A blender

Abstract

The utility model discloses a kind of mixers, including host computer;Mixing knife seat is connected at the top end of host computer;Mixing cup is assembled on mixing knife seat, and closed mixing space is formed;Valve stem is connected on mixing knife seat, valve stem can move up and down along the axial direction, and, one end of valve stem penetrates mixing knife seat, so that one end of valve stem is always in contact with air in mixing space;One end of valve stem away from mixing space is connected with magnet, magnet can make synchronous motion with valve stem;Hall switch is arranged in the directly below of magnet in host computer, for detecting the position state of magnet;When the pressure in mixing space is normal, valve stem and magnet are in initial position, Hall switch does not detect the trigger signal of magnet, host computer maintains work;When the pressure in mixing space exceeds set value, valve stem drives magnet displacement to trigger position, Hall switch detects magnet signal and controls host computer to stop working.The utility model automatically stops when pressure is overrun.

Description

Technical Field

[0001] This utility model relates to the technical field of mixers, and more particularly to a mixer. Background Technology

[0002] During use, if a consumer misuses the sealed container and continuously over-blends the same cup, there is a risk that the container may explode. This is especially true for small-capacity blending cups, or for blending certain recipes (such as boiling water with protein powder). Continuously blending the same cup can easily lead to an explosion, posing a safety hazard to consumers.

[0003] The main types of conservation organizations currently in operation are as follows:

[0004] 1. A temperature sensor is placed on the blade holder inside the cup. When the food temperature in the cup reaches the set value, the resistance of the temperature sensor changes, generating a signal that is transmitted back to the main unit, which then disconnects the motor power. However, a sensor probe connector needs to be installed on the main unit and the blade holder to transmit the temperature sensor signal from the blade holder to the main unit. Since the blade holder and the main unit are separate structures, the probe connector has a complex structure and is at risk of failure.

[0005] 2. A spring-loaded pressure relief valve is placed on the blade holder. When the gas pressure in the cup exceeds the set spring pressure, the spring is pushed up, and the pressure is released from the valve. However, the leaked liquid flows onto the main unit, affecting the performance. Furthermore, the valve opening is too small, resulting in slow pressure release, and continuous operation may still lead to an explosion. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] The technical problem this invention aims to solve is to provide a mixer that achieves real-time monitoring of the internal pressure of the mixing space through the mechanical linkage of a valve stem and a magnet combined with the electrical detection of a Hall effect switch. It automatically shuts down when the pressure exceeds the limit, avoiding the risk of explosion or leakage due to excessive pressure. The Hall effect switch detects changes in magnetic field, preventing direct contact between the circuit and the high-pressure environment, thus improving safety. The valve stem directly senses the pressure of the mixing space, eliminating the need for additional sensors, reducing costs and increasing reliability. The mixer can only be restarted after manually resetting the valve stem, providing a user reminder and enhancing safety. This effectively solves the safety hazards caused by continuous over-mixing in mixers.

[0008] (II) Technical Solution

[0009] The solution adopted by this utility model to solve the above-mentioned technical problems is a mixer, including...

[0010] Host;

[0011] A stirring blade holder, which is connected to the top of the main unit;

[0012] A stirring cup is assembled on the stirring blade holder and forms a closed stirring space;

[0013] A valve stem is connected to the stirring blade holder. The valve stem can move up and down along the axial direction. One end of the valve stem passes through the stirring blade holder so that one end of the valve stem is always in contact with the air in the stirring space.

[0014] A magnet is connected to the end of the valve stem away from the stirring space, and the magnet can move synchronously with the valve stem.

[0015] A Hall switch is installed inside the host unit directly below the magnet to detect the position of the magnet.

[0016] When the pressure in the stirring space is normal, the valve stem and the magnet are in their initial positions, the Hall switch does not detect the trigger signal of the magnet, and the main unit continues to operate;

[0017] When the pressure in the stirring space exceeds a set value, the valve stem drives the magnet to move to the trigger position, the Hall switch detects the signal from the magnet and controls the main unit to stop working.

[0018] In some embodiments, the Hall switch is normally open and outputs a signal only when the magnet reaches the trigger position.

[0019] In some embodiments, the main unit includes a housing, a motor disposed within the housing, a stirring shaft connected to the output end of the motor, and a stirring blade connected to the stirring shaft; the stirring blade is always placed within the stirring space of the cup body; the stirring shaft is connected to the motor via the stirring blade holder; and the stirring blade holder is detachably connected to the main unit.

[0020] Specifically, during normal operation, the valve stem is in its initial position, and the main unit operates normally. When the pressure in the stirring space of the cup exceeds the set value, the valve stem is forced to move downward, causing the magnet to move downward synchronously. The magnet approaches the Hall switch, and the Hall switch detects the signal from the magnet and controls the main unit to stop working. When the user unscrews the stirring blade holder to release the pressure and manually resets the valve stem to move upward to its initial position, the main unit can be restarted.

[0021] By employing the above solution, the mechanical linkage between the valve stem and magnet, combined with the electrical detection of the Hall effect switch, enables real-time monitoring of the internal pressure of the mixing space. It automatically shuts down when the pressure exceeds the limit, preventing the risk of explosion or leakage due to excessive pressure. The Hall effect switch detects changes in the magnetic field, avoiding direct contact between the circuit and the high-pressure environment, thus improving safety. The valve stem directly senses the pressure of the mixing space, eliminating the need for additional sensors, reducing costs and ensuring high reliability. The system requires manual reset of the valve stem before restarting, providing a user reminder and enhancing safety.

[0022] In some embodiments, the valve stem includes a pressure sensing surface disposed at one end near the stirring space. When the pressure in the stirring space exceeds a set value, the pressure sensing surface of the valve stem is forced to move the magnet synchronously downward to the trigger position; the Hall switch detects the signal from the magnet and controls the host to stop working.

[0023] By adopting the above scheme, the pressure sensing surface has a larger force-bearing area, making it more sensitive to pressure changes and ensuring timely response to overpressure conditions.

[0024] In some embodiments, an elastic sealing ring is provided between the stirring blade holder and the valve stem.

[0025] By adopting the above solution, the elastic sealing ring ensures the sealing of the stirring space and prevents leakage; while ensuring sealing, it allows axial movement of the valve stem to ensure that pressure can be effectively transmitted; and the elastic sealing ring can provide a reset force when the valve stem is manually reset to help the valve stem return to its initial position.

[0026] In some embodiments, the stirring blade holder is provided with a mounting shaft hole for mounting the valve stem, and the elastic sealing ring is provided between the mounting shaft hole and the valve stem.

[0027] By adopting the above solution, the mounting shaft hole ensures the accurate positioning of the valve stem and avoids deviation from affecting the detection accuracy.

[0028] In some embodiments, the resilient sealing ring includes a first sealing portion covering the valve stem, a second sealing portion extending from the periphery of the bottom of the first sealing portion toward the direction of the stirring space, and a third sealing portion formed by the outer edge of the second sealing portion extending radially.

[0029] The above solution employs a three-layer structure design for the elastic sealing ring, which enhances the sealing effect and prevents leakage in different directions. Furthermore, the third sealing part is compressed and fixed through radial extension, preventing the elastic sealing ring from falling off.

[0030] In some embodiments, the valve stem includes a stem head and a stem body, the stem head being adapted to the mounting shaft hole, the stem body being formed at the end of the stem head away from the stirring space; and the shaft diameter of the stem body is smaller than the diameter of the stem head, and the first sealing portion covers the stem body.

[0031] In some embodiments, the pressure-sensing surface is formed at the top of the rod head, and the rod body includes a first rod portion, a second rod portion, and a third rod portion arranged from top to bottom; the axial diameter of the first rod portion is smaller than the axial diameter of the third rod portion, the second rod portion is a frustum-shaped structure connecting the first rod portion and the second rod portion, and the top axial diameter of the second rod portion is the same as the axial diameter of the first rod portion; the first sealing portion includes a first covering portion covering the first rod portion and a second covering portion formed by the bottom end of the first covering portion axially inclined outward and downward, the second covering portion covering the second rod portion and part of the third rod portion; the first rod portion and the rod head are connected, and the magnet is connected to the bottom end of the third rod portion.

[0032] In some embodiments, a fixing frame is connected to the end of the stirring blade holder away from the stirring cup. The fixing frame has a receiving space for accommodating the valve stem. The receiving space is arranged vertically to avoid vertical movement of the valve stem and the magnet. Furthermore, the third sealing part is confined between the fixing frame and the stirring blade holder.

[0033] In some embodiments, the end of the stirring blade holder away from the stirring space extends downward around the mounting shaft hole to form a first extension wall, and the portion outside the mounting shaft hole extends downward to form a second extension wall; the first extension wall and the second extension wall can restrict the radial displacement of the third sealing portion, the fixing bracket extends between the first extension wall and the second extension wall and can restrict the axial displacement of the third sealing portion, and the outer wall of the first extension wall and the inner wall of the fixing bracket can fix the second sealing portion.

[0034] In some embodiments, the end of the stirring blade holder away from the stirring space is further provided with two fixing posts, and the fixing frame is provided with fixing holes that can cooperate with the two fixing posts.

[0035] Using the above scheme, the stirring blade holder restricts the radial / axial displacement of the elastic sealing ring through the fixing frame, and the fixing frame cooperates with the first extension wall and the second extension wall to fix the elastic sealing ring, preventing it from loosening or shifting.

[0036] In some embodiments, the host computer is provided with a circuit board, and the Hall switch is electrically connected to the circuit board. When the Hall switch detects the signal of the magnet, it sends a signal to the circuit board to control the power to be cut off, and the host computer stops working.

[0037] Using the above solution, the Hall switch is connected to the circuit board. After detecting the signal, it cuts off the power supply. The electrical signal directly controls the circuit board to turn off the power, resulting in a rapid shutdown response. The Hall switch is integrated with the circuit board, reducing external wiring and lowering the failure rate.

[0038] In some embodiments, the Hall switch is connected to one end of the circuit board near the magnet.

[0039] In some embodiments, the top of the host is provided with a host cover, and the host cover is provided with a first engagement groove for engaging the circuit board at one end near the host, and a second engagement groove for engaging the Hall switch at the other end near the first engagement groove; and the ends of the first engagement groove and the second engagement groove that are close to each other are interconnected.

[0040] By adopting the above scheme, the second locking slot ensures that the Hall switch and the magnet are aligned, thus improving the detection accuracy; and the setting of the first locking slot and the second locking slot avoids displacement or poor contact caused by vibration of the circuit board and the Hall switch.

[0041] (III) Beneficial Effects

[0042] Compared with the prior art, this utility model designs a mixer.

[0043] (1) This utility model achieves real-time monitoring of the internal pressure of the mixing space by combining the mechanical linkage of the valve stem and the magnet with the electrical detection of the Hall switch. When the pressure exceeds the limit, the machine will automatically stop to avoid the risk of explosion or leakage due to excessive pressure. The Hall switch detects changes in magnetic field to avoid direct contact between the circuit and the high-pressure environment, thus improving safety. The valve stem directly senses the pressure of the mixing space without the need for additional sensors, which reduces costs and ensures high reliability. The machine can only be restarted after the valve stem is manually reset, which can remind the user and make it safer. It can effectively solve the safety hazards caused by continuous over-mixing of the mixer.

[0044] (2) The present invention ensures the sealing of the stirring space and prevents leakage through the elastic sealing ring; while ensuring the sealing, it allows the axial movement of the valve stem to ensure that the pressure can be effectively transmitted; and the elastic sealing ring can provide a reset force when the valve stem is manually reset to help the valve stem return to its initial position.

[0045] (3) The elastic sealing ring of this utility model adopts a three-layer structure design, which enhances the sealing effect and prevents leakage in different directions; in addition, the third sealing part is pressed and fixed by radial extension to prevent the elastic sealing ring from falling off.

[0046] (4) The stirring blade holder of this utility model restricts the radial / axial displacement of the elastic sealing ring by means of a fixing frame. The fixing frame and the first extension wall and the second extension wall fix the elastic sealing ring to prevent it from loosening or shifting.

[0047] (5) This utility model connects the circuit board through the Hall switch, cuts off the power after detecting the signal, and the electrical signal directly controls the power off of the circuit board, so the shutdown response is fast; the Hall switch is integrated with the circuit board, reducing external wiring and reducing the failure rate; the second locking slot ensures that the Hall switch and the magnet are aligned, improving the detection accuracy; and the setting of the first locking slot and the second locking slot avoids the vibration of the circuit board and the Hall switch causing displacement or poor contact. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a cross-sectional view of a mixer according to the present invention;

[0050] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0051] Figure 3 This is a cross-sectional view of a mixer according to the present invention;

[0052] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0053] Figure 5 This is a schematic diagram of the valve stem structure of this utility model;

[0054] Figure 6 This is a schematic diagram of the structure of the elastic sealing ring of this utility model.

[0055] The component names corresponding to the various reference numerals in the figure are as follows: 100, Main unit; 101, Hall switch; 102, Circuit board; 103, Main unit cover; 1031, First locking groove; 1032, Second locking groove; 104, Outer shell; 105, Motor; 106, Stirring shaft; 107, Stirring blade; 200, Stirring blade holder; 201, Mounting shaft hole; 202, First extension wall; 203, Second extension wall; 204, Fixing column; 300, Stirring cup; 301, Stirring wheel. 400. Stirring space; 401. Valve stem; 402. Pressure sensing surface; 403. Rod head; 4031. Rod body; 4032. First rod body part; 4033. Second rod body part; 4034. Third rod body part; 500. Magnet; 600. Elastic sealing ring; 601. First sealing part; 6011. First covering part; 6012. Second covering part; 602. Second sealing part; 603. Third sealing part; 700. Fixing bracket; 701. Receiving space; 702. Fixing hole. Detailed Implementation

[0056] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0057] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0058] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] It should be noted that the following description covers various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0060] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0061] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0062] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0063] like Figures 1-6As shown, this utility model provides a mixer, including a main unit 100; a stirring blade holder 200 connected to the top of the main unit 100; a stirring cup 300 assembled on the stirring blade holder 200, forming a closed stirring space 301; a valve stem 400 connected to the stirring blade holder 200, the valve stem 400 being able to move up and down axially, and one end of the valve stem 400 penetrating the stirring blade holder 200 so that one end of the valve stem 400 is always in contact with the air in the stirring space 301; a magnet 500 is connected to the end of the valve stem 400 away from the stirring space 301, the magnet 500 being able to move up and down with the stirring blade holder 200. The valve stem 400 moves synchronously; a Hall switch 101 is located directly below the magnet 500 within the main unit 100 to detect the position of the magnet 500. When the pressure within the stirring space 301 is normal, the valve stem 400 and the magnet 500 are in their initial positions, the Hall switch 101 does not detect a trigger signal from the magnet 500, and the main unit 100 continues to operate. When the pressure within the stirring space 301 exceeds a set value, the valve stem 400 moves the magnet 500 to the trigger position, the Hall switch 101 detects the signal from the magnet 500, and controls the main unit 100 to stop operating. In some embodiments, the Hall switch 101 is normally open, outputting a signal only when the magnet 500 reaches the trigger position. In some embodiments, the main unit 100 includes a housing 104, a motor 105 disposed within the housing 104, a stirring shaft 106 connected to the output end of the motor 105, and a stirring blade 107 connected to the stirring shaft 106; the stirring blade 107 is always placed within the stirring space 301 of the cup body; the stirring shaft 106 is connected to the motor 105 via the stirring blade holder 200; and the stirring blade holder 200 is detachably connected to the main unit 100. Specifically, during normal operation, the valve stem 400 is in its initial position, and the main unit 100 operates normally. When the pressure in the stirring space 301 of the cup exceeds a set value, the valve stem 400 is forced to move downward, causing the magnet 500 to move downward synchronously. The magnet 500 approaches the Hall switch 101, and the Hall switch 101 detects the signal from the magnet 500 and controls the main unit 100 to stop working. When the user unscrews the stirring blade holder 200 to release the pressure and manually resets the valve stem 400 to move upward to its initial position, the main unit 100 can be restarted.By adopting the above solution, the mechanical linkage between the valve stem 400 and the magnet 500, combined with the electrical detection of the Hall switch 101, enables real-time monitoring of the internal pressure of the stirring space 301. It also automatically shuts down when the pressure exceeds the limit, preventing the risk of explosion or leakage due to excessive pressure. The Hall switch 101 detects changes in the magnetic field, avoiding direct contact between the circuit and the high-pressure environment, thus improving safety. The valve stem 400 directly senses the pressure of the stirring space 301, eliminating the need for additional sensors, reducing costs and increasing reliability. The valve stem 400 must be manually reset before restarting, providing a reminder to the user and enhancing safety.

[0064] In some embodiments, the valve stem 400 includes a pressure-sensing surface 401 disposed near one end of the stirring space 301. When the pressure in the stirring space 301 exceeds a set value, the pressure-sensing surface 401 of the valve stem 400 is forced to move the magnet 500 downwards synchronously; the Hall switch 101 detects the signal from the magnet 500 and controls the host 100 to stop working. By adopting the above scheme, the pressure-sensing surface 401 has a larger force-bearing area, making it more sensitive to pressure changes and ensuring timely response to overpressure conditions.

[0065] In some embodiments, an elastic sealing ring 600 is provided between the stirring blade holder 200 and the valve stem 400. Using this solution, the elastic sealing ring 600 ensures the sealing of the stirring space 301, preventing leakage; while ensuring sealing, it allows axial movement of the valve stem 400, ensuring effective pressure transmission; furthermore, the elastic sealing ring 600 provides a reset force when the valve stem 400 is manually reset, helping the valve stem 400 return to its initial position. In some embodiments, the stirring blade holder 200 is provided with a mounting shaft hole 201 for mounting the valve stem 400, and the elastic sealing ring 600 is provided between the mounting shaft hole 201 and the valve stem 400. Using this solution, the mounting shaft hole 201 ensures accurate positioning of the valve stem 400, avoiding misalignment that could affect detection accuracy. In some embodiments, the elastic sealing ring 600 includes a first sealing portion 601 covering the valve stem 400, a second sealing portion 602 extending from the periphery of the bottom of the first sealing portion 601 toward the stirring space 301, and a third sealing portion 603 formed by the outer edge of the second sealing portion 602 extending radially. With this design, the elastic sealing ring 600 employs a three-layer structure, enhancing the sealing effect and preventing leakage in different directions; furthermore, the third sealing portion 603 is compressed and fixed through radial extension, preventing the elastic sealing ring 600 from falling off. In some embodiments, the valve stem 400 includes a stem head 402 and a stem body 403. The stem head 402 is adapted to the mounting shaft hole 201, and the stem body 403 is formed at the end of the stem head 402 away from the stirring space 301; furthermore, the shaft diameter of the stem body 403 is smaller than the diameter of the stem head 402, and the first sealing portion 601 covers the stem body 403. In some embodiments, the pressure-sensing surface 401 is formed at the top end of the rod head 402, and the rod body 403 includes a first rod portion 4031, a second rod portion 4032, and a third rod portion 4033 arranged from top to bottom; the axial diameter of the first rod portion 4031 is smaller than the axial diameter of the third rod portion 4033, and the second rod portion 4032 is a frustum-shaped structure connecting the first rod portion 4031 and the second rod portion 4032, and the top end of the second rod portion 4032 is axially smaller than that of the first rod portion 4033. The shaft diameter of 4031; the first sealing part 601 includes a first covering part 6011 covering the first rod part 4031, and a second covering part 6012 formed by the bottom end of the first covering part 6011 inclined outward and downward along the axial direction, the second covering part 6012 covering the second rod part 4032 and part of the third rod part 4033; the first rod part 4031 is connected to the rod head 402, and the bottom end of the third rod part 4033 is connected to the magnet 500.

[0066] In some embodiments, the end of the stirring blade holder 200 away from the stirring cup 300 is connected to a fixing frame 700. The fixing frame 700 has a receiving space 701 for accommodating the valve stem 400. The receiving space 701 is arranged vertically to avoid vertical movement of the valve stem 400 and the magnet 500. Furthermore, the third sealing part 603 is confined between the fixing frame 700 and the stirring blade holder 200. In some embodiments, the end of the stirring blade holder 200 away from the stirring space 301 extends downward around the periphery of the mounting shaft hole 201 to form a first extension wall 202, and the portion outside the mounting shaft hole 201 extends downward to form a second extension wall 203; the first extension wall 202 and the second extension wall 203 can restrict the radial displacement of the third sealing portion 603, the fixing frame 700 partially extends between the first extension wall 202 and the second extension wall 203 and can restrict the axial displacement of the third sealing portion 603, and the outer wall of the first extension wall 202 and the inner wall of the fixing frame 700 can fix the second sealing portion 602. In some embodiments, the end of the stirring blade holder 200 away from the stirring space 301 is also provided with two fixing posts 204, and the fixing frame 700 is provided with fixing holes 702 that can cooperate with the two fixing posts 204. Using the above scheme, the stirring blade holder 200 restricts the radial / axial displacement of the elastic sealing ring 600 through the fixing frame 700. The fixing frame 700, together with the first extension wall 202 and the second extension wall 203, fixes the elastic sealing ring 600, preventing it from loosening or shifting.

[0067] In some embodiments, a circuit board 102 is provided inside the host 100, and a Hall switch 101 is electrically connected to the circuit board 102. When the Hall switch 101 detects a signal from the magnet 500, it sends a signal to the circuit board 102 to control the power cut-off, and the host 100 stops working. Using this scheme, the Hall switch 101 is connected to the circuit board 102, and cuts off the power after detecting a signal. The electrical signal directly controls the circuit board 102 to shut down, resulting in a rapid shutdown response. The integration of the Hall switch 101 and the circuit board 102 reduces external wiring and lowers the failure rate. In some embodiments, the Hall switch 101 is connected to the end of the circuit board 102 closest to the magnet 500. In some embodiments, a host cover 103 is provided at the top of the host 100. A first engaging groove 1031 for engaging the circuit board 102 is provided at one end of the host cover 103 near the host 100. A second engaging groove 1032 for engaging the Hall switch 101 is provided at the same end of the host cover 103 near the first engaging groove 1031. Furthermore, the ends of the first engaging groove 1031 and the second engaging groove 1032 that are close to each other are interconnected. With this design, the second engaging groove 1032 ensures that the Hall switch 101 is aligned with the magnet 500, improving detection accuracy. Moreover, the arrangement of the first engaging groove 1031 and the second engaging groove 1032 prevents displacement or poor contact caused by vibration of the circuit board 102 and the Hall switch 101.

[0068] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0069] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A blender characterized by: include Host (100); A stirring blade holder (200) is attached to the top of the main unit (100); A stirring cup (300) is assembled on the stirring blade holder (200) and forms a closed stirring space (301). A valve stem (400) is connected to the stirring blade holder (200). The valve stem (400) can move up and down along the axial direction. One end of the valve stem (400) passes through the stirring blade holder (200) so that one end of the valve stem (400) is always in contact with the air in the stirring space (301). A magnet (500) is connected to one end of the valve stem (400) away from the stirring space (301), and the magnet (500) can move synchronously with the valve stem (400). A Hall switch (101) is provided inside the host (100) directly below the magnet (500) for detecting the position state of the magnet (500); When the pressure in the stirring space (301) is normal, the valve stem (400) and the magnet (500) are in their initial positions, the Hall switch (101) does not detect the trigger signal of the magnet (500), and the host (100) continues to work; When the pressure in the stirring space (301) exceeds the set value, the valve stem (400) drives the magnet (500) to move to the trigger position, and the Hall switch (101) detects the signal of the magnet (500) and controls the host (100) to stop working.

2. The blender of claim 1, wherein: The valve stem (400) includes a pressure sensing surface (401) located near the stirring space (301). When the pressure in the stirring space (301) exceeds a set value, the pressure sensing surface (401) of the valve stem (400) is forced to move the magnet (500) synchronously to the trigger position. The Hall switch (101) detects the signal from the magnet (500) and controls the host (100) to stop working.

3. The blender of claim 1, wherein: An elastic sealing ring (600) is provided between the stirring blade holder (200) and the valve stem (400).

4. The blender of claim 3, wherein: The stirring blade holder (200) is provided with a mounting shaft hole (201) for mounting the valve stem (400), and the elastic sealing ring (600) is provided between the mounting shaft hole (201) and the valve stem (400).

5. The blender of claim 4, wherein: The elastic sealing ring (600) includes a first sealing portion (601) covering the valve stem (400), a second sealing portion (602) extending from the periphery of the bottom of the first sealing portion (601) toward the stirring space (301), and a third sealing portion (603) formed by the outer edge of the second sealing portion (602) extending radially.

6. The blender of claim 5, wherein: The valve stem (400) includes a stem head (402) and a stem body (403). The stem head (402) is adapted to the mounting shaft hole (201). The stem body (403) is formed at the end of the stem head (402) away from the stirring space (301). Furthermore, the shaft diameter of the stem body (403) is smaller than the diameter of the stem head (402). The first sealing part (601) covers the stem body (403).

7. The blender of claim 5, wherein: The stirring blade holder (200) is connected to a fixing frame (700) at one end away from the stirring cup (300), and the fixing frame (700) has a receiving space (701) for receiving the valve stem (400); and the third sealing part (603) is confined between the fixing frame (700) and the stirring blade holder (200).

8. The blender of claim 1, wherein: The host (100) is equipped with a circuit board (102). The Hall switch (101) is electrically connected to the circuit board (102). When the Hall switch (101) detects the signal of the magnet (500), it sends a signal to the circuit board (102) to control the power cut-off, and the host (100) stops working.

9. The blender of claim 8, wherein: The Hall switch (101) is connected to one end of the circuit board (102) near the magnet (500).

10. The blender of claim 9, wherein: The top of the host (100) is provided with a host cover (103). The host cover (103) near the host (100) is provided with a first engagement groove (1031) for engaging the circuit board (102). The host cover (103) near the first engagement groove (1031) is provided with a second engagement groove (1032) for engaging the Hall switch (101). Furthermore, the ends of the first engagement groove (1031) and the second engagement groove (1032) that are close to each other are interconnected.

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