Knob structure and gas stove

Abstract

The present invention discloses a knob structure and a gas stove. The knob structure comprises a first knob and a second knob, wherein the first knob is provided with a detection device for detecting the rotation displacement of the first knob, the second knob is inserted into the first knob and penetrates the first knob, and the second knob is rotatable relative to the first knob. An air inlet pipe is provided on the gas stove, wherein a plurality of air outlets are provided on the air inlet pipe, some of the air outlets are provided with mechanical valves, and the remaining air outlets are provided with electric control valves. The gas stove is also provided with a knob structure, wherein a control panel is connected to the electric control valve, and a rotating rod of the second knob is connected to a valve stem of the mechanical valve. By combining the first knob and the second knob, independent control of the mechanical valve and the electric control valve is achieved, so that the user only needs to operate the knob structure at the same position of the gas stove to achieve independent control of the mechanical valve and the electric control valve, thereby improving the user experience.

Description

Technical Field

[0001] The invention belongs to the field of gas stoves, and in particular relates to a knob structure and a gas stove. Background Art

[0002] A gas stove or a kitchen or room with a work surface and equipped with built-in kitchenware usually includes a gas stove, which is either installed in the gas stove or embedded in the work surface. It is a kitchen appliance that is directly heated by gas fuel such as liquefied petroleum gas, artificial coal gas, natural gas, etc.; an existing gas stove generally has multiple burners and an air inlet pipe, and a plurality of air outlets are opened on the air inlet pipe. Some of the air outlets are provided with mechanical valves connected in series with the corresponding burners, and the remaining air outlets are provided with electric control valves connected in series with the corresponding burners. Each electric control valve is connected to a first knob that controls the opening and closing of the electric control valve Each mechanical valve is connected to a second knob for controlling the opening and closing of the mechanical valve, so that a single knob and a corresponding valve body combination can independently control one or more burners, that is, the first knob and the electric control valve combination can independently control one or more burners, and the second knob and the mechanical valve combination can independently control one or more burners. The first knob and the second knob are separately arranged to independently control their corresponding valve bodies. When operating, the user needs to operate the first knob and the second knob respectively at two positions of the gas stove to realize independent control of the mechanical valve and the electric control valve, which reduces the user experience. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a knob structure and a gas stove, so that a user can independently control a mechanical valve and an electric control valve by operating the knob structure at the same position of the gas stove, thereby improving the user experience.

[0004] In order to solve the above problems, the basic concept of the technical solution adopted by the present invention is:

[0005] The present invention provides a knob structure, comprising a first knob and a second knob. The first knob is provided with a detection device for detecting the rotation displacement of the first knob. The second knob is inserted into the first knob and passes through the first knob. The second knob is rotatable relative to the first knob.

[0006] Furthermore, the cover portion of the second knob is axially inserted into the cover of the first knob, the rotating rod of the first knob is axially provided with a first through hole, the rotating rod of the second knob passes through the cover of the first knob and is inserted into the first through hole, and the detection device is arranged on the rotating rod of the first knob.

[0007] Furthermore, a groove is provided on the rotary cover of the first knob, a first annular protrusion is provided at the bottom of the groove, a limiting groove is formed between the outer circumferential wall of the first annular protrusion and the inner circumferential wall of the groove, the rotating rod of the second knob passes through the rotary cover of the first knob through the annular protrusion, and the rotary cover part of the second knob is inserted into the limiting groove.

[0008] Furthermore, the detection device includes a columnar rotary encoder, the rotating rod of the first knob is sleeved on the outside of the columnar rotary encoder and drives the columnar rotary encoder to rotate, and the columnar rotary encoder is axially provided with a second through hole coaxial with the first through hole.

[0009] Furthermore, the inner peripheral wall of the rotating rod of the first knob is provided with a circle of second annular protrusions coaxial with the first through hole, and the columnar rotary encoder portion is inserted into the rotating rod of the first knob and abuts against the second annular protrusions.

[0010] Furthermore, the knob structure also includes a control board, which is used to receive the rotation displacement value detected by the rotary encoder and perform corresponding processing operations according to the rotation displacement value.

[0011] Furthermore, the control board is located at one end of the columnar rotary encoder away from the rotating rod of the first knob, and a third through hole coaxial with the second through hole is provided at the center of the control board.

[0012] Furthermore, the control panel is wrapped with a shell, and a fourth through hole coaxial with the third through hole is provided at the bottom of the shell. The columnar rotary encoder is inserted into the shell and rotatably connected to the control panel. A limiting space for limiting the columnar rotary encoder is formed between the control panel and the inner wall of the shell, and the columnar rotary encoder rotates in the limiting space.

[0013] Furthermore, a circle of third annular protrusions is provided on the outer peripheral wall of the columnar rotary encoder, and the third annular protrusions are located between the inner wall of the shell and the control board.

[0014] Furthermore, radial dimensions of the second through hole, the third through hole and the fourth through hole are the same.

[0015] The present invention also provides a gas stove, which is provided with an air inlet pipe, a plurality of air outlets, some of the air outlets are provided with mechanical valves, and the remaining air outlets are provided with electric control valves. The gas stove is also provided with a knob structure provided by the above technical solution, the outer shell is arranged on the gas stove, the control panel is connected to the electric control valve, and the rotating rod of the second knob is connected to the valve stem of the mechanical valve.

[0016] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0017] 1. By combining the first knob and the second knob, independent control of the mechanical valve and the electric control valve is achieved, so that the user only needs to operate the knob structure at the same position of the gas stove to achieve independent control of the mechanical valve and the electric control valve, thereby improving the user experience.

[0018] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0020] Figure 1 is a schematic diagram of the structure of a gas stove provided by an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of a knob structure in a gas stove provided by an embodiment of the present invention;

[0022] Figure 3 is a front view of a structural schematic diagram of a first knob in the knob structure provided by an embodiment of the present invention;

[0023] Figure 4 is a rear view of a schematic structural diagram of a first knob in the knob structure provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic structural diagram of a second knob in the knob structure provided by an embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of a housing in a knob structure provided by an embodiment of the present invention;

[0026] Figure 7 It is a cross-sectional view of a schematic structural diagram of a housing in a knob structure provided in an embodiment of the present invention.

[0027] Icons: 1-stove shell; 2-knob structure; 21-first knob; 211-screw cover of first knob; 212-screw rod of first knob; 213-groove; 214-first annular protrusion; 215-limiting groove; 216-second annular protrusion; 217-first through hole; 22-second knob; 221-screw cover of second knob; 222-screw rod of second knob; 3-intake pipe; 31-mechanical valve; 311-valve stem of mechanical valve; 4-detection device; 41-columnar rotary encoder; 42-third annular protrusion; 5-control panel; 6-housing; 61-limiting space; 7-burner; 8-through hole.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0030] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example

[0033] like Figure 1 as well as Figure 2 As shown, the present invention provides a gas stove, which is provided with an air intake pipe 33 and a knob structure 2. The air intake pipe 33 is provided with a mechanical valve 31 and an electric control valve. The knob structure 2 includes a first knob 21 and a second knob 22. The first knob 21 is provided with a detection device 4 for detecting the rotational displacement of the first knob 21. The detection device 4 is connected to the electric control valve. The second knob is axially inserted into the first knob 21 and connected to the valve stem 311 of the mechanical valve. The second knob 22 can rotate relative to the first knob 21.

[0034] In an embodiment of the present invention, a gas stove comprises a stove shell 1, on which an air inlet pipe 33, a burner 7 and a knob structure 2 are provided, on which a plurality of air outlets are provided, some of which are provided with mechanical valves 31 connected to one or more burners 7, and some of which are provided with electric-controlled valves connected to one or more burners 7. The knob structure 2 comprises a first knob 21 and a second knob 22 provided on the stove shell 1, on which a detection device 4 for detecting the rotational displacement of the first knob 21 is provided, and the detection device 4 is connected to the electric-controlled valve, and the detection device 4 rotates with the first knob 21 and detects the rotational displacement of the first knob 21. The gas stove controls the opening or closing of the electric-controlled valve through a signal of the rotational displacement, thereby realizing the ignition and energy size of the corresponding burner 7. In order to adjust and extinguish the fire, the second knob 22 is axially inserted into the first knob 21 and connected to the valve stem 311 of the mechanical valve. The second knob 22 can rotate relative to the first knob 21, that is, when the second knob 22 rotates, the first knob 21 does not rotate. The second knob 22 rotates, driving the valve stem 311 of the mechanical valve to rotate, and controlling the mechanical valve 31 to open or close, thereby realizing the adjustment of the ignition fire power of the corresponding burner 7 and extinguishing the fire. By combining the first knob 21 and the second knob 22, the mechanical valve 31 and the electric control valve can be independently controlled, thereby realizing the control of the corresponding burners 7, so that the user only needs to operate the knob structure at the same position of the gas stove to realize the independent control of the mechanical valve 31 and the electric control valve, thereby improving the user experience.

[0035] It should be noted that, for some gas stoves, a mechanical valve 31 is provided on the air outlet of the air inlet pipe 3, or an electric-controlled valve is provided on the air outlet of the air inlet pipe 33. In order to expand the scope of use of the knob structure 2, the first knob 21 and the second knob 22 are both used to control the mechanical valve 31, and the first knob 21 and the second knob 22 are combined. Alternatively, the first knob 21 and the second knob 22 are both used to control the electric-controlled valve, and the first knob 21 and the second knob 22 are combined, and a detection device 4 is provided on them.

[0036] like Figure 2 as well as Figure 5 As shown, in an embodiment of the present invention, the rotary cover 221 of the second knob is partially inserted into the rotary cover 211 of the first knob, the rotary rod 212 of the first knob is axially provided with a first through hole 217, the rotary rod 222 of the second knob passes through the rotary cover 211 of the first knob and is inserted into the first through hole 217, and the detection device 4 is arranged on the rotary rod 212 of the first knob.

[0037] In the embodiment of the present invention, the first knob 21 includes a first knob cover 211 and a first knob rod 212 axially arranged on the first knob cover 211, and the second knob includes a second knob cover 221 and a second knob rod 222 axially arranged on the second knob cover 221. The first knob 21 and the second knob 22 are combined as follows: the second knob cover 221 is partially inserted into the first knob cover 211, and since the first knob rod 212 is axially provided with a first through hole 217, the second knob rod 222 axially penetrates the second knob cover 221. The rotary cover 221 of the second knob is inserted into the first through hole 217, and the rotary rod 222 of the second knob may be exposed outside the rotary rod 212 of the first knob, or may not be exposed. If it is not exposed, the valve stem 311 of the mechanical valve may be inserted into the rotary rod 212 of the first knob. The rotary cover 221 of the second knob is rotated to drive the rotary rod 222 of the second knob to rotate in the rotary rod 212 of the first knob, thereby driving the valve stem 311 of the mechanical valve to rotate, but the rotary cover 211 of the first knob and the rotary rod 212 of the first knob do not rotate, so that the detection device 4 on the rotary rod 212 of the first knob does not rotate;

[0038] Preferably, the rotary cover 211 of the first knob, the rotary rod 212 of the first knob, the rotary cover 221 of the second knob, the rotary rod 222 of the second knob and the first through hole 217 are all coaxial to avoid affecting the state of the first knob when the second knob rotates;

[0039] The rotary cover 221 of the second knob is partially inserted into the rotary cover 211 of the first knob, that is, the rotary cover 221 of the second knob is partially exposed outside the rotary cover 211 of the first knob, so that the user can operate and rotate the rotary cover 221 of the second knob; the rotary cover 221 of the second knob is provided with an operating groove adapted to the fingers of the human body, and the user places the finger in the operating groove during operation, which is convenient for operating force.

[0040] like Figure 3 As shown, in the embodiment of the present invention, a groove is provided on the rotary cover 211 of the first knob, a first annular protrusion 214 is provided at the bottom of the groove, a limiting groove 215 is formed between the outer circumferential wall of the first annular protrusion 214 and the inner circumferential wall of the groove, the rotating rod 222 of the second knob passes through the rotary cover 211 of the first knob through the annular protrusion, and the rotary cover of the second knob is partially inserted into the limiting groove 215.

[0041] In the embodiment of the present invention, the rotary cover 221 of the second knob is partially inserted into the rotary cover 211 of the first knob in the following manner: a groove is provided on the rotary cover 211 of the first knob, and the rotary cover 221 of the second knob is inserted into the groove and can rotate relative to the rotary cover 211 of the first knob in the groove; in order to further increase the insertion strength of the rotary cover 221 of the second knob in the groove and ensure the combined strength between the rotary cover 211 of the first knob and the rotary cover 221 of the second knob, a circle of first annular protrusions 214 is provided at the bottom of the groove, and the outer periphery of the first annular protrusion 214 is A limiting groove 215 is formed between the wall and the inner circumferential wall of the groove, and the rotary cover 221 of the second knob is partially inserted into the limiting groove 215. The limiting groove 215 has a limiting effect on the rotary cover 221 of the second knob, so that the user can rotate the second knob more stably; at a position corresponding to the through hole of the first annular protrusion 214, a through hole is provided on the knob cover of the first knob, and the rotating rod 222 of the second knob passes through the knob cover of the first knob through the above two through holes and is inserted into the first through hole 217. Preferably, the first annular protrusion 214 is coaxial with the first through hole 217.

[0042] like Figure 6 As shown, in an embodiment of the present invention, the detection device 4 includes a columnar rotary encoder 41, the rotating rod 212 of the first knob is sleeved on the outside of the columnar rotary encoder 41 and drives the columnar rotary encoder 41 to rotate, and the columnar rotary encoder 41 is axially provided with a second through hole coaxial with the first through hole 217.

[0043] In an embodiment of the present invention, the detection device 4 includes a columnar rotary encoder 41, which is inserted into the rotary rod 212 of the first knob through the first through hole 217. The insertion can enable the columnar rotary encoder 41 to rotate following the rotary rod 212 of the first knob. The columnar rotary encoder 41 is provided with a second through hole coaxial with the first through hole 217. The valve stem 311 of the mechanical valve is connected to the rotary rod 222 of the second knob through the first through hole 217 and the second through hole. It should be noted that the connection between the valve stem 311 of the mechanical valve and the rotary rod 222 of the second knob is a plug-in connection. The valve stem 311 of the mechanical valve can rotate following the rotary rod 222 of the second knob. In addition, the rotary rod of the first knob can also be sleeved inside the columnar rotary encoder and drive the columnar rotary encoder to rotate. The connection between the rotary rod of the first knob and the rotary encoder only needs to satisfy the requirement that the rotary rod of the first knob can drive the rotary encoder to rotate.

[0044] The on-off of the burner controlled by the electric control valve is not affected by the on-off of the burner controlled by the mechanical valve 31; for example, the first knob 21 is pressed and rotated counterclockwise, and the rotation of the first knob 21 drives the columnar rotary encoder 41 to rotate, so that the columnar rotary encoder 41 sends a rotation displacement signal to the control board 5, and the control board 5 receives the signal and controls the electric control valve to open, and cooperates with the pulse igniter to realize the ignition of at least one ring of gas passage; the first knob 21 is pressed and rotated clockwise, and the rotation of the first knob 21 drives the columnar rotary encoder 41 to rotate, and the columnar rotary encoder 41 sends a rotation displacement signal to the control board 5. The control panel 5 controls the electric control valve to close, thereby shutting down at least one gas path. After the ignition is successful, the first knob 21 is rotated, and the rotation of the first knob drives the columnar rotary encoder 41 to rotate. The columnar rotary encoder 41 sends a rotation displacement signal to the control panel 5. The control panel 5 controls the electric control valve to adjust the gas output volume, thereby controlling the firepower of the burner 7. The electric control valve is not shown in the figure. Similarly, pressing and rotating the second knob 22 can ignite or shut down the burner 7, and adjusting the mechanical valve 31 can adjust the firepower of the burner 7.

[0045] like Figure 4 As shown, in the embodiment of the present invention, the inner circumferential wall of the rotating rod 212 of the first knob is provided with a circle of second annular protrusions 216 coaxial with the second through hole, and the columnar rotary encoder 41 is partially inserted into the rotating rod 212 of the first knob and abuts against the second annular protrusion 216.

[0046] In the embodiment of the present invention, a circle of second annular protrusions 216 are provided on the inner circumferential wall of the rotating rod 212 of the first knob, and the second annular protrusions 216 are coaxial with the first through hole 217. The columnar rotary encoder 41 is inserted into the rotating rod 212 of the first knob, and abuts against the second annular protrusions 216 in the rotating rod 212 of the first knob. The existence of the second annular protrusions 216 increases the contact area between the columnar rotary encoder 41 and the rotating rod 212 of the first knob, and improves the insertion strength between the columnar rotary encoder 41 and the rotating rod 212 of the first knob.

[0047] A through hole is formed in the second annular protrusion 216 . The rotating rod 222 of the second knob passes through the rotating rod 212 of the first knob and then is inserted into the first through hole 217 through the through hole of the second annular protrusion 216 .

[0048] like Figure 7 As shown, in an embodiment of the present invention, the knob structure also includes a control board 5, which is used to receive the rotational displacement value detected by a columnar rotary encoder and perform corresponding processing operations according to the rotational displacement value. The control board 5 is arranged on the gas stove and connected to the electric control valve.

[0049] In an embodiment of the present invention, the control board 5 is respectively connected to the electric control valve and the columnar rotary encoder 41. The columnar rotary encoder 41 detects the rotational displacement of the first knob 21 and sends the rotational displacement signal to the control board 5. The control board 5 receives the rotational displacement signal and controls the opening or closing of the electric control valve according to the rotational displacement signal.

[0050] Specifically, the control board 5 is located at one end of the columnar rotary encoder 41 away from the rotating rod 212 of the first knob, and a third through hole coaxial with the second through hole is provided at the center of the control board 5; a third through hole is provided at the center of the control board 5, and the third through hole is coaxial with the second through hole, and the valve stem 311 of the mechanical valve is connected to the rotating rod 222 of the second knob via the third through hole, the second through hole and the first through hole 217.

[0051] like Figure 6 as well as Figure 7 As shown, in the embodiment of the present invention, the control board 5 is enclosed by a shell 6, a fourth through hole coaxial with the third through hole is provided at the bottom of the shell 6, a columnar rotary encoder 41 is inserted into the shell 6 and rotatably connected to the control board 5, and a limiting space 61 for clamping the columnar rotary encoder 41 is formed between the control board 5 and the inner wall of the shell 6.

[0052] In the embodiment of the present invention, a shell 6 is provided on the periphery of the control board 5, and the shell 6 plays a role in protecting the control board 5 to prevent the control board 5 from being degraded in sensitivity due to the external environment;

[0053] A fourth through hole is provided at the bottom of the housing, and the fourth through hole is coaxial with the third through hole. The valve stem 311 of the mechanical valve is connected to the rotating rod 222 of the second knob via the fourth through hole, the third through hole, the second through hole and the first through hole 217;

[0054] The control board is arranged at the bottom of the housing, and a limiting space 61 for limiting the columnar rotary encoder is formed between the control board and the inner wall of the housing. The columnar rotary encoder 41 rotates in the limiting space 61, and the limiting space 61 limits the rotation of the columnar rotary encoder 41 to prevent the columnar rotary encoder 41 from deviating during rotation, thereby causing inaccurate control of the electric control valve.

[0055] The housing 6 is arranged on the gas stove in the following manner: the housing 6 is fixed to the mechanical valve by a fixing structure such as screws, or can be fixed to the back of the stove panel by a fixing structure; the control board 5 is arranged on the housing 6 in the following manner: the control board 5 and the housing 6 are fixed to the inner wall of the housing by a structure such as screws; the columnar rotary encoder 41 is rotatably connected to the control board 5, and the control board 5 does not rotate with the rotation of the columnar rotary encoder 41;

[0056] Specifically, a circle of third annular protrusions 42 is provided on the outer peripheral wall of the columnar rotary encoder 41, and the third annular protrusions 42 are clamped between the inner wall of the outer shell 6 and the control board 5; the part of the inner wall of the outer shell above the control board 5 is stepped, and the third annular protrusions 42 are clamped between the stepped inner wall of the outer shell and the control board 5.

[0057] In the embodiment of the present invention, radial dimensions of the second through hole, the third through hole and the fourth through hole are the same.

[0058] In an embodiment of the present invention, the radial dimensions of the second through hole, the third through hole and the fourth through hole are equal, so that the second through hole, the third through hole and the fourth through hole are connected to form a through hole 8 whose radial dimension remains unchanged along the axial direction, and the through hole 8 realizes the connection between the valve stem 311 of the mechanical valve and the rotating rod of the second knob.

[0059] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A knob structure, characterized in that: The invention comprises a first knob and a second knob, wherein the first knob is provided with a detection device for detecting the rotation displacement of the first knob, the second knob is inserted into the first knob and passes through the first knob, and the second knob is rotatable relative to the first knob; The rotating rod of the first knob is provided with a first through hole along the axial direction, and the rotating rod of the second knob passes through the rotating cover of the first knob and is inserted into the first through hole; The detection device includes a columnar rotary encoder, a rotary rod of a first knob is sleeved on the outside of the rotary encoder and drives the rotary encoder to rotate, and the rotary encoder is provided with a second through hole coaxial with the first through hole along the axial direction; The knob structure includes a control board connected to the electric control valve, the control board is located at one end of the rotary encoder of the rotary rod away from the first knob, and a third through hole coaxial with the second through hole is arranged at the center of the control board; The rotary encoder is rotatably connected to the control panel; The valve stem of the mechanical valve of the gas stove is connected with the rotating rod of the second knob through the third through hole, the second through hole and the first through hole.

2. The knob structure according to claim 1, characterized in that: The rotary cover portion of the second knob is axially inserted into the rotary cover of the first knob.

3. The knob structure according to claim 2, characterized in that: A groove is provided on the rotary cover of the first knob, a first annular protrusion is provided at the bottom of the groove, a limiting groove is formed between the outer circumferential wall of the first annular protrusion and the inner circumferential wall of the groove, the rotary rod of the second knob passes through the rotary cover of the first knob through the first annular protrusion, and the rotary cover of the second knob is partially inserted into the limiting groove.

4. The knob structure according to claim 1, characterized in that: The inner peripheral wall of the rotating rod of the first knob is provided with a circle of second annular protrusions coaxial with the first through hole, and the columnar rotary encoder part is inserted into the rotating rod of the first knob and abuts against the second annular protrusion.

5. The knob structure according to claim 1, characterized in that: The control board is used to receive the rotation displacement value detected by the columnar rotary encoder and perform corresponding processing operations according to the rotation displacement value.

6. The knob structure according to claim 5, characterized in that: The control board is surrounded by a shell, and a fourth through hole coaxial with the third through hole is provided at the bottom of the shell. A columnar rotary encoder is inserted into the shell and rotatably connected to the control board. A limiting space is formed between the control board and the inner wall of the shell to limit the columnar rotary encoder.

7. The knob structure according to claim 6, characterized in that: The radial dimensions of the second through hole, the third through hole and the fourth through hole are the same.

8. The knob structure according to claim 6, characterized in that: A circle of third annular protrusions is arranged on the outer peripheral wall of the columnar rotary encoder, and the third annular protrusions are located between the inner wall of the shell and the control board.

9. A gas stove, wherein an air inlet pipe is provided on the gas stove, a plurality of air outlets are provided on the air inlet pipe, some of the air outlets are provided with mechanical valves, and the remaining air outlets are provided with electric control valves, characterized in that: The gas stove is also provided with a knob structure as described in any one of claims 1 to 8.

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