CN202183149U - Acoustic magnetic antitheft alarm member having asymmetric arranged bias member and acoustic magnetic antitheft clamp having the same - Google Patents
Acoustic magnetic antitheft alarm member having asymmetric arranged bias member and acoustic magnetic antitheft clamp having the same Download PDFInfo
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- CN202183149U CN202183149U CN2011202967904U CN201120296790U CN202183149U CN 202183149 U CN202183149 U CN 202183149U CN 2011202967904 U CN2011202967904 U CN 2011202967904U CN 201120296790 U CN201120296790 U CN 201120296790U CN 202183149 U CN202183149 U CN 202183149U
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- box body
- permanent magnet
- sound magnetic
- burglar alarm
- resonance
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Abstract
Disclosed are an acoustic magnetic antitheft alarm member having asymmetric arranged bias member and an acoustic magnetic antitheft clamp having the same, aiming at solving the problem that the resonance sheets wholly and symmetrically tilt to one side of the bias member due to the symmetry of corresponding position of the bias member and the resonance sheets with the prior art which decreases the intensity of the output signals amid label resonance. The acoustic magnetic antitheft alarm member of the utility model comprises a box body, a bias member, resonance sheets, and a box cover, wherein the resonance sheets are installed in a cavity of the box body; the box cover covers the box body; the box cover and the resonances are arranged in an layered manner; the bias member comprises a permanent magnetism segment made of sintered rare earth permanent magnet; one end of the permanent magnetism segment is fixedly connected with a first ferromagnetic segment while the other end of the permanent magnet is fixedly connected with a second ferromagnetic segment, with both the two ferromagnetic segments made of ferromagnetic material; and the length of the first ferromagnetic segment is greater than that of the second ferromagnetic segment. The acoustic magnetic antitheft alarm member features a simple structure, thin thickness, low cost, convenient processing, rare demagnetization and shield, stable resonance frequency, and high intensity of the output signals in label resonance.
Description
Technical field
The utility model relates to commercial anti-theft protection warning device production technical field, particularly a kind of sound magnetic theft-prevention clamp that has the sound magnetic burglar alarm spare of asymmetric geometry biasing and contain this part.
Background technology
The sound magnetic technology has been widely used in burglary-resisting system; The sound magnetic system mainly comprises detector, demoder and verifier, anti-theft audio magnetic target etc.; The pulsating wave of detector emission certain frequency; Excite the anti-theft audio magnetic target of in search coverage, not decoding to make it produce very strong signal and detected the triggering alarm equipment alarm by detector at this frequency resonance.Present anti-theft audio magnetic target can be divided into two kinds: folder antitheft of sound magnetic and acoustic magnetic anti-theft label, and both all use amorphous ribbon as resonance plate, and the crystalline state magnetic material is a bias slice.
Widely used in the market sound magnetic theft-prevention clamp can reduce two kinds simply by (the getting nail) mode of unblanking: mechanical type (getting nail) theft-prevention clamp and magnetic (the getting nail) theft-prevention clamp of unblanking of unblanking.But the mode of unblanking of existing sound magnetic theft-prevention clamp (the SuperTag series as the U.S. money of U.S. elder generation news Sensormatic Electronics Corporation is produced is pressed from both sides and the UltraGator folder) must adopt non-magnetic machinery (contact) formula to unblank, because the high-intensity magnetic field that magnetic lockaid gun inner magnet is produced can damage the DOM of isotropy biasing member in the sound magnetic burglar alarm spare (comprising resonance plate and isotropy plastic cement ferrite permanent-magnet biasing member).That is to say; Because inhaling the magnetic field of the magnet (commonly used is rare-earth permanent magnet) of driving spring leaf in the magnetic unlocking apparatus can be up to 4000-6000 Gauss (Gs); And the biasing member employing of existing sound magnetic theft-prevention clamp (the SuperTag series as U.S. elder generation news U.S. money Sensormatic Electronic Corporation is produced is pressed from both sides and the UltraGator folder) is isotropy plastic cement ferrite permanent magnet; Its coercivity H is merely about about 2000-3000 oersted (Oe); So the high-intensity magnetic field remagnetize of very easy quilt mixed and disorderly bending direction departs from originally the DOM along resonance plate length to new direction; Thereby cause magnetic warning member to be reduced to not alarm condition, caused permanent damages sound magnetic theft-prevention clamp warning performance from activated state.Therefore, sound magnetic theft-prevention clamp can only adopt the mechanical unlocking device of no magnetic in the past.Compare with the non-contact type magnetic unlocking method; Mechanical unlocking device is complicated, and manufacturing cost is high, thus the very fragile high maintenance costs that causes of mechanical push rod head; Method for unlocking is that contact is not easy to the salesman and unblanks very much, these drawbacks limit the cost of sound magnetic theft-prevention clamp reduce and the market occupancy.Further, stealer still can be easily with a magnet just with the hard label permanent destruction of Supertag class, and the articles of price that will have a hard label of can not reporting to the police again of this inefficacy are stolen out the market.
The inventor has formerly invented a kind of biasing member with sintered rare-earth permanent magnetic and has been placed on the one-sided technical scheme of resonance plate (patent No. ZL200810062642.9), and greatly having solved sound magnetic permanent sticker needs very kicker magnet biasing but the strongly damped contradiction of pair resonance plate can not be arranged.But this method still has a little damping action because the symmetry of biasing member and resonance plate relative position makes resonance plate global symmetry ground be partial to biasing member one side.
Summary of the invention
The purpose of the utility model is to solve prior art because the symmetry of biasing member and resonance plate relative position; Make resonance plate global symmetry ground be partial to biasing member one side; The problem of output signal strength when having reduced tag resonates; A kind of simple in structure, thin thickness is provided; Cost is low, easy to process, be difficult to demagnetization, be difficult to conductively-closed, resonant frequency is stable, the high sound magnetic burglar alarm spare with asymmetric geometry biasing of output signal strength during tag resonates, and it both can be used for the sound magnetic theft-prevention clamp of taking nail by magnetic unlocking method, also can be used for the sound magnetic theft-prevention clamp that mechanical unlocking method is got nail.
Another purpose of the utility model is to provide a kind of sound magnetic theft-prevention clamp that the above-mentioned also available mechanical unlocking method of both available magnetic unlocking method with sound magnetic burglar alarm spare of asymmetric geometry biasing is got nail that is equipped with; Its stable performance, reliable; Have the performance that extremely strong anti-strong magnetic destroys, and the manufacture craft flow process is simple.
The utility model solves the technical scheme that its technical matters adopted: a kind of sound magnetic burglar alarm spare with asymmetric geometry biasing; Comprise box body, biasing member, resonance plate and lid; Resonance plate is enclosed in the cavity of box body; Lid covers on box body, and lid and resonance plate are layered arrangement, and described biasing member comprises the permanent magnet segments that the rare-earth permanent magnet of sintering is processed; Described permanent magnet segments two ends are fixed with first ferromagnetic section and second ferromagnetic section that is processed by ferromagnetic material respectively, and first ferromagnetic section length is greater than second ferromagnetic section length.
The utility model has further proposed the biasing member of asymmetric geometry, and what make that resonance plate experiences is asymmetric magnetic flux, makes a concerted effort to produce the damping to resonance the intensity of output signal when having improved tag resonates thereby can't form symmetry.The implementation of the biasing member of asymmetric geometry is to be provided with first ferromagnetic section and second ferromagnetic section respectively at the two ends of permanent magnet segments; First ferromagnetic section length is greater than second ferromagnetic section length; Such first ferromagnetic section and second ferromagnetic section are asymmetric with respect to permanent magnet segments, promptly can't find line of symmetry and symmetric points, and what make that resonance plate experiences is asymmetric magnetic flux; Make a concerted effort to produce damping the intensity of output signal when having improved tag resonates to resonance thereby can't form symmetry.Permanent magnet segments only is arranged on the one-sided of resonance plate; First ferromagnetic section and second ferromagnetic section can be rectilinear; Also can be the broken line shape that has bending along the side of resonance plate, as L shaped, preferred permanent magnet segments be positioned at the one-sided of resonance plate length direction; First ferromagnetic section is linearity and one-sided (being on the extended line of permanent magnet segments) that is positioned at the resonance plate length direction; Second ferromagnetic section L shaped (promptly along the extended line setting of permanent magnet segments, behind the corner that arrives resonance plate, transfer accordingly, asymmetrical like this effect is good).
As preferably, it is outer or be arranged in the box body or injection moulding is fixed in the box wall of box body that described biasing member is arranged on box body.Biasing member can be arranged on outside the box body, also can be arranged in the box, needs only the side at resonance plate, and it is less that the strength of resonance is influenced by biasing member, and signal intensity is bigger.The bias combination part also can be fixed in the box wall of box body in injection moulding.The direct injection moulding of biasing member is fixed in the box wall of box body, then when making box body, can fix biasing member simultaneously, has reduced manufacturing process flow.
As preferably, described biasing member is rod shape or strip, and the length of biasing member is more than 10 times of biasing member cross-sectional width.Biasing member integral body is rectilinear rod shape or strip, or has the rod shape or the list structure of bending.
As preferably, the rare-earth permanent magnet of described sintering is sintered Nd Fe B or Sm-Co rare earth permanent magnet.Nd-Fe-Bo permanent magnet material is the known the highest permanent magnetic material of magnetic energy product.Even stealer wants that destroying biasing member with a very strong NdFeB or Sm-Co rare earth permanent magnet (samarium-cobalt permanent magnet) can not succeed to reach the purpose of destroying this magnetic theft-prevention clamp.
As preferably, the coercivity H of the rare-earth permanent magnet of sintering >=8000 oersteds.Biasing member is combined by sintered rare-earth permanent magnetic body that contains coercivity H >=8000 oersteds and the ferrimagnet that does not contain rare earth.Biasing member can not demagnetized by high-intensity magnetic field, or remagnetize departs from original along the DOM of resonance plate length to new direction.
As preferably, described box body is a rectangular parallelepiped, and its opening edge is along being provided with flange; The lid size is complementary with box opening, and lid comprises epiphragma, and epiphragma lower surface edge is provided with double faced adhesive tape; The glue face position of double faced adhesive tape is corresponding to the box opening edge, and lid is fixing through double faced adhesive tape and box body bonding.Lid is slightly larger than the cavity size of box body, and its edge is stained with double faced adhesive tape and links together box body and epiphragma.Sound magnetic burglar alarm spare can integral body be presented in the magnetic theft-prevention clamp like this, and is very convenient, and sound magnetic burglar alarm spare also can use separately simultaneously, has widened usable range.Sound magnetic burglar alarm spare can certainly adopt alternate manner that lid and box body are fused, so that can integral body be presented in the magnetic theft-prevention clamp.
As preferably, described resonance plate quantity is at least 1.The resonance plate number is not limited to a slice, can make resonance signal intensity bigger as required.
As preferably, resonance plate quantity is 2 or 3.Can reach resonance effect preferably, the resonance amplitude is stronger.
A kind of magnetic theft-prevention clamp comprises upper clip, lower clamping piece, and the nail of upper clip and lower clamping piece locking is locked, and is provided with the intermediate plate cavity between upper clip and the lower clamping piece, and the sound magnetic burglar alarm spare with asymmetric geometry biasing is housed in the described intermediate plate cavity.
The beneficial effect of the utility model is: simple in structure, the thin thickness of the utility model sound magnetic burglar alarm spare; Cost is low, easy to process, be difficult to demagnetization, be difficult to conductively-closed, resonant frequency is stable, output signal strength is high during tag resonates; The utility model sound magnetic burglar alarm spare does not have and can be destroyed advantage by high-intensity magnetic field; The amplitude that resonates simultaneously is also unaffected; Do not improve the ability that its anti-strong magnetic deliberately destroys so be not only applicable to mechanical lock-opening style sound magnetic theft-prevention clamp, more be specially adapted to magnetic lock-opening style sound magnetic theft-prevention clamp.And the utility model various sound magnetic theft-prevention clamps of not only can packing into use as the warning piece of sound magnetic theft-prevention clamp, and can use as a kind of acoustic magnetic anti-theft label separately.
The sound magnetic theft-prevention clamp of the utility model, stable performance, reliable have outstanding anti-strong magnetic destructive characteristics, and the manufacture craft flow process is simple.
Description of drawings
Fig. 1 is a kind of decomposition texture synoptic diagram of the utility model;
Fig. 2 is that the utility model biasing member is arranged on the outer a kind of sectional view of box body;
Fig. 3 is that the utility model biasing member is arranged on a kind of sectional view in the box body;
Fig. 4 is the interior a kind of sectional view of box wall that the injection moulding of the utility model biasing member is fixed on box body;
Fig. 5 is the another kind of structural representation of the utility model;
Fig. 6 is unblank a kind of structural representation of magnetic theft-prevention clamp of mechanical type;
Fig. 7 is unblank a kind of structural representation of magnetic theft-prevention clamp of magnetic.
Among the figure: 1, box body, 11, cavity, 2, resonance plate, 3, lid, 31, double faced adhesive tape, 32, epiphragma, 4, biasing member, 41, permanent magnet segments, 42, first ferromagnetic section, 43, second ferromagnetic section, 5, sound magnetic burglar alarm spare, 6, upper clip, 7, lower clamping piece, 8, the nail lock.
Embodiment
Below through specific embodiment, and combine accompanying drawing, the technical scheme of the utility model is further specified.
Embodiment 1:
Like Fig. 1, a kind of sound magnetic burglar alarm spare shown in Figure 2 with asymmetric geometry biasing; Comprise box body 1, biasing member 4, resonance plate 2 and lid 3, resonance plate 2 has two, and resonance plate 2 is enclosed in the cavity 11 of box body 1; Lid 3 covers on box body 1, and lid 3 is layered arrangement with resonance plate 2.Described box body 1 is a rectangular parallelepiped; Its opening edge is along being provided with flange; Lid 3 sizes are complementary with box body 1 opening, and lid 3 comprises epiphragma 32, and epiphragma 32 lower surface edges are provided with double faced adhesive tape 31; The glue face position of double faced adhesive tape 31 is corresponding to box body 1 opening edge edge, and lid 3 is fixing with box body 1 bonding through double faced adhesive tape 31.Described biasing member 4 is arranged on outside the box body 1; Biasing member 4 is the rod shape, and biasing member 4 comprises the permanent magnet segments 41 that the rare-earth permanent magnet of sintering is processed, and permanent magnet segments 41 is positioned at a side of resonance plate 2 length directions; Described permanent magnet segments 41 two ends are connected with first ferromagnetic section 42 and second ferromagnetic section 43 that is processed by ferromagnetic material respectively; First ferromagnetic section 42 and second ferromagnetic section 43 is straight-line segment, and first ferromagnetic section 42 length is greater than second ferromagnetic section 43 length, and permanent magnet segments 41 is processed by the sintered Nd Fe B rare earth permanent magnet; Permanent magnet segments 41 is of a size of 0.8mm * 0.8mm * 2mm; Sintered Nd Fe B rare earth permanent magnet coercivity H >=8000 oersteds, so high coercive force can lose efficacy alarm by the strong magnetic magnetization of magnetic unlocking apparatus.First ferromagnetic section 42 and second ferromagnetic section 43 iron wire that is the 1mm diameter, first ferromagnetic section 42 length just can guide magnetic flux to an asymmetric position to be connected to resonance plate 2 greater than second ferromagnetic section 43 length like this.Sintered Nd Fe B rare earth permanent magnet biasing in the asymmetric biasing member 4 makes sound magnetic burglar alarm spare can't use any kicker magnet demagnetization.
Embodiment 2:
The difference of present embodiment and embodiment 1 is that biasing member 4 is arranged in the box body 1 (as shown in Figure 3), and biasing member 4 is a strip, and other is with embodiment 1.
Embodiment 3:
The difference of present embodiment and embodiment 1 is that biasing member 4 injection mouldings are fixed on the box wall interior (as shown in Figure 4) of box body 1, and other is with embodiment 1.
Embodiment 4:
The difference of present embodiment and embodiment 1 is that first ferromagnetic section 42 of biasing member 4 is L shaped bending segment (as shown in Figure 5), and second ferromagnetic section 43 is straight-line segment, and biasing member 4 is whole L-shaped, and other is with embodiment 1.
Embodiment 5:
A kind of available mechanical unlocking method is got the sound magnetic theft-prevention clamp (like Fig. 6) of nail; Comprise upper clip 6, lower clamping piece 7; And with the nail lock of upper clip 6 with lower clamping piece 7 lockings; Be provided with the intermediate plate cavity between upper clip 6 and the lower clamping piece 7, embodiment 1 described sound magnetic burglar alarm spare 5 with asymmetric geometry biasing is housed in the described intermediate plate cavity, through high-frequency welding upper clip 6 and lower clamping piece 7 peripheries are welded fully then; Nail lock 8 passes the commodity insertion lock core that will protect and can not extract, and the commodity that just can protect are one with sound magnetic theft-prevention clamp lock.
Embodiment 6:
A kind of sound magnetic theft-prevention clamp (like Fig. 7) of available taking nail by magnetic unlocking method comprises upper clip 6, lower clamping piece 7, and with the nail lock of upper clip 6 with lower clamping piece 7 lockings; Be provided with the intermediate plate cavity between upper clip 6 and the lower clamping piece 7; The described sound magnetic burglar alarm spares 5 with asymmetric geometry biasing of embodiment 4 are housed in the described intermediate plate cavity, through high-frequency welding upper clip 6 and lower clamping piece 7 peripheries are welded fully then, nail lock 8 passes the commodity that will protect and inserts lock core and can not extract; The commodity that just can protect are one with sound magnetic theft-prevention clamp lock; (have strong magnetic nail-fetching device to be placed on when below, lock core is opened, and nail lock 8 just can freely take out and makes commodity and magnetic theft-prevention clamp disengaging).Sound magnetic burglar alarm spare 5 when mounted not only can overall time be packed in the magnetic theft-prevention clamp, but also can wholely as required take out and change.
Above-described embodiment is a kind of preferable scheme of the utility model, is not the utility model is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Claims (9)
1. one kind has the sound magnetic burglar alarm spare that asymmetric geometry is setovered; Comprise box body (1), biasing member (4), resonance plate (2) and lid (3); Resonance plate (2) is enclosed in the cavity (11) of box body (1); Lid (3) covers on box body (1), and lid (3) and resonance plate (2) are layered arrangement, it is characterized in that: described biasing member (4) comprises the permanent magnet segments (41) that the rare-earth permanent magnet of sintering is processed; Described permanent magnet segments (41) two ends are fixed with first ferromagnetic section (42) and second ferromagnetic section (43) of being processed by ferromagnetic material respectively, and the length of first ferromagnetic section (42) is greater than the length of second ferromagnetic section (43).
2. the sound magnetic burglar alarm spare with asymmetric geometry biasing according to claim 1 is characterized in that: it is outer or be arranged in the box body (1) or injection moulding is fixed in the box wall of box body (1) that described biasing member (4) is arranged on box body (1).
3. the sound magnetic burglar alarm spare with asymmetric geometry biasing according to claim 1 and 2, it is characterized in that: described biasing member (4) is rod shape or strip, and the length of biasing member (4) is more than 10 times of biasing member cross-sectional width.
4. the sound magnetic burglar alarm spare with asymmetric geometry biasing according to claim 1 and 2, it is characterized in that: the rare-earth permanent magnet of described sintering is sintered Nd Fe B or Sm-Co rare earth permanent magnet.
5. the sound magnetic burglar alarm spare with asymmetric geometry biasing according to claim 3 is characterized in that: the coercivity H of the rare-earth permanent magnet of sintering >=8000 oersteds.
6. the sound magnetic burglar alarm spare with asymmetric geometry biasing according to claim 1 and 2; It is characterized in that: described box body (1) is a rectangular parallelepiped; Its opening edge is along being provided with flange; Lid (3) size is complementary with box body (1) opening, and lid (3) comprises epiphragma (32), and epiphragma (32) lower surface edge is provided with double faced adhesive tape (31); The glue face position of double faced adhesive tape (31) is corresponding to box body (1) opening edge edge, and lid (3) is fixing with box body (1) bonding through double faced adhesive tape (31).
7. the sound magnetic burglar alarm spare with asymmetric geometry biasing according to claim 1 and 2, it is characterized in that: described resonance plate (2) quantity is at least 1.
8. the sound magnetic burglar alarm spare with asymmetric geometry biasing according to claim 7, it is characterized in that: resonance plate (2) quantity is 2 or 3.
9. sound magnetic theft-prevention clamp; Comprise upper clip (6), lower clamping piece (7); Reach nail lock (8) with upper clip (6) and lower clamping piece (7) locking; Be provided with the intermediate plate cavity between upper clip (6) and the lower clamping piece (7), it is characterized in that: the sound magnetic burglar alarm spare (5) with asymmetric geometry biasing as claimed in claim 1 is housed in the described intermediate plate cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202967904U CN202183149U (en) | 2011-08-16 | 2011-08-16 | Acoustic magnetic antitheft alarm member having asymmetric arranged bias member and acoustic magnetic antitheft clamp having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202967904U CN202183149U (en) | 2011-08-16 | 2011-08-16 | Acoustic magnetic antitheft alarm member having asymmetric arranged bias member and acoustic magnetic antitheft clamp having the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202183149U true CN202183149U (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202967904U Expired - Lifetime CN202183149U (en) | 2011-08-16 | 2011-08-16 | Acoustic magnetic antitheft alarm member having asymmetric arranged bias member and acoustic magnetic antitheft clamp having the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202183149U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104603852A (en) * | 2012-05-22 | 2015-05-06 | 关卡系统股份有限公司 | Solid housing tag |
-
2011
- 2011-08-16 CN CN2011202967904U patent/CN202183149U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104603852A (en) * | 2012-05-22 | 2015-05-06 | 关卡系统股份有限公司 | Solid housing tag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120404 |
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| CX01 | Expiry of patent term |