CN201654934U - Commodity burglar alarm - Google Patents
Commodity burglar alarm Download PDFInfo
- Publication number
- CN201654934U CN201654934U CN2009201974439U CN200920197443U CN201654934U CN 201654934 U CN201654934 U CN 201654934U CN 2009201974439 U CN2009201974439 U CN 2009201974439U CN 200920197443 U CN200920197443 U CN 200920197443U CN 201654934 U CN201654934 U CN 201654934U
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- CN
- China
- Prior art keywords
- annular
- commodity anti
- theft apparatus
- commodity
- toroidal core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a commodity burglar alarm, which comprises a plastic outer casing. An annular LC oscillation antenna is arranged inside the commodity burglar alarm, and an annular magnetic core is arranged inside the annular LC oscillation antenna. On one hand, the commodity burglar alarm solves the problems of small effective volume of a small-sized label, small Q value, small impedance conversion and incapability of being applied to a wider given detection area. On the other hand, the commodity burglar alarm increases the relevance ratio of EAS markers in the given detection area and improves use reliability of the commodity burglar alarm.
Description
Technical field:
The utility model relates to commodity anti-theft apparatus.
Background technology:
Eas (EAS) system is for finding the detection system that contains EAS label commodity anti-theft apparatus in given surveyed area.The EAS system has many purposes, but great majority are used as the security system that prevents shoplifting or take away equipment in the office building.The EAS system has many different forms, uses many different technology.Typical EAS system comprises an electronic detection unit, some marks/or EAS label and stripping attachment or deactivator.
In the commodity anti-theft field, mark/or the EAS label be arranged in the commodity anti-theft apparatus under many circumstances, commodity anti-theft apparatus has the mechanism that can be connected with commodity and with the latch fitting of this bindiny mechanism's locking, and therefore make mark/or the EAS label be connected on the commodity together with commodity anti-theft apparatus; Detecting unit is arranged on the zone of flow of the people maximum usually, such as the place, gateway of shop or office building.When the mark that has activation when the surveyed area, EAS system sounding tone alerts, connect warning light or activate other suitable panalarms, show that the article of attach mark are taken out of from the defined zone, thereby prevent that commodity are stolen.
The impedance conversion value that contains EAS label commodity anti-theft apparatus is big more, allows the given surveyed area can be wide more, and recall rate is high more in given surveyed area simultaneously.Present contains EAS label commodity anti-theft apparatus in order to have bigger impedance conversion, and volume is bigger usually.But, can observe commodity all sidedly for the outward appearance of not disturbing commodity makes the buyer, the volume size of commodity anti-theft apparatus is very restricted, thereby the volume of applied EAS label is very limited, use present EAS label, antitheft reliability is subjected to restriction to a certain degree.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of commodity anti-theft apparatus, and it has wideer surveyed area under equal volume.For this reason, the utility model by the following technical solutions: it comprises plastic casing, and annular LC vibration antenna is set in the commodity anti-theft apparatus, in annular LC vibration antenna toroidal core is set.Because adopt the technical solution of the utility model, it is little that the utility model first aspect has solved the compact tag active volume, the Q value is little, and impedance conversion is little, can not be applied to the problem of the given surveyed area of broad; Second aspect has improved the recall rate of EAS label at given surveyed area, has improved the reliability that commodity anti-theft apparatus uses.
Description of drawings
Fig. 1 is the structural representation of embodiment that the utility model provides.
Fig. 2 a is for adopting the commodity anti-theft apparatus frequency spectrum width of cloth phase test pattern of the utility model scheme, and the horizontal ordinate among the figure is the frequency sweep frequency values, and ordinate is corresponding amplitude.
Fig. 2 b is a general goods alarm frequency spectrum width of cloth phase test pattern, and the horizontal ordinate among the figure is the frequency sweep frequency values, and ordinate is corresponding amplitude.
Fig. 3 a adopts the side direction recall rate figure of the commodity anti-theft apparatus of the utility model scheme in the high outlet detection system of the wide 160cm of given 150cm, and the horizontal ordinate among the figure is represented channel width, and ordinate is a channel height, and darker regions is for can not detect the zone.
Fig. 3 b is and the general goods alarm of Fig. 3 a equal volume side direction recall rate figure in the high outlet detection system of the wide 160cm of given 150cm, and the horizontal ordinate among the figure is represented channel width, and ordinate is a channel height, and darker regions is for can not detect the zone.
Fig. 4 a adopts the horizontal recall rate figure of the commodity anti-theft apparatus of the utility model scheme in the high outlet detection system of the wide 160cm of given 150cm, and the horizontal ordinate among the figure is represented channel width, and ordinate is a channel height, and darker regions is for can not detect the zone.
Fig. 4 b is and the general goods alarm of Fig. 4 a equal volume horizontal recall rate figure in the high outlet detection system of the wide 160cm of given 150cm, and the horizontal ordinate among the figure is represented channel width, and ordinate is a channel height, and darker regions is for can not detect the zone.
Fig. 5 a adopts the vertical recall rate figure of the commodity anti-theft apparatus of the utility model scheme in the high outlet detection system of the wide 160cm of given 150cm, and the horizontal ordinate among the figure is represented channel width, and ordinate is a channel height, and darker regions is for can not detect the zone.
Fig. 5 b is and the general goods alarm of Fig. 5 a equal volume vertical recall rate figure in the high outlet detection system of the wide 160cm of given 150cm, and the horizontal ordinate among the figure is represented channel width, and ordinate is a channel height, and darker regions is for can not detect the zone.
Embodiment
With reference to accompanying drawing.The utility model comprises plastic casing 1, and annular LC vibration antenna 2 is set in the commodity anti-theft apparatus, in annular LC vibration antenna toroidal core 3 is set.
Commodity anti-theft apparatus is provided with latch fitting, described latch fitting is the latch fitting at the set mechanism that is connected with commodity of commodity anti-theft apparatus, make mark/or the EAS label be connected on the commodity together with commodity anti-theft apparatus, described latch fitting is generally the metal manufacturing or contains metal, its structure can adopt lock pin, can place sliding seat of ball or the like, latch fitting can be by attraction and front and back or slide up and down, and pins or released state thereby be in; As shown in Figure 1, in the utility model, described latch fitting preferably is installed in the ring of toroidal core, can play magnetic field shielding like this, reduces the influence of latch fitting induced field to coil.
The utility model also is provided with metallic sheath 5 outside described latch fitting, in the accompanying drawings, latch fitting is in the metallic sheath 5, so latch fitting does not show in the accompanying drawings that the structure of latch fitting can adopt the described structure commonly used at present of epimere fully, so repeat no more in the present embodiment.Described metallic sheath is the alloy material of nonferromugnetic material.Performance is better so on the one hand, on the other hand, can reduce the attractive force of lockaid gun to latch fitting, adds behind the magnetic core mutually suction with alleviation and increases and cause using inconvenience.
Use magnetic core to place in the middle of the annular LC vibration antenna 2 in the utility model, increase the active volume factor of tours antenna, also improved the Q value of antenna, also reduced the eddy current loss of metal latch fitting inside simultaneously, the factor that influences aerial loss is reduced, further improved the Q value of antenna.
Gapped between annular LC vibration antenna and the toroidal core, the toroidal core height is suitable with annular LC vibration antenna height, and the toroidal core height is not less than annular LC vibration antenna height.In the present embodiment, toroidal core 3 adopts nickel-zinc ferrite, has the characteristic of the low specific loss of high magnetic conductance, can further increase the active volume factor of tours antenna, the Q value of raising antenna.Annular LC vibration antenna relies on plastic casing and positions, and annular LC vibration antenna outward flange is close to plastic casing, thereby can be convenient to the gap design between annular LC vibration antenna and the toroidal core.
Also form locating sleeve 6 in the plastic casing, toroidal core is enclosed within outside the locating sleeve 6,6 pairs of toroidal cores of locating sleeve play the role of positioning, its height is suitable with the height of toroidal core, to prevent when unblanking, toroidal core is attracted by lockaid gun and beats, and described locating sleeve 6 also plays the role of positioning to metallic sheath 5 simultaneously.
Table 1 is the alarm of employing technical solutions of the utility model and each parameter comparison table of common alarm of equal volume, common alarm is not except adding toroidal core 3, all the other are identical with the utility model, and the size of the LC vibration antenna that they adopt is identical, is φ 30 * 14mm.
| Project name | The centre frequency scope | Active volume factor (cm 3)? | The Q value | Impedance conversion |
| The utility model commodity anti-theft apparatus | 8.0-8.4MHz? | 2500? | 180? | 4.5dB? |
| The general goods alarm | 8.0-8.4MHz? | 1400? | 135? | 1.9dB? |
Conclusion: adopt the technical solution of the utility model, under the situation of equal volume, same size LC annular vibration antenna, higher active volume, higher Q value and bigger impedance conversion scope can be obtained, thereby higher recall rate or the bigger scope that detects can be obtained.
Fig. 2 a and Fig. 2 b are respectively with the corresponding the utility model commodity anti-theft apparatus of table 1 with the frequency spectrum width of cloth of volume general goods alarm test pattern mutually.In the drawings, the frequency band from the peak to the minimum point is narrow more, and the Q value is big more; Big more to the minimum point difference from peak, the active volume factor is big more, and the impedance conversion value is big more.
In conjunction with Fig. 3 a, 3b, 4a, 4b, 5a, 5b, as can be seen, use the technical solution of the utility model, all obtained increase in the zone that detects of all directions.
Claims (8)
1. a commodity anti-theft apparatus comprises plastic casing, it is characterized in that being provided with in the commodity anti-theft apparatus annular LC vibration antenna, in annular LC vibration antenna toroidal core is set.
2. a kind of commodity anti-theft apparatus as claimed in claim 1 is characterized in that commodity anti-theft apparatus is provided with latch fitting, and described latch fitting is installed in the ring of toroidal core.
3. a kind of commodity anti-theft apparatus as claimed in claim 1 is characterized in that toroidal core adopts nickel-zinc ferrite.
4. a kind of commodity anti-theft apparatus as claimed in claim 2 is characterized in that being provided with metallic sheath outside described latch fitting, and described metallic sheath is the alloy material of nonferromugnetic material.
5. a kind of commodity anti-theft apparatus as claimed in claim 1 is characterized in that between annular LC vibration antenna and the toroidal core gapped.
6. a kind of commodity anti-theft apparatus as claimed in claim 1 is characterized in that annular LC vibration antenna relies on plastic casing and positions, and annular LC vibration antenna outward flange is close to plastic casing.
7. a kind of commodity anti-theft apparatus as claimed in claim 4 is characterized in that it is provided with the locating sleeve of toroidal core in the ring of toroidal core, and described locating sleeve is located metallic sheath simultaneously.
8. a kind of commodity anti-theft apparatus as claimed in claim 1 is characterized in that toroidal core height and annular LC vibration antenna height is suitable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201974439U CN201654934U (en) | 2009-09-28 | 2009-09-28 | Commodity burglar alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201974439U CN201654934U (en) | 2009-09-28 | 2009-09-28 | Commodity burglar alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201654934U true CN201654934U (en) | 2010-11-24 |
Family
ID=43120179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201974439U Expired - Lifetime CN201654934U (en) | 2009-09-28 | 2009-09-28 | Commodity burglar alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201654934U (en) |
-
2009
- 2009-09-28 CN CN2009201974439U patent/CN201654934U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
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. 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. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |