Reagent stirring device

Abstract

The utility model relates to a reagent stirring device and relates to the technical field of test tube stirring. The utility model discloses a reagent stirring device which comprises a base, the shell is mounted above the base, a mounting structure is arranged on the shell, a test tube can be inserted into the mounting structure, a cavity is defined by the shell and the base, and the cavity surrounds the mounting structure; the magnetic stirring rod is provided with two magnetic poles which are oppositely arranged in the length direction of the magnetic stirring rod, and the magnetic stirring rod is used for being placed in a test tube; the stator is mounted in the cavity and surrounds the mounting structure, and the stator is used for generating a driving magnetic field surrounding the mounting structure and can adjust the direction of the driving magnetic field so as to drive the magnetic stirring rod in the test tube to rotate. On the premise of stirring a reagent in a test tube, the size of the reagent stirring device can be reduced, and noise generated when the reagent stirring device works is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of test tube stirring, in particular to a reagent stirring device. Background Art

[0002] In order to fully stir the reagents in the test tube, the related art provides a reagent stirring device, which puts magnetic beads in the test tube, uses a motor to drive the magnet outside the test tube to selectively drive the magnetic beads in the test tube to rotate, and thus uses the magnetic beads to stir the reagents in the test tube.

[0003] However, in order to use the motor to drive the magnet outside the test tube to rotate, the magnet needs to be installed on the rotating shaft of the motor, which makes the volume of the reagent stirring device larger. Utility Model Content

[0004] The utility model provides a reagent stirring device, which is used to solve the problem that the current reagent stirring device has a large volume.

[0005] The utility model provides a reagent stirring device, comprising:

[0006] Base;

[0007] A shell, the shell is installed above the base, the shell is provided with a mounting structure, the mounting structure is used for inserting a test tube, and the shell and the base form a chamber, the chamber surrounds the mounting structure;

[0008] a magnetic stirring bar having two magnetic poles arranged opposite to each other along its length, the magnetic stirring bar being used to be placed in the test tube; and,

[0009] The stator is installed in the chamber and surrounds the mounting structure. The stator is used to generate a driving magnetic field surrounding the mounting structure and can adjust the direction of the driving magnetic field to drive the magnetic stirring bar in the test tube to rotate.

[0010] In one embodiment, the mounting structure comprises a vertically extending barrel portion, the inner diameter of the barrel portion is equal to the outer diameter of the test tube, and a through hole is formed at the bottom of the barrel portion;

[0011] A positioning column is arranged on the base, the positioning column is inserted into the through hole, and the outer wall of the positioning column is in contact with the inner wall of the cylinder.

[0012] In one embodiment, the mounting structure further includes a guide portion disposed above the barrel, the guide portion forming a guide conical hole connected to the barrel, the inner diameter of the guide conical hole gradually decreasing from top to bottom, and the axis of the guide conical hole being colinear with the axis of the barrel.

[0013] In one embodiment, a soft pad is installed on the top of the positioning column, and the soft pad is used to be inserted into the barrel and contact the bottom of the test tube.

[0014] In one embodiment, the housing further comprises a frame-like structure, and the chamber is formed between the frame-like structure and the mounting structure;

[0015] A positioning baffle is arranged on the base. When the shell is installed on the base, the positioning baffle abuts against the frame structure to limit the rotation of the shell.

[0016] In one embodiment, the stator comprises an iron core having a plurality of mounting teeth surrounding the mounting structure in a circumferential direction, and the coils are mounted on the mounting teeth.

[0017] In one embodiment, the core is formed by stacking silicon steel sheets, wherein the stacking direction of the silicon steel sheets is along the axial direction of the mounting structure.

[0018] In one embodiment, a limiting protrusion is provided on the base, and the limiting protrusion surrounds the outside of the mounting structure along the circumference of the mounting structure to form a circular limiting groove, the diameter of the limiting groove is equal to the outer diameter of the stator, the stator is installed in the limiting groove, and the outer wall of the stator is in contact with the limiting protrusion.

[0019] In one embodiment, the surface of the magnetic stirring bar is provided with flow-interfering protrusions or flow-interfering grooves.

[0020] In one embodiment, the spoiler boss is hemispherical.

[0021] Compared with the prior art, the utility model has the advantage that, since the magnetic field is generated by electrifying the stator, the magnetic field with changing direction can be generated by adjusting the stator, thereby driving the magnetic stirring rod in the test tube to rotate, and completing the stirring of the reagent in the test tube. And since there is no need to set up components such as a motor or a rotating shaft, not only the space occupied by the motor shaft is saved, but also the test tube can be inserted into the mounting structure of the shell, further reducing the space occupied by the reagent stirring device in the height direction. At the same time, since there is no motor structure, the motor rotation noise will not be generated during use, and it is quieter during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the reagent stirring device in the embodiment of the utility model when in use;

[0024] Figure 2It is a schematic diagram of the top view of the reagent stirring device in the embodiment of the utility model when in use;

[0025] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the AA section;

[0026] Figure 4 It is a schematic diagram of a three-dimensional cross-sectional structure of the reagent stirring device in the embodiment of the utility model when in use;

[0027] Figure 5 It is a schematic diagram of the main structure of the reagent stirring device in the embodiment of the utility model when in use;

[0028] Figure 6 yes Figure 5 The schematic diagram of the cross-sectional structure at section BB;

[0029] Figure 7 It is a three-dimensional structural schematic diagram of the base in the embodiment of the utility model;

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the magnetic stirring bar in the embodiment of the utility model.

[0031] Reference numerals:

[0032] 1. Base; 11. Positioning column; 12. Positioning baffle; 13. Limiting protrusion;

[0033] 2. Shell; 21. Mounting structure; 211. Cylinder; 212. Guide; 22. Frame structure;

[0034] 3. Magnetic stirring rod; 31. Spoiler boss;

[0035] 4. stator; 41. iron core; 411. mounting teeth; 42. coil;

[0036] 5. Soft cushion;

[0037] 9. Test tube. DETAILED DESCRIPTION

[0038] The utility model will be further described below in conjunction with the accompanying drawings.

[0039] See also Figures 1 to 4 As shown, a reagent stirring device provided by the utility model comprises a base 1, a shell 2, a magnetic stirring rod 3 and a stator 4.

[0040] The housing 2 is mounted above the base 1. A mounting structure 21 is provided on the housing 2. The mounting structure 21 is used for inserting the test tube 9. The housing 2 and the base 1 form a chamber, and the chamber surrounds the mounting structure 21. The stator 4 is mounted in the chamber and surrounds the mounting structure 21. When in use, the stator 4 can generate a driving magnetic field surrounding the mounting structure 21 and can adjust the direction of the driving magnetic field.

[0041] Since the test tube 9 is inserted into the mounting structure 21 and the magnetic stirring bar 3 is placed in the test tube 9 during use, the magnetic stirring bar 3 is located in the driving magnetic field generated by the stator 4, so that the orientation of the magnetic stirring bar 3 corresponds to the direction of the driving magnetic field.

[0042] When stirring is required, the direction of the driving magnetic field can be switched by the stator 4 , thereby driving the magnetic stirring bar 3 in the test tube 9 to rotate, thereby completing the stirring of the object in the test tube 9 .

[0043] During use, only the magnetic stirring rod 3 will rotate, and it will not produce abnormal vibration noise like a motor during use, so the stirring process is quieter.

[0044] At the same time, since the rotation of the magnetic stirring bar 3 is not regulated by connecting the motor to the magnet, not only the motor is omitted, but also the motor shaft connected to the motor in the axial direction does not need to be provided, thereby reducing the size of the magnetic stirring bar in the height direction.

[0045] It should also be noted that, since the magnetic field is generated by energizing the stator 4, the magnetic field strength can be increased or decreased by changing the current passed through the stator 4. Therefore, when there are more reagents in the test tube 9, the magnetic force / repulsion on the magnetic stirring bar 3 can be increased by increasing the current of the stator 4. Compared with magnets with unadjustable magnetic fields, it can adapt to reagent stirring work in more scenarios.

[0046] See also Figure 3 As shown, the mounting structure 21 includes a vertically extending barrel 211, the inner diameter of which is equal to the outer diameter of the test tube 9. When in use, the test tube 9 can be inserted into the barrel 211 to prevent the test tube 9 from shaking during use.

[0047] A through hole is provided at the bottom of the barrel 211, and a positioning column 11 protruding upward is provided on the base 1. The positioning column 11 is inserted into the through hole, and the outer wall of the positioning column 11 fits with the inner wall of the barrel 211. In other words, the positioning column 11 can be inserted into the through hole at the bottom of the barrel 211 to improve the positioning accuracy between the base 1 and the mounting structure 21, thereby avoiding a large installation error between the stator 4 installed on the base 1 and the mounting structure 21.

[0048] See also Figure 3 and Figure 4As shown, in some implementations, the mounting structure 21 also includes a guide portion 212 disposed above the barrel 211, the guide portion 212 is formed with a guide conical hole connected to the barrel 211, the inner diameter of the guide conical hole gradually decreases from top to bottom, and the axis of the guide conical hole is colinear with the axis of the barrel 211.

[0049] It is understandable that when the test tube 9 is inserted into the mounting structure 21, the test tube 9 will first be inserted into the guide cone hole formed by the guide portion 212. Under the guidance of the tapered inner wall of the guide cone hole, the axis of the test tube 9 will eventually coincide with the axis of the barrel 211, so that the test tube 9 can be inserted into the barrel 211 more naturally. Compared with inserting the test tube 9 into the barrel 211, the provision of the guide portion 212 can reduce the difficulty of inserting the test tube 9 and facilitate use.

[0050] See also Figure 3 and Figure 4 As shown, a cushion 5 is installed on the top of the positioning column 11, and the cushion 5 is used to be inserted into the barrel 211 and contact the bottom of the test tube 9. By the cushion 5 contacting the bottom of the test tube 9, the risk of the test tube 9 being squeezed and damaged can be reduced compared to placing the test tube 9 on a hard object. A sponge with a hole structure can be used as the cushion 5, and the hole structure of the cushion 5 can be deformed to absorb the noise in the test tube 9 during stirring, thereby improving the user experience.

[0051] Among them, in order to facilitate the installation of the cushion 5 and prevent the cushion 5 from shifting during use, a depression is set at the top of the positioning column 11, and a protrusion is set at the bottom of the cushion 5. By inserting the protrusion at the bottom of the cushion 5 into the depression at the bottom of the positioning column 11, the cushion 5 is prevented from shifting, thereby ensuring the support of the cushion 5 for the test tube 9.

[0052] See also Figures 4 to 7 As shown, in some implementations, the shell 2 also includes a frame structure 22, a chamber is formed between the frame structure 22 and the mounting structure 21, and a positioning baffle 12 is provided on the base 1. When the shell 2 is installed on the base 1, the positioning baffle 12 is abutted against the frame structure to limit the rotation of the shell 2.

[0053] That is to say, in the present application, the shell 2 is prevented from rotating by the positioning baffle 12 that abuts against the frame structure 22, wherein the frame structure 22 can be a rectangular structure, and four positioning baffles 12 that match the four sides of the frame structure 22 can be set on the base 1, and each positioning baffle 12 abuts against a side surface of the frame structure 22, thereby preventing the frame structure 22 from rotating and improving the installation accuracy of the shell 2.

[0054] The positioning baffle 12 may be disposed on the inner side of the frame structure 22 to achieve a better modeling effect.

[0055] See also Figure 2 , Figure 3as well as Figure 7 As shown, in some implementations, the stator 4 includes an iron core 41, and the iron core 41 has a plurality of mounting teeth 411 surrounding the circumference of the mounting structure 21, and a coil 42 is mounted on the mounting teeth 411. By passing current through the coil 42 on the corresponding mounting teeth 411, a driving magnetic field is generated at the mounting teeth 411, thereby driving the magnetic stirring bar 3 in the test tube 9 to rotate.

[0056] The coil 42 may be formed by winding an enameled wire, and compared with a conventional conductive wire, the outer layer of the enameled wire has better insulation properties.

[0057] In the figure, the stator 4 includes three pairs of six mounting teeth 411 in total. Current can be sequentially supplied to the coils 42 on a pair of mounting teeth 411, so that opposite currents are formed at the mounting teeth 411 arranged opposite to each other. Then, by stopping supplying power to the coils 42 at the pair of mounting teeth 411 and switching to supplying power to the coils 42 at the other pair of mounting teeth 411, the effect of driving the magnetic field to rotate is generated, thereby driving the magnetic stirring bar 3 in the test tube 9 to rotate accordingly.

[0058] The rotation speed of the driving magnetic field can be controlled by changing the interval period between the two pairs of coils 42 , thereby controlling the rotation speed of the magnetic stirring bar 3 .

[0059] In some implementations, the iron core 41 is formed by stacking silicon steel sheets. The stacking direction of the silicon steel sheets is along the axial direction of the mounting structure 21. Since the silicon steel sheets are stacked, the generation of large eddy currents at the iron core 41 when the stator 4 generates a rotating driving magnetic field is avoided, and the heating of the iron core 41 is reduced.

[0060] In some implementations, the magnetic stirring bar 3 is a magnetic steel with good anti-demagnetization capability, and can be specifically made of one of an iron-chromium-cobalt permanent magnet alloy, a permanent magnet ferrite, and a rare earth permanent magnet material.

[0061] See also Figure 3 , Figure 4 and Figure 7 As shown, in some implementations, a limiting protrusion 13 is provided on the base 1, and the limiting protrusion 13 surrounds the outside of the mounting structure 21 along the circumference of the mounting structure 21 to form a circular limiting groove, the diameter of the limiting groove is equal to the outer diameter of the stator 4, the stator 4 is installed in the limiting groove, and the outer wall of the stator 4 is in contact with the limiting protrusion 13.

[0062] See also Figure 8 As shown, in some implementations, the surface of the magnetic stirring bar 3 is provided with some flow-disturbing bosses 31 or some flow-disturbing grooves. During the rotation of the magnetic stirring bar 3, the stirring effect can be enhanced by the flow-disturbing bosses 31 or the flow-disturbing grooves.

[0063] In some implementations, the spoiler boss 31 is hemispherical, which can increase the contact area and enhance the spoiler effect, and also does not produce a blade edge, making it easier to clean.

[0064] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A reagent stirring device, characterized in that: It includes: Base; A shell, the shell is installed above the base, the shell is provided with a mounting structure, the mounting structure is used for inserting a test tube, and the shell and the base form a chamber, the chamber surrounds the mounting structure; A magnetic stirring bar having two magnetic poles arranged opposite to each other along its length, the magnetic stirring bar being used to be placed in the test tube; as well as, a stator, which is installed in the chamber and surrounds the mounting structure, and is used to generate a driving magnetic field surrounding the mounting structure and can adjust the direction of the driving magnetic field to drive the magnetic stirring bar in the test tube to rotate; The mounting structure comprises a vertically extending barrel, the inner diameter of the barrel is equal to the outer diameter of the test tube, and a through hole is formed at the bottom of the barrel; The base is provided with a positioning column protruding upward, the positioning column is inserted into the through hole, and the outer wall of the positioning column is in contact with the inner wall of the cylinder.

2. The reagent stirring device according to claim 1, characterized in that: The mounting structure also includes a guide portion arranged above the barrel, the guide portion is formed with a guide tapered hole connected to the barrel, the inner diameter of the guide tapered hole gradually decreases from top to bottom, and the axis of the guide tapered hole is colinear with the axis of the barrel.

3. The reagent stirring device according to claim 1 or 2, characterized in that: A soft pad is installed on the top of the positioning column, and the soft pad is used to be inserted into the barrel and contact the bottom of the test tube.

4. The reagent stirring device according to claim 1 or 2, characterized in that: The housing further comprises a frame-like structure, and the chamber is formed between the frame-like structure and the mounting structure; A positioning baffle is arranged on the base. When the shell is installed on the base, the positioning baffle abuts against the frame structure to limit the rotation of the shell.

5. The reagent stirring device according to claim 1 or 2, characterized in that: The stator comprises an iron core having a plurality of mounting teeth surrounding the mounting structure in a circumferential direction, and coils are mounted on the mounting teeth.

6. The reagent stirring device according to claim 5, characterized in that: The iron core is formed by stacking silicon steel sheets, wherein the stacking direction of the silicon steel sheets is along the axial direction of the mounting structure.

7. The reagent stirring device according to any one of claims 1 to 2, characterized in that: A limiting protrusion is provided on the base, and the limiting protrusion surrounds the outside of the mounting structure along the circumference of the mounting structure to form a circular limiting groove, the diameter of the limiting groove is equal to the outer diameter of the stator, the stator is installed in the limiting groove, and the outer wall of the stator is in contact with the limiting protrusion.

8. The reagent stirring device according to any one of claims 1 to 2, characterized in that: The surface of the magnetic stirring bar is provided with some interfering flow bosses or some interfering flow grooves.

9. The reagent stirring device according to claim 8, characterized in that: The spoiler boss is hemispherical.

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