CN205375732U - Alarm device and because alarm device's notebook computer - Google Patents
Alarm device and because alarm device's notebook computer Download PDFInfo
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- CN205375732U CN205375732U CN201620066921.2U CN201620066921U CN205375732U CN 205375732 U CN205375732 U CN 205375732U CN 201620066921 U CN201620066921 U CN 201620066921U CN 205375732 U CN205375732 U CN 205375732U
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Abstract
The utility model discloses an alarm device and because alarm device's notebook computer belongs to the notebook computer field. The utility model discloses a notebook computer based on alarm device, including fuselage, alarm device and trigger device, the fuselage is including being used for installing the display screen frame of display screen and the keyboard frame that is used for installing the keyboard, alarm device includes switch, wireless switch signal emission device, hall element circuit, electric signal transition amplifier circuit and warning circuit, wherein: wireless switch signal emission device is used for control switch's break -make, and the switch is connected with the input of hall element circuit, and the output of hall element circuit is connected with electric signal transition amplifier circuit's input, and electric signal transition amplifier circuit's output and warning circuit are connected, trigger device includes magnet, and the hall element circuit is located around to this magnet. The utility model mainly provides a notebook computer that an alarm device conceals, alarming reaction is sensitiveer.
Description
Technical field
This utility model relates to notebook computer field, more particularly, it relates to a kind of alarm device and the notebook computer based on alarm device.
Background technology
People, in order to adapt to the mobile environment that uses such as going on business, usually select notebook computer, and notebook computer is advantageous in that than desktop computer, can arbitrarily change use environment, compact, it is simple to carry, notebook computer is because of compact simultaneously, and its price is generally high than desktop computer.
Although notebook computer has portable advantage, but it is also easily stolen because of its compact, the anti-theft technique comparative maturity of current desktop computer, and anti-theft technique for notebook computer is relatively fewer, and because not fixing the position of notebook computer, it is impossible to apply mechanically the alarm device of desktop computer, simultaneously, major part alarm device can only be arranged on the fuselage of notebook computer, is so easily found by thief, causes that thief first releases alarm device and commits theft.
Through retrieval, China Patent No. 2013208264901, authorized announcement date is on June 18th, 2014, invention and created name is: theft alarm for notebook computer, the theft alarm for notebook computer of this application case is made up of the speaker being fixed in shell, controller and vibration sensor, and vibration sensor is electrically connected with speaker by controller；Housing that vibration sensor is provided with mercury bead by inside, at least two pairs of electrodes being fixed in this housing are constituted；This application case aims to provide a kind of alarm that can send acoustic alarm signal when cutting off or moving notebook computer, but alarm is connected with notebook computer by transmission line in this application case, being easy to be found by thief, the stolen risk of notebook computer is still bigger.
China Patent No. 2014201355340, authorized announcement date is on July 30th, 2014, invention and created name is: burglary prevention of laptop alarm, and the burglary prevention of laptop alarm of this application case includes mercoid switch K1, switching signal radiating circuit, switching signal receives circuit, inclination triggers circuit, astable multivibrator and alarming horn BL；Arranging a pair normally opened contact in mercoid switch K1, mercoid switch K1 tilt signals outfan is connected with tilting to trigger circuit tilt signals input；The triggering signal output part of reporting to the police tilting to trigger circuit is connected with the warning triggering signal input part of astable multivibrator；The alarm command outfan of astable multivibrator is connected with the Enable Pin of alarming horn BL；Switching signal radiating circuit sends warning function switch order, and switching signal receives circuit and receives this warning function switch order；The warning function switch order outfan that switching signal receives circuit is connected with the warning function switch order control end tilting to trigger circuit.Although antitheft starting switch is not arranged on the fuselage of notebook in this application case, not easily being found alarm device by thief, but the circuit structure of this application case is more complicated, reaction sensitivity also needs to be improved further.
In sum, how to design the notebook computer that a kind of alarm device is hidden, alarm response is sensitiveer, be the technical barrier needing solution in prior art badly.
Utility model content
1. utility model to solve the technical problem that
The purpose of this utility model is in that to overcome above-mentioned deficiency of the prior art, it is provided that the notebook computer that a kind of alarm device is hidden, alarm response is sensitiveer.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that this utility model provides is:
Alarm device of the present utility model, including switch, wireless switching sender unit, Hall element circuit, signal of telecommunication converter amplifier circuit and warning circuit；Wherein: described wireless switching sender unit switches on-off for control, switch is connected with the input of Hall element circuit, the outfan of Hall element circuit is connected with the input of signal of telecommunication converter amplifier circuit, and the outfan of signal of telecommunication converter amplifier circuit is connected with warning circuit.
Further improving as alarm device of the present utility model, described Hall element circuit includes regulated power supply and Hall element, and described signal of telecommunication converter amplifier circuit includes difference amplifier, Schmidt trigger, audion and relay；
The outfan of regulated power supply respectively with the VCC terminal of Hall element, the VCC terminal of difference amplifier, the VCC terminal of Schmidt trigger is connected, the earth terminal GND of regulated power supply, the earth terminal GND of Hall element, the earth terminal GND of difference amplifier, the earth terminal GND of Schmidt trigger is all connected with the e terminal of audion, output 1 terminal of Hall element is connected on the Vin+ terminal of difference amplifier, output 2 terminals of Hall element are connected on the Vin-terminal of difference amplifier, the Vout terminal of difference amplifier is connected on the Vin terminal of Schmidt trigger, the Q terminal of Schmidt trigger is connected on the b terminal of audion, relay is connected between the c terminal of audion and e terminal.
Further improve as alarm device of the present utility model, described warning circuit includes warning power supply, gang switch, astable multivibrator and alarming horn, and described astable multivibrator includes NE555 time-base integrated circuit IC1, resistance R1, resistance R2, electric capacity C1, electric capacity C2 and electrochemical capacitor C3；
nullThe positive pole of warning power supply connects one end of resistance R1 respectively、4 feet of NE555 time-base integrated circuit IC1、8 feet，The other end of resistance R1 respectively with 7 feet of NE555 time-base integrated circuit IC1、One end of resistance R2 connects，The other end of resistance R2 respectively with 2 feet of NE555 time-base integrated circuit IC1、One end of 6 feet and electric capacity C1 connects，5 feet of NE555 time-base integrated circuit IC1 are connected with one end of electric capacity C2，3 feet of NE555 time-base integrated circuit IC1 are connected with the positive pole of electrochemical capacitor C3，The negative pole of electrochemical capacitor C3 is connected with the positive terminal of alarming horn，The negative pole of warning power supply passes through gang switch ground connection，The negative pole end of alarming horn、The other end of electric capacity C2、1 foot of NE555 time-base integrated circuit IC1 and the equal ground connection of the other end of electric capacity C1.
Further improving as alarm device of the present utility model, one end of described switch is connected with the power supply of 12V, and the other end of switch is connected with the input of regulated power supply by reversal protector.
Notebook computer based on alarm device of the present utility model, including fuselage, described fuselage includes the display screen frame for installing display screen and for installing the keyboard frame of keyboard, also includes alarm device and triggers device；
Described alarm device includes switch, wireless switching sender unit, Hall element circuit, signal of telecommunication converter amplifier circuit and warning circuit；Wherein: described wireless switching sender unit switches on-off for control, switch is connected with the input of Hall element circuit, the outfan of Hall element circuit is connected with the input of signal of telecommunication converter amplifier circuit, and the outfan of signal of telecommunication converter amplifier circuit is connected with warning circuit；
Described triggering device includes Magnet, and this Magnet is located at around Hall element circuit.
Further improve as the notebook computer based on alarm device of the present utility model, described Hall element circuit includes regulated power supply and Hall element, and described signal of telecommunication converter amplifier circuit includes difference amplifier, Schmidt trigger, audion and relay；
The outfan of regulated power supply respectively with the VCC terminal of Hall element, the VCC terminal of difference amplifier, the VCC terminal of Schmidt trigger is connected, the earth terminal GND of regulated power supply, the earth terminal GND of Hall element, the earth terminal GND of difference amplifier, the earth terminal GND of Schmidt trigger is all connected with the e terminal of audion, output 1 terminal of Hall element is connected on the Vin+ terminal of difference amplifier, output 2 terminals of Hall element are connected on the Vin-terminal of difference amplifier, the Vout terminal of difference amplifier is connected on the Vin terminal of Schmidt trigger, the Q terminal of Schmidt trigger is connected on the b terminal of audion, relay is connected between the c terminal of audion and e terminal.
Further improve as the notebook computer based on alarm device of the present utility model, described warning circuit includes warning power supply, gang switch, astable multivibrator and alarming horn, and described astable multivibrator includes NE555 time-base integrated circuit IC1, resistance R1, resistance R2, electric capacity C1, electric capacity C2 and electrochemical capacitor C3；
nullThe positive pole of warning power supply connects one end of resistance R1 respectively、4 feet of NE555 time-base integrated circuit IC1、8 feet，The other end of resistance R1 respectively with 7 feet of NE555 time-base integrated circuit IC1、One end of resistance R2 connects，The other end of resistance R2 respectively with 2 feet of NE555 time-base integrated circuit IC1、One end of 6 feet and electric capacity C1 connects，5 feet of NE555 time-base integrated circuit IC1 are connected with one end of electric capacity C2，3 feet of NE555 time-base integrated circuit IC1 are connected with the positive pole of electrochemical capacitor C3，The negative pole of electrochemical capacitor C3 is connected with the positive terminal of alarming horn，The negative pole of warning power supply passes through gang switch ground connection，The negative pole end of alarming horn、The other end of electric capacity C2、1 foot of NE555 time-base integrated circuit IC1 and the equal ground connection of the other end of electric capacity C1.
Further improving as the notebook computer based on alarm device of the present utility model, one end of described switch is connected with the power supply of 12V, and the other end of switch is connected with the input of regulated power supply.
Further improving as the notebook computer based on alarm device of the present utility model, the other end of described switch is connected with the input of regulated power supply by reversal protector.
Further improve as the notebook computer based on alarm device of the present utility model, described Magnet has two, two Magnet respectively go up Magnet, lower magnet, described upper Magnet is fixed on display screen frame, described lower magnet is positioned on the keyboard frame relative with upper Magnet position, and the surrounding of lower magnet is provided with Hall element.
3. beneficial effect
The technical scheme adopting this utility model to provide, compared with prior art, has the advantages that
(1) in this utility model, Hall element in Hall element circuit is for sensing the changes of magnetic field of surrounding, when the notebook person of being tampered closes, it is positioned at the upper Magnet on display screen frame and the lower magnet being positioned on keyboard frame can contact with each other, due to interfering of magnetic field, Hall element around lower magnet can experience the change in magnetic field, judge that notebook is closed by the change in magnetic field, good anti-theft function can be played, once notebook is closed without reason by stranger, can sending chimes of doom by alarming horn at once, alarm response is sensitiveer.
(2) in this utility model, by completely set up for alarm device in fuselage interior, can only arranging Magnet at fuselage surface, not easily found alarm device by thief, the disguise of alarm device is higher, uses more reliable；In this utility model, manual operation wireless switching sender unit, it is convenient to open/close alarm device, use convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of the notebook computer based on alarm device of embodiment 1；
Fig. 2 is the theory diagram of alarm device in embodiment 1；
Fig. 3 is the circuit theory diagrams of alarm device in embodiment 1；
Fig. 4 is the structural representation of the notebook computer based on alarm device of embodiment 2.
Label declaration in schematic diagram: 101, upper Magnet；102, lower magnet；2, display screen frame；3, keyboard frame；4, base.
Detailed description of the invention
For further appreciating that content of the present utility model, in conjunction with the accompanying drawings and embodiments this utility model is described in detail.
Embodiment 1
In conjunction with Fig. 1～3, the notebook computer based on alarm device of the present embodiment, including fuselage, alarm device and triggering device；Fuselage includes the display screen frame 2 for installing display screen and for installing the keyboard frame 3 of keyboard.Alarm device includes switch S, wireless switching sender unit WSSLD, Hall element circuit, signal of telecommunication converter amplifier circuit and warning circuit；Wherein: wireless switching sender unit WSSLD is for controlling the break-make of switch S, switch S is connected with the input of Hall element circuit, the outfan of Hall element circuit is connected with the input of signal of telecommunication converter amplifier circuit, and the outfan of signal of telecommunication converter amplifier circuit is connected with warning circuit.Triggering device and include Magnet, this Magnet is located at around Hall element circuit.
Particularly as follows: Hall element circuit includes regulated power supply RVS and Hall element HE, signal of telecommunication converter amplifier circuit includes difference amplifier TDA, Schmidt trigger ST, audion VT and relay K；nullThe outfan of regulated power supply RVS respectively with the VCC terminal of Hall element HE、The VCC terminal of difference amplifier TDA、The VCC terminal of Schmidt trigger ST is connected，The earth terminal GND of regulated power supply RVS、The earth terminal GND of Hall element HE、The earth terminal GND of difference amplifier TDA、The earth terminal GND of Schmidt trigger ST is all connected with the e terminal of audion VT，Output 1 terminal of Hall element HE is connected on the Vin+ terminal of difference amplifier TDA，Output 2 terminals of Hall element HE are connected on the Vin-terminal of difference amplifier TDA，The Vout terminal of difference amplifier TDA is connected on the Vin terminal of Schmidt trigger ST，The Q terminal of Schmidt trigger ST is connected on the b terminal of audion VT，Relay K is connected between the c terminal of audion VT and e terminal.Warning circuit includes warning power supply DC, gang switch K1, astable multivibrator and alarming horn BL, and astable multivibrator includes NE555 time-base integrated circuit IC1, resistance R1, resistance R2, electric capacity C1, electric capacity C2 and electrochemical capacitor C3；nullThe positive pole of warning power supply DC connects one end of resistance R1 respectively、4 feet of NE555 time-base integrated circuit IC1、8 feet，The other end of resistance R1 respectively with 7 feet of NE555 time-base integrated circuit IC1、One end of resistance R2 connects，The other end of resistance R2 respectively with 2 feet of NE555 time-base integrated circuit IC1、One end of 6 feet and electric capacity C1 connects，5 feet of NE555 time-base integrated circuit IC1 are connected with one end of electric capacity C2，3 feet of NE555 time-base integrated circuit IC1 are connected with the positive pole of electrochemical capacitor C3，The negative pole of electrochemical capacitor C3 is connected with the positive terminal of alarming horn BL，The negative pole of warning power supply DC passes through gang switch K1 ground connection，The negative pole end of alarming horn BL、The other end of electric capacity C2、1 foot of NE555 time-base integrated circuit IC1 and the equal ground connection of the other end of electric capacity C1.One end of switch S is connected with the power supply V of 12V, and the other end of switch S is connected by the input of reversal protector SPD and regulated power supply RVS, and reversal protector SPD plays circuit protection effect.In the present embodiment, Magnet has two, and two Magnet respectively go up Magnet 101, lower magnet 102, and upper Magnet 101 is fixed on display screen frame 2, lower magnet 102 is positioned on the keyboard frame 3 relative with upper Magnet 101 position, and the surrounding of lower magnet 102 is provided with Hall element HE.
nullThe notebook computer based on alarm device of the present embodiment，Its work process is: people are before away from notebook computer，Only need to start wireless switching sender unit WSSLD，Control switch S Guan Bi，Now alarm device is started working，The notebook as long as stealer closes when stealing，Upper Magnet 101 and lower magnet 102 are close together，Magnetic field around lower magnet 102 can change，Hall element HE can detect the change in now magnetic field，Under the effect of signal of telecommunication converter amplifier circuit，The change transitions in above-mentioned magnetic field becomes the signal of telecommunication amplified，This signal of telecommunication controls relay K adhesive，Due to gang switch K1 and relay K interlocked control，Now gang switch K1 closes automatically，Warning circuit is energized，Alarming horn BL begins to send out chimes of doom and plays warning function，Prevent notebook computer stolen.
In the present embodiment, Hall element HE in Hall element circuit is for sensing the changes of magnetic field of surrounding, when the notebook person of being tampered closes, it is positioned at the upper Magnet 101 on display screen frame 2 and the lower magnet 102 being positioned on keyboard frame 3 can contact with each other, due to interfering of magnetic field, Hall element HE around lower magnet 102 can experience the change in magnetic field, judge that notebook is closed by the change in magnetic field, good anti-theft function can be played, once notebook is closed without reason by stranger, chimes of doom can be sent at once by alarming horn BL, alarm response is sensitiveer.
In the present embodiment, by completely set up for alarm device in fuselage interior, can only arranging Magnet at fuselage surface, not easily found alarm device by thief, the disguise of alarm device is higher, uses more reliable；Alarm device can also being separately set in external fuselage, now the power supply V in alarm device uses encapsulation battery, even if stealer finds that alarm device is also difficult to take off battery, the reliability of this alarm device is higher.
In the present embodiment, manual operation wireless switching sender unit WSSLD, it is convenient to open/close alarm device, use convenient.
It should be noted that this utility model also includes a kind of alarm device, the notebook computer based on alarm device of embodiment 1, it includes alarm device, is therefore described in detail for alarm device in embodiment 1, not repeat specification herein；In addition, alarm device of the present utility model, as long as being placed on the environment around with magnetic field, once the magnetic field around alarm device changes, namely this alarm device can send chimes of doom delicately, therefore, alarm device of the present utility model can be used for any around with magnetic field, and react the occasion of surrounding magnetic field change by sending chimes of doom.
Embodiment 2
In conjunction with Fig. 4, the notebook computer based on alarm device of the present embodiment, its basic structure is identical with embodiment 1, it is different in that: also include the base 4 placing fuselage, this base 4 upper surface center is provided with a Magnet, and Hall element HE is located at the bottom surface (not including Magnet 101 and lower magnet 102 in the present embodiment) of keyboard frame 3.
In the present embodiment, owing to fuselage is placed on base 4, base 4 upper surface center is provided with a Magnet, when notebook computer is motionless, the magnetic field that the Hall element HE that keyboard frame 3 bottom surface is arranged senses is constant, when the notebook person of being tampered takes away, Hall element HE is away from the Magnet of base 4 upper surface, now Hall element HE can experience the change in magnetic field, judge that notebook is taken away from base 4 by the change in magnetic field, good anti-theft function can be played, once notebook is taken away from base 4 by stranger, chimes of doom can be sent at once by alarming horn BL, alarm response is sensitiveer.
Schematically this utility model and embodiment thereof being described above, this description does not have restricted, and shown in accompanying drawing is also one of embodiment of the present utility model, and actual structure is not limited thereto.So, if those of ordinary skill in the art is enlightened by it, when creating objective without departing from this utility model, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (10)
1. an alarm device, it is characterised in that: include switch, wireless switching sender unit, Hall element circuit, signal of telecommunication converter amplifier circuit and warning circuit；Wherein: described wireless switching sender unit switches on-off for control, switch is connected with the input of Hall element circuit, the outfan of Hall element circuit is connected with the input of signal of telecommunication converter amplifier circuit, and the outfan of signal of telecommunication converter amplifier circuit is connected with warning circuit.
2. alarm device according to claim 1, it is characterised in that: described Hall element circuit includes regulated power supply and Hall element, and described signal of telecommunication converter amplifier circuit includes difference amplifier, Schmidt trigger, audion and relay；
The outfan of regulated power supply respectively with the VCC terminal of Hall element, the VCC terminal of difference amplifier, the VCC terminal of Schmidt trigger is connected, the earth terminal GND of regulated power supply, the earth terminal GND of Hall element, the earth terminal GND of difference amplifier, the earth terminal GND of Schmidt trigger is all connected with the e terminal of audion, output 1 terminal of Hall element is connected on the Vin+ terminal of difference amplifier, output 2 terminals of Hall element are connected on the Vin-terminal of difference amplifier, the Vout terminal of difference amplifier is connected on the Vin terminal of Schmidt trigger, the Q terminal of Schmidt trigger is connected on the b terminal of audion, relay is connected between the c terminal of audion and e terminal.
3. alarm device according to claim 2, it is characterized in that: described warning circuit includes warning power supply, gang switch, astable multivibrator and alarming horn, described astable multivibrator includes NE555 time-base integrated circuit IC1, resistance R1, resistance R2, electric capacity C1, electric capacity C2 and electrochemical capacitor C3；
nullThe positive pole of warning power supply connects one end of resistance R1 respectively、4 feet of NE555 time-base integrated circuit IC1、8 feet，The other end of resistance R1 respectively with 7 feet of NE555 time-base integrated circuit IC1、One end of resistance R2 connects，The other end of resistance R2 respectively with 2 feet of NE555 time-base integrated circuit IC1、One end of 6 feet and electric capacity C1 connects，5 feet of NE555 time-base integrated circuit IC1 are connected with one end of electric capacity C2，3 feet of NE555 time-base integrated circuit IC1 are connected with the positive pole of electrochemical capacitor C3，The negative pole of electrochemical capacitor C3 is connected with the positive terminal of alarming horn，The negative pole of warning power supply passes through gang switch ground connection，The negative pole end of alarming horn、The other end of electric capacity C2、1 foot of NE555 time-base integrated circuit IC1 and the equal ground connection of the other end of electric capacity C1.
4. alarm device according to claim 3, it is characterised in that: one end of described switch is connected with the power supply of 12V, and the other end of switch is connected with the input of regulated power supply by reversal protector.
5. the notebook computer based on alarm device, including fuselage, described fuselage includes the display screen frame (2) for installing display screen and for installing the keyboard frame (3) of keyboard, it is characterised in that: also include alarm device and trigger device；
Described alarm device includes switch, wireless switching sender unit, Hall element circuit, signal of telecommunication converter amplifier circuit and warning circuit；Wherein: described wireless switching sender unit switches on-off for control, switch is connected with the input of Hall element circuit, the outfan of Hall element circuit is connected with the input of signal of telecommunication converter amplifier circuit, and the outfan of signal of telecommunication converter amplifier circuit is connected with warning circuit；
Described triggering device includes Magnet, and this Magnet is located at around Hall element circuit.
6. the notebook computer based on alarm device according to claim 5, it is characterized in that: described Hall element circuit includes regulated power supply and Hall element, and described signal of telecommunication converter amplifier circuit includes difference amplifier, Schmidt trigger, audion and relay；
The outfan of regulated power supply respectively with the VCC terminal of Hall element, the VCC terminal of difference amplifier, the VCC terminal of Schmidt trigger is connected, the earth terminal GND of regulated power supply, the earth terminal GND of Hall element, the earth terminal GND of difference amplifier, the earth terminal GND of Schmidt trigger is all connected with the e terminal of audion, output 1 terminal of Hall element is connected on the Vin+ terminal of difference amplifier, output 2 terminals of Hall element are connected on the Vin-terminal of difference amplifier, the Vout terminal of difference amplifier is connected on the Vin terminal of Schmidt trigger, the Q terminal of Schmidt trigger is connected on the b terminal of audion, relay is connected between the c terminal of audion and e terminal.
7. the notebook computer based on alarm device according to claim 6, it is characterized in that: described warning circuit includes warning power supply, gang switch, astable multivibrator and alarming horn, described astable multivibrator includes NE555 time-base integrated circuit IC1, resistance R1, resistance R2, electric capacity C1, electric capacity C2 and electrochemical capacitor C3；
nullThe positive pole of warning power supply connects one end of resistance R1 respectively、4 feet of NE555 time-base integrated circuit IC1、8 feet，The other end of resistance R1 respectively with 7 feet of NE555 time-base integrated circuit IC1、One end of resistance R2 connects，The other end of resistance R2 respectively with 2 feet of NE555 time-base integrated circuit IC1、One end of 6 feet and electric capacity C1 connects，5 feet of NE555 time-base integrated circuit IC1 are connected with one end of electric capacity C2，3 feet of NE555 time-base integrated circuit IC1 are connected with the positive pole of electrochemical capacitor C3，The negative pole of electrochemical capacitor C3 is connected with the positive terminal of alarming horn，The negative pole of warning power supply passes through gang switch ground connection，The negative pole end of alarming horn、The other end of electric capacity C2、1 foot of NE555 time-base integrated circuit IC1 and the equal ground connection of the other end of electric capacity C1.
8. the notebook computer based on alarm device according to claim 7, it is characterised in that: one end of described switch is connected with the power supply of 12V, and the other end of switch is connected with the input of regulated power supply.
9. the notebook computer based on alarm device according to claim 8, it is characterised in that: the other end of described switch is connected with the input of regulated power supply by reversal protector.
10. the notebook computer based on alarm device according to claim 9, it is characterized in that: described Magnet has two, two Magnet respectively go up Magnet (101), lower magnet (102), described upper Magnet (101) is fixed on display screen frame (2), described lower magnet (102) is positioned on the keyboard frame (3) relative with upper Magnet (101) position, and the surrounding of lower magnet (102) is provided with Hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620066921.2U CN205375732U (en) | 2016-01-22 | 2016-01-22 | Alarm device and because alarm device's notebook computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620066921.2U CN205375732U (en) | 2016-01-22 | 2016-01-22 | Alarm device and because alarm device's notebook computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205375732U true CN205375732U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620066921.2U Expired - Fee Related CN205375732U (en) | 2016-01-22 | 2016-01-22 | Alarm device and because alarm device's notebook computer |
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| Country | Link |
|---|---|
| CN (1) | CN205375732U (en) |
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2016
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20170122 |