Knob assembly and cooking utensil

Abstract

The utility model relates to a knob assembly and a cooking utensil. The knob assembly comprises a panel, a rotary switch, an insulating shaft sleeve and a knob, the rotary switch is arranged on the inner side of the panel and provided with a rotary control shaft, the rotary knob is arranged on the outer side of the panel, the insulation shaft sleeve is arranged on the rotary control shaft in a sleeving mode and connected with the rotary control shaft in a circumferential limiting mode, the insulation shaft sleeve penetrates through the panel, and one end of the insulation shaft sleeve extends into the inner side of the panel and is provided with a limiting rib. And the other end of the insulating shaft sleeve is in circumferential limiting connection with the knob. According to the rotary knob, the insulation shaft sleeve is arranged, the insulation shaft sleeve is arranged on the rotation control shaft in a sleeving mode, the limiting ribs located on the inner side of the panel are arranged, and the limiting ribs can prevent the insulation shaft sleeve from falling off, so that when the rotary knob falls off, the insulation shaft sleeve can still be arranged on the outer side of the rotation control shaft in a sleeving mode. As the insulating shaft sleeve is insulated, a user can be prevented from contacting a metal part of the rotary switch, and the problem that the rotary switch has an electric shock safety risk after the knob falls off is solved.

Description

Technical Field

[0001] This application relates to the field of small household appliance technology, and in particular to a knob assembly and a cooking appliance. Background Technology

[0002] Air fryers, ovens, egg cookers, and other cooking appliances often use rotary switches, such as timers. These rotary switches are typically used in conjunction with knobs. The rotary switch is mounted on the inside of the control panel, which has an opening for the rotary switch's control shaft to extend from. The knob has a pivot hole for mounting the control shaft, and the two are fitted together with an interference fit. Over time, the knob is prone to cracking, potentially causing it to detach. Since the rotary switch's control shaft is a metal component, a detached knob poses a risk of electric shock. Utility Model Content

[0003] Therefore, it is necessary to provide a knob assembly and cooking appliance that can avoid the risk of electric shock from rotating the switch after the knob falls off.

[0004] This application provides a knob assembly, including: a panel, a rotary switch, an insulating sleeve, and a knob; the rotary switch is disposed inside the panel and has a rotation control shaft; the knob is disposed outside the panel; the insulating sleeve is sleeved on the rotation control shaft and is circumferentially limited and connected to the rotation control shaft; the insulating sleeve passes through the panel, one end of the insulating sleeve extends into the inside of the panel, and the end is provided with a limiting rib; the limiting rib is axially limited and engaged with the panel along the insulating sleeve; the other end of the insulating sleeve is circumferentially limited and connected to the knob.

[0005] The knob assembly provided in this application features an insulating sleeve fitted onto the rotary control shaft. A limiting rib located inside the panel prevents the insulating sleeve from detaching, ensuring that even if the knob falls off, the insulating sleeve remains on the outside of the rotary control shaft. Because the insulating sleeve provides insulation, it prevents the user from contacting the metal parts of the rotary switch, thus solving the problem of electric shock risk posed by a detached knob.

[0006] In one embodiment, the limiting rib is annular and extends radially along the insulating bushing, the panel has a mounting hole through which the insulating bushing passes, the portion of the insulating bushing between the limiting rib and the knob can pass through the mounting hole, and the limiting rib cannot pass through the mounting hole.

[0007] Thus, during installation, the insulating bushing can be installed from the inside of the panel to the outside. After the insulating bushing is passed through the mounting hole, the limiting rib can prevent the insulating bushing from falling off from the outside of the panel.

[0008] In one embodiment, the knob is provided with a mounting groove, and one end of the insulating bushing is connected to the mounting groove.

[0009] Thus, by setting the mounting groove, the connection between the knob and the insulating bushing can be made more secure.

[0010] In one embodiment, the cross-section of the assembly groove is non-circular, and the shape of the insulating bushing connected to one end of the assembly groove is adapted to the shape of the assembly groove.

[0011] In this way, circumferential positioning can be achieved by inserting one end of the insulating bushing into the assembly groove, so that the insulating bushing also rotates when the knob is rotated.

[0012] In one embodiment, the limiting rib is a protrusion on a portion of the circumference of the insulating bushing. The panel has a mounting hole through which the insulating bushing passes. One end of the insulating bushing with the limiting rib can pass through the mounting hole. After the insulating bushing and the rotary switch are assembled on the panel, the insulating bushing and the mounting hole are coaxially arranged. The inner diameter of the mounting hole is D. The maximum distance between the outer wall of the limiting rib and the central axis of the insulating bushing is L, where L > D / 2.

[0013] Thus, during installation, the insulating bushing can be installed from the inside of the panel to the outside. After passing the insulating bushing through the mounting hole, the position of the insulating bushing is adjusted so that the insulating bushing and the mounting hole are coaxial. The limiting rib can then prevent the insulating bushing from falling off the outside of the panel.

[0014] In one embodiment, a baffle is provided at one end of the insulating bushing away from the limiting rib, the maximum outer diameter of the baffle being larger than the inner diameter of the mounting hole; a positioning groove is provided on the baffle, and a positioning rib is provided on the inner side of the knob, the shape of the positioning rib being adapted to the positioning groove, and the positioning rib and the positioning groove cooperating to limit the knob and the insulating bushing circumferentially.

[0015] Thus, the insulating bushing can only be installed from the outside of the panel inwards. The positioning ribs and positioning grooves work together to achieve quick positioning of the baffle and knob connection, and the insulating bushing can be rotated together with the knob when it is turned.

[0016] In one embodiment, the insulating bushing and the knob are fixedly connected by a snap-fit ​​structure or by fasteners.

[0017] In this way, the knob and the insulating bushing are securely connected.

[0018] In one embodiment, the insulating bushing has a bushing hole, and the insulating bushing is fitted onto the rotation control shaft through the bushing hole. The bushing hole is a non-circular hole, and the shape of the rotation control shaft is adapted to the shape of the bushing hole.

[0019] In this way, the circumferential positioning of the positioning control shaft and the insulating bushing can be achieved by extending the rotary control shaft into the bushing hole. Thus, the rotation of the insulating bushing can drive the rotary control shaft to rotate. The structure is very simple and easy to process.

[0020] In one embodiment, there is an assembly clearance between the rotation control shaft and the inner wall of the bushing hole.

[0021] This avoids an interference fit between the rotary control shaft and the insulating bushing, ensuring that the insulating bushing will not crack due to the interference fit.

[0022] In one embodiment, the rotary switch is a timer, encoder, gear switch, or thermostat.

[0023] Thus, this rotary switch can be applied to a variety of scenarios.

[0024] This application provides a cooking appliance, including the aforementioned knob assembly.

[0025] By incorporating the aforementioned knob assembly, this cooking appliance avoids the risk of electric shock posed by rotating the switch after the knob has come loose. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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.

[0027] Figure 1 This is a cross-sectional view of a knob assembly according to an embodiment of this application;

[0028] Figure 2 for Figure 1 An exploded view of the knob assembly shown;

[0029] Figure 3 for Figure 1 An exploded view of the knob assembly shown from another perspective;

[0030] Figure 4 This is an exploded view of a knob assembly according to another embodiment of this application;

[0031] Figure 5 for Figure 4 A schematic diagram of the knob and insulating bushing from another perspective;

[0032] Figure 6 for Figure 5 The diagram shows the assembly of the knob and the insulating bushing.

[0033] Reference numerals: 10, panel; 11, mounting hole; 12, connecting through hole; 20, rotary switch; 21, rotary control shaft; 22, connecting hole; 30, insulating bushing; 31, limiting rib; 32, snap-fit; 33, baffle; 331, positioning groove; 34, bushing hole; 40, knob; 41, assembly groove; 411, snap hole; 42, protruding buckle; 43, positioning rib. Detailed Implementation

[0034] 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.

[0035] 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 the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0036] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0039] Please see Figures 1 to 3 This application provides a knob assembly, including: a panel 10, a rotary switch 20, an insulating sleeve 30, and a knob 40. The rotary switch 20 is located inside the panel 10 and has a rotation control shaft 21. The knob 40 is located outside the panel 10. The insulating sleeve 30 is sleeved on the rotation control shaft 21 and is circumferentially limited to it. The insulating sleeve 30 passes through the panel 10, with one end extending into the inside of the panel 10 and having a limiting rib 31 at that end. The limiting rib 31 is axially limited to the panel 10, and the other end of the insulating sleeve 30 is circumferentially limited to the knob 40. It is worth mentioning that "circumferentially limited connection" means that the two components are limited in the circumferential direction, i.e., they cannot rotate relative to each other. "Axial limited fit" means that the two components are limited in the axial direction, i.e., they cannot move along the axial direction. Thus, rotating the knob 40 can drive the insulating sleeve 30, which in turn drives the rotation control shaft 21 to rotate, thereby realizing rotational operation control. When the knob 40 falls off, the insulating sleeve 30, fitted onto the rotary control shaft 21 and equipped with a limiting rib 31 located inside the panel 10, prevents the insulating sleeve 30 from falling off. Therefore, even when the knob 40 falls off, the insulating sleeve 30 remains fitted onto the outside of the rotary control shaft 21. Because the insulating sleeve 30 is insulating, it prevents the user from contacting the metal parts of the rotary switch 20, thus solving the problem of electric shock risk to the rotary switch 20 after the knob 40 falls off.

[0040] Furthermore, the insulating bushing 30 is connected to the inside of the knob 40, and the part of the insulating bushing 30 located on the outside of the panel 10 is covered by the knob 40. Thus, the insulating bushing 30 is not an external part, and its material selection has a wider range of options. High-strength plastics such as PC, PPS, and ABS can be used. This application does not impose any restrictions on this.

[0041] Understandably, there is a gap between the knob 40 and the panel 10, so as to prevent the outer wall of the panel 10 from affecting the rotation of the knob 40.

[0042] The panel 10 is provided with a mounting hole 11 for the insulating bushing 30 to pass through, so that the insulating bushing 30 can be connected to the knob 40 and the rotary switch 20 respectively after passing through the mounting hole 11.

[0043] like Figures 1 to 3As shown, in one embodiment, the limiting rib 31 is annular and extends radially along the insulating sleeve 30. The portion of the insulating sleeve 30 between the limiting rib 31 and the knob 40 can pass through the mounting hole 11, while the limiting rib 31 cannot pass through the mounting hole 11. Thus, during installation, the insulating sleeve 30 can be installed from the inside to the outside of the panel 10. After the insulating sleeve 30 passes through the mounting hole 11, the limiting rib 31 can prevent the insulating sleeve 30 from falling off from the outside of the panel 10. In the knob assembly provided in this embodiment, the insulating sleeve 30 can first be fitted onto the rotation control shaft 21 of the rotary switch 20, then the insulating sleeve 30 can be passed through the mounting hole 11, so that the end of the insulating sleeve 30 away from the rotary switch 20 extends out of the outside of the panel 10. Then, the rotary switch 20 is fixedly connected to the panel 10, and finally the knob 40 is installed on the insulating sleeve 30, thus completing the assembly of the knob assembly.

[0044] In this embodiment, the maximum outer diameter of the portion of the insulating bushing 30 between the limiting rib 31 and the knob 40 is smaller than the inner diameter of the mounting hole 11, and the maximum outer diameter of the limiting rib 31 is larger than the inner diameter of the mounting hole 11. This ensures that the portion of the insulating bushing 30 between the limiting rib 31 and the knob 40 can pass through the mounting hole 11, while the limiting rib 31 cannot pass through the mounting hole 11.

[0045] It is understood that the rotary switch 20 and the panel 10 can be fixedly connected by screws. The panel 10 has a connecting through hole 12, and the rotary switch 20 has a connecting hole 22. The screw passes through the connecting through hole 12 from the outside of the panel 10 and connects with the connecting hole 22, thereby fixing the rotary switch 20 to the panel 10. Of course, the rotary switch 20 can also be fixedly connected to the panel 10 in other ways, and this application does not limit this.

[0046] Furthermore, the knob 40 is provided with a mounting groove 41, and one end of the insulating bushing 30 is connected to the mounting groove 41. In this way, by providing the mounting groove 41, the connection between the knob 40 and the insulating bushing 30 can be made more secure.

[0047] Furthermore, the cross-section of the assembly groove 41 is non-circular, and the shape of the insulating bushing 30 connected to one end of the assembly groove 41 is adapted to the shape of the assembly groove 41. Thus, circumferential limiting can be achieved by one end of the insulating bushing 30 extending into the assembly groove 41, so that the insulating bushing 30 rotates when the knob 40 rotates. In this embodiment, the cross-section of the assembly groove 41 can be square, D-shaped, or elliptical, etc., and this application does not impose any limitations on this.

[0048] Furthermore, the insulating bushing 30 and the knob 40 are fixedly connected by a snap-fit ​​structure, making the connection easy and secure. In this embodiment, the inner wall of the assembly groove 41 is provided with a snap hole 411, and the end of the insulating bushing 30 away from the limiting rib 31 is provided with a snap 32. The snap 32 cooperates with the snap hole 411, thereby allowing the insulating bushing 30 to be snapped into the assembly groove 41. Of course, the positions of the snap hole 411 and the snap 32 can also be reversed, that is, the inner wall of the assembly groove 41 is provided with a snap 32, and the side wall of the insulating bushing 30 is provided with a snap hole 411. When the insulating bushing 30 extends into the assembly groove 41, the snap 32 and the snap hole 411 can also be used to install the insulating bushing 30 into the assembly groove 41.

[0049] Furthermore, the insulating bushing 30 and the knob 40 can also be fixedly connected by fasteners (such as screws). Specifically, a first threaded hole can be provided through the end face of the knob 40, and a second threaded hole can be provided on the end face of the insulating bushing 30. The insulating bushing 30 and the knob 40 can be connected together by connecting the screw to the first threaded hole and the second threaded hole in sequence. Further, an end cap can also be provided on the end face of the knob 40 to cover the screw, thereby maintaining the aesthetic appearance of the knob 40.

[0050] Please see Figures 4 to 6 In another embodiment, the limiting rib 31 is a protrusion on a portion of the circumference of the insulating bushing 30. One end of the insulating bushing 30 with the limiting rib 31 can pass through the mounting hole 11. After the insulating bushing 30 and the rotary switch 20 are assembled on the panel 10, the insulating bushing 30 and the mounting hole 11 are coaxially arranged. The inner diameter of the mounting hole 11 is D, and the maximum distance between the outer wall of the limiting rib 31 and the central axis of the insulating bushing 30 is L, where L > D / 2. Thus, during installation, the insulating bushing 30 can be installed from the inside to the outside of the panel 10. After the insulating bushing 30 passes through the mounting hole 11, the position of the insulating bushing 30 is adjusted so that the insulating bushing 30 and the mounting hole 11 are coaxial, and the limiting rib 31 can prevent the insulating bushing 30 from falling off the outside of the panel 10. In this embodiment, the knob assembly can be assembled by first passing the insulating sleeve 30 through the mounting hole 11, then placing the insulating sleeve 30 onto the rotation control shaft 21 of the rotary switch 20, adjusting the positions of the rotary switch 20 and the insulating sleeve 30 so that the insulating sleeve 30 and the mounting hole 11 are coaxial, and then fixing the rotary switch 20 to the panel 10. The knob 40 can be connected to the insulating sleeve 30 before passing it through the mounting hole 11, or it can be installed on the insulating sleeve 30 after the rotary switch 20 is fixedly connected to the panel 10; this application does not limit this.

[0051] In this embodiment, the maximum dimension between the outer wall of the limiting rib 31 and the outer wall of the insulating bushing 30 in the radial direction is L1, where L1≤D. This ensures that the end of the insulating bushing 30 with the limiting rib 31 can pass through the mounting hole 11, so that the insulating bushing 30 can be installed from the front side of the panel 10.

[0052] Please see Figures 4 to 6 Furthermore, the insulating bushing 30 has a baffle 33 at the end away from the limiting rib 31, and the maximum outer diameter of the baffle 33 is larger than the inner diameter of the mounting hole 11. Thus, the insulating bushing 30 can only be installed from the outside to the inside of the panel 10.

[0053] Furthermore, the baffle 33 is provided with a positioning groove 331, and the inner side of the knob 40 is provided with a positioning rib 43. The shape of the positioning rib 43 is adapted to the positioning groove 331. The positioning rib 43 and the positioning groove 331 cooperate to limit the circumferential positioning of the knob 40 and the insulating bushing 30. In this way, the quick positioning of the connection between the baffle 33 and the knob 40 can be achieved through the cooperation of the positioning rib 43 and the positioning groove 331, and the knob 40 can rotate together with the insulating bushing 30 when it rotates. In this embodiment, during assembly, the insulating bushing 30 can first be passed through the panel 10, then the insulating bushing 30 can be placed on the rotation control shaft 21 of the rotary switch 20, then the rotary switch 20 and the panel 10 can be connected, and finally the knob 40 can be installed on the end of the insulating bushing 30.

[0054] In this embodiment, a protruding buckle 42 is also provided on the inner side of the knob 40. The protruding buckle 42 stops on the side of the baffle 33 facing the limiting rib 31. In this way, the protruding buckle 42 axially limits the baffle 33, making the knob 40 and the insulating bushing 30 firmly connected. This embodiment also achieves the fixed connection between the insulating bushing 30 and the knob 40 through a snap-fit ​​structure (the structure of the protruding buckle 42 and the baffle 33), but it is not limited to this. The knob 40 and the insulating bushing 30 can also be fixedly connected by fasteners. This application does not limit this.

[0055] Please see Figures 1 to 3 Furthermore, the insulating bushing 30 is provided with a bushing hole 34. The insulating bushing 30 is fitted onto the rotary control shaft 21 through the bushing hole 34. The bushing hole 34 is a non-circular hole, and the shape of the rotary control shaft 21 is adapted to the shape of the bushing hole 34. In this way, the rotary control shaft 21 can be inserted into the bushing hole 34 to achieve circumferential positioning of the rotary control shaft 21 and the insulating bushing 30. Thus, the rotation of the insulating bushing 30 can drive the rotary control shaft 21 to rotate. The structure is very simple and easy to manufacture. In this embodiment, the bushing hole 34 can be a square hole, a D-shaped hole, or an elliptical hole, etc., and this application does not limit it in this way.

[0056] Furthermore, there is an assembly clearance between the rotary control shaft 21 and the inner wall of the bushing hole 34. This avoids an interference fit between the rotary control shaft 21 and the insulating bushing 30, ensuring that the insulating bushing 30 will not crack due to an interference fit. Furthermore, the assembly clearance between the rotary control shaft 21 and the inner wall of the bushing hole 34 can be 0.1mm to 0.2mm, ensuring that the rotary control shaft 21 and the insulating bushing 30 do not have an interference fit, while also preventing loosening at the joint.

[0057] The rotary switch 20 can be applied to various scenarios. In one embodiment, the rotary switch 20 can be a timer, encoder, gear switch, or thermostat. The timer is mainly used to measure time and generate precise timing control signals, and is widely used in scenarios requiring precise time control, such as air fryers, ovens, microwave ovens, and egg cookers. The encoder is mainly used to measure mechanical rotation or displacement, converting mechanical motion into electrical signals. It is typically used in scenarios requiring precise position and speed control, and can also be used to achieve timing control. The gear switch achieves different gear levels by rotating the rotary control shaft 21. The thermostat achieves different temperature controls by rotating the rotary control shaft 21. This application does not limit this, as long as the rotary switch 20 can achieve rotary operation control.

[0058] Furthermore, this application also provides a cooking appliance including a knob assembly as described in any of the above embodiments. By incorporating the aforementioned knob assembly, this cooking appliance can avoid the risk of electric shock when the switch 20 is rotated after the knob 40 falls off. This cooking appliance can be an electric slow cooker, electric steamer, oven, air fryer, microwave oven, egg cooker, grill, etc., and this application does not limit its application to such products.

[0059] 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.

[0060] 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 scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A knob assembly, characterized in that, include: The panel (10), rotary switch (20), insulating bushing (30), and knob (40) are provided; the rotary switch (20) is located inside the panel (10) and has a rotation control shaft (21); the knob (40) is located outside the panel (10); the insulating bushing (30) is fitted onto the rotation control shaft (21) and is circumferentially limited and connected to the rotation control shaft (21). The insulating bushing (30) passes through the panel (10). One end of the insulating bushing (30) extends into the inner side of the panel (10), and the end is provided with a limiting rib (31). The limiting rib (31) and the panel (10) are limited and matched along the axial direction of the insulating bushing (30). The other end of the insulating bushing (30) is circumferentially limited and connected to the knob (40).

2. The knob assembly according to claim 1, characterized in that, The limiting rib (31) is annular and extends radially along the insulating bushing (30). The panel (10) is provided with a mounting hole (11) through which the insulating bushing (30) passes. The portion of the insulating bushing (30) between the limiting rib (31) and the knob (40) can pass through the mounting hole (11), while the limiting rib (31) cannot pass through the mounting hole (11).

3. The knob assembly according to claim 2, characterized in that, The knob (40) is provided with a mounting groove (41), and one end of the insulating bushing (30) is connected to the mounting groove (41).

4. The knob assembly according to claim 3, characterized in that, The cross-section of the assembly groove (41) is non-circular, and the shape of the insulating bushing (30) connected to one end of the assembly groove (41) is adapted to the shape of the assembly groove (41).

5. The knob assembly according to claim 1, characterized in that, The limiting rib (31) is a protrusion that protrudes from a portion of the circumference of the insulating bushing (30). The panel (10) is provided with a mounting hole (11) through which the insulating bushing (30) passes. One end of the insulating bushing (30) with the limiting rib (31) can pass through the mounting hole (11). After the insulating bushing (30) and the rotary switch (20) are assembled on the panel (10), the insulating bushing (30) and the mounting hole (11) are coaxially arranged. The inner diameter of the mounting hole (11) is D. The maximum distance between the outer wall of the limiting rib (31) and the central axis of the insulating bushing (30) is L, where L > D / 2.

6. The knob assembly according to claim 5, characterized in that, The insulating bushing (30) has a baffle (33) at one end away from the limiting rib (31), and the maximum outer diameter of the baffle (33) is greater than the inner diameter of the mounting hole (11); The baffle (33) is provided with a positioning groove (331), and the inner side of the knob (40) is provided with a positioning rib (43). The shape of the positioning rib (43) is adapted to the positioning groove (331). The positioning rib (43) and the positioning groove (331) cooperate to limit the circumferential positioning of the knob (40) and the insulating bushing (30).

7. The knob assembly according to claim 1, characterized in that, The insulating bushing (30) and the knob (40) are fixedly connected by a snap-fit ​​structure or by fasteners.

8. The knob assembly according to claim 1, characterized in that, The insulating bushing (30) is provided with a bushing hole (34). The insulating bushing (30) is fitted onto the rotation control shaft (21) through the bushing hole (34). The bushing hole (34) is a non-circular hole, and the shape of the rotation control shaft (21) is adapted to the shape of the bushing hole (34).

9. The knob assembly according to claim 8, characterized in that, There is an assembly gap between the rotation control shaft (21) and the inner wall of the bushing hole (34).

10. The knob assembly according to any one of claims 1-9, characterized in that, The rotary switch (20) is a timer, encoder, gear switch or temperature controller.

11. A cooking utensil, characterized in that, Includes the knob assembly as described in any one of claims 1-10.

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