Food processor

Abstract

The utility model relates to the field of food processing, and discloses a food processor which comprises a motor, a control circuit electrically connected with the motor, and a control unit connected with the control circuit, the control circuit comprises a power supply circuit used for being connected with an external power supply and a switching circuit connected between the motor and the power supply circuit, and the switching circuit comprises a main loop used for being connected with the motor and the power supply circuit, a detection loop used for detecting the state of the main loop and a rotary rod switch connected with the control unit and the detection loop; the rotary rod switch comprises a plurality of switch gears, and each switch gear corresponds to a unique main loop state and a unique detection loop state. Compared with the prior art, the food processor provided by the embodiment of the utility model has the advantages that the operation state of the motor can be accurately detected while the operation state of the motor can be accurately controlled to be switched.

Description

Technical Field

[0001] The utility model relates to the field of food processing, in particular to a food processing machine. Background Art

[0002] At present, food processing machines such as juicers, noodle machines, and food processors are all equipped with motors and control circuits. In order to realize different food processing functions, the control circuits of these food processing machines often need to control the motor to switch forward and reverse when processing food. For example, the prior art with application number 202321005450.0 provides a multifunctional motor control switch, which sets the positive and negative contacts of the motor relative to each other, uses the free end of the shrapnel to move between the positive contact of the motor and the negative contact of the motor, and realizes the switching of different trigger circuits through the force of the handle assembly and the rebound of the free end of the shrapnel, thereby realizing the forward and reverse switching of the motor. This switching mode is relatively simple, the product operation mode is limited, the usage scenarios are limited, and the user experience based on the user's actual operation scenario is relatively general.

[0003] To improve the overall safety of food processors, the control circuit must not only switch the motor's forward and reverse rotation but also monitor the motor's operating status, including forward, reverse, and stopped, in real time. Prior art application number 201520132867.2 discloses a low-cost food processor that uses a microcontroller to detect the load of the main circuit and indirectly infer the operating status of the switch and motor based on the load status. However, this circuit does not directly detect the switch status, but rather indirectly detects it through an algorithmic determination, which poses a risk of misjudgment and reduces the overall safety and reliability of the food processor. Utility Model Content

[0004] The purpose of the present utility model is to provide a food processing machine to solve the problems of inaccurate and untimely switching of the working state of the food processing machine in a multi-mode switching scenario, and the problem that the circuit detection of the corresponding switching mode is prone to misjudgment and wrong judgment.

[0005] In a first aspect, an embodiment of the present application provides a food processing machine, comprising: a motor, a control circuit electrically connected to the motor, and a control unit connected to the control circuit; the control circuit comprises a power supply circuit for connecting to an external power supply, a switching circuit connected between the motor and the power supply circuit, the switching circuit comprising a main circuit for connecting the motor and the power supply circuit, a detection circuit for detecting the status of the main circuit, and a rotary switch connected to the control unit and the detection circuit; the rotary switch comprises a plurality of switch positions, each of the switch positions corresponding to a unique main circuit state and a unique detection circuit state.

[0006] Compared with the related art, the food processor provided in the embodiment of the present application is provided with a rotary switch including multiple switch positions. When the rotary switch is switched to each switch position, the operating state of the main circuit is switched to a unique corresponding main circuit state. Since the motor and the power supply circuit are connected via the main circuit, the operating state of the motor can be switched by switching the main circuit state of the switch circuit; at the same time, when the rotary switch is switched to each switch position, the operating state of the detection circuit is also switched to a unique corresponding detection circuit state. Since there is a unique corresponding relationship between each switch position, each main circuit state and each detection circuit state, the main circuit state and the motor operating state at this time can be reversely determined based on the actual detection circuit state, thereby achieving accurate detection of the motor operating state and improving the reliability of multi-mode switching of the food processor's working state.

[0007] In an optional embodiment, the rotary rod switch includes a rotary rod and a plurality of electrodes arranged in cooperation with the rotary rod, the plurality of electrodes being respectively connected to the power circuit, the motor and the detection circuit; corresponding to different switch positions, the rotary rod connects / disconnects the plurality of electrodes to each other, so that the main circuit is in a uniquely corresponding main circuit state and the detection circuit is in a uniquely corresponding detection circuit state. By connecting / disconnecting the plurality of electrodes to each other through the rotary rod, the switching of the main circuit state of the main circuit and the detection circuit state of the detection circuit is achieved, that is, the switching of the main circuit state and the detection circuit state is achieved through a mechanical mechanism. Since the mechanical mechanism is hardly affected by the fluctuation of the relevant electrical signals in the circuit, the switching reliability of the main circuit state can be made higher, that is, the reliability of the switching process of the motor's operating state is also higher; in addition, by simultaneously achieving the switching of the main circuit state and the detection circuit state through the mechanical structure, the reliability of the correspondence between the detection circuit state and the main circuit state can also be improved, that is, the reliability of the detection result of the motor's operating state is also improved.

[0008] In an optional embodiment, the multiple electrodes include a number of power supply electrodes connected to the power supply circuit, a number of motor electrodes connected to the motor, and a number of detection electrodes connected to the detection circuit; corresponding to different switch positions, the rotary rod connects / disconnects the number of power supply electrodes and the number of motor electrodes in a uniquely corresponding main circuit connection mode, and the main circuit is in a uniquely corresponding main circuit state, and the number of detection electrodes are connected / disconnected in a uniquely corresponding detection circuit connection mode, and the detection circuit is in a uniquely corresponding detection circuit state.

[0009] In an optional embodiment, the switch positions include a forward position, a reverse position, and a closed position; the multiple electrodes include a number of power electrodes connected to the power circuit, a number of motor electrodes connected to the motor, and a number of detection electrodes connected to the detection circuit; corresponding to the forward position, the rotating rod connects the number of power electrodes and the number of motor electrodes in a forward direction, the main circuit is forward-conducted, the number of detection electrodes are connected in a first state, and the detection circuit is forward-conducted; corresponding to the reverse position, the rotating rod connects the number of power electrodes and the number of motor electrodes in a reverse direction, the main circuit is reverse-conducted, the number of detection electrodes are connected in a second state, and the detection circuit is reverse-conducted; corresponding to the closed position, the rotating rod disconnects the number of power electrodes and the number of motor electrodes, disconnects the main circuit, disconnects the number of detection electrodes, and disconnects the detection circuit.

[0010] In an optional embodiment, the rotary switch further includes a plurality of springs, and the plurality of electrodes are respectively arranged on the plurality of springs; corresponding to different switch positions, the rotary rod pushes the plurality of springs so that the plurality of electrodes are connected / disconnected with each other in a unique corresponding connection manner.

[0011] In an optional embodiment, the rotary switch further comprises a protruding structure provided on the rotary rod; corresponding to different switch positions, the protruding structure pushes the multiple springs to connect / disconnect the multiple electrodes to each other in a unique corresponding connection manner.

[0012] In an optional embodiment, the protrusion structure includes a plurality of protrusions arranged along the radial direction of the rotating rod, and the plurality of protrusions are arranged in a stepped manner.

[0013] In an optional embodiment, the outer side surfaces of the multiple protrusions are arc-shaped surfaces with different radii, and all of the arc-shaped surfaces correspond to the same center of a circle.

[0014] In an optional embodiment, the plurality of protrusions include a first protrusion, a second protrusion, and a third protrusion, and the radius of the outer side surface of the second protrusion is an average of the radius of the outer side surface of the first protrusion and the radius of the outer side surface of the third protrusion.

[0015] In an optional embodiment, the rotary rod switch further includes a housing, the rotary rod is rotatably disposed on the housing, and the housing includes a snap structure, which is used to hold the rotary rod in the axial direction of the rotary rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the circuit structure of a food processor provided in one embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a rotary switch provided in some embodiments of the present application;

[0019] Figure 3 A top view of the rotary switch provided in some embodiments of the present application when in the forward position;

[0020] Figure 4 A bottom view of the rotary switch provided in some embodiments of the present application when in the forward position;

[0021] Figure 5 A top view of the rotary switch provided in some embodiments of the present application when in the reverse position;

[0022] Figure 6 A bottom view of the rotary switch provided in some embodiments of the present application when in the reverse position;

[0023] Figure 7 A top view of a knob switch provided in some embodiments of the present application when in the off position;

[0024] Figure 8 A bottom view of the rotary switch provided in some embodiments of the present application when in the off position;

[0025] Figure 9 A schematic structural diagram of a rotary rod provided in some embodiments of the present application;

[0026] Figure 10 A top view of a rotating rod provided in some embodiments of the present application. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention but merely represents selected embodiments of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0031] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0032] The first embodiment of the present invention provides a food processing machine, such as Figure 1 As shown, it includes: a motor 10, a control circuit 20 electrically connected to the motor 10, and a control unit 30 electrically connected to the control circuit 20. The control circuit 20 includes a power circuit 21 and a switch circuit 22. The power circuit 21 is used to connect to an external power supply 40, and the switch circuit 22 is used to connect the motor 10 and the power circuit 21. The switch circuit 22 includes a main circuit 221, a detection circuit 222, and a knob switch ( Figure 1 (not shown), the main circuit 221 is used to connect the motor 10 and the power circuit 21, that is, the motor 10 is connected to the external power supply 40 via the power circuit 21 and the main circuit 221, and the detection circuit 222 is used to detect the main circuit state of the main circuit 221. Among them, the rotary switch includes multiple switch positions, each switch position corresponds to a unique main circuit state and a unique detection circuit state. That is, the main circuit state and detection circuit state corresponding to each switch position are different, and there is a one-to-one correspondence between the switch position, the main circuit state, and the detection circuit state.

[0033] Compared with the related art, the food processor provided in the embodiment of the present application is provided with a rotary switch including multiple switch positions. When the rotary switch is switched to each switch position, the operating state of the main circuit 221 is switched to the main circuit state uniquely corresponding to the switch position. Since the motor 10 and the power supply circuit 21 are connected via the main circuit 221, the operating state of the motor 10 can be switched by switching the main circuit state of the switch circuit 22; at the same time, when the rotary switch is switched to each switch position, the operating state of the detection circuit 222 is also switched to the unique corresponding detection circuit state. Since each switch position, each main circuit state and each detection circuit state are mutually and uniquely corresponding, the main circuit state and the motor operating state at this time can be reversely determined based on the actual detection circuit state, thereby realizing accurate detection of the motor operating state.

[0034] For further information, please refer to Figure 1 and Figure 2 , Figure 2 The diagram shows a schematic diagram of the structure of the rotary switch provided by some embodiments of the present application. Figure 1 and Figure 2 As shown, in some embodiments of the present application, the rotary switch may include: a rotary rod 100 and a plurality of electrodes 200 arranged in conjunction with the rotary rod 100. The plurality of electrodes 200 are respectively connected to the power circuit 21, the motor 10, and the detection circuit 222. Corresponding to the different switch positions of the rotary switch, the plurality of electrodes 200 can be connected or disconnected with each other in different connection modes. The plurality of electrodes 200 connected / disconnected with each other in different connection modes correspond to different main circuit states and detection circuit states, that is, each switch position corresponds to a unique electrode connection mode, and the unique electrode connection mode corresponds to a unique main circuit state and a unique detection circuit state. Each detection circuit state also uniquely corresponds to the main circuit state, so that the main circuit state can be reversely determined based on the detection circuit state of the detection circuit. After determining the main circuit state, since the motor 10 is connected to the power circuit 21 via the main circuit, the operating state of the motor 10 can be determined based on the main circuit state.

[0035] In the embodiment of the present application, the rotating rod 100 pushes the multiple electrodes 200 to connect / disconnect with each other, thereby realizing the switching of the main circuit state of the main circuit 221 and the detection circuit state of the detection circuit 222, that is, the switching of the main circuit state and the detection circuit state is realized by a mechanical mechanism. Since the mechanical mechanism is almost not affected by the fluctuation of the relevant electrical signals in the circuit, the switching reliability of the main circuit state can be made higher, that is, the reliability of the switching process of the operating state of the motor 10 is also higher; in addition, by realizing the switching of the main circuit state and the detection circuit state at the same time through the mechanical structure, the reliability of the correspondence between the detection circuit state and the main circuit state can also be improved, that is, the reliability of the detection result of the operating state of the motor 10 is also improved.

[0036] In an embodiment of the present application, the plurality of electrodes 200 can be further divided into a plurality of power supply electrodes 201 connected to the power supply circuit 21, a plurality of motor electrodes 202 connected to the motor 10, and a plurality of detection electrodes 203 connected to the detection circuit 222. Corresponding to different switch positions, the rotary rod 100 pushes the plurality of power supply electrodes 201 and the plurality of motor electrodes 202 to connect / disconnect in a uniquely corresponding main circuit connection mode. Corresponding to the different connection modes of the power supply electrodes 201 and the plurality of motor electrodes 202, the main circuit 221 is in a uniquely corresponding main circuit state, the plurality of detection electrodes 203 are connected / disconnected in a uniquely corresponding detection circuit connection mode, and corresponding to the different connection modes of the detection electrodes 203, the detection circuit 222 is in a uniquely corresponding detection circuit state.

[0037] Please continue to refer to Figure 2 ,by Figure 2 As an example, multiple electrodes 200 are illustrated, corresponding to Figure 2 The knob switch shown in the figure may have multiple switch positions corresponding to it, including a forward position, a reverse position, and an off position; the power supply electrodes 201 may specifically include a first power supply electrode 2011 and a second power supply electrode 2012; the motor electrodes 202 may specifically include a first motor electrode 2021 and a second motor electrode 2022; and the detection electrodes 203 may specifically include a first detection electrode 2031, a second detection electrode 2032, and a third detection electrode 2033.

[0038] Please refer to Figure 3 and Figure 4 , Figure 3 The diagram shows a top view of the rotary switch in the forward position. Figure 4 The diagram shows a schematic top view of the rotary switch in the forward position. In the forward position, the rotary rod pushes the power supply electrodes 201 and the motor electrodes 202 into forward connection, enabling the main circuit to conduct forward. The detection electrodes 203 are connected in a first state, enabling the detection circuit to conduct forward. Specifically, the rotary rod can rotate to connect the first power supply electrode 2011 to the first motor electrode 2021, the second power supply electrode 2012 to the second motor electrode 2022, and the first detection electrode 2031 to the third detection electrode 2033. When the first power supply electrode 2011 is connected to the first motor electrode 2021 and the second power supply electrode 2012 to the second motor electrode 2022, the main circuit conducts forward. When the first detection electrode 2031 is connected to the third detection electrode 2033, the detection circuit conducts forward.

[0039] Please refer to Figure 5 and Figure 6 , Figure 5 The diagram shows a top view of the rotary switch in the reverse position. Figure 6 The diagram shows a schematic diagram of a top view of the rotary switch in the reverse position. In the reverse position, the rotary rod pushes the power supply electrodes 201 and the motor electrodes 202 to reverse their connection, reversing the main circuit conduction. The detection electrodes 203 are connected in a second state, reversing the detection circuit conduction. Specifically, the rotary rod can rotate to connect the first power supply electrode 2011 and the second motor electrode 2021, the second power supply electrode 2012 and the first motor electrode 2022, and the second detection electrode 2032 and the third detection electrode 2033. When the first power supply electrode 2011 and the second motor electrode 2021 are connected, and the second power supply electrode 2012 and the first motor electrode 2022 are connected, the main circuit conduction is reversed. When the second detection electrode 2032 and the third detection electrode 2033 are connected, the detection circuit conduction is reversed.

[0040] Please refer to Figure 7 and Figure 8 , Figure 7 The diagram shows a top view of the rotary switch in the off position. Figure 8 The diagram shows a schematic diagram of a bottom view of the rotary switch in the off position. In the off position, the rotary rod disconnects the power supply electrodes 201 and the motor electrodes 202, disconnecting the main circuit. The detection electrodes 203 are also disconnected, disconnecting the detection circuit. Specifically, the rotary rod can rotate to disconnect the first power supply electrode 2011, the second power supply electrode 2012, the first motor electrode 2021, the second motor electrode 2022, the first detection electrode 2031, the second detection electrode 2032, and the third detection electrode 2033. When the first power supply electrode 2011, the second power supply electrode 2012, the first motor electrode 2021, and the second motor electrode 2022 are disconnected, the main circuit is disconnected. When the first detection electrode 2031, the second detection electrode 2032, and the third detection electrode 2033 are disconnected, the detection circuit is disconnected.

[0041] Please continue to refer to Figure 2 In some embodiments of the present application, the rotary switch may include multiple springs 300, with all electrodes 200 disposed on the springs 300. Specifically, the springs 300 may be moved when the rotary rod 100 rotates, thereby driving the multiple electrodes 200 to form different connection modes. That is, for each switch mode, the rotary rod 100 rotates, pushing the springs 300 to move, driving the multiple electrodes 200 to form a connection mode uniquely corresponding to the switch mode, thereby connecting / disconnecting the multiple electrodes 200 to each other.

[0042] Please refer to Figure 2 and Figure 9 ,like Figure 9 FIG. 1 is a schematic structural diagram of a rotary rod 100 provided in some embodiments of the present application. Figure 2 and Figure 9 As shown, in some embodiments of the present application, a protruding structure 400 is provided on the rotary rod 100, and the protruding structure 400 is provided corresponding to the spring 300. Corresponding to different switch positions of the knob switch, the protruding structure 400 can push the spring 300 so that the multiple electrodes 200 are connected / disconnected with each other in a unique corresponding connection method.

[0043] Please continue to refer to Figure 9 In some embodiments of the present application, the protrusion structure 400 includes a plurality of protrusions arranged along the radial direction of the rotating rod 100. For example, the plurality of protrusions may be as follows: Figure 9The first protrusion 401, the second protrusion 402, and the third protrusion 403 are shown. Alternatively, in some other embodiments of the present application, the plurality of protrusions may include only two protrusions or more protrusions, such as Figure 9 The first protrusion 401 , the second protrusion 402 , and the third protrusion 403 are merely examples of some embodiments of the present application.

[0044] In some embodiments of the present application, the plurality of protrusions may be arranged in a stepped manner, that is, the heights of the plurality of protrusions in the radial direction of the rotating rod 100 gradually decrease. Figure 9 As shown, the first protrusion 401 has the largest height in the radial direction of the rotating rod 100, the second protrusion 402 has the second largest height in the radial direction of the rotating rod 100, and the third protrusion 403 has the smallest height in the radial direction of the rotating rod 100. The first protrusion 401, the second protrusion 402, and the third protrusion 403 are arranged in a stepped manner.

[0045] Please refer to Figure 10 , Figure 10 The figure shows a top view of the rotating rod 100. In some embodiments of the present application, the outer side surfaces of the multiple protrusions may be arc-shaped surfaces of different radii, and all of the arc-shaped surfaces corresponding to the multiple protrusions correspond to the same center. That is, in a radial cross-section of the rotating rod 100, the curve corresponding to the outer side surface of each protrusion is an arc segment, and each arc segment corresponds to the same center. The center of the circle can be, for example, the rotation axis of the rotating rod 100.

[0046] Please continue to refer to Figure 10 In some embodiments of the present application, on the radial cross-section of the rotating rod 100 , the radius r2 of the outer side surface of the second protrusion 402 is the average of the radius r1 of the outer side surface of the first protrusion 401 and the radius r3 of the outer side surface of the third protrusion 403 .

[0047] Continuing with reference to 2, in some embodiments of the present application, a plurality of protrusion structures 400 may be provided on the rotary rod 100. Corresponding to different switch positions, different protrusions in different protrusion structures 400 push corresponding springs 300 to connect / disconnect the plurality of electrodes 200 in different connection modes.

[0048] Please continue to refer to Figure 2 In some embodiments of the present application, the rotary lever switch may further include a housing 500, on which the rotary lever 100 is rotatably disposed. The housing 500 is provided with a snap-fit structure 501, which is used to hold the rotary lever 100 in the axial direction of the rotary lever 100. That is, after the rotary lever 100 is disposed on the housing 500, the rotary lever 100 can rotate on the housing 500 around its rotation axis, while in the radial direction of the rotary lever 100, the rotary lever 100 is fixed by the snap-fit structure 501 and cannot move in the radial direction.

[0049] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A food processing machine, characterized in that: include: a motor, a control circuit electrically connected to the motor, and a control unit connected to the control circuit; The control circuit includes a power supply circuit for connecting to an external power supply, a switch circuit connected between the motor and the power supply circuit, the switch circuit including a main circuit for connecting the motor and the power supply circuit, a detection circuit for detecting a main circuit state of the main circuit, and a rotary switch connected to the control unit and the detection circuit; The rotary switch includes a plurality of switch positions, each of which corresponds to a unique main circuit state and a unique detection circuit state.

2. The food processing machine according to claim 1, wherein The rotary rod switch includes a rotary rod and a plurality of electrodes arranged in cooperation with the rotary rod, wherein the plurality of electrodes are respectively connected to the power supply circuit, the motor and the detection circuit; Corresponding to different switch positions, the rotary rod connects / disconnects the multiple electrodes to each other, so that the main circuit is in the unique corresponding main circuit state and the detection circuit is in the unique corresponding detection circuit state.

3. The food processing machine according to claim 2, characterized in that The plurality of electrodes include a plurality of power supply electrodes connected to the power supply circuit, a plurality of motor electrodes connected to the motor, and a plurality of detection electrodes connected to the detection circuit; Corresponding to different switch positions, the rotary rod connects / disconnects the multiple power supply electrodes and the multiple motor electrodes in a uniquely corresponding main circuit connection mode, and the main circuit is in a uniquely corresponding main circuit state; the multiple detection electrodes are connected / disconnected in a uniquely corresponding detection circuit connection mode, and the detection circuit is in a uniquely corresponding detection circuit state.

4. The food processing machine according to claim 3, characterized in that The switch positions include a forward position, a reverse position, and an off position; Corresponding to the forward gear position, the rotating rod connects the power supply electrodes and the motor electrodes in a forward direction, the main circuit is forward-conducted, the detection electrodes are connected in a first state, and the detection circuit is forward-conducted; Corresponding to the reverse gear, the rotating rod reversely connects the power supply electrodes and the motor electrodes, reverses the conduction of the main circuit, connects the detection electrodes in the second state, and reverses the conduction of the detection circuit; Corresponding to the closing position, the rotary rod disconnects the power supply electrodes and the motor electrodes, disconnects the main circuit, disconnects the detection electrodes, and disconnects the detection circuit.

5. The food processing machine according to claim 2, characterized in that The rotary switch further includes a plurality of springs, and the plurality of electrodes are respectively arranged on the plurality of springs; Corresponding to different switch positions, the rotary rod pushes the multiple springs to connect / disconnect the multiple electrodes with each other in a unique corresponding connection manner.

6. The food processing machine according to claim 5, characterized in that The rotary rod switch further includes a protruding structure provided on the rotary rod; Corresponding to different switch positions, the protruding structure pushes the multiple springs to connect / disconnect the multiple electrodes to each other in a unique corresponding connection manner.

7. The food processing machine according to claim 6, characterized in that The protrusion structure includes a plurality of protrusions arranged along the radial direction of the rotating rod, and the plurality of protrusions are arranged in a stepped shape.

8. The food processing machine according to claim 7, characterized in that The outer side surfaces of the plurality of protrusions are arc-shaped surfaces with different radii, and all the arc-shaped surfaces correspond to the same center of a circle.

9. The food processing machine according to claim 8, characterized in that The plurality of protrusions include a first protrusion, a second protrusion, and a third protrusion, and a radius of an outer side surface of the second protrusion is an average of a radius of an outer side surface of the first protrusion and a radius of an outer side surface of the third protrusion.

10. The food processor according to claim 2, wherein The rotary rod switch further comprises a housing, the rotary rod is rotatably arranged on the housing, and the housing comprises a buckle structure, and the buckle structure is used to clamp the rotary rod in the axial direction of the rotary rod.

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