnetic materials bias slice 2 and be separately positioned on described soft magnetism materialThe both sides of material bias slice 2, and be centrosymmetric with respect to described soft magnetic materials bias slice 2; Described Hard Magnetic materialMaterial bias slice 1 and described soft magnetic materials bias slice 2 are positioned at same plane. Hard magnetic material bias slice 1 and softThe relative position of magnetic material bias slice 2 can be fixed by double faced adhesive tape.
The diameter of described hard magnetic material bias slice 1 is 5mm, and thickness is 0.01mm; Described soft magnetic materials biasingThe width of sheet 2 is 6mm, and length is 20mm, and thickness is 0.06mm; Hard magnetic material bias slice 1 and soft magnetism materialBeeline between material bias slice 2 is 1mm; Resonance plate is FeNiMoB amorphous alloy material, and width is6mm, length is 20mm, thickness is 0.04mm. The coercive force Hc=100Oe of hard magnetic material bias slice 1,Residual magnetic flux density Br is 0.1T.
Hard magnetic material bias slice 1 and soft magnetic materials bias slice 2 are arranged in the cavity 5 of box body 4, and are positioned atThe below of resonance plate 3.
Embodiment 2
As shown in Figure 3, Figure 4, the present embodiment is substantially the same manner as Example 1, and difference is, resonance plate 3 isTwo, and overlap successively; Hard magnetic material bias slice 1 and soft magnetic materials bias slice 2 are arranged on box body 4Cavity 5 outside lid on. Between magnetic bias sheet and resonance plate 3, be provided with epiphragma 8. Described hard magnetic material is inclined to one sideThe diameter of putting sheet 1 is 1mm, and thickness is 0.03mm; The width of described soft magnetic materials bias slice 2 is 4mm, longDegree is 35mm, and thickness is 0.04mm; The shortest between hard magnetic material bias slice 1 and soft magnetic materials bias slice 2Distance is 10mm; The width of resonance plate is 6mm, and length is 30mm, and thickness is 0.06mm. Hard magnetic material is inclined to one sidePut the coercive force Hc=115Oe of sheet 1, residual magnetic flux density Br is 0.9T.
Embodiment 3
As shown in Figure 5, Figure 6, the present embodiment is substantially the same manner as Example 1, and difference is, hard magnetic material is inclined to one sidePut in the cavity 5 that sheet 1 and soft magnetic materials bias slice 2 be arranged on box body 4, and be positioned at the top of resonance plate 3.The diameter of described hard magnetic material bias slice 1 is 3mm, and thickness is 0.03mm; Described soft magnetic materials bias slice 2Width be 4.5mm, length is 28mm, thickness is 0.04mm; Hard magnetic material bias slice 1 and soft magnetic materialsBeeline between bias slice 2 is 7mm; The width of resonance plate is 4.5mm, and length is 35mm, and thickness is0.05mm. The coercive force Hc=150Oe of hard magnetic material bias slice 1, residual magnetic flux density Br is 0.3T.
Embodiment 4
As shown in Figure 7, Figure 8, the present embodiment is substantially the same manner as Example 1, and difference is, described Hard Magnetic materialMaterial bias slice 1 is rectangle. The diameter of described hard magnetic material bias slice 1 is 3mm, and thickness is 0.03mm; InstituteThe width of stating soft magnetic materials bias slice 2 is 4mm, and length is 28mm, and thickness is 0.04mm; Hard magnetic material is inclined to one sideThe beeline of putting between sheet 1 and soft magnetic materials bias slice 2 is 7mm; The width of resonance plate is 4mm, lengthFor 28mm, thickness is 0.05mm. The coercive force Hc=120Oe of hard magnetic material bias slice 1, residual magnetic inductionAnswering intensity Br is 0.5T.
Embodiment 5
The present embodiment is substantially the same manner as Example 1, and difference is, the diameter of described hard magnetic material bias slice 1Be 6mm with the width of described soft magnetic materials bias slice 2.
Embodiment 6
As shown in Fig. 9-11, the present embodiment is substantially the same manner as Example 1, and difference is, described hard magnetic materialBias slice 1 is separately positioned on described soft magnetic materials bias slice 2 along the diagonal of described soft magnetic materials bias slice 2Both sides.
Below the effect of each embodiment is carried out to description of test.
1, the sensitivity of tags detected: adopt the label detector, amplifier and the oscillograph that connect in turn to carry outSensitivity test, the sensitivity of each embodiment all >=15V, wherein, the sensitivity of embodiment 2 reaches 20V.
2, the detection range of detection door test: i.e. detectable maximum distance test between two detection doors, testResult is as table 1.
3, the label of various embodiments of the present invention can be demagnetized by same commercial decoder, first adopts commercial solutionCode device demagnetization, then detect after the label demagnetization of each embodiment detected on audio magnetic label demagnetization state verifier surfaceThe distance arriving, measured distance is all 0cm.
Above-described label detector and detection door are all that brand is HIGHLITH, and what model was AM002 is superBustling noise of a market magnetic detector; Commercial decoder is Slimpad decoder and the RapidPad of Sensormatic companyDecoder; Audio magnetic label demagnetization state verifier is the doublechecker of Sensormatic company.Table 1
Claims (7)
1. an acoustic magnetic anti-theft label, comprise magnetic bias sheet and the box body (4) with cavity (5), in the cavity (5) of described box body (4), be provided with resonance plate (3), it is characterized in that: described magnetic bias sheet comprises hard magnetic material bias slice (1) and soft magnetic materials bias slice (2), described resonance plate (3) is laminated structure, and is at least a slice;
Have the hard magnetic material bias slice (1) that a slice soft magnetic materials bias slice (2) is identical with two, described soft magnetic materials bias slice (2) is rectangle, in the middle of being placed in; Described hard magnetic material bias slice (1) is arranged on the both sides on the length direction of described soft magnetic materials bias slice (2), and is centrosymmetric with respect to described soft magnetic materials bias slice (2); Described hard magnetic material bias slice (1) and described soft magnetic materials bias slice (2) are positioned at same plane;
Described hard magnetic material bias slice (1) is circular, the width of the diameter≤described soft magnetic materials bias slice (2) of described hard magnetic material bias slice (1).
2. acoustic magnetic anti-theft label as claimed in claim 1, is characterized in that: described hard magnetic material bias slice (1) is separately positioned on the both sides of described soft magnetic materials bias slice (2) along the central axis of the length direction of described soft magnetic materials bias slice (2).
3. acoustic magnetic anti-theft label as claimed in claim 1, is characterized in that: described hard magnetic material bias slice (1) is separately positioned on the both sides of described soft magnetic materials bias slice (2) along the diagonal of described soft magnetic materials bias slice (2).
4. acoustic magnetic anti-theft label as claimed in claim 1, is characterized in that: the coercive force Hc >=100Oe of described hard magnetic material bias slice (1), residual magnetic flux density Br is 0.1T ~ 0.9T.
5. acoustic magnetic anti-theft label as claimed in claim 1, is characterized in that: described magnetic bias sheet is arranged in the cavity (5) of box body (4), and be positioned at resonance plate (3) above or below.
6. acoustic magnetic anti-theft label as claimed in claim 1, it is characterized in that: described box body is stamped lid on (4), described magnetic bias sheet is arranged on the outer lid below of cavity (5) of box body (4), between described magnetic bias sheet and resonance plate (3), is provided with epiphragma (8).
7. acoustic magnetic anti-theft label as claimed in claim 6, is characterized in that: described lid is made up of upper epiphragma (6) and double faced adhesive tape (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030783.8A CN103729961B (en) | 2014-01-22 | 2014-01-22 | Acoustic magnetic anti-theft label |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030783.8A CN103729961B (en) | 2014-01-22 | 2014-01-22 | Acoustic magnetic anti-theft label |
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| CN103729961A CN103729961A (en) | 2014-04-16 |
| CN103729961B true CN103729961B (en) | 2016-05-25 |
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| CN201410030783.8A Active CN103729961B (en) | 2014-01-22 | 2014-01-22 | Acoustic magnetic anti-theft label |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9275529B1 (en) * | 2014-06-09 | 2016-03-01 | Tyco Fire And Security Gmbh | Enhanced signal amplitude in acoustic-magnetomechanical EAS marker |
| CN108564754B (en) * | 2018-06-15 | 2024-06-04 | 宁波讯强电子科技有限公司 | Acoustic-magnetic anti-theft tag and offset sheet thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2428307B1 (en) * | 1978-06-05 | 1982-01-08 | Materiel Magnetique | |
| EP0446910A1 (en) * | 1990-03-13 | 1991-09-18 | Knogo Corporation | Theft detection apparatus and flattened wire target and method of making same |
| CN1885446A (en) * | 2006-06-16 | 2006-12-27 | 李霖 | Soft magnetic material offset piece manufacturing method and anti-theft acoustic magnetic label using the same |
| CN201149717Y (en) * | 2007-06-01 | 2008-11-12 | 李霖 | Anti-theft sound magnetic label using hard magnetic off-set piece |
| CN102129604A (en) * | 2011-03-24 | 2011-07-20 | 常州市科晶电子有限公司 | Elongated ultra-high-frequency induction label compounded from amorphous soft magnetic material |
| CN102592389A (en) * | 2011-09-13 | 2012-07-18 | 常州市科晶电子有限公司 | Anti-theft label adhered by rolling-up machine and label roll |
| CN203673605U (en) * | 2014-01-22 | 2014-06-25 | 常州市美思科特电子有限公司 | Acoustic magnetic anti-theft label |
-
2014
- 2014-01-22 CN CN201410030783.8A patent/CN103729961B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2428307B1 (en) * | 1978-06-05 | 1982-01-08 | Materiel Magnetique | |
| EP0446910A1 (en) * | 1990-03-13 | 1991-09-18 | Knogo Corporation | Theft detection apparatus and flattened wire target and method of making same |
| CN1885446A (en) * | 2006-06-16 | 2006-12-27 | 李霖 | Soft magnetic material offset piece manufacturing method and anti-theft acoustic magnetic label using the same |
| CN201149717Y (en) * | 2007-06-01 | 2008-11-12 | 李霖 | Anti-theft sound magnetic label using hard magnetic off-set piece |
| CN102129604A (en) * | 2011-03-24 | 2011-07-20 | 常州市科晶电子有限公司 | Elongated ultra-high-frequency induction label compounded from amorphous soft magnetic material |
| CN102592389A (en) * | 2011-09-13 | 2012-07-18 | 常州市科晶电子有限公司 | Anti-theft label adhered by rolling-up machine and label roll |
| CN203673605U (en) * | 2014-01-22 | 2014-06-25 | 常州市美思科特电子有限公司 | Acoustic magnetic anti-theft label |
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