A food processor

Abstract

The utility model belongs to kitchen appliance technical field discloses a kind of food processing machines, including host computer, cup body installed in host computer, cup cover is combined in cup body, frequency conversion motor and control panel are set in host computer, host computer includes support part and enclosure part, microswitch is installed in the inner chamber of enclosure part, cup cover opens and closes to switch the opening and closing state of microswitch;Control panel is equipped with power module, main control module, frequency conversion motor drive module, energy storage module.The food processing machine provided by the utility model can realize the effect of opening cover and strong power-off, meet the requirements of new national standard, and improve the safety in use.Meanwhile, the power-off process of frequency conversion motor includes soft shutdown and hard shutdown double protection mechanism, thereby effectively preventing microswitch damage or burning machine problem.Microswitch is set in the inner chamber of enclosure part instead of cup body, on the basis of ensuring the good cooperation of microswitch and cup cover, simplifying cup body structure, facilitating user flexible taking and placing.

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 top of the handle of the mixing jar, with a magnet on the lid to mate with the microswitch. The space for triggering the switch between the lid and handle is very limited, making it extremely difficult to improve or upgrade the switch structure within such a small space. This makes it very difficult to convert a low-voltage switch into a high-voltage switch to cut off the high voltage when the lid is opened in products based on older standards, given the limited space. Additionally, the microswitch's placement in the mixing jar requires complex coupling signal connections between the mixing jar and the main unit, further complicating the structure. Utility Model Content

[0005] This utility model provides a food processing machine that, while improving safety by cutting off the power when the lid is opened to stop the motor, 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 would cause electrical sparks and abnormal damage to components. It also solves the technical difficulty that traditional high-voltage switches are large and difficult to improve within the limited triggering space.

[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 in the main unit. The main unit includes a support part supported below the cup body and a baffle part located on one side of the support part and protruding upward. A micro switch is installed in the inner cavity of the baffle part. The opening and closing of the cup lid switches the open and closed state of the micro switch.

[0008] The control board includes a power supply module, a main control module, and a variable frequency motor drive module. The power supply 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 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.

[0009] The food processing machine provided by this utility model optimizes the main unit structure. The main unit includes a support part and a baffle part located on one side of the support part and protruding upwards. The support part supports the cup body while the inner cavity of the baffle part provides sufficient installation space for the micro switch, making full use of the internal space of the main unit and improving the space utilization rate of the main unit. The baffle part protrudes upwards to approach the cup lid, thereby ensuring that the micro switch can form a good fit with the cup lid, so that the opening and closing of the cup lid switches the open and closed state of the micro switch. The trigger path of the micro switch is short, which can further eliminate the need for an additional transmission trigger structure between the cup lid and the micro switch, simplifying the cup body structure, making it easier to reduce the weight of the cup body, and making it easier for users to handle. Based on the optimized host structure, a power module, a main control module, and a variable frequency motor drive module are installed on the control board. The power module is connected to the power supply terminal of the variable frequency motor drive module via a microswitch. 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 microswitch is open. The power module is also connected to the control signal terminal of the main control module via the microswitch. 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 microswitch is open. Therefore, when the user opens the cup lid, the microswitch is physically disconnected, the direct power supply from the power module to the variable frequency motor drive module is cut off, and the main control module actively stops the signal. Although the microswitch cuts off the main power supply of 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 of the energy storage module can maintain the power-off 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's power is gradually depleted, 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 of the high-voltage circuit.

[0010] In summary, the microswitch and control board structure of this invention not only achieve a strong power-off effect when the cover 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. This effectively prevents microswitch wear and electrical sparks. Compared to traditional high-voltage switches installed on the main circuit, the microswitch is smaller in size, and it makes reasonable use of the inner cavity of the enclosure as installation space, resulting in a compact and simple structure. Furthermore, the microswitch is located in the inner cavity of the enclosure rather than on the cup body, which shortens the triggering time of the microswitch, improves the reliability and sensitivity of the microswitch's state switching, and simplifies the cup body structure, making it convenient for users to easily place and remove.

[0011] In a preferred embodiment, the top of the enclosure extends to the side of the cup lid, the micro switch is mounted on the top of the enclosure, and the cup lid is provided with a detection magnet that senses and engages with the micro switch.

[0012] By extending the top of the enclosure to the side of the cup lid, a lateral restraint on the cup body can be formed. Alternatively, it can be used to create a vertical operating screen for flexible user operation. A detection magnet is installed on the cup lid, and a microswitch is mounted on the top of the enclosure close to the cup lid. This ensures that the microswitch is sensitively triggered when the cup lid is fully closed, thereby cutting off the high-voltage power when the lid is opened and stopping the variable frequency motor. Furthermore, the sensing interaction between the detection magnet and the microswitch is independent and simple, requiring no additional linkages or other structures for triggering, further simplifying the overall machine structure.

[0013] In a preferred embodiment, the micro switch is a reed switch; or, the micro switch includes a stationary contact and a spring with a moving contact, wherein a sensing magnet that is magnetically repelled by the detection magnet is disposed on the spring.

[0014] The microswitch with the above structure can achieve sensitive triggering of the reed switch by using a detection magnet, thereby realizing the strong shutdown control of the variable frequency motor when the cover is opened. It has a simple structure, small size, and sensitive triggering. The spring-type structure has a sensing magnet on it. The spring is driven to move by the repulsion between the sensing magnet and the detection magnet, ensuring reliable triggering and strong anti-interference.

[0015] In a preferred embodiment, a movable connecting rod is installed in the inner cavity of the enclosure, the top end of the connecting rod extends out of the enclosure, the micro switch is located below the connecting rod, and after the cup lid is closed, it presses against the connecting rod to move downward to trigger the micro switch to close. The connecting rod is fitted with a return spring so that after the cup lid is opened, it pushes the connecting rod upward to reset and open the micro switch.

[0016] By installing a connecting rod inside the enclosure, the cup lid, after being closed, presses against the connecting rod to trigger the micro switch to close, achieving mechanical triggering of the micro switch. This provides high reliability and improves the user's feel when closing and opening the cup lid, allowing the user to intuitively confirm the status of the micro switch. A reset spring ensures the opening connecting rod returns to its original position, causing the micro switch to open and achieving a forced power cut-off for the variable frequency motor.

[0017] Whether triggered by a detection magnet or a linkage, the micro switch can achieve a strong power cut-off to the variable frequency motor when the cup lid is opened, meeting the requirements of the new national standard and improving safety.

[0018] In a preferred embodiment, the top of the enclosure is provided with a downwardly recessed groove, the top of the connecting rod protrudes from the groove, and the cup cover is provided with a trigger rib inserted from top to bottom into the groove. The trigger rib presses against the connecting rod to trigger the micro switch to close.

[0019] By providing a groove at the top of the enclosure, the top of the connecting rod protrudes into the groove. Therefore, the groove provides a protective shield for the connecting rod, preventing accidental pressing of the connecting rod while the user is wiping the enclosure, which could lead to false triggering of the microswitch. Only when the lid is closed, the trigger rib inserts into the groove from top to bottom, precisely applying force to the top of the connecting rod and ensuring accurate switch operation. Simultaneously, the groove also provides guidance and limitation for the movement of the connecting rod, allowing for smooth up-and-down movement and preventing jamming.

[0020] In a preferred embodiment, the top end of the enclosure is provided with a swivel groove, the top end of the connecting rod protrudes from the swivel groove, and the cup cover is provided with a trigger rib that rotates and engages with the swivel groove. The trigger rib presses against the connecting rod to trigger the micro switch to close.

[0021] By setting a swivel groove at the top of the enclosure, the trigger rib of the cup lid engages with the swivel groove to achieve a stable fit between the cup lid and the cup body, preventing the cup lid from shifting during operation. At the same time, the top of the connecting rod protrudes into the swivel groove to be protected, preventing accidental activation of the micro switch when the user wipes the main unit, etc. The micro switch can only be triggered when the trigger rib and the swivel groove are properly engaged, thus improving safety.

[0022] In a preferred embodiment, the micro switch includes a first switch and a second switch connected in parallel, the cup body includes a first cup body and a second cup body that are replaced and installed on the host, the cup lid includes a first cup lid that covers the first cup body and a second cup lid that covers the second cup body, the first switch is triggered by the first cup lid, and the second switch is triggered by the second cup lid.

[0023] Furthermore, one of the first switch and the second switch is a mechanical switch triggered by a linkage, and the other is a magnetic switch triggered by a detection magnet.

[0024] By setting up a first switch and a second switch in parallel, and replacing the first cup body and the second cup body installed on the host, the first cup lid and the second cup lid corresponding to the first cup body and the second cup body can be triggered and cooperate with the first switch and the second switch respectively. When any one of the switches is triggered, the cup lid can be detected to be in position and the power can be cut off when the lid is opened.

[0025] By differentiating the first and second switches—one being a mechanical switch triggered by a linkage and the other a magnetic switch triggered by a detection magnet—the detection of different cup types is simultaneously achieved.

[0026] In a preferred embodiment, the enclosure extends upward along the side wall of the cup body, and a liquid level detection plate for detecting the liquid level in the cup body is also installed in the inner cavity of the enclosure.

[0027] While installing the micro switch in the inner cavity of the enclosure, the liquid level detection plate and the micro switch share the inner cavity of the enclosure, thus making full use of the space and realizing the detection of the liquid level in the cup without air contact.

[0028] In a preferred embodiment, a voltage regulator module and a level conversion module are further provided between the micro switch and the control signal terminal of the main control module.

[0029] By incorporating a voltage regulator module, during the initial discharge phase of the energy storage module, the voltage regulator briefly maintains stability at the control signal terminal of the main control module, ensuring that the main control module reliably detects changes in switch status and preventing malfunctions caused by sudden voltage fluctuations. Furthermore, a level conversion module enables signal adaptation, ensuring compatibility with microswitches and main control modules of different voltage levels. Attached Figure Description

[0030] 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:

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

[0032] Figure 2 This is a schematic diagram of the food processing machine in Embodiment 1 of this utility model from another angle;

[0033] Figure 3 This is a circuit diagram of the food processing machine in Embodiment 1 of this utility model;

[0034] Figure 4 This is a schematic diagram of the food processing machine in Embodiment 2 of this utility model;

[0035] Figure 5 This is a schematic diagram of the cooperation between the micro switch and the connecting rod in Embodiment 2 of this utility model.

[0036] List of components and reference numerals:

[0037] 10. Main unit; 101. Support unit; 102. Enclosure unit; 20. Cup body; 21. Heating tube; 22. Liquid level detection plate; 30. Cup lid; 31. Detection magnet; 40. Water tank; 50. Variable frequency motor; 60. Control board; 70. Micro switch; 71. First switch; 72. Second switch; 73. Switch bracket; 80. Connecting rod; 90. Return spring. Detailed Implementation

[0038] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] like Figure 1-3 As shown, in one embodiment, this utility model provides a food processing machine, including a main unit 10, a cup body 20 installed on the main unit 10, a cup lid 30 covering the cup body 20, a variable frequency motor 50 and a control board 60 disposed within the main unit 10. The main unit 10 includes a support portion 101 supported below the cup body 20 and a baffle portion 102 located on one side of the support portion 101 and protruding upward. A micro switch 70 is installed in the inner cavity of the baffle portion 102, and the cup lid 30 is opened and closed to switch the open and closed state of the micro switch 70. Figure 3 As shown, the control board 60 is equipped with a power supply module, a main control module, and a variable frequency motor drive module. The power supply module is connected to the power supply terminal of the variable frequency motor drive module through a micro switch 70. 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 70 is open. The power supply module is also connected to the control signal terminal of the main control module through the micro switch 70. The main control module is used to stop outputting signals to the variable frequency motor drive module to control the variable frequency motor 50 to stop rotating when the micro switch 70 is open.

[0044] The food processing machine provided by this utility model optimizes the structure of the main unit 10. The main unit 10 includes a support part 101 and a baffle part 102 located on one side of the support part 101 and protruding upward. The support part 101 supports the cup body 20, and a micro switch 70 is installed in the inner cavity of the baffle part 102, thereby making full use of the internal space of the main unit 10 and improving the space utilization rate of the main unit 10. The baffle part 102 protrudes upward to approach the cup lid 30, thereby ensuring that the micro switch 70 can form a good fit with the cup lid 30, so that the opening and closing of the cup lid 30 can switch the opening and closing state of the micro switch 70. At the same time, it avoids the complexity of the cup body 20 structure caused by setting the micro switch 70 in the cup body 20, simplifies the structure of the cup body 20, makes it easier to reduce the weight of the cup body 20, and makes it easier for users to handle. Based on the optimized host 10 structure, a power supply module, a main control module, and a variable frequency motor drive module are set on the control board 60. The power supply module is connected to the power supply terminal of the variable frequency motor drive module through a micro switch 70. 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 70 is open. The power supply module is also connected to the control signal terminal of the main control module through the micro switch 70. The main control module is used to stop outputting signals to the variable frequency motor drive module to control the variable frequency motor 50 to stop rotating when the micro switch 70 is open. Therefore, when the user opens the cup lid 30, the micro switch 70 is physically disconnected, the direct power supply from the power module to the variable frequency motor drive module is cut off, 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 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-off buffer operation of the drive module, avoiding mechanical shock to the motor and burnout of the micro switch 70 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 high-voltage hard shutdown.

[0045] It is important to emphasize that while some food processing machines utilize variable frequency motors in existing technologies, these motors require high-voltage switching transistors (IGBTs, MOSFETs, etc.) for driving. However, these transistors (or microswitches) have high requirements for drive voltage. The transistors are connected to the power supply terminal of the variable frequency motor (typically 15V). If the power supply terminal of the variable frequency motor drive module (typically 15V) is directly disconnected, a conduction abnormality will occur when the actual drive voltage is lower than the standard drive voltage. This will cause a sudden increase in transistor temperature, leading to transistor explosion or machine burnout, resulting in irreversible damage. Therefore, directly disconnecting the switching transistor at the variable frequency motor drive terminal to achieve a forced power cut is a solution commonly avoided by those skilled in the art due to concerns about transistor explosion or even complete machine damage.

[0046] In this application, through the cooperation of the power supply module, main control module, variable frequency motor drive module, and energy storage module of the control board, a dual protection mechanism of soft shutdown and hard shutdown is achieved during the power-off process of the variable frequency motor. Therefore, this application explicitly eliminates the aforementioned technical bias of those skilled in the art regarding forced shutdown microswitches, creatively proposes a strategy of directly shutting off the microswitch, and sets up a corresponding protection mechanism, thereby effectively avoiding the risk of tube explosion while achieving rapid and direct disconnection of high voltage.

[0047] In summary, the microswitch and control board structure of this invention not only achieve a strong power-off effect when the cover 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. This effectively prevents microswitch wear and electrical sparks. Compared to traditional high-voltage switches installed on the main circuit, the microswitch is smaller in size, and it makes reasonable use of the inner cavity of the enclosure as installation space, resulting in a compact and simple structure. Furthermore, the microswitch is located in the inner cavity of the enclosure rather than on the cup body, which shortens the triggering time of the microswitch, improves the reliability and sensitivity of the microswitch's state switching, and simplifies the cup body structure, making it convenient for users to easily place and remove.

[0048] More specifically, the energy storage module includes a capacitor. When the microswitch is opened, the capacitor discharges and temporarily supplies power to the power supply terminal of the variable frequency motor drive module, maintaining the IGBT (Insulated Gate Bipolar Transistor) at the power supply terminal of the drive module at its normal operating supply voltage (saturation voltage). When the microswitch 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 drive module (the variable frequency motor stops driving). This ensures that the main control module stops sending drive signals, resulting in a soft shutdown of the variable frequency motor before the power supply terminal of the variable frequency motor drive module is de-energized, i.e., a hard shutdown follows.

[0049] This utility model does not limit the specific structure of the enclosure part, such as Figure 1 , 2 As shown, in a preferred embodiment, the enclosure 102 is provided with a vertical operating panel to form an operating table, and the support 101 includes a first support platform supporting the cup body 20 and a second support platform supporting the water tank 40. The first support platform and the second support platform are side by side, and the cup body 20 and the water tank 40 are side by side. At the same time, the cup body 20 and the enclosure 102 are located on adjacent sides of the water tank 40, thereby making the overall size of the machine more square. Compared with the traditional food processing machine structure in which the operating table, cup body 20 and water tank 40 are arranged side by side from front to back, the span of the food processing machine from front to back is reduced, and the overall size of the machine is smaller.

[0050] In a preferred embodiment, a voltage regulator module and a level conversion module are further provided between the micro switch 70 and the control signal terminal of the main control module.

[0051] By incorporating a voltage regulator module, during the initial discharge phase of the energy storage module, the voltage regulator briefly maintains a stable voltage at the control signal terminal of the main control module, ensuring that the main control module reliably detects changes in the switch state and avoids malfunctions caused by sudden voltage fluctuations. A level conversion module is also included to achieve signal adaptation, ensuring compatibility with microswitches 70 and the main control module across different voltage levels.

[0052] This invention does not limit the triggering method of the micro switch, for example:

[0053] Example 1, such as Figure 1-3 As shown, in this embodiment, the micro switch is a magnetically controlled switch.

[0054] Specifically, the top of the retaining portion 102 extends to the side of the cup lid 30, a micro switch 70 is mounted on the top of the retaining portion 102, and the cup lid 30 is provided with a detection magnet 31 that engages with the micro switch 70. More preferably, the micro switch 70 is a reed switch.

[0055] Of course, in other embodiments, the micro switch 70 includes a stationary contact and a spring with a moving contact, and an induction magnet that is magnetically repelled by the detection magnet 31 is provided on the spring.

[0056] In this embodiment, by extending the top of the enclosure 102 to the side of the cup lid 30, a lateral restraint on the cup body 20 can be formed. It can also be used to create a vertical operating screen for flexible user operation. A detection magnet 31 is provided on the cup lid 30, and a micro switch 70 is installed on the top of the enclosure 102 close to the cup lid 30, ensuring that the micro switch 70 can be sensitively triggered when the cup lid 30 is closed, thereby cutting off the high-voltage power when the lid is opened and stopping the rotation of the frequency converter motor 50. Furthermore, the sensing cooperation between the detection magnet 31 and the micro switch 70 is independent and simple, requiring no additional linkage 80 or other structures for triggering, further simplifying the overall structure.

[0057] The microswitch 70 with the above structure can achieve sensitive triggering of the reed switch by using the detection magnet 31, thereby realizing the strong shutdown control of the variable frequency motor 50 when the cover is opened. It has a simple structure, small size, and sensitive triggering. It adopts a spring structure with a sensing magnet set on the spring. The spring is driven to move by the repulsion between the sensing magnet and the detection magnet 31, which is reliable and has strong anti-interference ability.

[0058] In this embodiment, two microswitches 70 are provided, including a first switch 71 and a second switch 72 connected in parallel. The cup body 20 includes a first cup body (e.g., a hot cup) and a second cup body (e.g., a cold cup) that are replaced and installed on the main unit 10. The cup lid 30 includes a first cup lid that covers the first cup body and a second cup lid that covers the second cup body. The first switch 71 is triggered by the first cup lid 30, and the second switch 72 is triggered by the second cup lid 30. Furthermore, the first switch 71 is a mechanical switch triggered by a connecting rod 80, and the second switch 72 is a magnetic switch triggered by a detection magnet.

[0059] By setting up a first switch 71 and a second switch 72 in parallel, and replacing the first cup body and the second cup body installed on the host 10, the first cup lid and the second cup lid corresponding to the first cup body and the second cup body can be triggered and cooperate with the first switch 71 and the second switch 72 respectively. When any one of the switches is triggered, the cup lid 30 can be detected to be in position and the corresponding opening of the lid can cut off the strong power.

[0060] By differentiating the first switch 71 and the second switch 72—one being a mechanical switch triggered by the connecting rod 80, and the other a magnetic switch triggered by the detection magnet 31—the detection of different cup types 20 is simultaneously achieved. For example, Figure 1 , Figure 2 This is a schematic diagram of the first cup body installed on the main unit. When the first cup body is installed, the detection magnet 31 on the lid of the first cup body is triggered by the corresponding microswitch 70 (first switch), realizing indirect detection of the first cup body and direct detection of the lid being closed. A connecting rod is not required on the side of the first cup body, thus reserving space for a liquid level detection plate. When the second cup body is installed on the main unit, the corresponding lid of the second cup body engages with the connecting rod, triggering the second switch, realizing indirect detection of the second cup body and direct detection of the lid being closed. Therefore, regardless of which cup body is installed on the main unit, a microswitch can be triggered to realize lid positioning detection and forced power cut-off when the lid is opened.

[0061] Of course, the food processing machine provided in this embodiment may optionally include only one cup body, namely the first cup body.

[0062] In addition, in this embodiment, a handle is provided on the side of the cup body, and a cavity for installing the liquid level detection plate is formed between the handle and the cup body to realize the detection of the liquid level in the cup body without air. The liquid level detection plate and the micro switch are located in the cup body and the main unit, respectively, so as to realize the rational use of the space of the whole machine and avoid the cup body structure becoming complicated due to their concentration in the cup body.

[0063] Of course, in other embodiments, the liquid level detection plate for detecting the liquid level in the cup body 20 can also optionally be disposed in the inner cavity of the enclosure portion 102, which extends upward along the side wall of the cup body 20.

[0064] While the micro switch 70 is installed in the inner cavity of the enclosure 102, the liquid level detection plate 22 and the micro switch 70 share the inner cavity of the enclosure 102, so as to make full use of the space and realize the detection of the liquid level in the cup 20 without air.

[0065] Example 2, as Figure 4 , 5 As shown, in this embodiment, the micro switch is driven by a linkage.

[0066] Specifically, a movable connecting rod 80 is installed inside the cavity of the enclosure 102. The top end of the connecting rod 80 extends out of the enclosure 102. A micro switch 70 is located below the connecting rod 80. After the cup lid 30 is closed, it presses against the connecting rod 80 to trigger the micro switch 70 to close. A return spring 90 is fitted onto the connecting rod 80 to push the connecting rod 80 upward to return it to its original position after the cup lid 30 is opened. For example, as... Figure 5 As shown, the main unit 10 is equipped with a switch bracket 73 for mounting a micro switch 70. The upper end of the reset spring 90 abuts against the connecting rod 80, and the lower end abuts against the switch bracket 73.

[0067] By installing a connecting rod 80 inside the cavity of the enclosure 102, the cup lid 30, after being closed, presses against the connecting rod 80 to trigger the micro switch 70 to close, thus achieving mechanical triggering of the micro switch 70. This provides high triggering reliability and improves the user's feel when closing and opening the cup lid 30, allowing the user to intuitively confirm the status of the micro switch 70. A return spring 90 ensures that the opening connecting rod 80 returns to its original position, causing the micro switch 70 to open and achieving a forced power cut-off for the variable frequency motor 50.

[0068] Understandably, whether the micro switch 70 is triggered by the detection magnet 31 or the linkage 80, it can achieve a strong power cut-off of the variable frequency motor 50 when the cup lid 30 is opened, meeting the requirements of the new national standard and improving the safety of use.

[0069] In this embodiment, the top of the enclosure 102 has a downwardly recessed groove, and the top of the connecting rod 80 protrudes into the groove. The cup lid 30 has a trigger rib that inserts downward into the groove. The trigger rib presses against the connecting rod 80 to trigger the micro switch 70 to close. By providing a groove at the top of the enclosure 102 and having the top of the connecting rod 80 protrude into the groove, the groove provides a protective shield for the connecting rod 80, preventing accidental pressing of the connecting rod 80 by the user while wiping the enclosure 102 of the main unit 10, which could lead to the micro switch 70 being falsely triggered. Only when the cup lid 30 is closed, the trigger rib inserts downward into the groove along with the cup lid 30, precisely applying force to the top of the connecting rod 80 to ensure accurate switch operation. At the same time, the groove also provides guidance and limitation for the movement of the connecting rod 80, allowing the connecting rod 80 to move smoothly up and down and preventing jamming.

[0070] Of course, in other embodiments, the top of the enclosure 102 is provided with a swivel groove, the top of the connecting rod 80 protrudes into the swivel groove, and the cup cover 30 is provided with a trigger rib that rotates and engages with the swivel groove. The trigger rib presses against the connecting rod 80 to trigger the micro switch 70 to close.

[0071] By setting a swivel groove at the top of the enclosure 102, on the one hand, the trigger rib of the cup lid 30 engages with the swivel groove to achieve a stable fit between the cup lid 30 and the cup body 20, preventing the cup lid 30 from shifting during operation. On the other hand, the top of the connecting rod 80 protrudes into the swivel groove to be shielded and protected, preventing accidental activation of the micro switch 70 when the user wipes the main unit 10, etc. The micro switch 70 can only be triggered when the trigger rib engages with the swivel groove, thus improving safety.

[0072] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0073] 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.

[0074] 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 main unit includes a support part supported below the cup body and a baffle part located on one side of the support part and protruding upward. A micro switch is installed in the inner cavity of the baffle part, and the cup lid is opened and closed to switch the open and closed state of the micro switch. The control board includes a power supply module, a main control module, and a variable frequency motor drive module. The power supply 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 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.

2. A food processor as claimed in claim 1, characterised in that The top of the enclosure extends to the side of the cup lid, the micro switch is installed on the top of the enclosure, and the cup lid is provided with a detection magnet that cooperates with the micro switch.

3. A food processor as claimed in claim 2, wherein The micro switch is a reed switch; Alternatively, the micro switch includes a stationary contact and a spring with a moving contact, and an inductive magnet that is magnetically repelled by the detection magnet is disposed on the spring.

4. The food processor of claim 1, wherein, The enclosure is equipped with a movable connecting rod, and the micro switch is located below the connecting rod. After the cup lid is closed, it presses against the connecting rod to move downward and trigger the micro switch to close. The connecting rod is fitted with a return spring so that after the cup lid is opened, it pushes the connecting rod upward to reset and open the micro switch.

5. A food processor as claimed in claim 4, wherein The top of the enclosure is provided with a downward recessed groove, the top of the connecting rod protrudes into the groove, and the cup cover is provided with a trigger rib inserted from top to bottom into the groove. The trigger rib presses against the connecting rod to trigger the micro switch to close.

6. A food processor as claimed in claim 4, wherein The top of the enclosure is provided with a swivel groove, the top of the connecting rod protrudes from the swivel groove, and the cup cover is provided with a trigger rib that rotates and engages with the swivel groove. The trigger rib presses against the connecting rod to trigger the micro switch to close.

7. The food processor of claim 1, wherein, The micro switch includes a first switch and a second switch connected in parallel. The cup body includes a first cup body and a second cup body that are replaced and installed on the host. The cup lid includes a first cup lid that covers the first cup body and a second cup lid that covers the second cup body. The first switch is triggered by the first cup lid, and the second switch is triggered by the second cup lid.

8. A food processor as claimed in claim 7, characterised in that One of the first switch and the second switch is a mechanical switch triggered by a linkage, and the other is a magnetic switch triggered by a detection magnet.

9. The food processor of claim 1, wherein, The enclosure extends upward along the side wall of the cup body, and a liquid level detection plate for detecting the liquid level in the cup body is also installed in the inner cavity of the enclosure.

10. The food processor of claim 1, wherein, A voltage regulator module and a level conversion module are also provided between the micro switch and the control signal terminal of the main control module.

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