CN210402481U - Passive electronic lock based on USB - Google Patents

Abstract

The utility model discloses a passive electronic lock based on USB, including lock body the control unit, motor drive circuit and the USB interface module of being connected with mobile terminal, USB interface module connects lock body the control unit's power end and data end respectively through the mode of magnetism, motor drive circuit's input is connected to lock body the control unit's output. The utility model discloses lock body the control unit's power end and data end are connected respectively to the mode that USB interface module was inhaled through the magnetism, can conveniently carry out the data communication between mobile terminal such as cell-phone and lock body the control unit data end through the mode that USB interface cooperation magnetism was inhaled, realize mobile terminal control unblock, can acquire the required power of each component of electronic lock from mobile terminal through the mode that USB interface cooperation magnetism was inhaled again, it is very convenient to carry, difficult loss. The utility model discloses but wide application in tool to lock field.

Description

Passive electronic lock based on USB

Technical Field

The utility model belongs to the technical field of the electronic lock utensil and specifically relates to a passive electronic lock based on USB.

Background

With the continuous development of the technology, the intelligent electronic lock gradually obtains the traditional mechanical lock to become the mainstream of the lock, and the electronic lock with rich shapes, colors and functions is continuously emerged. The passive electronic lock is a new important branch in the field of electronic locks, and is a lock which is intelligently controlled by a modern network communication technology without a power supply. The passive electronic lock does not need to be provided with a power supply, so that the operations of maintenance, replacement and the like of the power supply are omitted, the maintenance cost and the failure rate are reduced, the convenience is high, and the passive electronic lock is widely applied.

The current passive electronic lock mainly comprises an electronic key and a lock body arranged in a door and the like, wherein a control unit, a motor and a lock cylinder are arranged in the lock body, when the electronic key is inserted into the lock cylinder of the lock body, the lock body is powered by the electronic key, the electronic key and the lock body are subjected to information verification and password matching, and after the verification and the matching are successful, the control unit controls the motor to drive a lock tongue of the lock cylinder to move to unlock. The existing passive electronic lock needs to be provided with a special electronic key, and the electronic key is inconvenient to carry and easy to lose.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide a: the portable passive electronic lock based on the USB is provided.

The utility model adopts the technical proposal that:

the utility model provides a passive electronic lock based on USB, includes lock body the control unit, motor drive circuit and the USB interface module who is connected with mobile terminal, USB interface module connects lock body the control unit's power end and data terminal respectively through the mode of magnetism, the input of motor drive circuit is connected to lock body the control unit's output.

Further, the USB interface module comprises a mobile terminal interface, a connecting wire and a magnetic thimble connector, wherein the mobile terminal interface is connected with the thimble connector through the connecting wire, and the thimble connector is respectively connected with the power end and the data end of the lock body control unit in a magnetic attraction manner.

Furthermore, the thimble connector comprises a first thimble, a second thimble and a fourth thimble, the lock body control unit comprises a first pin, a second pin, a third pin and a fourth thimble, and the safety encryption chip is arranged on the lock body control unit; the other end of the first pin is connected with a power supply end of the security encryption chip, the other end of the second pin is connected with a negative data end of the security encryption chip, the other end of the third pin is connected with a positive data end of the security encryption chip, and the other end of the fourth pin is connected with a digital ground.

Further, the lock body control unit further comprises a fuse, a first diode, a first resistor, a light emitting diode, a first capacitor and a second diode, one end of the fuse is connected with the first pin, the other end of the fuse is respectively connected with the anode of the first diode and the cathode of the second diode, the cathode of the first diode is respectively connected with one end of the first capacitor, one end of the first resistor and the power end of the safety encryption chip, the other end of the first resistor is connected with the anode of the light emitting diode, and the cathode of the light emitting diode, the anode of the second diode and the other end of the first capacitor are all connected with a digital ground.

Further, the secure encryption chip adopts a HSC32K1 chip.

Further, the motor driving circuit is composed of a motor driving chip and a peripheral circuit, and the motor driving chip is a direct current speed reducing motor driving chip for driving the positive and negative rotation of the lock tongue motor.

Further, the motor driving chip adopts an HT7K1201 chip.

The utility model has the advantages that: including lock body the control unit, motor drive circuit and the USB interface module of being connected with mobile terminal, USB interface module connects lock body the control unit's power end and data end respectively through the mode of magnetism, can conveniently carry out the data communication between mobile terminal such as cell-phone and lock body the control unit data end through the mode of USB interface cooperation magnetism, realize mobile terminal control unblock, can acquire the required power of each component of electronic lock from mobile terminal through the mode of USB interface cooperation magnetism again, no longer need be equipped with special electronic key, it is very convenient to carry, difficult losing.

Drawings

Fig. 1 is a block diagram of a circuit structure of a passive electronic lock based on USB according to the present invention;

fig. 2 is a schematic structural diagram of the USB interface module of the present invention;

fig. 3 is a circuit connection diagram of the first to fourth pins in the lock body control unit of the present invention;

fig. 4 is a schematic diagram of a specific circuit structure of the security encryption chip of the present invention;

fig. 5 is a schematic diagram of a specific circuit structure of the motor driving circuit of the present invention.

Detailed Description

The invention will be further explained and explained with reference to the drawings and the embodiments in the following description.

Referring to fig. 1, the present embodiment provides a passive electronic lock based on USB, including a lock body control unit, a motor driving circuit, and a USB interface module connected to a mobile terminal, where the USB interface module is respectively connected to a power end and a data end of the lock body control unit in a magnetic attraction manner, and an output end of the lock body control unit is connected to an input end of the motor driving circuit.

Specifically, different with current passive electronic lock based on electronic key is, the use that has combined intelligent terminal such as cell-phone is very general and the advantage that is difficult for losing (compare in small and exquisite), the utility model discloses regard as the key with intelligent terminal such as cell-phone. The USB interface module is a module used for connecting the mobile terminal with the electronic lock body, is generally arranged on the lock body, can provide an interface (such as a TYPE-C interface) of an external mobile terminal, and can communicate with the lock body control unit and supply power to each element of the lock body by directly connecting the mobile terminal to the interface when a user needs to unlock the lock. Different with the common USB interface that adopts mechanical connection, the utility model discloses a USB interface module has adopted the connected mode of magnetism with lock body the control unit, and it is more convenient and reliable (difficult not hard up) to connect, can also shorten USB interface module respectively with the power end of lock body the control unit and the connecting wire between the data end. The mobile terminal is communicated with the data terminal of the lock control unit through the USB interface module, and after the mobile terminal is successfully unlocked, the lock body control unit can drive the spring bolt motor to rotate forward and backward through the motor drive circuit to achieve unlocking operation.

Referring to fig. 1 and 2, preferably, the USB interface module includes a mobile terminal interface 1, a connection line 2 and a magnetic thimble connector 3, the mobile terminal interface 1 is connected to the thimble connector 3 through the connection line 2, and the thimble connector 3 is magnetically connected to a power end and a data end of the lock body control unit respectively.

Specifically, mobile terminal interface 1 can be common mobile terminal interfaces such as TYPE-C interface, and connecting wire 2 can be common electric wire, and thimble connector 3 then can adsorb in lock body the power end of the control unit or data end pin through magnetic effect, reaches the purpose of convenient and reliable connection.

Referring to fig. 1, 2 and 3, preferably, the pin connector 3 includes first to fourth pins, the lock body control unit includes first to fourth pins and a security encryption chip, one end of the first pin TP1 is magnetically attracted to the first pin 31, one end of the second pin TP2 is magnetically attracted to the second pin 32, one end of the third pin TP5 is magnetically attracted to the third pin 33, and one end of the fourth pin TP6 is magnetically attracted to the fourth pin 34; the other end of the first pin TP1 is connected with a power supply terminal 5V of the security encryption chip, the other end of the second pin TP2 is connected with a negative data terminal D-of the security encryption chip, the other end of the third pin TP5 is connected with a positive data terminal D + of the security encryption chip, and the other end of the fourth pin TP6 is connected with a digital DND.

Specifically, TP1, TP2, TP5 and TP6 are 4 magnetically attracted pin terminals to which the security encryption chip is connected, and may be located on the side of the security encryption chip of the lock body. The safety encryption chip is mainly responsible for the logic control operation of the lock control unit and can ensure the safety of unlocking through hardware encryption and other modes.

Referring to fig. 3, preferably, the lock body control unit further includes a FUSE, a first diode D1, a first resistor R1, a light emitting diode HL1, a first capacitor C1 and a second diode D2, one end of the FUSE is connected to the first pin TP1, the other end of the FUSE is respectively connected to an anode of the first diode D1 and a cathode of the second diode D2, a cathode of the first diode D1 is respectively connected to one end of the first capacitor C1, one end of the first resistor R1 and the power terminal 5V of the security encryption chip, the other end of the first resistor R1 is connected to an anode of the light emitting diode HL1, and the cathode of the light emitting diode HL1, the anode of the second diode D2 and the other end of the first capacitor C1 are all connected to a digital DND.

In particular, the FUSE acts as an overload protection to prevent excessive current in the circuit. The first diode D1 and the second diode D2 respectively play a role of overvoltage prevention and reverse connection prevention. The light emitting diode HL1 is used for indicating whether the lock body control unit is normally connected with the USB interface module, if the lock body control unit is normally connected with the USB interface module, the HL1 is lightened, otherwise, the HL1 is extinguished.

Referring to fig. 4, preferably, the secure encryption chip employs a HSC32K1 chip U2.

Specifically, the HSC32K1 chip of beijing macrostem technology llc is a low-power-consumption, low-cost, high-security, multifunctional-password security chip applied to scenes such as USB KEY and personal financial terminal, and the main functions of the chip include: the on-chip RSA and ECC (SM2) coprocessor is used for realizing digital signature and identity authentication; on-chip SM3, SHA hardware algorithm core, etc. Compared with the traditional software encryption mode, the encryption method has the advantages of high speed, safety (physical protection and cracking prevention) and the like. The security encryption chip in fig. 4 includes a HSC32K1 chip U2 and peripheral circuits, the peripheral circuits include a crystal oscillator X1, resistors R2, R5, R6, R7, R10, capacitors C2, C5, C7, C10 and the like, and output terminals M1 and M2 of the HSC32K1 chip U2 are used for connecting a motor driving circuit.

Referring to fig. 4 and 5, preferably, the motor driving circuit is composed of a motor driving chip and a peripheral circuit, and the motor driving chip is a direct current speed reducing motor driving chip for driving the latch motor to rotate forward and backward.

Referring to fig. 5, preferably, the motor driving chip employs a HT7K1201 chip U4.

Specifically, as shown in fig. 5, the HT7K1201 chip is a low voltage motor (i.e., motor) driver introduced by Holtek, which can be widely applied to various products, such as electronic locks, electronic valves, toys, etc. These highly integrated chips of function have the characteristic of low on-resistance power transistor, and its efficiency improves greatly and makes the chip temperature reduce, and then can work under a bigger ambient temperature scope, and two input control pins provide four kinds of mode: forward rotation, reverse rotation, braking, and standby/sleep. The PWM input control frequency can reach 200kHz at most, and the method is very suitable for the application needing accurate speed control.

As shown in fig. 5, the motor driving circuit is composed of a chip U4 and a peripheral circuit, the peripheral circuit includes capacitors C3 and C4, etc., and TP3 and TP4 are connection interfaces of the tongue motor.

The utility model provides a passive electronic lock is when using, at first pass through mobile terminal interface 1 with mobile terminal such as cell-phone and be connected, mobile terminal interface 1 is connected with thimble connector 3 that has magnetism through connecting wire 2, 4 thimbles of thimble connector 3 are connected with the positive and negative data end D + and the D-of safety encryption chip through magnetism interface pin TP2 and TP5 of inhaling, realize mobile terminal such as cell-phone and safety encryption chip's safety communication and unblock verification (if can adopt present national secret hardware password verification mode to realize), thimble connector 3 is the power supply for safety encryption chip and motor drive circuit respectively through magnetism interface pin TP1 of inhaling simultaneously; when the unlocking is successfully verified, the safety encryption chip controls the motor driving circuit to take the driving spring bolt motor to rotate forward and backward, so that the unlocking purpose is achieved.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims (7)

1. A passive electronic lock based on USB, its characterized in that: the USB interface module is connected with a power end and a data end of the lock body control unit respectively in a magnetic attraction mode, and an output end of the lock body control unit is connected with an input end of the motor driving circuit.

2. A passive USB based electronic lock according to claim 1 wherein: the USB interface module comprises a mobile terminal interface, a connecting wire and a magnetic thimble connector, wherein the mobile terminal interface is connected with the thimble connector through the connecting wire, and the thimble connector is respectively connected with the power supply end and the data end of the lock body control unit in a magnetic attraction manner.

3. A passive USB based electronic lock according to claim 2 wherein: the thimble connector comprises a first thimble, a second thimble and a fourth thimble, the lock body control unit comprises a first pin, a second pin, a third pin and a fourth thimble, the first pin, the second pin and the fourth thimble are magnetically connected, one end of the first pin is magnetically connected with the first thimble, one end of the second pin is magnetically connected with the second thimble, one end of the third pin is magnetically connected with the third thimble, and one end of the fourth pin is magnetically connected with the fourth thimble; the other end of the first pin is connected with a power supply end of the security encryption chip, the other end of the second pin is connected with a negative data end of the security encryption chip, the other end of the third pin is connected with a positive data end of the security encryption chip, and the other end of the fourth pin is connected with a digital ground.

4. A passive USB based electronic lock according to claim 3 wherein: the lock body control unit further comprises a fuse, a first diode, a first resistor, a light emitting diode, a first capacitor and a second diode, one end of the fuse is connected with the first pin, the other end of the fuse is respectively connected with the anode of the first diode and the cathode of the second diode, the cathode of the first diode is respectively connected with one end of the first capacitor, one end of the first resistor and the power end of the safety encryption chip, the other end of the first resistor is connected with the anode of the light emitting diode, and the cathode of the light emitting diode, the anode of the second diode and the other end of the first capacitor are all connected with a digital ground.

5. A passive USB-based electronic lock as claimed in claim 3 or claim 4, wherein: the secure encryption chip adopts an HSC32K1 chip.

6. A passive USB-based electronic lock according to any one of claims 1-4, wherein: the motor driving circuit is composed of a motor driving chip and a peripheral circuit, and the motor driving chip is a direct current speed reducing motor driving chip for driving the positive and negative rotation of the lock tongue motor.

7. A passive USB-based electronic lock as recited in claim 6, wherein: the motor driving chip adopts a HT7K1201 chip.

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