A magnetic stirrer

Abstract

This utility model discloses a magnetic stirrer, including a frame and a chassis located at the bottom of the frame. The chassis and frame together form a receiving cavity. The frame has an opening. Inside the receiving cavity, a power supply mainboard and a drive motor are arranged. The drive motor is connected to the power supply mainboard, which is mounted on the chassis. The power supply mainboard has a positioning groove. One end of the drive motor is located in the positioning groove, and the other end of the drive motor passes through the opening and connects to a magnet. A limiting member is fitted onto the magnet, with one end of the limiting member contacting the magnet and the other end of the limiting member having a heating element. The heating element is connected to the power supply mainboard and has a heating plate. A sealing ring is installed on the opening, with one end of the sealing ring contacting the top of the frame and the other end contacting the bottom of the limiting member. This utility model includes a sealing ring, which prevents external liquid from seeping into the receiving cavity, protecting the internal power supply mainboard and drive motor from liquid corrosion and extending the service life of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of magnetic stirrers, and more particularly to a magnetic stirrer. Background Technology

[0002] A magnetic stirrer is a laboratory instrument used for mixing liquids, primarily for stirring or simultaneously heating and stirring low-viscosity liquids or solid-liquid mixtures. Its basic principle is based on the property of magnetic fields repelling like poles and attracting unlike poles. A rotating magnetic field drives a magnetic stir bar placed in a container to rotate in a circular motion, thus achieving the purpose of stirring the liquid.

[0003] In the prior art, patent document CN222943348U discloses a magnetic stirrer, which adopts the following technical solution: it includes a magnet assembly and a heating assembly, with a heat insulation component disposed between the magnet assembly and the heating assembly. By adopting the above technical solution, the heat insulation component can reduce the probability of the heating function affecting the operation of the magnet, thereby improving the working efficiency of the magnetic stirrer.

[0004] Existing magnetic stirrers lack a sealing structure, allowing oil to easily seep into the stirrer's interior and affecting its lifespan. Therefore, it is necessary to improve this structure to overcome these shortcomings. Utility Model Content

[0005] The purpose of this invention is to provide a magnetic stirrer that solves the problem that existing magnetic stirrers lack a sealing structure, allowing oil to easily penetrate the interior of the stirrer and affecting its service life.

[0006] The above-mentioned technical objective of this utility model is achieved by the following technical solution:

[0007] A magnetic stirrer includes a frame and a chassis located at the bottom of the frame. The chassis and frame together form a receiving cavity. An opening is provided on the frame, which communicates with the receiving cavity. A power supply main board and a drive motor are arranged inside the receiving cavity. The drive motor is connected to the power supply main board, which is mounted on the chassis. A positioning groove is provided on the power supply main board. One end of the drive motor is located in the positioning groove, and the other end of the drive motor passes through the opening and is connected to a magnet. The drive motor is used to drive the magnet to rotate. A limiting member is fitted on the magnet. One end of the limiting member contacts the magnet, and a heating element is provided on the other end of the limiting member. The heating element is connected to the power supply main board and has a heating plate. A sealing ring is installed on the opening. One end of the sealing ring contacts the top of the frame, and the other end of the sealing ring contacts the bottom of the limiting member.

[0008] A further feature of this invention is that the chassis is provided with a plurality of support feet, one end of which is connected to the bottom surface of the chassis, and the other end of which extends outward toward the chassis.

[0009] A further feature of this invention is that a plurality of positioning posts are provided on the chassis, one end of each positioning post is connected to the top surface of the chassis, and the other end of each positioning post extends toward the interior of the chassis. The positioning posts are used to limit the power supply of the motherboard.

[0010] A further feature of this invention is that the top end of the sealing ring is provided with a chamfered portion, which contacts and fits against the bottom of the limiting member; the bottom end of the sealing ring is provided with a support portion, which contacts and fits against the top of the frame.

[0011] A further feature of this invention is that a control panel is provided on the frame, the control panel is embedded in the frame, and control buttons are installed on the control panel.

[0012] A further feature of this invention is that the frame has multiple mounting slots, and power interfaces and sensor interfaces are provided in the mounting slots. Both the power interfaces and sensor interfaces are connected to the power motherboard.

[0013] In summary, this utility model has the following beneficial effects:

[0014] The sealing ring fits tightly against the bottom of the limiting component through the chamfered part and against the top of the frame through the support foot, effectively sealing the gap between the frame and the limiting component, preventing external liquid from seeping into the receiving cavity, protecting the internal power main board and drive motor from liquid corrosion, and extending the service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0019] Numerical designations: 1. Frame; 2. Chassis; 3. Power Mainboard; 4. Drive Motor; 5. Positioning Slot; 6. Magnet; 7. Limiting Component; 8. Heating Component; 9. Heating Plate; 10. Support Leg; 11. Positioning Column; 12. Sealing Ring; 13. Control Panel; 14. Control Button; 15. Power Interface; 16. Sensor Interface; 17. Fixing Hole 1; 18. Fixing Hole 2; 19. Chamfered Part; 20. Support Part. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0021] In existing technologies, magnetic stirrers generally suffer from insufficient sealing. Inadequate sealing can easily lead to moisture or contamination of internal electronic components. For example, traditional magnetic stirrers lack effective isolation between the drive and heating components, making them prone to liquid infiltration, which affects equipment stability and lifespan. To address these issues, the drive motor and heating element are spatially separated, and a sealing structure is incorporated at the connection point.

[0022] like Figures 1 to 4 As shown, the present invention proposes a magnetic stirrer, including a frame 1 and a base 2 disposed at the bottom of the frame 1. The base 2 and the frame 1 together form a receiving cavity. The frame 1 has an opening that communicates with the receiving cavity. Inside the receiving cavity, a power supply main board 3 and a drive motor 4 are disposed. The drive motor 4 is connected to the power supply main board 3. The power supply main board 3 is mounted on the base 2. The power supply main board 3 has a positioning groove 5. One end of the drive motor 4 is located in the positioning groove 5, and the other end of the drive motor 4 passes through the opening and is connected to a magnet 6. The drive motor 4 is used to drive the magnet 6 to rotate. A limiting member 7 is sleeved on the magnet 6. One end of the limiting member 7 contacts the magnet 6, and the other end of the limiting member 7 is provided with a heating element 8. The heating element 8 is connected to the power supply main board 3 and is provided with a heating plate 9. A sealing ring 12 is installed on the opening. One end of the sealing ring 12 contacts the top of the frame 1, and the other end of the sealing ring 12 contacts the bottom of the limiting member 7.

[0023] The positioning groove 5 refers to the recessed structure on the power mainboard 3 used to limit the position of the drive motor 4. Specifically, it can be a circular groove, and its function is to ensure the precise installation position of the drive motor 4. The limiting member 7 is made of high-temperature resistant plastic or metal material, and it is used to provide support for the heating element 8. The sealing ring 12 is a sealing element installed at the opening, and its function is to close the gap between the frame 1 and the limiting member 7 to prevent liquid from entering the receiving cavity.

[0024] Specifically, the drive motor 4 is fixed to the power mainboard 3 via the positioning groove 5. When the drive motor 4 runs, it drives the magnet 6 to rotate, and the magnet 6 drives the external stirrer to move through the magnetic field. The heating element 8 generates heat after being powered on, which is transferred to the heating plate 9 through the limiting member 7 to achieve uniform heating of the container. The sealing ring 12 forms a seal between the top of the frame 1 and the bottom of the limiting member 7, preventing external liquid from seeping into the container cavity and protecting the internal power mainboard 3 and drive motor 4.

[0025] The chassis 2 is equipped with multiple support feet 10. One end of each support foot 10 is connected to the bottom surface of the chassis 2, and the other end extends outward from the chassis 2. The support foot 10 is a structural component extending from the bottom surface of the chassis 2, and can be made of elastic or rigid materials, such as rubber blocks or metal feet. Its function is to provide support to the chassis 2 and distribute the weight of the equipment. The outward extension of the support feet 10 from the chassis 2 increases the contact area with the contact surface, thereby improving the stability of the equipment when placed.

[0026] The chassis 2 is equipped with multiple positioning posts 11. One end of each positioning post 11 is connected to the top surface of the chassis 2, and the other end extends into the chassis 2. The positioning posts 11 are used to limit the movement of the main power supply board. Each positioning post 11 is a columnar structure fixed to the top surface of the chassis 2 and can be integrated with the chassis 2 by welding, bolting, or integral molding. By engaging the positioning posts 11 with the edge or pre-set notch of the main power supply board 3, mechanical constraints are used to prevent the main power supply board 3 from shifting, thereby ensuring the reliable connection between the main power supply board 3 and the drive motor 4.

[0027] The sealing ring 12 has a chamfered portion 19 at its top, which contacts and fits against the bottom of the limiting member 7. The sealing ring 12 also has a support portion 20 at its bottom, which contacts and fits against the top of the frame 1. The chamfered portion 19 refers to the beveled structure formed at the top edge of the sealing ring 12, which increases the contact area and guides the bottom of the limiting member 7 to fit tightly against the sealing ring 12. The support portion 20 is an annular protrusion at the bottom of the sealing ring 12, which can be achieved using a one-piece molding process. The support portion 20 disperses the pressure on the sealing ring 12, preventing deformation.

[0028] A control panel 13 is mounted on the rack 1 and embedded within the rack 1. Control buttons 14 are installed on the control panel 13. The control panel 13 is a planar structure integrating operating elements, used to centrally arrange the control buttons 14 and form an operating interface. The control buttons 14 are mechanical operating buttons that trigger the on / off state of the circuit.

[0029] The rack 1 has multiple mounting slots, each housing a power interface 15 and a sensor interface 16, both of which connect to the power supply motherboard 3. The mounting slots are recessed structures on the surface of the rack 1, used to fix the positions of the power interface 15 and the sensor interface 16. The power interface 15 is a conductive component for connecting to an external power source, which can be a standard socket or a USB interface, providing power input to the power supply motherboard 3. The sensor interface 16 is a signal transmission component for connecting external sensors, transmitting sensor signals to the power supply motherboard 3.

[0030] The chassis 2 has multiple fixing holes 17, and the frame 1 has multiple fixing holes 18 that match the fixing holes 17. Fixing bolts pass through the fixing holes 17 and extend into the fixing holes 18 to mount the chassis 2 onto the frame 1. Fixing hole 17 refers to a through hole on the chassis 2, which can be implemented using a countersunk circular hole structure, used to cooperate with the fixing bolts to position the chassis 2 and the frame 1. Fixing hole 18 refers to a threaded hole on the frame 1, used to form a threaded connection with the fixing bolts.

[0031] The usage process of this utility model is as follows: Place the container to be stirred and heated on the heating plate 9, ensuring that the bottom of the container is in full contact with the heating plate 9 to guarantee the heating effect. Start the drive motor 4 via the control button 14 on the control panel 13. The drive motor 4 drives the magnet 6 to rotate, and the magnet 6 drives the stir bar inside the external container through the magnetic field, thus stirring the liquid inside the container. Again, energize the heating element 8 via the control button 14. The heating element 8 generates heat, which is transferred to the heating plate 9 through the limiting member 7, thereby uniformly heating the container. Adjust the speed of the drive motor 4 using the control button 14 to control the stirring speed; adjust the temperature of the heating element 8 to control the heating power, meeting the stirring and heating requirements of different experimental or production processes. After stirring and heating are complete, turn off the drive motor 4 and the heating element 8 via the control button 14. After the equipment cools down, remove the container, clean the surface of the equipment and the heating plate 9 of any residue, and keep the equipment clean.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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. In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0033] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A magnetic stirrer, comprising a frame and a chassis disposed at the bottom of the frame, the chassis and the frame together forming a receiving cavity, the frame having an opening communicating with the receiving cavity, a power supply mainboard and a drive motor disposed inside the receiving cavity, the drive motor being connected to the power supply mainboard, characterized in that, The power supply motherboard is mounted on the chassis. A positioning groove is provided on the power supply motherboard. One end of the drive motor is located in the positioning groove, and the other end of the drive motor passes through the opening and is connected to the magnet. The drive motor is used to drive the magnet to rotate. A limiting member is fitted on the magnet. One end of the limiting member is in contact with the magnet, and a heating element is provided on the other end of the limiting member. The heating element is connected to the power supply motherboard and a heating plate is provided on the heating element. A sealing ring is installed on the opening. One end of the sealing ring is in contact with the top of the frame, and the other end of the sealing ring is in contact with the bottom of the limiting member.

2. A magnetic stirrer according to claim 1, characterized in that, The chassis is provided with multiple support feet, one end of which is connected to the bottom surface of the chassis, and the other end of which extends outward toward the chassis.

3. A magnetic stirrer according to claim 1, characterized in that, The chassis is provided with multiple positioning posts. One end of each positioning post is connected to the top surface of the chassis, and the other end of each positioning post extends toward the interior of the chassis. The positioning posts are used to limit the power supply of the motherboard.

4. A magnetic stirrer according to claim 1, characterized in that, The top end of the sealing ring is provided with a chamfered portion, and the sealing ring contacts and fits against the bottom of the limiting member through the chamfered portion. The bottom end of the sealing ring is provided with a support portion, and the sealing ring contacts and fits against the top of the frame through the support portion.

5. A magnetic stirrer according to claim 1, characterized in that, The rack is equipped with a control panel, which is embedded in the rack and has control buttons installed on it.

6. A magnetic stirrer according to claim 1, characterized in that, The frame has multiple mounting slots, and each mounting slot contains a power interface and a sensor interface, both of which are connected to the power motherboard.

7. A magnetic stirrer according to claim 1, characterized in that, The chassis is provided with multiple fixing holes 1, and the frame is provided with multiple fixing holes 2 that match the fixing holes 1. The fixing bolts pass through the fixing holes 1 and extend into the fixing holes 2 to install the chassis on the frame.

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