CN220522276U - Passive intelligent door lock and door lock system - Google Patents

Abstract

The application relates to a passive intelligent door lock and a door lock system, wherein the passive intelligent door lock comprises a door lock mechanism, a door lock driving module, an induction module and a capacitor module, and the door lock mechanism is arranged on a door body; the door body is provided with a containing cavity, and a first panel of the door body is provided with a first installation area; the door lock driving module is arranged in the accommodating cavity and is used for driving the door lock mechanism to unlock; the sensing module is arranged in the first installation area and is used for being in communication connection with the NFC equipment; the sensing module is configured to obtain an instantaneous current signal when communication connection is established with the NFC equipment; the capacitor module is arranged in the accommodating cavity and is connected between the door lock driving module and the induction module; the capacitor module is configured to control the door lock driving module to work according to the received instantaneous current signal, passive low-power unlocking is achieved, a battery is not required to be additionally arranged, namely, battery power supply is not required to be adopted, cost is reduced, and energy is saved.

Description

Passive intelligent door lock and door lock system

Technical Field

The application relates to the technical field of door locks, in particular to a passive intelligent door lock and a door lock system.

Background

Along with development of science and technology and improvement of living standard, intelligent door locks are widely applied to hotels and guesthouses, and the intelligent door locks can be unlocked through an electronic unlocking mode. At present, the intelligent door lock is mainly powered by a battery, for example, for a disposable battery, the battery needs to be replaced after a period of time (such as half a year) of use due to the limited capacity of the disposable battery, and the battery is replaced frequently; corresponding to rechargeable batteries, because the capacity of the rechargeable batteries is limited, the rechargeable batteries need to be charged after a period of use, corresponding charging adapters need to be equipped, and the users experience poor using experience due to manual operation and charging.

In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: in the existing intelligent door lock power supply mode, battery power is generally adopted, the service life of the battery is short, frequent replacement is needed, and the cost is high.

Disclosure of Invention

In view of the above, it is necessary to provide a passive smart door lock and a door lock system that can be powered without using a battery, and that is passive, low in power consumption, and low in cost, in order to solve the problems of the conventional smart door lock power supply system.

To achieve the above object, an embodiment of the present utility model provides a passive smart door lock, including:

the door lock mechanism is arranged on the door body; the door body is provided with a containing cavity, and a first panel of the door body is provided with a first installation area;

the door lock driving module is arranged in the accommodating cavity and is used for driving the door lock mechanism to unlock;

the sensing module is arranged in the first installation area and is used for being in communication connection with the NFC equipment; the sensing module is configured to obtain an instantaneous current signal when communication connection is established with the NFC equipment;

the capacitor module is arranged in the accommodating cavity and is connected between the door lock driving module and the induction module; the capacitor module is configured to control the door lock driving module to work according to the received instantaneous current signal.

In one embodiment, the sensing module comprises an NFC sensing chip;

the NFC sensing chip is connected with the capacitor module.

In one embodiment, the door lock driving module comprises a motor and a motor driving circuit, and the motor driving circuit is connected between the motor and the capacitor module; the motor is used for driving the door lock mechanism to unlock.

In one embodiment, the door lock mechanism includes a lock tongue and a lock cylinder;

the lock core is mechanically connected with the lock tongue, and the motor is used for driving the lock core to move so that the lock core drives the lock tongue to unlock.

In one embodiment, the passive smart door lock further comprises a reset mechanism; the reset mechanism is mechanically connected with the door lock mechanism and is used for resetting and locking the door lock mechanism.

In one embodiment, the capacitive module includes at least 2 capacitors, each connected in parallel.

In one embodiment, the passive intelligent door lock further comprises a circuit board, the circuit board comprises a circuit layer, and the door lock driving module, the sensing module and the capacitance module are respectively arranged on the circuit layer.

On the other hand, the embodiment of the utility model also provides a door lock system, which comprises NFC equipment and the passive intelligent door lock.

In one embodiment, an NFC device includes a mobile terminal body and an NFC unit; the NFC unit is arranged on the mobile terminal main body.

In one embodiment, the NFC device further comprises a housing; the shell is of a card-shaped structure, and the NFC unit is arranged in the shell.

One of the above technical solutions has the following advantages and beneficial effects:

each embodiment of the passive intelligent door lock comprises a door lock mechanism, a door lock driving module, an induction module and a capacitor module, wherein the door lock mechanism is arranged on a door body; the door body is provided with a containing cavity, and a first panel of the door body is provided with a first installation area; the door lock driving module is arranged in the accommodating cavity and is used for driving the door lock mechanism to unlock; the sensing module is arranged in the first installation area and is used for being in communication connection with the NFC equipment; the sensing module is configured to obtain an instantaneous current signal when communication connection is established with the NFC equipment; the capacitor module is arranged in the accommodating cavity and is connected between the door lock driving module and the induction module; the capacitor module is configured to control the door lock driving module to work according to the received instantaneous current signal, so that passive low-power-consumption unlocking is realized. According to the NFC door, the sensing module, the capacitance module and the door lock driving module are arranged on the door body, a user can carry NFC equipment, when the NFC equipment approaches to the sensing range of the sensing module, the NFC equipment carries an instantaneous current signal to establish communication connection with the sensing module, and then the instantaneous current signal is generated; the sensing module can transmit the instantaneous current signal to the capacitance module to realize the charging of the capacitance module; then discharge to door lock drive module through the electric capacity module, and then realize controlling door lock drive module work for door lock drive module drive door lock mechanism unblanks, thereby need not to set up the battery in addition, need not to adopt battery powered promptly, realizes passive low-power consumption, the cost is reduced has practiced thrift the energy.

Drawings

FIG. 1 is a first schematic structural view of a passive smart door lock in one embodiment;

FIG. 2 is a second schematic structural view of a passive smart door lock in one embodiment;

FIG. 3 is a third schematic structural view of a passive smart door lock according to one embodiment;

fig. 4 is a schematic diagram of a fourth structure of a passive smart door lock in one embodiment.

Reference numerals:

10. a door lock mechanism; 110. a bolt; 120. a lock core; 20. a door lock driving module; 210. a motor; 220. a motor driving circuit; 30. an induction module; 310. an NFC sensing chip; 40. a capacitance module; 50. an NFC device; 60. and a reset mechanism.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to fig. 1 to 4 in conjunction with embodiments.

In one embodiment, as shown in fig. 1, a passive smart door lock is provided that includes a door lock mechanism 10, a door lock drive module 20, a sense module 30, and a capacitance module 40. The door lock mechanism 10 is arranged on the door body; the door body is provided with a containing cavity, and a first panel of the door body is provided with a first installation area; the door lock driving module 20 is arranged in the accommodating cavity, and the door lock driving module 20 is used for driving the door lock mechanism 10 to unlock; the sensing module 30 is disposed in the first installation area, and the sensing module 30 is configured to be communicatively connected to the NFC device 50; the sensing module 30 is configured to obtain an instantaneous current signal when a communication connection is established with the NFC device 50; the capacitor module 40 is arranged in the accommodating cavity, and the capacitor module 40 is connected between the door lock driving module 20 and the sensing module 30; the capacitance module 40 is configured to control the door lock driving module 20 to operate according to the received instantaneous current signal.

The door lock mechanism 10 is installed on the door body, and the door body is opened or closed by unlocking or locking actions of the door lock mechanism 10. The door body is provided with a receiving cavity which can be used for receiving the door lock mechanism 10, and the receiving cavity can be used for receiving the door lock driving module 20 and the capacitor module 40. Illustratively, the door body may be provided with 2 receiving cavities (i.e., a first receiving cavity and a second receiving cavity), wherein the first receiving cavity may be used to receive the door latch mechanism 10; the second receiving chamber may be used to receive the capacitive module 40 and the door lock driving module 20.

The first panel of the door body is provided with a first installation area; the first panel may be a door panel facing out of the room. The first mounting area may be used to locate the sensing module 30. Further, be provided with first via hole in the first installation zone, first via hole and hold the chamber intercommunication each other, and then the connecting wire of response module 30 is connected to capacitor module 40 through first via hole, and capacitor module 40 connects door lock drive module 20, realizes that response module 30 respectively with capacitor module 40's electric connection, and hidden the wiring of connecting wire, does not influence pleasing to the eye.

The door lock driving module 20 may be configured to receive the electrical signal transmitted by the capacitor module 40, and drive the door lock mechanism 10 to unlock according to the electrical signal. The capacitor module 40 may be used for charging and discharging, for example, the capacitor module 40 may be charged according to the instantaneous current signal transmitted by the sensing module 30; the capacitor module 40 can also transmit an instantaneous current signal to the door lock driving module 20 to realize discharging of the door lock driving module 20, thereby realizing control of the door lock driving module 20.

The sensing module 30 is configured to sense the near NFC device 50, and when the sensing module 30 establishes a communication connection with the NFC device 50, the NFC device 50 can transmit an instantaneous current signal to the sensing module 30, and the sensing module 30 obtains the instantaneous current signal. The sensing module 30 transmits the instantaneous current signal to the capacitance module 40 to realize the charging of the capacitance module 40. Based on the capacitor module 40, the door lock driving module 20 is connected, and then the capacitor module 40 can discharge to the door lock driving module 20, so that the door lock driving module 20 is controlled to work, and then the door lock driving module 20 can drive the door lock mechanism 10 to unlock.

In one example, the passive smart door lock may be disposed on a door body of a hotel or a hotel, the NFC device 50 may be a smart card with an NFC function, so that a user carries the smart card, and approaches the smart card to the sensing module 30 of the corresponding door body, when the smart card is in communication connection with the sensing module 30, the smart card can transmit an instantaneous current signal to the sensing module 30, so that the sensing module 30 obtains the instantaneous current signal, the sensing module 30 transmits the instantaneous current signal to the capacitor module 40, so as to realize charging of the capacitor module 40, and then the capacitor module 40 can discharge to the door lock driving module 20, so as to realize controlling the door lock driving module 20 to operate, so that the door lock driving module 20 can drive the door lock mechanism 10 to unlock, so as to realize passive low power consumption.

In one example, the passive smart door lock may be disposed on a door body of a hotel or a hotel, the NFC device 50 may be a mobile terminal (e.g. a mobile phone) with an NFC function, so that a user carries the mobile terminal, and approaches the mobile terminal to the sensing module 30 of the corresponding door body, when the smart card is in communication connection with the sensing module 30, the mobile terminal can transmit an instantaneous current signal to the sensing module 30, so that the sensing module 30 obtains the instantaneous current signal, the sensing module 30 transmits the instantaneous current signal to the capacitor module 40, so as to realize charging of the capacitor module 40, so that the capacitor module 40 can discharge to the door lock driving module 20, so as to realize controlling the door lock driving module 20 to operate, so that the door lock driving module 20 can drive the door lock mechanism 10 to unlock, and thus realizing passive low power consumption.

In the above embodiment, the door lock mechanism 10 is provided on the door body; the door body is provided with a containing cavity, and a first panel of the door body is provided with a first installation area; the door lock driving module 20 is arranged in the accommodating cavity, and the door lock driving module 20 is used for driving the door lock mechanism 10 to unlock; the sensing module 30 is disposed in the first installation area, and the sensing module 30 is configured to be communicatively connected to the NFC device 50; the sensing module 30 is configured to obtain an instantaneous current signal when a communication connection is established with the NFC device 50; the capacitor module 40 is arranged in the accommodating cavity, and the capacitor module 40 is connected between the door lock driving module 20 and the sensing module 30; the capacitor module 40 is configured to control the door lock driving module 20 to operate according to the received instantaneous current signal, so as to realize passive low-power unlocking. According to the method, the sensing module 30, the capacitor module 40 and the door lock driving module 20 are arranged on the door body, the NFC equipment 50 can be carried by a user, when the NFC equipment 50 approaches to the sensing range of the sensing module 30, the NFC equipment 50 carries an instantaneous current signal to establish communication connection with the sensing module 30, and then the instantaneous current signal is generated; the sensing module 30 can transmit the instantaneous current signal to the capacitance module 40 to realize the charging of the capacitance module 40; then discharges to the door lock driving module 20 through the capacitor module 40, and further realizes the control of the door lock driving module 20 to work, so that the door lock driving module 20 drives the door lock mechanism 10 to unlock, and therefore, no additional battery is needed, namely, no battery is needed to be used for supplying power, the passive low power consumption is realized, the cost is reduced, and the energy is saved.

In one embodiment, as shown in fig. 2, the sensing module 30 includes an NFC sensing chip 310; the NFC sensing chip 310 is connected to the capacitive module 40.

The NFC (near field communication) sensing chip may include an antenna. The antenna in NFC inductive chip 310 is a key component to enable communication. When the NFC device 50 is close to the NFC chip, the NFC device 50 generates an electromagnetic field. The electromagnetic field excites the antenna in the NFC sensing chip 310 to generate an instantaneous current signal, so that the NFC sensing chip 310 activates the circuit in the chip by using the instantaneous current signal, thereby realizing that the NFC device 50 and the NFC sensing chip 310 are in communication connection, and the NFC sensing chip 310 obtains the instantaneous current signal, so that the NFC sensing chip 310 can transmit the instantaneous current signal to the capacitor module 40, and the capacitor module 40 is charged. Connect lock drive module 20 based on electric capacity module 40, and then electric capacity module 40 can discharge to lock drive module 20, realizes controlling lock drive module 20 work, and then lock drive module 20 can drive lock mechanism 10 unblank to need not to additionally set up the battery, need not to adopt the battery power supply promptly, realize passive low-power consumption, the cost is reduced has practiced thrift the energy.

In one embodiment, as shown in fig. 3, the door lock driving module 20 includes a motor 210 and a motor driving circuit 220, the motor driving circuit 220 being connected between the motor 210 and the capacitor module 40; the motor 210 is used to drive the door lock mechanism 10 to unlock.

For example, when the capacitor module 40 stores an instantaneous current signal, the capacitor module can discharge to the motor driving circuit 220 to control the motor driving circuit 220 to work, so that the motor driving circuit 220 can transmit a forward rotation signal to the motor 210, and when the motor 210 receives the forward rotation signal, the motor 210 can be driven to rotate forward, and the door body mechanism is driven to unlock.

Based on the connection capacitance of the induction module 30, the motor driving circuit 220 is connected between the motor 210 and the capacitance module 40, the motor 210 is mechanically connected with the door lock mechanism 10, and the induction module 30 is in communication connection with the NFC device 50; when the NFC device 50 establishes a communication connection with the sensing module 30, the sensing module 30 can obtain an instantaneous current signal, and the sensing module 30 transmits an instantaneous battery signal to the capacitive module 40; the capacitor module 40 controls the motor driving circuit 220 to work according to the received instantaneous current signal, so that the motor driving circuit 220 drives the motor 210 to work and drive the motor 210 to rotate forward, and the door lock mechanism 10 is driven to unlock through the motor 210; and passive low-power unlocking is realized.

In the above embodiment, by arranging the sensing module 30, the capacitor module 40 and the door lock driving module 20 on the door body, the user can carry the NFC device 50, and when the NFC device 50 approaches to the sensing range of the sensing module 30, the NFC device 50 carries the instantaneous current signal to establish communication connection with the sensing module 30, so as to generate the instantaneous current signal; the sensing module 30 can transmit the instantaneous current signal to the capacitance module 40 to realize the charging of the capacitance module 40; then discharges to the motor driving circuit 220 through the capacitor module 40, controls the motor driving circuit 220 to work, enables the motor driving circuit 220 to drive the motor 210 to work, drives the motor 210 to rotate forward, and drives the door lock mechanism 10 to unlock through the motor 210, so that a battery is not required to be additionally arranged, namely, the battery is not required to be adopted for power supply, passive low power consumption is realized, the cost is reduced, and the energy is saved.

In one embodiment, as shown in fig. 4, door lock mechanism 10 includes a lock tongue 110 and a lock cylinder 120; lock core 120 is mechanically connected with lock tongue 110, and motor 210 is used for driving lock core 120 to move, so that lock core 120 drives lock tongue 110 to unlock.

The door lock mechanism 10 includes a lock tongue 110 and a lock cylinder 120, and the door lock mechanism 10 further includes a housing, where the lock tongue 110 and the lock cylinder 120 are disposed. Lock cylinder 120 can operate based on the control of door lock driving module 20, and further drive lock tongue 110 to move, so as to realize the unlocking action of door lock mechanism 10.

Illustratively, the door body may be provided with 2 receiving cavities (i.e., a first receiving cavity and a second receiving cavity), wherein the first receiving cavity may be configured to receive the door lock mechanism 10, and the housing of the door lock mechanism 10 covers the periphery of the first receiving cavity; the second receiving chamber may be used to receive the capacitive module 40 and the door lock driving module 20.

In one embodiment, as shown in FIG. 4, the passive smart door lock further includes a reset mechanism 60; the reset mechanism 60 is mechanically connected to the door lock mechanism 10, and the reset mechanism 60 is used for resetting and locking the door lock mechanism 10.

Wherein the reset mechanism 60 may be used to reset and lock the door lock mechanism 10. For example, based on the mechanical connection of the reset mechanism 60 to the door lock mechanism 10, the user may manually operate the reset mechanism 60, such that the reset mechanism 60 drives the door lock mechanism 10 to move along the locking direction, thereby locking the door lock mechanism 10.

In one embodiment, the capacitance module 40 includes at least 2 capacitances, each connected in parallel.

The capacitors may be electrolytic capacitors, and each capacitor is connected in parallel between the sensing module 30 and the door lock driving module 20, so that when the NFC device 50 approaches to the sensing range of the sensing module 30, the NFC device 50 carries an instantaneous current signal to establish communication connection with the sensing module 30, and further generates an instantaneous current signal; the sensing module 30 can transmit the instantaneous current signal to each capacitor to realize the charging of each capacitor; then discharge to lock drive module 20 through each electric capacity, and then realize controlling lock drive module 20 work for lock drive module 20 drives lock mechanism 10 and unblanks, connects in parallel through setting up a plurality of electric capacities, and then has increased the capacity of electric capacity module 40, need not in addition to set up the battery, need not to adopt the battery power supply promptly, realizes passive low-power consumption, the cost is reduced has practiced thrift the energy.

In one embodiment, the passive smart door lock further includes a circuit board including a circuit layer at which the door lock driving module 20, the sensing module 30, and the capacitance module 40 are respectively disposed.

The circuit board may be a PCB circuit board. The circuit package is provided with a circuit layer, the door lock driving module 20, the induction module 30 and the capacitor module 40 are respectively arranged on the circuit layer, wiring is arranged on the circuit layer, and further the capacitor module 40 is connected between the induction module 30 and the door lock driving module 20, when the NFC equipment 50 carried by a user approaches to the induction range of the induction module 30, the NFC equipment 50 carries an instantaneous current signal and establishes communication connection with the induction module 30, and then an instantaneous current signal is generated; the sensing module 30 can transmit the instantaneous current signal to the capacitance module 40 to realize the charging of the capacitance module 40; then discharges to the door lock driving module 20 through the capacitor module 40, and further realizes the control of the door lock driving module 20 to work, so that the door lock driving module 20 drives the door lock mechanism 10 to unlock, and therefore, no additional battery is needed, namely, no battery is needed to be used for supplying power, the passive low power consumption is realized, the cost is reduced, and the energy is saved.

In one embodiment, there is also provided a door lock system comprising an NFC device and a passive smart door lock as defined in any one of the above.

The NFC device may be a room card with NFC functionality, and the NFC device may also be a mobile terminal with NFC functionality, for example, the NFC device may be a smart phone with NFC functionality. For the specific description of the passive smart door lock, reference may be made to the description of the passive smart door lock in the foregoing embodiments, and the description is not repeated here.

Specifically, when the NFC device approaches to the induction range of the induction module, the NFC device carries an instantaneous current signal to establish communication connection with the induction module, so as to generate the instantaneous current signal; the sensing module can transmit the instantaneous current signal to the capacitance module to realize the charging of the capacitance module; then discharge to the motor drive circuit through the electric capacity module, control motor drive circuit work for motor drive circuit drive motor work drives the motor and corotates, thereby drives the lock mechanism through the motor and unblanks, thereby need not to additionally set up the battery, need not to adopt the battery power supply promptly, realizes passive low-power consumption, the cost is reduced has practiced thrift the energy.

In one example, an NFC device includes a mobile terminal body and an NFC unit; the NFC unit is arranged on the mobile terminal main body.

The mobile terminal body may be a smart phone body. For example, the passive intelligent door lock can be arranged on a door body of a hotel or a hotel, the NFC equipment can be a mobile terminal provided with an NFC unit, a user carries the mobile terminal, the mobile terminal is close to an induction module of the corresponding door body, when the intelligent house card and the induction module are in communication connection, the mobile terminal can transmit an instantaneous current signal to the induction module, the induction module obtains the instantaneous current signal, the induction module transmits the instantaneous current signal to the capacitance module, charging of the capacitance module is achieved, the capacitance module can discharge to the door lock driving module, work of the door lock driving module is controlled, and accordingly the door lock driving module can drive a door lock mechanism to unlock, and passive low power consumption is achieved.

In one example, in one of the embodiments, the NFC device further comprises a housing; the casing is card-like structure, and NFC unit sets up in the casing.

For example, the passive intelligent door lock can be arranged on a door body of a hotel or a hotel, the NFC equipment can be an intelligent house card with an NFC function, a user carries the intelligent house card, the intelligent house card is close to an induction module of the corresponding door body, when the intelligent house card and the induction module are in communication connection, the intelligent house card can transmit an instantaneous current signal to the induction module, the induction module obtains the instantaneous current signal, the induction module transmits the instantaneous current signal to the capacitance module, charging of the capacitance module is achieved, the capacitance module can discharge to the door lock driving module, the door lock driving module is controlled to work, the door lock driving module can drive the door lock mechanism to unlock, and passive low power consumption is achieved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A passive smart door lock, comprising:

the door lock mechanism is arranged on the door body; the door body is provided with a containing cavity, and a first panel of the door body is provided with a first installation area;

the door lock driving module is arranged in the accommodating cavity and is used for driving the door lock mechanism to unlock;

the sensing module is arranged in the first installation area and is used for being in communication connection with NFC equipment; the sensing module is configured to obtain an instantaneous current signal when communication connection is established with the NFC equipment;

the capacitive module is arranged in the accommodating cavity and is connected between the door lock driving module and the induction module; the capacitor module is configured to control the door lock driving module to work according to the received instantaneous current signal.

2. The passive smart door lock of claim 1, wherein the sensing module comprises an NFC sensing chip;

the NFC sensing chip is connected with the capacitor module.

3. The passive smart door lock of claim 1, wherein the door lock drive module comprises a motor and a motor drive circuit, the motor drive circuit connected between the motor and the capacitive module; the motor is used for driving the door lock mechanism to unlock.

4. A passive smart door lock according to claim 3, wherein the door lock mechanism comprises a locking bolt and a lock cylinder;

the lock core is mechanically connected with the lock tongue, and the motor is used for driving the lock core to move so that the lock core drives the lock tongue to unlock.

5. The passive smart door lock of claim 1, further comprising a reset mechanism; the reset mechanism is mechanically connected with the door lock mechanism and is used for resetting and locking the door lock mechanism.

6. The passive smart door lock of claim 1, wherein the capacitive module comprises at least 2 capacitors, each of the capacitors connected in parallel.

7. The passive smart door lock of claim 1, further comprising a circuit board including a circuit layer, the door lock drive module, the sense module, and the capacitance module being disposed on the circuit layer, respectively.

8. A door lock system comprising an NFC device and a passive smart door lock as claimed in any one of claims 1 to 7.

9. The door lock system according to claim 8, wherein the NFC device includes a mobile terminal body and an NFC unit; the NFC unit is arranged on the mobile terminal main body.

10. The door lock system of claim 9, wherein the NFC device further comprises a housing; the shell is of a card-shaped structure.