A control circuit and electromagnetic lock door based on magnetic lock and motor linkage

Abstract

The utility model relates to the field of electromagnetic lock driving technology, and in particular to a control circuit and an electromagnetic lock door based on the linkage between a magnetic lock and a motor. The control circuit includes a magnetic lock switch control circuit: including an unlocking signal, a first relay and a magnetic lock, and the unlocking signal controls the first relay to provide power for the magnetic lock; a feedback circuit: using two optocoupler chips to convert the level and output the magnetic lock and travel switch feedback signals; a magnetic lock and motor logic circuit: judging the magnetic lock switch state according to the magnetic lock and travel switch feedback signals, and outputting the motor control signal; a motor control circuit: including a motor interface, a second relay and a third relay, and the second relay and the third relay control the extension and retraction of the motor. A battery charging and discharging circuit: including a battery input port, a battery output port and a battery. The control circuit of the utility model is applied to an electromagnetic lock door in which a motor and a magnetic lock are linked, which effectively solves the deficiencies of the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic lock driving, in particular to a control circuit based on the linkage between a magnetic lock and a motor. Background Art

[0002] The existing electronic equipment door lock selection is mainly some express locks and mechanical locks. Express locks are small in size and simple in design, but they are easy to be damaged due to long power-on time. Other electronic locks also need to manually buckle the door into the lock before they can work, so they are not suitable for larger doors. Single electric suction locks also have the problem of difficulty in triggering the electric suction when closing the door, and it is difficult to seal the cabinet door after closing. Mechanical locks have gradually fallen behind the times and have the disadvantage of requiring a key to open, which does not meet people's needs for intelligent management.

[0003] However, as a substitute for conventional electronic locks, electromagnetic locks have the advantage of only requiring the door body to be in contact with the lock body to be adsorbed, and the lock body is usually an embedded structure with a flat surface, and does not require a hole to expose the lock tongue like a conventional lock. It is beautiful and easy to install. However, existing electromagnetic locks have the disadvantages that the magnetic attraction needs to be kept powered on and the door body needs to be opened in time, otherwise it will be adsorbed again. Utility Model Content

[0004] In order to solve the above technical problems of the existing electromagnetic locks, the utility model provides a control circuit and an electromagnetic lock door based on the linkage between a magnetic lock and a motor.

[0005] In order to achieve the above object, the utility model provides the following technical solution: a control circuit based on the linkage between a magnetic lock and a motor, wherein the magnetic lock is fixedly connected to the motor, comprising:

[0006] Magnetic lock switch control circuit: includes an unlocking signal, a first relay and a magnetic lock, and controls the first relay to provide power to the magnetic lock through the unlocking signal;

[0007] Feedback circuit: Use two optocoupler chips to convert the level, input the magnetic lock input signal and the travel switch input signal, and output the magnetic lock feedback signal and the travel switch feedback signal;

[0008] Magnetic lock and motor logic circuit: according to the feedback signal of the magnetic lock and the feedback signal of the travel switch, the switch state of the magnetic lock is judged, and the motor control signal is output;

[0009] Motor control circuit: includes a motor interface, a second relay and a third relay, wherein the second relay and the third relay control the extension and retraction of the motor and simultaneously control the extension and retraction of the magnetic lock.

[0010] The battery charging and discharging circuit includes a battery input port, a battery output port and a battery. The first relay controls the charging and discharging of the battery.

[0011] The battery charging and discharging circuit is connected to the magnetic lock switch control circuit, the magnetic lock switch control circuit is connected to the feedback circuit, the feedback circuit is connected to the magnetic lock and motor logic circuit, and the magnetic lock and motor logic circuit is connected to the motor control circuit.

[0012] Preferably, the control ends of the first relay, the second relay and the third relay are all provided with freewheeling diodes.

[0013] Preferably, the levels of the magnetic lock input signal and the travel switch input signal are switched between 0 and 12V, and the levels of the magnetic lock feedback signal and the travel switch feedback signal are switched between 0 and 5V.

[0014] Preferably, the magnetic lock switch control circuit includes a first resistor and a second resistor. The magnetic lock is connected to the first resistor when powered on, and is connected to the second resistor when powered off.

[0015] Preferably, the motor control circuit also includes a motor extension indicator light and a motor retraction indicator light.

[0016] Preferably, the motor control circuit also includes an emergency unlocking interface.

[0017] Preferably, an anti-reverse diode and a voltage-stabilizing diode are provided at both ends of the battery.

[0018] Preferably, the voltage of the voltage zener diode is 13V.

[0019] In order to solve the technical problem, the utility model also provides an electromagnetic lock door, which includes a magnetic lock, a motor, a travel switch and the control circuit based on the linkage between the magnetic lock and the motor as described above, and the magnetic lock is fixedly connected to the motor.

[0020] By implementing the above technical solution, the control circuit and electromagnetic lock door based on the linkage between the magnetic lock and the motor provided by the utility model have the following technical effects:

[0021] 1. The four circuits of feedback circuit, magnetic lock switch control circuit, battery charging circuit and motor control circuit are processed through the feedback signal of the magnetic lock, the feedback signal of the travel switch and the motor control signal, and finally realize the linkage between the magnetic lock and the motor. When the unlocking signal is sent, the magnetic lock will be powered off, the motor will be pushed out, and the magnetic lock will be pushed out with the motor. When the feedback signal of the magnetic lock is in a low level state, the control signal is also in a low level state, so that the motor drives the magnetic lock to retract.

[0022] 2. With a backup battery charging and discharging circuit, the magnetic lock can keep working normally even after power failure: The control circuit provided by the utility model adds a battery charging and discharging circuit to charge the backup battery when the main power is normal. When the main power is disconnected, it will quickly switch to the backup battery for power supply to avoid magnetic failure.

[0023] 3. Simplify software control logic and effectively save IO ports: The control circuit is mainly used in door lock systems with motors and magnetic locks linked together. The motor and magnetic lock need to be controlled at the same time. Through this control circuit, only one IO port is needed as a control signal to control the operation of the motor and the magnetic lock. Another IO port is used as the feedback signal of the door (usually the travel switch feedback signal). The linkage between the motor and the magnetic lock can be realized in the form of a hardware circuit. The software only needs two IO ports, which greatly simplifies the software control logic.

[0024] 4. High safety and reliability: On the one hand, the relay control end in the circuit is equipped with a freewheeling diode to effectively protect the front-end control circuit; on the other hand, an anti-reverse diode and a voltage-stabilizing diode are added to the battery charging end as overvoltage protection. The control signal and the feedback signal are isolated by an optocoupler device to prevent the abnormality of the back-end circuit from affecting the front-end processor.

[0025] 5. Strong maintainability: The motor control circuit has a motor extension indicator light and a motor retraction indicator light to prompt the working status of the motor, which is convenient for finding problems. There is also an emergency unlocking interface. When the magnetic lock remains adsorbed and cannot be controlled, the emergency unlocking interface can be short-circuited with the ground wire of the control panel through an external switch to forcibly disconnect the power supply of the magnetic lock to achieve emergency door opening.

[0026] 6. The electromagnetic door lock provided by the utility model is applied to the control circuit described above by fixing the structure of the motor and the magnetic lock. In actual use, the magnetic lock can be pushed out to open the door when opening the door, preventing the user from opening the door in time and the magnetic lock sucking the door body again. When closing the door, when the magnetic lock sucks the door tightly, the motor will retract and tighten the door to make the door body close to the door frame, which is suitable for environments that require high airtightness. The travel switch is to obtain the signal whether the door body is closed. Adjust the position of the travel switch. When the travel switch is triggered, the control board will control the motor to stop retracting to avoid damage caused by continuous retraction of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A connection block diagram of a control circuit based on the linkage between a magnetic lock and a motor provided in the first embodiment of the utility model;

[0028] Figure 2 A magnetic lock switch control circuit diagram based on a control circuit for a magnetic lock and a motor linkage provided in the first embodiment of the utility model;

[0029] Figure 3 A feedback circuit diagram of a control circuit based on the linkage between a magnetic lock and a motor provided in the first embodiment of the utility model;

[0030] Figure 4 A magnetic lock and motor logic circuit diagram based on a control circuit for linkage between a magnetic lock and a motor provided in the first embodiment of the utility model;

[0031] Figure 5 A motor control circuit diagram of a control circuit based on a magnetic lock and a motor linkage provided in the first embodiment of the utility model;

[0032] Figure 6 A battery charging and discharging circuit based on a control circuit of a magnetic lock and a motor linkage is provided in the first embodiment of the utility model.

[0033] Figure 7 A connection diagram of a magnetic lock and a motor for an electromagnetic door lock provided in the second embodiment of the utility model;

[0034] Figure 8 A schematic structural diagram of an electromagnetic door lock provided in the second embodiment of the utility model.

[0035] Description of the accompanying drawings:

[0036] 1. Magnetic lock; 2. Motor; 3. Travel switch; 4. Metal block. DETAILED DESCRIPTION

[0037] In order to better understand the technical solution of the present utility model, the embodiments provided by the present utility model are described in detail below with reference to the accompanying drawings.

[0038] See also Figure 1-5 The present utility model embodiment provides a control circuit based on the linkage between a magnetic lock and a motor, wherein the magnetic lock is fixedly connected to the motor, and includes:

[0039] Magnetic lock switch control circuit: includes unlocking signal OUT1, first relay K4 and magnetic lock LOCK, and controls the first relay K4 to provide power to the magnetic lock through the unlocking signal OUT1;

[0040] Feedback circuit: Use two optocoupler chips Q2 to convert the level, input the magnetic lock input signal GPI1 and the travel switch input signal GPI2, and output the magnetic lock feedback signal X2 and the travel switch feedback signal X3;

[0041] Magnetic lock and motor logic circuit: According to the magnetic lock feedback signal X2 and the travel switch feedback signal X3, the switch state of the magnetic lock is judged, and the motor control signal A2 is output;

[0042] Motor control circuit: includes motor interface M1, second relay K2 and third relay K3. Second relay K2 and third relay K3 control the extension and retraction of the motor. The motor is fixedly connected to the magnetic lock, thus controlling the extension and retraction of the magnetic lock at the same time.

[0043] Battery charging and discharging circuit: includes a battery input port, a battery output port and a battery VIN, wherein the battery input port and the battery output port are the same interface J1, and the first relay K4 controls the charging and discharging of the battery VIN.

[0044] Among them, the battery charging and discharging circuit is connected to the magnetic lock switch control circuit, the magnetic lock switch control circuit is connected to the feedback circuit, the feedback circuit is connected to the magnetic lock and motor logic circuit, and the magnetic lock and motor logic circuit is connected to the motor control circuit.

[0045] Therefore, the four circuits provided by the utility model, namely the feedback circuit, the magnetic lock switch control circuit, the battery charging and discharging circuit, and the motor control circuit, are processed through the feedback signal X2 of the magnetic lock, the feedback signal X3 of the travel switch, and the motor control signal A2, and finally the linkage between the magnetic lock and the motor is realized. In actual use, it is applied to the electromagnetic lock door. When the unlocking signal is sent, the magnetic lock will be powered off, the motor will be pushed out, the magnetic lock will be pushed out along with the motor, and the electromagnetic lock door will open; when the electromagnetic lock door is closed, the electromagnetic lock door contacts the magnetic lock, and the magnetic lock feedback signal is in a low level state, the control signal A2 is also in a low level state, so that the motor drives the magnetic lock to retract and close the electromagnetic lock door; on the other hand, the battery charging and discharging circuit can keep the magnetic lock working normally even after power failure.

[0046] On the basis of the above embodiments, in other embodiments, further, the control ends of the first relay K4, the second relay K2 and the third relay K3 are all provided with freewheeling diodes, which effectively protect the front-end control circuit.

[0047] On the basis of the above embodiments, in other embodiments, further, the levels of the magnetic lock input signal GPI1 and the travel switch input signal GPI2 are switched between 0 and 12V, and the levels of the magnetic lock feedback signal X2 and the travel switch feedback signal X3 are switched between 0 and 5V, thereby reducing the output variation of the circuit and making the circuit more stable and controllable.

[0048] On the basis of the above embodiments, in other embodiments, further, the magnetic lock switch control circuit includes a first resistor R16 and a second resistor R17, which are connected to the first resistor R16 when the magnetic lock is powered on, and are connected to the second resistor R17 when the magnetic lock is powered off.

[0049] On the basis of the above embodiments, in other embodiments, further, the motor control circuit also includes a motor extension indicator light D7 and a motor retraction indicator light D8. When the motor is extended, the motor extension indicator light D7 lights up, and when the motor is retracted, the motor retraction indicator light D8 lights up, which effectively indicates the working status of the motor and facilitates finding problems.

[0050] On the basis of the above embodiments, in other embodiments, further, the motor control circuit also includes an emergency unlocking interface NO, which will disconnect the power supply of the magnetic lock after being grounded, so that the motor can be pushed out to achieve the purpose of emergency door opening.

[0051] On the basis of the above embodiments, in other embodiments, further, an anti-reverse diode D10 and a voltage-stabilizing diode D12 are provided at both ends of the battery VIN, thereby effectively realizing overvoltage protection.

[0052] On the basis of the above embodiments, in other embodiments, further, the voltage of the voltage stabilizing diode D12 is 13V, which ensures that the battery charging voltage does not exceed the rated value and provides circuit stability.

[0053] See also Figure 6-7 The second embodiment of the utility model also provides an electromagnetic lock door, which includes a magnetic lock 1, a motor 2, a travel switch 3 and the control circuit based on the linkage between the magnetic lock and the motor as described above. The magnetic lock 1 is fixedly connected to the motor 2. Through the control of the control circuit, in actual use, the magnetic lock can be pushed out to push the door open when opening the door to prevent the user from opening the door in time and the magnetic lock sucking the metal block 4 of the door body; when closing the door, when the magnetic lock sucks the door tightly, the motor will retract and tighten the door to make the metal block 4 of the door body close to the door frame. Furthermore, the travel switch 3 is used to obtain a signal whether the door body is closed, and the position of the travel switch 3 is adjusted. When the travel switch 3 is triggered, the control circuit will control the motor 2 to stop retracting to avoid damage caused by continuous retraction of the motor 2, effectively solving the shortcomings of the existing magnetic lock that needs to be kept powered on and the door body that needs to be opened in time, otherwise it will be adsorbed again.

[0054] The above is a detailed introduction to a control circuit and an electromagnetic lock door based on the linkage between a magnetic lock and a motor provided in an embodiment of the utility model. For a general technician in this field, according to the idea of ​​the embodiment of the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A control circuit based on the linkage between a magnetic lock and a motor, wherein the magnetic lock is fixedly connected to the motor, characterized in that: include: Magnetic lock switch control circuit: includes an unlocking signal, a first relay and a magnetic lock, and controls the first relay to provide power to the magnetic lock through the unlocking signal; Feedback circuit: Use two optocoupler chips to convert the level, input the magnetic lock input signal and the travel switch input signal, and output the magnetic lock feedback signal and the travel switch feedback signal; Magnetic lock and motor logic circuit: according to the feedback signal of the magnetic lock and the feedback signal of the travel switch, the switch state of the magnetic lock is judged, and the motor control signal is output; Motor control circuit: including a motor interface, a second relay and a third relay, wherein the second relay and the third relay control the extension and retraction of the motor and simultaneously control the extension and retraction of the magnetic lock; Battery charging and discharging circuit: including a battery input port, a battery output port and a battery, wherein the first relay controls the charging and discharging of the battery; The battery charging and discharging circuit is connected to the magnetic lock switch control circuit, the magnetic lock switch control circuit is connected to the feedback circuit, the feedback circuit is connected to the magnetic lock and motor logic circuit, and the magnetic lock and motor logic circuit is connected to the motor control circuit.

2. The control circuit based on the linkage between the magnetic lock and the motor according to claim 1 is characterized in that: The control ends of the first relay, the second relay and the third relay are all provided with freewheeling diodes.

3. The control circuit based on the linkage between the magnetic lock and the motor according to claim 1 is characterized in that: The levels of the magnetic lock input signal and the travel switch input signal are switched between 0 and 12V, and the levels of the magnetic lock feedback signal and the travel switch feedback signal are switched between 0 and 5V.

4. The control circuit based on the linkage between the magnetic lock and the motor according to claim 1 is characterized in that: The magnetic lock switch control circuit includes a first resistor and a second resistor. The magnetic lock is connected to the first resistor when powered on, and is connected to the second resistor when powered off.

5. The control circuit based on the linkage between the magnetic lock and the motor according to claim 1 is characterized in that: The motor control circuit also includes a motor extension indicator light and a motor retraction indicator light.

6. The control circuit based on the linkage between the magnetic lock and the motor according to claim 1 is characterized in that: The motor control circuit also includes an emergency unlocking interface.

7. The control circuit based on the linkage between the magnetic lock and the motor according to claim 1 is characterized in that: Anti-reverse diodes and voltage-stabilizing diodes are arranged at both ends of the battery.

8. The control circuit based on the linkage between the magnetic lock and the motor according to claim 7 is characterized in that: The voltage of the voltage zener diode is 13V.

9. An electromagnetic door lock, characterized in that: The electromagnetic lock door includes a magnetic lock, a motor, a travel switch and a control circuit based on the linkage between the magnetic lock and the motor as described in any one of claims 1 to 7, and the magnetic lock is fixedly connected to the motor.

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