CN103729961A - Acoustic-magnetic anti-theft label - Google Patents
Acoustic-magnetic anti-theft label Download PDFInfo
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- CN103729961A CN103729961A CN201410030783.8A CN201410030783A CN103729961A CN 103729961 A CN103729961 A CN 103729961A CN 201410030783 A CN201410030783 A CN 201410030783A CN 103729961 A CN103729961 A CN 103729961A
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Abstract
The invention relates to an acoustic-magnetic anti-theft label which comprises a magnetic biasing piece and a box body provided with a cavity. At least one resonance piece is arranged in the cavity of the box body and is of a piece-shaped structure, and the magnetic biasing piece comprises a hard magnetic material biasing piece and a soft magnetic material biasing piece. Due to the fact that a hard magnetic material and a soft magnetic material are adopted to form a magnetic circuit, the acoustic-magnetic anti-theft label has the advantages of having a bias magnetic field and being adjustable in size, good in directionality and the like, and is simple in structure, reasonable in design, low in raw material cost, convenient to process. A manufacturing process is simple, the production cost is reduced, and the acoustic-magnetic anti-theft label has wide market prospect.
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 the compounded acoustic magnetic anti-theft label of soft magnetism.
Background technology
Sound magnetic system mainly comprises detector, demoder, the antitheft target of sound magnetic etc.The current antitheft target of sound magnetic can be divided into two kinds: sound magnetic theft-prevention clamp and acoustic magnetic anti-theft label, and both all use amorphous ribbon as resonance plate, and magnetic material is as bias slice.Existing acoustic magnetic anti-theft label mostly adopts half-hard magnetic material, and direct current coercive force is between 10000A/m (125 oersted) and 1000A/m(l2.5 oersted) between magnetic material, as bias slice.US Patent No. 6359563 discloses a kind of audio magnetic label, comprise a long and narrow plastic box body and lid lid thereon, lid is formed by stacking by bias slice and the epiphragma of epiphragma, double faced adhesive tape, half-hard magnetic material from top to bottom successively, in the cavity of box body, place the resonance plate of more than a slice or a slice big or small and the mutual stack that box body matches, the horizontal archwise of resonance plate, wherein bias slice is parallelogram or the parallelogram of chamfering.Due to half-hard magnetic material complex manufacturing, expensive, and be difficult for obtaining, cause manufacturing bias slice cost with half-hard magnetic material high.
Also occurred in recent years using separately direct current coercive force to be greater than the hard magnetic off-set piece of 10000A/m (125 oersted), or direct current coercive force is less than 1000A/m(l2.5 oersted separately) soft magnetic material, as the acoustic magnetic anti-theft label of bias slice.For example, notification number is the anti-theft audio magnetic label > > that the Chinese patent < < of CN201149717Y adopts hard magnetic off-set piece, and the manufacture method of the publication No. Chinese patent < < soft magnetic material bias slice that is CN1885446A and use the anti-theft audio magnetic label > > of this bias slice to disclose respectively the anti-theft audio magnetic label of hard magnetic off-set piece and the anti-theft audio magnetic label that bias slice is soft magnetic material.Use this class acoustic magnetic anti-theft label of half Hard Magnetic or soft magnetism bias slice repeatedly to decode and to activate, the acoustic magnetic anti-theft label on the commodity after payment, by the demoder decoding of demagnetizing, does not trigger the alarm on doorway when commodity leave market like this.But, use separately the acoustic magnetic anti-theft label of hard magnetic off-set piece to be difficult to demagnetization decoding, and use the acoustic magnetic anti-theft label of soft magnetism bias slice, be easily subject to the impacts such as terrestrial magnetic field and slowly demagnetization, thereby affect its serviceable life.
For these reasons, for quality and the life-span guaranteeing, those skilled in the art start with from changing the technique of half-hard magnetic material conventionally, in the hope of reducing costs, Chinese patent < < half-hard magnetic material, the preparation method and its usage > > that for example publication No. is CN101882492A discloses and a kind ofly can improve yield rate, the half-hard magnetic material preparation method who reduces costs.
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 invention provides a kind of cost low, resonant frequency is stable, with the acoustic magnetic anti-theft label of soft magnetic material and hard magnetic material composite manufacturing bias slice.
The technical solution adopted for the present invention to solve the technical problems is: a kind of acoustic magnetic anti-theft label, comprise magnetic bias sheet and with the box body of 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 material bias slice, described resonance plate is schistose texture, and is at least a slice.Described magnetic bias sheet, due to the soft magnetic material adopting and hard magnetic material formation magnetic circuit, has bias magnetic field, big or small adjustable, the advantages such as good directionality.The material of resonance plate is identical with the resonance plate material that existing acoustic magnetic anti-theft label adopts, and is generally non-crystalline material.
Have a slice soft magnetic material bias slice and two identical hard magnetic material bias slices, described soft magnetic material bias slice is rectangle, in the middle of being placed in; Described hard magnetic material bias slice is arranged on the both sides on the length direction of described soft magnetic material bias slice, and is centrosymmetric with respect to described soft magnetic material bias slice; Described hard magnetic material bias slice and described soft magnetic material bias slice are positioned at same plane.
Described hard magnetic material bias slice is circle or rectangle.Hard magnetic material bias slice can be processed into circle or rectangle, and soft magnetic material bias slice is processed into rectangle, and the length of soft magnetic material bias slice and width regulate according to the resonance plate size of coupling.
The width of the diameter of described hard magnetic material bias slice≤described soft magnetic material bias slice.The size of soft magnetic material bias slice is larger, and the field intensity that can produce is stronger, and itself and resonance plate match, and has determined the Oscillation Amplitude of resonance plate, and the Oscillation Amplitude of resonance plate is large, to the coherence request of two hard magnetic material bias slices, will reduce.A kind of preferred scheme is, hard magnetic material bias slice is the circle of diameter 1mm～6mm, and thickness is 0.01mm～0.03mm; Soft magnetic material bias slice is rectangle, and width is 4mm～6mm, and length is 20mm～35mm, and thickness is 0.04mm～0.06mm; Bee-line between hard magnetic material bias slice and soft magnetic material bias slice is 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 separately positioned on the both sides of described soft magnetic material bias slice along the central axis of the length direction of described soft magnetic material bias slice.
Described hard magnetic material bias slice is separately positioned on the both sides of described soft magnetic material bias slice along the diagonal line of described soft magnetic material bias slice.
Coercive force Hc >=the 100Oe of described hard magnetic material bias slice, residual magnetic flux density Br is 0.1T～0.9T.
Described magnetic bias sheet is arranged in the cavity of box body, and be positioned at resonance plate above or below.The position of magnetic bias sheet relative resonance plate in the cavity of box body does 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, is provided with epiphragma.Between magnetic bias sheet and resonance plate, epiphragma is set both are separated, make the clamping action of magnetic bias sheet and resonance plate little.
Described lid is comprised of upper epiphragma and double faced adhesive tape.
Described resonance plate is rectangle.Soft magnetic material bias slice and resonance plate also can manufacture other shapes, and still working as soft magnetic material bias slice and resonance plate is straight rectangle, and it is more simple, convenient to manufacture, and greatly reduces production cost.
On described box body, be stamped lid, described lid is comprised 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 adopts soft magnetic material and hard magnetic material is compound makes, and raw materials cost is low, easy to process; Manufacturing process is simple, has reduced production cost, has wide market outlook.
Accompanying drawing explanation
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 sectional view 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 sectional view 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 sectional view 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 sectional view 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 sectional view of embodiment 6.
In figure 1, hard magnetic material bias slice, 2, soft magnetic material bias slice, 3, resonance plate, 4, box body, 5, cavity, 6, upper epiphragma, 7, double faced adhesive tape, 8, epiphragma.
Embodiment
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, so it only show the formation relevant with the present invention.
As shown in Figure 1 and Figure 2, a kind of acoustic magnetic anti-theft label of the present embodiment, comprises magnetic bias sheet and with the box body 4 of cavity 5, on box body 4, is stamped lid, lid is comprised 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, and magnetic bias sheet comprises hard magnetic material bias slice 1 and soft magnetic material bias slice 2, and resonance plate 3 is straight schistose texture.Hard magnetic material bias slice 1 is circular, and soft magnetic material bias slice 2 and resonance plate 3 are rectangle.
Described soft magnetic material bias slice 2 is rectangle, in the middle of being placed in; Described hard magnetic material bias slice 1 is circular, is arranged on along the central axis of the length direction of described soft magnetic material bias slice 2 and is separately positioned on the both sides of described soft magnetic material bias slice 2, and be centrosymmetric with respect to described soft magnetic material bias slice 2; Described hard magnetic material bias slice 1 and described soft magnetic material bias slice 2 are positioned at same plane.The relative position of hard magnetic material bias slice 1 and soft 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; The width of described soft magnetic material bias slice 2 is 6mm, and length is 20mm, and thickness is 0.06mm; Bee-line between hard magnetic material bias slice 1 and soft magnetic material bias slice 2 is 1mm; Resonance plate is FeNiMoB amorphous alloy material, and width is 6mm, and length is 20mm, and 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 material bias slice 2 are arranged in the cavity 5 of box body 4, and are positioned at the below of resonance plate 3.
As shown in Figure 3, Figure 4, the present embodiment is substantially the same manner as Example 1, and difference is, resonance plate 3 is two, and overlaps successively; Hard magnetic material bias slice 1 and soft magnetic material bias slice 2 are arranged on the lid outside the cavity 5 of box body 4.Between magnetic bias sheet and resonance plate 3, be provided with epiphragma 8.The diameter of described hard magnetic material bias slice 1 is 1mm, and thickness is 0.03mm; The width of described soft magnetic material bias slice 2 is 4mm, and length is 35mm, and thickness is 0.04mm; Bee-line between hard magnetic material bias slice 1 and soft magnetic material bias slice 2 is 10mm; The width of resonance plate is 6mm, and length is 30mm, and thickness is 0.06mm.The coercive force Hc=115Oe of hard magnetic material bias slice 1, residual magnetic flux density Br is 0.9T.
As shown in Figure 5, Figure 6, the present embodiment is substantially the same manner as Example 1, and difference is, hard magnetic material bias slice 1 and soft magnetic material bias slice 2 are arranged in the cavity 5 of box body 4, and are 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; The width of described soft magnetic material bias slice 2 is 4.5mm, and length is 28mm, and thickness is 0.04mm; Bee-line between hard magnetic material bias slice 1 and soft magnetic material bias slice 2 is 7mm; The width of resonance plate is 4.5mm, and length is 35mm, and thickness is 0.05mm.The coercive force Hc=150Oe of hard magnetic material bias slice 1, residual magnetic flux density Br is 0.3T.
As shown in Figure 7, Figure 8, the present embodiment is substantially the same manner as Example 1, and difference is, described hard magnetic material bias slice 1 is rectangle.The diameter of described hard magnetic material bias slice 1 is 3mm, and thickness is 0.03mm; The width of described soft magnetic material bias slice 2 is 4mm, and length is 28mm, and thickness is 0.04mm; Bee-line between hard magnetic material bias slice 1 and soft magnetic material bias slice 2 is 7mm; The width of resonance plate is 4mm, and length is 28mm, and thickness is 0.05mm.The coercive force Hc=120Oe of hard magnetic material bias slice 1, residual magnetic flux density Br is 0.5T.
The present embodiment is substantially the same manner as Example 1, and difference is, the width of the diameter of described hard magnetic material bias slice 1 and described soft magnetic material bias slice 2 is 6mm.
As shown in Fig. 9-11, the present embodiment is substantially the same manner as Example 1, and difference is, described hard magnetic material bias slice 1 is separately positioned on the both sides of described soft magnetic material bias slice 2 along the diagonal line of described soft magnetic material bias slice 2.
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 out sensitivity 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, test result is as table 1.
3, the label of various embodiments of the present invention can be demagnetized by same commercial demoder, first adopt commercial demoder demagnetization, detect the distance being detected on audio magnetic label demagnetization state verifier surface after the label demagnetization of each embodiment, measured distance is all 0cm again.
Above-described label detector and detection door are all that brand is HIGHLITH, the supermarket sound magnetic detector that model is AM002; Commercial demoder is Slimpad demoder and the RapidPad demoder of Sensormatic company; Audio magnetic label demagnetization state verifier is the double checker of Sensormatic company.Table 1
Claims (10)
1. an acoustic magnetic anti-theft label, comprise magnetic bias sheet and with the box body (4) of 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 material bias slice (2), described resonance plate (3) is schistose texture, and is at least a slice.
2. acoustic magnetic anti-theft label as claimed in claim 1, is characterized in that: have a slice soft magnetic material bias slice (2) and two identical hard magnetic material bias slices (1), described soft magnetic material 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 material bias slice (2), and is centrosymmetric with respect to described soft magnetic material bias slice (2); Described hard magnetic material bias slice (1) and described soft magnetic material bias slice (2) are positioned at same plane.
3. acoustic magnetic anti-theft label as claimed in claim 2, is characterized in that: described hard magnetic material bias slice (1) is circle or rectangle.
4. acoustic magnetic anti-theft label as claimed in claim 3, is characterized in that: the width of the diameter of described hard magnetic material bias slice (1)≤described soft magnetic material bias slice (2).
5. acoustic magnetic anti-theft label as claimed in claim 2, is characterized in that: described hard magnetic material bias slice (1) is separately positioned on the both sides of described soft magnetic material bias slice (2) along the central axis of the length direction of described soft magnetic material bias slice (2).
6. acoustic magnetic anti-theft label as claimed in claim 2, is characterized in that: described hard magnetic material bias slice (1) is separately positioned on the both sides of described soft magnetic material bias slice (2) along the diagonal line of described soft magnetic material bias slice (2).
7. 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.
8. 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.
9. 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).
10. acoustic magnetic anti-theft label as claimed in claim 9, is characterized in that: described lid is comprised 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 |
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| CN201410030783.8A CN103729961B (en) | 2014-01-22 | 2014-01-22 | Acoustic magnetic anti-theft label |
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| CN103729961A true CN103729961A (en) | 2014-04-16 |
| CN103729961B CN103729961B (en) | 2016-05-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106575463A (en) * | 2014-06-09 | 2017-04-19 | 泰科消防及安全有限公司 | Acoustic-magnetomechanical marker having an enhanced signal amplitude and the manufacture thereof |
| CN108564754A (en) * | 2018-06-15 | 2018-09-21 | 宁波讯强电子科技有限公司 | A kind of acoustic magnetic anti-theft label and its bias slice |
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| 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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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 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106575463A (en) * | 2014-06-09 | 2017-04-19 | 泰科消防及安全有限公司 | Acoustic-magnetomechanical marker having an enhanced signal amplitude and the manufacture thereof |
| CN106575463B (en) * | 2014-06-09 | 2019-08-20 | 泰科消防及安全有限公司 | Sound-magnetic force marker and its manufacturing method with enhancing signal amplitude |
| CN108564754A (en) * | 2018-06-15 | 2018-09-21 | 宁波讯强电子科技有限公司 | A kind of acoustic magnetic anti-theft label and its bias slice |
| 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 |
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| CN103729961B (en) | 2016-05-25 |
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