A stepless adjustment device and an electric cleaning brush using the same.

Abstract

This utility model discloses a stepless adjustment device and an electric cleaning brush using the same. The stepless adjustment device includes a drive unit, a status indicator unit, and a control motherboard, both of which are connected to the control motherboard. The control motherboard is configured to achieve stepless linkage adjustment between the output intensity of the drive unit and the brightness of the status indicator unit based on the same PWM control signal. During operation, the drive unit adjusts according to the PWM control signal sent by the control motherboard, changing the rotation speed of the electric cleaning brush and affecting the cleaning effect. Simultaneously, the status indicator unit adjusts its brightness according to the same PWM signal change, thus achieving a stepless linkage with the output of the drive unit. In this way, the user can intuitively observe the brightness change of the status indicator unit while adjusting the cleaning brush speed, solving the technical problem of traditional electric cleaning brushes that only provide limited speed settings and whose speed settings cannot match the brightness of the indicator light.

Description

Technical Field

[0001] This utility model belongs to the field of electric cleaning brush technology, specifically relating to a stepless adjustment device and an electric cleaning brush using the same. Background Technology

[0002] With the development of intelligent electric cleaning tools, traditional electric cleaning brushes generally adopt fixed-speed motor adjustment and static display designs, which are difficult to adapt to diverse scenarios in actual cleaning operations. For example, when users face different surface materials or levels of dirt, they need to adjust the speed in real time during the cleaning process to achieve the best cleaning effect. However, existing technology only provides a limited number of speed settings, resulting in insufficient speed adjustment precision and an inability to achieve smooth transitions. At the same time, their display systems mostly use fixed-brightness indicator lights, which cannot dynamically reflect the device's operating status, reducing the intuitiveness of operation. Utility Model Content

[0003] In view of this, the present invention provides a stepless adjustment device and an electric cleaning brush using the same, which solves the technical problem that traditional electric cleaning brushes only provide limited gear switching and the gear level and indicator light brightness cannot be matched.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a stepless adjustment device, the stepless adjustment device comprising a drive unit, a status indicator unit, and a control motherboard, wherein the drive unit and the status indicator unit are both connected to the control motherboard; wherein the control motherboard is configured to: based on the same PWM control signal, enable stepless linkage adjustment between the output intensity of the drive unit and the brightness of the status indicator unit.

[0005] In some embodiments, the stepless adjustment device further includes a housing and a motherboard bracket disposed within the housing, wherein the control motherboard is mounted on the motherboard bracket.

[0006] In some embodiments, the back of the housing is provided with a rear cover, and a light guide hole is provided on the rear cover, through which the light of the status indicator unit can be transmitted outward.

[0007] In some embodiments, the size of the light guide hole gradually changes along the arrangement direction to match the brightness changes of the status indication unit.

[0008] In some embodiments, the status indication unit includes multiple groups of LED beads arranged in an arch, the brightness of the LED beads being matched with the output intensity of the driving unit, and the light from the LED beads being transmitted outward through the light guide hole.

[0009] In some embodiments, the control motherboard includes a microcontroller, a motor drive module, and an LED control module, both of which are connected to the microcontroller. The microcontroller generates a PWM control signal, the motor drive module receives the PWM control signal and adjusts the voltage duty cycle of the drive unit, and the LED control module receives the same PWM control signal and adjusts the brightness of the status indicator unit.

[0010] In some embodiments, the stepless adjustment device further includes a capacitive spring switch. The capacitance change signal of the capacitive spring switch is amplified and converted into a digital signal, which is transmitted to the control motherboard to trigger start / stop and adjustment commands for the stepless adjustment device.

[0011] In some embodiments, the capacitive spring switch includes a first adjusting switch and a second adjusting switch, wherein the first adjusting switch is used to increase the output intensity and brightness, and the second adjusting switch is used to decrease the output intensity and brightness;

[0012] The surface of the back cover is provided with an increase adjustment marking area and a decrease adjustment marking area, which respectively cover the first adjustment switch and the second adjustment switch.

[0013] In some embodiments, the drive unit includes a DC geared motor with an unload speed of 270-330 rpm and a full load speed of 90-110 rpm, and integrates an overload protection circuit.

[0014] In some embodiments, the motherboard bracket is snapped into the housing by a foolproof structure; and / or a guide groove is provided at the joint between the housing and the back cover, the guide groove being filled with 70%-80% of its volume of waterproof adhesive.

[0015] In some embodiments, the continuously variable adjustment device further includes a display screen for real-time display of power, output intensity level and operating status. The display screen is disposed on the control motherboard and displays information outward through a display window disposed on the rear cover.

[0016] According to another aspect of this application, an embodiment of the present invention provides an electric cleaning brush, the electric cleaning brush including the stepless adjustment device described above.

[0017] Compared with the prior art, the stepless adjustment device of this utility model has at least the following beneficial effects:

[0018] The stepless adjustment device provided by this utility model includes a drive unit, a status indicator unit, and a control motherboard. The drive unit and the status indicator unit are both connected to the control motherboard. The control motherboard is configured to enable stepless linkage adjustment between the output intensity of the drive unit and the brightness of the status indicator unit based on the same PWM control signal.

[0019] When working in tandem, the drive unit adjusts according to the PWM control signal sent by the control motherboard, changing the rotation speed of the electric cleaning brush and thus affecting the cleaning effect. Simultaneously, the status indicator unit adjusts its brightness according to the same PWM signal changes, achieving a stepless linkage with the drive unit's output. This allows users to intuitively observe the brightness changes of the status indicator unit while adjusting the cleaning brush speed, enhancing intuitiveness and convenience. This interactive design effectively addresses the shortcomings of fixed-speed adjustment and static display designs mentioned in the background technology, enabling smooth speed adjustment and dynamic feedback on the device's operating status, improving operational flexibility and user experience.

[0020] The electric cleaning brush provided by this utility model is designed based on the above-mentioned stepless adjustment device. Its beneficial effects are the same as those of the above-mentioned stepless adjustment device, and will not be repeated here.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded view of a stepless adjustment device provided in an embodiment of this utility model;

[0024] Figure 2 This is a partial exploded view of a stepless adjustment device provided in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of a stepless adjustment device provided in an embodiment of this utility model;

[0026] Figure 4 This is a front view of a stepless adjustment device provided in an embodiment of this utility model;

[0027] Figure 5 This is a side view of a stepless adjustment device provided in an embodiment of this utility model;

[0028] Figure 6 This is a front view of the rear cover of a stepless adjustment device provided in an embodiment of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the housing and the main board bracket in a stepless adjustment device provided by an embodiment of this utility model;

[0030] Figure 8 This is a schematic diagram of a stepless adjustment device provided in an embodiment of this utility model.

[0031] in:

[0032] 1. Drive unit; 2. Status indicator unit; 3. Control motherboard; 31. Microcontroller; 32. Motor drive module; 33. LED control module; 4. Housing; 41. Foolproof structure; 5. Motherboard bracket; 6. Back cover; 61. Light guide hole; 62. Display window; 7. Capacitive spring switch; 71. First adjustment switch; 72. Second adjustment switch; 81. Increase adjustment indicator area; 82. Decrease adjustment indicator area; 9. Display screen. Detailed Implementation

[0033] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0034] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Example 1

[0037] This embodiment provides a stepless adjustment device, such as Figures 1-8 As shown, the stepless adjustment device includes a drive unit 1, a status indicator unit 2, and a control motherboard 3. Both the drive unit 1 and the status indicator unit 2 are connected to the control motherboard 3. The control motherboard 3 is configured to enable stepless linkage adjustment between the output intensity of the drive unit 1 and the brightness of the status indicator unit 2 based on the same PWM control signal.

[0038] The drive unit 1, status indicator unit 2, and control motherboard 3 are electrically connected. Drive unit 1 and control motherboard 3 are connected via power and signal lines, allowing control motherboard 3 to send control signals to drive unit 1 to adjust the motor's output intensity. Simultaneously, status indicator unit 2 is also electrically connected to control motherboard 3, allowing control motherboard 3 to receive feedback signals from status indicator unit 2. This connection method enables them to work in coordination. Control motherboard 3 is typically located inside the electric cleaning brush, drive unit 1 may have the motor embedded in the bottom of the device, and status indicator unit 2 may be located in a visible area for easy user observation.

[0039] In this embodiment, the drive unit 1 is responsible for physical driving and adjusting the rotation speed of the electric cleaning brush to adapt to different cleaning scenarios and needs. The main function of the status indicator unit 2 is to provide visual feedback on the operating status, such as changes in the brightness of the indicator lights, allowing users to understand the current working status of the device. The control motherboard 3 is responsible for overall management and control. Its built-in microcontroller generates a PWM control signal, which adjusts the output intensity of the drive unit 1 and simultaneously controls the brightness of the status indicator unit 2. The design of the control motherboard 3 ensures the intelligence and efficiency of the device, allowing users to obtain a more flexible and adaptable operating experience.

[0040] When working together, the drive unit 1 adjusts according to the PWM control signal sent by the control motherboard 3, changing the rotation speed of the electric cleaning brush and thus affecting the cleaning effect. Simultaneously, the status indicator unit 2 adjusts its brightness according to the same PWM signal changes, achieving a stepless linkage with the output of the drive unit 1. In this way, the user can intuitively observe the brightness change of the status indicator unit 2 while adjusting the cleaning brush speed, enhancing the intuitiveness and convenience of use. This interactive design effectively solves the shortcomings of fixed-gear adjustment and static display design mentioned in the background art, enabling smooth speed adjustment and dynamic feedback on the device's operating status, improving operational flexibility and user experience.

[0041] In a specific embodiment, such as Figure 1 and Figure 2 As shown, the stepless adjustment device also includes a housing 4 and a main board bracket 5 disposed in the housing 4, and the control main board 3 is mounted on the main board bracket 5.

[0042] The control motherboard 3 is fixed to the motherboard bracket 5 by screws or clips, and the motherboard bracket 5 is installed inside the housing 4, thus protecting the control motherboard 3 within the housing 4. The housing 4, as an external protective structure, protects the internal electronic components and circuits, while also providing a safe operating surface for the user. This design ensures the stability of the control motherboard 3 during use and prevents damage caused by external impacts.

[0043] Specifically, the main function of housing 4 is to provide structural support and protection, preventing dust, dirt, and moisture from entering the device's interior, thereby improving its durability and safety. Simultaneously, housing 4 provides necessary space for other components to ensure the overall performance of the electric cleaning brush. The mainboard bracket 5 supports and positions the control mainboard 3, ensuring its accurate installation and preventing displacement or poor contact during use. Through the mainboard bracket 5, the various signal and power connections of the control mainboard 3 remain stable, improving overall electrical performance.

[0044] The combination of the housing 4 and the motherboard bracket 5 makes the stepless adjustment device more stable. The design of the motherboard bracket 5 ensures the precise positioning of the control motherboard 3, thereby reducing the risk of failure due to component loosening in complex environments. At the same time, the housing 4 effectively protects the motherboard bracket 5 and its internal components, ensuring the airtightness and waterproof performance of the device, thus enabling the device to operate more reliably in various cleaning scenarios. Through this structural configuration, users can experience higher safety and stability, thereby improving the overall user experience of the device.

[0045] In a specific embodiment, such as Figure 1 and Figure 2 As shown, the back of the housing 4 is provided with a back cover 6, and a light guide hole 61 is provided on the back cover 6, through which the light of the status indicator unit 2 can be transmitted outward.

[0046] The back of the housing 4 is equipped with a rear cover 6, on which a light guide hole 61 is provided to allow the light from the status indicator unit 2 to be transmitted smoothly outward. This design ensures that the light signal emitted by the status indicator unit 2 can be clearly observed by the user through the light guide hole 61 when the electric cleaning brush is running, improving the visibility and intuitiveness of the device. The light guide hole 61 allows light of different brightness to pass through it, providing dynamic feedback. Users can easily judge the current working status of the device, such as whether the electric cleaning brush is running and the set speed level, thus achieving effective monitoring of the device status.

[0047] Through this design, users can intuitively perceive the device's operating status by observing the brightness changes of the light guide hole 61 during actual use, and thus make fine adjustments to the use of the cleaning brush. This visual feedback mechanism not only improves the user experience of the device, but also makes operation safer and more convenient, because users can promptly detect the device's working status and avoid poor results or safety hazards caused by improper operation. Overall, the presence of the light guide hole 61 optimizes the interaction between the device and the user, and improves the level of intelligence and user-friendliness in the electric cleaning brush design.

[0048] In a specific embodiment, such as Figure 3 and Figure 4 As shown, the size of the light guide hole 61 gradually changes along the arrangement direction to match the brightness change of the status indicator unit 2.

[0049] The gradually changing size of the light guide aperture 61 along its arrangement means that the size of the light guide aperture gradually changes with its position, thus creating a visually adaptive brightness effect. This design allows the change in the light guide aperture 61 to effectively adjust the propagation range and intensity of the light when the status indicator unit 2 emits light of different brightness, ensuring a more harmonious and natural transition effect when the light is output. For example, a larger light guide aperture may allow more light to pass through, while a smaller light guide aperture will restrict the diffusion of light, thus making the indicator lights of different brightness states have higher visibility and consistency when passing through the light guide aperture 61.

[0050] This gradual design in this embodiment coordinates with the brightness changes of the status indicator unit 2, providing users with a smoother and more intuitive visual experience, which helps them perceive the current operating status of the cleaning brush. By effectively matching the different brightness levels emitted by the status indicator unit 2, the design of the light guide hole 61 enhances the user experience and reduces eye strain or discomfort caused by sudden changes in light. This transitional and adaptive effect not only enhances the functionality of the product but also improves its overall aesthetics, making the electric cleaning brush more intuitively suited to the user's needs during use.

[0051] In a specific embodiment, such as Figure 3 and Figure 4 As shown, the status indicator unit 2 includes multiple sets of LED beads arranged in an arch shape. The brightness of the LED beads matches the output intensity of the driving unit 1, and the light from the LED beads is transmitted outward through the light guide hole 61.

[0052] The status indicator unit 2 consists of multiple sets of arched LED beads, totaling 13 sets, which can efficiently display the current working status of the electric cleaning brush. The brightness of these LED beads matches the output intensity of the drive unit 1, meaning that when the motor speed of the electric cleaning brush changes, the brightness and number of LED beads lit also adjust accordingly. Specifically, the output intensity of the drive unit 1 may vary in different cleaning scenarios, and the LED beads provide clear working status indications to the user by adjusting their brightness and the number of lit beads based on real-time feedback. Furthermore, even when using LED beads of the same specification, visual brightness gradation can be achieved through differences in the size of the light guide hole 61.

[0053] This embodiment enhances intuitiveness and intelligent experience. Users can quickly understand the working status and current cleaning intensity of the electric cleaning brush by observing changes in the brightness of the LED beads. This method of using indicator light brightness to feedback the device status improves user convenience and reduces user confusion about the device's status. The arched arrangement of the LED beads helps to evenly distribute light, making the status indication more visible. Users can clearly see the brightness of the indicator lights even at different angles and distances, further optimizing the product's user-friendly design. This brightness matching and visual feedback helps users achieve optimal cleaning results, thereby improving the overall user experience.

[0054] In a specific embodiment, such as Figure 8As shown, the control motherboard 3 includes a microcontroller 31, a motor drive module 32, and an LED control module 33. Both the motor drive module 32 and the LED control module 33 are connected to the microcontroller 31. The microcontroller 31 generates a PWM control signal, the motor drive module 32 receives the PWM control signal and adjusts the voltage duty cycle of the drive unit 1, and the LED control module 33 receives the same PWM control signal and adjusts the brightness of the status indicator unit 2.

[0055] The microcontroller 31, motor drive module 32, and LED control module 33 are electrically connected and cooperate to achieve intelligent control of the electric cleaning brush. The microcontroller 31, as the central processing unit, is responsible for generating PWM control signals, which are then transmitted to the motor drive module 32 and the LED control module 33. Upon receiving the PWM signals, the motor drive module 32 adjusts the voltage duty cycle of the drive unit 1, thereby controlling the motor's speed and output intensity. Simultaneously, the LED control module 33 also receives this PWM signal and adjusts the brightness of the status indicator unit 2. Through this connection, the modules can cooperate to achieve precise management of the entire cleaning brush's operating status.

[0056] The coordinated operation of the microcontroller 31, motor drive module 32, and LED control module 33 enables the electric cleaning brush to intelligently respond to user needs. When a cleaning mode or speed requirement is specified, the microcontroller 31 generates a corresponding PWM control signal. The motor drive module 32 adjusts the motor output based on this signal to achieve smooth speed changes. Simultaneously, the LED control module 33 adjusts the brightness of the LEDs according to the same PWM signal, allowing the user to intuitively perceive the working status of the electric cleaning brush. This intelligent feedback mechanism not only improves the flexibility of the device and the user experience but also ensures optimal cleaning results and avoids excessive power consumption or low energy efficiency.

[0057] More specifically, the motor drive module 32 typically includes a power amplifier and connected protection circuitry. The power amplifier receives PWM control signals from the microcontroller 31 and converts them into current signals suitable for the drive unit 1. These signals control the motor voltage by adjusting the duty cycle, thereby achieving precise speed regulation. Furthermore, the motor drive module 32 may also be equipped with overcurrent protection, overheat protection, and short-circuit protection to ensure the safety and stability of the motor during operation.

[0058] The LED control module 33 mainly comprises multiple independent drive channels and corresponding control circuits. Each drive channel receives a PWM signal from the microcontroller 31 and adjusts the brightness of the corresponding LED. The module also includes a current limiting circuit to prevent damage to the LEDs due to excessive current. The structural design of the LED control module 33 allows for independent control of multiple LED groups, ensuring clear and accurate status indication for the user, while improving the indicator light's response speed and flexibility. This modular design makes overall system maintenance and upgrades more convenient, contributing to improved product lifespan and reliability.

[0059] In a specific embodiment, the stepless adjustment device further includes a capacitive spring switch 7. The capacitance change signal of the capacitive spring switch 7 is amplified and converted into a digital signal, which is transmitted to the control main board 3 to trigger the start / stop and adjustment commands of the stepless adjustment device.

[0060] The capacitive spring switch 7, a key component of the stepless adjustment device, operates based on capacitance changes. When a user applies pressure or touches the capacitive spring switch 7, the capacitance of its internal capacitor changes. This capacitance change signal is first sent to an amplifier circuit for amplification to improve signal strength and clarity, and then converted into a digital signal for transmission to the control board 3. The digital signal received by the control board 3 can be used to trigger the start / stop and adjustment commands of the stepless adjustment device, thereby controlling the working state and adjustment functions of the electric cleaning brush.

[0061] This embodiment provides a sensitive and intuitive operation method, allowing users to activate or adjust the device through simple touch or pressure, without the need for explicit pressing operations like traditional mechanical switches. The application of this capacitive spring switch effectively improves the user-device interaction experience, reduces the possibility of human error, and enhances overall accuracy and convenience. Furthermore, through digital signal processing, the system can provide more efficient response and status feedback, making the start / stop and adjustment commands of the continuously variable adjustment device faster and more stable, thus enhancing the intelligence and operational efficiency of the electric cleaning brush.

[0062] In a specific embodiment, such as Figure 2 As shown, the capacitive spring switch 7 includes a first adjustment switch 71 and a second adjustment switch 72. The first adjustment switch 71 is used to increase the output intensity and brightness, and the second adjustment switch 72 is used to decrease the output intensity and brightness. The surface of the back cover 6 is provided with an increase adjustment marking area 81 and a decrease adjustment marking area 82, which respectively cover the first adjustment switch 71 and the second adjustment switch 72.

[0063] The capacitive spring switch 7 includes a first adjustment switch 71 and a second adjustment switch 72, used to increase and decrease the output intensity and brightness of the electric cleaning brush, respectively. When the user's finger applies the increase adjustment indicator 81, the pressure is directly transmitted to the first adjustment switch 71, thereby activating the switch to increase the output intensity of the electric cleaning brush and the brightness of the LED beads. Correspondingly, when the user's finger applies the decrease adjustment indicator 82, the pressure is transmitted to the second adjustment switch 72, thereby decreasing the output intensity and brightness of the device. This design enables instant adjustment of the cleaning mode, allowing users to operate flexibly according to different cleaning scenarios, improving the convenience and intuitiveness of use.

[0064] The placement of the "increase" adjustment indicator area 81 and "decrease" adjustment indicator area 82 on the back cover 6 allows users to clearly identify the functions of each indicator during operation. When a finger is placed on the "increase" indicator area 81, the user can directly control the first adjustment switch 71 to enhance the function; while placing it on the "decrease" indicator area 82 controls the second adjustment switch 72 to adjust the intensity of the device. The back cover 6 also features a switch area; placing a finger on this area controls another adjustment switch, thus turning the electric cleaning brush on and off. This design allows users to switch between multiple functions with simple touch controls, effectively improving the overall operability and user experience of the device. By separating the direct labeling and functions, this design also reduces the risk of accidental operation, making operation safer and more efficient.

[0065] In addition to the first adjustment switch 71 and the second adjustment switch 72, the capacitive spring switch 7 also includes an additional adjustment switch specifically for controlling the on / off state of the electric cleaning brush. Corresponding to this adjustment switch, the rear cover 6 has a switch area; the user can activate the adjustment switch by simply placing their finger on this area, thereby turning the device on and off.

[0066] In a specific embodiment, the drive unit 1 is a DC geared motor with an unload speed of 270-330 rpm and a full-load speed of 90-110 rpm, and integrates an overload protection circuit. Furthermore, the overload protection circuit is triggered when the temperature or current of the DC geared motor exceeds a certain value, at which point it automatically cuts off power.

[0067] Drive unit 1 employs a DC geared motor with a no-load speed range of 270-330 rpm and a full-load speed of 90-110 rpm. This design allows the motor to achieve a high speed under no-load conditions, ensuring rapid start-up and response, and adapting to the working requirements of different situations. Simultaneously, the reduced full-load speed helps increase torque, improving the power performance of the electric cleaning brush during the cleaning process, effectively handling various cleaning tasks and achieving better work results. Furthermore, the motor's integrated overload protection circuit monitors the motor's operating status in real time to prevent motor damage due to excessive load, thereby improving the safety and reliability of the equipment and extending its service life.

[0068] Overload protection circuits typically include an overcurrent detector, a control circuit, and a circuit breaker. The overcurrent detector monitors the motor current in real time, and once it detects a current exceeding a preset threshold, it transmits a signal to the control circuit. The control circuit determines the cause based on the received overcurrent signal and triggers the circuit breaker to cut off the power supply and protect the motor from damage. This design allows the overload protection system to respond quickly and effectively under high load conditions, ensuring the normal operation of the electric cleaning brush and reducing the risk of equipment failure.

[0069] In a specific embodiment, such as Figure 7 As shown, the motherboard bracket 5 is snapped into and fixed to the housing 4 via a foolproof structure 41. This design ensures the accurate positioning of the motherboard bracket during installation, preventing waste or equipment malfunction due to improper installation. The foolproof structure 41 may include a protruding snap that engages with a through-hole on the housing, ensuring the motherboard bracket can only be inserted into the housing in a specific manner, thus physically preventing incorrect installation. This structure not only improves the convenience and accuracy of assembly but also significantly enhances the stability of the entire device, reducing potential problems caused by improper installation during use and contributing to improved product reliability.

[0070] The joint between the housing 4 and the rear cover 6 is provided with an adhesive guide groove, which is filled with 70%-80% of its volume of waterproof adhesive.

[0071] A guide groove is provided at the seam between the housing 4 and the rear cover 6, filled with 70%-80% waterproof adhesive to enhance the device's waterproof performance and protect internal electronic components from moisture corrosion. The guide groove effectively guides the waterproof adhesive to fill the seam evenly, ensuring no omissions or gaps, thus forming a well-sealed waterproof barrier. This design achieves an IPX6 waterproof rating, meaning the electric cleaning brush can effectively resist water intrusion without being subjected to water jets. By filling with an appropriate amount of waterproof adhesive, the joint strength and fixation are maintained without affecting the normal closing and disassembly of the housing 4 and rear cover 6. This design significantly improves the safety and durability of the electric cleaning brush in humid environments, ensuring reliable operation of the device in various cleaning scenarios.

[0072] In a specific embodiment, such as Figure 1 and Figure 2 As shown, the continuously variable adjustment device also includes a display screen 9 for real-time display of power consumption, output intensity level, and operating status. The display screen 9 is mounted on the control motherboard 3 and displays information outward through a display window 62 on the rear cover 6. The display screen 9 is an OLED display.

[0073] This embodiment provides intuitive information feedback to the user through the display screen 9, allowing the user to monitor the device's battery status and current operating level in real time while using the electric cleaning brush. This transparent status display not only improves operational convenience but also enables users to adjust the cleaning mode promptly to adapt to different usage needs, effectively preventing insufficient battery power or inappropriate output intensity from affecting the cleaning effect. By directly integrating the display screen 9 with the control motherboard 3 and transmitting information through the display window 62, the integration of the entire system is improved, while also optimizing the device's appearance design, ensuring that the product maintains its aesthetic appeal while fully realizing its functionality.

[0074] Example 2

[0075] This embodiment provides an electric cleaning brush, which includes the stepless adjustment device described in Embodiment 1.

[0076] The electric cleaning brush provided in this embodiment, by applying the stepless adjustment device of Embodiment 1, significantly improves the flexibility and user experience of the electric cleaning brush. The stepless adjustment device, by displaying real-time battery level, output intensity level, and operating status, ensures that users can monitor the device's operation at any time during cleaning, thus making it easier to adjust the cleaning mode. This design not only optimizes the cleaning effect but also enhances the device's adaptability, enabling the electric cleaning brush to efficiently handle different cleaning needs while improving user convenience. Overall, the application of the stepless adjustment device makes the electric cleaning brush more intelligent and user-friendly, further enhancing the product's market competitiveness.

[0077] In addition, the stepless adjustment device in Embodiment 1 can also be applied to other devices, such as electric fans.

[0078] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0079] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A continuously variable adjustment device, characterized by The stepless adjustment device includes a drive unit, a status indicator unit, and a control motherboard, both of which are connected to the control motherboard. The control motherboard is configured to enable stepless linkage adjustment between the output intensity of the drive unit and the brightness of the status indicator unit based on the same PWM control signal.

2. Continuously variable adjustment device according to claim 1, characterized in that The stepless adjustment device also includes a housing and a main board bracket disposed within the housing, wherein the control main board is mounted on the main board bracket.

3. Continuously variable adjusting device according to claim 2, characterized in that The back of the housing is provided with a back cover, and a light guide hole is provided on the back cover, through which the light of the status indicator unit can be transmitted outward.

4. Continuously variable adjusting device according to claim 3, characterized in that The size of the light guide hole gradually changes along the arrangement direction to match the brightness changes of the status indicator unit.

5. A continuously variable adjusting device according to claim 3, characterized in that The status indicator unit includes multiple sets of LED beads arranged in an arch shape. The brightness of the LED beads matches the output intensity of the driving unit, and the light from the LED beads is transmitted outward through the light guide hole.

6. The stepless adjustment device according to claim 1, characterized in that, The control motherboard includes a microcontroller, a motor drive module, and an LED control module. Both the motor drive module and the LED control module are connected to the microcontroller. The microcontroller generates a PWM control signal, the motor drive module receives the PWM control signal and adjusts the voltage duty cycle of the drive unit, and the LED control module receives the same PWM control signal and adjusts the brightness of the status indicator unit.

7. A continuously variable adjusting device according to claim 3, characterized in that The stepless adjustment device also includes a capacitive spring switch. The capacitance change signal of the capacitive spring switch is amplified and converted into a digital signal, which is transmitted to the control motherboard to trigger the start / stop and adjustment commands of the stepless adjustment device.

8. Continuously variable adjusting device according to claim 7, characterized in that The capacitive spring switch includes a first adjusting switch and a second adjusting switch. The first adjusting switch is used to increase the output intensity and brightness, and the second adjusting switch is used to decrease the output intensity and brightness. The surface of the back cover is provided with an increase adjustment marking area and a decrease adjustment marking area, which respectively cover the first adjustment switch and the second adjustment switch.

9. The stepless adjustment device according to claim 1, characterized in that, The drive unit includes a DC geared motor with an unload speed of 270-330 rpm and a full load speed of 90-110 rpm, and integrates an overload protection circuit.

10. The infinitely adjustable device of claim 3, wherein, The motherboard bracket is fixed to the housing by a foolproof structure; and / or the joint between the housing and the back cover is provided with an adhesive guide groove, which is filled with 70%-80% of its volume of waterproof adhesive.

11. A continuously variable adjusting device according to claim 3, characterized in that The continuously variable adjustment device also includes a display screen for real-time display of power, output intensity level and operating status. The display screen is mounted on the control motherboard and displays information outward through a display window mounted on the rear cover.

12. An electrically powered cleaning brush characterized by The electric cleaning brush includes the stepless adjustment device as described in any one of claims 1-11.

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