CN106611466B - A kind of anti-theft device for commodities - Google Patents
A kind of anti-theft device for commodities Download PDFInfo
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- CN106611466B CN106611466B CN201510706864.XA CN201510706864A CN106611466B CN 106611466 B CN106611466 B CN 106611466B CN 201510706864 A CN201510706864 A CN 201510706864A CN 106611466 B CN106611466 B CN 106611466B
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- main body
- theft
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
- G08B13/1409—Mechanical actuation by lifting or attempted removal of hand-portable articles for removal detection of electrical appliances by detecting their physical disconnection from an electrical system, e.g. using a switch incorporated in the plug connector
Abstract
The present invention provides a kind of anti-theft device for commodities, a kind of anti-theft device for commodities, including the first main body and the second main body, first main body and the second main body are respectively arranged with shell, first main body and the second main body are provided with anti-theft warning circuit, are connected between first main body and the anti-theft warning circuit of the second main body by solid conductor.The present invention can be realized conventional solid conductor and connect two main bodys progress anti-theft protections, and only wirerope does signal conductor, is easy disconnected core wire and makees ground wire；The present invention can be widely applied for commodity anti-theft and show etc. in split type device, and improve the service life of device, good anti-theft effect simultaneously avoids reporting by mistake, and alarm while can be realized simultaneously two main bodys of fission, further increase anti-theft effect.
Description
Technical field
The present invention relates to a kind of anti-theft device for commodities more particularly to a kind of device to be divided into host, slave two parts and two
/ conducting wire connection is used to realize the anti-theft device for commodities of commodity alarm.
Background technique
Current goods display antitheft apparatus is mainly made of two parts, it may be assumed that pedestal and inductive head.Pedestal, inductive head
It is connected by the wirerope conducting wire with core wire, wirerope and core wire form a circuit loop, and prior art merchandise display is antitheft
Apparatus structure schematic diagram is shown in that Fig. 1, prior art goods display antitheft apparatus electrical schematic diagram are shown in Fig. 2, steel wire of the prior art with core wire
Rope conductive wire cross-section schematic diagram is shown in Fig. 3.
Inductive head wiring board is arranged on the circuit that wirerope and core wire are formed, and insulate between wirerope and core wire, outermost
Bread wraps up in a layer insulating, makes the spooler or spring wire being coiled into that be in line, and protected commodity are mounted on inductive head,
When following one of situation occurs: commodity are removed from inductive head, conducting wire is cut, pedestal is removed from mounting table,
Base circuit, which can control, makes a sound alarm, and LED light flashes, to remind administrative staff to handle, for expensive article
Carry out self service and carry out effective protection that extraordinary effect can be played.
Existing goods show anti-theft device, and since protected commodity are mounted on inductive head, potential customer's experience is looked into
When seeing commodity, the inductive head that generally can all in succession lifts commodity together, so that wirerope conducting wire is affected, when conducting wire is pulled often
, for example, (service life of goods display antitheft apparatus is to calculate for 3 years, and daily 28 times average, this is for passenger flow after more than 30000 times
Measure for very big shop, be not also a very high frequency), the core wire inside conducting wire is easy to break, to cause commodity anti-
It steals the false alarm of device or does not alarm, cause to perplex to administrative staff, can not meet shop needs the service life for showing anti-theft device
It asks.
In addition, existing goods show anti-theft device, there are one disadvantage: sound alarm module, LED light are under normal circumstances all
It can only be arranged on the circuit of pedestal, when thief cuts conducting wire and takes the commodity on inductive head away, only pedestal is alarmed, attachment
The inductive head of commodity not will call the police then, and administrative staff can not have found that who is thief in time, so that commodity can not be recovered quickly.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of anti-theft device for commodities, can connect two using solid conductor
Main body improves the service life of device, two-way detection of breaking, and good anti-theft effect simultaneously avoids reporting by mistake.For this purpose, the present invention uses
Following technical scheme:
A kind of anti-theft device for commodities, including the first main body and the second main body, the first main body and the second main body are respectively arranged with
Shell, it is characterised in that first main body and the second main body are provided with anti-theft warning circuit, first main body and second
It is connected between the anti-theft warning circuit of main body by solid conductor；
Feedback signal detection module, signal generating source are respectively provided in the anti-theft warning circuit of the first main body and the second main body
Module, signal conversion circuit, the solid conductor are connected to the signal conversion circuit port of the first main body and the letter of the second main body
Between the port of number translation circuit；
In first main body, signal generating source module is arbitrary for first frequency F1, duty ratio for issuing frequency
Square wave W1, the primary sinusoid W2 that signal conversion module is used to square wave W1 be transformed to generation rule, frequency is first frequency F1,
Primary sinusoid W2 inputs to the signal conversion circuit of the second main body through the solid conductor, and the detection of feedback signal detection module is defeated
Out；
In second main body, signal generating source module is arbitrary for second frequency F2, duty ratio for issuing frequency
Square wave W3, the second sine wave W4 that signal conversion module is used to square wave W3 be transformed to generation rule, frequency is first frequency F1,
Second sine wave W4 inputs to the signal conversion circuit of the first main body through the solid conductor, and the detection of feedback signal detection module is defeated
Out；
The signal conversion module of first main body is also used to for primary sinusoid W2 and the second sine wave W4 being overlapped, and second
The signal conversion module of main body is also also used to for primary sinusoid W2 and the second sine wave W4 being overlapped；
Feedback signal detection module in first main body is used to detect the letter of the signal conversion module in the first main body
Number, the feedback signal detection module in the second main body is used to detect the signal of the signal conversion module in the second main body.
Further, first main body is the pedestal in commodity anti-theft displaying device, and second main body is anti-for commodity
Steal the inductive head shown in device.
Further, the signal generating source module of the first main body and feedback signal detection module can be by microprocessor or collection
The function of the two is realized at circuit, the signal generating source module and feedback signal detection module of the second main body can also be by micro-
Processor controls chip to realize the function of the two.
Further, one of main body of the first main body and the second main body is separably shelved in another main body；
Be both provided with rechargeable battery and charging circuit in described two main bodys, contact switch be set between two main bodys so that it is described its
In main body when being shelved in another described main body, another described main body can be to one of main body charging, institute
When stating one of main body and leaving another described main body, another described main body cannot be to one of main body charging.
Further, one in voice guard and light-emitting alarm is at least arranged in the first main body and the second main body
Kind, voice guard and light-emitting alarm are in anti-theft warning circuit, and are connected with above-mentioned microprocessor or control chip.
Due to using technical solution of the present invention, it can be realized conventional solid conductor and connect two antitheft guarantors of main bodys progress
Shield, only wirerope does signal conductor, is not easy disconnected core wire and makees ground wire；The present invention can be widely applied for commodity anti-theft exhibition
Show etc. in split type device, improves the service life of device, good anti-theft effect simultaneously avoids reporting by mistake, and can be realized simultaneously
It alarms while two main bodys of fission, further increases anti-theft effect.
Detailed description of the invention
Fig. 1 is background technique goods display antitheft apparatus structure diagram
Fig. 2 is background technique goods display antitheft apparatus electrical schematic diagram
Fig. 3 is the cross-sectional view with core wire wirerope conducting wire used in background technique goods display antitheft apparatus.
Fig. 4 is signal transduction flow diagram of the invention.
Fig. 5 is the connection schematic diagram of the first main body and the second main body anti-theft warning circuit.
Specific embodiment
Referring to shown in attached drawing 1,2,3.Current goods display antitheft apparatus is mainly made of two parts, it may be assumed that pedestal
100 with inductive head 200.Pedestal 100, inductive head 200 by 302 conducting wire of wirerope with core wire 301 be connected, wirerope 302 with
Core wire 301 makes the anti-theft warning circuit in pedestal form a circuit loop.
Inductive head wiring board is arranged on the circuit that wirerope and core wire are formed, and insulate 303 between wirerope and core wire, most
A layer insulating 304 is wrapped up in outside, makes the spooler or spring wire being coiled into that be in line, and protected commodity are mounted on induction
On head, when following one of situation occurs: commodity are removed from inductive head, conducting wire is cut, pedestal is from mounting table
It removes, base circuit, which can control, makes a sound alarm, and LED light flashes, to remind administrative staff to handle.Drawing reference numeral
Whether 201 leave the switch of inductive head for the induction item to be protected on inductive head, and drawing reference numeral 101 is to incude pedestal on pedestal
The switch whether being lifted.
Referring to attached drawing 4.Anti-theft device for commodities provided by the present invention, including the first main body and the second main body, the first main body 1
It is respectively arranged with shell with the second main body 2, the present embodiment is by taking goods display antitheft apparatus as an example, the first main body 1 and the second main body 2
Respectively pedestal and inductive head, relationship is see also Fig. 1.
Pedestal and inductive head are provided with anti-theft warning circuit.
Feedback signal detection module 13, signal generating source module 11, signal are arranged in the anti-theft warning circuit of pedestal to become
Change circuit 12；Feedback signal detection module 23, signal generating source module 21, signal are arranged in the anti-theft warning circuit of inductive head to become
Change circuit 22.
Connected between the port of the signal conversion circuit of the signal conversion circuit port and inductive head of pedestal by solid conductor 3
It connects；The solid conductor refers to a signal conductor, without ground wire.
It is the same that first main body 1 is connected with the circuit theory in the second main body 2, but each component parameter is different, for side
Just for the sake of, in the present embodiment Fig. 5, the first main body 1, the second main body 2 circuit diagram in, the identical component of function, use is identical
Symbology.
The present invention detects the connection status of solid conductor by feedback signal detection module, successful connection state2, not
Connection or broken string are state1.
It is F1, the arbitrary square wave W1 of duty ratio when the signal generating source module 11 of pedestal issues frequency.Become through base signal
Change the mold 12 generation rule of block, the sine wave W2 that frequency is F1.Feedback signal detection module 13 can detect current signal condition note
The output of port 2 for state1, signal conversion circuit 12 is frequency sine wave W2 identical with F1, and sine wave W2 is output to list
Root conducting wire 3,3 other end of solid conductor are connected with 22 port 4 of signal conversion circuit of inductive head.The signal generating source mould of inductive head
It is arbitrary square wave W3 that the generation frequency of block 21, which is F2 duty ratio, and 3 output frequency of port through signal conversion circuit 22 is equal with F2
Sine wave W4 connecting wire, finally enter the port 2 of pedestal signal conversion circuit 12.
In this way, signal conversion circuit 12 is superimposed by sine wave W2 with sine wave W4 input, generated through signal conversion module 12
The fixed rectangular wave of frequency, feedback signal detection module 13 can detect current waveform state, judge single line successful connection, pedestal
Feedback signal detection module 13 judge current state for State2.
Since inductive head is identical as the circuit of pedestal, thus the input waveform of signal conversion circuit 22 be also by sine wave W2 and
Sine wave W4 superposition, then generate rectangular wave identical with signal conversion circuit 12 through signal conversion circuit 22 and detected to feedback signal
Module 23 judges current state for State2.
When solid conductor 3 disconnects, the feedback signal detection module 13,23 of inductive head and pedestal judges current form shape
State all becomes state1, to realize the two-way detection of broken string.
Above-mentioned signal generating source module and feedback signal detection module can realize two kinds by a MCU or control chip
Function or different two MCU control chips realize that signal occurs and feedback model detection respectively.
W2 is superimposed the frequency of the square wave of the rule generated with W4: as F1 > F2, F3=F1-F2；As F2 > F1, F3=F2-
F1。
Referring to Fig. 4,5.The signal conversion circuit and waveform of pedestal, which change, to be summarized:
The square wave W1 for being F1 by the frequency that the 16th foot WAVE_OUT of master chip MCU is exported is humorous through inductance L1 and capacitor C30
Vibration forms sine wave W2.Sine wave W2 points are two-way, are output to the WAVE_CM of inductive head through the port WAVE_CM, conducting wire 3 all the way
Port, meanwhile, the port pedestal WAVE_CM receives the sine wave W4 from the port inductive head WAVE_CM through conducting wire 3.
Another way sine wave W2, together with the sine wave W4 received, through diode D5 one-way commutation diode, removal is sinusoidal
The negative half period of wave obtains the blank waveform of difference frequency.Since positive half cycle waveforms amplitude is excessively high at this time, amplitude drop is realized through capacitor C28
Low, waveform is denoted as T1.The waveform that wave T1 so passes through amplitude transformation divides two-way to export.Mono- tunnel waveform T1 is through capacitor C24, resistance
R31 couples output waveform T2, and waveform T2 points are two-way, is coupled on the 3rd foot of voltage follower U3A all the way.Another way is through electricity
Resistance R32 is connected to the 12nd foot of U3D, after voltage follower U3D impedance R27, R30 matching, output waveform T3.Waveform T1 is another
Road is coupled on the 2nd foot of voltage follower U3A, and the T2 waveform on the 3rd foot of voltage follower U3A, through operational amplifier
After U3A impedance matching, through resistance R28 be connected to by resistance R24, voltage follower U3B, capacitor C16, capacitor C18, resistance R25,
After the two-stage impedance matching circuit that capacitor C17, resistance R26, capacitor C23, voltage follower U3C are formed, final waveform output connects
It is connected to coupled capacitor C22, through C22 and R27, is integrated with T2 waveform, finally obtains the W2's for meeting demand and W4 in WAVE_OT foot
Difference frequency square wave.Wave_OT foot must have pull-up resistor, this pull-up resistor is built-in to be added in or beyond the pin of feedback detection module,
To realize that normal high level output, the waveform that WAVE_OT foot generates are judged by feedback signal detection module.This circuit need to pass through
Adjust different capacitors, resistance, inductance value etc. realize functional trimming, it is all meet such as figure device principle figure connection (do not consider device
Value), all think the essence, the range that belong to signal conversion circuit.
Other circuit modules of pedestal:
Master chip U5, input module switch, the bar magnet receiving module, sound alarm module, LED being connected on master chip U5
Lamp indicating module, battery low-voltage detection module, external power supply detection module, external power supply power module of voltage regulation, super-charge super-discharge
Electric protection module, charge control module, rechargeable battery 7.
Input module switch, connection inductive head switchs, to the USB connecting line to be charged by protection commodity, when master chip U5 is examined
It measures after inductive head switch state changes, alternatively, when USB connecting line disconnects, master chip U5 alarm；
Bar magnet receiving module to master chip U5 setting password, releases alarm (core for receiving the password from remote controler
To the password stored in master chip U5 and from the password of remote controler, if unanimously, with regard to stop alarm)；
Sound alarm module, LED light indicating module, when pedestal switch, inductive head switch, conducting wire disconnect or supply to commodity
After the USB line of electricity disconnects, master chip U5 can trigger sound alarm module, LED light indicating module is alarmed.
Battery low-voltage detection module, for detecting the voltage of DC power supply, when detect DC power supply be less than a certain limit
When value, LED light indicating module carries out prompt and charges.
External power supply detection module, for detecting whether external power supply is just rectified by external power supply if can detecte
Each module is powered after pressure stabilizing.
External power supply power module of voltage regulation, for giving external power supply rectifying and voltage-stabilizing.
Super-charge super-discharge electric protection module, prevents over-charging of battery, over-discharge from damaging to battery.
Charge control module controls charging current, with prevent charging current it is excessive cause to be not fully filled, electric current is too small causes to fill
Electric overlong time.
Battery low-voltage detection module, external power supply detection module, external power supply power module of voltage regulation, super-charge super-discharge electricity are protected
Shield module, charge control module belong to charging circuit.
In goods display antitheft apparatus, inductive head is separably shelved on pedestal；External charge power supply on pedestal
Port is positive terminal mouth VIN1, GND1, draws cable 5, cable 5 and inductive head from external charge positive pole port VCC5.0
External charge positive pole port VCC5.0 is connected, and draws cable 6, cable 6 and sense from external charge power ground port GND1
It answers the external power supply grounding ports GND1 of head to be connected, contact switch 4 is set among cable 5, cable 6, when inductive head is shelved on bottom
When on seat, contact switch 4 is connected, and external charge power supply is charged by cable 5, cable 6 to inductive head, when inductive head leaves pedestal
When, contact switch 4 disconnects, and external charge power supply can not be charged by cable 5, cable 6 to inductive head.
The principle and connection of inductive head circuit and base circuit are identical.
Above is only a specific embodiment of the present invention, but structure feature of the invention is not limited thereto, Ren Heben
Within the field of the present invention, made changes or modifications all cover within the protection scope of the present invention the technical staff in field.
Claims (5)
1. a kind of anti-theft device for commodities, including the first main body and the second main body, the first main body and the second main body are respectively arranged with outer
Shell, it is characterised in that first main body and the second main body are provided with anti-theft warning circuit, first main body and the second master
It is connected between the anti-theft warning circuit of body by solid conductor；
Feedback signal detection module, signal generating source mould are respectively provided in the anti-theft warning circuit of the first main body and the second main body
Block, signal conversion circuit, the solid conductor are connected to the signal conversion circuit port of the first main body and the signal of the second main body
Between the port of translation circuit；
In first main body, signal generating source module is first frequency F1, the arbitrary square wave of duty ratio for issuing frequency
W1, the primary sinusoid W2 that signal conversion module is used to square wave W1 be transformed to generation rule, frequency is first frequency F1, first
Sine wave W2 inputs to the signal conversion circuit of the second main body, the detection output of feedback signal detection module through the solid conductor；
In second main body, signal generating source module is second frequency F2, the arbitrary square wave of duty ratio for issuing frequency
W3, the second sine wave W4 that signal conversion module is used to for square wave W3 to be transformed to generation rule, frequency is first frequency F1, second
Sine wave W4 inputs to the signal conversion circuit of the first main body, the detection output of feedback signal detection module through the solid conductor；
The signal conversion module of first main body is also used to for primary sinusoid W2 and the second sine wave W4 being overlapped, the second main body
Signal conversion module be also also used to for primary sinusoid W2 and the second sine wave W4 being overlapped；
Feedback signal detection module in first main body is used to detect the signal of the signal conversion module in the first main body, the
Feedback signal detection module in two main bodys is used to detect the signal of the signal conversion module in the second main body.
2. a kind of anti-theft device for commodities as described in claim 1, it is characterised in that first main body is commodity anti-theft displaying
Pedestal in device, second main body are the inductive head in commodity anti-theft displaying device.
3. a kind of anti-theft device for commodities as described in claim 1, it is characterised in that the signal generating source module of the first main body and
Feedback signal detection module can be realized the function of the two by microprocessor or integrated circuit, and the signal of the second main body occurs
Source module and feedback signal detection module can also be realized the function of the two by microprocessor or control chip.
4. a kind of anti-theft device for commodities as described in claim 1, it is characterised in that wherein the one of the first main body and the second main body
A main body is separably shelved in another main body；
Rechargeable battery and charging circuit are both provided in first main body and the second main body, setting contact is opened between two main bodys
It closes, when so that one of main body being shelved in another described main body, another described main body can be to described wherein one
A main body charging, when one of main body leaves another described main body, another described main body cannot be to described in wherein
One main body charging.
5. a kind of anti-theft device for commodities as described in claim 1,2,3 or 4, which is characterized in that main in the first main body and second
One of voice guard and light-emitting alarm are at least set in body, and voice guard and light-emitting alarm are in anti-theft journal
In alert circuit, and it is connected with microprocessor or control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706864.XA CN106611466B (en) | 2015-10-27 | 2015-10-27 | A kind of anti-theft device for commodities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706864.XA CN106611466B (en) | 2015-10-27 | 2015-10-27 | A kind of anti-theft device for commodities |
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| Publication Number | Publication Date |
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| CN106611466A CN106611466A (en) | 2017-05-03 |
| CN106611466B true CN106611466B (en) | 2019-02-01 |
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| CN201510706864.XA Active CN106611466B (en) | 2015-10-27 | 2015-10-27 | A kind of anti-theft device for commodities |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109671237A (en) * | 2019-02-22 | 2019-04-23 | 深圳亿东科技股份有限公司 | A kind of commodity anti-theft method and the commodity anti-theft alarm based on this method |
| WO2022170685A1 (en) * | 2021-02-09 | 2022-08-18 | 格美特智能电子科技(昆山)有限公司 | Commodity anti-theft device |
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| CN101849250A (en) * | 2007-09-28 | 2010-09-29 | 检查站系统股份有限公司 | Coiled cable display device |
| JP4768895B1 (en) * | 2010-09-17 | 2011-09-07 | 株式会社エスキューブ | Crime prevention system |
| CN202331692U (en) * | 2011-10-28 | 2012-07-11 | 上海锦为网络科技有限公司 | Anti-theft device for displaying and experiencing cell phone or digital product |
| CN203102498U (en) * | 2013-02-19 | 2013-07-31 | 昆山禾讯电子科技有限公司 | Novel antitheft exhibition rack |
| CN104574738A (en) * | 2013-10-18 | 2015-04-29 | 天津市雅铁科贸有限公司 | Mobile phone pickproof display stand |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110283754A1 (en) * | 2010-05-24 | 2011-11-24 | Checkpoint Systems, Inc. | Security device for ring products |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849250A (en) * | 2007-09-28 | 2010-09-29 | 检查站系统股份有限公司 | Coiled cable display device |
| JP4768895B1 (en) * | 2010-09-17 | 2011-09-07 | 株式会社エスキューブ | Crime prevention system |
| CN202331692U (en) * | 2011-10-28 | 2012-07-11 | 上海锦为网络科技有限公司 | Anti-theft device for displaying and experiencing cell phone or digital product |
| CN203102498U (en) * | 2013-02-19 | 2013-07-31 | 昆山禾讯电子科技有限公司 | Novel antitheft exhibition rack |
| CN104574738A (en) * | 2013-10-18 | 2015-04-29 | 天津市雅铁科贸有限公司 | Mobile phone pickproof display stand |
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