CN206863881U - Card reader shell Pickproof alarm system - Google Patents

Abstract

The utility model discloses a kind of card reader shell Pickproof alarm system, solve the problems, such as that card reader causes gate inhibition to fail after being pried open, its drip irrigation device is, including is provided between procapsid, back casing, procapsid and the back casing being mutually permanently connected and is used to detecting whether procapsid to separate and export with back casing the separation detecting device for separating signal and be coupled to separation detecting device and in response to separating signal to keep the in running order control device of electric lock；When separation detecting device detects that procapsid separates with back casing, control device keeps electric lock in running order, card reader shell Pickproof alarm system of the present utility model, can be when the procapsid of card reader be removed from back casing, control electric lock starts to start gate inhibition, and keep electric lock to be in the working condition, avoid being swarmed into by criminal, improve the security of gate inhibition.

Description

Card reader shell Pickproof alarm system

Technical field

It the utility model is related to card reader, more particularly to card reader shell Pickproof alarm system.

Background technology

Access control system is that unidirectional access point is set at public, equipment region important computer room, realizes access and exit control Management.By card close to card reader when holder enters, after legal card signal is by controller certification, electric lock automatically opens up, non- Method card is denied access.As long as pressing exit button when going out, electric lock automatically opens up（Or two-way Card Reader is gone out）.System can be realized The clearly restriction of clamshell doors authority, and the artificial situation that enters of personnel is recorded, in case inquiry.

But it is one and furnishes that they only need to open the shell of card reader for some professional persons, the setting of gate inhibition, Connect two internal wires or using other method, you can positive opening electric lock, so as to realize enabling, so current reading There is potential safety hazard in card device, have certain room for improvement in use.

Utility model content

The purpose of this utility model is to provide a kind of card reader shell Pickproof alarm system, can be beaten in card reader shell Locking electric lock is carried out when opening, avoids gate inhibition from being forced open and cause damage.

Above-mentioned technical purpose of the present utility model technical scheme is that：

A kind of card reader shell Pickproof alarm system, including the procapsid and back casing being mutually permanently connected, the fore shell It is provided between body and back casing and is used to detect whether procapsid separates and export the separation detecting device for separating signal with back casing And it is coupled to separation detecting device and in response to separation signal to keep the in running order control device of electric lock；When described When separation detecting device detects that procapsid separates with back casing, the control device keeps electric lock in running order.

Using such scheme, it is necessary to by procapsid from back casing in criminal carries out unloading process to card reader During dismounting, the state of procapsid and back casing is detected by separation detecting device, if procapsid departs from back casing, Then separation detecting device completes detection, and controls electric lock to start to start gate inhibition by control device, and keeps at electric lock In the working condition, avoid being swarmed into by criminal, improve the security of gate inhibition.

Preferably, the separation detecting device includes microswitch, is arranged on back casing and installed for microswitch Mounting bracket and be arranged on procapsid and procapsid is in back casing when covering state and the action spring of microswitch Piece keeps contradicting to close the conflict axle of microswitch.

Using such scheme, the setting of microswitch make it that design is more simple, easily realizes, in procapsid and rear shell When body keeps covering state, the action reed that conflict axle props up microswitch keeps microswitch to be in closure state, once it is preceding Housing departs from back casing, so as to contradict the action reed that axle no longer contradicts microswitch so that microswitch is opened, so as to root Judged whether to remove procapsid from back casing according to microswitch state in which.

Preferably, the mounting bracket includes the base being fixedly connected with back casing and is integrally connected on base The position-limited rack of shaft position is contradicted for limiting, the position-limited rack is provided with the locating slot that sliding is worn for contradicting axle.

Using such scheme, according to the setting of position-limited rack so that ensure to contradict axle and microswitch in installation process Action reed mutually contradicts, and the situation for avoiding installation from misplacing occurs, and improves integrally-built stability.

Preferably, the opening of the locating slot is positioned at the pin joint side of action reed.

Using such scheme, when procapsid is installed into back casing, it is necessary to which will first contradict axle is inserted into opening for locating slot At mouthful, and gradually move up progressively to contradict axle by action reed pressure, and then microswitch is in closure state, then will Procapsid is installed with back casing fixation with realizing so that total is more reasonable, avoids acting reed and goes out between contradicting axle Situation about now blocking.

Preferably, the separation detecting device includes being used to detect light intensity and the light of output light detection signal Test section, it is preset with light benchmark value signal and is coupled to light test section and believed with receiving light detection signal and detecting light Number it is compared to each other with light benchmark value signal and separates the comparing section of signal to export；When light detection signal is more than light a reference value During signal, the separation signal of the comparing section output high level.

Using such scheme, for procapsid with back casing when covering state, then light between the two is relatively dark, and preceding Housing is with back casing in disassembly status, then light between the two is relatively bright, therefore the light by being arranged between Test section detects to light intensity, and according to comparing section with light detection signal compared with light benchmark value signal it is defeated Go out, realization judges whether procapsid disassembles from back casing.

Preferably, the control device includes being coupled to separation detecting device and in response to separation signal with output control The control unit of signal and it is coupled to control unit and is in starting state in response to control signal to control electric lock to start and keep From lock section.

Such scheme is used, once separation detecting device completes to detect and judge that procapsid and back casing are gone on business released state When, then illustrate now to have illegal molecule in dismounting procapsid or what other situation occur, so directly by being incited somebody to action from lock section Electric lock directly initiates and keeps being in starting state, ensures that illegal molecule can not abolish gate inhibition and enter, ensures the safety of inside.

Preferably, the control device also includes being used to release the dress that automatically resets that electric lock is in locking starting state Put, the automatic reset device includes being coupled to control unit and prolonged in response to control signal with being delayed to export after the set time When signal delay portion and in response to time delayed signal to cut off the cutting portion from lock section current supply circuit.

Using such scheme, automatic reset device resets to self-locking state, avoided according to set delay time Situation about starting from multi-section is caused due to reasons such as equipment faults, realization is automatically reset, and delay time is set according to reality Situation be configured, it is more than hour to be traditionally arranged to be one, avoids the personnel in room from can not being come out from interior.

Preferably, the control device also includes being used to release the hand-reset dress that electric lock is in locking starting state Put, the manual reseting device is reset switch, and the normally-closed contact of reset switch is connected to the current supply circuit from lock section.

Using such scheme, the process of reset can not only be realized by automatic reset device, can also use manual Resetting means is realized, and the manual reseting device is by the way of reset switch so that the operation of reset is simpler, opens and closes multiple Bit switch can be achieved；The reset switch is last reset means simultaneously, only knows reset by wherein several staff The position set is switched, avoids producing unnecessary risk.

Preferably, the control device also includes being used for the alarming device for indicating that electric lock is in locking starting state.

Using such scheme, card reader shell is dismantled to someone and warned, avoids causing unnecessary loss.

Preferably, the alarming device is visual indicator and/or sound indicator.

Using such scheme, visual indicator is to realize by light to prompt staff, and sound instruction Device is then prompted staff by sound, now can be according to different requirements to realize multiple combinations, i.e., only It can also be indicated using visual indicator to carry out instruction only with sound indicator, it can in addition contain using sound Indicator is indicated with the mode that visual indicator is bonded with each other so that it is more reasonable to set, using enhanced convenience.

In summary, the utility model has the advantages that：It can be torn open in the procapsid of card reader from back casing Except when, control electric lock starts to start gate inhibition, and keeps electric lock to be in the working condition, avoids being swarmed into by criminal, carries The security of high gate inhibition.

Brief description of the drawings

Fig. 1 is the system block diagram of card reader shell Pickproof alarm system；

Fig. 2 is the front view of card reader；

Fig. 3 is the sectional view in A-A portions in Fig. 2；

Fig. 4 is the explosive view of card reader；

Fig. 5 is the circuit theory diagrams of embodiment one；

Fig. 6 is the circuit theory diagrams of embodiment two.

In figure：1st, procapsid；2nd, back casing；3rd, separation detecting device；31st, mounting bracket；311st, base；312nd, it is spacing Frame；3121st, locating slot；32nd, axle is contradicted；33rd, light test section；34th, comparing section；4th, control device；41st, control unit；42nd, self-locking Portion；43rd, automatic reset device；431st, delay portion；432nd, cutting portion；44th, manual reseting device；45th, alarming device.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but As long as all protected in right of the present utility model by Patent Law.

Embodiment one, disclosed a kind of card reader shell Pickproof alarm system, as shown in figure 1, including being mutually permanently connected Procapsid 1 and back casing 2, be provided between procapsid 1 and back casing 2 and be used to detect whether procapsid 1 separates simultaneously with back casing 2 The separation detecting device 3 of output separation signal and it is coupled to separation detecting device 3 and in response to separation signal to keep electric lock In running order control device 4；When separation detecting device 3 detects that procapsid 1 separates with back casing 2, control device 4 Keep electric lock in running order.

As shown in Figures 2 to 4, separation detecting device 3 includes microswitch K2, is arranged on back casing 2 and supplies microswitch The mounting bracket 31 of K2 installations and the conflict axle 32 being arranged on procapsid 1；Mounting bracket 31 includes fixing with back casing 2 and connected The base 311 connect and the position-limited rack 312 for being used to limit conflict axle 32 position being integrally connected on base 311, position-limited rack 312 The locating slot 3121 that sliding is worn for contradicting axle 32 is provided with, the opening of locating slot 3121 is positioned at the pin joint one for acting reed Side so that conflict axle 32 is inserted into after the opening of locating slot 3121 gradually progressively to be made to the medial movement of position-limited rack 312 again Axle 32, which must be contradicted, will act reed pressure, and then microswitch K2 is in closure state, while contradict and be located at locating slot on axle 32 3121 downside is provided with the competing limiting plate of inwall with position-limited rack 312, to cause installation more convenient, first by limiting plate It can be installed in place in mobile procapsid 1 after propping up the inwall of position-limited rack 312；Illustrated by above structure in procapsid 1 with after The action reed that housing 2 is in when covering state with microswitch K2 keeps contradicting to close microswitch K2.

As shown in figure 5, separation detecting device 3 also includes being sequentially connected in series in the resistance R31 on microswitch K2, resistance R32, Microswitch K2 wherein one end ground connection, and resistance R32 wherein one end access power supply, the company between resistance R31 and resistance R32 Node output separation signal is connect, i.e., when microswitch K2 is in closure state, exports low level separation signal；Opened in fine motion When pass K2 is in open mode, the separation signal of high level is exported.

Control device 4 includes being coupled to separation detecting device 3 and in response to separation signal with the control of output control signal Portion 41 and it is coupled to control unit 41 and in response to control signal to control electric lock to start and keep the self-locking in starting state Portion 42.

Control unit 41 includes the triode Q1 and relay KM1 of NPN type, and triode Q1 base stage is connected to separation detection dress 3 output end is put to receive separation signal, triode Q1 grounded emitter, triode Q1 colelctor electrode is connected to relay KM1 coil, on relay KM1 coil inverse parallel have sustained diode 1, relay KM1 normally opened contact is connected to self-locking Portion 42 is to control its keying.

Include photo-coupler U2 and relay KM2 from lock section 42, photo-coupler U2 includes light emitting diode and photosensitive three pole Pipe, the anode of light emitting diode are connected to power supply after being connected to relay KM1 normally opened contact, and the negative electrode of light emitting diode connects Ground, and the colelctor electrode of phototriode connects power supply, the transmitting of phototriode after being also connected to relay KM1 normally opened contact Pole is grounded after being connected to relay KM2 coil, relay KM2 normally opened contact and connect with relay KM1 normally opened contact, And relay KM2 normally opened contact is also series on the current supply circuit of electric lock.

Control device 4 also includes being used to release the automatic reset device 43 that electric lock is in locking starting state, automatically resets Device 43 includes being coupled to control unit 41 and in response to control signal to export prolonging for time delayed signal after the set time that is delayed When portion 431 and in response to time delayed signal to cut off the cutting portion 432 from the current supply circuit of lock section 42.

Delay portion 431 includes 555 delay circuits, and the controlled end of 555 delay circuits is coupled to relay KM1 normally opened contact To receive control signal, and time delayed signal is exported, the controlled end of 555 delay circuits is power end, therefore the normally opened of relay KM1 touches Point is connected between power supply and 555 chips, when relay KM1 normally opened contact closure, then provides 555 delay circuit electric energy, After switching on power, because electric capacity C1 is charged, that is, electric current and potential difference be present, so as to ensure the crus secunda of 555 chips High level is in the 6th pin, now the 3rd pin output low level of 555 chips, as electric capacity Cl charges up to charging complete, Do not recharged afterwards because electric capacity is fully charged, therefore electric current and current potential is not present, dc source is obstructed by electric capacity C1, made The current potential of the crus secunda and the 6th pin that obtain 555 chips becomes low level, and the electric signal of output end output is overturn, i.e. output end The signal of output is changed into high level from low level, and is always maintained at down.Diode VD is discharged for electric capacity C2 after power cut-off And set.

Cutting portion 432 includes the triode Q3 and relay KM3 of NPN type, and triode Q3 base stage is connected to 555 delays electricity The output end on road, triode Q3 grounded emitter, triode Q3 collector connection relay KM3 coil, relay KM3 Normally-closed contact be connected between the negative electrode of light emitting diode and ground connection.

Control device 4 also includes being used to release the manual reseting device 44 that electric lock is in locking starting state, hand-reset Device 44 is reset switch K1, and reset switch K1 normally-closed contact is connected to the current supply circuit from lock section 42, i.e. reset switch K1 Normally-closed contact be connected between the negative electrode of light emitting diode and ground connection.

The specific course of work is as follows：

When procapsid 1 disassembles from back casing 2 so that contradict action reed of the axle 32 from microswitch K2 Upper disengaging, i.e. microswitch K2 state are transformed into opening by closing, and then export the separation signal of a high level to three poles Pipe Q1, triode Q1 are turned on, and relay KM1 coil obtains electric, and relay KM1 normally opened contact is closed so that photo-coupler U2 In light emitting diode obtain it is electric be lit, and then phototriode obtains light information and realizes conducting so that relay KM2's Coil obtains electric, relay KM2 normally opened contact closure so that electric lock starts；Simultaneously because relay KM2 normally opened contact closes Close, to cause the light emitting diode in photo-coupler U2 to obtain the whether electric normally opened contact for being no longer controlled by relay KM1, but by The keying situation in relay KM2 normally opened contact is controlled, so realizing the function of self-locking, guard relay by relay KM2 KM2 coil all the time it is electric to keep electric lock in running order.

Automatic reset device 43 control under, i.e., relay KM1 normally opened contact closure after, delay portion 431 start with The time delayed signal of delay one high level of output turns on to triode Q3, triode Q3, and relay KM3 coil obtains electric, relay Device KM3 normally-closed contact is completed to release after disconnecting the time set by cut off the current supply circuit from lock section 42, now passing through in fact The function of locking.

Under the control of manual reseting device 44, by disconnecting after reset switch K1 to cut off the current supply circuit from lock section 42, Realize the function of unlocking manually.

It is separation detecting device 3 in place of embodiment two, with the difference of embodiment one, as shown in fig. 6, in the present embodiment Separation detecting device 3 is including being used to detect the light test section 33 of light intensity and output light detection signal, being preset with light Benchmark value signal and light test section 33 is coupled to receive light detection signal and by light detection signal and light a reference value Signal is compared to each other to export the comparing section 34 of separation signal；When light detection signal is more than light benchmark value signal, compare Portion 34 exports the separation signal of high level.

Light test section 33 includes the photo resistance RL that is serially connected and divider resistance R12, and photo resistance be RL's and partial pressure Connecting node between resistance R12 exports a light detection signal, i.e., when the intensity of illumination in the external world becomes strong, photo resistance RL Resistance reduce, now light detection signal increase；When the intensity of illumination in the external world weakens, photo resistance RL resistance increase, Now light detection signal reduces.

Comparing section 34 is preferably the comparator of LM393A models, and the in-phase end of comparing section 34 is connected to photo resistance RL with dividing For connecting node between piezoresistance R12 to receive light detection signal, end of oppisite phase is connected with default light benchmark value signal, light Line benchmark value signal is set by resistance R21 and resistance R22, by the light detection signal detected and light benchmark value signal phase Mutually relatively, and separation signal is exported, when light detection signal is more than light benchmark value signal, exports the separation signal of high level, When light detection signal is less than light benchmark value signal, low level separation signal is exported；The wherein base of light benchmark value signal The very little that standard is set, as long as there is less intensity of illumination that the separation signal that comparing section 34 exports high level can be achieved.

Specific work process is as follows：

When procapsid 1 disassembles from back casing 2 so that extraneous light is irradiated on bright resistance RL, Photo resistance RL resistance reduces, and now light detection signal increases, and comparing section 34 is according to light detection signal and light benchmark Value signal is compared separation signal that is rear and exporting a high level and turned on to triode Q1, triode Q1, relay KM1's Coil obtain it is electric, the light emitting diode that relay KM1 normally opened contact is closed so that in photo-coupler U2 obtain it is electric be lit, and then Phototriode obtains light information and realizes conducting so that relay KM2 coil obtains electric, relay KM2 normally opened contact Closure so that electric lock starts；Simultaneously because relay KM2 normally opened contact closure, to cause luminous two in photo-coupler U2 Pole pipe obtain it is whether electric be no longer controlled by relay KM1 normally opened contact, and be controllable by the keying of relay KM2 normally opened contact Situation, so realize the function of self-locking by relay KM2, guard relay KM2 coil all the time it is electric to keep at electric lock In working condition.

Automatic reset device 43 control under, i.e., relay KM1 normally opened contact closure after, delay portion 431 start with The time delayed signal of delay one high level of output turns on to triode Q3, triode Q3, and relay KM3 coil obtains electric, relay Device KM3 normally-closed contact is completed to release after disconnecting the time set by cut off the current supply circuit from lock section 42, now passing through in fact The function of locking.

Under the control of manual reseting device 44, by disconnecting after reset switch K1 to cut off the current supply circuit from lock section 42, Realize the function of unlocking manually.

Embodiment three, on the basis of embodiment one or embodiment two, as shown in figs. 5 and 6, control device 4 also includes For indicating that electric lock is in the alarming device 45 of locking starting state, alarming device 45 is visual indicator and/or sound instruction Device, the present embodiment is preferably by the way of visual indicator and sound indicator are warned simultaneously.

Visual indicator includes oscillator, triode Q2 and indicator lamp LED1, and the controlled terminal of oscillator is coupled to relay Power supply is connected after KM2 normally opened contact, the output end of oscillator is coupled to triode Q2 base stage, and controls leading to for triode Q2 Disconnected, triode Q2 colelctor electrode connects power supply after being connected to indicator lamp LED1, triode Q2 grounded emitter, works as relay KM2 coil obtains electric, control relay KM2 normally opened contact closure so that control oscillator operation, exports a control letter Number, control signal is square wave, control triode Q2 alternating break-makes, to cause indicator lamp LED1 discontinuity to indicate, realizes that light is warned The function of showing.

Sound indicator is preferably buzzer H, and buzzer H is series between triode Q2 emitter stage and ground terminal so that After relay KM2 normally opened contact closure, oscillator operation, a control signal is exported, control signal is square wave, control three Pole pipe Q2 replaces break-make, to cause buzzer H discontinuity to turn on, realizes the function of sound warning.

Claims (10)

1. a kind of card reader shell Pickproof alarm system, including the procapsid (1) being mutually permanently connected and back casing (2), it is special Sign is：It is provided with to be used to detecting procapsid (1) between the procapsid (1) and back casing (2) and whether is separated with back casing (2) and defeated Go out to separate the separation detecting device (3) of signal and be coupled to separation detecting device (3) and in response to separation signal with keep electricity Lock in running order control device (4)；When the separation detecting device (3) detects procapsid (1) and back casing (2) point From when, the control device (4) keeps electric lock in running order.

2. card reader shell Pickproof alarm system according to claim 1, it is characterized in that：The separation detecting device (3) Including microswitch, the mounting bracket (31) for being arranged on back casing (2) and being installed for microswitch and it is arranged at procapsid (1) on and procapsid (1) and back casing (2) be in when covering state and the action reed of microswitch keep contradicting it is micro- to close The conflict axle (32) of dynamic switch.

3. card reader shell Pickproof alarm system according to claim 2, it is characterized in that：The mounting bracket (31) includes The base (311) that is fixedly connected with back casing (2) and it is integrally connected to be used to limit conflict axle (32) position on base (311) The position-limited rack (312) put, the position-limited rack (312) are provided with the locating slot (3121) that sliding is worn for contradicting axle (32).

4. card reader shell Pickproof alarm system according to claim 3, it is characterized in that：Locating slot (3121) are opened Positioned at the pin joint side of action reed at mouthful.

5. card reader shell Pickproof alarm system according to claim 1, it is characterized in that：The separation detecting device (3) Including the light test section (33) for detecting light intensity and output light detection signal, be preset with light benchmark value signal and Light test section (33) is coupled to receive light detection signal and mutually compare light detection signal and light benchmark value signal Compared with the comparing section (34) that signal is separated with output；When light detection signal is more than light benchmark value signal, the comparing section (34) the separation signal of high level is exported.

6. card reader shell Pickproof alarm system according to claim 1, it is characterized in that：The control device (4) includes It is coupled to separation detecting device (3) and in response to separating signal with the control unit (41) of output control signal and being coupled to control Portion (41) and in response to control signal to control electric lock to start and keep in starting state from lock section (42).

7. card reader shell Pickproof alarm system according to claim 6, it is characterized in that：The control device (4) is also wrapped The automatic reset device (43) that locking starting state is in for releasing electric lock is included, the automatic reset device (43) includes coupling In control unit (41) and in response to control signal with the set time that is delayed after export time delayed signal delay portion (431) and In response to time delayed signal to cut off the cutting portion (432) from lock section (42) current supply circuit.

8. the card reader shell Pickproof alarm system according to claim 6 or 7, it is characterized in that：The control device (4) is also Manual reseting device (44) including being in locking starting state for releasing electric lock, the manual reseting device (44) are reset Switch, the normally-closed contact of reset switch are connected to the current supply circuit from lock section (42).

9. card reader shell Pickproof alarm system according to claim 6, it is characterized in that：The control device (4) is also wrapped Include for indicating that electric lock is in the alarming device (45) of locking starting state.

10. card reader shell Pickproof alarm system according to claim 9, it is characterized in that：The alarming device (45) is Visual indicator and/or sound indicator.