Low-power-consumption wireless intelligent lock

Abstract

The utility model discloses a low-power-consumption wireless intelligent lock, which comprises a lock piece, a wireless module and a wireless module, the main control circuit is connected with the lock piece, and the main control circuit is used for outputting an unlocking signal to control the lock piece to enter an unlocking state and outputting a locking signal to control the lock piece to enter a locking state; a first power supply output end of the power supply circuit is connected with a power supply end of the main control circuit; the power supply end of the low-power-consumption Bluetooth control circuit is connected with the second power supply output end of the power supply circuit, the control end of the low-power-consumption Bluetooth control circuit is connected with the controlled end of the power supply circuit, and when the low-power-consumption Bluetooth control circuit detects a broadcast signal, the power supply circuit is controlled to supply power to the main control circuit. And when the broadcast signal is not detected, controlling the power supply circuit to stop supplying power to the main control circuit so as to enable the main control circuit to be powered down. The low-power-consumption wireless intelligent lock disclosed by the utility model realizes low-power-consumption operation.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent door locks, and particularly relates to a low-power wireless intelligent lock. Background Art

[0002] An intelligent door lock refers to a lock improved on the basis of a traditional mechanical lock, which is more intelligent and simpler in terms of user security, identification, and management. An intelligent door lock is an actuating component for locking the door in an access control system.

[0003] In some application scenarios, high requirements are put forward for the power consumption of intelligent door locks, such as intelligent door locks on vehicles; at present, when the intelligent door lock is not in use, the internal controller keeps working, resulting in a problem of high power consumption. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a low-power wireless intelligent lock, aiming to reduce the power consumption of the low-power wireless intelligent lock when it is not in use.

[0005] To achieve the above purpose, the utility model provides a low-power wireless intelligent lock, including:

[0006] A locking member, having an unlocking state and a locking state;

[0007] A main control circuit, connected to the locking member, the main control circuit is used to output an unlocking signal to control the locking member to enter the unlocking state, and output a locking signal to control the locking member to enter the locking state;

[0008] A power supply circuit, its first power output terminal is connected to the power supply terminal of the main control circuit;

[0009] A low-power Bluetooth control circuit, its power supply terminal is connected to the second power output terminal of the power supply circuit, the control terminal of the low-power Bluetooth control circuit is connected to the controlled terminal of the power supply circuit, when the low-power Bluetooth control circuit detects a broadcast signal, it controls the power supply circuit to supply power to the main control circuit, and when the broadcast signal is not detected, it controls the power supply circuit to stop supplying power to the main control circuit, so that the main control circuit loses power.

[0010] In some embodiments, the power supply circuit includes:

[0011] A power supply circuit, used to output a power supply;

[0012] A switch circuit, its controlled terminal is connected to the low-power Bluetooth control circuit, the input terminal of the switch circuit accesses the power supply, and the output terminal of the switch circuit is connected to the power supply terminal of the main control circuit.

[0013] In some embodiments, the switch circuit includes:

[0014] The first switching transistor, with its input terminal connected to the power supply, the output terminal of the first switching transistor connected to the power supply terminal of the main control circuit, and the controlled terminal of the first switching transistor connected to the control terminal of the low-power Bluetooth control circuit.

[0015] In some embodiments, the first switching transistor is a PMOS transistor, and the switching circuit further includes: a second switching transistor, which is a PMOS transistor; wherein, the drain of the first switching transistor is connected to the power supply, the source of the first switching transistor is connected to the source of the second switching transistor, the drain of the second switching transistor is connected to the power supply terminal of the main control circuit, and the gates of the first switching transistor and the second switching transistor are connected to the control terminal of the low-power Bluetooth control circuit.

[0016] In some embodiments, the switching circuit further includes:

[0017] A third switching transistor, with its input terminal grounded, the output terminal of the third switching transistor, the gate of the first switching transistor, and the gate of the second switching transistor interconnected, and the controlled terminal of the third switching transistor connected to the control terminal of the low-power Bluetooth control circuit.

[0018] In some embodiments, the switching circuit further includes:

[0019] A pull-down resistor, with one end of the pull-down resistor connected to the controlled terminal of the third switching transistor and the other end grounded.

[0020] In some embodiments, the low-power wireless intelligent lock further includes:

[0021] A key for receiving external pressing;

[0022] A trigger circuit connected to the key, and the trigger circuit is used to control the power supply circuit to supply power to the main control circuit when the key is pressed.

[0023] In some embodiments, the key is a numeric keypad, and the numeric keypad is also connected to the main control circuit;

[0024] The main control circuit is further configured to control the lock to enter the unlocked state when receiving the correct password input by the numeric keypad.

[0025] In some embodiments, the main control circuit is connected to the low-power Bluetooth control circuit through serial communication, so as to control the lock to enter the unlocked state when receiving an unlock signal through the low-power Bluetooth control circuit.

[0026] In some embodiments, the serial communication is SPI communication.

[0027] The low-power wireless intelligent lock of the present application is powered by a power circuit continuously for a low-power Bluetooth control circuit. However, since low-power Bluetooth is used, the power consumption is very low. And the low-power Bluetooth control circuit can continuously monitor the broadcast signals in the environment to control the power circuit to supply power to the main control circuit when the user requests Bluetooth communication to wake up the main control circuit. In other working conditions, the low-power Bluetooth control circuit can switch the power supply of the main control circuit to make the MCU completely stop working, reducing the power consumption caused by the internal current and lowering the power consumption of the wireless intelligent lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0029] Figure 1 It is a schematic structural diagram of an embodiment of the low-power wireless intelligent lock of the present invention;

[0030] Figure 2 It is a schematic structural diagram of another embodiment of the low-power wireless intelligent lock of the present invention;

[0031] Figure 3 It is a schematic structural diagram of yet another embodiment of the low-power wireless intelligent lock of the present invention.

[0032] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] The present utility model provides a low-power intelligent door lock circuit, aiming to reduce the power consumption of the wireless intelligent lock and improve its battery life.

[0036] Referring to Figure 1 is a schematic structural diagram of an embodiment of the low-power intelligent door lock circuit of the present utility model; in the embodiment of the present utility model, the low-power wireless intelligent lock includes:

[0037] A lock member 10, having an unlocked state and a locked state;

[0038] A main control circuit 20, connected to the lock member 10, the main control circuit 20 is used to output an unlocking signal to control the lock member 10 to enter the unlocked state, and output a locking signal to control the lock member 10 to enter the locked state;

[0039] A power supply circuit 30, whose first power output terminal is connected to the power supply terminal of the main control circuit 20;

[0040] A low-power Bluetooth control circuit 40, whose power supply terminal is connected to the second power output terminal of the power supply circuit 30, the control terminal of the low-power Bluetooth control circuit 40 is connected to the controlled terminal of the power supply circuit 30. When the low-power Bluetooth control circuit 40 detects a broadcast signal, it controls the power supply circuit 30 to supply power to the main control circuit 20, and when it does not detect the broadcast signal, it controls the power supply circuit 30 to stop supplying power to the main control circuit 20, so that the main control circuit 20 loses power.

[0041] Wherein, the specific structure of the lock member 10 is not limited herein. Exemplarily, the lock member 10 includes: a motor, a locking structure, and a motor drive circuit. The main control circuit 20 only needs to control the motor drive circuit to achieve the switching of the lock member 10 between the locked state and the unlocked state. This is a conventional design of an intelligent door lock.

[0042] The main control circuit 20 can be a microcontroller (Microcontroller Unit, MCU). The MCU can output an unlocking signal and a locking signal, which is also a conventional design of an intelligent door lock and will not be elaborated herein.

[0043] The power supply circuit 30 may include a battery, a battery management circuit, and a switch circuit 32 for controlling the battery output.

[0044] The low-power Bluetooth control circuit 40 may include a low-power Bluetooth chip, which can be connected to the power supply circuit 30 to control the power supply of the main control circuit 20, and can also be communicatively connected to the main control circuit 20 so that the main control circuit 20 can perform Bluetooth communication with external devices.

[0045] In this embodiment, the power supply circuit 30 continuously supplies power to the low-power Bluetooth control circuit 40. However, because low-power Bluetooth is used, the power consumption is very low. And the low-power Bluetooth control circuit 40 can continuously monitor the broadcast signals in the environment to control the power supply circuit 30 to supply power to the main control circuit 20 when a user requests Bluetooth communication, so as to wake up the main control circuit 20. In other working conditions, the low-power Bluetooth control circuit 40 can switch the power supply of the main control circuit 20 to make the MCU completely stop working, reduce the power consumption caused by the internal current, and lower the power consumption of the wireless intelligent lock.

[0046] Refer to Figure 2 , in some embodiments, the power supply circuit 30 includes:

[0047] A power supply circuit 31 for outputting a power supply;

[0048] A switch circuit 32, whose controlled end is connected to the low-power Bluetooth control circuit 40. The input end of the switch circuit 32 accesses the power supply, and the output end of the switch circuit 32 is connected to the power supply end of the main control circuit 20.

[0049] In this embodiment, the power supply circuit 31 continuously supplies power to the low-power Bluetooth control circuit 40 through the diode D1, so that it can continuously work, monitor the broadcast signals in the environment, and control the switch circuit 32 to be in a conducting state or a disconnected state according to the broadcast signals.

[0050] In this embodiment, the power supply circuit 31 is connected to the main control circuit 20 through the switch circuit 32, and the controlled end of the switch circuit 32 is connected to the low-power Bluetooth control circuit 40 to supply power to the main control circuit 20 or stop supplying power to the main control circuit 20 to reduce the power consumption under the control of the low-power Bluetooth control circuit 40.

[0051] Continue to refer to Figure 2 , in some embodiments, the switch circuit 32 includes:

[0052] A first switching transistor Q1, whose input end accesses the power supply. The output end of the first switching transistor Q1 is connected to the power supply end of the main control circuit 20, and the controlled end of the first switching transistor Q1 is connected to the control end of the low-power Bluetooth control circuit 40.

[0053] In this embodiment, the first switching transistor Q1 can be one of a triode, a MOS transistor, and an IGBT. Exemplarily, a MOS transistor can be selected as the first switching transistor Q1.

[0054] Referring to Figure 2 , in some embodiments, the first switching transistor Q1 is a PMOS transistor, and the switching circuit 32 further includes: a second switching transistor Q2, where the second switching transistor Q2 is a PMOS transistor; wherein, the drain of the first switching transistor Q1 is connected to the power supply, the source of the first switching transistor Q1 is connected to the source of the second switching transistor Q2, the drain of the second switching transistor Q2 is connected to the power supply terminal of the main control circuit 20, and the gates of the first switching transistor Q1 and the second switching transistor Q2 are connected to the control terminal of the low-power Bluetooth control circuit 40.

[0055] It should be noted that since the first switching transistor Q1 is a PMOS transistor, the parasitic diode allows current to flow from the drain to the source, but not from the source to the drain. Similarly, since the second switching transistor Q2 is a PMOS transistor, the parasitic diode allows current to flow from the drain to the source, but not from the source to the drain. Therefore, when the first switching transistor Q1 and the second switching transistor Q2 are in the off state, current cannot flow from the power supply circuit 31 to the main control circuit 20, nor can it flow from the main control circuit 20 to the power supply circuit 31, realizing the protection of the power supply circuit 31.

[0056] In some embodiments, the switching circuit 32 further includes:

[0057] a third switching transistor Q3, where the input terminal of the third switching transistor Q3 is grounded, the output terminal of the third switching transistor Q3, the gate of the first switching transistor Q1, and the gate of the second switching transistor Q2 are interconnected, and the controlled terminal of the third switching transistor Q3 is connected to the control terminal of the low-power Bluetooth control circuit 40.

[0058] In this embodiment, the third switching transistor Q3 can be one of a triode, a MOS transistor, and an IGBT. Exemplarily, a MOS transistor can be selected as the third switching transistor Q3.

[0059] In this embodiment, the third switching transistor Q3 is used to control the first switching transistor Q1 and the second switching transistor Q2. When the third switching transistor Q3 is turned on, the gates of the first switching transistor Q1 and the second switching transistor Q2 can be grounded, thereby greatly pulling down the gate voltages of the first switching transistor Q1 and the second switching transistor Q2, reducing the on-resistances of the first switching transistor Q1 and the second switching transistor Q2, and reducing the power supply loss.

[0060] Referring to Figure 2 , in some embodiments, the switching circuit 32 further includes:

[0061] A pull-down resistor R1, one end of the pull-down resistor R1 is connected to the controlled end of the third switching transistor Q3, and the other end of the pull-down resistor R1 is grounded.

[0062] In this embodiment, the pull-down resistor R1 can pull down the voltage at the controlled end of the third switching transistor Q3, preventing the third switching transistor Q3 from being accidentally turned on due to interference signals.

[0063] The following combines Figure 2 , and explains the working principle of the switching circuit 32:

[0064] When the low-power Bluetooth control circuit 40 outputs a high-level signal (unlock signal), the third switching transistor Q3 conducts, thereby pulling down the gate voltages of the first switching transistor Q1 and the second switching transistor Q2, causing the first switching transistor Q1 and the second switching transistor Q2 to conduct successively, and the power supply circuit supplies power to the main control circuit 20; when the low-power Bluetooth control circuit 40 outputs a low-level signal (lock signal), the third switching transistor Q3 cuts off, and the pull-up resistor R2 pulls up the gate voltages of the first switching transistor Q1 and the second switching transistor Q2, causing the first switching transistor Q1 and the second switching transistor Q2 to disconnect, and the power supply circuit 31 stops supplying power to the main control circuit 20.

[0065] Referring to Figure 3 , in some embodiments, the low-power wireless smart lock further includes:

[0066] A button for receiving an external press;

[0067] A trigger circuit, connected to the button, the trigger circuit is used to control the power supply circuit 30 to supply power to the main control circuit 20 when the button is pressed.

[0068] Among them, the trigger signal may include a button switch circuit 32. The input end of the button switch circuit 32 is connected to a high level, and the output end is connected to the controlled end of the third switching transistor Q3. Pressing the button can achieve the conduction of the third switching transistor Q3 and realize the artificial wake-up of the main control circuit 20 to power on.

[0069] Referring to Figure 3 , in some embodiments, the button is a numeric keypad 50, and the numeric keypad 50 is also connected to the main control circuit 20;

[0070] The main control circuit 20 is further configured to control the lock 10 to enter an unlocked state when receiving a correct password input by the numeric keypad 50.

[0071] In this embodiment, the user first triggers through the button to power on the main control circuit 20, and then inputs the unlock password on the numeric keypad 50. When the main control circuit 20 recognizes that the unlock password is correct, it controls the lock 10 to enter the unlocked state, realizing the low-power detection of the unlock password.

[0072] In some embodiments, the main control circuit 20 is connected to the low-power Bluetooth control circuit 40 through serial communication, so as to control the lock 10 to enter the unlocked state when an unlocking signal is received through the low-power Bluetooth control circuit 40.

[0073] After the Bluetooth is communicatively connected to an external device, such as a smart terminal or a remote controller, an unlocking verification signal is obtained from the smart terminal or the remote controller. When the verification is correct, the main control circuit 20 controls the lock to be unlocked.

[0074] Exemplarily, the serial communication is SPI communication.

[0075] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields shall be included in the patent protection scope of the present invention.

Claims

1. A low-power wireless intelligent lock, characterized in that, Comprising: A locking member having an unlocked state and a locked state; A main control circuit connected to the locking member, the main control circuit being configured to output an unlocking signal to control the locking member to enter the unlocked state and output a locking signal to control the locking member to enter the locked state; A power supply circuit, a first power output terminal of which is connected to a power supply terminal of the main control circuit; A low-power Bluetooth control circuit, a power supply terminal of which is connected to a second power output terminal of the power supply circuit, a control terminal of the low-power Bluetooth control circuit is connected to a controlled terminal of the power supply circuit, when the low-power Bluetooth control circuit detects a broadcast signal, it controls the power supply circuit to supply power to the main control circuit, and when the broadcast signal is not detected, it controls the power supply circuit to stop supplying power to the main control circuit so that the main control circuit loses power.

2. The low-power wireless intelligent lock according to claim 1, characterized in that, The power supply circuit includes: A power supply circuit for outputting a power supply; A switching circuit, a controlled terminal of which is connected to the low-power Bluetooth control circuit, an input terminal of the switching circuit accesses the power supply, and an output terminal of the switching circuit is connected to a power supply terminal of the main control circuit.

3. The low-power wireless intelligent lock according to claim 2, wherein The switching circuit includes: A first switching transistor, an input terminal of which accesses the power supply, an output terminal of the first switching transistor is connected to a power supply terminal of the main control circuit, and a controlled terminal of the first switching transistor is connected to a control terminal of the low-power Bluetooth control circuit.

4. The low-power wireless intelligent lock according to claim 3, wherein The first switching transistor is a PMOS transistor, and the switching circuit further includes: a second switching transistor, the second switching transistor is a PMOS transistor; wherein, a drain of the first switching transistor accesses the power supply, a source of the first switching transistor is connected to a source of the second switching transistor, a drain of the second switching transistor is connected to a power supply terminal of the main control circuit, and gates of the first switching transistor and the second switching transistor are connected to a control terminal of the low-power Bluetooth control circuit.

5. The low-power wireless intelligent lock according to claim 4, characterized in that, The switching circuit further includes: A third switching transistor, an input terminal of the third switching transistor is grounded, an output terminal of the third switching transistor, a gate of the first switching transistor, and a gate of the second switching transistor are interconnected, and a controlled terminal of the third switching transistor is connected to a control terminal of the low-power Bluetooth control circuit.

6. The low-power wireless intelligent lock according to claim 5, characterized in that, The switching circuit further includes: A pull-down resistor, one end of the pull-down resistor is connected to a controlled terminal of the third switching transistor, and the other end of the pull-down resistor is grounded.

7. The low-power wireless intelligent lock according to claim 1, characterized in that, Further comprising: A key for receiving an external press; A trigger circuit connected to the key, the trigger circuit being configured to control the power supply circuit to supply power to the main control circuit when the key is pressed.

8. The low-power wireless intelligent lock according to claim 7, wherein, The key is a numeric keypad, and the numeric keypad is also connected to the main control circuit; The main control circuit is further configured to control the locking member to enter the unlocked state when receiving a correct password input by the numeric keypad.

9. The low-power wireless intelligent lock according to claim 8, wherein The main control circuit is connected to the low-power Bluetooth control circuit through serial communication, so as to control the locking member to enter the unlocked state when receiving an unlocking signal through the low-power Bluetooth control circuit.

10. The low-power wireless intelligent lock according to claim 9, characterized in that, The serial communication is SPI communication.

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