Intelligent door lock

Abstract

The invention provides an intelligent door lock which comprises an inductor and an actuator, the inductor is in communication connection with the actuator, the actuator is used for unlocking the intelligent door lock according to an induction signal of the inductor, the actuator comprises a power circuit, and the power circuit comprises a transformer, a rectification module and a voltage reduction module. The voltage of the power supply is converted into a first voltage through the transformer, the first voltage is rectified by the rectification module, and then the first voltage is converted by the voltage reduction module, so that the first voltage is reduced to a second voltage. The transformer can convert the voltage of the power supply in a preset voltage range into a first voltage. Therefore, the intelligent door lock can be suitable for the power supplies with different voltages, as long as the voltages of the power supplies fall into the preset voltage range, the types of the power supplies capable of being connected to the intelligent door lock can be increased, and power can be conveniently supplied to the intelligent door lock.

Description

Technical Field

[0001] The present application relates to the field of door lock technology, and in particular to a smart door lock. Background Art

[0002] To prevent human tissue from accidentally entering the operating area of production equipment, most high-risk production equipment, such as stamping machines, are equipped with smart door locks. These machines are protected by fences and mesh to prevent foreign objects from entering. However, a door is left open for workers to enter for maintenance or to check on the work progress. This door is unlocked with a key. Currently, smart door locks are limited to 12V power supplies. When installed in a factory, a separate 12V power supply is required to power the lock, limiting their application scenarios. Summary of the Invention

[0003] In view of the above problems, it is necessary to provide a smart door lock to increase the applicable scenarios of the smart door lock.

[0004] In a first aspect, the present application provides a device including a sensor and an actuator, wherein the sensor is communicatively connected to the actuator, and the actuator is used to unlock the smart door lock according to the sensing signal of the sensor. The actuator includes a power supply circuit, and the power supply circuit includes: a transformer, wherein the input end of the transformer is connected to the power supply, and the transformer is used to convert the voltage of the power supply into a first voltage, and the voltage of the power supply is within a preset voltage range; a rectifier module, wherein the rectifier module is connected to the output end of the transformer, and the rectifier module is used to rectify the first voltage; and a step-down module, wherein the step-down module is connected to the rectifier module, and the step-down module is used to perform voltage conversion on the rectified first voltage to reduce the first voltage to a second voltage to power the actuator.

[0005] In one embodiment of the first aspect, the rectifier module includes a rectifier diode, an anode of the rectifier diode is connected to the output end of the transformer, and a cathode of the rectifier diode is connected to the input end of the step-down module.

[0006] In one embodiment of the first aspect, the rectifier module also includes a first capacitor and a second capacitor, one end of the first capacitor is connected to the cathode of the rectifier diode, and the other end of the first capacitor is grounded; one end of the second capacitor is connected to the cathode of the rectifier diode, and the other end of the second capacitor is grounded; the first capacitor and the second capacitor are used to perform voltage stabilization and filtering for the rectified first voltage.

[0007] In one embodiment of the first aspect, the buck module includes a buck chip, the input end of the buck chip is connected to the rectifier module to receive the rectified first voltage, the buck chip is used to convert the first voltage to a second voltage, and the output end of the buck chip is used to output the second voltage.

[0008] In one embodiment of the first aspect, the step-down module includes a third capacitor and a fourth capacitor, one end of the third capacitor is connected to the output end of the step-down chip, and the other end of the third capacitor is grounded; one end of the fourth capacitor is connected to the output end of the step-down chip, and the other end of the fourth capacitor is grounded; the third capacitor and the fourth capacitor are used to stabilize and filter the second voltage.

[0009] In one embodiment of the first aspect, the preset voltage range is 9 to 36V.

[0010] In one embodiment of the first aspect, the actuator also includes a control circuit, the control circuit includes a control module and an execution module connected to the control module, the control module is connected to the sensor, and the power supply end of the control module is connected to the output end of the step-down module; the control module is used to: when receiving the induction signal, send an execution signal to the execution module according to the induction signal; the power supply end of the execution module is connected to the output end of the rectifier module, and the execution module is used to generate an unlocking signal according to the execution signal to control the smart door lock to unlock.

[0011] In one embodiment of the first aspect, the smart door lock further includes a lock body, the execution module is connected to the lock body, and the lock body is used to receive an unlocking signal and unlock according to the unlocking signal.

[0012] In one embodiment of the first aspect, the control circuit further includes an indication module, which is connected to the control module. The control module is further configured to: when receiving the sensing signal, send an indication signal to the indication module, and the indication module displays the status of the smart door lock according to the indication signal.

[0013] In one embodiment of the first aspect, the smart door lock is arranged on the safety door, the safety door is arranged on the outside of the mechanical equipment, the actuator is also communicated with the mechanical equipment, and the actuator is also used to send a stop signal to the mechanical equipment according to the sensing signal, so that the mechanical equipment stops operating according to the stop signal.

[0014] In the smart door lock of the embodiment of the present application, the voltage of the power supply is converted to a first voltage by a transformer. After the rectifier module rectifies the first voltage, the step-down module performs voltage conversion on the first voltage to reduce the first voltage to a second voltage. The transformer can convert the voltage of the power supply within a preset voltage range to the first voltage. As a result, the smart door lock can be used with power supplies of different voltages, as long as the voltage of the power supply falls within the preset voltage range. This can increase the types of power supplies that the smart door lock can connect to, making it easier to power the smart door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a module diagram of the smart door lock according to an embodiment of the present application.

[0016] Figure 2 This is a module schematic diagram of the power supply circuit of the smart door lock according to an embodiment of the present application.

[0017] Figure 3 This is a module diagram of the control circuit of the smart door lock according to an embodiment of the present application.

[0018] Figure 4 This is a schematic diagram of the internal circuit of the smart door lock according to an embodiment of the present application.

[0019] Description of main component symbols

[0020] Smart door lock 100

[0021] Sensor 10

[0022] Actuator 20

[0023] Power supply circuit 21

[0024] Transformer T1

[0025] Rectifier module 210

[0026] Rectifier diode D1

[0027] The first capacitor C1

[0028] The second capacitor C2

[0029] Buck module 211

[0030] Buck chip U1

[0031] The third capacitor C3

[0032] Fourth capacitor C4

[0033] Control circuit 22

[0034] Control module 220

[0035] Control chip U2

[0036] Execution module 221

[0037] First diode D2

[0038] The first switch Q1

[0039] The second switch tube Q2

[0040] Relay K1

[0041] First resistor R1

[0042] The second resistor R2

[0043] The third resistor R3

[0044] Fourth resistor R4

[0045] Signal receiving module 222

[0046] The fifth resistor R5

[0047] Sixth resistor R6

[0048] Instruction module 223

[0049] Seventh resistor R7

[0050] LED D3

[0051] Reset module 224

[0052] The eighth resistor R8

[0053] Frequency stabilizing capacitor C7

[0054] Crystal oscillator module 225

[0055] Crystal oscillator Y1

[0056] Signal filtering module 226

[0057] Ninth resistor R9

[0058] Tenth resistor R10

[0059] Lock body 30

[0060] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0062] It should be noted that when an element is referred to as being "electrically connected" to another element, it may be directly on the other component or there may be an intermediate element. When an element is considered to be "electrically connected" to another element, it may be a contact connection, for example, a wire connection, or a contactless connection, for example, a contactless coupling.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0065] See also Figure 1 and Figure 2 The embodiment of the present application provides a smart door lock 100, which includes a sensor 10 and an actuator 20. The sensor 10 is in communication with the actuator 20, and the actuator 20 is used to unlock the smart door lock 100 according to the sensing signal of the sensor 10. It can be understood that the sensor 10 is used to detect an induction key. When the induction key is detected to enter the sensing area, the sensor 10 generates a sensing signal and sends the sensing signal to the actuator 20.

[0066] The actuator 20 may further include a power supply circuit 21 for supplying power to the actuator 20. The power supply circuit 21 includes a transformer T1, a rectifier module 210, and a step-down module 211. The input of the transformer T1 is connected to a power supply, and the transformer T1 is configured to convert the voltage of the power supply into a first voltage within a preset voltage range. The rectifier module 210 is connected to the output of the transformer T1 and is configured to rectify the first voltage. The step-down module 211 is connected to the rectifier module 210 and is configured to convert the rectified first voltage to a second voltage to power the actuator 20.

[0067] The input voltage and output voltage of the transformer T1 are both AC, and the actuator 20 needs to be powered by DC. Therefore, the first voltage output by the transformer T1 is rectified by the rectifier module 210 and then provided to the step-down module 211 for voltage conversion.

[0068] In the smart door lock 100 of the embodiment of the present application, the voltage of the power supply is converted to a first voltage by the transformer T1. After the rectifier module 210 rectifies the first voltage, the step-down module 211 performs voltage conversion on the first voltage to reduce the first voltage to a second voltage. Among them, the transformer T1 can convert the voltage of the power supply within the preset voltage range into the first voltage. As a result, the smart door lock 100 can be used with power supplies of different voltages, as long as the voltage of the power supply falls within the preset voltage range. This can increase the types of power supplies that the smart door lock 100 can access, making it easier to power the smart door lock 100.

[0069] It is understood that in some embodiments, the preset voltage range can be 9 to 36 V, that is, as long as the voltage range of the power supply is within 9 to 36 V, the smart door lock 100 can be powered. Of course, the preset voltage range of the embodiment of the present application is not limited to this and can be set according to the actual needs of the smart door lock 100.

[0070] In some embodiments, the first voltage may be 12 V and the second voltage may be 5 V. Of course, the first voltage and the second voltage in the embodiment of the present application are not limited thereto and can be set according to the actual power demand of the smart door lock 100.

[0071] like Figure 4 As shown, the rectifier module 210 may include a rectifier diode D1, the anode of the rectifier diode D1 is connected to the output end of the transformer T1, and the cathode of the rectifier diode D1 is connected to the input end of the step-down module 211. The first voltage output by the transformer T1 is rectified by the rectifier diode D1 and converted into direct current.

[0072] Furthermore, the rectifier module 210 also includes a first capacitor C1 and a second capacitor C2, one end of the first capacitor C1 is connected to the cathode of the rectifier diode D1, and the other end of the first capacitor C1 is grounded. One end of the second capacitor C2 is connected to the cathode of the rectifier diode D1, and the other end of the second capacitor C2 is grounded. The first capacitor C1 and the second capacitor C2 are used to perform voltage stabilization and filtering for the rectified first voltage. The rectified first voltage is subjected to voltage stabilization and filtering by the first capacitor C1 and the second capacitor C2 to form a stable direct current, thereby facilitating voltage conversion by the step-down module 211.

[0073] Specifically, the first capacitor C1 can be used to filter out clutter, and the second capacitor C2 can be used to filter out the oscillating voltage.

[0074] Please refer again Figure 4 The buck module 211 may include a buck chip U1, the input end of the buck chip U1 is connected to the rectifier module 210 to receive the rectified first voltage, the buck chip U1 is used to convert the first voltage into a second voltage, and the output end of the buck chip U1 is used to output the second voltage.

[0075] In some specific examples, the model of the step-down chip U1 may be a BL1117-50CX voltage regulator chip.

[0076] Furthermore, the step-down module 211 may further include a third capacitor C3 and a fourth capacitor C4, one end of the third capacitor C3 being connected to the output terminal of the step-down chip U1, and the other end of the third capacitor C3 being grounded. One end of the fourth capacitor C4 being connected to the output terminal of the step-down chip U1, and the other end of the fourth capacitor C4 being grounded. The third capacitor C3 and the fourth capacitor C4 are used to filter and stabilize the second voltage. The second voltage is stabilized and filtered by the third capacitor C3 and the fourth capacitor C4, and can output a stable second voltage, reducing voltage fluctuations and improving voltage stability.

[0077] In some embodiments, as Figure 3 As shown, the actuator 20 also includes a control circuit 22, which includes a control module 220 and an execution module 221 connected to the control module 220. The control module 220 is connected to the sensor 10, and the power supply end of the control module 220 is connected to the output end of the step-down module 211; the control module 220 is used to: when receiving the induction signal, send an execution signal to the execution module 221 according to the induction signal; the power supply end of the execution module 221 is connected to the output end of the rectifier module 210, and the execution module 221 is used to generate an unlocking signal according to the execution signal to control the smart door lock 100 to unlock.

[0078] The control module 220 may include a control chip U2, such as a single chip microcomputer. The power supply end of the execution module 221 and the output end of the rectifier module 210, that is, the execution module 221 is powered by the rectified first voltage.

[0079] In some embodiments, as Figure 3 As shown, the control circuit 22 may further include a signal receiving module 222 . The signal receiving module 222 is connected between the sensor 10 and the control module 220 . The signal receiving module 222 is configured to receive a sensing signal and send the sensing signal to the control module 220 .

[0080] The sensing signal sent by the sensor 10 can be a Wiegand signal, which is a two-way binary data. When the sensor 10 does not send a sensing signal, the fifth resistor R5 and the sixth resistor R6 of the signal receiving module 222 are pulled up (such as Figure 4 For example, when the sensor 10 sends a sensing signal, the first signal output terminal and the second signal output terminal alternately output a 400us low pulse signal to the control module 220.

[0081] Please continue reading Figure 3In some embodiments, the control circuit 22 may further include an indication module 223, which is connected to the control module 220. The control module 220 is also used to send an indication signal to the indication module 223 when receiving the sensing signal, so that the indication module 223 displays the status of the smart door lock 100 according to the indication signal.

[0082] In some embodiments, the smart door lock 100 further includes a lock body 30, the execution module 221 is connected to the lock body 30, and the lock body 30 is used to receive the unlock signal and unlock according to the unlock signal.

[0083] The following Figure 4 The control circuit 22 of the actuator 20 according to the embodiment of the present application is described as an example.

[0084] The control module 220 may include a control chip U2, which is provided with a power supply terminal VCC, a first receiving terminal WG_D0, a second receiving terminal WG_D1, a first output terminal RLY, and a second output terminal LED. The power supply terminal VCC of the control chip U2 is connected to the output terminal of the step-down chip U1 so that the control chip U2 is powered by the second voltage. The first receiving terminal WG_D0 and the second receiving terminal WG_D1 of the control chip U2 are connected to the signal receiving module 222 for receiving the sensing signal. The first output terminal RLY of the control chip U2 is connected to the execution module 221 to output an execution signal to the execution module 221. The execution module 221 outputs an unlocking signal to the lock body 30 based on the execution signal. The second output terminal LED of the control chip U2 is connected to the indication module 223 to send an indication signal to the indication module 223.

[0085] The execution module 221 may include a first diode D2, a first switch Q1, a second switch Q2, and a relay K1. The cathode of the first diode D2 is connected to the cathode of the rectifier diode D1, the anode of the first diode D2 is connected to the first terminal of the first switch Q1, the second terminal of the first switch Q1 is grounded, the control terminal of the first switch Q1 is connected to the second terminal of the second switch Q2, the first terminal of the second switch Q2 is connected to the output terminal of the step-down chip U1, and the control terminal of the second switch Q2 is connected to the first output terminal RLY of the control chip U2 to receive an execution signal. The first and eighth pins of the relay K1 (a coil is connected between the first and eighth pins) are respectively connected to the two ends of the first diode D2 to power the relay K1 with a first voltage. The second and third pins of the relay K1 are connected to the lock body 30. The lock body 30 can be installed on the corresponding door. Specifically, the lock body 30 can be an electromagnetic lock. Of course, the lock body 30 in the embodiment of the present application is not limited to an electromagnetic lock and can also be other lock bodies 30 that can be controlled to unlock and lock.

[0086] When the first output terminal RLY of the control module 220 outputs an unlock signal, the second switch Q2 turns on, turning on the first switch Q1. This energizes the coil between the first and eighth pins of the relay K1, turning on the second and third pins (closing the internal switch). The electromagnetic lock circuit is turned on, and current flows through the electromagnet coil, pulling the lock tongue out of the keyhole, thereby unlocking the electromagnetic lock and allowing the corresponding door to be opened. When the first output terminal RLY of the control chip U2 does not output an execution signal, both the first and second switches Q1 and Q2 are closed, the second and third pins of the relay K1 are disconnected, the electromagnetic lock circuit is disconnected, and no current flows in the electromagnet coil. The lock tongue, under the action of the reset spring, extends and inserts into the keyhole, locking the security door.

[0087] Furthermore, the execution module 221 may further include a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The first resistor R1 is connected between the second terminal of the second switch Q2 and the control terminal of the first switch Q1, the second resistor R2 is connected between the output terminal of the buck chip U1 and the control terminal of the second switch Q2, the third resistor R3 is connected between the control terminal of the first switch Q1 and ground, and the fourth resistor R4 is connected between the first output terminal RLY of the control chip U2 and the control terminal of the second switch Q2.

[0088] The signal receiving module 222 may include a fifth resistor R5 and a sixth resistor R6. One end of the fifth resistor R5 and the sixth resistor R6 is connected to the output end of the buck chip U1. The other end of the fifth resistor R5 is connected to the first signal output end of the sensor 10 and the first receiving end WG_D0 of the control chip U2. The other end of the sixth resistor R6 is connected to the second signal output end of the sensor 10 and the second receiving end WG_D1 of the control chip U2 to send the sensing signal to the control chip U2.

[0089] The indication module 223 may include a seventh resistor R7 and a light emitting diode D3, one end of the seventh resistor R7 is connected to the output end of the step-down chip U1, the other end of the seventh resistor R7 is connected to the anode of the light emitting diode D3, and the cathode of the light emitting diode D3 is connected to the second output end LED of the control chip U2. The indication module 223 may also include a filter capacitor (such as Figure 4 Capacitors C5, C6 shown in FIG).

[0090] The actuator 20 of the embodiment of the present application may further include some other peripheral circuits of the control chip U2, such as a reset module 224, a crystal oscillator module 225, and the like.

[0091] The reset module 224 may include an eighth resistor R8, one end of which is connected to the reset output terminal RST of the control chip U2, and the other end of which is grounded. The reset module 224 may also include a frequency-stabilizing capacitor C7, one end of which is connected to the output terminal of the step-down chip U1, and the other end of which is connected between the eighth resistor R8 and the reset output terminal RST of the control chip U2.

[0092] The crystal oscillator module 225 includes a crystal oscillator Y1, the two ends of which are respectively connected to the clock input terminal XTAL1 and the clock output terminal XTAL2 of the control chip U2. The crystal oscillator module 225 may also include a filter capacitor (such as Figure 4 C8, C9 shown).

[0093] In some embodiments, the smart door lock 100 can be installed on a safety door, which is installed outside the mechanical equipment. For example, the mechanical equipment can be surrounded by a protective fence, which has a safety door, and the safety interlock device is installed on the safety door. Based on this, the actuator 20 can be connected to the mechanical equipment (not shown). The actuator 20 is also used to send a shutdown signal to the mechanical equipment based on the sensing signal, so that the mechanical equipment stops operating according to the shutdown signal.

[0094] Therefore, when the staff opens the safety door and approaches the mechanical equipment, the mechanical equipment has stopped running as the safety door is unlocked, which can ensure the safety of the staff entering the vicinity of the mechanical equipment and reduce the probability of safety accidents.

[0095] It can be understood that the shutdown signal can be sent by the control chip U2 to the mechanical equipment.

[0096] In some embodiments, the actuator 20 may also send a locking signal to the lock body 30 to lock the security door when no sensing signal is received. For example, when the staff closes the security door and removes the sensing key from the sensing area, the actuator 20 locks the security door.

[0097] In some embodiments, after the safety door is opened and the mechanical device stops operating, the actuator 20 may also obtain the status of the safety door upon receiving a reset signal from the mechanical device. When the actuator 20 determines that the safety door is locked, it sends a first status signal to the mechanical device to cause the mechanical device to resume operation based on the first status signal. When the actuator 20 determines that the safety door is unlocked, it sends a second status signal to the mechanical device to cause the mechanical device to stop operating based on the second status signal.

[0098] A reset button connected to the mechanical device can be provided outside the safety door. When a worker presses the reset button, a reset signal is generated and provided to the mechanical device, which then sends the reset signal to the actuator 20. The actuator 20 obtains the status of the safety door based on the reset signal and sends a corresponding status signal to the mechanical device based on the status of the safety door.

[0099] Therefore, the staff member needs to close the safety door, lock the safety door with the lock body 30, and then press the reset button. The mechanical equipment will receive the reset signal, and the mechanical equipment will send the reset signal to the actuator 20. The actuator 20 will detect that the safety door is in the locked state based on the reset signal. Only then will the actuator 20 send the first status signal to the mechanical equipment, causing the mechanical equipment to resume operation based on the first status signal. This ensures that the safety door is also locked when the mechanical equipment resumes operation, further improving safety. When the lock body 30 is in the unlocked state, even if the staff member presses the reset button, the mechanical equipment will receive the reset signal and will remain stopped based on the second status signal sent by the actuator 20. This prevents the mechanical equipment from resuming operation when the safety door is not locked and closed, thereby preventing a safety accident.

[0100] It can be understood that the reset signal can be sent by the mechanical device to the control chip U2, and the first state signal and the second state signal can be sent by the control chip U2 to the mechanical device.

[0101] It is understood that a status sensor can be provided to detect the status of the security door. The status sensor can detect the opening and closing of the security door and whether the lock body 30 is locked, and determine the status of the security door based on the detection results. For example, when the security door is detected to be closed and the lock body 30 is locked, the security door is determined to be in the locked state; when the security door is detected to be open or the lock body 30 is unlocked, the security door is determined to be in the unlocked state. The status sensor can be provided independently of the actuator 20 or integrated into the actuator 20. The embodiments of the present application do not limit the specific device type and model of the status sensor.

[0102] It is understandable that in order to facilitate the staff to know the status of the lock body 30, the actuator 20 can also generate an indication signal when receiving the sensing signal, and display the status of the lock body 30 according to the indication signal.

[0103] Please refer again Figure 4 In some embodiments, as Figure 4 As shown, the control chip U2 may further include a third receiving terminal RXD and a third output terminal TXD. The third output terminal TXD of the control chip U2 is connected to the mechanical device to output a shutdown signal and a safety door status signal to the mechanical device. The third receiving terminal RXD of the control chip U2 is connected to the mechanical device to receive a reset signal of the mechanical device.

[0104] Furthermore, the control circuit 22 may also include a signal filtering module 226, which may include a ninth resistor R9 and a tenth resistor R10, one end of each of the ninth resistor R9 and the tenth resistor R10 being connected to the output end of the buck chip U1, the other end of the ninth resistor R9 being connected to the third receiving end RXD of the control chip U2 to filter the reset signal, and the other end of the tenth resistor R10 being connected to the third output end TXD of the control chip U2 to filter the shutdown signal, the first state signal or the second state signal.

[0105] In some embodiments, the sensor 10 can be an NFC card reader, and the induction key can be an NFC card. When the NFC card is brought into proximity with the NFC card reader, the NFC card reader transmits electrical energy to the NFC card via radio waves, causing the NFC card to generate an induction current. The NFC card then transmits its information to the NFC card reader via radio waves. The NFC card reader then generates an induction signal based on the received card information and sends it to the actuator 20. Of course, in the embodiments of the present application, the sensor 10 and the induction key are not limited to this.

[0106] The above embodiments are intended only to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions of the technical solutions of the present application may be made without departing from the spirit and scope of the technical solutions of the present application. Those skilled in the art may also make other changes within the spirit of the present application and apply them to the design of the present application, as long as they do not deviate from the technical effects of the present application. These changes made in accordance with the spirit of the present application should be included in the scope of protection claimed in the present application.

Claims

1. A smart door lock, comprising a sensor and an actuator, wherein the sensor is in communication with the actuator, and the actuator is used to unlock the smart door lock according to a sensing signal from the sensor, characterized in that: The actuator includes a power supply circuit, and the power supply circuit includes: a transformer, wherein an input end of the transformer is connected to a power supply, and the transformer is used to convert a voltage of the power supply into a first voltage, wherein the voltage of the power supply is within a preset voltage range; a rectifier module, the rectifier module being connected to an output end of the transformer and configured to rectify the first voltage; A step-down module is connected to the rectifier module and is used to perform voltage conversion on the rectified first voltage to reduce the first voltage to a second voltage to power the actuator.

2. The smart door lock according to claim 1, wherein: The rectifier module includes a rectifier diode, an anode of the rectifier diode is connected to the output end of the transformer, and a cathode of the rectifier diode is connected to the input end of the step-down module.

3. The smart door lock according to claim 2, characterized in that: The rectifier module also includes a first capacitor and a second capacitor, one end of the first capacitor is connected to the cathode of the rectifier diode, and the other end of the first capacitor is grounded; one end of the second capacitor is connected to the cathode of the rectifier diode, and the other end of the second capacitor is grounded; the first capacitor and the second capacitor are used to perform voltage stabilization and filtering for the rectified first voltage.

4. The smart door lock according to any one of claims 1 to 3, characterized in that: The step-down module includes a step-down chip, the input end of the step-down chip is connected to the rectifier module to receive the rectified first voltage, the step-down chip is used to convert the first voltage into the second voltage, and the output end of the step-down chip is used to output the second voltage.

5. The smart door lock according to claim 4, characterized in that: The step-down module includes a third capacitor and a fourth capacitor, one end of the third capacitor is connected to the output end of the step-down chip, and the other end of the third capacitor is grounded; one end of the fourth capacitor is connected to the output end of the step-down chip, and the other end of the fourth capacitor is grounded; the third capacitor and the fourth capacitor are used to stabilize and filter the second voltage.

6. The smart door lock according to claim 1, wherein: The preset voltage range is 9 to 36V.

7. The smart door lock according to claim 1, wherein: The actuator also includes a control circuit, which includes a control module and an execution module connected to the control module, the control module is connected to the sensor, and the power supply end of the control module is connected to the output end of the step-down module; the control module is used to: when receiving the induction signal, send an execution signal to the execution module according to the induction signal; the power supply end of the execution module is connected to the output end of the rectifier module, and the execution module is used to generate an unlocking signal according to the execution signal to control the smart door lock to unlock.

8. The smart door lock according to claim 7, characterized in that: The smart door lock further includes a lock body, the execution module is connected to the lock body, and the lock body is used to receive the unlock signal and unlock according to the unlock signal.

9. The smart door lock according to claim 7, wherein: The control circuit also includes an indication module, which is connected to the control module. The control module is further configured to: when receiving the sensing signal, send an indication signal to the indication module, and the indication module displays the status of the smart door lock according to the indication signal.

10. The smart door lock according to claim 1, wherein: The smart door lock is set on the safety door, and the safety door is set on the outside of the mechanical equipment. The actuator is also communicated with the mechanical equipment. The actuator is also used to send a stop signal to the mechanical equipment according to the sensing signal, so that the mechanical equipment stops operating according to the stop signal.

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