A food processing machine

Abstract

This utility model belongs to the field of kitchen appliance technology and discloses a food processor, including a main unit, a cup body installed on the main unit, a cup lid covering the cup body, a variable frequency motor and a control board installed in the main unit. A micro switch is installed in the main unit, and the control board includes a power module, a main control module, a variable frequency motor drive module, and an energy storage module. The food processor also includes a cover fixed to the outside of the cup body, which, together with the cup body, forms a vertically extending mounting cavity. A movable connecting rod passes through the mounting cavity, and the micro switch is located below the connecting rod. The connecting rod is pressed by the cup lid to trigger the micro switch to close. When the cup lid is opened, the connecting rod returns to its original position, causing the micro switch to open and disconnecting the power supply to the power module. The food processor provided by this utility model can achieve a strong power-off effect when the lid is opened, improving safety. Simultaneously, the power-off process of the variable frequency motor includes a dual protection mechanism of soft shutdown and hard shutdown, effectively preventing damage to the micro switch or machine burn-out.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a food processing machine. Background Technology

[0002] The new national standard GB / T4706.19-2024 requires food processors such as soymilk makers and blenders with soymilk-making functions to effectively stop the motor when the lid is opened, meaning a forced power cut-off to the motor is required. Traditional food processors, to achieve this safety design, use low-voltage switches such as reed switches or Hall effect sensors. Software (chip) detects the disconnection of these switches before shutting off the motor. This electronic disconnection of the motor circuit using low-voltage signals does not meet the requirements of the new national standard.

[0003] Of course, to directly meet the national standard requirement of cutting off high voltage when the cover is opened, those skilled in the art would think of directly connecting the high voltage switch to the main circuit of the motor. When the cover is opened, the high voltage switch disconnects the neutral / live wire to achieve a forced power cut-off. However, the main circuit is a high voltage of 220V. Disconnecting the neutral / live wire of the high voltage switch will cause great damage to the entire main circuit and components. In particular, the electric spark generated at the moment of opening and closing of the high voltage switch will cause abnormal conduction, affecting the reliability of the control circuit and the service life of key components.

[0004] Furthermore, high-voltage switches are large, while in traditional food processors, microswitches are typically mounted on the top of the handle of the mixing cup, with a magnet on the lid to mate with the microswitch. The space for triggering the switch between the lid and handle is extremely limited. Given the limited space for traditional triggering, increasing the triggering space is virtually impossible. Modifying the mold and cup structure would require significant changes, incurring high costs for structural upgrades, occupying a large amount of space, and inevitably affecting the cup's design. Even waterproofing of the trigger switch would require additional design. Therefore, improvements are costly and time-consuming, and for products already in mass production, the R&D and manufacturing investment required to meet the new national standards is substantial. Utility Model Content

[0005] This utility model provides a food processing machine that aims to achieve the function of cutting off the high voltage when the lid is opened in an existing food processing machine in a low-cost and short improvement cycle. At the same time, it solves the technical problem that using a high voltage switch to directly cut off the neutral / live wire to achieve a strong power cut-off when the lid is opened will cause electrical sparks and abnormal damage to components.

[0006] The technical solution adopted in this utility model is as follows:

[0007] This utility model provides a food processing machine, including a main unit, a cup body installed on the main unit, a cup lid covering the cup body, a variable frequency motor and a control board disposed within the main unit. A micro switch is installed within the main unit. The control board includes a power module, a main control module, and a variable frequency motor drive module. The power module is connected to the power supply terminal of the variable frequency motor drive module via the micro switch. The power supply terminal of the variable frequency motor drive module is also connected to an energy storage module. The energy storage module is used to provide delayed power to the variable frequency motor drive module when the micro switch is open. The power module also provides power to the variable frequency motor drive module via the micro switch. The micro switch is connected to the control signal terminal of the main control module. The main control module is used to stop outputting signals to the variable frequency motor drive module to control the variable frequency motor to stop rotating when the micro switch is turned on. The food processing machine also includes a cover fixed to the outside of the cup body. The cover and the cup body form a vertically extending mounting cavity. A movable connecting rod passes through the mounting cavity. The micro switch is located below the connecting rod. The connecting rod is pressed by the cup lid to trigger the micro switch to close. When the cup lid is opened, the connecting rod resets, causing the micro switch to open and disconnecting the power supply to the power module.

[0008] The food processing machine provided by this utility model includes a power supply module, a main control module, and a variable frequency motor drive module on the control board. The power supply module is connected to the power supply terminal of the variable frequency motor drive module via a micro switch. The power supply terminal of the variable frequency motor drive module is also connected to an energy storage module. The energy storage module is used to provide delayed power to the variable frequency motor drive module when the micro switch is open. The power supply module is also connected to the control signal terminal of the main control module via the micro switch. The main control module is used to stop outputting signals to the variable frequency motor drive module to control the variable frequency motor to stop rotating when the micro switch is open. Therefore, when the user opens the cup lid, the connecting rod returns to its original position without being pressed by the lid, the microswitch is physically disconnected, the power supply module directly supplies power to the variable frequency motor drive module, and the main control module actively stops the signal. Although the microswitch cuts off the main power supply to the power module, the power supply terminal of the variable frequency motor drive module is still briefly powered by the energy storage module (such as an electrolytic capacitor). The stored energy in the energy storage module can maintain the power outage buffer operation of the drive module, avoiding mechanical shock to the motor and burnout of the microswitch caused by sudden power failure, thus forming a soft shutdown buffer. When the energy storage module gradually depletes its power, the power supply voltage of the variable frequency motor drive module drops below the minimum operating threshold, the drive circuit is completely shut down, and the motor enters a no-power state, i.e., a hard shutdown.

[0009] The power module, main control module, variable frequency motor drive module, and energy storage module of the aforementioned control board work together to achieve a dual protection mechanism for the variable frequency motor's power-off process, including both soft and hard shutdown. This eliminates the need for a high-voltage switch to directly disconnect the motor's main circuit, effectively preventing microswitch wear and electrical sparks. Compared to traditional high-voltage switches located on the main circuit, the microswitch is smaller and requires less installation space, reducing unnecessary structural modifications to already mass-produced food processing machines. This allows for low-cost and short-cycle implementation of the function of disconnecting high-voltage power upon opening the lid in existing food processing machines. Furthermore, the microswitch is installed inside the main unit, forming a vertically extending mounting cavity with the cup body using a cover. A movable connecting rod passes through this cavity, achieving efficient use of the mounting cavity on the side of the cup body, maximizing space utilization. Simultaneously, it effectively protects the connecting rod, providing waterproofing and moisture protection, extending its lifespan and improving sliding reliability, ensuring reliable microswitch triggering.

[0010] In summary, the microswitch and control board structure of this invention not only achieve a forced power-off effect upon opening the lid, meeting the requirements of the new national standard and improving safety, but also incorporate a dual protection mechanism of soft and hard shutdown during the power-off process of the variable frequency motor. This prevents electrical sparks and component damage caused by directly cutting off the neutral / live wires to achieve a forced power-off upon opening the lid. Furthermore, the efficient use of the mounting cavity allows for the realization of the function of immediately cutting off the power upon opening the lid in existing food processing machines at low cost and with a short improvement cycle.

[0011] In a preferred embodiment, the mounting cavity is further provided with a liquid level detection plate that abuts against the outer wall of the cup body, and the connecting rod is arranged separately from the liquid level detection plate.

[0012] By setting up a liquid level detection plate, the liquid level in the cup can be detected in the air, achieving the effects of preventing overflow and dry burning. At the same time, the liquid level detection plate and the connecting rod can share the installation cavity space, making full use of space and reducing the size of the cup. On this basis, by arranging the connecting rod and the liquid level detection plate separately, interference between the connecting rod and the liquid level detection plate during movement is avoided. This ensures smooth movement of the connecting rod and also avoids collisions that could cause displacement of the liquid level detection plate. It also ensures effective triggering of the micro switch and accurate detection by the liquid level detection plate.

[0013] In a preferred embodiment, the outer wall of the cup body is provided with a mounting surface and a limiting groove arranged parallel to the mounting surface. The limiting groove extends vertically, the connecting rod is movably disposed in the limiting groove, and the liquid level detection plate abuts against the mounting surface.

[0014] By setting an mounting surface, the liquid level detection plate can abut against the mounting surface, ensuring the flatness of the installation, thereby improving the uniformity and accuracy of the detection. By setting a limiting groove, which extends vertically, the connecting rod is movably set in the limiting groove, realizing the avoidance between the connecting rod and the liquid level detection plate, and also guiding the movement of the connecting rod, avoiding the movement jamming problem caused by the connecting rod deviating.

[0015] In a preferred embodiment, the outer wall of the cup body is provided with a partition rib, and the liquid level detection plate and the connecting rod are respectively disposed on both sides of the partition rib.

[0016] By setting up isolation ribs, the liquid level detection plate and the connecting rod are directly separated using a simple structure, thus avoiding interference between the movement of the connecting rod and the liquid level detection plate.

[0017] In a preferred embodiment, the inner side of the cover is provided with a vertically extending guide groove, and the connecting rod is movably disposed within the guide groove.

[0018] By setting a vertically extending guide groove on the inner side of the cover, the connecting rod is movably set in the guide groove. When installing the connecting rod, the connecting rod and the cover can be assembled into one piece first, and then the connecting rod is installed on the cup body along with the cover, realizing modular assembly, which is simple to install, improves assembly efficiency, and facilitates disassembly and maintenance.

[0019] In a preferred embodiment, the cover is a handle, which includes a cover plate and a grip portion protruding from the outside of the cover plate, and the cover plate and the outer wall of the cup body form an installation cavity.

[0020] By incorporating a handle into the cover, the handle facilitates the user's grip and placement of the cup. At the same time, the mounting cavity formed by the cover plate of the handle and the outer wall of the cup accommodates the connecting rod, achieving structural reuse and simplifying the cup structure.

[0021] In a preferred embodiment, the cover is a cup shell that is fitted around the periphery of the cup.

[0022] By setting the cover as a cup shell that is fitted around the outside of the cup body, on the one hand, the cup shell forms a heat-proof isolation effect, and on the other hand, when the cup shell and the cup body are fitted together, a fitting gap is required. Therefore, an annular gap is generated between the two, forming an installation cavity, realizing the reuse of the cup shell structure and simplifying the cup structure.

[0023] In a preferred embodiment, the connecting rod includes a main body segment extending vertically along the outer wall of the cup, a transition segment bent from the bottom end of the main body segment toward the axis of the cup, and a trigger segment connected below the transition segment. The trigger segment is closer to the axis of the cup than the main body segment, and the micro switch is located below the trigger segment.

[0024] By setting a transition section that bends from the bottom of the main body towards the axis of the cup, the trigger section is closer to the axis of the cup than the main body. The micro switch is set below the trigger section, which is close to the axis of the cup. Therefore, the micro switch itself has a certain volume. By placing it close to the axis of the cup, the radial dimension of the cup can be avoided from increasing, thus achieving a compact arrangement of space and miniaturization of the cup, making it easy to pick up.

[0025] In a preferred embodiment, the connecting rod further includes a reinforcing plate connected between the trigger section and the transition section, the reinforcing plate being arranged laterally, and the trigger section being fixed to the lower side of the reinforcing plate.

[0026] By setting a reinforcing plate, the connection strength between the trigger section and the transition section is strengthened, avoiding the easy breakage of the connecting rod due to angle changes, and realizing reliable triggering of the micro switch.

[0027] In a preferred embodiment, the cup lid is provided with a swivel buckle, the top of the mounting cavity is provided with a swivel groove, and the top of the connecting rod protrudes into the swivel groove. After the cup lid is closed, the swivel buckle and the swivel groove screw together and press against the connecting rod to trigger the micro switch. Preferably, the connecting rod is fitted with a return spring to push the connecting rod upward to return to its original position after the cup lid is opened.

[0028] The swivel joint engages with the groove and presses against the connecting rod to trigger the micro switch. On one hand, the swivel joint and groove of the lid ensure a stable fit between the lid and the cup body, preventing lid displacement during operation. On the other hand, the top of the connecting rod protrudes from the groove and is protected, preventing accidental activation of the micro switch when the user wipes the top of the lid, etc. The micro switch is only triggered when the swivel joint and groove are fully engaged, improving safety. A reset spring ensures the lid-opening connecting rod returns to its original position, causing the micro switch to disengage and achieving a forced power cut-off for the variable frequency motor. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the food processing machine in Embodiment 1 of this utility model;

[0031] Figure 2 This is a circuit diagram of the food processing machine in Embodiment 1 of this utility model;

[0032] Figure 3 This is a schematic diagram of the installation of the connecting rod in Embodiment 1 of this utility model;

[0033] Figure 4 This is an exploded structural diagram of the cup body in Embodiment 1 of this utility model;

[0034] Figure 5 This is a schematic diagram of the fit between the cup body and the connecting rod in Embodiment 1 of this utility model;

[0035] Figure 6 This is an exploded structural diagram of the host computer in Embodiment 1 of this utility model;

[0036] Figure 7 This is a cross-sectional view of the food processing machine in Embodiment 1 of this utility model;

[0037] Figure 8 This is a partial enlarged view of the food processing machine in Embodiment 1 of this utility model;

[0038] Figure 9 This is a structural diagram of the food processing machine in Embodiment 2 of this utility model;

[0039] Figure 10 This is a structural diagram of the cup body of the food processing machine in Embodiment 3 of this utility model.

[0040] List of components and reference numerals:

[0041] 10. Main unit; 11. Base; 12. Panel; 13. Fixing ring; 14. Shock-absorbing pad; 15. Transmission rod; 16. Reset component; 17. Switch bracket; 20. Cup body; 201. Inner cup; 202. Outer cup; 203. Single-layer cup; 21. Heating tube; 22. Liquid level detection plate; 23. Cover component; 231. Handle; 2311. Cover plate; 2312. Grip part; 232. Cup body shell; 24. Cup holder; 30. Cup lid; 31. Rotary buckle; 40. Limiting groove; 41. Mounting surface; 50. Variable frequency motor; 60. Control board; 70. Micro switch; 80. Connecting rod; 90. Return spring. Detailed Implementation

[0042] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0044] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] In one embodiment, this utility model provides a food processing machine, such as... Figure 1 As shown, the system includes a main unit 10, a cup body 20 mounted on the main unit 10, a cup lid 30 covering the cup body 20, a variable frequency motor 50 and a control board 60 installed inside the main unit 10, and a micro switch 70 installed inside the main unit 10. Figure 2As shown, the control board 60 includes a power supply module, a main control module, and a variable frequency motor 50 drive module. The power supply module is connected to the power supply terminal of the variable frequency motor 50 drive module via a micro switch 70. The power supply terminal of the variable frequency motor 50 drive module is also connected to an energy storage module, which is used to delay power supply to the variable frequency motor 50 drive module when the micro switch 70 is open. The power supply module is also connected to the control signal terminal of the main control module via the micro switch 70. The main control module is used to stop outputting signals to the variable frequency motor 50 drive module to control the variable frequency motor 50 to stop rotating when the micro switch 70 is open. The food processing machine also includes a cover fixed to the outside of the cup body 20. The cover and the cup body 20 enclose a vertically extending mounting cavity. A movable connecting rod 80 passes through the mounting cavity. The micro switch 70 is located below the connecting rod 80. The connecting rod 80 is pressed by the cup lid 30 to trigger the micro switch 70 to close. When the cup lid 30 is opened, the connecting rod 80 resets, causing the micro switch 70 to open and disconnecting the power supply to the power supply module.

[0048] The food processing machine provided by this utility model includes a power supply module, a main control module, and a variable frequency motor 50 drive module on the control board 60. The power supply module is connected to the power supply terminal of the variable frequency motor 50 drive module via a micro switch 70. The power supply terminal of the variable frequency motor 50 drive module is also connected to an energy storage module, which provides delayed power to the variable frequency motor 50 drive module when the micro switch 70 is open. The power supply module is also connected to the control signal terminal of the main control module via the micro switch 70. The main control module stops outputting signals to the variable frequency motor 50 drive module when the micro switch 70 is open, thereby controlling the variable frequency motor 50 to stop rotating. Therefore, when the user opens the cup lid 30, the connecting rod 80 is reset due to the pressure from the cup lid 30, the micro switch 70 is physically disconnected, the direct power supply from the power module to the variable frequency motor 50 drive module is disconnected, and the main control module actively stops the signal. Although the micro switch 70 cuts off the main power supply of the power module, the power supply terminal of the variable frequency motor 50 drive module is still briefly powered by the energy storage module (such as an electrolytic capacitor). The stored energy of the energy storage module can maintain the power failure buffer operation of the drive module, avoiding mechanical shock to the motor and burnout of the micro switch 70 due to sudden power failure, thus forming a soft shutdown buffer. When the power of the energy storage module is gradually depleted, the power supply voltage of the variable frequency motor 50 drive module drops below the minimum operating threshold, the drive circuit is completely shut down, and the motor enters a no-power state, i.e., a strong power hard shutdown.

[0049] The power module, main control module, variable frequency motor drive module, and energy storage module of the aforementioned control board work together to achieve a dual protection mechanism for the variable frequency motor's power-off process, including both soft and hard shutdown. This eliminates the need for a high-voltage switch to directly disconnect the motor's main circuit, effectively preventing microswitch wear and electrical sparks. Compared to traditional high-voltage switches located on the main circuit, the microswitch is smaller and requires less installation space, reducing unnecessary structural modifications to already mass-produced food processing machines. This allows for low-cost and short-cycle implementation of the function of disconnecting high-voltage power upon opening the lid in existing food processing machines. Furthermore, the microswitch is installed inside the main unit, forming a vertically extending mounting cavity with the cup body using a cover. A movable connecting rod passes through this cavity, achieving efficient use of the mounting cavity on the side of the cup body, maximizing space utilization. Simultaneously, it effectively protects the connecting rod, providing waterproofing and moisture protection, extending its lifespan and improving sliding reliability, ensuring reliable microswitch triggering.

[0050] In summary, the micro switch 70 and control board 60 of this invention not only achieve a strong power-off effect when the lid is opened, meeting the requirements of the new national standard and improving safety, but also incorporate a dual protection mechanism of soft and hard shutdown during the power-off process of the variable frequency motor 50. This prevents electrical sparks and component damage caused by directly cutting off the neutral / live wires to achieve a strong power-off when the lid is opened. Furthermore, the mounting cavity is utilized efficiently, thus achieving the function of immediately cutting off the strong power when the lid is opened in a food processing machine at low cost and with a short improvement cycle.

[0051] More specifically, the energy storage module includes a capacitor. After the microswitch 70 is opened, the capacitor discharges and temporarily supplies power to the power supply terminal of the variable frequency motor 50 drive module, maintaining the IGBT (Insulated Gate Bipolar Transistor) at its normal operating supply voltage (saturation voltage). After the microswitch 70 is opened, the signal input terminal of the main control module receives the level change signal (I / O port signal change) and immediately stops sending drive signals to the variable frequency motor 50 drive module (the variable frequency motor 50 stops driving). This ensures that the main control module stops sending drive signals, resulting in a soft shutdown of the variable frequency motor 50 before the power supply terminal of the variable frequency motor 50 drive module is de-energized, i.e., a hard shutdown follows.

[0052] It should be noted that this utility model does not limit the specific structure of the cup body 20; the cup body 20 can be a hot cup equipped with a heating tube 21, or a cold cup without a heating tube 21. Furthermore, this utility model does not limit the structure of the covering member; for example:

[0053] Example 1, such as Figure 1-8As shown, the cover 23 is a handle 231, which includes a cover plate 2311 and a gripping part 2312 protruding from the outside of the cover plate. The cover plate and the outer wall of the cup body 20 enclose each other to form an installation cavity. More specifically, the cup body 20 is a double-layered cup, including an inner cup 201 and an outer cup 202 sleeved on the outside of the inner cup 201. The cover plate and the outer wall of the outer cup 202 enclose each other to form an installation cavity.

[0054] By adopting a handle 231 for the cover 23, the handle 231 facilitates the user's grip and placement of the cup body 20. At the same time, the mounting cavity formed by the cover plate of the handle 231 and the outer wall of the cup body 20 is used to accommodate the connecting rod 80, thereby realizing the reuse of the structure and simplifying the structure of the cup body 20.

[0055] like Figure 3 , 4 As shown, preferably, the mounting cavity is also provided with a liquid level detection plate 22 that abuts against the outer wall of the cup body 20, and the connecting rod 80 is arranged separately from the liquid level detection plate 22.

[0056] By setting up a liquid level detection plate 22, the liquid level inside the cup body 20 can be detected in the air, achieving the effects of preventing overflow and dry burning. At the same time, the liquid level detection plate 22 and the connecting rod 80 can share the installation cavity space, making full use of space and reducing the size of the cup body 20. On this basis, by arranging the connecting rod 80 and the liquid level detection plate 22 separately, interference between the connecting rod 80 and the liquid level detection plate 22 is avoided when the connecting rod 80 moves. This ensures the smooth movement of the connecting rod 80 and also avoids collisions that could cause displacement of the liquid level detection plate 22. It also ensures the effective triggering of the micro switch 70 and the accurate detection of the liquid level detection plate 22.

[0057] The separation method between the connecting rod 80 and the liquid level detection plate 22 can be optionally as follows: Figure 5 As shown, the outer wall of the cup body 20 is provided with a mounting surface 41 and a limiting groove 40 arranged parallel to the mounting surface. The limiting groove 40 extends vertically, and the connecting rod 80 is movably disposed in the limiting groove 40. The liquid level detection plate 22 abuts against the mounting surface.

[0058] By setting an installation surface, the liquid level detection plate 22 can abut against the installation surface, ensuring the flatness of the installation, thereby improving the uniformity and accuracy of the detection. By setting a limiting groove 40, which extends vertically, the connecting rod 80 is movably set in the limiting groove 40, realizing the avoidance between the connecting rod 80 and the liquid level detection plate 22, and also guiding the movement of the connecting rod 80, avoiding the movement jamming problem caused by the displacement of the connecting rod 80.

[0059] Of course, in other embodiments, the separation method of the connecting rod 80 and the liquid level detection plate 22 may also be that the outer wall of the cup body 20 is provided with a separation rib, and the liquid level detection plate 22 and the connecting rod 80 are respectively arranged on both sides of the separation rib.

[0060] By setting up isolation ribs, the liquid level detection plate 22 and the connecting rod 80 are directly separated using a simple structure, thus avoiding interference between the movement of the connecting rod 80 and the liquid level detection plate 22.

[0061] Alternatively, the inner side of the cover 23 is provided with a vertically extending guide groove, and the connecting rod 80 is movably disposed in the guide groove.

[0062] By providing a vertically extending guide groove on the inner side of the cover 23, the connecting rod 80 is movably disposed in the guide groove. When installing the connecting rod 80, the connecting rod 80 can be assembled with the cover 23 to form a whole, and then the connecting rod 80 is installed on the cup body 20 along with the cover 23, realizing modular assembly, which is easy to install, improves assembly efficiency, and facilitates disassembly and maintenance.

[0063] like Figure 3 , 4 As shown, preferably, the connecting rod 80 includes a main body section 81 extending vertically along the outer wall of the cup body 20, a transition section 82 bent from the bottom end of the main body section toward the axis of the cup body 20, and a trigger section 83 connected below the transition section. The trigger section is closer to the axis of the cup body 20 than the main body section, and the micro switch 70 is located below the trigger section.

[0064] By setting a transition section that bends from the bottom of the main body towards the axis of the cup body 20, the trigger section is closer to the axis of the cup body 20 than the main body. The micro switch 70 is set below the trigger section, which is close to the axis of the cup body 20. Therefore, the micro switch 70 itself has a certain volume. By bringing it close to the axis of the cup body 20, for example, by extending the transition section towards the cup base 24 at the bottom of the cup body, the radial dimension of the cup body 20 can be prevented from increasing, thus achieving a compact arrangement of space and miniaturization of the cup body 20, making it easy to pick up.

[0065] More preferably, such as Figure 5 As shown, the connecting rod 80 also includes a reinforcing plate 84 connecting the trigger section and the transition section. The reinforcing plate is arranged laterally, and the trigger section is fixed to the lower side of the reinforcing plate. By setting the reinforcing plate, the connection strength between the trigger section and the transition section is strengthened, avoiding the possibility of the connecting rod 80 breaking easily due to angle changes, and realizing reliable triggering of the micro switch 70.

[0066] like Figure 3 , 4 As shown, the cup lid 30 has a protrusion with a swivel buckle 31. A groove is provided at the top of the mounting cavity, and the top of the connecting rod 80 protrudes into the groove. After the cup lid 30 is closed, the swivel buckle and the groove screw together and press against the connecting rod 80 to trigger the micro switch 70. Preferably, the connecting rod 80 is fitted with a return spring 90 to push the connecting rod 80 upwards to return it to its original position after the cup lid 30 is opened.

[0067] The screw fastener and the groove engage to press against the connecting rod 80, triggering the micro switch 70. On one hand, the engagement of the screw fastener and groove on the cup lid 30 ensures a stable seal between the lid 30 and the cup body 20, preventing displacement of the lid 30 during operation. On the other hand, the top of the connecting rod 80 protrudes into the groove for protection, preventing accidental activation of the micro switch 70 when the user wipes the top of the cover 23, etc. The micro switch 70 is only triggered when the screw fastener and groove are fully engaged, improving safety. A reset spring 90 ensures the lid-opening connecting rod 80 returns to its original position, causing the micro switch 70 to disengage and effectively cutting off power to the variable frequency motor 50.

[0068] Of course, it is understandable that in other embodiments, the cup lid 30 and the cup body 20 may be fitted together from top to bottom, and a sealing ring is fitted on the side wall of the cup lid 30 to achieve a sealing effect and an interference fit between the cup lid 30 and the cup body 20.

[0069] To achieve more reliable triggering of the micro switch 70 by the linkage 80 and more sensitive power cut-off upon opening the cover, a more preferable approach is, as follows: Figure 6 , 7 As shown in Figure 8, the main unit includes a base 11, a panel 12, a retaining ring 13, and a shock-absorbing pad 14, which together form a housing chamber to accommodate the motor and the micro switch. The housing chamber also houses a transmission rod 15, a reset element 16 for resetting the transmission rod, and a switch bracket 17 for fixing the micro switch. When the cup lid 30 is closed, the connecting rod 80 moves downward, pushing the transmission rod 15 downward and triggering the micro switch 70 to close. When the cup lid 30 is opened, the connecting rod 80 is reset upward via the reset spring 90, the transmission rod 15 is reset upward via the reset element 16, and the micro switch 70 is opened.

[0070] Example 2, as Figure 9 As shown, this embodiment differs from Embodiment 1 in that the cover 23 is a cup body shell 232 fitted around the outer periphery of the cup body 20, and the side wall of the cup body 20 and the side wall of the cup body shell 232 enclose a mounting cavity. A movable connecting rod 80 passes through the mounting cavity, and a micro switch 70 is located below the connecting rod 80. The connecting rod 80 is pressed by the cup lid 30 to trigger the micro switch 70 to close. When the cup lid 30 is opened, the connecting rod 80 resets, causing the micro switch 70 to open and disconnecting the power supply to the power module.

[0071] By setting the cover 23 as the outer shell of the cup body 20 that is sleeved on the outer periphery of the cup body 20, on the one hand, the outer shell of the cup body 20 forms a heat-proof isolation effect, and on the other hand, when the outer shell of the cup body 20 and the cup body 20 are fitted together, a fitting gap is required. Therefore, an annular gap is generated between the two, forming an installation cavity, realizing the reuse of the outer shell structure of the cup body 20 and simplifying the structure of the cup body 20.

[0072] Example 3, as Figure 10As shown, this embodiment is similar to Embodiment 1 in that the cover 23 is still a handle 231. The difference is that the cup body 20 is a single-layer cup 203, and the handle 231 includes a cover plate and a grip portion protruding from the outside of the cover plate. The cover plate and the outer wall of the cup body 20 form an installation cavity. A movable connecting rod 80 passes through the installation cavity. A micro switch 70 is located below the connecting rod 80. The connecting rod 80 is pressed by the cup lid 30 to trigger the micro switch 70 to close. When the cup lid 30 is opened, the connecting rod 80 returns to its original position, causing the micro switch 70 to open and disconnecting the power supply to the power module.

[0073] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0074] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0075] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A food processing machine, comprising a main unit, a cup body installed on the main unit, a cup lid covering the cup body, a variable frequency motor and a control board disposed within the main unit, characterized in that, The host is equipped with a micro switch. The control board has a power module, a main control module, and a variable frequency motor drive module. The power module is connected to the power supply terminal of the variable frequency motor drive module through the micro switch. The power supply terminal of the variable frequency motor drive module is also connected to an energy storage module. The energy storage module is used to supply power to the variable frequency motor drive module for a delay when the micro switch is open. The power module is also connected to the control signal terminal of the main control module through the micro switch. The main control module is used to stop outputting signals to the variable frequency motor drive module to control the variable frequency motor to stop rotating when the micro switch is open. The food processing machine also includes a cover fixed to the outside of the cup body. The cover and the cup body form a vertically extending mounting cavity. A movable connecting rod passes through the mounting cavity. The micro switch is located below the connecting rod. The connecting rod is pressed by the cup lid to trigger the micro switch to close. When the cup lid is opened, the connecting rod resets, causing the micro switch to open and disconnecting the power supply to the power module.

2. The food processing machine according to claim 1, characterized in that, The mounting cavity is also provided with a liquid level detection plate that abuts against the outer wall of the cup body, and the connecting rod is arranged separately from the liquid level detection plate.

3. A food processing machine according to claim 2, characterized in that, The outer wall of the cup body is provided with a mounting surface and a limiting groove arranged parallel to the mounting surface. The limiting groove extends vertically, the connecting rod is movably disposed in the limiting groove, and the liquid level detection plate abuts against the mounting surface.

4. A food processing machine according to claim 2, characterized in that, The outer wall of the cup body is provided with a partition rib, and the liquid level detection plate and the connecting rod are respectively arranged on both sides of the partition rib.

5. A food processing machine according to claim 1, characterized in that, The inner side of the cover is provided with a vertically extending guide groove, and the connecting rod is movably disposed within the guide groove.

6. A food processing machine according to claim 1, characterized in that, The cover is a handle, which includes a cover plate and a gripping part protruding from the outside of the cover plate. The cover plate and the outer wall of the cup body form an installation cavity.

7. A food processing machine according to claim 1, characterized in that, The cover is a cup shell that is fitted around the outside of the cup.

8. A food processing machine according to claim 1, characterized in that, The connecting rod includes a main body segment extending vertically along the outer wall of the cup, a transition segment bent from the bottom end of the main body segment toward the axis of the cup, and a trigger segment connected below the transition segment. The trigger segment is closer to the axis of the cup than the main body segment, and the micro switch is located below the trigger segment.

9. A food processing machine according to claim 8, characterized in that, The connecting rod also includes a reinforcing plate connected between the trigger section and the transition section. The reinforcing plate is arranged laterally, and the trigger section is fixed to the lower side of the reinforcing plate.

10. A food processing machine according to claim 1, characterized in that, The cup lid is provided with a swivel buckle, and the top of the mounting cavity is provided with a swivel groove. The top of the connecting rod protrudes into the swivel groove. After the cup lid is closed, the swivel buckle and the swivel groove screw together and press against the connecting rod to trigger the micro switch.

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