A rotary switch and control panel for a food processing appliance

Abstract

This application discloses a rotary switch and control board for a food processing appliance. The rotary switch body is equipped with a forward rotation lever and a reverse rotation lever. The control board is equipped with a forward rotation micro switch, a reverse rotation micro switch, and a rectifier module. Rotating the switch body couples the forward rotation lever and the reverse rotation lever with the corresponding forward rotation micro switch and the reverse rotation micro switch, realizing forward and reverse rotation control functions. This solution simplifies the wiring process of the rotary switch. Furthermore, the forward rotation lever and the reverse rotation lever, together with the forward rotation micro switch and the reverse rotation micro switch, form a mechanical triggering structure, ensuring stable and reliable control. In addition, the reverse rotation micro switch is automatically triggered once during the rotation of the rotary switch from the forward position to the stop position, making operation convenient and improving user experience and ease of use.

Description

Technical Field

[0001] This utility model relates to the field of food processing electrical appliances, specifically to a rotary switch and control board for a food processing electrical appliance. Background Technology

[0002] In food processing appliances such as juicers and slow juicers, when processing high-fiber ingredients (such as celery and ginger), residue can easily become entangled in the blades or clog the filter, causing the machine to jam. To solve this problem, most appliances are equipped with a forward and reverse function, which loosens the entangled fibers by briefly rotating in the opposite direction, restoring the equipment to normal operation.

[0003] Existing designs mostly use rocker switches or multi-position rotary switches to achieve forward and reverse functions. However, these control switches have complex wiring structures, and their functions rely on microprocessor programming on the main control board, resulting in poor reliability and stability of the electrical appliances. Utility Model Content

[0004] To address the aforementioned shortcomings, this utility model provides a rotary switch and control board for a food processing appliance, aiming to simplify the control structure and improve the operational stability and reliability of the food processing appliance.

[0005] This application provides a control board for coupling with a food processing appliance to control the forward, reverse, and stop rotation of a motor assembly. The control board has AC input terminals and positive and negative DC output terminals, used for connecting to an input power supply and providing drive power to the motor assembly, respectively. The control board is equipped with: The common terminal of the forward and reverse microswitches is connected to the DC output terminal; the normally open contacts of the forward and reverse microswitches are connected to each other, and the normally closed contacts are connected to each other. The rectifier module has its AC input pins connected to the AC input terminals, and the normally closed and normally open contacts of the forward micro switch are connected to the positive and negative output pins of the rectifier module, respectively.

[0006] This application also provides a rotary switch, which is configured with a forward rotation position, a reverse rotation position and a stop position arranged in a circumferential direction. The forward rotation position and the reverse rotation position are located on both sides of the stop position. The rotary switch includes a switch body and a control board. The control board is the control board described above and is fixed in the main housing of the food processing appliance, and is arranged opposite to the switch body. The switch body is cylindrical, and a forward rotation lever and a reverse rotation lever are provided on the side facing the control board. The switch body is configured such that when the switch body is rotated, the forward rotation lever and the reverse rotation lever are coupled to the forward rotation micro switch and the reverse rotation micro switch respectively. The reset spring is configured to compress and store energy during the process of the switch body rotating from the stop position to the reverse position under the action of external force, and to reset from the reverse position to the stop position after the external force is removed from the switch body.

[0007] The aforementioned rotary switch and control board form a modular design, requiring only four external connection wires, simplifying wiring and making assembly and replacement convenient. The forward and reverse levers, along with the forward and reverse microswitches, constitute a mechanical triggering structure, ensuring stable and reliable control functionality.

[0008] In the above technical solution, preferably, a decoupling lever is also provided on the side of the switch body facing the control board, and configured such that: during the process of the switch body rotating to the stop position, the decoupling lever presses against and disengages the triggering mechanism of the reverse micro switch. In this embodiment, when the rotary switch is rotated from the forward position to the stop position, the decoupling lever automatically triggers the motor assembly to briefly reverse once, thereby decoupling the motor output shaft from the working screw, which facilitates easy disassembly and removal of the juicing container. This design avoids the cumbersome steps of traditional rotary switch operation, which requires moving from the stop position to the reverse position and then back to the stop position to reset, thus improving user experience and ease of operation.

[0009] In the above technical solution, more preferably, the switch body is rotatably disposed in the switch mounting hole of the main housing of the food processing appliance, and has multiple elastic claws on the side facing the control board for engaging in the switch mounting hole and achieving rotation limit.

[0010] In the above technical solution, preferably, an annular flange is provided at the end of the switch mounting hole away from the switch body. An arc-shaped strip is provided on the end face of the annular flange facing the switch body. The arc-shaped strip has an arc-shaped groove recessed towards the inner wall of the switch mounting hole. The reset spring is pre-compressed within the arc-shaped groove. One end of the arc-shaped strip is connected to the inner wall of the switch mounting hole, and a gap is provided between the other end and the inner wall of the switch mounting hole. This gap is adapted to the wall thickness of the switch body. This design effectively prevents axial movement of the switch body, improving rotational flexibility and operational feel.

[0011] In the above technical solution, preferably, a notch is provided on the side wall of the switch body, the arc length of the notch being greater than the arc length of the arc-shaped strip. The cylindrical wall of the switch body on one side of the notch can enter or leave the arc-shaped groove along the gap, facilitating the compression or release of the return spring. This embodiment provides a simple and highly reliable return spring compression mechanism.

[0012] In the above technical solution, preferably, the forward rotation pressure rod, the reverse rotation pressure rod and the decoupling pressure rod are arranged on the end face of the annular enclosure, and the forward rotation pressure rod, the reverse rotation pressure rod and the decoupling pressure rod are respectively connected to the central sleeve through reinforcing ribs to enhance the structural strength and service life.

[0013] In the above technical solution, preferably, the elastic claw is provided on the end face of the annular enclosure, and the elastic claw has strip grooves on both sides of its root. The strip grooves penetrate the side wall of the annular enclosure, and the inner wall of the annular enclosure has strip ribs corresponding to the elastic claw to enhance the strength and elasticity of the claw.

[0014] As can be seen from the above technical solution, the rotary switch and control board of the food processing appliance provided by this utility model solve the problems of complex wiring structure of existing control switches, software-based implementation of forward and reverse functions, and poor reliability and stability. Compared with the prior art, this utility model has the following beneficial effects: A control board is provided for the rotary switch, requiring only four external connection wires, which simplifies the wiring process and makes assembly and replacement convenient. In addition, the rotary switch is equipped with a forward and reverse lever, and the control board is equipped with a forward and reverse micro switch, thus forming a mechanical trigger structure, which ensures stable control function and reliable use.

[0015] In another preferred embodiment, during the shutdown operation, the rotary switch automatically triggers a reverse micro switch as it rotates from the forward position to the stop position. This eliminates the need to manually rotate the rotary switch from the stop position to the reverse position and then back to the stop position, making operation more convenient and improving user experience and ease of use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced and explained below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main unit of the food processing appliance in this application; Figure 2 for Figure 1 A schematic diagram of the assembly of the rotary switch on the main unit of the food processing appliance shown. Figure 3 for Figure 1 A half-sectional view of the main unit of the food processing appliance shown. Figure 4 This is a schematic diagram of the rotary switch in this application; Figure 5 for Figure 4 The diagram shows the exploded structure of the rotary switch. Figure 6 for Figure 4 An exploded view of the rotary switch shown from the left. Figure 7 This is the circuit schematic diagram of the control board in this application; Figure 8 This is a schematic diagram of the switch body in this application; Figure 9 for Figure 2 Enlarged view of part A in the image; Figure 10 for Figure 2 Enlarged view of part B in the image; Figure 11 This is a schematic diagram of the rotary switch in the stopped state in this application; Figure 12 This is a schematic diagram of the rotary switch during forward rotation in this application; Figure 13 This is a schematic diagram of the rotary switch during reverse operation in this application; Figure 14 This is a schematic diagram of the rotary switch in the decoupling state during shutdown in this application.

[0018] Figures 1-14 The correspondence between the parts is as follows: Host 1; Main unit housing 100, motor assembly 200, rotary switch 300; Switch body 310, control board 320, reset spring 330; Forward gear 301, reverse gear 302, stop gear 303; Forward rotation pressure bar 311, reverse rotation pressure bar 312, decoupling pressure bar 313, elastic claw 314, annular enclosure 316, center sleeve 317, strip groove 318, strip rib 319; Switch mounting hole 110, annular flange 111, arc strip 112, arc groove 113, gap 114, notch 315. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To provide a clearer explanation and description of the technical solution and implementation method of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below.

[0021] It should be noted that the directional terms such as "inner" and "outer", "front" and "back" and "left" and "right" in this article are based on the product's usage status. Obviously, the use of these directional terms does not limit the scope of protection of this solution.

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, this application provides a food processing appliance, including a main unit 1. The main unit 1 includes a main unit housing 100 and a motor assembly 200 disposed within the main unit housing 100. A switch mounting hole 110 is provided on the side wall of the main unit housing 100, and a rotary switch 300 is rotatably disposed within the switch mounting hole 110. The rotary switch 300 is configured with a forward rotation position 301, a reverse rotation position 302, and a stop position 303, used to control the motor assembly 200 to rotate forward, reverse, or stop. The forward rotation position 301 and the reverse rotation position 302 are located on either side of the stop position 303.

[0023] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the rotary switch 300 includes a switch body 310 and a control board 320. The control board 320 is fixed inside the main housing 100 and is disposed opposite to the switch body 310.

[0024] The control board 320 is used to couple with the switch of the food processing appliance to control the forward, reverse and stop rotation of the motor assembly of the food processing appliance. The switch of the food processing appliance can be a rotary switch or other types of switches, such as rocker switches or multiple independent push-button switches.

[0025] Please see Figure 7 The control board 320 in this application has AC input terminals L and N and positive and negative DC output terminals DC+ and DC-. The AC input terminals are used to connect to the input power supply of the food processing appliance, and the positive and negative DC output terminals DC+ and DC- are used to provide drive power to the motor assembly of the food processing appliance. The control board 320 is equipped with a forward micro switch K1, a reverse micro switch K2, and a rectifier module BR.

[0026] The common terminal of the forward micro switch K1 and the reverse micro switch K2 is connected to the positive output terminal DC+ and the negative output terminal DC- through the output filter unit. The normally open contacts of the forward micro switch K1 and the reverse micro switch K2 are interconnected, and the normally closed contacts are interconnected.

[0027] The AC input pins of the rectifier module BR are connected to the AC input terminals L and N respectively through the input filtering and step-down unit. The normally closed and normally open contacts of the forward micro switch K1 are connected to the positive and negative output pins of the rectifier module BR respectively.

[0028] Both the output filtering unit and the input filtering and step-down unit are conventional technologies in this field, and will not be described in detail here.

[0029] Forward micro switch K1 and reverse micro switch K2 are used to couple with the trigger mechanism on the rotary switch to realize the forward, reverse and stop control functions of the motor assembly.

[0030] The rotary switch 300 with the aforementioned control board has a modular design where the switch body 310 and the control board 320 require only four external connection wires, simplifying the wiring process of the rotary switch 300 and making assembly and replacement convenient.

[0031] The switch body 310 is cylindrical, and a forward rotation lever 311, a reverse rotation lever 312, and a decoupling lever 313 are provided on the side facing the control board 320. The forward rotation lever 311, the reverse rotation lever 312, and the decoupling lever 313 are arranged on the same circumference along the circumference of the switch body 310, and are configured such that when the switch body 310 is rotated, the forward rotation lever 311 and the reverse rotation lever 312 are correspondingly coupled to the forward rotation micro switch K1 and the reverse rotation micro switch K2 to control the forward rotation, reverse rotation, and stop of the motor assembly of the food processing appliance.

[0032] The decoupling lever 313 is specifically designed for food processing appliances where the motor output shaft and the working screw are connected by a helical structure. For food processing appliances that do not use a helical structure connection, the decoupling lever 313 can be omitted.

[0033] The rotary switch 300 also includes a reset spring 330, which is configured such that when the switch body 310 is rotated from the stop position 303 to the reverse position 302 under the action of external force, the reset spring 330 is compressed and stores energy, and after the external force is removed from the switch body 310, the reset spring 330 releases energy, driving the switch body 310 to reset from the reverse position 302 to the stop position 303.

[0034] like Figure 8 As shown, the switch body 310 has multiple elastic claws 314 arranged circumferentially on the side facing the control board 320, which are used to lock into the switch mounting hole 110 of the main housing 100, so that the switch body 310 can rotate within the switch mounting hole 110.

[0035] Specifically, such as Figure 2 , Figure 9As shown, an annular flange 111 is provided at the end of the inner wall of the switch mounting hole 110 away from the switch body 310. An arc-shaped strip 112 is provided on the end face of the annular flange 111 facing the switch body 310. An arc-shaped groove 113 is provided on the side of the arc-shaped strip 112 facing the inner wall of the switch mounting hole 110. The return spring 330 is disposed in the arc-shaped groove 113. One end of the arc-shaped strip 112 is connected to the inner wall of the switch mounting hole 110, and a gap 114 is provided between the other end and the inner wall of the switch mounting hole 110. The gap 114 is adapted to the wall thickness of the switch body 310.

[0036] The switch body 310 is inserted into the switch mounting hole 110, and the elastic claw 314 is locked on the rear end face of the annular flange 111 for limiting the position. The switch body 310 can rotate within the switch mounting hole 110.

[0037] Please see Figure 8 , Figure 10 A notch 315 is provided on the side wall of the switch body 310. The arc length of the notch 315 is greater than the arc length of the arc strip 112. The cylindrical wall of the switch body 310 on one side of the notch 315 can enter or leave the arc groove 113 along the gap 114, thereby compressing or relaxing the reset spring 330.

[0038] In this design, the return spring 330 is pre-compressed and installed within the arc-shaped groove 113, preventing it from easily dislodging and ensuring reliable positioning. The return spring 330 enters or exits the arc-shaped groove 113 through the gap 114 between the cylindrical wall of the switch body 310 and the inner wall of the mounting hole, compressing or releasing the return spring 330. The gap 114 then limits the position of the cylindrical wall of the switch body 310. This spring compression mechanism is simple in structure and highly reliable.

[0039] An annular retaining wall 316 is also provided inside the cylindrical wall of the switch body 310, and a central sleeve 317 is provided inside the annular retaining wall 316. The annular retaining wall 316 and the central sleeve 317 are respectively coaxially arranged with the cylindrical wall of the switch body 310. The height of the central sleeve 317 is less than the height of the cylindrical wall of the switch body 310. The height difference between the two is equal to the thickness of the annular flange 111, and the outer wall surface of the annular retaining wall 316 is adapted to the inner hole of the annular flange 111.

[0040] In traditional designs, the rotary switch 300 and the switch mounting hole 110 use a cylindrical surface mating structure, which has insufficient axial limit and a large gap between the cylindrical surfaces. This causes radial oscillation during rotation, making it prone to eccentric jamming and resulting in a poor user experience.

[0041] like Figure 10As shown, in the rotational fit structure between the switch body 310 and the switch mounting hole 110 in this application, the elastic claw 314 and the cylindrical wall end face of the switch body 310 are respectively clamped on the two sides of the annular flange 111, forming an axial bidirectional rotational limiting structure, which prevents the switch body 310 from axially moving. The outer wall surface of the annular retaining 316 and the inner wall surface of the annular flange 111 form a circumferential rotational fit surface. Since the length of the fit surface is short, the fit clearance can be set to be small, so radial sway is not easy to occur, avoiding rotational jamming. The switch body 310 rotates flexibly, has high reliability, good feel, and high user experience.

[0042] For example Figure 8 As shown, the forward rotation pressure rod 311, the reverse rotation pressure rod 312, and the decoupling pressure rod 313 are respectively disposed on the end face of the annular enclosure 316. The forward rotation pressure rod 311, the reverse rotation pressure rod 312, and the decoupling pressure rod 313 are respectively connected to the outer wall of the central sleeve 317 through reinforcing ribs to improve the strength and deformation resistance of the forward rotation pressure rod 311, the reverse rotation pressure rod 312, and the decoupling pressure rod 313, thereby improving reliability and extending service life.

[0043] An elastic claw 314 is disposed on the end face of the annular barrier 316. Strip grooves 318 are provided on both sides of the root of the elastic claw 314, penetrating the side wall of the annular barrier 316, thus forming the elastic mechanism of the elastic claw 314. Strip ribs 319 are provided on the inner wall of the annular barrier 316 at locations corresponding to the elastic claw 314 to improve the strength of the elastic claw 314.

[0044] In some food processing appliances, the motor output shaft and the working screw are connected by a helical structure, providing downward tension to the working screw and maintaining a reliable connection with the motor assembly. In existing food processing appliances, the forward and reverse control knobs are located on either side of the stop position. After the forward pressing operation is completed, the motor output shaft and the working screw become tightly engaged, making disassembly difficult. Therefore, after pressing, the motor assembly can be briefly reversed before stopping, thus decoupling the motor output shaft from the working screw and facilitating the disassembly of the juicing container. However, achieving this requires rotating the knob across the stop position to the reverse position and then back to the stop position, which is cumbersome.

[0045] Therefore, utilizing the above-mentioned technology, this application provides a shutdown decoupling method for food processing electrical appliances, the method comprising the following steps: Rotating the knob switch to the forward position triggers the forward micro switch on the control panel to achieve continuous forward operation; rotating the knob switch to the reverse position triggers the reverse micro switch on the control panel to achieve inching operation in reverse; the forward and reverse positions are located on either side of the stop position. The rotary switch has a decoupling trigger structure on its rotation stroke from the forward position to the stop position. During the rotation of the rotary switch from the forward position to the stop position, the decoupling trigger structure triggers a reverse micro switch once.

[0046] The above method involves the decoupling trigger structure activating a reverse microswitch once during the rotation of the knob switch from the forward position to the stop position. This causes the motor assembly to briefly reverse, automatically triggering a brief reverse rotation of the motor assembly during the shutdown process. This decouples the motor output shaft from the working screw, allowing for easy removal of the juicing container. This design eliminates the need to manually rotate the knob switch from the stop position to the reverse position and then back to the stop position. The automatic activation of the reverse microswitch during shutdown improves ease of operation and enhances user experience. Furthermore, this method ensures that the reverse rotation is not missed, avoiding the hassle of forgetting to reverse and the resulting difficulty in disassembling the juicing container.

[0047] like Figure 11-14 As shown, the rotary switch 300 provided in this application operates on the following principle: Stopped state Figure 11 As shown, the forward micro switch K1 is triggered by the forward triggering mechanism 201, and the reverse micro switch K2 is triggered by the reverse triggering mechanism 202. When the rotary switch 300 is in the stop position 303, the forward pressure rod 311, the reverse pressure rod 312, and the decoupling pressure rod 313 are all separated from the forward triggering mechanism 201 and the reverse triggering mechanism 202. The forward micro switch K1 and the reverse micro switch K2 are both in the open state, the motor assembly is de-energized, and the food processing electrical appliance is in the stop state.

[0048] Forward rotation operation as follows Figure 11 As shown, when the rotary switch 300 is rotated clockwise to the forward position 301, the forward rotation lever 311 presses against the trigger mechanism of the forward rotation micro switch K1, closing the forward rotation micro switch K1 and causing the motor assembly to rotate forward. The reverse rotation lever 312 and the decoupling lever 313 are in the neutral position, and the reverse rotation micro switch K2 is open.

[0049] Reverse operation such as Figure 12 As shown, when the rotary switch 300 is rotated counterclockwise to the reverse position 302, the reverse lever 312 presses against the trigger mechanism of the reverse micro switch K2, closing the reverse micro switch K2 and reversing the motor assembly. The forward lever 311 and decoupling lever 313 are in the neutral position, and the forward micro switch K1 is open. During the counterclockwise rotation of the rotary switch 300, the return spring 330 is compressed and stores energy. After the rotary switch 300 is released, the return spring 330 drives the rotary switch 300 to rotate clockwise, resetting it to the stop position 303.

[0050] Forward rotation and shutdown operation as follows Figure 13As shown, during the counterclockwise rotation of the rotary switch 300 to the stop position 303, the decoupling lever 313 presses against the trigger mechanism of the reverse micro switch K2 once, closing the reverse micro switch K2 and causing the motor assembly to reverse once. Continuing to rotate the rotary switch 300 counterclockwise, the decoupling lever 313 disengages from the trigger mechanism of the reverse micro switch K2, causing the reverse micro switch K2 to open and the motor assembly to stop. This continues until the rotary switch 300 is rotated counterclockwise to the stop position 303. At this point, the forward lever 311, reverse lever 312, and decoupling lever 313 are all separated from the forward micro switch K1 and the reverse micro switch K2. Both the forward micro switch K1 and the reverse micro switch K2 are in the open state, the motor assembly is de-energized and stops, and the food processing appliance is in a stopped state.

[0051] Therefore, in this application, the decoupling trigger structure triggers a reverse microswitch once during the rotation of the knob switch from the forward position to the stop position. This causes the motor assembly to briefly reverse, meaning that during the stop operation, the motor assembly is automatically triggered to briefly reverse once, decoupling the motor output shaft from the working screw and allowing for easy disassembly of the juicing container. This design eliminates the need for the knob switch to move from the stop position to the reverse position and then back to the stop position, simplifying the operation process and making it more convenient.

[0052] Based on the above description of specific embodiments, the rotary switch and control board of the food processing appliance provided by this utility model have the following advantages compared with the prior art: First, the control board of the rotary switch is equipped with a forward micro switch, a reverse micro switch and a rectifier module. The forward and reverse micro switches are used to couple with the trigger lever on the rotary switch. When used with the rotary switch, they realize the forward and reverse control function of the motor assembly. The modular design simplifies the wiring and assembly process of the rotary switch, making assembly and replacement convenient.

[0053] Secondly, as the rotary switch is turned from the forward position to the stop position, the motor assembly is automatically triggered to briefly reverse once, decoupling the motor output shaft from the working screw, allowing for easy removal of the juicing container. This eliminates the need to manually operate the rotary switch across the stop position to the reverse position and then back to the stop position, making operation more convenient and improving user experience and comfort.

[0054] Third, the return spring compression mechanism has a simple structure and high reliability.

[0055] Finally, it should be noted that the terms "comprising," "including," or any other variations thereof as used herein are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a…" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] This utility model is not limited to the above-described preferred embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.

Claims

1. A control plate for coupling with a switch of a food processing appliance to control a motor assembly of the food processing appliance to run forward, run reverse and stop, characterized in that, The control board has AC input terminals and positive and negative DC output terminals. The AC input terminals are used to connect to an input power supply, and the positive and negative DC output terminals are used to provide drive power to the motor assembly of the food processing appliance. The control board is equipped with: A forward micro switch and a reverse micro switch are provided, with their common terminals connected to the positive and negative DC output terminals, respectively. The normally open contacts of the forward micro switch and the reverse micro switch are connected to each other, and their normally closed contacts are also connected to each other. The rectifier module has its AC input pins connected to the AC input terminals, and the normally closed and normally open contacts of the forward micro switch are connected to the positive and negative output pins of the rectifier module, respectively.

2. A rotary switch configured with a forward rotation stage, a reverse rotation stage, and a stop stage arranged in a circumferential direction, the forward rotation stage and the reverse rotation stage being located on both sides of the stop stage, characterized by, The rotary switch includes a switch body and a control board. The control board is the control board as described in claim 1, which is fixed inside the main housing of the food processing appliance and is disposed opposite to the switch body. The switch body is cylindrical, and a forward rotation lever and a reverse rotation lever are provided on the side facing the control board. The switch body is configured such that when the switch body is rotated, the forward rotation lever and the reverse rotation lever are coupled to the forward rotation micro switch and the reverse rotation micro switch respectively. The reset spring is configured to compress and store energy during the process of the switch body rotating from the stop position to the reverse position under the action of external force, and to reset from the reverse position to the stop position after the external force is removed from the switch body.

3. The rotary switch according to claim 2, characterized in that, The switch body is also provided with a decoupling lever on the side facing the control board, and is configured such that: during the process of the switch body rotating to the stop position, the decoupling lever presses against and disengages from the triggering mechanism of the reverse micro switch.

4. The rotary switch according to claim 3, wherein The switch body is rotatably mounted in a switch mounting hole on the side wall of the main housing of the food processing appliance. The side of the switch body facing the control board has multiple elastic claws arranged circumferentially for locking in the switch mounting hole and rotating within the switch mounting hole.

5. The rotary switch according to claim 4, wherein An annular flange is provided at the end of the switch mounting hole away from the switch body. An arc-shaped strip is provided on the end face of the annular flange facing the switch body. The arc-shaped strip is provided with an arc-shaped groove that is recessed towards the inner wall of the switch mounting hole. The reset spring is pre-compressed and disposed in the arc-shaped groove. One end of the arc-shaped strip is connected to the inner wall of the switch mounting hole, and a gap is provided between the other end and the inner wall of the switch mounting hole. The gap is adapted to the thickness of the cylindrical wall of the switch body.

6. The rotary switch according to claim 5, wherein A notch is provided on the side wall of the switch body. The arc length of the notch is greater than the arc length of the arc strip. The cylindrical wall of the switch body on one side of the notch can enter or leave the arc groove along the gap to compress or relax the reset spring.

7. The rotary switch according to claim 6, characterized in that, An annular baffle is also provided inside the cylindrical wall of the switch body, and a central sleeve is provided inside the annular baffle. The annular baffle and the central sleeve are respectively coaxially arranged with the cylindrical wall of the switch body. The height of the annular baffle is greater than the height of the cylindrical wall of the switch body, and the height difference between the two is equal to the thickness of the annular flange. The outer wall surface of the annular baffle is adapted to the inner hole of the annular flange.

8. The rotary switch according to claim 7, wherein The forward rotation pressure rod, the reverse rotation pressure rod, and the decoupling pressure rod are respectively disposed on the end face of the annular enclosure. The forward rotation pressure rod, the reverse rotation pressure rod, and the decoupling pressure rod are respectively connected to the outer wall of the central sleeve through reinforcing ribs.

9. The rotary switch of claim 8, wherein The elastic claw is disposed on the end face of the annular enclosure. A strip groove is provided on both sides of the root of the elastic claw. The strip groove is disposed through the side wall of the annular enclosure. A strip rib is disposed on the inner wall of the annular enclosure corresponding to the elastic claw.

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