CN206115522U - Electronic lock and control circuit thereof - Google Patents
Electronic lock and control circuit thereof Download PDFInfo
- Publication number
- CN206115522U CN206115522U CN201620951167.0U CN201620951167U CN206115522U CN 206115522 U CN206115522 U CN 206115522U CN 201620951167 U CN201620951167 U CN 201620951167U CN 206115522 U CN206115522 U CN 206115522U
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- China
- Prior art keywords
- circuit
- electronic lock
- current
- control circuit
- sampling
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Abstract
The utility model provides an electronic lock and control circuit thereof. A control circuit includes a current sampling circuit, a comparison circuit and a switch circuit at least for controlling the unblanking and locking of electronic lock, wherein the current sampling circuit detects the operating current of electronic lock to export the current value that obtains to comparison circuit, among the comparison circuit, the comparison is carried out to current value and threshold value, if the current value is higher than threshold value, then comparison circuit output signal to switch circuit for switch circuit is broken off, and then the electronic lock stall. The utility model discloses an electronic lock does not need position node information, relies on the electric current size to control merely, compares in traditional electronic lock, has saved the space, can be applied to more occasions.
Description
Technical field
This utility model belongs to electronic lock field, and in particular to a kind of electronic lock and its control circuit.
Background technology
Many electronic locks are controlled for pulsed at present, or adopt permanent high/low Automatic level control, when opening/closing lock signal sends
Afterwards, electronic lock action executing comes to an end after finishing.In the travel switch field that some are driven with motor, generally by the way of
Be position cut-off point install Magnet, tongue tube mode be controlled, when lock core moves to rest position, tongue tube move
Make, the motion mode reversion of lock body.
But, the electronic lock controlled using such scheme, under some special occasions, can be identified for that the Magnet of positional information
Or tongue tube is not easy to install, so as to cause such electronic lock normally cannot use.
The content of the invention
For above-mentioned technical problem, it is contemplated that the motor that is driven to of electronic lock drives, and motor is in normal operation and arrival
The characteristics of size of current during rest position is different, propose that one kind does not need nodes of locations information, rely on merely size of current control
The electronic lock and its control circuit of system.
The utility model proposes a kind of control circuit of electronic lock, the control circuit be used for the unlocking for controlling electronic lock and
Locking, it is characterised in that：The control circuit at least includes a current sampling circuit, a comparison circuit and an on-off circuit；Wherein
The current sampling circuit detects the operating current of electronic lock, and the current value of acquisition is exported to the comparison circuit；Institute
State in comparison circuit, the current value is compared with threshold value, if the current value is higher than threshold value, comparison circuit output signal
To on-off circuit so that on-off circuit is disconnected, and then electronic lock stalling.
Preferably, the control circuit also includes threshold set circuit and sampling current change-over circuit, threshold set circuit
For set threshold voltage signal and it is input into the comparison circuit, sampling current change-over circuit is for current sampling circuit is examined
The electric current for measuring is converted to voltage signal and is input into the comparison circuit.
Preferably, current sampling circuit and on-off circuit are connected on the positive supply of control circuit successively and power branch road
On, the current sampling circuit is made up of some resistor coupled in parallel, and on-off circuit includes a main switching device, and the main switching device is
Field effect transistor.
Preferably, the comparison circuit at least includes a voltage comparator；Threshold set circuit at least includes being serially connected
First resistor and second resistance, the junction point between first resistor and second resistance is connected to the negative input of voltage comparator
End, the positive supply before one end of threshold set circuit is connected current sampling circuit power on branch road, and the other end is connected
Power on branch road in negative supply；Sampling current change-over circuit at least includes 3rd resistor, the 4th resistance being serially connected, and the 3rd is electric
Junction point between resistance and the 4th resistance is connected to the positive input terminal of voltage comparator, one end quilt of sampling current change-over circuit
The positive supply being connected between current sampling circuit and on-off circuit is powered on branch road, and the other end is connected negative supply and powers
Lu Shang.
Preferably, the comparison circuit also includes an audion, and the outfan of the voltage comparator passes through a resistance quilt
The base stage of the audion is connected to, the colelctor electrode of audion is connected to the grid of the field effect transistor, the transmitting of audion
Pole is connected to negative supply and powers branch road, and the outfan of voltage comparator controls the break-make of field effect transistor by the audion.
This utility model also proposed a kind of electronic lock with above-mentioned control circuit.
The beneficial effects of the utility model：Electronic lock of the present utility model can be controlled according to size of current, no longer
Need to arrange Magnet or tongue tube, save space, can be applicable to more occasions.
Description of the drawings
Fig. 1 judges schematic diagram for electronic lock electric current of the present utility model.
Sectional views of the Fig. 2 for electronic lock.
Fig. 3 is the gear position figure under opening.
Fig. 4 is the gear position figure under locking states.
Fig. 5 is electronic lock current-limiting control circuit schematic diagram.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, and which is only used for
This utility model is explained, and it is not intended that to restriction of the present utility model.
Fig. 1 show electronic lock electric current of the present utility model and judges schematic diagram.The electronic lock is mounted with the ratio of an electric current
Compared with circuit, electronic lock internal current size is detected by line, and controls the break-make of electronic lock.In the normal operation row of electronic lock
Journey, the operating current of its motor are less than 100mA, and when which runs to terminal, motor internal current is more than 300mA, special according to this
Point, after electric current is more than 300mA, current comparison circuit is automatically by whole lock body power-off so that dead bolt rests on final position, complete
Press switch to open/close into electronic lock, self-braking process.As shown in figure 1, during ST1 is electronic lock preparation, ST2 is manual
Electronic lock is opened/closes, ST3 is whether electric current is more than 300mA, and ST4 continues rotation lock for motor and continues power supply, and ST5 is motor
The electronic lock that stops operating is stalled.
Fig. 2 show the sectional view of electronic lock.1 is cover plate, and 2 is cross recessed countersunk head sscrew, and 3 is motor, and 4 protect for motor
Set.Fig. 3 show the gear position figure under opening, and Fig. 4 is the gear position figure under locking states, wherein 5 is lock bridge, 6
For little gear, 7 is shell, and after locking signal is received, motor 3 rotates, and the little gear 6 being fixed thereon is while rotation, little tooth
Wheel 6 is stirred lock bridge 5 and rotates to locking states.
Fig. 5 shows electronic lock current-limiting control circuit schematic diagram.As shown in Figure 5 ,+12V power branch for motor and
Before relay branch road is powered, current sampling circuit and field effect transistor Q1 are sequentially connected in series, current sampling circuit includes four simultaneously
Resistance R13, R1, R2, R3 of connection connection；Threshold set circuit include resistance R4, the R5 being serially connected, resistance R4 and resistance R5 it
Between B points be connected to the negative input end of voltage comparator as threshold value input, one end of threshold set circuit is connected electricity
On+12V power branch before stream sample circuit, the other end is connected on -12V power branch；Sampling current change-over circuit
Including resistance R6, R7, R8 for being serially connected, the A points between resistance R6 and resistance R7 are connected as the current value input for detecting
The positive input terminal of voltage comparator is connected to, one end of sampling current change-over circuit is connected current sampling circuit and field effect transistor
Positive supply between Q1 is powered on branch road, and the other end is connected on -12V power branch；The outfan C of voltage comparator passes through
Resistance R9 is connected to the base stage of audion T1, and the colelctor electrode of audion T1 is connected to the grid of field effect transistor Q1, audion
Emitter stage be connected to -12V power branch, the outfan of voltage comparator controls the logical of field effect transistor by audion T1
It is disconnected.
The operation principle of the current-limiting control circuit is as follows：When button S1 is pressed, unlocking relay branch road is powered,
JD1 is by adhesive and self-locking realizes that motor is rotated forward, and carries out unlocking operation；When button S2 is pressed, locking relay branch road is powered,
JD2 is by adhesive and self-locking realizes that motor is inverted, and carries out lock operation；No matter just resistance R13, R1, R2, R3 carry out current sampling,
Turn or invert, because motor is blocked then increases sampling current after motor goes to position, the voltage for further resulting in A points declines,
Before motor lock-rotor, the voltage phase difference about 1V of A points and B points, as the voltage of A points declines, when B point voltages are fallen below, C
Point voltage step-down, so as to field effect transistor Q1 is ended ,+12V power branch power-off；Meanwhile, relay branch road is released because of dead electricity
Put, now A point voltages are raised, field effect transistor Q1 recovers conducting, but as button S1, S2 are lifted, relay coil is obtained not
The failure of self-locking contact is caused to electricity, subsequent operation can only be waited.
Proposed above-mentioned specific implementation is exemplary only, is not intended as to this utility model protection domain
Restriction.Those skilled in the art can make corresponding adjustment as the case may be and change to above-mentioned implementation, these adjustment
Also fall in protection domain of the present utility model with change.
Claims (6)
1. a kind of control circuit of electronic lock, the control circuit are used for the unlocking and locking for controlling electronic lock, it is characterised in that：Should
Control circuit at least includes a current sampling circuit, a comparison circuit and an on-off circuit；Wherein described current sampling circuit inspection
The operating current of electronic lock is surveyed, and the current value of acquisition is exported to the comparison circuit；In the comparison circuit, the electricity
Flow valuve is compared with threshold value, if the current value is higher than threshold value, comparison circuit outputs signal to on-off circuit so that switch
Circuit is disconnected, and then electronic lock stalling.
2. control circuit according to claim 1, it is characterised in that：The control circuit also include threshold set circuit and
Sampling current change-over circuit, threshold set circuit are used for set threshold voltage signal and are input into the comparison circuit, sampling electricity
Stream change-over circuit is converted to voltage signal and is input into the comparison circuit for the electric current for detecting current sampling circuit.
3. control circuit according to claim 2, it is characterised in that：Current sampling circuit and on-off circuit are gone here and there successively
The positive supply for being associated in control circuit is powered on branch road, and the current sampling circuit is made up of some resistor coupled in parallel, on-off circuit bag
A main switching device is included, the main switching device is field effect transistor.
4. control circuit according to claim 3, it is characterised in that：The comparison circuit at least include a voltage ratio compared with
Device；Threshold set circuit at least includes first resistor and the second resistance being serially connected, between first resistor and second resistance
Junction point is connected to the negative input end of voltage comparator, before one end of threshold set circuit is connected current sampling circuit
Positive supply power on branch road, the other end is connected negative supply and powers on branch road；Sampling current change-over circuit at least includes phase
The 3rd resistor of mutual series connection, the 4th resistance, the junction point between 3rd resistor and the 4th resistance are connected to voltage comparator
Positive input terminal, the positive supply that one end of sampling current change-over circuit is connected between current sampling circuit and on-off circuit are powered
On branch road, the other end is connected negative supply and powers on branch road.
5. control circuit according to claim 4, it is characterised in that：The comparison circuit also includes an audion, described
The outfan of voltage comparator is connected to the base stage of the audion by a resistance, and the colelctor electrode of audion is connected to institute
State the grid of field effect transistor, the emitter stage of audion is connected to negative supply and powers branch road, the outfan of voltage comparator passes through
The audion controls the break-make of field effect transistor.
6. a kind of electronic lock, at least with motor, gear, lock bridge, is unlocking with latching process, and motor driven gear wheel rotates,
Gear is stirred lock bridge and rotates to locking states/unlocking condition by unlocking condition/locking states, it is characterised in that：The electronic lock is also
With the control circuit as described in claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620951167.0U CN206115522U (en) | 2016-08-26 | 2016-08-26 | Electronic lock and control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620951167.0U CN206115522U (en) | 2016-08-26 | 2016-08-26 | Electronic lock and control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206115522U true CN206115522U (en) | 2017-04-19 |
Family
ID=58513568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620951167.0U Expired - Fee Related CN206115522U (en) | 2016-08-26 | 2016-08-26 | Electronic lock and control circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206115522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106327640A (en) * | 2016-08-26 | 2017-01-11 | 内蒙古晶新科技有限责任公司 | Electronic lock and the control circuit thereof |
-
2016
- 2016-08-26 CN CN201620951167.0U patent/CN206115522U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106327640A (en) * | 2016-08-26 | 2017-01-11 | 内蒙古晶新科技有限责任公司 | Electronic lock and the control circuit thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20170419 |