Magnetic induction knob module, domestic electric appliance and control method

Abstract

The invention relates to a magnetic induction knob module, a life electric appliance and a control method, and belongs to the technical field of life electric appliances. The magnetic induction knob module comprises a substrate, a knob piece and an induction control assembly, and the knob piece is arranged on one side of the substrate and comprises a knob body and a first permanent magnet arranged on the knob body; the induction control assembly comprises a magnetic sensor, a resistance coil and a controller, the magnetic sensor and the resistance coil are in communication connection with the controller, and the magnetic sensor and the resistance coil are both arranged opposite to the first permanent magnet; the magnetic sensor is used for sensing the rotation state of the first permanent magnet. The resistance coil is used for generating a magnetic field hindering rotation of the first permanent magnet. According to the magnetic induction knob module, the domestic electric appliance and the control method provided by the invention, the problem of poor operation hand feeling of a magnetic induction knob in related technologies is at least solved.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a magnetic induction knob module, household appliance, and control method. Background Technology

[0002] A magnetic induction knob module is an electronic component that uses the principle of magnetic induction to achieve non-contact control. It adjusts parameters (such as volume and brightness) by detecting changes in the magnetic field. It has an integrated Hall sensor. When the magnetic knob is rotated, the change in magnetic field strength is converted into an electrical signal, which is then processed and output to the corresponding functional components to generate control commands.

[0003] Compared to mechanical knob modules, magnetic induction knob modules reduce mechanical contact between components, resulting in advantages such as less wear, longer lifespan, and more precise and intelligent control. However, these magnetic induction knob modules typically only use changes in magnetic fields to recognize rotation, and because there is no mechanical connection between the knob and other components, the tactile feedback is poor, making it easy to over-operate. Summary of the Invention

[0004] Therefore, it is necessary to provide a magnetic induction knob module, a household appliance, and a control method to address the problem of poor tactile feedback when using magnetic induction knobs.

[0005] This application provides a magnetic induction knob module, which includes a substrate, a knob component, and a sensing control component. The knob component is disposed on one side of the substrate and includes a knob body and a first permanent magnet disposed on the knob body. The sensing control component includes a magnetic sensor, a resistance coil, and a controller. The magnetic sensor and the resistance coil are respectively communicatively connected to the controller, and both the magnetic sensor and the resistance coil are disposed opposite to the first permanent magnet. The magnetic sensor is used to sense the rotational state of the first permanent magnet, and the resistance coil is used to generate a magnetic field that opposes the rotation of the first permanent magnet.

[0006] In the technical solution of this application embodiment, by setting an induction control component including a magnetic sensor, a resistance coil and a controller, the magnetic sensor and the resistance coil are respectively communicatively connected to the controller, and both the magnetic sensor and the resistance coil are arranged opposite to the first permanent magnet. The magnetic sensor can sense the rotation state of the first permanent magnet, that is, the knob, so that when the knob rotates, the controller can promptly control the resistance coil to work to generate a magnetic field to prevent the knob from rotating, thereby allowing the user to obtain good resistance feedback when rotating the knob and improving the user's operating feel.

[0007] In some embodiments, the sensing control assembly further includes a second permanent magnet disposed on the side of the substrate away from the knob, and the second permanent magnet is attracted to the first permanent magnet. This reduces the mechanical connection between the knob and the substrate, instead utilizing the mutual attraction between the second and first permanent magnets to connect the knob to the substrate, simplifying the manufacturing and installation process and reducing the shortened lifespan of the knob due to aging of the connectors.

[0008] In some embodiments, a blind hole is provided on the surface of the knob body facing away from the substrate, and a first permanent magnet is confined within the blind hole. The first permanent magnet can move within the blind hole from one side of the substrate to the other. This design allows the first permanent magnet to change the distance between itself and the magnetic sensor, improving the interaction between the knob and the magnetic sensor. This, in turn, enables users to perform more complex operations by manipulating the knob, further enhancing the user experience.

[0009] In some embodiments, the knob further includes an elastic element disposed within a blind hole, and the elastic element connects the first permanent magnet to the bottom wall of the blind hole. Using the elastic element as a spring-loaded component for the first permanent magnet within the blind hole improves the spring-loaded reset capability of the first permanent magnet, further enhancing the user's operating experience.

[0010] In some embodiments, the sensing control component further includes a display control module, which is disposed on the substrate and communicatively connected to the controller. The display control module further enriches the user's operating experience, enabling the user to achieve more control possibilities through interaction with the display control module.

[0011] In some embodiments, wired communication connections are used between the display control module and the controller, between the magnetic sensor and the controller, and between the resistance coil and the controller. This design improves the signal transmission stability between the display control module, the magnetic sensor, and the resistance coil and the controller, reduces mutual interference between wireless waves, and thus further enhances the user's operating experience.

[0012] In some embodiments, the magnetic sensor, resistance coil, and controller are all located on the side of the substrate away from the knob. This design facilitates the storage of the magnetic sensor, resistance coil, and controller, and allows the side of the substrate with the knob to be the user interaction side, while the side away from the knob is the functional side, which is beneficial for the design, production, and installation of the magnetic induction knob module. Furthermore, in embodiments where the magnetic sensor or resistance coil and controller are connected wirelessly, this design also allows for proactive design to avoid interference from wireless waves, thus improving the reliability of the magnetic induction knob module.

[0013] This application also provides a household appliance that includes a magnetic induction knob module as provided in any of the foregoing embodiments. This household appliance can be, but is not limited to, a gas stove, oven, or water heater. The connection between the knob and the main body of each household appliance can be optimized, further improving the reliability of the magnetic induction knob module.

[0014] This application also provides a knob control method for controlling a magnetic induction knob module as provided in any of the foregoing embodiments. The knob control method includes the following steps: Step S1, a magnetic sensor senses the magnetic field change signal of a first permanent magnet in real time and transmits the magnetic field change signal to a controller; Step S2, the controller determines the rotation direction of the first permanent magnet based on the magnetic field change signal and sends a working command to the resistance coil; Step S3, the resistance coil is energized and generates a magnetic field that interacts with the first permanent magnet to generate a first resistance in the rotation direction of the first permanent magnet. By setting the induction control component including a magnetic sensor, a resistance coil, and a controller, with the magnetic sensor and resistance coil respectively communicatively connected to the controller, and both the magnetic sensor and resistance coil being positioned opposite the first permanent magnet, the magnetic sensor can sense the rotation state of the first permanent magnet, i.e., the knob. When the knob rotates, the controller can promptly control the resistance coil to work, generating a magnetic field to prevent the knob from rotating, thereby providing the user with good resistance feedback when rotating the knob and improving the user's operating feel.

[0015] In some embodiments, when the magnetic sensor does not detect a change in the magnetic field of the first permanent magnet, the controller sends a standby command to the resistance coil. The resistance coil remains energized and generates a magnetic field that interacts with the first permanent magnet, producing a second resistance in a preset rotation direction of the first permanent magnet. The second resistance is less than the first resistance and less than the friction between the knob and the substrate. This design provides an initial resistance value (second resistance) while the user rotates the knob, mitigating the impact of the hysteresis of the magnetic field generated by the resistance coil on the user experience, thereby further improving the user experience.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 An exploded perspective view of a magnetic induction knob module provided in an embodiment of this application;

[0019] Figure 2 for Figure 1 A cross-sectional view of the knob component along line AA in the magnetic induction knob module shown;

[0020] Figure 3 This is a flowchart of a knob control method provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached drawings: 100, magnetic induction knob module; 10, substrate; 20, knob component; 21, knob body; 211, blind hole; 22, first permanent magnet; 23, elastic element; 30, induction control component; 31, magnetic sensor; 32, resistance coil; 33, controller; 34, second permanent magnet; 35, display control module. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, where the term "and / or" appears, "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0028] A magnetic induction knob module is an electronic component that uses the principle of magnetic induction to achieve non-contact control. It adjusts parameters (such as volume and brightness) by detecting changes in the magnetic field. It has an integrated Hall sensor. When the magnetic knob is rotated, the change in magnetic field strength is converted into an electrical signal, which is then processed and output to the corresponding functional components to generate control commands.

[0029] Traditional mechanical knobs typically make contact with the controller's main circuit board, either through continuous or intermittent contact. Both methods rely on core components such as potentiometers, encoders, or toggle switches. The main drawback of this type of knob is that the carbon film of the potentiometer, the contact plate of the encoder, or the toggle switch are prone to wear due to friction, leading to poor contact or unstable signals, thus reducing their service life and causing unstable operation.

[0030] Compared to mechanical knob modules, magnetic induction knob modules reduce mechanical contact between components, resulting in advantages such as less wear, longer lifespan, and more precise and intelligent control. However, these magnetic induction knob modules typically use a ring magnet to attach the rotating body to the work surface, which is aesthetically pleasing and easy to clean. But since they only rely on the principle of magnetic field changes to recognize rotation, without any intermediate attraction or support mechanism, the feel is poor and it is easy to overuse.

[0031] Please refer to the following: Figure 1 and Figure 2 This application provides a magnetic induction knob module 100, which includes a substrate 10, a knob 20, and a sensing control component 30. The knob 20 is disposed on one side of the substrate 10 and includes a knob body 21 and a first permanent magnet 22 disposed on the knob body 21. The sensing control component 30 includes a magnetic sensor 31, a resistance coil 32, and a controller 33. The magnetic sensor 31 and the resistance coil 32 are respectively communicatively connected to the controller 33, and both the magnetic sensor 31 and the resistance coil 32 are disposed opposite to the first permanent magnet 22. The magnetic sensor 31 is used to sense the rotation state of the first permanent magnet 22, and the resistance coil 32 is used to generate a magnetic field that opposes the rotation of the first permanent magnet 22.

[0032] The magnetic induction knob module 100 is a control component that can be applied to household appliances, allowing users to control the appliances by rotating the knob 20 in conjunction with the induction control component 30, such as adjusting the power and brightness.

[0033] The substrate 10 serves as the control platform for the magnetic induction knob module 100, supporting the knob component 20 and defining the external structure of the magnetic induction knob module 100. In some embodiments, the substrate 10 may be flat to be mounted on a supporting surface (stovetop, wall) during installation; in other embodiments, the substrate 10 may be a bent plate or a curved panel to adapt to different assembly environments. This application will only describe the substrate 10 as a flat plate as an example.

[0034] The knob 20 is a component that can be directly operated by the user and is the main component in the magnetic induction knob module 100 that interacts with the user. The knob 20 being located on one side of the base plate 10 means that the knob 20 is located on the side of the base plate 10 facing the user.

[0035] For example, in an embodiment where the magnetic induction knob module 100 is used to control the flame size of a gas stove, the substrate 10 is placed on the stovetop. In this case, the knob 20 is located on the side of the substrate 10 away from the stovetop for interaction with the user. In an embodiment where the magnetic induction knob module 100 is used for household appliances such as ovens and water heaters, the substrate 10 can be a wall of the outer shell of the household appliance such as the oven or water heater. In this case, the knob 20 is located on the side of the substrate 10 away from the internal space of the outer shell for interaction with the user.

[0036] The knob component 20 includes a knob body 21 and a first permanent magnet 22 disposed on the knob body 21. The knob body 21 is a structural component of the knob component 20, and the first permanent magnet 22 is a core control component of the knob component 20. During use, the user can rotate the knob body 21 to drive the first permanent magnet 22 to rotate accordingly, thereby enabling the sensing control component 30 to sense the change in the magnetic field position of the first permanent magnet 22 and determine the operation performed by the user.

[0037] The first permanent magnet 22 and the knob body 21 can be connected by integral molding, adhesive bonding or other fixed connection methods to enhance the structural consistency between the first permanent magnet 22 and the knob body 21, and reduce the risk of misinterpretation of user operation by the magnetic induction knob module 100 due to loosening between the first permanent magnet 22 and the knob body 21. In some embodiments, the first permanent magnet 22 and the knob body 21 can also be slidably connected to further improve the operation mode between the sensing control component 30 and the knob 20. That is, in these embodiments, in addition to transmitting control commands to the sensing control component 30 by rotating the knob body 21 to drive the first permanent magnet 22 to rotate, the user can also transmit other control commands to the sensing control component 30 by controlling the sliding between the first permanent magnet 22 and the knob body 21 to change the relative position relationship between the first permanent magnet 22 and the sensing control component 30 (non-rotation mode).

[0038] The sensing control component 30 is used to cooperate with the knob 20 (specifically, with the first permanent magnet 22) and to make corresponding controls by sensing the user's operation of the knob 20, so that the user can feel the damping when operating the knob 20, thereby improving the user's operating experience.

[0039] The sensing control component 30 includes a magnetic sensor 31, a resistance coil 32, and a controller 33, wherein the magnetic sensor 31 and the resistance coil 32 are respectively communicatively connected to the controller 33.

[0040] The magnetic sensor 31 is a component used to sense changes in the magnetic field of the first permanent magnet 22. Specifically, the magnetic sensor 31 can at least sense the direction and angle of rotation of the magnetic field of the first permanent magnet 22. At the same time, since the magnetic sensor 31 is connected to the controller 33, the magnetic sensor 31 can transmit the sensed changes in the magnetic field of the first permanent magnet 22 to the controller 33 so that the controller 33 can control the resistance coil 32 to perform a response operation.

[0041] In these embodiments of this application, the resistance coil 32 is an electromagnet and is communicatively connected to the controller 33. When the controller 33 receives the magnetic field change signal of the first permanent magnet 22 transmitted by the magnetic sensor 31, the controller 33 can send a working command to the resistance coil 32 to energize the resistance coil 32 or change the amount of electricity passing through the resistance coil 32, thereby changing the magnitude of the magnetic field generated by the electromagnetic conversion of the resistance coil 32 to correspond to the rotation of the first permanent magnet 22, so that the user feels a certain resistance when operating the knob 20, thus improving the user's operating experience.

[0042] In these embodiments of the present application, the magnetic sensor 31 may be a 3D Hall sensor.

[0043] In these embodiments of the present application, the resistance coil 32 can be powered by its own power source. That is, after receiving the magnetic field change signal transmitted by the magnetic sensor 31, the controller 33 directly sends a working command to the power source of the resistance coil 32 to use the power source to power the resistance coil 32 and generate a magnetic field. In some embodiments, the resistance coil 32 can also be electrically connected to an external power source. After receiving the working command from the controller 33, the resistance coil 32 drives the external power source to power itself and generates a magnetic field to resist the rotation of the knob 20.

[0044] The magnetic sensor 31 and the resistance coil 32 are respectively connected to the controller 33 for communication. This means that the magnetic sensor 31 and the resistance coil 32 can be connected to the controller 33 by wired or wireless means, so that the magnetic sensor 31, the resistance coil 32 and the controller 33 can adapt to different working conditions, realize their respective signal transmission, and improve the stability and reliability of signal transmission.

[0045] The magnetic sensor 31 and the resistance coil 32 are both arranged opposite to the first permanent magnet 22. This means that the magnetic field of the first permanent magnet 22 can be sensed by the magnetic sensor 31, and the magnetic field generated by the resistance coil 32 after being energized can interact with the magnetic field of the first permanent magnet 22, so as to increase the rotational resistance when the lifting knob 20 is rotated.

[0046] The magnetic sensor 31 is used to sense the rotation state of the first permanent magnet 22. The magnetic sensor 31 converts the change in the magnetic field of the first permanent magnet 22 when it rotates into an electrical signal and transmits it to the controller 33. It has a fast response speed and is not sensitive to environmental factors such as temperature and dust. At the same time, the non-contact sensing mode can improve the service life of the secondary sensing knob module 100.

[0047] The resistance coil 32 is used to generate a magnetic field that opposes the rotation of the first permanent magnet 22. This means that the direction and magnitude of the magnetic field generated by the resistance coil 32 can be controlled by the controller 33 through calculations, such as controlling the direction and magnitude of the current in the resistance coil 32. By controlling the direction and magnitude of the magnetic field generated by the resistance coil 32, the controller 33 ensures that when the user rotates the knob 20, the first permanent magnet 22 will be subjected to a reverse damping force from the resistance coil 32. This makes the user's feel when rotating the knob 20 closer to that of a mechanical knob, improving the user's operating experience and increasing reliability.

[0048] According to the magnetic induction knob module 100 provided in the embodiments of this application, the induction control component 30 includes a magnetic sensor 31, a resistance coil 32, and a controller 33. The magnetic sensor 31 and the resistance coil 32 are respectively connected to the controller 33 in communication. The magnetic sensor 31 and the resistance coil 32 are both arranged opposite to the first permanent magnet 22. The magnetic sensor 31 can sense the rotation state of the first permanent magnet 22, that is, the knob 20. When the knob 20 rotates, the controller 33 can control the resistance coil 32 to work in time to generate a magnetic field to prevent the knob 20 from rotating. This allows the user to obtain good resistance feedback when rotating the knob 20, thus improving the user's operating feel.

[0049] In some embodiments, the sensing control component 30 further includes a second permanent magnet 34, which is disposed on the side of the substrate 10 away from the knob 20, and the second permanent magnet 34 and the first permanent magnet 22 are attracted to each other.

[0050] The function of the second permanent magnet 34 is to change the connection between the knob 20 and the substrate 10. In embodiments where the sensing control component 30 does not have the second permanent magnet 34, the knob 20 may be connected to the substrate 10 through components such as an annular groove formed on the substrate 10 or a connecting shaft provided at the axis of the knob 20.

[0051] In these embodiments of the present application, by providing a second permanent magnet 34 on the side of the substrate 10 away from the knob 20, and by having the second permanent magnet 34 and the first permanent magnet 22 attract each other, the knob 20 and the substrate 10 are not connected by any connecting components, and the knob 20 is connected to the substrate 10 solely by the mutual attraction between the first permanent magnet 22 and the second permanent magnet 34.

[0052] In this way, the number of indirect components between the knob 20 and the substrate 10 can be further reduced, and the production efficiency of the magnetic induction knob module 100 can be further improved during the production process. At the same time, the method of not setting connecting components between the knob 20 and the substrate 10 can reduce the risk of shortening the service life of the knob 20 due to damage to the connecting components.

[0053] It is understood that in these embodiments of this application, the surface of the substrate 10 for mounting the knob 20 may be made of a smooth material such as glass or ceramic with a certain degree of hardness, so as to reduce the friction between the knob 20 and the substrate 10, thereby further improving the user's operating experience.

[0054] In some embodiments, a blind hole 211 is provided on the surface of the knob body 21 away from the substrate 10, the first permanent magnet 22 is confined within the blind hole 211, and the first permanent magnet 22 can move within the blind hole 211 along the direction from one side to the other side of the substrate 10.

[0055] The first permanent magnet 22 is slidably connected to the knob body 21, allowing the first permanent magnet 22 to move within the blind hole 211 in a direction that approaches or moves away from the magnetic sensor 31. In this case, the magnetic sensor 31 can not only sense the rotational state of the first permanent magnet 22, but also sense the distance between the first permanent magnet 22 and itself, thus providing a new possibility for the user to interact with the controller 33 via the knob 20.

[0056] In other words, when the user rotates the knob 20, the controller 33 can control the resistance coil 32 to be energized through the signal transmitted by the magnetic sensor 31, and form a damping force opposite to the direction of rotation. The user rotating the knob 20 is a way to interact with the controller 33. In these embodiments of this application, the user can also interact with the controller 33 by pressing the first permanent magnet 22, thereby realizing other controls.

[0057] In some embodiments, the knob 20 further includes an elastic element 23, which is disposed in the blind hole 211 and connects the first permanent magnet 22 to the bottom wall of the blind hole 211.

[0058] The elastic element 23 connects the first permanent magnet 22 to the bottom wall of the blind hole 211, so that the first permanent magnet 22 can automatically spring back to reset, further improving the reliability of the knob 20.

[0059] In these embodiments of the present application, the elastic element 23 may be, but is not limited to, a helical spring, a disc spring, or a rubber spring.

[0060] In some embodiments, the number of elastic elements 23 can be multiple, and the multiple elastic elements 23 are evenly distributed between the first permanent magnet 22 and the bottom wall of the blind hole 211, so as to keep the rebound performance of the first permanent magnet 22 consistent at each position.

[0061] In some embodiments, the sensing control component 30 further includes a display control module 35, which is disposed on the substrate 10 and is communicatively connected to the controller 33.

[0062] The display control module 35 is another component in the magnetic induction knob module 100 that can interact with the controller 33. It is understood that the display control module 35 includes a touch screen, which is disposed on the surface of the substrate 10 on which the knob 20 is disposed, to transmit information to the user and receive the user's control commands.

[0063] The display control module 35 is disposed on the substrate 10, which means that the control chip, power supply and other components in the display control module 35 can be connected to the substrate 10 to support the substrate 10, or the control chip, power supply and other components can be embedded in the substrate 10 to improve the connection and tightness between the display control module 35 and the substrate 10.

[0064] For example, in these embodiments of this application, the user can move the first permanent magnet 22 within the blind hole 211 by pressing it. After the magnetic sensor 31 senses a change in the distance between itself and the first permanent magnet 22, it sends a signal to the controller 33. Upon receiving the signal, the controller 33 can send a working command to the display control module 35 to display the current setting parameters of the controller 33 on the touch screen. The user can adjust the parameters of the controller 33, such as the magnitude of the reverse force of the resistance coil 32 and the brightness parameters of the touch screen itself, by interacting with the touch screen.

[0065] In some embodiments, the display control module 35 and the controller 33, the magnetic sensor 31 and the controller 33, and the resistance coil 32 and the controller 33 are all connected by wired communication.

[0066] In these embodiments of this application, by setting wired communication connections between the display control module 35 and the controller 33, between the magnetic sensor 31 and the controller 33, and between the resistance coil 32 and the controller 33, the number of wireless waves generated in the magnetic induction knob module 100 can be reduced, the possibility of interference between different wireless waves can be reduced, and the reliability of the magnetic induction knob module 100 can be further improved, thereby further enhancing the user's operating experience.

[0067] In some embodiments, the magnetic sensor 31, the resistance coil 32, and the controller 33 are all disposed on the side of the substrate 10 away from the knob 20.

[0068] In other words, in the structure of the magnetic induction knob module 100, except for the knob 20 which is located on the side of the substrate 10 closer to the user, the magnetic sensor 31, the resistance coil 32, the second permanent magnet 34, and the controller 33 are all located on the surface away from the user. This can be achieved by setting a support structure on the surface of the substrate 10 away from the knob 20 and connecting the magnetic sensor 31, the resistance coil 32, the second permanent magnet 34, and the controller 33 to the support structure.

[0069] In this way, the surface of the substrate 10 with the knob 20 can be made cleaner and tidier, which is beneficial for users to clean the outer surface of the substrate 10 during subsequent use, thereby further improving the user experience.

[0070] This application also provides a household appliance, which includes a magnetic induction knob module 100 as provided in any of the foregoing embodiments.

[0071] Please refer to the following: Figures 1 to 3 This application also provides a knob control method for controlling a magnetic induction knob module 100 as provided in any of the foregoing embodiments. The knob control method includes the following steps:

[0072] Step S1: The magnetic sensor 31 senses the magnetic field change signal of the first permanent magnet 22 in real time and transmits the magnetic field change signal to the controller 33.

[0073] During the manufacturing process of the magnetic induction knob module 100, the relative positions of the first permanent magnet 22 and the magnetic sensor 31 can be controlled so that the magnetic field generated by the first permanent magnet 22 can cover the location of the magnetic sensor 31. This allows the magnetic sensor 31 to detect changes in the magnetic field of the first permanent magnet 22 in real time, and when the magnetic field of the first permanent magnet 22 changes (when the user rotates the knob 20), the change signal is transmitted to the controller 33.

[0074] In step S2, the controller 33 determines the rotation direction of the first permanent magnet 22 based on the magnetic field change signal and sends a working command to the resistance coil 32.

[0075] In this step, the controller 33 determines the rotation direction of the first permanent magnet 22 based on the signal transmitted by the magnetic sensor 31. Taking multiple Hall sensors as an example, two magnetic sensors 31 can be placed near the rotation path of the magnetic field of the first permanent magnet 22 at a certain distance (e.g., 90° electrical angle). When the magnetic field of the first permanent magnet 22 rotates, the two magnetic sensors 31 will output sine or square wave signals with a phase difference of 90°. At this time, the rotation direction of the first permanent magnet 22 can be determined by analyzing the phase relationship between the two signals through a comparator or microcontroller.

[0076] Step S3: The resistance coil 32 is energized and generates a magnetic field that interacts with the first permanent magnet 22 to generate a first resistance in the rotation direction of the first permanent magnet 22.

[0077] At this time, the controller 33 can control the direction and magnitude of the current passing through the resistance coil 32, thereby controlling the direction and magnitude of the magnetic field generated by the resistance coil 32, and generating a first resistance in the rotation direction of the first permanent magnet 22, so as to provide damping force for the user to rotate the knob 20.

[0078] According to the magnetic induction knob module 100 provided in the embodiments of this application, the induction control component 30 includes a magnetic sensor 31, a resistance coil 32, and a controller 33. The magnetic sensor 31 and the resistance coil 32 are respectively connected to the controller 33 in communication. The magnetic sensor 31 and the resistance coil 32 are both arranged opposite to the first permanent magnet 22. The magnetic sensor 31 can sense the rotation state of the first permanent magnet 22, that is, the knob 20. When the knob 20 rotates, the controller 33 can control the resistance coil 32 to work in time to generate a magnetic field to prevent the knob 20 from rotating. This allows the user to obtain good resistance feedback when rotating the knob 20, thus improving the user's operating feel.

[0079] In some embodiments, when the magnetic sensor 31 does not detect a change in the magnetic field of the first permanent magnet 22, the controller 33 sends a standby command to the resistance coil 32. The resistance coil 32 remains energized and generates a magnetic field that interacts with the first permanent magnet 22 to generate a second resistance in a preset rotation direction of the first permanent magnet 22. The second resistance is less than the first resistance and less than the friction between the knob 20 and the substrate 10.

[0080] It is understandable that the control logic of the magnetic induction knob module 100 is that the user first rotates the knob 20, and then the magnetic sensor 31, controller 33 and resistance coil 32 cooperate to generate a damping force in the opposite direction of rotation. This setting may result in a certain lag in the generation of damping force, which reduces the user's initial operating feel when rotating the knob 20.

[0081] Based on this, in these embodiments of the present application, when the magnetic sensor 31 does not detect a change in the magnetic field of the first permanent magnet 22, the controller 33 sends a standby command to the resistance coil 32. The standby command causes the resistance coil 32 to remain energized and generate a magnetic field that interacts with the first permanent magnet 22, thereby generating a second resistance in a predetermined rotational direction of the first permanent magnet 22.

[0082] Understandably, the second resistance is a damping force pre-applied to the first permanent magnet 22 to improve the user's initial feel when turning the knob 20, thereby reducing the impact of the hysteresis generated by the damping force on the user's operating feel.

[0083] The second resistance is less than the friction between the knob 20 and the base plate 10. This means that the second resistance will not cause the knob 20 to rotate on its own without external force applied (when the user does not operate it). Moreover, it can quickly provide damping force to the user in the initial stage of the user turning the knob 20, improve the user's operating feel in the initial stage of operation, and make it more reliable.

[0084] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A magnetic induction knob module, characterized in that, include: substrate; A knob component is disposed on one side of the substrate and includes a knob body and a first permanent magnet disposed on the knob body; The sensing control component includes a magnetic sensor, a resistance coil, and a controller. The magnetic sensor and the resistance coil are respectively communicatively connected to the controller, and both the magnetic sensor and the resistance coil are disposed opposite to the first permanent magnet. The magnetic sensor is used to sense the rotational state of the first permanent magnet, and the resistance coil is used to generate a magnetic field that opposes the rotation of the first permanent magnet.

2. The magnetic induction knob module according to claim 1, characterized in that, The sensing control component further includes a second permanent magnet, which is disposed on the side of the substrate away from the knob, and the second permanent magnet is attracted to the first permanent magnet.

3. The magnetic induction knob module according to claim 1, characterized in that, The knob body has a blind hole on the surface away from the substrate. The first permanent magnet is confined within the blind hole and can move within the blind hole along one side of the substrate to the other.

4. The magnetic induction knob module according to claim 3, characterized in that, The knob also includes an elastic element, which is disposed within the blind hole and connects the first permanent magnet to the bottom wall of the blind hole.

5. The magnetic induction knob module according to claim 3, characterized in that, The sensing control component further includes a display control module, which is disposed on the substrate and is communicatively connected to the controller.

6. The magnetic induction knob module according to claim 5, characterized in that, The display control module and the controller, the magnetic sensor and the controller, and the resistance coil and the controller are all connected by wired communication.

7. The magnetic induction knob module according to any one of claims 1 to 6, characterized in that, The magnetic sensor, the resistance coil, and the controller are all located on the side of the substrate away from the knob.

8. A household appliance, characterized in that, Includes the magnetic induction knob module as described in any one of claims 1 to 7.

9. A knob control method, characterized in that, The method for controlling the magnetic induction knob module as described in any one of claims 1 to 7 includes the following steps: The magnetic sensor senses the magnetic field change signal of the first permanent magnet in real time and transmits the magnetic field change signal to the controller. The controller determines the rotation direction of the first permanent magnet based on the magnetic field change signal and sends a working command to the resistance coil. The resistance coil is energized and generates a magnetic field that interacts with the first permanent magnet to produce a first resistance in the rotational direction of the first permanent magnet.

10. The knob control method according to claim 9, characterized in that, When the magnetic sensor does not detect a change in the magnetic field of the first permanent magnet, the controller sends a standby command to the resistance coil. The resistance coil remains energized and generates a magnetic field that interacts with the first permanent magnet to produce a second resistance in the preset rotation direction of the first permanent magnet. The second resistance is less than the first resistance, and the second resistance is less than the frictional force between the knob and the substrate.

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