Motor adjusting device and intelligent lock

Abstract

The utility model relates to motor adjusting technical field discloses a motor adjusting device and intelligent lock, and the device includes: induction module, control circuit module and motor drive module, wherein, the output of induction module is connected with the input of control circuit module, and the output of control circuit module is connected with the input of motor drive module, the intelligent lock includes: lock body, motor, bolt mechanism and motor adjusting device, wherein, motor, bolt mechanism and motor adjusting device all set up in the inside of lock body, the output of motor adjusting device is connected with the input of motor, and the output of motor is connected with bolt mechanism, the utility model discloses the module cascade of motor adjusting device's structure and with motor, lock body's structure of bolt integration, realize door body subsidence detection and motor voltage dynamic adaptation, guarantee the sinking door to open and close simultaneously, and normal door operation has low power consumption and silence.

Description

Technical Field

[0001] This utility model relates to the field of motor adjustment technology, specifically to a motor adjustment device and a smart lock. Background Technology

[0002] The mechanical transmission structure of smart locks is mainly based on a DC motor and a reduction gear, which drives the lock cylinder or drive shaft to extend and retract the bolt, thereby completing the opening and closing action. However, during long-term use, the door may sag due to its own weight and installation factors. Increased friction between the door and the door frame is transmitted to the bolt, requiring the motor to output more torque to ensure the lock operates normally. In existing technologies, to adapt to the needs of sag doors, higher-specification motors and gearboxes are generally used to increase output torque. However, this structural design has significant shortcomings: First, the continuous high torque output of high-specification motors and gearboxes significantly increases power consumption, resulting in a substantial reduction in the battery life of battery-powered smart locks, and even doors that have not sagged must bear unnecessary high power consumption; second, the high-torque motor components generate considerable noise during operation, affecting the quietness of the entrance door usage environment and reducing the user experience. Utility Model Content

[0003] This utility model provides a motor adjustment device and a smart lock. By cascading the motor adjustment device modules and integrating it with the motor and bolt into the lock body, the door sinking detection and dynamic motor voltage adaptation are achieved. This ensures that while the sinking door is locked and unlocked, normal door operation is also characterized by low power consumption and quiet operation.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] In a first aspect, this utility model provides a motor adjustment device, which includes: a sensing module, a control circuit module, and a motor drive module, wherein the output terminal of the sensing module is connected to the input terminal of the control circuit module, and the output terminal of the control circuit module is connected to the input terminal of the motor drive module.

[0006] The sensing module is used to detect the degree of sinking of the door body where the motor is located relative to the door frame, determine the initial voltage based on the degree of sinking, construct a voltage adjustment signal using the initial voltage, and send the voltage adjustment signal to the control circuit module.

[0007] The control circuit module is used to respond to the voltage adjustment signal and adjust the initial voltage corresponding to the voltage adjustment signal until the target voltage that meets the preset conditions is output, and send the target voltage to the motor drive module.

[0008] The motor drive module is used to receive the target voltage and use the target voltage as the reference voltage for driving the actuator of the device.

[0009] Furthermore, the sensing module includes one or more of an infrared sensor, a tilt sensor, an angular velocity sensor, and a Hall sensor.

[0010] Furthermore, when the sensing module is an infrared sensor, it is fixed between the connecting parts of the actuating components and includes: a transmitting tube and at least two receiving tubes, wherein the receiving tubes are arranged at intervals around the transmitting tube, and the receiving tubes are used to collect light beams from the transmitting tube from different angles.

[0011] Furthermore, the center-to-center distance between the transmitting tube and each of the receiving tubes is D1, where 1mm≤D1≤5mm.

[0012] Furthermore, in the second detection axis, the second receiving tube includes a first receiving tube and a second receiving tube, wherein the optical axis of the first receiving tube and the optical axis of the transmitting tube form a first detection axis horizontal to the ground, and the optical axis of the second receiving tube and the optical axis of the transmitting tube form a second detection axis perpendicular to the ground.

[0013] Furthermore, a light-blocking component is provided between the transmitting tube and the receiving tube. The surface of the light-blocking component is provided with a first light-transmitting hole corresponding to the transmitting tube and a second light-transmitting hole corresponding to the receiving tube. The inner walls of the first light-transmitting hole and the second light-transmitting hole are covered with a light-absorbing coating. The light-blocking component is used to isolate optical crosstalk in the sensing module.

[0014] The control circuit module further includes a feedback unit for monitoring the execution status of the execution component and outputting a target voltage that meets a preset condition based on the execution status, so that the motor drive module uses the target voltage as a reference voltage for motor drive, wherein the preset condition is that the motor associated with the device can just drive the execution component to a specified position under the drive of the target voltage.

[0015] Secondly, this utility model embodiment also provides an intelligent lock equipped with a motor adjustment device, including: a lock body, a motor, a latch mechanism, and the motor adjustment device described in the first aspect, wherein the motor, the latch mechanism, and the motor adjustment device are all disposed inside the lock body, the output end of the motor adjustment device is connected to the input end of the motor, and the output end of the motor is connected to the latch mechanism;

[0016] The motor adjustment device is used to output a drive signal to the motor according to a reference voltage;

[0017] The motor is used to respond to the drive signal and control the locking tongue mechanism to perform locking and unlocking operations based on the drive signal.

[0018] Furthermore, the motor adjustment device includes: a sensing module, a control circuit module, and a motor drive module, wherein the output terminal of the sensing module is connected to the input terminal of the control circuit module, the output terminal of the control circuit module is connected to the input terminal of the motor drive module, and the motor drive module is connected to the motor in the smart lock.

[0019] The sensing module is used to detect the degree of sinking of the door body where the motor is located relative to the door frame, and generate a corresponding voltage adjustment signal based on the degree of sinking;

[0020] The control circuit module is used to output a target voltage that meets preset conditions based on the voltage regulation signal;

[0021] The motor drive module is used to use the target voltage as the reference voltage for the motor drive bolt mechanism in the smart lock.

[0022] The motor adjustment device and smart lock provided in this embodiment of the utility model have the following beneficial effects:

[0023] The device provided in this embodiment detects the degree of sinking of the door relative to the door frame by setting a sensing module and generates a voltage adjustment signal. The control circuit module adjusts the initial voltage to a target voltage that meets the preset conditions based on the signal. Then, the motor drive module uses the target voltage as the reference voltage for driving the actuator. This realizes dynamic adaptation of the drive reference voltage according to the sinking of the door, improves the adaptability and accuracy of the motor drive, and ensures stable operation of the actuator.

[0024] The smart lock provided in this embodiment of the utility model, by configuring the aforementioned motor adjustment device, enables the motor to receive drive signals based on a reference voltage that is dynamically adjusted according to the door's sinking condition. This allows for stable control of the latch mechanism to perform unlocking and locking operations, effectively improving the reliability of the smart lock in scenarios where the door is sinking. It also reduces unlocking and locking failures caused by changes in the door's state, achieving dynamic adaptation between door sinking detection and motor voltage. This ensures that while the sinking door is unlocking and locking, normal door operation is also characterized by low power consumption and quiet operation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0026] Figure 1 A schematic diagram of the structure of a motor adjustment device provided in an embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the infrared sensing module provided in an embodiment of the present utility model;

[0028] Figure 3 A schematic diagram illustrating the working principle of the infrared sensing module provided in this embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the structure of the smart lock with a motor adjustment device provided in an embodiment of this utility model;

[0030] Figure 5 A schematic diagram of the physical structure of the smart lock provided in an embodiment of this utility model;

[0031] Figure 6 A schematic diagram of the layered control architecture of the motor adjustment device inside the lock body provided in this embodiment of the utility model;

[0032] Figure 7 A schematic diagram of the closed-loop voltage regulation mechanism of the control circuit module provided in this embodiment of the utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Figure 1 This is a schematic diagram of the structure of a motor adjustment device according to an embodiment of the present invention. The motor adjustment device 100 includes: a sensing module 101, a control circuit module 102, and a motor drive module 103, wherein the output terminal of the sensing module 101 is connected to the input terminal of the control circuit module 102, and the output terminal of the control circuit module 102 is connected to the input terminal of the motor drive module 103;

[0035] The sensing module 101 is used to detect the degree of sinking of the door body where the motor is located relative to the door frame, determine the initial voltage based on the degree of sinking, construct a voltage regulation signal using the initial voltage, and send the voltage regulation signal to the control circuit module 102.

[0036] The control circuit module 102 is used to respond to the voltage regulation signal and adjust the initial voltage corresponding to the voltage regulation signal until the target voltage that meets the preset conditions is output, and then send the target voltage to the motor drive module 103.

[0037] The motor drive module 103 is used to receive the target voltage and use the target voltage as the reference voltage for driving the actuator of the device.

[0038] Specifically, the sensing module 101 emits infrared light through a transmitting tube. A horizontal receiving tube acquires the reflected signal a1 (to calculate the horizontal distance between the door and the door frame), and a vertical receiving tube acquires the reflected signal a2 (to calculate the tilt angle, i.e., the degree of sag, based on a1). The processing unit converts the degree of sag into an initial voltage, constructs a voltage regulation signal, and sends it to the control circuit module 102. Upon receiving the signal, the control circuit module 102 outputs a waveform with the corresponding duty cycle through a PWM module. This waveform is then converted into an analog voltage by a filtering circuit. The control voltage regulation system (such as a buck-boost topology) dynamically adjusts the initial voltage until a target voltage is output that allows the actuator (such as the latch) to reach the designated position. This target voltage is then sent to the motor drive module 103. The motor drive module 103 uses this target voltage as a reference to drive the motor, outputting torque adapted to the door's state to achieve normal door opening and closing while ensuring low power consumption and quiet operation for a normal door, and stable operation for a sag door.

[0039] As an optional solution of this utility model, the sensing module 101 includes one or more of an infrared sensor, a tilt sensor, an angular velocity sensor, and a Hall sensor.

[0040] Specifically, the sensing module 101 acquires data related to the degree of door sag relative to the door frame through its included sensors: if an infrared sensor is used, the emitting tube emits infrared light, the horizontal receiving tube acquires the reflected signal a1 (to calculate the horizontal distance between the door and the door frame), and the vertical receiving tube acquires the reflected signal a2 (to calculate the tilt angle in combination with a1); if an inclination sensor is included, the tilt angle of the door where the device is located can be directly output; the angular velocity sensor judges the load change (indirectly reflecting the degree of sag) by monitoring abnormal changes in the opening and closing angular velocity of the door; the Hall sensor provides feedback on the door's engagement status through the smoothness of the latch extension and retraction. The processing unit integrates and processes these sensor signals, quantifies the degree of sag, converts it into an initial voltage, constructs a voltage regulation signal, and finally sends this signal to the control circuit module to provide the initial basis for subsequent voltage regulation.

[0041] As an example, the sensing module 101 can combine multiple sensors according to detection requirements: First, it can use only an infrared sensor, including a transmitter (850nm band), a first receiver (horizontal detection axis, 3mm distance from the transmitter), and a second receiver (vertical detection axis, 2mm distance from the transmitter). The distance and tilt angle between the door and the door frame are calculated using reflected signals a1 and a2, suitable for most door status detection scenarios. Second, it can combine an infrared sensor with a Hall sensor. The infrared sensor detects door tilt, while the Hall sensor, installed at the latch, determines whether the latch is stuck by sensing changes in the magnetic field during latch extension and retraction (indirectly reflecting changes in resistance caused by door sinking). The data from both sensors are fused to generate... More precise voltage regulation signal; third, integration of tilt sensor and angular velocity sensor. The tilt sensor directly outputs the tilt angle of the door (accuracy ±0.1°), and the angular velocity sensor monitors the rotational angular velocity of the door when it is opening and closing (when the friction of the sinking door increases, the angular velocity will be lower than that of a normal door). The combination of the two verifies the door status and avoids the error of a single sensor; fourth, the four are used in combination. The infrared sensor provides basic distance and tilt data, the tilt sensor calibrates the tilt angle, the angular velocity sensor helps to judge the door's movement resistance, and the Hall sensor confirms the lock tongue's execution status. It is suitable for equipment with extremely high detection accuracy requirements. Through multi-dimensional data cross-verification, it ensures that the generated voltage regulation signal can accurately match the actual sinking degree of the door.

[0042] As an optional solution of this utility model, when the sensing module 101 is an infrared sensor, it is fixed between the connecting parts of the execution components and includes: a transmitting tube and at least two receiving tubes, the receiving tubes being arranged at intervals around the transmitting tube, wherein the receiving tubes are used to collect light beams from the transmitting tube from different angles.

[0043] It should be noted that when the sensing module 101 is an infrared sensor, it is fixed between the connecting parts of the actuator and includes a transmitting tube and at least two receiving tubes. The receiving tubes are arranged at intervals around the transmitting tube, and there is a certain angle between the center line of the transmitting tube and each receiving tube, so as to collect the light beam from the transmitting tube from different angles. For example, two receiving tubes can be arranged symmetrically above the transmitting tube vertically and to the right horizontally, or three second receiving tubes can be arranged in an equilateral triangle around the transmitting tube, or four receiving tubes can be distributed in a cross shape around the transmitting tube.

[0044] Specifically, when the infrared sensor is working, the transmitting tube continuously emits infrared light. When the door is closed, the infrared light is reflected by the door frame. Different receiving tubes receive the reflected signals from their respective angles (e.g., a1, a2, a3, etc.). The processing unit, combining calibrated distance and reflection parameters, calculates the horizontal distance between the door and the door frame using the reflected signals from some receiving tubes. Simultaneously, based on the differences between the reflected signals from other receiving tubes and the aforementioned signals (due to the different relative angles between each receiving tube and the transmitting tube, the received reflection amounts differ), and after horizontal distance calibration, the tilt angle of the motor adjustment device is obtained. The processing unit converts the tilt degree into an initial voltage, constructs a voltage adjustment signal, and sends it to the control circuit module via a connecting cable, providing the door's status as the basis for subsequent motor voltage adjustment.

[0045] As an optional solution of this utility model, the center distance between the transmitting tube and each receiving tube is D1, wherein 1mm≤D1≤5mm.

[0046] Specifically, from a hardware structure perspective, the transmitting tube and each receiving tube are integrated between the connection points of the execution components and isolated by a light-blocking device to prevent crosstalk. This spacing range ensures effective reception of infrared reflected signals: too small a spacing can easily lead to misjudgment due to the physical space being too close, causing the emitted light to directly illuminate the receiving tube; too large a spacing will result in insufficient signal strength due to excessive attenuation of reflected light. A range of 1-5mm can balance signal sensitivity and anti-interference within a limited space, and together with the light-blocking device, further ensures the accuracy of the reflected signal.

[0047] As an optional solution of this utility model, the receiving tube includes: a first receiving tube and a second receiving tube, wherein the optical axis of the first receiving tube and the optical axis of the transmitting tube form a first detection axis horizontal to the ground, and the optical axis of the second receiving tube and the optical axis of the transmitting tube form a second detection axis perpendicular to the ground.

[0048] As an example, a schematic diagram of the infrared sensing module is shown below. Figure 2 As shown, the device is integrated inside the lock body of the smart lock. Its core components and layout are as follows: Transmitter 1: A circular opening, a light-emitting diode emitting infrared light of a specific wavelength, responsible for emitting invisible infrared light outwards; Receiver 2: A square opening, located directly above transmitter 1, a transistor receiving reflected infrared light and generating photocurrent; Receiver 3: A square opening, located to the horizontal right of transmitter 1, also a transistor receiving reflected infrared light; The center line connecting transmitter 1 and receiver 3 is parallel to the ground, forming the first detection axis (used to detect the horizontal distance between the door and the door frame); the center line connecting transmitter 1 and receiver 2 is perpendicular to the ground, forming the second detection axis (used to detect the vertical tilt of the door relative to the door frame), and the angle between the two detection axes is a right angle.

[0049] The working principle of the infrared sensing module, such as Figure 3 As shown, the transmitting tube 1 and the receiving tube 2 are arranged along the height direction of the door body (vertical to the ground), and the receiving tube 2 is directly below the transmitting tube 1 (that is, the azimuth relationship is that the second receiving tube is vertically downward relative to the transmitting tube in the second detection axis). Combining the relationship between the reflected signal intensity and the tilt angle, the determination logic of the door body sinking state is as follows:

[0050] If the door body is parallel and fitted with the door frame, after the infrared light emitted by the transmitting tube 1 is reflected by the door frame, the intensity a2 of the second reflected signal received by the receiving tube 2 is equal to the calibrated intensity a1 of the first reflected signal (because there is no tilt of the door body and the reflected light is evenly distributed). At this time, after calibration with the distance L1 (the distance between the transmitting tube 1 and the receiving tube 2), the calculated tilt angle is equal to the preset value (such as the angle when the door body and the door frame have no tilt is 0), and it is determined that the door body where the intelligent lock is located is in a normal state.

[0051] If the upper part of the door body is deformed / affected by external force and moves away from the door frame (for example, the door body tilts outward around the lower hinge), the reflection area of the emitted light on the door frame will shift towards the upper part of the door body. Since the receiving tube 2 is located below the transmitting tube 1, more reflected light will be captured by the lower receiving tube 2, resulting in a2 > a1. After calibration with the distance L2 (to offset the influence of the vertical distance on the amount of reflected light), the calculated tilt angle is greater than the preset value, and at this time it is determined that the door body is in the first abnormal state where the upper part moves away from the door frame.

[0052] If the lower part of the door body is deformed / affected by external force and moves away from the door frame (for example, the door body tilts outward around the upper hinge), the path of the reflected light reaching the receiving tube 2 will be blocked or the reflection angle will be changed due to the tilt of the lower part of the door body, resulting in a < a1. After calibration with the distance L1, the calculated tilt angle is less than the preset value, and at this time it is determined that the door body is in the second abnormal state where the lower part moves away from the door frame.

[0053] As an optional solution of the present invention, a light-blocking component is provided between the transmitting tube and the receiving tube. Among them, the surface of the light-blocking component is provided with a first light-transmitting hole corresponding to the transmitting tube and a second light-transmitting hole corresponding to the receiving tube. The inner walls of the first light-transmitting hole and the second light-transmitting hole are covered with an absorbing coating, and the light-blocking component is used to isolate the optical path crosstalk in the sensing module 101.

[0054] Specifically, the light-blocking component can be integrally molded from black light-shielding plastic (such as ABS material). Its first light-transmitting hole is a 1.8mm diameter circular hole corresponding to the emitting tube, fitting the circular opening structure of the emitting tube. The second light-transmitting hole is a 1.5mm × 1.5mm square hole, matching the square openings of each receiving tube. The inner walls of the light-transmitting holes are coated with a 0.1mm thick matte black light-absorbing coating (such as carbon black paint) to absorb scattered light. For example, when the distance between the emitting tube and each receiving tube is 3mm, the thickness of the light-blocking component is set to 2mm. This solid part blocks the direct light path between them, allowing only the infrared light from the emitting tube to exit through the first light-transmitting hole, and the reflected light from the door frame to enter through the corresponding second light-transmitting holes of each receiving tube.

[0055] In addition, the light-blocking component is made of light-shielding rubber material, and the inner wall of the light-transmitting hole is flocked (the light-absorbing coating is a fluffy layer). The elasticity of the rubber is used to tightly fit the edge of the tube, further reducing light leakage through gaps. It is especially suitable for scenarios where the receiving tube is arranged in two surrounding the transmitting tube. In this case, the two second light-transmitting holes are symmetrically distributed according to the distance between the receiving tubes, and the light-absorbing coatings on their inner walls work independently to ensure that the detection light paths in the vertical direction do not interfere with each other, effectively avoiding signal deviation caused by crosstalk.

[0056] As an optional solution of this utility model, the control circuit module 102 further includes: a feedback unit, used to monitor the execution status of the execution component, and output a target voltage that meets preset conditions according to the execution status, so that the motor drive module 103 uses the target voltage as the reference voltage for motor drive, wherein the preset condition is that the motor associated with the device can just make the execution component reach the specified position under the drive of the target voltage.

[0057] Specifically, the feedback unit can adopt a structure combining a microswitch and a signal processing chip. The microswitch is installed at the extreme positions of the fully extended and retracted bolt, and its signal output is connected to the comparator circuit of the feedback unit. For example, when the motor drives the bolt to extend with an initial voltage of 6V, if the feedback unit detects that the microswitch has not been triggered (the actuator is not in position), it will control the PWM module through internal logic to reduce the duty cycle from 9.1% to 7.0% (corresponding to an increase in voltage from 6.03V to 6.97V), driving the motor to run again until the microswitch is triggered (the bolt is in position). At this time, 6.97V is the target voltage that meets the preset conditions.

[0058] In addition, the feedback unit integrates a Hall sensor to detect the motor speed. When the motor is driven with an initial voltage of 8V, the Hall sensor indicates that the speed has not dropped to the target threshold (indicating that the latch is not in position). The feedback unit then uses a DAC module to reduce the analog voltage from 0.15V to 0.08V (corresponding to an increase from 8.03V to 8.97V) until the speed reaches the target and the latch is in position. If the latch is in position at the initial voltage, the feedback unit gradually reduces the voltage (e.g., from 8.03V to 6.03V). After each reduction, the latch position is detected by an infrared pair, and the lowest voltage (e.g., 6.97V) that allows the latch to be in position is finally determined as the target voltage. This ensures that when the motor drive module uses this voltage as a reference, it can complete the door opening and closing action while avoiding power redundancy.

[0059] Figure 4 This is a schematic diagram of the structure of a smart lock equipped with a motor adjustment device according to an embodiment of the present invention. The smart lock includes: a lock body 200, a motor 300, a latch mechanism 400, and a motor adjustment device 100. The motor 300, the latch mechanism 400, and the motor adjustment device 100 are all disposed inside the lock body 200. The output end of the motor adjustment device 100 is connected to the input end of the motor, and the output end of the motor 300 is connected to the latch mechanism 400.

[0060] The motor regulating device 100 is used to output a drive signal to the motor according to the reference voltage.

[0061] An electric motor is used to respond to a drive signal and control the latch mechanism 400 to perform locking and unlocking operations based on the drive signal.

[0062] As an example, a schematic diagram of the physical structure of a smart lock is shown below. Figure 5 As shown, the smart lock includes a front view and a side view of the lock body (the main structure on the left). The lock body includes a latch 1, an infrared sensor 2 in the motor adjustment device, a main bolt 3, and a deadbolt 4. The infrared sensor 2 is located between the latch and the main bolt, integrating a transmitter and receiver (including a first receiver and a second receiver), and is installed inside the lock body (replacing the position of the traditional mechanical latch). The transmitter emits infrared light of a specific wavelength. The optical axis of the first receiver and the optical axis of the transmitter form a first detection axis horizontal to the ground (used to detect the horizontal distance between the door and the door frame). The optical axis of the second receiver and the optical axis of the transmitter form a second detection axis perpendicular to the ground (used to detect the vertical tilt of the door relative to the door frame).

[0063] Specifically, the lock body 200 is made of die-cast aluminum alloy and has independent chambers inside to house the motor 300 (a 6V DC geared motor with a planetary gear reducer), the latch mechanism 400 (including the slant latch, main latch, and anti-lock latch, with microswitches at the slant latch and main latch), and the motor adjustment device 100. The sensing module (infrared phototransistor sensor) of the motor adjustment device 100 is embedded in the reserved slot between the slant latch and the main latch of the latch mechanism 400, and the transmitting and receiving tubes are isolated by a light-blocking component. The control circuit module (including an STM32 series MCU and PWM module) and the motor drive module (using a dual MOS transistor drive circuit) are integrated on a circuit board inside the lock body. The circuit board is connected to the terminals of the motor 300 via a ribbon cable, and the output shaft of the motor 300 is connected to the drive shaft of the latch mechanism 400 via a coupling. When the user triggers the unlock command, the sensor module's transmitter emits 960nm infrared light. After being reflected by the door frame, the first receiver (horizontal axis) obtains a1 and calculates the distance to the door frame as 5mm. The second receiver (vertical axis) obtains a2 and determines that the door is not tilted. Based on this, the control circuit module determines a reference voltage of 4.97V. The motor drive module outputs this voltage to the motor 300. The motor rotates forward, driving the transmission shaft through the gearbox, causing the main latch and the oblique latch of the latch mechanism 400 to retract until the micro switch at the oblique latch is triggered, the motor stops running, and the unlocking is completed.

[0064] In addition, the lock body 200 is made of stainless steel, the motor 300 is a 12V DC motor, and the main lock tongue of the lock tongue mechanism 400 is equipped with a Hall position sensor. When the door body sinks and causes a tilt angle of 3°, after the sensing module detects it, the control circuit module adjusts the reference voltage to 8.03V, the motor drive module outputs this voltage, and the motor reverses to drive the lock tongue to extend, overcoming the friction of the door body, until the Hall sensor of the main lock tongue detects the position signal, ensuring reliable locking.

[0065] As an optional solution of this utility model, the motor adjustment device 100 includes: a sensing module 101, a control circuit module 102 and a motor drive module 103, wherein the output terminal of the sensing module 101 is connected to the input terminal of the control circuit module 102, the output terminal of the control circuit module 102 is connected to the input terminal of the motor drive module 103, and the motor drive module 103 is connected to the motor in the smart lock.

[0066] The sensing module 101 is used to detect the degree of sinking of the door body where the motor is located relative to the door frame, and generate a corresponding voltage adjustment signal based on the degree of sinking;

[0067] Control circuit module 102 is used to output a target voltage that meets preset conditions based on a voltage regulation signal;

[0068] The motor drive module 103 is used to use the target voltage as the reference voltage for the motor 300 in the smart lock to drive the bolt mechanism 400.

[0069] Specifically, the sensing module 101 of the motor regulating device 100 is an infrared sensing lock body system, which includes a transmitting tube (850nm band), a first receiving tube (horizontal detection axis) and a second receiving tube (vertical detection axis). The three are isolated by a light-blocking component and installed between the oblique tongue and the main locking tongue of the locking tongue mechanism 400. The control circuit module 102 uses an STM32F103 MCU, which integrates a PWM module (100K frequency) and a filtering circuit. The voltage regulation system is a buck-boost topology (R1 = 120KΩ, R2 = 9KΩ). The motor drive module 103 is a TB6612FNG motor drive chip. When the door does not sink (a1=a2), the sensing module detects a tilt angle of 0° and generates a voltage adjustment signal (Vi=0.38V) with a corresponding PWM duty cycle of 11.5%. The control circuit module outputs a target voltage of 4.97V based on this signal. The motor drive module uses this voltage as a reference to drive a 6V DC motor to operate at low torque, and the latch mechanism 400 extends and retracts smoothly, achieving quiet and energy-saving operation.

[0070] In addition, the door body sinks, resulting in a tilt angle of 5°. The sensing module detects that a2 is much larger than a1, and generates a voltage regulation signal with a PWM duty cycle of 0.0% (Vi = 0V). The control circuit module outputs a target voltage of 10.03V. The motor drive module uses this as a reference to drive the motor to output high torque, overcome the friction of the door body, and ensure that the main lock tongue of the lock tongue mechanism 400 is fully extended into place, triggering the micro switch to complete the locking.

[0071] As an example, Figure 6 This is a schematic diagram of the hierarchical control architecture of the motor adjustment device inside the lock body, as shown below. Figure 6 As shown, the motor regulating device integrates a sensing module 101, a main control and control circuit module 102 (independently powered by system power supply 2), and a motor drive module 103 (responsible for power amplification and driving motor 300). The dual power supply design provides redundant power supply for the core module, avoiding system failure due to a single power supply failure.

[0072] The sensing module 101 captures the deformation of the door and outputs a physical signal; after receiving the signal, the main controller and the collaborative control circuit module 102 calculate and generate the target voltage; the motor drive module 103 converts the target voltage into a motor drive signal, controls the motor 300 to run, and drives the latch mechanism 400 to complete the locking and unlocking action; the feedback link between the control circuit and the drive module corrects the control parameters in real time to ensure that the motor power matches the door state.

[0073] Among them, the closed-loop voltage regulation mechanism of the control circuit module, such as Figure 7As shown, system power supply 2 supplies power to the control circuit module, which also receives the initial input voltage. The module outputs the target voltage, which is fed back to the module in the form of voltage feedback through a voltage divider network composed of resistors R1 and R2. The control circuit has a built-in comparator that compares the feedback voltage with the internal reference in real time and dynamically adjusts the output signal. If the door body sinks, causing the bolt resistance to increase, the module will increase the voltage. The feedback closed loop ensures stable output, allowing the motor drive module to obtain a precise drive reference, and ultimately achieving reliable extension and retraction of the bolt under complex working conditions.

[0074] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A motor adjusting device, characterized in that, The device includes: a sensing module, a control circuit module, and a motor drive module, wherein the output terminal of the sensing module is connected to the input terminal of the control circuit module, and the output terminal of the control circuit module is connected to the input terminal of the motor drive module. The sensing module is used to detect the degree of sinking of the door body where the motor is located relative to the door frame, determine the initial voltage based on the degree of sinking, construct a voltage adjustment signal using the initial voltage, and send the voltage adjustment signal to the control circuit module. The control circuit module is used to respond to the voltage adjustment signal and adjust the initial voltage corresponding to the voltage adjustment signal until the target voltage that meets the preset conditions is output, and send the target voltage to the motor drive module. The motor drive module is used to receive the target voltage and use the target voltage as the reference voltage for driving the actuator of the device.

2. The apparatus according to claim 1, characterized in that, The sensing module includes one or more of the following: infrared sensor, tilt sensor, angular velocity sensor, and Hall sensor.

3. The apparatus of claim 1, wherein, When the sensing module is an infrared sensor, it is fixed between the connecting parts of the actuator and includes: a transmitting tube and at least two receiving tubes, wherein the receiving tubes are arranged at intervals around the transmitting tube, and the receiving tubes are used to collect light beams from the transmitting tube from different angles.

4. The apparatus of claim 3, wherein, The center-to-center distance between the transmitting tube and each of the receiving tubes is D1, where 1mm≤D1≤5mm.

5. The apparatus of claim 3, wherein, The receiving tube includes a first receiving tube and a second receiving tube, wherein the optical axis of the first receiving tube and the optical axis of the transmitting tube form a first detection axis horizontal to the ground, and the optical axis of the second receiving tube and the optical axis of the transmitting tube form a second detection axis perpendicular to the ground.

6. The apparatus according to any one of claims 3-5, characterized in that, A light-blocking component is provided between the transmitting tube and the receiving tube. The surface of the light-blocking component is provided with a first light-transmitting hole corresponding to the transmitting tube and a second light-transmitting hole corresponding to the receiving tube. The inner walls of the first light-transmitting hole and the second light-transmitting hole are covered with a light-absorbing coating. The light-blocking component is used to isolate optical crosstalk in the sensing module.

7. The apparatus according to claim 1, characterized in that, The control circuit module further includes a feedback unit for monitoring the execution status of the execution component and outputting a target voltage that meets a preset condition based on the execution status, so that the motor drive module uses the target voltage as a reference voltage for motor drive, wherein the preset condition is that the motor associated with the device can just drive the execution component to a specified position under the drive of the target voltage.

8. An intelligent lock configured to regulate an electric motor, the lock comprising: include: A lock body, a motor, a latch mechanism, and a motor adjustment device according to any one of claims 1-7, wherein the motor, the latch mechanism, and the motor adjustment device are all disposed inside the lock body, the output end of the motor adjustment device is connected to the input end of the motor, and the output end of the motor is connected to the latch mechanism; The motor adjustment device is used to output a drive signal to the motor according to a reference voltage; The motor is used to respond to the drive signal and control the locking tongue mechanism to perform locking and unlocking operations based on the drive signal.

9. The smart lock of claim 8, wherein, The motor adjustment device includes: a sensing module, a control circuit module, and a motor drive module, wherein the output terminal of the sensing module is connected to the input terminal of the control circuit module, the output terminal of the control circuit module is connected to the input terminal of the motor drive module, and the motor drive module is connected to the motor in the smart lock. The sensing module is used to detect the degree of sinking of the door body where the motor is located relative to the door frame, and generate a corresponding voltage adjustment signal based on the degree of sinking; The control circuit module is used to output a target voltage that meets preset conditions based on the voltage regulation signal; The motor drive module is used to use the target voltage as the reference voltage for the motor drive bolt mechanism in the smart lock.

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