Knob and electric appliance

Abstract

This utility model relates to the field of knobs, and discloses a knob and an electrical appliance. The knob includes: a first component; a second component rotatably disposed relative to the first component about a rotation axis, wherein one of the first component and the second component is a stator component of the knob, and the other is a rotor component of the knob; a flexible magnetic strip fixed to the second component, the flexible magnetic strip being bent to extend along the rotational circumference of the second component and having multiple pairs of magnetic poles distributed along its extension direction; and a magnetic sensor fixed to the first component and used to sense the magnetic poles of the flexible magnetic strip. The electrical appliance includes a housing and the knob fixed to the housing. This utility model uses a freely cut and bendable flexible magnetic strip to replace a magnetic ring of fixed size, which is beneficial for flexibly designing and manufacturing knobs of different sizes in a low-cost manner, reducing the limitations on knob size design, and is more economical.

Description

Technical Field

[0001] This utility model relates to the field of knobs, and more particularly to a knob and an electrical appliance. Background Technology

[0002] The knob includes a stator component and a rotor component rotatably mounted on the stator component. A magnetic sensor is fixedly mounted on the stator component / rotor component, and a magnetic body is fixedly mounted on the rotor component / stator component. When the rotor component rotates relative to the stator component, the magnetic sensor detects the rotational position or movement of the rotor component by sensing the magnetic poles of the magnetic body, thereby realizing the knob function.

[0003] Furthermore, some existing knobs use multi-pole magnetic rings as the magnetic material. When the rotor component rotates relative to the stator component, the magnetic sensor alternately detects the N poles and S poles of the multi-pole magnetic ring, thereby realizing the detection of the rotational position / motion of the rotor component. In this way, by selecting multi-pole magnetic rings of different models and sizes, different requirements caused by changes in knob size and functional component stacking can be met, which helps to make the knob design more flexible to a certain extent.

[0004] However, on the one hand, the available models and sizes of multipole magnetic rings are limited, which still restricts the stacking design of other parts of the knob. The flexibility of the knob design still needs to be improved (or the magnetic rings need to be customized according to the model and size of the knob, which increases the overall cost of the multipole magnetic rings and the knobs). On the other hand, in order to obtain a variety of different knobs, a variety of different models and sizes of multipole magnetic rings are required, resulting in a large number of parts, greater management difficulty, and poor economic efficiency. Summary of the Invention

[0005] One of the purposes of this application is to overcome the aforementioned deficiencies of the prior art and provide a knob that offers greater design flexibility and better cost-effectiveness.

[0006] This application provides a knob. The technical solution adopted is as follows: A knob includes: a first component; a second component rotatably disposed relative to the first component about a rotation axis; one of the first component and the second component being a stator component of the knob, and the other being a rotor component of the knob; further comprising: a flexible magnetic strip fixed to the second component, the flexible magnetic strip being bent to extend along the rotational circumference of the second component and having multiple pairs of magnetic poles distributed along its extension direction; and a magnetic sensor fixed to the first component and used to sense the magnetic poles of the flexible magnetic strip.

[0007] As can be seen from the above, since a flexible magnetic strip can be cut to different lengths and bent to different diameters / radiuses, this application can meet the usage and design requirements of knobs of different sizes in a low-cost manner by cutting and bending flexible magnetic strips (for example, for large-size, high-precision detection scenarios, flexible magnetic strips with longer lengths and larger diameters / radiuses can be cut and bent; while for small-size / low-precision detection scenarios, flexible magnetic strips with shorter lengths and smaller diameters / radiuses can be cut and bent). This is beneficial for flexibly designing and manufacturing knobs of different sizes in a low-cost manner. The design and manufacturing restrictions of the knobs in this application are small, and the flexibility is good, which is conducive to designing and manufacturing knobs of corresponding sizes as needed according to the usage requirements of different application scenarios. The technical solution of this application is particularly suitable for situations with a small number of knobs, such as in the small-batch stage.

[0008] Furthermore, since the flexible magnetic strip has multiple pairs of magnetic poles, a single flexible magnetic strip can be used to detect multiple positions / angles of the rotor component relative to the stator component. Moreover, the distribution pattern of each magnetic pole can be determined by a high-precision magnetization device when the flexible magnetic strip is magnetized. The relative positional relationship of each magnetic pole will not be incorrect due to assembly errors during the assembly and production of the knob, which is beneficial to improving the quality and yield of the knob.

[0009] Furthermore, the second component has a first positioning wall extending along the rotational circumference and facing the rotational axis, and the flexible magnetic strip contacts and engages with the first positioning wall.

[0010] As can be seen from the above, positioning the flexible magnetic strip by the first positioning wall surface on the outer peripheral sidewall makes it easier to make the flexible magnetic strip in the knob accurate and stable in shape.

[0011] Furthermore, the second component has a second positioning wall surface that extends along the circumferential direction of rotation and faces the flexible magnetic strip in the direction of extension along the axis of rotation, and the flexible magnetic strip contacts and engages with the second positioning wall surface.

[0012] As can be seen from the above, this further helps to ensure that the flexible magnetic strip is in an accurate and stable position within the knob.

[0013] Furthermore, the flexible magnetic strip is glued to the second component.

[0014] As can be seen from the above, the material is fixedly attached to the second component and can move with the second component, making it easy to achieve.

[0015] Furthermore, the flexible magnetic strip is a rubber magnetic strip.

[0016] Furthermore, each pair of magnetic poles is arranged in an array along the extension direction of the flexible magnetic strip and is adjacent to each other.

[0017] As can be seen above, by sequentially cutting the same length from the same raw material, multiple flexible magnetic strips with identical lengths and magnetic pole distribution patterns can be obtained. This helps improve the consistency of performance among knobs in the same batch.

[0018] Furthermore, the flexible magnetic strip is bent into an arc shape.

[0019] As can be seen from the above, while ensuring that the magnetic sensor can detect changes in the magnetic field, reducing the length of the flexible magnetic strip can lower its cost.

[0020] Furthermore, the flexible magnetic strip is bent into a circular ring with its ends connected.

[0021] As can be seen from the above, the flexible magnetic strip can be wrapped around the entire circle, allowing for the setting of multiple pairs of magnetic poles. The magnetic sensor can detect uniform and stable magnetic field changes, improving detection accuracy and user experience. Furthermore, the flexible magnetic strip is connected at both ends in the second component, enabling the positioning of its extension direction.

[0022] Furthermore, the rotor component includes a cylindrical body and a transparent protective plate. The cylindrical body is sleeved around the outer periphery of the stator component, and the transparent protective plate is sealed to one end of the cylindrical body along the extension direction of the rotation axis. The stator component is fixedly provided with a display component, which faces the transparent protective plate and is located within the space enclosed by the transparent protective plate and the cylindrical body.

[0023] As can be seen from the above, the transparent protective plate makes it convenient for users to view the display content of the display components; the sealed connection of the cylinder and the transparent protective plate helps to provide better protection for the internal display components, and helps to reduce the intrusion of dust or water into the knob through the front, thus improving the waterproof and dustproof effect.

[0024] Furthermore, the flexible magnetic strip is fixed to the rotor component, and the electronic control assembly of the knob is fixed to the stator component, and is at least partially located radially inside the flexible magnetic strip.

[0025] The second objective of this application is to provide an electrical appliance comprising a housing and the aforementioned knob, wherein the stator component is fixed to the housing.

[0026] Furthermore, the stator component has an insert structure that protrudes outward along the extension direction of the rotation axis, and the side wall of the insert structure has a mounting slot; the housing has an outwardly protruding mounting cylinder, and the insert structure is detachably inserted into the cylinder cavity of the mounting cylinder, with fasteners connected to the cylinder wall of the mounting cylinder and inserted into the mounting slot to achieve a fixed fit between the insert structure and the mounting cylinder.

[0027] As can be seen from the above, fasteners are installed on the side wall of the mounting cylinder to install the knob, which allows the knob to be removed separately without disassembling the main structure of the electrical appliance, thus reducing the difficulty of disassembling and assembling the knob. Attached Figure Description

[0028] Figure 1 This is a structural diagram of an embodiment of the present utility model; Figure 2 This utility model Figure 1 Cross-sectional view of the embodiment shown; Figure 3 This utility model Figure 1 Explosion of the illustrated embodiment Figure 1 ; Figure 4 This utility model Figure 1 Explosion of the illustrated embodiment Figure 2 ; Figure 5 This utility model Figure 1 A schematic diagram of the flexible magnetic strip in the embodiment shown; Figure 6 This is a schematic diagram of a flexible magnetic strip according to an optional embodiment of the present invention.

[0029] The parts referred to by the numbers in the attached diagram are as follows: 100—Stator component, 200—Rotor component, 3—Magnetic sensor, 4—Mounting post, 5—Snap-fit ​​hole, 6—Slider, 7—Insertion structure, 8—Mounting hole, 9—Elastic locking foot, 10—Guide groove, 11—Leaf spring, 12—Slide groove, 13—First positioning wall surface, 14—Second positioning wall surface, 15—Mounting slot hole, 16—Limiting part, 17—Mounting slot. 18—First mounting hole, 101—Base, 102—Lifting bracket, 103—Support frame, 104—Circuit board, 105—Display component, 111—First sliding cylinder, 112—Connecting plate, 113—Guide post, 121—Bearing plate, 122—Second sliding cylinder, 201—Cylinder body, 202—Transparent protective plate, 203—Flexible magnetic strip, 211—Gear, 212—Boss, 231—S pole, 232—N pole. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "inner" and "outer", etc., 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 on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. Example

[0034] This embodiment Figures 1 to 4 A unified spatial rectangular coordinate system (right-handed system) is adopted to represent the relative positional relationship between the features, wherein the Z-axis direction is the extension direction of the rotation axis of the rotor component 200.

[0035] like Figures 1 to 4 As shown, the knob in this embodiment includes a stator component 100 and a rotor component 200 that can rotate relative to the stator component 100 about a rotation axis. The stator component 100 includes a base 101, a reset mechanism (not shown in the figure), a lifting bracket 102, a circuit board 104, a support frame 103, and a display component 105 arranged sequentially along the positive end of the Z-axis. The lifting bracket 102 is movably mounted on the base 101 along the Z-axis direction. The circuit board 104 (an example of the electronic control component of the knob) is fixed to the lifting bracket 102. The display component 105 is fixed to the lifting bracket 102 through the support frame 103.

[0036] In this embodiment, the stator component 100 is the first component and the rotor component 200 is the second component. The flexible magnetic strip 203 is fixed to the rotor component 200, and the magnetic sensor 3 is fixed to the stator component 100. In other embodiments, the stator component 100 can also be the second component and the rotor component 200 the first component. The flexible magnetic strip 203 is fixed to the stator component 100, and the magnetic sensor 3 is fixed to the rotor component 200. This still enables the detection of the relative position / motion between the rotor component 200 and the stator component 100. Of course, it is preferable to adopt the scheme of the stator component 100 as the first component and the rotor component 200 as the second component, as this facilitates the wired electrical connection of the magnetic sensor 3 to an external structure (such as the control components of an electrical appliance).

[0037] The rotor component 200 includes a cylinder 201 that surrounds the outer periphery of the support frame 103 and is rotatably mounted on the lifting bracket 102. The rotation axis of the rotor component 200 extends along the Z-axis. The assembly of the lifting bracket 102 and the rotor component 200 is located on the positive Z-axis side of the base 101. A reset mechanism is pressed between the base 101 and the lifting bracket 102 along the Z-axis. The reset mechanism provides a reset force for the assembly to reset along the positive Z-axis. When the user presses the assembly of the rotor component 200 and the lifting bracket 102 along the negative Z-axis, the pressing force overcomes the reset force of the reset mechanism and forces the assembly to move in the negative Z-axis direction. When the pressing force applied by the user is removed, the reset force of the reset mechanism forces the assembly to reset along the positive Z-axis to the positive Z-axis end of its travel stroke.

[0038] The rotor component 200 also includes a flexible magnetic strip 203, which is fixedly installed on the inner peripheral wall of the cylinder 201. Specifically, a boss 212 protruding radially inward is integrally formed on the inner peripheral side wall of the cylinder 201. The boss 212 extends along the rotational circumference of the cylinder 201 to form an annular shape. The centerline of the boss 212 and the centerline of the cylinder 201 coincide with the rotation axis of the rotor component 200. The inner peripheral wall surface of the cylinder 201 located on the positive Z-axis side of the boss 212 constitutes the first positioning wall surface 13. Extending circumferentially along the rotor component 200 and toward the rotation axis, the positive Z-axis end face of the boss 212 forms the second positioning wall 14. The second positioning wall 14 extends circumferentially along the cylinder 201 and toward the flexible magnetic strip 203 along the extension direction of the rotation axis. The negative Z-axis end face of the flexible magnetic strip 203 is in contact with the second positioning wall 14 to achieve positioning of the flexible magnetic strip 203 in the Z-axis direction. The outer peripheral wall of the flexible magnetic strip 203 is in contact with the first positioning wall 13 to achieve radial positioning of the flexible magnetic strip 203.

[0039] In this embodiment, the flexible magnetic strip 203 is fixedly connected to the cylinder 201 by adhesive. Adhesive bonding is simple, convenient, and reliable. Alternatively, in other embodiments, the flexible magnetic strip 203 can be positioned using snap-fit ​​mechanisms, positioning protrusions, or other methods.

[0040] like Figure 5 As shown, in this embodiment, the flexible magnetic strip 203 is bent into a ring shape extending circumferentially along the rotation of the cylinder 201 and connected end to end. It has multiple pairs of magnetic poles distributed along its extension direction, and the centerline of the flexible magnetic strip 203 coincides with the rotation axis of the rotor component 200. Alternatively, as... Figure 6 As shown, in other embodiments, the flexible magnetic strip 203 can also be configured as an arc extending along the rotational circumference of the rotor component 200, and its two ends along the rotational circumference can be positioned by providing protrusions on the first positioning wall and / or the second positioning wall, or by being positioned by a snap-fit. The flexible magnetic strip 203 can be configured as a ring or an arc, depending on the knob's angle / position detection requirements for the rotor component 200.

[0041] The flexible magnetic strip 203 in this embodiment is a bendable and deformable strip with multiple N poles and multiple S poles alternately distributed along its length. Specifically, the flexible magnetic strip 203 is typically made of a flexible adhesive (such as rubber, synthetic rubber, or plastics such as CPE, PVC, and EVA) as the base material, combined with magnetic powder (such as barium ferrite or strontium ferrite), and processed into a strip shape through processes such as extrusion molding and calendering, and then magnetized. For example, the flexible magnetic strip 203 in this embodiment is a rubber magnetic strip with multiple pairs of magnetic poles alternately distributed along its length.

[0042] In this embodiment, each S pole 231 and each N pole 232 are alternately distributed and adjacent to each other along the extension direction of the flexible magnetic strip 203. Optionally, in other embodiments, each pair of magnetic poles of the flexible magnetic strip 203 can be spaced apart along the extension direction of the flexible magnetic strip 203, that is, each pair of magnetic poles is not adjacent to each other (for example, there is a non-magnetized area or gap between the magnetic poles). Of course, the preferred technical solution in this embodiment is that each S pole 231 and each N pole 232 are alternately distributed and adjacent to each other along the extension direction of the flexible magnetic strip 203. This allows for the sequential cutting of the same length from the same raw material (flexible magnetic strip), resulting in multiple flexible magnetic strips with the same length and magnetic pole distribution pattern. This is beneficial for improving the consistency of the performance of each knob in the same batch.

[0043] Since the flexible magnetic strip 203 of this embodiment can be cut to different lengths and bent to different diameters / radiuses, it is possible to meet the usage and design requirements of knobs of different sizes in a low-cost manner by cutting and bending the flexible magnetic strip 203. (For example, for large-size, high-precision detection scenarios, a longer flexible magnetic strip 203 with a larger diameter / radius can be cut and bent; while for small-size / low-precision detection scenarios, a shorter flexible magnetic strip 203 with a smaller diameter / radius can be cut and bent.) This facilitates the flexible design and manufacture of knobs of different sizes at low cost. The design and manufacturing restrictions of the knobs in this embodiment are relatively small, which is conducive to designing and manufacturing knobs of corresponding sizes as needed according to the usage requirements of different application scenarios. This is especially suitable for situations with a small number of knobs, such as in small-batch production.

[0044] The rotor component 200 also includes a transparent protective plate 202, which is sealed to the outer peripheral wall of the cylinder 201 by adhesive or other means. This prevents water or dust from flowing in or seeping into the cylinder 201 from the connection between the transparent protective plate 202 and the cylinder 201. It provides frontal protection for the display component 105, circuit board 104, etc., located inside the transparent panel and cylinder 201, reducing the intrusion of dust or water into the knob from the front and improving waterproof and dustproof performance. The display component 105 faces the transparent protective plate 202 and is located within the space enclosed by the transparent protective plate 202 and the cylinder 201.

[0045] During the process of the user rotating the cylinder 201, the flexible magnetic strip 203 rotates with the cylinder 201. The magnetic sensor 3 adjacent to the inner circumferential sidewall of the flexible magnetic strip 203 senses the magnetic field changes of the multiple pairs of magnetic poles of the flexible magnetic strip 203 and outputs corresponding voltage or pulse signals, thereby realizing the rotation detection of the knob.

[0046] The transparent protective plate 202, the circuit board 104, and the display component 105 are all placed flat on the plane formed by the X-axis and Y-axis.

[0047] In this embodiment, the base 101 includes a first sliding cylinder 111, which is a cylindrical shape with its center line along the Z-axis.

[0048] The lifting bracket 102 includes an integrally formed support plate 121 and a second sliding cylinder 122. The support plate 121 is annular, and the second sliding cylinder 122 is cylindrical. The diameter of the second sliding cylinder 122 is smaller than the diameter of the support plate 121. The second sliding cylinder 122 extends from the radially inner end of the support plate 121 toward the negative Z-axis. The center lines of both the support plate 121 and the second sliding cylinder 122 coincide with the rotation axis of the rotor component 200. The outer edge of the positive Z-axis end face of the support plate 121 has a guide groove 10 that is recessed toward the negative Z-axis and extends circumferentially to form an annular shape. The center line of the guide groove 10 coincides with the center line of the support plate 121. The negative Z-axis end of the cylinder 201 is inserted into the guide groove 10 and is slidably engaged with the guide groove 10, enabling the rotor component 200 to rotatably engage with the stator component 100. Alternatively, in other embodiments, a bearing may be provided between the rotor component 200 and the support frame 103 to enable the rotor component 200 to be rotatably coupled relative to the stator component 100.

[0049] Lubricating oil is placed in the guide groove 10 to reduce the friction between the cylinder 201 and the bearing plate 121. At the same time, the lubricating oil is waterproof, and a small amount of water or dust that enters will be blocked in the guide groove 10, which can play a certain protective role when a small amount of water is sprayed on the side.

[0050] The second sliding cylinder 122 is fitted around the outer periphery of the first sliding cylinder 111, and the inner peripheral sidewall of the second sliding cylinder 122 is slidably engaged with the outer peripheral sidewall of the first sliding cylinder 111 along the Z-axis direction. Specifically, the inner peripheral sidewall of the second sliding cylinder 122 has a groove 12 extending along the Z-axis direction, and the outer peripheral sidewall of the first sliding cylinder 111 has a slider 6. The slider 6 is slidably engaged with the groove wall of the groove 12 along the Z-axis direction, and the engagement between the slider 6 and the groove 12 has at least three sets distributed circumferentially. Alternatively, in other embodiments of this application, the inner peripheral sidewall of the second sliding cylinder 122 may be provided with a slider 6, and the outer peripheral sidewall of the first sliding cylinder 111 may be correspondingly provided with a groove 12 extending along the Z-axis direction. Of course, in other embodiments, the first sliding cylinder 111 may be fitted around the outer periphery of the second sliding cylinder 122, and the inner peripheral sidewall of the first sliding cylinder 111 and the outer peripheral sidewall of the second sliding cylinder 122 may be slidably engaged along the Z-axis direction via the slider 6 and the groove 12.

[0051] The circuit board 104 is fixedly mounted on the positive Z-axis side of the carrier plate 121 and is fixedly connected to the carrier plate 121. Specifically, the outer edge of the circuit board 104 has a snap-fit ​​hole 5 that extends through the Z-axis direction. The carrier plate 121 has an elastic snap-fit ​​foot 9 that extends from the positive Z-axis end face to the positive Z-axis direction. The positive Z-axis end of the elastic snap-fit ​​foot 9 has a limiting part 16. The elastic snap-fit ​​foot 9 is inserted into the snap-fit ​​hole 5 in the positive Z-axis direction. The limiting part 16 passes through the snap-fit ​​hole 5 and is limited to the positive Z-axis side of the snap-fit ​​hole 5.

[0052] The support frame 103 is fixedly connected to the lifting bracket 102. Specifically, the bearing plate 121 has a mounting groove 17 recessed along the negative Z-axis, and the mounting groove 17 has a first mounting hole 18 penetrating the bearing plate 121 along the Z-axis. The negative Z-axis end face of the support frame 103 has a mounting post 4 extending along the negative Z-axis. The negative Z-axis end of the mounting post 4 passes through the circuit board 104 and is inserted into the mounting groove 17. The negative Z-axis end face of the mounting post 4 is provided with a second mounting hole corresponding to the first mounting hole 18 and extending along the positive Z-axis. Fasteners (such as screws, bolts, etc.) can be inserted into the first mounting hole 18 and the second mounting hole and locked to position the support frame 103 and fix the support frame 103 to the lifting bracket 102. The mounting groove 17 and the mounting post 4 have at least two sets of circumferentially distributed mating parts.

[0053] The display component 105 is fixed to the support frame 103. Specifically, the positive Z-axis end face of the outer edge of the display component 105 abuts against the positive Z-axis end face of the inner edge of the support frame 103. The display component 105 can be glued to the support frame 103. Optionally, in other embodiments, the display component 105 can also be fixed to the support frame 103 by means of clips or bolts. In this embodiment, the display component 105 is an LCD screen. Optionally, in other embodiments, the display component 105 can also be a digital tube. The corresponding support frame 103 can be replaced according to the user's needs to adapt to different display components 105.

[0054] The positive Z-axis end face of the connecting plate 112 is integrally formed with a guide post 113 extending along the positive Z-axis. A helical coil (an example of a reset mechanism) can be sleeved on the outer periphery of the guide post 113. The positive Z-axis end of the helical spring abuts against the negative Z-axis end of the circuit board 104, and the negative Z-axis end of the helical spring abuts against the positive Z-axis end of the connecting plate 112. The helical spring sleeved on the outer periphery of the guide post 113 provides a reset force for the lifting bracket 102 to reset along the positive Z-axis. Optionally, in other embodiments, other reset mechanisms can also be used to provide a reset force for the lifting bracket 102. For example, the reset mechanism can also be a spring sheet fixed to the lifting bracket 102 and abutting against the base 101, or a spring sheet fixed to the base 101 and abutting against the lifting bracket 102, or mutually repulsive magnets respectively fixed to the base 101 and the lifting bracket 102.

[0055] The inner circumferential sidewall of the cylinder 201 has multiple teeth 211 located at the negative Z-axis end. These teeth 211 are evenly distributed along the rotational circumference of the cylinder 201 to form a toothed ring. The bearing disk 121 is provided with an elastic mechanism that engages with the teeth 211. Specifically, the elastic mechanism is a leaf spring 11, which is located on the positive Z-axis end face of the bearing disk 121. Under its elastic force, the leaf spring 11 abuts against the teeth 211. During the user's operation of the rotor component 200, an external force is required to force the leaf spring 11 to pass over each tooth 211 one by one. Therefore, the rotational resistance of the rotor component 200 will periodically increase or decrease, resulting in a noticeable jerking sensation. Furthermore, after passing one tooth 211, the leaf spring 11 will collide with the next tooth 211, thus producing a noticeable clicking sound. In other embodiments, the elastic mechanism can also be a spring plunger, etc.

[0056] Please refer to Figures 1 to 4 The electrical appliance in this embodiment can be, for example, a refrigerator, washing machine, air conditioner, water heater, electric fan, rice cooker, gas stove, range hood, oven, etc. The appliance includes a housing and a knob with a flexible magnetic strip 203. The knob is mounted on the housing via a stator component 100, for example, by fixing the base 101 (described later) to the housing with screws, etc., for controlling the operation of the appliance. The user can control the operation of the appliance's actuators using the knob.

[0057] In one embodiment, such as Figures 1 to 4 As shown, the stator component 100 has an outwardly protruding insert structure 7 along the extension direction (Z-axis direction) of the rotation axis. The insert structure 7 is the portion of the first sliding cylinder 111 extending in the negative Z-axis direction. The side wall of the insert structure 7 has a mounting slot 15. The electrical appliance housing has an outwardly protruding mounting cylinder (not shown in the figure). The insert structure 7 is detachably inserted into the cavity of the mounting cylinder. A screw (an example of a fastener) passes through the cylinder wall of the mounting cylinder and is inserted into the mounting slot 15 to achieve a fixed fit between the insert structure 7 and the mounting cylinder. This facilitates the removal of the knob without disassembling the main structure of the electrical appliance, which is beneficial for the individual disassembly and repair of the knob in case of malfunction. Optionally, in other embodiments, a mounting hole 8 can be provided on the base 101, opening onto its negative Z-axis end face. A screw passes through the housing along the positive Z-axis and is threaded into the mounting hole 8, thereby mounting the knob onto the appliance's housing. However, this method of mounting the knob makes disassembly more difficult; therefore, this embodiment preferably uses a screw to connect the wall of the mounting cylinder to the side wall of the insert structure 7. This embodiment also provides mounting slots 15 and mounting holes 8, allowing users to choose the mounting method of the knob and appliance according to their needs or conditions.

[0058] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. Knob, including: First component; The second component is rotatable relative to the first component about a rotation axis; One of the first component and the second component is the stator component of the knob, and the other is the rotor component of the knob; Its characteristic is that it further includes: A flexible magnetic strip is fixed to the second component. The flexible magnetic strip is bent to extend along the rotational circumference of the second component and has multiple pairs of magnetic poles distributed along its extension direction. A magnetic sensor is fixed to the first component and is used to sense the magnetic poles of the flexible magnetic strip.

2. The knob according to claim 1, characterized in that, The second component has a first positioning wall extending along the rotational circumference and facing the rotational axis, and the flexible magnetic strip contacts and engages with the first positioning wall.

3. The knob according to claim 1, characterized in that, The second component has a second positioning wall extending along the circumferential direction of rotation and toward the flexible magnetic strip in the direction of extension along the axis of rotation, and the flexible magnetic strip is in contact with the second positioning wall.

4. The knob according to any one of claims 1 to 3, characterized in that, The flexible magnetic strip is glued to the second component; The flexible magnetic strip is a rubber magnetic strip.

5. The knob according to any one of claims 1 to 3, characterized in that, Each pair of magnetic poles is arranged in an array along the extension direction of the flexible magnetic strip and is adjacent to each other.

6. The knob according to any one of claims 1 to 3, characterized in that, The flexible magnetic strip is bent into an arc shape; Alternatively, the flexible magnetic strip is bent into a circular ring with its ends connected.

7. The knob according to any one of claims 1 to 3, characterized in that, The rotor component includes a cylindrical body and a transparent protective plate. The cylindrical body is sleeved around the outer periphery of the stator component, and the transparent protective plate is sealed to one end of the cylindrical body along the extension direction of the rotation axis. The stator component is fixedly provided with a display component, which faces the transparent protective plate and is located within the space enclosed by the transparent protective plate and the cylinder.

8. The knob according to any one of claims 1 to 3, characterized in that, The flexible magnetic strip is fixed to the rotor component, and the electronic control component of the knob is fixed to the stator component, and is at least partially located radially inside the flexible magnetic strip.

9. An electrical appliance, including a housing, characterized in that, It also includes a knob as described in any one of claims 1 to 8, wherein the stator component is fixed to the housing.

10. The electrical appliance according to claim 9, characterized in that, The stator component has an insert structure that protrudes outward along the extension direction of the rotation axis, and the side wall of the insert structure has a mounting slot. The housing has an outwardly protruding mounting cylinder, and the insert structure is detachably inserted into the cavity of the mounting cylinder. Fasteners are connected to the cylinder wall of the mounting cylinder and inserted into the mounting slot to achieve a fixed fit between the insert structure and the mounting cylinder.

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