Crash relieving circuit of intelligent door lock

Abstract

The utility model discloses a crash relieving circuit of an intelligent door lock. The crash relieving circuit comprises an interface module, a power supply module, a power-off module and a discharge module, the interface module is electrically connected with the power supply module and used for connecting an external power supply; the interface module is also electrically connected with the power-off module; the power-off module is electrically connected with the discharging module; the power-off module and the discharging module are further electrically connected with the power module, the power-off module is used for powering off a power chip of the power module, and the discharging module is used for discharging a power source to enable the main chip to be powered off. By arranging the power-off module and the discharging module, when the intelligent door lock is halted, the power-off module and the discharging module can be started through an external power supply to cut off power and re-power on the power supply module and the main chip, a user can normally unlock the lock by adopting a secret key, and convenience is provided for the user.

Description

Technical Field

[0001] This utility model relates to the field of smart door lock technology, and in particular to a crash-clearing circuit for a smart door lock. Background Technology

[0002] With the continuous advancement of technology and the development of society, the functions of smart locks are becoming increasingly rich. However, most smart locks are prone to malfunctions during long-term use, such as being frozen due to excessive static electricity in winter or strong pulse interference. These malfunctions can sometimes be resolved by resetting the main control MCU, but in some cases, resetting the MCU may not restore the smart lock to normal operation. Currently, when a smart lock malfunctions, it cannot be opened with an electronic key. Furthermore, most users keep their emergency keys at home, making it impossible to open the lock in this situation. Utility Model Content

[0003] When existing smart door locks malfunction, they cannot be opened with a key, causing inconvenience to users.

[0004] To address the aforementioned issues, a crash recovery circuit for smart locks is proposed. By incorporating a power-off module and a discharge module, when the smart lock crashes, an external power supply can activate these modules to power off and then power on the power module and main chip, allowing users to unlock the lock normally using their key, thus providing convenience for users.

[0005] A crash recovery circuit for a smart door lock includes:

[0006] Interface module;

[0007] Power module;

[0008] Power-off module;

[0009] Discharge module;

[0010] The interface module is electrically connected to the power module and is used to connect to an external power source;

[0011] The interface module is also electrically connected to the power-off module;

[0012] The power-off module is electrically connected to the discharge module;

[0013] The power-off module and the discharge module are also electrically connected to the power module. The power-off module is used to power off the power chip of the power module, and the discharge module is used to discharge the power supply to power off the main chip.

[0014] In conjunction with the crash-clearing circuit of the smart door lock described in this utility model, in a first possible embodiment, the interface module includes:

[0015] External interface circuit;

[0016] and voltage regulator unit;

[0017] The external interface circuit is electrically connected to the voltage regulator unit, and the voltage regulator unit is electrically connected to the power supply module.

[0018] In conjunction with the first possible embodiment of this utility model, and in the second possible embodiment, the power supply module includes:

[0019] First filtering unit;

[0020] Power chip;

[0021] Second filtering unit;

[0022] The first filter unit, the power chip, and the second filter unit are electrically connected in sequence.

[0023] In conjunction with the second possible embodiment of this utility model, and in the third possible embodiment, the power-off module includes:

[0024] Leakage protection unit;

[0025] Charging unit;

[0026] First switching unit;

[0027] One end of the leakage protection unit is electrically connected to the input end of the voltage regulator unit and the charging unit. The output end of the charging unit is electrically connected to the first end of the first switch unit. The second end of the first switch unit and the other end of the leakage protection unit are connected together and grounded. The third end of the first switch unit is electrically connected to the power chip and the discharge module.

[0028] In conjunction with the third and fourth possible embodiments of this utility model, the discharge module includes:

[0029] Pull-up unit;

[0030] Second switching unit;

[0031] Voltage regulator capacitor unit;

[0032] Discharge resistor unit;

[0033] The input terminal of the pull-up unit is electrically connected to the third terminal of the first switch unit and the first terminal of the second switch unit. The second terminal of the second switch unit is electrically connected to the output power of the power module and the first terminal of the voltage regulator unit. The third terminal of the second switch unit is electrically connected to the first terminal of the discharge resistor unit. The second terminal of the voltage regulator unit and the second terminal of the discharge resistor unit are connected together and then grounded.

[0034] In conjunction with the fourth and fifth possible embodiments of this utility model, the power chip includes: an input pin, an enable pin, and an output pin;

[0035] The input pin is electrically connected to the interface module and the first filter unit, the enable pin is electrically connected to the third terminal of the first switch unit, and the output pin is electrically connected to the second filter unit.

[0036] In conjunction with the fourth possible implementation of this utility model, in the sixth possible implementation, the leakage protection unit includes a discharge resistor, the charging unit includes a charging capacitor, one end of the discharge resistor is electrically connected to the interface module and one end of the charging capacitor respectively, the other end of the discharge resistor is connected to the second end of the first switch unit and then grounded, and the other end of the charging capacitor is electrically connected to the first end of the first switch unit.

[0037] In conjunction with the sixth and seventh possible embodiments of this utility model, the first switching unit includes:

[0038] The device includes a pull-down resistor and a first transistor. One end of the pull-down resistor is electrically connected to the gate of the first transistor, and the other end is connected to the source of the first transistor and then grounded. The drain of the first transistor is electrically connected to the enable pin of the power chip.

[0039] In conjunction with the fourth possible implementation of this utility model, in the eighth possible implementation, the pull-up unit includes a pull-up resistor, the second switching unit includes a second transistor, one end of the pull-up resistor is electrically connected to the drain of the first transistor, the other end is electrically connected to the source of the second transistor, the gate of the second transistor is electrically connected to the voltage regulator capacitor unit, and the drain is electrically connected to the discharge resistor unit.

[0040] The deadlock release circuit of this utility model for smart door locks, by setting up a power-off module and a discharge module, can disconnect and re-energize the power module and main chip by external power supply when the smart door lock malfunctions. Users can then unlock the door normally using the key, providing convenience for users. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a module structure diagram of a crash-clearing circuit for an intelligent door lock according to this utility model;

[0043] Figure 2 This is a circuit diagram of the crash recovery circuit for the smart door lock in this utility model.

[0044] Components and their serial numbers:

[0045] 100 – Interface module, 200 – Power supply module, 300 – Power-off module, 400 – Discharge module. Detailed Implementation

[0046] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this utility model.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] When existing smart door locks malfunction, they cannot be opened with a key, causing inconvenience to users.

[0052] To address the above problems, a crash-clearing circuit for smart door locks is proposed.

[0053] A crash recovery circuit for a smart door lock, such as Figure 1 , Figure 1 This is a modular structure diagram of a crash-clearing circuit for a smart door lock according to this utility model. It includes an interface module 100, a power supply module 200, a power-off module 300, and a discharge module 400. The interface module 100 is electrically connected to the power supply module 200 for connecting to an external power source. The interface module 100 is also electrically connected to the power-off module 300. The power-off module 300 is electrically connected to the discharge module 400. Both the power-off module 300 and the discharge module 400 are also electrically connected to the power supply module 200. The power-off module 300 is used to disconnect the power supply chip of the power supply module 200, and the discharge module 400 is used to discharge the power supply, thus disconnecting the main chip. By setting up the power-off module 300 and the discharge module 400, when the smart door lock crashes, the power-off module 300 and the discharge module 400 can be activated by an external power source to disconnect and reconnect the power supply module 200 and the main chip, allowing the user to unlock the door normally using a key, providing convenience for the user.

[0054] In this embodiment, the power module 200 outputs a power supply voltage (M3V3A) to power the electronic control of the smart door lock. Upon receiving external power, the power-off module 300 disconnects the power chip of the power module 200, and the discharge module 400 discharges the output power supply voltage (M3V3A) after the power chip is disconnected.

[0055] Furthermore, the interface module 100 includes an external interface circuit and a voltage regulator unit; the external interface circuit is electrically connected to the voltage regulator unit, and the voltage regulator unit is electrically connected to the power supply module 200. The voltage regulator unit can be a Zener diode D1, and the interface module 100 can be powered by a 5V power input.

[0056] Furthermore, the power module 200 includes a first filter unit, a power chip, and a second filter unit; the first filter unit, the power chip, and the second filter unit are electrically connected in sequence. The first filter unit includes capacitors (C1, C2, C3, C4), and the second filter unit includes capacitor C5.

[0057] Furthermore, the power-off module 300 includes a leakage protection unit, a charging unit, and a first switching unit; one end of the leakage protection unit is electrically connected to the input end of the voltage regulator unit and the charging unit, the output end of the charging unit is electrically connected to the first end of the first switching unit, the second end of the first switching unit and the other end of the leakage protection unit are connected together and grounded, and the third end of the first switching unit is electrically connected to the power chip and the discharge module 400.

[0058] Specifically, the power chip U1 includes: input pin IN, enable pin EN, and output pin OUT;

[0059] The input pin IN is electrically connected to the interface module 100 and the first filter unit, the enable pin EN is electrically connected to the third terminal of the first switch unit, and the output pin OUT is electrically connected to the second filter unit.

[0060] like Figure 2 , Figure 2 This is a circuit diagram of the deadlock release circuit of the smart door lock in this utility model; the leakage protection unit includes a discharge resistor R2, the charging unit includes a charging capacitor C7, one end of the discharge resistor R2 is electrically connected to the interface module 100 and one end of the charging capacitor C7 respectively, the other end of the discharge resistor R2 is connected to the second end of the first switch unit and then grounded, and the other end of the charging capacitor C7 is electrically connected to the first end of the first switch unit.

[0061] Specifically, the first switching unit includes a pull-down resistor R3 and a first transistor Q1. One end of the pull-down resistor R3 is electrically connected to the gate of the first transistor Q1, and the other end is connected to the source of the first transistor Q1 and then grounded. The drain of the first transistor Q1 is electrically connected to the enable pin EN of the power chip U3.

[0062] Furthermore, the discharge module 400 includes a pull-up unit, a second switching unit, a voltage regulator capacitor unit, and a discharge resistor unit; the input terminal of the pull-up unit is electrically connected to the third terminal of the first switching unit and the first terminal of the second switching unit; the second terminal of the second switching unit is electrically connected to the output power of the power module 200 and the first terminal of the voltage regulator capacitor unit; the third terminal of the second switching unit is electrically connected to the first terminal of the discharge resistor unit; and the second terminals of the voltage regulator capacitor unit and the discharge resistor unit are connected together and then grounded.

[0063] Specifically, such as Figure 2 The pull-up unit includes a pull-up resistor R3, and the second switching unit includes a second transistor Q2. One end of the pull-up resistor R3 is electrically connected to the drain of the first transistor Q2, and the other end is electrically connected to the source of the second transistor Q2. The gate of the second transistor Q2 is electrically connected to the voltage regulator capacitor unit, and the drain is electrically connected to the discharge resistor unit.

[0064] like Figure 2 The voltage regulator capacitor unit includes capacitors (C8, C9), and the discharge resistor unit includes resistors (R4, R5, R6).

[0065] The principle behind the termination of this application is as follows:

[0066] Power-off module 300: After the interface module 100 is powered on, capacitor C7 starts charging. During the charging process, transistor Q1 is turned on, pulling the EN pin of power chip U3 low, and power chip U3 is powered off.

[0067] Discharge module 400: When transistor Q1 is turned on, the second transistor Q2 is turned on, all the filter capacitors on M3V3A are discharged, the main chip loses power and then disconnects from the power supply.

[0068] When capacitor C7 is fully charged, transistor Q1 is not conducting, the EN pin of power chip U3 is pulled high, the second transistor Q2 is turned off, and the main chip is powered normally.

[0069] The deadlock release circuit of the smart door lock in this utility model is implemented by setting up a power-off module 300 and a discharge module 400. When the smart door lock is dead, the power-off module 300 and the discharge module 400 can be activated by an external power supply to cut off and re-energize the power module 200 and the main chip. Users can then unlock the door normally using the key, which provides convenience for users.

[0070] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dead machine release circuit of an intelligent door lock, characterized in that comprising: an interface module; a power module; a power-off module; a discharge module; the interface module is electrically connected with the power module, and is used for connecting an external power supply; the interface module is further electrically connected with the power-off module; the power-off module is electrically connected with the discharge module; the power-off module and the discharge module are further respectively electrically connected with the power module, the power-off module is used for powering off a power supply chip of the power module, and the discharge module is used for discharging the power supply, so that the main chip is powered off.

2. The deadbolt override circuit of an intelligent door lock of claim 1, wherein, the interface module comprises: an external interface circuit; and a voltage stabilizing unit; the external interface circuit is electrically connected with the voltage stabilizing unit, and the voltage stabilizing unit is electrically connected with the power module.

3. The deadbolt override circuit of an intelligent door lock of claim 2, wherein, the power module comprises: a first filter unit; a power supply chip; a second filter unit; the first filter unit, the power supply chip and the second filter unit are sequentially electrically connected.

4. The deadbolt override circuit of claim 3, wherein, the power-off module comprises: an anti-creeping unit; a charging unit; a first switch unit; one end of the anti-creeping unit is electrically connected with the voltage stabilizing unit and the input end of the charging unit, the output end of the charging unit is electrically connected with the first end of the first switch unit, the second end of the first switch unit and the other end of the anti-creeping unit are commonly connected and grounded, and the third end of the first switch unit is electrically connected with the power supply chip and the discharge module.

5. The deadbolt override circuit of claim 4, wherein, the discharge module comprises: a pull-up unit; a second switch unit; a voltage stabilizing capacitor unit; a discharge resistor unit; the input end of the pull-up unit is electrically connected with the third end of the first switch unit and the first end of the second switch unit, the second end of the second switch unit is electrically connected with the output power supply of the power module and the first end of the voltage stabilizing capacitor unit, the third end of the second switch unit is electrically connected with the first end of the discharge resistor unit, and the second end of the voltage stabilizing capacitor unit and the second end of the discharge resistor unit are commonly connected and grounded.

6. The deadbolt override circuit of claim 5, wherein the override switch is a push button switch. the power supply chip comprises: an input pin, an enable pin and an output pin; the input pin is electrically connected with the interface module and the first filter unit, the enable pin is electrically connected with the third end of the first switch unit, and the output pin is electrically connected with the second filter unit.

7. The deadbolt override circuit of claim 5, wherein the override switch is a push button switch. the anti-creeping unit comprises a discharge resistor, and the charging unit comprises a charging capacitor, one end of the discharge resistor is respectively electrically connected with the interface module and one end of the charging capacitor, the other end of the discharge resistor is commonly connected with the second end of the first switch unit and grounded, and the other end of the charging capacitor is electrically connected with the first end of the first switch unit.

8. The deadbolt override circuit of claim 7, wherein, the first switch unit comprises: a pull-down resistor and a first triode, one end of the pull-down resistor is electrically connected with the gate of the first triode, the other end of the pull-down resistor is commonly connected with the source of the first triode and grounded, and the drain of the first triode is electrically connected with the enable pin of the power supply chip.

9. The deadbolt override circuit of an intelligent door lock of claim 8, wherein, The pull-up unit comprises a pull-up resistor, and the second switch unit comprises a second triode, one end of the pull-up resistor is electrically connected with the drain of the first triode, the other end is electrically connected with the source of the second triode, the gate of the second triode is electrically connected with the voltage stabilizing capacitor unit, and the drain is electrically connected with the discharge resistor unit.

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