CN2683787Y - Circuit arrangement of electronic lock - Google Patents
Circuit arrangement of electronic lock Download PDFInfo
- Publication number
- CN2683787Y CN2683787Y CN 200420021164 CN200420021164U CN2683787Y CN 2683787 Y CN2683787 Y CN 2683787Y CN 200420021164 CN200420021164 CN 200420021164 CN 200420021164 U CN200420021164 U CN 200420021164U CN 2683787 Y CN2683787 Y CN 2683787Y
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- electronic lock
- circuit
- lock
- control circuit
- control
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Abstract
The utility model provides a circuit arrangement of an electronic lock, comprising a lock control circuit which is composed of a control device, a drive device, an actuating device, a code input device and an information output device, and a power supplying device. The circuit arrangement of an electronic lock also comprises a protection device which is composed of an over-current circuit break device, a voltage detecting device and a switching device. The protection device ensures that the actuating device of the electronic lock can not operate after the strong electricity invades, so the lock is incapable of being unlocked illegally. The utility model has the advantages of simple structure and reliable operation and is capable of effectively preventing the actuating device from being unlocked illegally due to the invasive strong electricity.
Description
Technical field
The utility model relates to a kind of electrical lock apparatus, relates in particular to a kind of electronic lock circuit device that prevents that forceful electric power from unblanking.
Background technology
The existing electronic lock circuit 10 that accesses to your password and unblank, generally form (as shown in Figure 2) by unit such as control device 106, drive unit 108, actuating unit 110, cipher input 102 and information output apparatus 104, wherein control device 106, drive unit 108 and actuating unit 110 are installed in the door, and cipher input 102 and information output apparatus 104 are installed in outdoors as man-machine interface.By cipher input 102 input passwords, by control device 106 recognition codes and control actuating unit 110 and drive the locking mechanisms action, realize unblanking and locking function.Above-mentioned electronic lock component devices or unit are made of common low-voltage electronic device and circuit usually, and they use same battery pack as power supply device 112, and its operating voltage is usually below 10V.
The person has not destroyed cipher input 102 (as keyboard) or information output apparatus 104 (as light emitting diode or charactron) or the electric supply installation 112 (battery pack is contained in situation outdoors) that is installed on the electronic lock panel if illegally unblank, and introduce forceful electric power (direct current or the alternating current that are higher than operating voltage several times and even tens of times) from the connection lead of cipher input 102 or information output apparatus 104 or electric supply installation 112 or electrical nodes, at this moment, drive unit 108 (normally electronic switch) or conducting or breakdown, thus 110 actions of electronic lock actuating unit caused.In this case, lock just is easy to illegally be opened.
Summary of the invention
The utility model provides a kind of electronic lock circuit device, this device except have existing electronic lock password identification, electronic unblank and function such as status information prompting, also have and prevent the function of utilizing heavy current invading illegally to unblank.That is to say that behind heavy current invading, guarantee that the electronic lock actuating unit can not move, lock is not illegally opened.
In aspect one of the present utility model, disclosed a kind of electronic lock circuit device, comprise a lock control circuit and an electric supply installation with actuating unit, described electronic lock circuit device also comprises a protective device, described protective device comprises a switching device and a voltage check device and an overcurrent tripper, described voltage check device is connected between the control utmost point of the power end of described lock control circuit and switching device, be used to detect loop voltage, conducting when applying forceful electric power and surpass the limit value of lock control circuit; Described switching device is connected between the power end and its common ground end of described lock control circuit, be used for when described voltage check device conducting, described switching device conducting with described lock control circuit both end voltage clamp to 1 volt, can't improperly unblank actuating unit; Described overcurrent tripper is connected between described electric supply installation and the described lock control circuit, is used for when applying forceful electric power and cause that this loop current surpasses limit value, and disconnecting circuit is to prevent that forceful electric power from continuing to invade.
Adopt technique scheme, make to the utlity model has following advantage:
Compare with existing electronic lock circuit device, this device has very high security protection performance, and the function of using forceful electric power illegally to unblank that prevents that it had makes the security reliability of the electronic lock that adopts this circuit arrangement be much higher than existing electronic lock.
The protective device circuit structure of electronic lock circuit device is simple, and used components and parts are commonplace components, is easy to realize, can be widely used in various types of electronic password locks.
Description of drawings
Fig. 1 is an example embodiment circuit block diagram of the present utility model.
Fig. 2 is traditional electronic lock circuit block diagram.
The specific embodiment
Illustrate that below with reference to accompanying drawing the utility model is applied to the specific embodiment of strongbox electronic password lock.
As shown in Figure 1; this electronic lock circuit device 20 is made up of lock control circuit, electric supply installation 112 and protective device 200 (in the frame of broken lines shown in Figure 1), and this lock control circuit comprises control device 106, drive unit 108, actuating unit 110, cipher input 102 and information output apparatus 104.Wherein control device 106 comprises one-chip computer (MCU) and nonvolatile memory, wherein MCU adopts known one-chip computer, be built-in with RAM, ROM and I/O mouth 114,115,116 and 117, ROM is built-in with control program, and nonvolatile memory adopts electrically erasable nonvolatile memory (E
2ROM), be used to store the unlocking cipher of setting; Actuating unit 110 adopts electromagnet, also can adopt motor (adopting a direct current electromagnet in the present embodiment), is used to control unblanking and mechanism for locking up of lockset; Drive unit 108 adopts one or one group of switch triode, by break-make control electromagnetic actuation or the motor start-stop and the rotating (adopting a switch triode in the present embodiment) of switch triode; Cipher input 102 adopts numeric keypad, also can adopt intelligent-induction card or cipher inputs such as information button (iB) or fingerprint instrument, is used to receive the information of user's input, as unlocking cipher (adopting numeric keypad in the present embodiment); Information output apparatus 104 can adopt light emitting diode and buzzer or adopt charactron or LCDs (LCDs in the present embodiment), be used for sending information to the user, correct or wrong as password input, lock is opened, brownout must be changed battery or the like.
I/O mouth 114 and the E of MCU
2ROM connects, I/O mouth 117 is connected with the control end of drive unit 108, I/O mouth 115 is connected with cipher input 102 and I/O mouth 116 is connected with information output apparatus 104, by above-mentioned each device that is connected with the I/O mouth of the control of the software program in the ROM, realize functions such as password input, password identification, status information are pointed out and auto-unlocking is locked.
Unit in above-mentioned described lock control circuit and the electric supply installation and structure all are the technology that existing electronic lock circuit device is adopted, be well known to those skilled in the art, and about the realization of functions such as the password input of electronic lock circuit device, password identification, status information prompting and auto-unlocking, also belong to prior art, so be not described at this.The new protective device of introducing 200 in the electronic lock circuit device of the present utility model will be described emphatically below.
With reference to Fig. 1, between electric supply installation 112 and lock control circuit, be mounted with protective device 200, it comprises overcurrent tripper 202, switching device 206 and voltage check device 204.In the present embodiment, overcurrent tripper 202 adopts a known fastp-acting fuse, and parameters such as its blowout current are determined according to the size of actuating unit drive current; Switching device 206 adopts a two-way controllable silicon, and its first end is an anode, and second end is a negative electrode, and the 3rd end is the control utmost point (as adopting one-way SCR, then needing diode of serial connection in electric power loop); Voltage check device 204 adopts a Zener diode, and its first end is a negative electrode, and second end is an anode.The electric supply installation 112 of fastp-acting fuse one termination electronic lock circuit device, the other end is connected with bidirectional triode thyristor anode, voltage-stabiliser tube negative electrode and lock control circuit; Bidirectional triode thyristor is in parallel with the power end and the earth terminal of lock control circuit; The anode of voltage-stabiliser tube is connected with the control utmost point of bidirectional triode thyristor.
Control device 106 (MCU, the E of electronic lock circuit device 20
2ROM), protective device 200 (fastp-acting fuse, bidirectional triode thyristor, voltage-stabiliser tube) and drive unit 108 (switch triode) are contained on the circuit board; Actuating unit 110 (electromagnet or motor) can by the connector on the circuit board be connected lead and be connected with switch triode, also circuit board can be directly installed on the shell of actuating unit 110 (electromagnet or motor), constitute a black box; Keyboard 102 and information output apparatus 104 (light emitting diode, buzzer or charactron or LCDs) by the connector on the foregoing circuit plate be connected lead and be connected with circuit board upper controller 106, electric supply installation 112 also by the connector on the foregoing circuit plate be connected lead and be connected with control device 106, protective device 200 and drive unit 108 on the circuit board.
Foregoing circuit plate and actuating unit 110 are installed in the strongbox, keyboard 102 and information output apparatus 104 are installed on the strongbox shop front as man-machine interface, electric supply installation 112 (being generally battery case) can be installed in the strongbox, also can be installed on the strongbox shop front.
This electronic lock circuit device 20 under normal circumstances because supply voltage is within normal range (NR), the Zener diode of protective device 200 is in reverse blocking state, bidirectional triode thyristor is not triggered and is in the switch off state; Simultaneously since operating current within normal range (NR), fastp-acting fuse can not fuse.The function that electronic lock circuit device 20 realizes normally that password input, password identification, driving are unblanked and electronic lock such as condition prompting should possess.
Usually, forceful electric power is invaded by the outer man-machine interface (as keyboard, light emitting diode or charactron or LCDs and electric supply installation 112 etc.) of safe door, and its possible forceful electric power input can only be following four kinds of situations:
1. between two of electric supply installation 112 outputs;
2.I/O between the common ground end of mouth 115 or I/O mouth 116 and electric supply installation 112 and other devices;
3.I/O between mouth 11 5 or I/O mouth 116 and electric supply installation 112 power ends;
4.I/O between mouth 115 and the I/O mouth 116.
The 1st kind of situation, forceful electric power are applied directly on the series arm of drive unit 108 and actuating unit 110 formations.
The 2nd kind of situation, forceful electric power can puncture I/O mouth 115 or I/O mouth 116.Because in the internal circuit of MCU, be connected to a clamp diode (can referring to the MCU related data) between the power Vcc of each I/O mouth and MCU, after I/O mouth 115 or I/O mouth 116 are breakdown, forceful electric power one end arrives lock control circuit power end by the power Vcc end of clamp diode and MCU, another termination common ground end can be applied on the series arm of drive unit 108 and actuating unit 110 formations equally.
Above-mentioned two kinds of situations, the capital produces same result: the power end voltage of lock control circuit raises, make the terminal voltage of the series arm that the terminal voltage of MCU and drive unit 108 and actuating unit 110 constitute raise, or cause drive unit 108 to puncture, make actuating unit 110 actions; Or cause MCU work undesired, and cause I/O mouth 117 improper output unlocking signals, make actuating unit 110 actions.Therefore, the device 200 that just needs protection prevents the above-mentioned illegal of actuating unit 110.
And the 3rd and the 4 two kind of situation under, the series arm that constitutes because of the obstructed over-driving device of the forceful electric power that applies and actuating unit so can not cause the actuating unit illegal, can only be accepted the I/O mouth 115 of forceful electric power or I/O mouth 116 and puncture or blow.Therefore, device 200 work that do not need protection.
Following with reference to Fig. 1 explanation the 1st with the 2nd kind of situation under when applying different forceful electric power, protective device prevents the operating principle of actuating unit 110 illegals.
1. the forceful electric power of Jia Ruing is the direct current of forward, surpasses limit value (being generally 10V) when the voltage that is applied makes current supply circuit, the Zener diode reverse-conducting in the protective device 200, bidirectional triode thyristor triggering and conducting;
When the forceful electric power that adds be reverse direct current, when the voltage beyond supply voltage 0.3V-0.6V that applied, the Zener diode forward conduction in the protective device 200, bidirectional triode thyristor is triggering and conducting also;
3. the forceful electric power of Jia Ruing is an alternating current; when the voltage that is applied is in positive half cycle instantaneous voltage above current supply circuit voltage limit value; Zener diode reverse-conducting in the protective device 200; the bidirectional triode thyristor triggering and conducting; when the voltage that is applied is in negative half period; Zener diode forward conduction in the protective device 200, bidirectional triode thyristor is triggering and conducting also.
The conducting of bidirectional triode thyristor makes the current supply circuit short circuit of lock control circuit.Because the ON time of Zener diode and bidirectional triode thyristor is the microsecond level, and actuating unit 110 (electromagnet or motor) start-up time is a Millisecond, therefore before actuating unit 110 actions, its both end voltage has been pulled low to 1V following (saturation voltage drop of bidirectional triode thyristor), so can not adhesive maybe can't rotate.Because the current supply circuit of lock control circuit is by short circuit, the very fast fastp-acting fuse blow-out current value that surpasses of current supply circuit electric current makes the fastp-acting fuse quick-break, and forceful electric power can't continue to feed.
Because the breakdown reverse voltage value higher (generally all more than 500V) of forward and reverse breakdown voltage value of bidirectional triode thyristor and voltage-stabiliser tube; be far longer than MCU and I/O mouth thereof; therefore; this electronic lock circuit device is behind heavy current invading; even circuit devcies such as MCU are damaged; protective device also can reliably working, guarantees that actuating unit can not move, thereby effectively the prevention person that illegally unblanks does not use forceful electric power to unblank.
Need explanation; the electrical equipment that each unit adopted in the electronic lock circuit device of the present utility model; these elements that disclosed above being not limited to; electrical equipment and circuit connecting mode that just the utility model adopted are best under existence conditions; therefore; other element that can realize identical function also can be used for the utility model, all belongs to the claimed category of the utility model.
Claims (8)
1. an electronic lock circuit device comprises a lock control circuit and an electric supply installation with actuating unit, it is characterized in that:
Described electronic lock circuit device also comprises a protective device, described protective device comprises a switching device and a voltage check device and an overcurrent tripper, described voltage check device is connected between the control utmost point of the power end of described lock control circuit and switching device, be used to detect loop voltage, conducting when applying forceful electric power and surpass the limit value of lock control circuit; Described switching device is connected between the power end and its common ground end of described lock control circuit, be used for when described voltage check device conducting, described switching device conducting with below described lock control circuit both end voltage clamp to 1 volt, can't improperly unblank actuating unit; Described overcurrent tripper is connected between described electric supply installation and the described lock control circuit, is used for when applying forceful electric power and cause that this loop current surpasses limit value, and disconnecting circuit is to prevent that forceful electric power from continuing to invade.
2. electronic lock circuit device according to claim 1 is characterized in that: described lock control circuit also comprises control device, drive unit, cipher input and information output apparatus; Described control device links to each other with drive unit, actuating unit, cipher input and information output apparatus and according to the input signal of cipher input other device is controlled.
3. electronic lock circuit device according to claim 1 is characterized in that: described overcurrent tripper comprises fastp-acting fuse.
4. electronic lock circuit device according to claim 1 is characterized in that: described voltage check device comprises Zener diode.
5. electronic lock circuit device according to claim 1 is characterized in that: described switching device comprises bidirectional triode thyristor, or serial connection also can adopt one-way SCR during a diode in electric power loop.
6. electronic lock circuit device according to claim 2 is characterized in that: described control device comprises MCU, E
2ROM and I/O mouth are provided with the control program of each device operation of control in the described MCU, described I/O mouth provides and being connected of each device.
7. electronic lock circuit device according to claim 2 is characterized in that: described protective device, control device and drive unit are contained on the same circuit board.
8. electronic lock circuit device according to claim 2 is characterized in that: described cipher input comprises keyboard, intelligent-induction card, information button iB or fingerprint instrument; Described information output apparatus comprises LCDs, charactron, buzzer or light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021164 CN2683787Y (en) | 2004-03-22 | 2004-03-22 | Circuit arrangement of electronic lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021164 CN2683787Y (en) | 2004-03-22 | 2004-03-22 | Circuit arrangement of electronic lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2683787Y true CN2683787Y (en) | 2005-03-09 |
Family
ID=34606820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420021164 Expired - Fee Related CN2683787Y (en) | 2004-03-22 | 2004-03-22 | Circuit arrangement of electronic lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2683787Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354799B (en) * | 2007-07-25 | 2011-01-26 | 株式会社日立制作所 | Electronic lock system |
| CN107358683A (en) * | 2017-06-06 | 2017-11-17 | 柳州市盛景科技有限公司 | A kind of protection gate control system certainly |
-
2004
- 2004-03-22 CN CN 200420021164 patent/CN2683787Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354799B (en) * | 2007-07-25 | 2011-01-26 | 株式会社日立制作所 | Electronic lock system |
| CN107358683A (en) * | 2017-06-06 | 2017-11-17 | 柳州市盛景科技有限公司 | A kind of protection gate control system certainly |
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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: 20050309 Termination date: 20130322 |