A food processor

Abstract

This utility model belongs to the field of kitchen appliance technology and discloses a food processing machine, including a main unit, a motor, a mounting bracket, a connecting rod vertically mounted on the mounting bracket, and a safety switch located below the connecting rod and triggered by the connecting rod. The safety switch includes a spring with a moving contact and a circuit board with a stationary contact. One end of the spring is fixed to the circuit board, and the other end is suspended above the stationary contact, so that the moving contact corresponds to the position above the stationary contact. The circuit board is placed horizontally on the front side of the mounting bracket and abuts against the mounting bracket. The mounting bracket also includes a drain hole located behind the spring and extending through the front and back, with the drain hole extending upward from the top surface of the circuit board. The safety switch in this application is small in size, compact in structure, and saves installation space. By improving the mounting bracket, water accumulation on the circuit board is prevented, the circuit board has good waterproof performance, and no additional sealing structure is required, which would increase sealing costs and complicate assembly, thus ensuring stable operation of the main unit.

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] Traditional meat grinders typically have buttons, linkages, and safety switches on the main unit. The safety switch usually consists of a housing with a stationary contact and a spring-loaded contact protruding from the top of the housing. When the user presses the button, the linkage moves down, pressing against the spring-loaded contact. This contact makes contact with the stationary contact, completing the circuit and starting the motor to drive the mixing blades in the mixing cup to grind the meat. However, traditional safety switch housings are relatively large. For meat grinders requiring dual-speed adjustment, two housings are needed, increasing costs and requiring more installation space, thus increasing the overall size of the main unit.

[0003] Patent CN208909912U also discloses a meat grinder. This design features a microswitch with a first-position spring corresponding to the first-position drive lever and a second-position spring corresponding to the second-position drive lever. The two springs are mounted on a plate serving as a carrier, with two exposed stationary contacts on the carrier, triggered by the two springs. Compared to traditional safety switches, this type of microswitch eliminates the need for an external housing structure, resulting in a simpler, more compact structure and lower cost. However, for this type of machine, the main unit inevitably has a shaft hole corresponding to the motor output end and mating holes corresponding to the latches of the first and second-position buttons. Therefore, these openings pose a risk of water ingress into the main unit.

[0004] To prevent water from entering the main unit, existing technologies typically include warnings such as "Do not wash the main unit" in product manuals and promote the product by advising users not to rinse or soak the main unit. However, in actual use, it's unavoidable that food spills into the shaft hole area, causing dirt to accumulate. This leads users to rinse the main unit instead of simply wiping it, resulting in water entering the main unit. When water enters the main unit through the output port or button contact hole, the exposed static contacts accumulate around them and the spring contacts, posing a short circuit risk. This can damage the main unit after powering on and shorten its lifespan.

[0005] Of course, existing technologies also use sealing rings to seal the perforations in the main unit to prevent water from entering. However, the main water ingress points in the main unit are the motor output shaft hole and the mating holes of the buttons. These holes need to avoid the rotating output head or the movable button latches. If sealing rings are used, it will not only increase costs, but also cause operational interference and other problems such as inconvenience in use. Utility Model Content

[0006] This utility model provides a food processing machine that, while simplifying the safety switch structure and without increasing sealing costs or ensuring smooth operation of the main unit, solves the technical problem of short circuits caused by water accumulation near the safety switch affecting the service life of the main unit.

[0007] The technical solution adopted in this utility model is as follows:

[0008] This utility model provides a food processing machine, including a main unit. The main unit contains a motor, a mounting bracket, a connecting rod vertically mounted on the mounting bracket, and a safety switch located below the connecting rod and triggered by the connecting rod. The safety switch includes a spring with a moving contact and a circuit board with a stationary contact. One end of the spring is fixed to the circuit board, and the other end is suspended above the stationary contact, so that the moving contact corresponds to the position above the stationary contact. The circuit board is horizontally placed on the front side of the mounting bracket and abuts against the mounting bracket. The mounting bracket also includes a drain hole located behind the spring and extending through the front and back of the spring, with the drain hole extending upward from the top surface of the circuit board.

[0009] This utility model provides a food processing machine in which the safety switch includes a spring with a moving contact and a circuit board with a stationary contact. Compared with traditional safety switches with a housing, this design is simpler, saves installation space, and makes the main unit structure more compact. By placing the circuit board horizontally against the front of the mounting bracket, a stable assembly of the circuit board and the mounting bracket is achieved. When the connecting rod moves downward, it presses against the spring, allowing the moving contact to abut against the stationary contact of the circuit board, thus connecting the main unit circuit. The mounting bracket also includes a drain hole located behind the spring and extending through it from the top surface of the circuit board upwards. Therefore, even if water gets into the main unit due to improper operation, the water near the circuit board and the spring contacts will drain more directly and quickly from the drain hole behind the spring contacts, preventing water accumulation on the circuit board when the main unit is installed correctly or upright. This reduces the risk of water accumulation on the circuit board and prevents short circuits and damage when the machine is turned on. It also prevents prolonged water accumulation on the circuit board from causing soaking and damage, extending the lifespan of both the circuit board and the main unit. Furthermore, this food processor prevents water accumulation on the circuit board simply by modifying the mounting bracket. The circuit board has excellent waterproofing and eliminates the need for additional sealing structures, reducing sealing costs and assembly complexity. Compared to traditional mounting brackets, it reduces the amount of material used in the bracket, resulting in lower overall machine costs and ensuring stable operation of the main unit.

[0010] In a preferred embodiment, the spring includes an inclined section extending upward from the fixed end to the suspended end and an abutting section connected to the inclined section. The moving contact is disposed on the abutting section. When the spring is not under force, the drain hole is located behind the abutting section and extends to a point not lower than the lowest point of the abutting section.

[0011] Traditional spring contact structures are generally configured with an inclined section and an abutment section, allowing the spring contact to have sufficient movement space to flexibly switch between safety switch states. Based on this traditional spring contact structure, the abutment section is located at a higher point than the inclined section, and the abutment section requires a moving contact, making it relatively gentle or even horizontal compared to the inclined section. There may be a significant risk of water accumulation above the abutment section. Therefore, this application arranges the drain hole behind the abutment section when the spring contact is not under force, and the drain hole extends to a point no lower than the lowest point of the abutment section. This allows for more direct and rapid drainage of water accumulated in the abutment section, reducing the probability of water accumulation above the abutment section and preventing water from dripping down from the abutment section onto the circuit board. This provides waterproof protection for both the circuit board and the spring contact itself, further reducing the risk of short circuits.

[0012] In a preferred embodiment, the abutting section includes a transition portion connected to the inclined section, the transition portion being recessed downward, and the drain hole being located behind the transition portion and extending to a point not lower than the lowest point of the transition portion.

[0013] By providing a downward-recessed transition section on the contact segment, the transition section connects with the inclined segment to form multiple bends, making the spring piece more deformable and flexible in its movement. This reduces the effort required for users to press down on the linkage or button, achieving effortless and sensitive control of the safety switch. Since the recessed transition section poses a risk of water accumulation, a drain hole is located behind the transition section and extends to at least the lowest point of the transition section. Even if water accumulates in the transition section, it can be directly and quickly drained from the drain hole, preventing accumulation on the spring piece and dripping onto the circuit board, further protecting the main circuitry.

[0014] In a preferred embodiment, a water-draining area is provided through the circuit board located below the spring contact.

[0015] By creating a drainage area through the circuit board and located below the spring contact, water accumulated on the circuit board can not only be drained backward through the drain hole, but also downward through the drainage area. Water can be drained away from multiple angles, quickly achieving a hydrophobic effect on the circuit board and greatly increasing the hydrophobic effect.

[0016] In a preferred embodiment, the spring sheet includes a first spring sheet and a second spring sheet arranged symmetrically, and the leakage area includes a first leakage area and a second leakage area arranged symmetrically, with the first leakage area and the second leakage area located below the first spring sheet and the second spring sheet, respectively.

[0017] By setting a first and a second spring, with different springs corresponding to different circuits within the main unit, the main unit can output two speeds, providing both high and low speeds and facilitating a wide range of applications. The drainage area includes a symmetrically arranged first and second drainage area, located below the first and second springs respectively. Therefore, even if water accumulates on the first and second springs, it can be quickly drained through the corresponding drainage area, ensuring timely drainage and reducing the risk of short circuits on the circuit board. Furthermore, the symmetrical arrangement of the first and second drainage areas ensures symmetrical arrangement of the hollowed-out areas on the circuit board, resulting in relatively balanced weight on both sides of the circuit board. This balances the weight during assembly of the circuit board and the mounting bracket, making installation convenient and the structure more stable.

[0018] In a preferred embodiment, the spring includes a first spring and a second spring arranged symmetrically, and the leakage area includes a first leakage area located below the first spring and a second leakage area located below the second spring, wherein the first leakage area and the second leakage area are in communication.

[0019] By connecting the first and second leakage areas, the leakage area on the circuit board is further increased, the hydrophobic effect of the circuit board is expanded, the difficulty of water accumulation on the circuit board is increased, and the risk of short circuit on the circuit board is reduced.

[0020] In a preferred embodiment, the food processing machine further includes a cup lid, and the mounting bracket further includes protrusions spaced apart below the circuit board and protruding forward. The bottom of the protrusions is provided with micro-movement push rods for abutting against the cup lid to move the mounting bracket upward. The mounting bracket is also provided with a water outlet that extends through the front and rear, and the water outlet extends upward from the top surface of the protrusions.

[0021] By incorporating a boss on the mounting bracket, a mounting position for the micro-motion push rod is provided, ensuring sufficient mounting strength. When the main unit and cup lid are assembled in place, for example, with the main unit mounted on top of the cup lid, the cup lid pushes the micro-motion push rod upwards. This causes the entire mounting bracket to move the safety switch upwards. Under these conditions, when the user presses the button, causing the connecting rod to move downwards, or directly presses the connecting rod, the moving contacts can engage, triggering the safety switch and energizing the motor. If the micro-motion push rod is not pushed up, pressing the button will not trigger the safety switch. Therefore, the micro-motion push rod effectively detects the proper installation of the main unit and cup lid. Thus, the safety switch can only be triggered with the cooperation of the micro-motion push rod and the connecting rod, resulting in a higher safety factor and preventing abnormalities and dangers caused by the motor operating when the main unit and cup lid are not properly installed. However, while the boss provides an installation position for the micro-motion push rod and ensures sufficient installation strength, it is also large in size and has a large water accumulation area, posing a certain risk of water accumulation. The water accumulated on the boss can form water droplets on the lower surface of the circuit board or cause the circuit board to become damp when heated. Therefore, by setting a water outlet that extends upward from the top surface of the boss, the water on the top surface of the boss can be guided away from the boss, which helps the circuit board to stay dry and extends the life of the circuit board.

[0022] In a preferred embodiment, the circuit board is provided with a mounting hole, and the stationary contact is riveted and fixed to the mounting hole. The stationary contact has a sensing part that is limited to the upper edge of the mounting hole and a riveted flange that is limited to the lower edge of the mounting hole.

[0023] By setting mounting holes on the circuit board, the stationary contact is riveted and fixed to the mounting holes. The assembly process is simple and the connection is strong. At the same time, the riveting method makes the stationary contact have a sensing part limited to the upper edge of the mounting hole and a riveted flange limited to the lower edge of the mounting hole. Compared with traditional soldering, it avoids the irregular accumulation of solder between the stationary contact and the lower surface of the circuit board, which would cause an irregular angle between the stationary contact and the lower surface of the circuit board. This prevents water droplets from forming at the angle when the host is heated after water enters it. Therefore, the riveting method achieves a good hydrophobic effect between the riveted flange and the lower surface of the circuit board, preventing short circuits and moisture on the circuit board.

[0024] In a preferred embodiment, the stationary contacts include a first stationary contact and a second stationary contact symmetrically arranged along the centerline of the circuit board. The circuit board has a first extension protruding along the centerline and a second extension protruding parallel to the first extension. The first extension is provided with an output solder joint, and the second extension is provided with an input solder joint.

[0025] By setting a first extension protruding along the center line of the circuit board, with an output solder joint on the first extension, and a second extension protruding in parallel on the circuit board with an input solder joint, the input and output solder joints are connected to an external power supply or power board via wires. The stationary contacts include a first stationary contact and a second stationary contact symmetrically arranged along the center line of the circuit board. Therefore, the output solder joint is centrally located between the first and second stationary contacts. At this time, in the two conducting loops corresponding to the first and second stationary contacts, the creepage distance between the first stationary contact and the output solder joint is equal to the creepage distance between the second stationary contact and the output solder joint, which is in the optimal path. This prevents leakage current or arcing from the accumulation of contaminants (dust, moisture, powder) on the insulating surface of the circuit board, so that the circuit board has the same level of insulation strength and anti-pollution capability. This provides uniform and predictable safety for the entire circuit board under the expected pollution level and operating voltage.

[0026] In a preferred embodiment, the circuit board has an extension protruding towards the mounting bracket, the extension is inserted into the mounting bracket and has solder joints, and the circuit board has a through-hole leakage area that extends to the extension.

[0027] By incorporating an extension on the circuit board and using solder joints within it for electrical connection to an external power source or power board, the extension is securely assembled into a mounting bracket. A drainage area is incorporated into the circuit board, extending to the extension. This extension effectively provides space for the expansion of the drainage area, increasing the drainage surface area while maintaining sufficient circuit board strength. Furthermore, because the extension is integrated with the mounting bracket, the drainage area located within the extension can be closer to the drain holes of the mounting bracket, and the two may even intersect and connect, further enhancing the circuit board's hydrophobic effect, reducing the risk of short circuits, and improving safety.

[0028] In a preferred embodiment, the bottom end of the drain hole extends downward below the bottom surface of the circuit board.

[0029] By extending the bottom of the drain hole downwards to below the bottom surface of the circuit board, a hydrophobic effect can be created on the bottom surface of the circuit board. Even if moisture condenses inside the main unit, it will not condense on the bottom surface of the circuit board, but will be displaced from the circuit board, thereby keeping the circuit board dry and waterproof, and thus avoiding the risk of short circuit.

[0030] In a preferred embodiment, the spring has a water passage hole, and the longitudinal projection of the water passage hole on the mounting bracket overlaps with the drain hole.

[0031] By creating a water passage hole on the spring plate, when water enters the main unit, the water on the spring plate can leak down through the water passage hole and will not accumulate on top of the spring plate. At the same time, the longitudinal projection of the water passage hole on the mounting bracket overlaps with the drain hole. The water leaking down from the spring plate will be discharged from the drain hole when the user tilts or shakes the main unit, thus preventing it from accumulating on the circuit board and achieving waterproof protection for the circuit board.

[0032] In a preferred embodiment, the circuit board is inserted at an angle into the mounting bracket, and an acute angle is formed between the upper surface of the circuit board and the mounting bracket.

[0033] By tilting the circuit board into the mounting bracket, water on the surface of the circuit board will flow along the tilted surface towards the mounting bracket, eliminating the need for the user to shake or tilt the main unit. When the main unit is upright, the water will automatically flow to the drain hole, thus removing it from the circuit board and preventing water accumulation and short circuits.

[0034] In a preferred embodiment, the spring includes a first spring and a second spring, the stationary contact includes a first stationary contact and a second stationary contact, and the circuit board has a mounting position located between the first stationary contact and the second stationary contact, and the first spring and the second spring are fixed together to the mounting position.

[0035] By fixing the first and second spring contacts together at the same mounting position, it is unnecessary to provide an independent mounting position for each spring contact, as well as to consider creepage distances and clearances. This saves installation space on the circuit board, resulting in a compact structure, reduced circuit board size, and miniaturization of the main unit. It also allows for one-time installation of the first and second spring contacts, simplifying assembly. Different connecting rods are used to press against the first and second spring contacts, conducting different circuits to achieve two motor speeds. The main unit has two speed settings (high and low), making it suitable for a wide range of applications. Attached Figure Description

[0036] 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:

[0037] Figure 1 This is an exploded structural diagram of a food processing machine according to one embodiment of the present invention;

[0038] Figure 2 This is a three-dimensional structural diagram of the switch assembly in one embodiment of the present invention;

[0039] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0040] Figure 4 This is a schematic diagram of the planar structure of the switch assembly in one embodiment of the present invention;

[0041] Figure 5 This is a three-dimensional structural diagram of the mounting bracket in one embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the spring sheet in one embodiment of the present invention;

[0043] Figure 7 This is a cross-sectional view of the safety switch in one embodiment of the present invention;

[0044] Figure 8 This is an exploded view of the switch assembly in one embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the assembly of the stationary contact and the circuit board in one embodiment of the present invention;

[0046] Figure 10 This is a structural diagram of a circuit board in one embodiment of the present invention;

[0047] Figure 11 This is a structural diagram of the circuit board in another embodiment of the present invention.

[0048] List of components and reference numerals: 10, Main unit; 20, Motor; 30, Mounting bracket; 31, Boss; 32, Micro-motion push rod; 301, Drain hole; 302, Outlet; 40, Connecting rod; 50, Safety switch; 51, Spring; 5101, First spring; 5102, Second spring; 511, Inclined section; 512, Contact section; 513, Transition section; 514, Water passage hole; 60, Moving contact; 70, Stationary contact; 71, Sensing part; 72, Riveted flange; 701, First stationary contact; 702, Second stationary contact; 80, Circuit board; 811, First leakage area; 812, Second leakage area; 813, Diode; 82, First extension; 83, Output solder joint; 84, Second extension; 85, Input solder joint; 91, Cup lid; 92, Cup body; 93, Stirring component. Detailed Implementation

[0049] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] like Figure 1 As shown, in one embodiment, this utility model provides a food processing machine, including a main unit 10. A motor 20 and a switch assembly are disposed within the main unit 10. The switch assembly includes a mounting bracket 30, a connecting rod 40 vertically inserted into the mounting bracket 30, and a safety switch 50 located below the connecting rod 40 and triggered by the connecting rod 40. Figure 2 , 3As shown, the safety switch 50 includes a spring contact 51 with a moving contact 60 and a circuit board 80 with a stationary contact 70. One end of the spring contact 51 is fixed to the circuit board 80, and the other end is suspended above the stationary contact 70, so that the moving contact 60 corresponds to the stationary contact 70 above it. The circuit board 80 is placed horizontally on the front side of the mounting bracket 30 and abuts against the mounting bracket 30. Figure 2 As shown, the mounting bracket 30 also includes a drain hole 301 located behind the spring piece 51 and extending through the front and back. The drain hole 301 extends upward from the top surface of the circuit board 80.

[0055] This utility model provides a food processing machine in which the safety switch 50 includes a spring piece 51 with a moving contact 60 and a circuit board 80 with a stationary contact 70. Compared with the conventional safety switch 50 with a housing, it is smaller in size, more compact in structure, and saves installation space. By placing the circuit board 80 horizontally on the front side of the mounting bracket 30 and abutting against the mounting bracket 30, a stable assembly of the circuit board 80 and the mounting bracket 30 is achieved. When the connecting rod 40 moves down, it presses against the spring piece 51, allowing the moving contact 60 to abut against the stationary contact 70 of the circuit board 80, thus turning on the circuit of the main unit 10. The mounting bracket 30 also includes a drain hole 301 located behind the spring piece 51 and extending through it from the top surface of the circuit board 80 upwards. Therefore, even if water enters the main unit 10 due to improper operation during use, the main unit 10 may tilt during installation into the mixing cup, and the main unit 10 may be shaken after cleaning. In this case, water near the circuit board 80 and water close to the spring plate 51 can be drained more directly and quickly from the drain hole 301 behind the spring plate 51. The drainage direction is referenced... Figure 2 As indicated by the arrow, this design prevents water accumulation on the upper side of the circuit board 80 when the main unit 10 is installed correctly or placed upright, reducing the risk of water accumulation on the circuit board 80. This prevents short circuits and damage to the circuit board 80 when the user turns on the machine, and also prevents prolonged water accumulation on the upper part of the circuit board 80 from causing soaking and damage, thus extending the service life of both the circuit board 80 and the main unit 10. Furthermore, this food processing machine prevents water accumulation on the circuit board 80 simply by modifying the mounting bracket 30. The circuit board 80 has good waterproof performance, and there is no need for additional sealing structures that would increase sealing costs or complicate assembly. This also ensures stable operation of the main unit 10.

[0056] It should be noted that the food processor provided by this utility model can be a meat grinder, including a cup body 92 with a stirring component 93 (meat grinder blade and / or dough mixer), a cup lid 91 covering the cup body 92, and a main unit 10 installed above the cup lid 91. A button for user operation is movably provided on the top of the main unit 10. Pressing down the button pushes the connecting rod 40 down, pressing the spring piece 51 down until the moving contact 60 abuts against the stationary contact 70, thus completing the circuit. Of course, the food processor provided by this utility model is not limited to a meat grinder; it can also be a portable juicer. The main unit 10 can optionally be installed above the cup body 92, or the cup body 92 can be installed above the main unit 10.

[0057] Additionally, it should be noted that circuit board 80 can be horizontally inserted into mounting bracket 30, as shown in the reference. Figure 2 , 4 Alternatively, the circuit board 80 can be tilted and inserted into the mounting bracket 30. Preferably, the circuit board 80 is tilted and inserted into the mounting bracket 30 to form an acute angle between the upper surface of the circuit board and the mounting bracket 30. With this configuration, if water is present on the circuit board 80, it will flow along the tilted surface of the circuit board 80 towards the mounting bracket 30. This eliminates the need for the user to shake or tilt the main unit 10. When the main unit 10 is upright, the water will automatically flow to the drain hole 301, thus dislodging the circuit board 80 and preventing water accumulation and short circuits.

[0058] like Figure 1-5 As shown, this utility model does not limit the size, number, or position of the drain holes 301. For example, the number and position of the drain holes 301 can be set according to the number and position of the spring contacts 51. Preferably, the bottom end of the drain holes 301 extends downward to below the bottom surface of the circuit board 80. By extending the bottom end of the drain holes 301 downward to below the bottom surface of the circuit board 80, a hydrophobic effect can be generated on the bottom surface of the circuit board 80. Even if moisture evaporates and condenses inside the host 10, it will not condense on the bottom surface of the circuit board 80, but will be separated from the circuit board 80, thereby keeping the circuit board 80 dry and waterproof, and thus avoiding the risk of short circuit of the circuit board 80.

[0059] like Figure 6 , 7 As shown, in a preferred embodiment, the spring piece 51 includes an inclined section 511 extending upward from the fixed end to the suspended end and an abutting section 512 connected to the inclined section 511. A movable contact 60 is disposed on the abutting section 512. When the spring piece 51 is not under force, the drain hole 301 is located behind the abutting section 512, and the drain hole 301 extends to a point not lower than the lowest point of the abutting section 512. More preferably, as shown... Figure 6 As shown, the contact section 512 includes a transition portion 513 connected to the inclined section 511. The transition portion 513 is recessed downwards, engaging... Figure 4The drain hole 301 is located behind the transition section 513 and extends to a point no lower than the lowest point of the transition section 513.

[0060] By setting the spring 51 as an inclined section 511 and an abutting section 512, the spring 51 has sufficient room to move to achieve flexible switching of the state of the safety switch 50. Since the abutting section 512 is located at a higher point than the inclined section 511 and the moving contact 60 of the abutting section 512 needs to be set relatively gently or even horizontally compared to the inclined section 511, there may be a greater risk of water accumulation above the abutting section 512. Therefore, when the spring 51 is not under force, the drain hole 301 is located behind the abutting section 512 and extends to a point no lower than the lowest point of the abutting section 512. This allows for more direct and rapid drainage of water accumulated in the abutting section 512, reducing the probability of water accumulation above the abutting section 512 and preventing water from dripping down from the abutting section 512 onto the circuit board 80. This provides waterproof protection for both the circuit board 80 and the spring 51 itself, further reducing the risk of short circuit.

[0061] By providing a transition section 513 on the contact section 512, and the transition section 513 being recessed downwards, the transition section 513 connects with the inclined section 511 to form multiple bends, making the spring piece 51 easier to deform and more flexible in movement. This reduces the effort required for the user to press down the linkage 40 or the button, achieving effortless and sensitive control of the safety switch 50. Since the recessed transition section 513 poses a risk of water accumulation, the drain hole 301 is located behind the transition section 513. Even if water accumulates in the transition section 513, it can be directly and quickly drained from the drain hole 301, preventing it from accumulating on the spring piece 51 or dripping onto the circuit board 80, further protecting the main unit 10 circuitry.

[0062] It should be noted that the structure of the spring piece 51 is not limited to the one described above. In fact, the contact section 512 of the spring piece 51 can extend horizontally, and the moving contact 60 is fixed to the horizontally extending contact section 512 to reliably abut against the stationary contact 70. When the contact section 512 extends horizontally, preferably, the drain hole 301 extends to a level not lower than the upper surface of the contact section 512.

[0063] Understandably, even if the drain hole 301 is not located behind the contact section 512 and is misaligned with the contact section 512, the main unit 10 will be tilted during the user's installation of the bracket 30 or cleaning of the main unit 10. Therefore, water on the surface of the circuit board 80 and the spring piece 51 can still be discharged from the drain hole 301, and the water-repellent effect can still be achieved.

[0064] like Figure 6As shown, in a preferred embodiment, the spring piece 51 has a water passage hole 514, the longitudinal projection of which overlaps with the drain hole 301 on the mounting bracket 30. In this embodiment, the structure of the spring piece 51 may be, but is not limited to, the above-described structure including an inclined section 511 and an abutment section 512. Preferably, the water passage hole 514 is formed in the inclined section 511.

[0065] By opening a water passage hole 514 on the spring plate 51, when water enters the host 10, the water on the spring plate 51 can leak down through the water passage hole 514 and will not accumulate on the top of the spring plate 51. At the same time, the longitudinal projection of the water passage hole 514 on the mounting bracket 30 overlaps with the drain hole 301. The water leaking from the spring plate 51 can be discharged from the drain hole 301 when the user tilts or shakes the host 10, so it will not accumulate on the circuit board 80, thus achieving waterproof protection for the circuit board 80.

[0066] like Figure 7 , 8 As shown, in a preferred embodiment, a water-draining area, such as a first water-draining area 811 and a second water-draining area 812, is provided through the circuit board 80 below the spring contact 51. The circuit board 80 also includes a diode 813. The positions of the water-draining area and the diode are not limited, but preferably the water-draining area and the diode 813 are staggered to ensure reliable fixing of the diode 813.

[0067] By creating a drainage area through the circuit board 80 below the spring piece 51, water accumulated on the circuit board 80 can not only be discharged backward from the drain hole 301, but also downward from the drainage area. Water accumulated on the circuit board 80 can be discharged from multiple angles, quickly achieving a hydrophobic effect on the circuit board 80 and greatly increasing the hydrophobic effect.

[0068] like Figure 7 , 8 As shown, more preferably, the spring 51 includes a first spring 5101 and a second spring 5102 arranged symmetrically, and the water leakage area includes a first water leakage area 811 and a second water leakage area 812 arranged symmetrically. The first water leakage area 811 and the second water leakage area 812 are respectively located below the first spring 5101 and the second spring 5102.

[0069] By setting the first spring contact 5101 and the second spring contact 5102, different spring contact 51 are connected to different circuits in the host 10, thereby realizing two speed outputs of the host 10. The host 10 has two speeds, high and low, and has a wide range of applications. The water leakage area includes a first water leakage area 811 and a second water leakage area 812 arranged symmetrically. The first water leakage area 811 and the second water leakage area 812 are located below the first spring contact 5101 and the second spring contact 5102, respectively. Therefore, even if water accumulates in the first spring contact 5101 and the second spring contact 5102, it can be quickly drained through the corresponding water leakage area. The drainage is timely, reducing the risk of short circuit of the circuit board 80. At the same time, the symmetrical arrangement of the first water leakage area 811 and the second water leakage area 812 makes the hollowed-out area of ​​the circuit board 80 symmetrically arranged, and the weight of the two sides of the circuit board 80 is relatively balanced. The weight is balanced during the assembly of the circuit board 80 and the mounting bracket 30, making the installation convenient and the installation structure more stable.

[0070] Alternatively, more preferably, the spring 51 includes a first spring 5101 and a second spring 5102 arranged symmetrically, and the water leakage area includes a first water leakage area 811 located below the first spring 5101 and a second water leakage area 812 located below the second spring 5102, with the first water leakage area 811 and the second water leakage area 812 communicating with each other.

[0071] By connecting the first leakage area 811 with the second leakage area 812, the leakage area on the circuit board 80 is further increased, the water-draining effect of the circuit board 80 is expanded, the difficulty of water accumulation on the circuit board 80 is increased, and the risk of short circuit on the circuit board 80 is reduced.

[0072] Of course, the aforementioned leakage area can be a single leakage hole or a leakage network composed of several mesh openings. The first leakage area 811 and the second leakage area 812 are separated by the line of symmetry between the first spring piece 5101 and the second spring piece 5102.

[0073] In addition to being arranged symmetrically, the first leakage area 811 and the second leakage area 812 can also be arranged side by side. For example, the first leakage area 811 is located below the spring piece 51, and in the case of two spring pieces 51, it can span across the bottom of both spring pieces 51. The second leakage area 812 is located side by side behind the first leakage area 811. Alternatively, the circuit board 80 also includes a third leakage area, which is arranged along the outer periphery of the spring piece 51 to drain water that has fallen to the side due to shaking of the spring piece 51.

[0074] like Figure 8As shown, in a preferred embodiment, the food processing machine further includes a cup lid 91, and the mounting bracket 30 further includes a boss 31 spaced below the circuit board 80 and protruding forward. The bottom of the boss 31 is provided with a micro-movement rod 32 for abutting against the cup lid 91 to move the mounting bracket 30 upward. The mounting bracket 30 is also provided with a water outlet 302 that extends through the front and rear, and the water outlet 302 extends upward from the top surface of the boss 31.

[0075] By providing a protrusion 31 to the mounting bracket 30, a mounting position for the micro-motion rod 32 is provided, ensuring sufficient mounting strength. When the main unit 10 and the cup lid 91 are assembled in place, for example, when the main unit 10 is installed above the cup lid 91, the cup lid 91 pushes the micro-motion rod 32 upwards, thereby enabling the mounting bracket 30 as a whole to move the safety switch 50 upwards. Under this premise, when the user presses down the button to move the connecting rod 40 downwards or directly presses down the connecting rod 40, the moving contacts 60 can be engaged, triggering the safety switch 50 and energizing the motor 20. If the micro-motion rod 32 is not pushed up, even if the user presses down the button, the safety switch 50 will not be triggered. Therefore, the micro-motion rod 32 enables the detection of the installation position of the main unit 10 and the cup lid 91. Thus, the safety switch 50 can only be triggered with the cooperation of the micro-motion rod 32 and the connecting rod 40, resulting in a higher safety factor and preventing abnormalities and dangers caused by the motor 20 operating when the main unit 10 and the cup lid 91 are not installed in place. However, while the boss 31 provides an installation position for the micro-motion push rod and ensures sufficient installation strength, it is also large in size and has a large water accumulation area, posing a certain risk of water accumulation. The water accumulated on the boss can form water droplets on the lower surface of the circuit board or cause the circuit board to become damp when heated. Therefore, by setting a water outlet 302, which extends upward from the top surface of the boss 31, the water on the top surface of the boss is guided away from the boss 31, which helps the circuit board to stay dry and extends the life of the circuit board.

[0076] like Figure 9 As shown, in a preferred embodiment, the circuit board 80 is provided with a mounting hole, and the stationary contact 70 is riveted and fixed to the mounting hole. The stationary contact 70 has a sensing part 71 that is limited to the upper edge of the mounting hole and a riveted flange 72 that is limited to the lower edge of the mounting hole. Preferably, the thickness of the riveted flange 72 is less than or equal to 2 mm.

[0077] By setting mounting holes on the circuit board 80, the stationary contact 70 is riveted and fixed to the mounting holes. The assembly process is simple and the connection is strong. At the same time, the riveting method makes the stationary contact 70 have a sensing part 71 limited to the upper edge of the mounting hole and a riveting flange 72 limited to the lower edge of the mounting hole. Compared with the traditional soldering method, it avoids the irregular accumulation of solder between the stationary contact 70 and the lower surface of the circuit board 80, which would cause an irregular angle between the stationary contact 70 and the lower surface of the circuit board 80. This prevents water droplets from forming at the angle when the host 10 is heated by water ingress. Therefore, the riveting method achieves a good hydrophobic effect between the riveting flange 72 and the lower surface of the circuit board 80, preventing the circuit board 80 from short-circuiting and getting damp.

[0078] It should be noted that this utility model does not limit the structure of the circuit board 80, for example:

[0079] like Figure 10 As shown, in a preferred embodiment, the stationary contact 70 includes a first stationary contact 701 and a second stationary contact 702 symmetrically arranged along the center line of the circuit board 80. The circuit board 80 is provided with a first extension 82 protruding along the center line and a second extension 84 protruding parallel to the first extension 82. The first extension 82 is provided with an output solder joint 83, and the second extension 84 is provided with an input solder joint 85.

[0080] A first extension 82 protruding along the center line is provided on the circuit board 80, and an output solder joint 83 is provided on the first extension 82. A second extension 84 protruding in parallel on the circuit board 80 provides an input solder joint 85. The input solder joint 85 and the output solder joint 83 are connected to an external power supply or power board via wires. The stationary contact 70 includes a first stationary contact 701 and a second stationary contact 702 symmetrically arranged along the center line of the circuit board 80. Therefore, the output solder joint 83 is centrally located between the first stationary contact 701 and the second stationary contact 702. In the two conducting circuits corresponding to point 701 and the second stationary contact 702, the creepage distance between the first stationary contact 701 and the output solder joint 83 is equal to the creepage distance between the second stationary contact 702 and the output solder joint 83, which is in the optimal path. This prevents leakage current or arcing from the accumulation of contaminants (dust, moisture, powder) on the insulating surface of the circuit board 80, so that the circuit board 80 has the same level of insulation strength and anti-pollution capability. This provides uniform and predictable safety for the entire circuit board 80 under the expected pollution level and operating voltage.

[0081] like Figure 11As shown, in another preferred embodiment, the circuit board 80 has an extension protruding towards the mounting bracket 30. The extension is inserted into the mounting bracket 30 and has solder joints. The circuit board 80 has a through-hole drainage area that extends to the extension. Preferably, the extension includes a first extension 82 with an output solder joint 83 and a second extension 84 with an input solder joint 85. The first extension 82 and the second extension 84 are symmetrically arranged about the center line of the circuit board 80.

[0082] By providing an extension on the circuit board 80, and using solder joints on the extension for electrical connection with an external power supply or power board, the extension is inserted into the mounting bracket 30 to form a reliable assembly. A drainage area is provided on the circuit board 80, extending to the extension. This effectively provides space for the expansion of the drainage area, increasing the drainage surface area while ensuring sufficient strength of the circuit board 80. Furthermore, because the extension is inserted into the mounting bracket 30, the drainage area located on the extension can be closer to the drain hole 301 of the mounting bracket 30, and the two may even intersect and connect, further enhancing the hydrophobic effect of the circuit board 80, reducing the risk of short circuits, and improving safety.

[0083] Regardless of the circuit board 80 structure used, preferably, the spring 51 includes a first spring 5101 and a second spring 5102, the stationary contact 70 includes a first stationary contact 701 and a second stationary contact 702, and the circuit board 80 is provided with a mounting position located between the first stationary contact 701 and the second stationary contact 702, and the first spring 5101 and the second spring 5102 are fixed together to the mounting position.

[0084] Optionally, by setting the shared mounting position on the center line of the circuit board 80, the symmetry of the first spring and the second spring 5102 is achieved, and the force applied by the user when pressing down the first connecting rod 40 of the first spring 5101 is the same as the force applied when pressing down the second connecting rod 40 of the second spring 5102. Alternatively, by offsetting the shared mounting position relative to the center line of the circuit board 80, with the first stationary contact 701 and the second stationary contact 702 symmetrical about the center line, the trigger stroke of the first spring 5101 and the second spring 5102 will differ, creating a difference in force and producing different tactile cues. Of course, the first spring 5101 and the second spring 5102 can also be independently mounted on different mounting positions on the circuit board 80; it is understood that the safety switch provided by this utility model may also include only one spring or three or more springs.

[0085] By fixing the first spring 5101 and the second spring 5102 together in the same mounting position, it is not necessary to provide an independent mounting position for each spring 51, as well as the surrounding creepage distance and electrical clearance. This saves the installation space of the circuit board 80, resulting in a compact structure, reduced circuit board 80 size, and miniaturization of the main unit 10. It also allows for one-time installation of the first spring 5101 and the second spring 5102, simplifying assembly. By using different connecting rods 40 to correspondingly press the first spring 5101 and the second spring 5102, different circuits are activated, thereby achieving two speed outputs for the motor 20. The main unit 10 has two speeds, high and low, making it suitable for a wide range of applications.

[0086] It is understandable that when the spring piece 51 includes a first spring piece 5101 and a second spring piece 5102, the drainage hole 301 may include a first drainage hole 301 located behind the first spring piece 5101 and a second drainage hole 301 located behind the second spring piece 5102, with the first drainage hole 301 and the second drainage hole 301 being independently provided. Alternatively, the first drainage hole 301 and the second drainage hole 301 may be connected to form a single drainage hole 301. Furthermore, the drainage hole 301 may be mesh-shaped.

[0087] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0088] 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.

[0089] The above are merely embodiments of this utility model and are 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, wherein the main unit contains a motor, a mounting bracket, a connecting rod vertically inserted through the mounting bracket, and a safety switch located below the connecting rod and triggered by the connecting rod, characterized in that, The safety switch includes a spring with a moving contact and a circuit board with a stationary contact. One end of the spring is fixed to the circuit board and the other end is suspended above the stationary contact, so that the moving contact corresponds to the stationary contact above the stationary contact. The circuit board is placed horizontally on the front side of the mounting bracket and abuts against the mounting bracket. The mounting bracket also includes a drain hole located behind the spring and extending through the front and back. The drain hole extends upward from the top surface of the circuit board.

2. The food processing machine according to claim 1, characterized in that, The spring sheet includes an inclined section extending upward from the fixed end to the suspended end and an abutting section connected to the inclined section. The moving contact is located on the abutting section. When the spring sheet is not under force, the drain hole is located behind the abutting section and extends to a point no lower than the lowest point of the abutting section.

3. A food processing machine according to claim 2, characterized in that, The contact section includes a transition portion connected to the inclined section, the transition portion being recessed downwards, and the drain hole being located behind the transition portion and extending to a point not lower than the lowest point of the transition portion.

4. A food processing machine according to claim 1, characterized in that, A water-draining area is provided through the circuit board, located below the spring piece.

5. A food processing machine according to claim 4, characterized in that, The spring sheet includes a first spring sheet and a second spring sheet arranged symmetrically, and the leakage area includes a first leakage area and a second leakage area arranged symmetrically, with the first leakage area and the second leakage area located below the first spring sheet and the second spring sheet, respectively. Alternatively, the spring sheet includes a first spring sheet and a second spring sheet arranged symmetrically, and the leakage area includes a first leakage area located below the first spring sheet and a second leakage area located below the second spring sheet, with the first leakage area and the second leakage area communicating with each other.

6. A food processing machine according to claim 1, characterized in that, The food processing machine also includes a cup lid, and the mounting bracket also includes protrusions spaced apart below the circuit board and protruding forward. The bottom of the protrusions is provided with micro-movement push rods for abutting against the cup lid to move the mounting bracket upward. The mounting bracket is also provided with a water outlet that runs through the front and back, and the water outlet extends upward from the top surface of the protrusions.

7. A food processing machine according to claim 1, characterized in that, The circuit board is provided with mounting holes, and the stationary contact is riveted and fixed to the mounting holes. The stationary contact has a sensing part that is limited to the upper edge of the mounting hole and a riveted flange that is limited to the lower edge of the mounting hole.

8. A food processing machine according to claim 1, characterized in that, The stationary contacts include a first stationary contact and a second stationary contact symmetrically arranged along the center line of the circuit board. The circuit board is provided with a first extension protruding along the center line and a second extension protruding parallel to the first extension. The first extension is provided with an output solder joint, and the second extension is provided with an input solder joint. Alternatively, the circuit board has an extension protruding towards the mounting bracket, the extension is inserted into the mounting bracket and has solder joints, the circuit board has a through-hole leakage area, and the leakage area extends to the extension.

9. A food processing machine according to claim 1, characterized in that, The bottom end of the drain hole extends downwards to below the bottom surface of the circuit board.

10. A food processing machine according to claim 1, characterized in that, The spring has a water passage hole, and the longitudinal projection of the water passage hole on the mounting bracket overlaps with the drain hole. Alternatively, the circuit board is inserted at an angle into the mounting bracket, with an acute angle formed between the upper surface of the circuit board and the mounting bracket; Alternatively, the spring includes a first spring and a second spring, the stationary contact includes a first stationary contact and a second stationary contact, and the circuit board has a mounting position located between the first stationary contact and the second stationary contact, with the first spring and the second spring fixed together to the mounting position.

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