A rotary knob switch

Abstract

The utility model belongs to knob technical field discloses a knob switch, including display screen, circuit board, body base, rotary sleeve knob, magnetic ring, base, feedback assembly and outer knob, circuit board is placed in body base, and circuit board is equipped with two interval's hall, the screen cover of display screen is equipped with body base and is connected with circuit board electricity, the magnetic ring is placed in rotary sleeve knob, and the base is clamped and is fixed in panel, body base is placed in rotary sleeve knob rear part and is fixed through rotary sleeve knob with base, rotary sleeve knob can rotate relative to base, feedback assembly is placed in body base back, including elastic part, there is continuous damping part in the outer periphery of center column, and elastic part part is placed in one recess of damping part, and outer knob is connected with rotary sleeve knob and is connected. The knob switch can solve the problem that the existing knob circuit assembly is easy to enter water, the service life is short, the knob cannot be self -locking, when the household appliance is slightly vibrated, the knob is easy to rotate, the customer needs to observe the appliance frequently, and the use experience is poor.

Description

Technical Field

[0001] This utility model relates to the field of knob technology, and in particular to a knob switch. Background Technology

[0002] A knob is a component that is controlled by hand. It can be rotated continuously according to functional requirements, and the rotation angle can reach 360°. Different rotation angles allow you to select different functions of the household appliance. Many household appliances on the market are equipped with knobs, such as induction cookers, gas stoves, and washing machines.

[0003] Existing knobs use an internal potentiometer to change the resistance and thus output different electrical signals. However, water easily accumulates on the panel of existing household appliances, making the internal circuit components of the knob susceptible to water ingress and shortening its lifespan. Furthermore, the knobs lack self-locking; even slight vibrations from user touch can cause the knob to turn without being operated, altering the appliance's function and requiring frequent monitoring, thus impacting the user experience. Utility Model Content

[0004] The purpose of this utility model is to provide a rotary switch that can solve the problems of existing rotary switches being prone to water ingress into circuit components due to water accumulation on the panel of household appliances, resulting in a short service life, the inability of the rotary switch to self-lock, and the fact that the amplitude of slight vibration of household appliances is transmitted to the rotary switch, causing the rotary switch to rotate even when not operated, requiring customers to frequently observe household appliances, thus affecting the customer's user experience.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A rotary switch, mounted on the panel of a household appliance, is used to adjust the functions of the household appliance. The rotary switch includes:

[0007] The system comprises a display screen, a circuit board, and a base. The base includes a first receiving cavity, the circuit board is positioned within the first receiving cavity, and the circuit board has two spaced-apart Hall effect sensors. The display screen covers the opening of the first receiving cavity and is electrically connected to the circuit board. The base includes protruding posts. The circuit board has output cables.

[0008] The rotating sleeve includes a second receiving cavity, the magnetic ring is placed in the second receiving cavity, the rotating sleeve includes a central post with a through hole, the base is snapped and fixed to the panel, the main body base is placed in the second receiving cavity, and the protruding post passes through the through hole and is fixed to the base; the rotating sleeve is rotatable relative to the base.

[0009] The feedback component includes an elastic element, which is placed on the back of the body base. The outer peripheral surface of the central column is provided with a continuous damping portion, which is a continuous wave groove. The elastic element is partially placed in one of the grooves.

[0010] The outer button is a cylindrical shape with openings at the top and bottom, and it is snapped into the outer wall of the rotating sleeve.

[0011] As a preferred technical solution for the rotary switch, the display screen further includes a screen holder, which is fitted into the first receiving cavity and located above the circuit board. The screen holder is used to support the screen. The screen holder includes a first port and a second port. The first port is electrically connected to the screen via a first ribbon cable, and the second port is connected to the circuit board via a second ribbon cable.

[0012] As a preferred technical solution for the rotary switch, the circuit board is provided with a number of LED beads, the screen base includes a number of annular clearance holes, the number of annular clearance holes are located directly above the number of LED beads, the display screen also includes a light guide ring and an ambient light film, the light guide ring is positioned on the screen base and located inside the number of annular clearance holes, and the ambient light film covers the number of annular clearance holes.

[0013] As a preferred technical solution for the rotary switch, the rotary switch further includes a vibration motor, which is electrically connected to the circuit board. When the display screen is touched, the vibration motor can vibrate accordingly.

[0014] As a preferred technical solution for a rotary switch, the circuit board is provided with a slave chip, and the household appliance is provided with a master chip. The slave chip is connected to the master chip via the output cable.

[0015] The circuit board has an integrated output port, and the household appliance has an integrated input port. The integrated output port and the integrated input port are connected by the output cable.

[0016] As a preferred technical solution for a rotary switch, the first receiving cavity is filled with epoxy resin, and the epoxy resin impregnates the circuit board.

[0017] The area where the body base and the screen are attached is filled with adhesive.

[0018] As a preferred technical solution for rotary switches, the outer wall of the outer button is provided with anti-slip grooves.

[0019] As a preferred technical solution for the rotary switch, two feedback components are provided, with the two feedback components located on both sides of the damping part, and portions of the two elastic elements respectively placed in two of the grooves of the damping part;

[0020] The feedback component also includes a fixing member, which is fixed to the bottom surface of the body base. The elastic member is fixedly connected to the fixing member and has a portion exposed. The area of ​​the elastic member exposed to the fixing member is placed in the groove of the damping part.

[0021] As a preferred technical solution for a rotary switch, the base includes a limiting hole, and the central post of the rotary knob is movably positioned within the limiting hole.

[0022] As a preferred technical solution for a rotary switch, the magnetic ring includes multiple fan-shaped annular magnets, with adjacent fan-shaped annular magnets having opposite polarities; the number of grooves in the damping part is the same as the number of fan-shaped annular magnets.

[0023] The beneficial effects of this utility model are:

[0024] The rotary switch provided by this utility model separates the circuit board from the rotary knob by placing the circuit board in the first receiving cavity of the main body base. The circuit board is positioned above the magnetic ring. When water accumulates on the panel, the circuit board is protected in the first receiving cavity, and the water only wets the magnetic ring, so the performance of the circuit board is not affected, thus ensuring the service life of the rotary switch. By setting a feedback component, when the customer rotates the rotary knob, the damping part rotates with it, and the elastic element deforms, which does not affect the adjustment of the rotary switch to the function of the household appliance. When the knob stops rotating, the elastic element inserts into other grooves of the damping part, and the rotary knob is locked. When the household appliance is subjected to slight vibration, even if the amplitude is transmitted to the rotary switch, it will not cause the rotary knob to rotate, avoiding the problem of the rotary switch rotating and changing the function of the household appliance when it is not operated. This eliminates the need for customers to frequently check the current function of the household appliance while using it, improving the customer's user experience. Attached Figure Description

[0025] Figure 1 This is an exploded view of the rotary switch provided by this utility model;

[0026] Figure 2 This is a first-view structural schematic diagram of the rotary switch provided by this utility model;

[0027] Figure 3 This is a schematic diagram of the second-view structure of the rotary switch provided by this utility model;

[0028] Figure 4 This is a first-view cross-sectional schematic diagram of the rotary switch provided by this utility model;

[0029] Figure 5 This is a second-view cross-sectional schematic diagram of the rotary switch provided by this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the rotating sleeve provided by this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the screen holder provided by this utility model.

[0032] In the picture:

[0033] 1. Display screen; 11. Screen; 12. Screen base; 121. Annular clearance hole; 13. Light guide ring; 14. Ambient light diaphragm;

[0034] 2. Circuit board; 21. Hall effect sensor; 22. Output cable; 23. LED chip; 24. Slave chip;

[0035] 3. Body base; 31. First receiving cavity; 32. Protruding column;

[0036] 4. Rotating knob; 41. Second receiving cavity; 42. Central column; 421. Through hole; 422. Damping part;

[0037] 5. Magnetic ring; 51. Sector-shaped ring magnet;

[0038] 6. Base; 61. Limiting hole;

[0039] 7. Feedback component; 71. Elastic component; 72. Fixing component;

[0040] 8. External button; 9. Vibration motor. Detailed Implementation

[0041] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1 to 6 As shown, this utility model provides a rotary switch, mounted on the panel of a household appliance, for adjusting the appliance's functions. The rotary switch includes a display screen 1, a circuit board 2, a base 3, a rotating knob 4, a magnetic ring 5, a base 6, a feedback component 7, and an outer button 8. The base 3 includes a first receiving cavity 31, within which the circuit board 2 is positioned. The circuit board 2 has two spaced Hall effect sensors 21. The screen 11 of the display screen 1 covers the opening of the first receiving cavity 31 and is electrically connected to the circuit board 2. The display screen 1 can display the currently selected function of the household appliance, improving the intelligence and ease of use of the rotary switch. The circuit board 2 has an output cable 22 for electrically connecting the rotary switch to the household appliance and controlling the function selection of the appliance.

[0046] The rotary knob 4 includes a second receiving cavity 41, within which a magnetic ring 5 is placed. The rotary knob 4 also includes a central post 42 with a through hole 421. A base 6 is fixedly attached to the panel. The main body base 3 includes a protruding post 32 located on the bottom surface of the main body base 3. In the rotary switch, the main body base 3 is placed in the second receiving cavity 41, and the protruding post 32 passes through the through hole 421 and is fixed to the base 6. Therefore, the base body is fixed to the base 6, and the circuit board 2, located in the first receiving cavity 31, is in a fixed position. The two Hall effect sensors 21 on the circuit board 2 are also in a fixed position. The rotary knob 4 can rotate relative to the base 6. When the rotary knob 4 rotates, it drives the magnetic ring 5 to rotate. Since the two Hall effect sensors 21 on the circuit board 2 are in fixed positions, when the magnetic ring 5 rotates, the Hall effect sensors 21 can detect changes in the magnetic field. The Hall effect sensors 21 will then send an electrical signal to the circuit board 2, which is transmitted to the household appliance via the output cable 22, thus regulating the appliance's function. Meanwhile, two Hall effect sensors 21 are set on the circuit board 2. By judging the phase difference between the two Hall effect sensors 21, the rotation direction of the rotary knob 4 can be determined, so that the rotary switch can adjust the functions of household appliances more accurately.

[0047] Circuit board 2 is placed in the first receiving cavity 31 of the main body base 3. Circuit board 2 and rotary knob 4 are separately arranged. The main body base 3 is placed in the second receiving cavity 41. In the height direction, the main body base 3 is located above the rotary knob 4, and the magnetic ring 5 is located inside the rotary knob 4. It can be seen that in the height direction, circuit board 2 is located above magnetic ring 5. When water accumulates on the panel of the household appliance, circuit board 2 is protected in the first receiving cavity 31. The water can only wet the magnetic ring 5, and the performance of circuit board 2 will not be affected, thus ensuring the service life of the rotary switch. At the same time, since the display screen 1 is electrically connected to circuit board 2, circuit board 2 will also send an electrical signal to display screen 1, and display screen 1 will display the currently selected function of the household appliance accordingly.

[0048] The feedback component 7 includes an elastic element 71, which is located on the back of the main body base 3 and is fixed in position. The outer circumferential surface of the central column 42 is provided with a continuous damping part 422, wherein the damping part 422 is a continuous wave groove, and part of the elastic element 71 is placed in one of the grooves of the damping part 422. When the customer rotates the rotary knob 4 to adjust the function of the home appliance, the damping part 422 will rotate with the rotary knob 4, and the elastic element 71 will deform without affecting the customer's adjustment of the function of the home appliance. When the customer selects the function and the rotary knob 4 stops rotating, the elastic element 71 is inserted into the other grooves of the damping part 422, so that the rotary knob 4 is locked. When the home appliance is subjected to slight vibration, the amplitude generated will not cause the rotary knob 4 to rotate even if it is transmitted to the rotary switch, thus avoiding the problem of the rotary switch rotating and changing the function of the home appliance without being operated. This eliminates the need for the customer to frequently observe the current function of the home appliance while using it, thereby improving the customer's user experience.

[0049] The outer button 8 is a cylindrical shape with openings at the top and bottom. It snaps into the outer wall of the rotary knob 4, allowing the customer to rotate the knob 4. This not only improves the aesthetics of the rotary switch but also makes it easier for the customer to operate. Specifically, the outer wall of the rotary knob 4 has an L-shaped groove, and the inner wall of the outer button 8 has a protrusion. During assembly, the worker places the protrusion into the L-shaped groove and then rotates the outer button 8, causing the protrusion to fully engage with the L-shaped groove, thus completing the snap-fit ​​connection between the outer button 8 and the rotary knob 4. Alternatively, the outer button 8 can be glued to the rotary knob 4; this is not a specific limitation. In this embodiment, the outer button 8 is made of metal, further improving the lifespan and aesthetics of the rotary switch.

[0050] The terms "upper" and "lower" are based on the orientation or positional relationship shown in the attached drawings, and do not mean that the device or component must have a specific orientation or be constructed and operated in a specific orientation.

[0051] The rotary switch provided in this embodiment separates the circuit board 2 from the rotary knob 4 by placing the circuit board 2 in the first receiving cavity 31 of the main body base 3. The circuit board 2 is positioned above the magnetic ring 5. When water accumulates on the panel, the circuit board 2 is protected within the first receiving cavity 31, and the water only wets the magnetic ring 5. The performance of the circuit board 2 is not affected, thus ensuring the service life of the rotary switch. By setting the feedback component 7, when the customer rotates the rotary knob 4, the damping part 422 rotates along with it, and the elastic element 71 deforms, without affecting the adjustment of the function of the household appliance by the rotary switch. When the knob stops rotating, the elastic element 71 inserts into other grooves of the damping part 422, and the rotary knob 4 is locked. When the household appliance is subjected to slight vibration, even if the amplitude is transmitted to the rotary switch, it will not cause the rotary knob 4 to rotate, avoiding the problem of the rotary switch rotating and changing the function of the household appliance when it is not operated. This eliminates the need for the customer to frequently observe the current function of the household appliance while using it, improving the customer's user experience.

[0052] Among them, two positioning slots are provided in the first receiving cavity 31 of the main body base 3. When assembling the circuit board 2, the two Hall 21s on the circuit board 2 are placed in the two positioning slots respectively, so that the circuit board 2 can be positioned and installed in the first receiving cavity 31, thereby improving the efficiency and accuracy of the workers in assembling the circuit board 2.

[0053] In this embodiment, a positioning hole is provided on the base 6, and a fixing hole is provided on the main body base 3. The fixing hole is opposite to the positioning hole. After the bolt passes through the positioning hole, it is threaded into the fixing hole to achieve a fixed connection between the main body base 3 and the base 6. Of course, the main body base 3 can also be fixed to the base 6 in other ways, such as by mutual bonding. No specific restrictions are made on the connection method between the base 6 and the main body base 3.

[0054] In this embodiment, the rotary switch also includes a screen holder 12, which is fitted into the first receiving cavity 31 and located above the circuit board 2. The screen holder 12 supports the display screen 1. The screen holder 12 includes a first port and a second port. The first port is connected to the display screen 1 via a first ribbon cable, and the second port is connected to the circuit board 2 via a second ribbon cable. The modular design of the display screen 1 and the screen holder 12 not only allows for rapid assembly, but also simplifies the display mode change. For example, when changing the display mode of the display screen 1 from a single-screen mode to a multi-screen mode, only the type of screen holder 12 needs to be changed to complete the mode change, without requiring significant structural alterations to the rotary switch, thus improving the rationality of the rotary switch design. The first and second ports facilitate the circuit connection between the display screen 1, the screen holder 12, and the circuit board 2, improving the assembly efficiency of the rotary switch. They also result in a cleaner internal wiring layout and safer operation. The specific structure and working principle of the screen holder 12 can be found in existing technology and will not be elaborated upon here.

[0055] In this embodiment, as Figure 1 and Figure 7 As shown, multiple LED beads 23 are arranged in a ring around the circuit board 2. The screen base 12 includes multiple annular clearance holes 121 located directly above the LED beads 23, allowing the light emitted by the LED beads 23 to illuminate the display screen 1. The rotary switch also includes a light guide ring 13 and an ambient light film 14. The light guide ring 13 is mounted to the screen base 12 and located inside the multiple annular clearance holes 121, while the ambient light film 14 covers the multiple annular clearance holes 121. The light guide ring 13 transforms the point light source of the multiple LED beads 23 into a uniform surface light source, making the display on the display screen 1 more uniform and improving its display effect. By setting the ambient light film 14, which supports color adjustment, different light colors can be emitted when the user rotates the rotary switch, further enhancing the user experience.

[0056] In this embodiment, the rotary switch also includes a vibration motor 9, which is connected to the circuit board 2. When the display screen 1 is touched, the vibration motor 9 vibrates accordingly. By setting the vibration motor 9, the customer can receive direct feedback when touching the display screen 1, enhancing the customer's sense of confirmation and further improving the customer's user experience of the home appliance. The vibration motor 9 is a conventional component, and its specific structure and working principle can be found in existing technology, which will not be elaborated upon here.

[0057] In this embodiment, a slave chip 24 is provided on the circuit board 2, and a master chip is provided on the household appliance. The slave chip 24 is connected to the master chip via an output cable 22. Thus, the slave chip 24 on the circuit board 2 can process the signal output by the Hall effect sensor 21, and then transmit the processed signal to the master chip via the output cable 22. The master chip sends instructions to the slave chip 24, and the display screen 1 displays the command. By setting the slave chip 24, the processing of the Hall effect sensor output signal by the master chip is eliminated, simplifying the control program of the master chip. When using a rotary switch to adjust the functions of the household appliance, the response of the household appliance is faster, further improving the user experience.

[0058] Furthermore, circuit board 2 is equipped with an integrated output port, and the household appliance is equipped with an integrated input port. The integrated output port and the integrated input port are connected by an output cable 22. This integrates and simplifies the connection circuit between the rotary switch and the household appliance, enabling rapid assembly of the rotary switch and the household appliance, and further improving the rationality of the rotary switch design. The output cable 22 includes multiple two-prong connectors connected to each other by multiple wires. One connector plugs into the integrated output port on circuit board 2, and the other connector plugs into the integrated input port on the household appliance. The multiple wires are used to transmit electrical signals between circuit board 2 and the household appliance.

[0059] In this embodiment, the first receiving cavity 31 is filled with epoxy resin, and the epoxy resin immerses the circuit board 2. This improves the water resistance of the circuit board 2, enabling the rotary switch to withstand an IP67 dust and water resistance rating, thus extending the service life of the rotary switch. Furthermore, adhesive is filled in the bonding area between the body base 3 and the screen 11 to further prevent dust and moisture from entering the rotary switch, thereby further extending the service life of the rotary switch.

[0060] In this embodiment, the outer wall of the outer button 8 is provided with anti-slip grooves. When the customer rotates the knob switch, it can increase the friction between the finger and the outer button 8, making the customer's operation more stable. At the same time, the anti-slip grooves can also improve the aesthetics of the knob switch.

[0061] The device includes two feedback components 7, located on either side of the damping section 422. Specifically, based on a straight line containing one of the diameters of the central column 42, the two feedback components 7 are positioned on either side of this diameter. This allows the two feedback components 7 to limit the rotation amplitude of the rotary switch from both sides, preventing significant shaking of the switch when turned by the user. Simultaneously, the two feedback components 7 further enhance the self-locking capability of the rotary switch, reducing the risk of the switch rotating without being operated, and further improving the safety of the rotary switch.

[0062] For example, the feedback component 7 further includes a fixing member 72, which is fixed to the bottom surface of the main body base 3. The elastic member 71 is fixedly connected to the fixing member 72 and partially exposed. The area of ​​the elastic member 71 exposed to the fixing member 72 is placed in the groove of the damping part 422, thereby locking the rotary switch when the customer does not operate it. The fixing member 72 makes the fixing of the elastic member 71 more stable, thus achieving a more stable locking of the rotary switch. The fixing member 72 can be fixed to the main body base 3 by adhesive or by snap-fit. The connection method between the fixing member 72 and the main body base 3 is not specifically limited here. In this embodiment, the elastic member 71 can be a strip-shaped spring sheet with a protrusion bent in the middle area, which is placed in the groove of the damping part 422.

[0063] In this embodiment, the base 6 includes a limiting hole 61. The central post 42 of the rotary knob 4 is movably placed within the limiting hole 61. When the rotary knob 4 is rotated, the limiting hole 61 can limit the wobbling amplitude of the rotary knob 4 during rotation, making the rotary switch rotate more smoothly when the customer rotates it. The protruding post 32 on the main body base 3 passes through the through hole 421 of the rotary knob 4 and is fixed to the base 6. When the rotary knob 4 rotates, the protruding post 32 and the limiting hole 61 can doubly limit the rotational deviation amplitude of the rotary knob 4, improving the stability of the rotary switch during rotation and enhancing the customer's operating experience.

[0064] In this embodiment, the magnetic ring 5 includes fan-shaped annular magnets 51, with multiple fan-shaped annular magnets 51 arranged sequentially to form a circular magnetic ring 5, and there are no gaps between the multiple fan-shaped annular magnets 51. Adjacent fan-shaped annular magnets 51 have opposite polarities, so that when the rotary knob 4 rotates, causing the magnetic ring 5 to rotate, the Hall effect sensor 21 can detect changes in the magnetic field and adjust the function of the home appliance. The number of grooves in the damping part 422 is the same as the number of fan-shaped annular magnets 51. When the customer rotates the knob switch, each time the customer hears a feedback sound from the feedback component 7, it indicates that a function has been adjusted, improving the accuracy of the customer's adjustment of the home appliance function.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotary switch, mounted on the panel of a household appliance, for adjusting the function of the household appliance, characterized in that, The rotary switch includes: The device comprises a display screen (1), a circuit board (2), and a base (3). The base (3) includes a first receiving cavity (31). The circuit board (2) is positioned within the first receiving cavity (31). The circuit board (2) has two spaced Hall effect sensors (21). The screen (11) of the display screen (1) covers the opening of the first receiving cavity (31) and is electrically connected to the circuit board (2). The base (3) includes protruding posts (32). The circuit board (2) has an output cable (22). The rotating sleeve (4), magnetic ring (5), and base (6) are provided. The rotating sleeve (4) includes a second receiving cavity (41), and the magnetic ring (5) is placed in the second receiving cavity (41). The rotating sleeve (4) includes a central post (42) with a through hole (421). The base (6) is snapped and fixed to the panel. The main body base (3) is placed in the second receiving cavity (41). The protruding post (32) passes through the through hole (421) and is fixed to the base (6). The rotating sleeve (4) is rotatable relative to the base (6). Feedback component (7) includes an elastic element (71) which is placed on the back of the body base (3). The outer peripheral surface of the central column (42) is provided with a continuous damping part (422), which is a continuous wave groove. The elastic element (71) is partially placed in one of the grooves. The outer button (8) is a cylindrical shape with openings at the top and bottom, and the outer button (8) is snapped into the outer wall of the rotating sleeve (4).

2. The rotary switch according to claim 1, characterized in that, The display screen (1) further includes a screen holder (12), which is mounted in the first receiving cavity (31) and located above the circuit board (2). The screen holder (12) is used to support the screen (11). The screen holder (12) includes a first port and a second port. The first port is electrically connected to the screen (11) through a first ribbon cable, and the second port is connected to the circuit board (2) through a second ribbon cable.

3. The rotary switch according to claim 2, characterized in that, The circuit board (2) is provided with a plurality of LED beads (23), the screen base (12) includes a plurality of annular clearance holes (121), the plurality of annular clearance holes (121) are located directly above the plurality of LED beads (23), the display screen (1) also includes a light guide ring (13) and an ambient light film (14), the light guide ring (13) is positioned on the screen base (12) and is located inside the plurality of annular clearance holes (121), and the ambient light film (14) covers the plurality of annular clearance holes (121).

4. The rotary switch according to claim 1, characterized in that, The rotary switch also includes a vibration motor (9), which is electrically connected to the circuit board (2). When the display screen (1) is touched, the vibration motor (9) can vibrate accordingly.

5. The rotary switch according to claim 1, characterized in that, The circuit board (2) is provided with a slave chip (24), and the household appliance is provided with a master chip. The slave chip (24) is connected to the master chip via the output cable (22). The circuit board (2) is provided with an integrated output port, and the household appliance is provided with an integrated input port. The integrated output port and the integrated input port are connected by the output cable (22).

6. The rotary switch according to claim 1, characterized in that, The first receiving cavity (31) is filled with epoxy resin adhesive, and the epoxy resin adhesive immerses the circuit board (2); The area where the body base (3) and the screen (11) are attached is filled with adhesive.

7. The rotary switch according to claim 1, characterized in that, The outer wall of the outer button (8) is provided with anti-slip grooves.

8. The rotary switch according to claim 1, characterized in that, The feedback component (7) is provided in two parts, and the two feedback components (7) are respectively located on both sides of the damping part (422), and the portions of the two elastic elements (71) are respectively placed in two of the grooves of the damping part (422); The feedback component (7) further includes a fixing member (72), which is fixed to the bottom surface of the body base (3). The elastic member (71) is fixedly connected to the fixing member (72) and a portion of it is exposed. The area of ​​the elastic member (71) exposed to the fixing member (72) is placed in the groove of the damping part (422).

9. The rotary switch according to claim 1, characterized in that, The base (6) includes a limiting hole (61), and the central column (42) of the rotating sleeve (4) is movably placed in the limiting hole (61).

10. The rotary switch according to claim 1, characterized in that, The magnetic ring (5) includes a plurality of fan-shaped annular magnets (51), with adjacent fan-shaped annular magnets (51) having opposite polarities; the number of grooves in the damping part (422) is the same as the number of fan-shaped annular magnets (51).

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