CN2911814Y - Antitheft monitor set on metal outer frame - Google Patents
Antitheft monitor set on metal outer frame Download PDFInfo
- Publication number
- CN2911814Y CN2911814Y CN 200620034793 CN200620034793U CN2911814Y CN 2911814 Y CN2911814 Y CN 2911814Y CN 200620034793 CN200620034793 CN 200620034793 CN 200620034793 U CN200620034793 U CN 200620034793U CN 2911814 Y CN2911814 Y CN 2911814Y
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- CN
- China
- Prior art keywords
- breach
- metal outer
- outer frame
- frame
- passage rack
- 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 - Fee Related
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Abstract
The utility model discloses a metallic frame burglarproof monitor. An audio exciting coil (2), a signal detection coil (3), and packing (4) are embedded inside the channel frame (1). At least one notch is arranged in the coil in the non-magnetic conductive channel frame (1). Since non-magnetic conductive materials are used as the basic frame of the channel frame, interference immunity, wear-resistance, shockproof, and visual attraction are then improved. Also, since a notch is arranged in the channel frame hence no closed ring is formed, no considerable eddy current is incurred even a metallic frame is used by the utility model, ensuring a proper operation of the detection channel and a performance comparable with similar products.
Description
Technical field
The utility model relates to the antitheft instrument of books, the antitheft monitor of especially a kind of metal outer frame.
Background technology
It is a kind of equipment that present domestic library and bookstore even shop generally are used for theft management for a needle detector (also claiming books antitheft instrument), this equipment main composition partly is sense channel (an abbreviation passage), this passage is that wooden or plastic of conduit is configured to by both sides, be embedded with audio excitation (magnetic field) coil and input coil as passage rack, when drive coil passes to tone currents, then just be distributed with the audio frequency alternating electromagnetic field in the passage on request, when passage is passed through in the book fair that contains needle (or commodity), because the excitation in audio frequency magnetic field, needle just sends the signal of certain frequency, this signal just sends alerting signal after being received by magnetic test coil in the passage rack, thereby reaches the purpose of theft management.But in the voice-grade channel or neighbouring never allow large-scale metallic conductor appears, because the appearance meeting of metallic conductor produces eddy current under the effect of alternating magnetic field, and the appearance of eddy current can weaken the audio electromagnetic field in the passage, and change original DISTRIBUTION OF MAGNETIC FIELD, also can destroy the balance of magnetic test coil, thereby influence the normal operation of instrument, when serious instrument can't be moved at all, above-mentioned factor is exactly the basic reason why domestic and international for many years producer that produces this instrument all dare not adopt the metal passage frame.In addition, distortion appears because wooden passage rack can make moist, plastics also can all can influence the normal operation of passage rack because of aging variation, and all be not so good as the metallic passage rack from wear-resisting and anticollision and outward appearance, but for above-mentioned reasons, the passage rack of this instrument all cannot be realized making passage rack with metal material up to now.
Summary of the invention
The purpose of this utility model provides a kind of antitheft monitor of metal outer frame of strong interference immunity, solves the problem that existing passage rack all cannot realize making with metal material passage rack.
In order to achieve the above object, the utility model adopts following technical scheme: the antitheft monitor of a kind of metal outer frame, audio excitation coil, input coil and filling material have been embedded at passage rack, the closed channel frame that is made of the non-magnetic metal material contains the coil place and is provided with 1 above breach, promptly audio excitation coil and input coil must be contained in the closed channel frame place that is provided with breach, and so-called breach is exactly that frequency drive coil in the passage rack and input coil are disconnected.The closed channel frame is provided with 1 above breach and comprises 1 this situation of breach only is set on the closed channel frame.
Described closed channel frame top is provided with a breach or is symmetrically arranged with two breach at closed channel frame upper and lower.
Described passage rack periphery is equipped with the outrigger that is made of the non-magnetic metal material.
Described passage rack assumes diamond in shape; Outrigger is " n " type.
The breach of described passage rack is provided with nonmetal joint.
Adopt the basic framework of the tubing (circular, square) of non-magnetic metal material (as copper, aluminium, aluminium alloy, stainless steel etc.) in this programme as passage rack, audio excitation coil and input coil are embedded, when drive coil passes to tone currents, although also can produce eddy current in the metal tube, because tube wall is thinner, its influence is very little, so the magnetic field intensity of the passage rack of distribution of passage internal magnetic field and identical non-metallic material is just the same with distribution.Because the closed channel frame that is made of the non-magnetic metal material is provided with breach, the passage rack of metal pipe material manufacturing does not constitute closed hoop, therefore the big becket of passage rack formation can not form great eddy current, make the normal fully operation of sense channel, and can reach with the same effect of similar product, and because the antitheft monitor of this programme adopts metal frame, metal frame can form the metal external shield, makes the antitheft monitor strong interference immunity of metal outer frame in this programme.In addition, the road frame assumes diamond in shape, and the breach that outrigger is " n " type and passage rack is provided with nonmetal joint, makes the utility model good looking appearance.
The utility model has the advantages that: because the utility model adopts the basic framework of non-magnetic metal material as passage rack, thereby strong interference immunity, wearing quality and anticollision are strong, good looking appearance, owing to jaggedly on the passage rack do not constitute closed hoop, even thereby the utility model adopts metal frame also can not form great eddy current as passage rack, sense channel can fully normally be moved, and can reach with the same effect of similar product.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the cross-sectional view of passage rack 1 in the utility model.
Embodiment
The structure of the antitheft monitor of a kind of metal outer frame of the utility model is as shown in Figure 1 and Figure 2: mainly be made of passage rack 1, audio excitation coil 2, input coil 3, filling material 4, outrigger 5, nonmetal joint 6, wherein passage rack 1 and outrigger 5 adopt the tubing (circular, square) of non-magnetic metal material (as copper, aluminium, aluminium alloy, stainless steel etc.), be embedded in audio excitation coil 2, input coil 3 and filling material 4 at passage rack 1, the closed channel frame 1 that is made of the non-magnetic metal material contains the coil place and is provided with 1 above breach.Promptly audio excitation coil and input coil must be contained in the closed channel frame place that is provided with breach, and in addition, the closed channel frame is provided with 1 above breach and comprises 1 this situation of breach only is set on the closed channel frame.Also a breach can be set below closed channel frame 1, also can be symmetrically arranged with two breach, also more breach can be set, also can on closed channel frame 1, be provided with other position at closed channel frame 1 upper and lower.Most critical be that audio excitation coil and input coil must be contained in the place that the closed channel frame is provided with breach, its objective is and make passage rack can not constitute closed hoop, so-called breach is exactly that frequency drive coil in the passage rack and input coil are disconnected, and the outrigger 5 that is made of the non-magnetic metal material is installed in passage rack 1 periphery.Passage rack 1 can assume diamond in shape, and also can be circle etc.; Outrigger 5 is " n " type, also can its objective is for good looking appearance for other shape.The breach of passage rack 1 is provided with nonmetal joint 6, and this nonmetal joint 6 can hide the breach of passage rack 1, and its purpose also is for good looking appearance, also can make some copys on nonmetal joint 6 simultaneously.
Claims (8)
1, the antitheft monitor of a kind of metal outer frame, be embedded in audio excitation coil (2), input coil (3) and filling material (4) at passage rack (1), it is characterized in that: the closed channel frame (1) that is made of the non-magnetic metal material contains the coil place and is provided with 1 above breach.
2, the antitheft monitor of metal outer frame according to claim 1 is characterized in that: be provided with a breach or be symmetrically arranged with two breach at closed channel frame upper and lower in closed channel frame (1) top.
3, the antitheft monitor of metal outer frame according to claim 1 and 2 is characterized in that: the outrigger (5) that is made of the non-magnetic metal material is installed in passage rack (1) periphery.
4, the antitheft monitor of metal outer frame according to claim 1 and 2 is characterized in that: passage rack (1) assumes diamond in shape; Outrigger (5) is " n " type.
5, the antitheft monitor of metal outer frame according to claim 3 is characterized in that: passage rack (1) assumes diamond in shape; Outrigger (5) is " n " type.
6, according to claim 1 or the antitheft monitor of 2 or 5 described metal outer frames, it is characterized in that: the breach of passage rack (1) is provided with nonmetal joint (6).
7, the antitheft monitor of metal outer frame according to claim 3 is characterized in that: the breach of passage rack (1) is provided with nonmetal joint (6).
8, the antitheft monitor of metal outer frame according to claim 4 is characterized in that: the breach of passage rack (1) is provided with nonmetal joint (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034793 CN2911814Y (en) | 2006-06-30 | 2006-06-30 | Antitheft monitor set on metal outer frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034793 CN2911814Y (en) | 2006-06-30 | 2006-06-30 | Antitheft monitor set on metal outer frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2911814Y true CN2911814Y (en) | 2007-06-13 |
Family
ID=38133676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620034793 Expired - Fee Related CN2911814Y (en) | 2006-06-30 | 2006-06-30 | Antitheft monitor set on metal outer frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2911814Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701964A (en) * | 2013-12-30 | 2014-04-02 | 上海坤锐电子科技有限公司 | SIM card support of iPhone all-card scheme |
-
2006
- 2006-06-30 CN CN 200620034793 patent/CN2911814Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701964A (en) * | 2013-12-30 | 2014-04-02 | 上海坤锐电子科技有限公司 | SIM card support of iPhone all-card scheme |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070613 |