CN220328484U - Reagent oscillation device - Google Patents

Abstract

The utility model discloses a reagent oscillation device, which belongs to the technical field of reagent treatment and comprises a supporting seat, a magnetic core structure, a bearing plate and a return component, wherein the magnetic core structure comprises a bracket and a magnetic component, the magnetic component is movably connected with the bracket, a coil is arranged on the bracket, the supporting seat is fixedly connected with the bracket or the magnetic component, and the magnetic component or the bracket can be driven to move by the magnetic field change provided by the coil; the bearing plate is connected with the movable one of the bracket and the magnetic assembly and is used for bearing the reagent container; the return assembly is arranged between the bearing plate and the supporting seat and comprises a plurality of elastic pieces, and each elastic piece is uniformly arranged at intervals around the circumference of the bearing plate. Under the condition that the coil is electrified, the magnetic field provided by the coil is changed to drive the bracket or the magnetic component to move, and the bearing plate moves along with the bracket or the magnetic component, so that reagents in the reagent container are uniformly mixed; after the oscillation is completed, the elastic force of each elastic piece enables the bearing plate to return.

Description

Reagent oscillation device

Technical Field

The utility model relates to the technical field of reagent treatment, in particular to a reagent oscillating device.

Background

In fields of chemical industry, pharmacy, biotechnology and the like, the reagent is mixed uniformly frequently in the experimental process. In the traditional experimental process, the mixing device adopts stirring rods to stir evenly, and a pipetting needle sucks and spits repeatedly or coils and magnets interact to generate oscillation. Through the magnetic force oscillation device to current, under the general condition, reagent holds in the reagent template, makes reagent template vibration through coil and magnet interact, and the position of reagent template constantly changes promptly, after the vibration is accomplished, and reagent template can not return, and during follow-up pipetting, the pipette tip can't be with reagent template accurate counterpoint.

Disclosure of Invention

The utility model aims to provide a reagent oscillation device which solves the technical problem that a reagent template cannot return after magnetic oscillation in the prior art is completed.

The technical scheme adopted by the utility model is as follows:

a reagent oscillation device comprising:

a support base;

the magnetic core structure comprises a bracket and a magnetic component, wherein the magnetic component is movably connected with the bracket, a coil is arranged on the bracket, the supporting seat is fixedly connected with the bracket or the magnetic component, and the magnetic component or the bracket can be driven to move by the magnetic field change provided by the coil;

a carrier plate coupled to a movable one of the rack and the magnetic assembly, the carrier plate for carrying a reagent container;

the return assembly is arranged between the bearing plate and the supporting seat and comprises a plurality of elastic pieces, and the elastic pieces are uniformly arranged at intervals around the circumference of the bearing plate.

The bearing plate is arranged above the supporting seat, the elastic piece is a tower spring, and the diameter of the tower spring gradually increases from one end close to the bearing plate to one end far away from the bearing plate.

The return assembly further comprises a rocker, the rocker penetrates through the tower spring, the large-diameter end of the tower spring is fixed with the supporting seat, the top end of the rocker is connected with the bearing plate, and the rocker can shake along with the small-diameter end of the tower spring.

The bottom end of the rocker is provided with a limiting head, and the limiting head penetrates through the large-diameter end of the tower spring and is limited to be separated from the small-diameter end of the tower spring.

Wherein the outer surface of the limiting head is an arc-shaped surface.

Wherein, the support encloses into middle part hollow installation space, magnetic component sets up in the installation space.

The magnetic assembly comprises a support column, a connecting plate sleeved on the support column and a magnet arranged on the connecting plate, and the connecting plate is in sliding connection with the support.

The three connecting plates are arranged at intervals along the supporting columns, and the magnets are arranged between the adjacent connecting plates.

The support is provided with a guide hole communicated with the installation space, and the connecting plate in the middle is inserted into the guide hole and can slide along the guide hole.

The support is provided with a plurality of coils, the coils are arranged around the circumference of the support at intervals, the magnet is a circular magnet, and the magnet is sleeved on the support column.

The support seat is fixedly connected with the support, the magnetic field provided by the coil can drive the magnetic assembly to move, and the bearing plate is connected with the magnetic assembly.

The utility model has the beneficial effects that:

according to the reagent oscillating device provided by the utility model, under the condition that the coil is electrified, the magnetic field provided by the coil can drive the bracket or the magnetic component to move; the bearing plate is connected with the movable one of the bracket and the magnetic component, so that the bearing plate moves along with the movable one of the bracket and the magnetic component, and the reagent in the reagent container on the bearing plate is uniformly mixed; after the oscillation is completed, the elastic force applied to the bearing plate by each elastic piece enables the bearing plate to return under the action of the elastic piece, so that the automatic return is realized, and the subsequent process is facilitated.

Drawings

FIG. 1 is a schematic diagram of a reagent oscillation device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing an exploded structure of a reagent oscillation device according to an embodiment of the present utility model;

FIG. 3 is a schematic structural diagram of a magnetic core structure according to an embodiment of the present utility model;

FIG. 4 is a top view of a magnetic core structure provided by an embodiment of the present utility model;

FIG. 5 is a schematic view of a portion of a magnetic core structure according to an embodiment of the present utility model;

FIG. 6 is an exploded view of a magnetic core structure provided in an embodiment of the present utility model;

FIG. 7 is a schematic illustration of an exploded view of a return assembly provided by an embodiment of the present utility model;

FIG. 8 is an exploded view of a spacing assembly provided in an embodiment of the present utility model;

FIG. 9 is a top view of a reagent oscillation device according to an embodiment of the present utility model;

FIG. 10 is a cross-sectional view taken along A-A of FIG. 9;

FIG. 11 is a cross-sectional view of a magnetic core structure provided by an embodiment of the present utility model;

FIG. 12 is a B-B cross-sectional view of FIG. 9;

FIG. 13 is a sectional view showing a part of the structure of a reagent oscillation device according to an embodiment of the present utility model;

FIG. 14 is a C-C cross-sectional view of FIG. 9;

FIG. 15 is a second cross-sectional view showing a part of the structure of a reagent oscillation device according to an embodiment of the present utility model;

fig. 16 is a partial cross-sectional view of a support base provided by an embodiment of the present utility model.

In the figure:

11. a support base; 111. a receiving groove; 112. a limiting hole; 113. a first limit groove;

20. a magnetic core structure; 21. a bracket; 211. a mounting position; 212. a guide hole; 22. a magnetic assembly; 221. a support column; 222. a connecting plate; 223. a magnet; 23. a coil;

31. a carrying plate; 32. a limiting block; 33. a connecting rod;

40. a return assembly; 41. an elastic member; 42. a rocker; 421. a positioning head; 43. a limiting plate;

50. a limit component; 51. a support part; 511. a support rod; 512. a roller; 52. an elastic part;

61. positioning columns;

71. and a rubber pad.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 1 to 16, an embodiment of the present utility model provides a reagent oscillation device, including a supporting seat 11, a magnetic core structure 20, a bearing plate 31 and a return component 40, where the magnetic core structure 20 includes a support 21 and a magnetic component 22, the magnetic component 22 is movably connected with the support 21, a coil 23 is disposed on the support 21, the supporting seat 11 is fixedly connected with the support 21 or the magnetic component 22, and a magnetic field provided by the coil 23 is changed to drive the magnetic component 22 or the support 21 to move; the bearing plate 31 is connected with the movable one of the bracket 21 and the magnetic assembly 22, and the bearing plate 31 is used for bearing the reagent container; the return assembly 40 is disposed between the carrier 31 and the supporting seat 11, and the return assembly 40 includes a plurality of elastic members 41, where each elastic member 41 is uniformly spaced around the circumference of the carrier 31.

With the coil 23 energized, the magnetic field provided by the coil 23 changes to drive the cradle 21 or the magnetic assembly 22 to oscillate; since the carrying plate 31 is connected with the movable one of the bracket 21 and the magnetic assembly 22, the carrying plate 31 moves together, so that the reagent in the reagent container on the carrying plate 31 is uniformly mixed; after the oscillation is completed, the elastic members 41 apply elastic force to the bearing plate 31, so that the bearing plate 31 can return under the action of the elastic members 41, and automatic return is realized, thereby facilitating subsequent processes.

In this embodiment, the reagent oscillation device includes a supporting seat 11, a magnetic core structure 20, a bearing plate 31 and a return component 40, where the magnetic core structure 20 includes a support 21 and a magnetic component 22, the support 21 is fixedly connected with the supporting seat 11, the magnetic component 22 is movably connected with the support 21, a coil 23 is arranged on the support 21, and a magnetic field provided by the coil 23 changes to drive the magnetic component 22 to oscillate; the bearing plate 31 is fixedly connected with the magnetic assembly 22, and the bearing plate 31 is used for bearing a reagent container; the return assembly 40 is disposed between the carrier 31 and the supporting seat 11, and the return assembly 40 includes a plurality of elastic members 41, where each elastic member 41 is uniformly spaced around the circumference of the carrier 31.

With the coil 23 energized, the magnetic field provided by the coil 23 varies to drive the magnetic assembly 22 into oscillation; because the bearing plate 31 is fixedly connected with the magnetic component 22, the bearing plate 31 moves along with the magnetic component 22, so that the reagents in the reagent containers on the bearing plate 31 are uniformly mixed; after the oscillation is completed, the elastic members 41 apply elastic force to the bearing plate 31, so that the bearing plate 31 can return under the action of the elastic members 41, and automatic return is realized, thereby facilitating subsequent processes.

Wherein the reagent container may be an orifice plate or a kit. A plurality of limiting blocks 32 are arranged on the bearing plate 31, and each limiting block 32 is arranged around the circumference of the bearing plate 31 at intervals and surrounds to form a containing space. When in use, the reagent container is placed on the bearing plate 31, so that the reagent container is positioned between the limiting blocks 32, and the reagent container is prevented from sliding down during oscillation. In this embodiment, the carrying plate 31 extends in the horizontal direction, so that the reagent container oscillates substantially in the horizontal direction, and the amplitude of oscillation is set according to actual needs, preventing reagent from being spilled. The limiting blocks 32 are arranged in four and distributed on four corners of the bearing plate 31.

In the present embodiment, the elastic member 41 extends in the vertical direction. Specifically, the supporting seat 11 is located below the bearing plate 31, one end of the elastic member 41 is connected to the bearing plate 31, and the other end of the elastic member 41 is inserted into the supporting seat 11. During the oscillation of the carrier plate 31, the elastic member 41 is elastically deformed, and after the oscillation is completed, the carrier plate 31 can return by the elastic restoring force of the elastic member 41.

In other embodiments, the elastic member 41 may extend in the horizontal direction. Specifically, the top of the supporting seat 11 is provided with a containing space, the bearing plate 31 is located in the containing space, one end of the elastic member 41 is connected with the bearing plate 31, and the other end of the elastic member 41 is connected with the inner wall of the containing space. The carrier plate 31 can oscillate in the accommodating space, the elastic member 41 is elastically deformed during the oscillation of the carrier plate 31, and after the oscillation is completed, the carrier plate 31 can return by the elastic restoring force of the elastic member 41.

Depending on the interaction between the coil 23 and the magnetic assembly 22, it may be: the support 21 is fixedly connected with the support seat 11, the magnetic field change provided by the coil 23 can drive the magnetic assembly 22 to move, and the bearing plate 31 is connected with the magnetic assembly 22; it is also possible that: the magnetic assembly 22 is fixedly connected with the supporting seat 11, the magnetic field provided by the coil 23 can drive the bracket 21 to move, and the bearing plate 31 is connected with the bracket 21.

In this embodiment, the support 21 is fixedly connected to the support 11, the magnetic field provided by the coil 23 can drive the magnetic assembly 22 to move, and the carrier plate 31 is fixedly connected to the magnetic assembly 22.

The coils 23 and the magnetic unit 22 may be both formed by winding a plurality of coils 23 around the outer periphery of the magnetic unit 22, or may be formed by winding the magnetic unit 22 around the outer periphery of the coils 23. In this embodiment, the bracket 21 encloses a hollow installation space in the middle, and the magnetic component 22 is disposed in the installation space.

The magnetic assembly 22 comprises a support column 221, a connecting plate 222 sleeved on the support column 221 and a magnet 223 arranged on the connecting plate 222, wherein the connecting plate 222 is in sliding connection with the bracket 21. The carrier plate 31 is connected to the magnetic assembly 22, specifically, the carrier plate 31 is connected to the support columns 221. Under the condition that the coil 23 is electrified, the magnetic field provided by the coil 23 can drive the magnet 223 to move, and as the magnet 223 is arranged on the connecting plate 222, the connecting plate 222 is driven to move, the connecting plate 222 is sleeved on the supporting column 221, the supporting column 221 is driven to move, the connecting plate 222 is in sliding connection with the support 21, the support 21 provides a moving space for the connecting plate 222, the bearing plate 31 is connected with the supporting column 221, and then the bearing plate 31 is moved.

The bracket 21 and the supporting seat 11 can be connected through bolts. In the present embodiment, the supporting seat 11 is provided with a receiving groove 111, and the bracket 21 is disposed at the receiving groove 111. Since the accommodating groove 111 is formed in the middle position of the supporting seat 11, the magnetic force applied by the magnetic assembly 22 to the bearing plate 31 is uniform, and accordingly, the initial position of the bearing plate 31 is located in the middle position of the supporting seat 11, and after the oscillation is completed, the bearing plate 31 returns to the initial position.

The bearing plate 31 and the supporting columns 221 may be connected by a connection rod 33. Specifically, the support column 221 is provided with a threaded hole, the connecting rod 33 passes through the bearing plate 31 to be connected with the threaded hole, and one end of the connecting rod 33 is provided with a limiting part, so that the bearing plate 31 cannot be separated. Specifically, the connection rod 33 may employ a screw.

The connection plate 222 may be provided one, and a magnet 223 is provided at an upper side of the connection plate 222. The connection plates 222 may be provided in two, and a magnet 223 is provided between the two connection plates 222 and at an upper side of the connection plate 222 located above. In the present embodiment, three connection plates 222 are provided at intervals along the support column 221, and magnets 223 are provided between adjacent connection plates 222. The upper connecting plate 222 is lapped on the top of the bracket 21, the middle connecting plate 222 is in sliding connection with the bracket 21, the lower connecting plate 222 is positioned at the bottom of the bracket 21, and the three connecting plates 222 can keep stability of movement.

Specifically, the bracket 21 is provided with a guide hole 212 communicating with the installation space, and a connecting plate 222 located in the middle is inserted into the guide hole 212 and can slide along the guide hole 212. The support 21 provides a moving space for the connecting plate 222, and the guide holes 212 play a limiting role on the connecting plate 222 to prevent the magnetic assembly 22 from being greatly displaced.

The holder 21 is provided with a plurality of coils 23, and the respective coils 23 are arranged at intervals around the circumference of the holder 21. In this embodiment, the magnet 223 is a ring-shaped magnet, and the magnet 223 is sleeved on the support column. The circular ring-shaped magnet can ensure stress uniformity, and the arrangement of the bracket 21, the magnetic component 22 and the coil 23 enables the structure to be compact and occupies small space. Each coil 23 is independently controlled, so that during use, some coils 23 may be energized, some coils 23 may not be energized, or some coils 23 may be intermittently energized.

In the present embodiment, four mounting locations 211 are provided on the bracket 21, the four mounting locations 211 being disposed at uniform intervals around the mounting space, and each mounting location 211 being provided with one coil 23. That is, the angle between the adjacent two coils 23 is 90 degrees. For convenience of description, the four coils 23 are respectively called a first coil, a second coil, a third coil and a fourth coil in a clockwise direction, and when the first coil and the third coil are alternately energized, a magnetic force generated in a connection line direction of the first coil and the third coil can drive the carrier plate 31 to vibrate reciprocally in a front-rear direction, and similarly, when the second coil and the fourth coil are alternately energized, a magnetic force generated in a connection line direction of the second coil and the fourth coil can drive the carrier plate 31 to vibrate reciprocally in a left-right direction. In addition, if the first coil, the second coil, the third coil, and the fourth coil are sequentially energized at a certain frequency, the carrier plate 31 can be rotated in the clockwise direction, and conversely, if the fourth coil, the third coil, the second coil, and the first coil are sequentially energized at a certain frequency, the carrier plate 31 can be rotated in the counterclockwise direction.

The support 21 is substantially cross-shaped, since four coils 23 are arranged at even intervals. In this embodiment, the connection plate 222 is a cross plate, so as to be slidably engaged with the bracket 21. In order to avoid relative rotation between the magnet 223 and the support column 221, the support column 221 adopts a straight quadrangular prism, which is convenient for motion transmission and avoids rotation of the magnet 223 around the support column 221.

Regarding the return assembly 40, in the present embodiment, the elastic member 41 is a tower spring, the bearing plate 31 is disposed above the supporting seat 11, and the diameter of the tower spring gradually increases from one end close to the bearing plate 31 to one end far from the bearing plate 31. Because the tower spring is the variable diameter, its big footpath end can provide stable support, under the fixed circumstances of big footpath end and supporting seat 11, even loading board 31 drives the path end and takes place to shift, under the elasticity effect of tower spring self, the path end can self return, consequently can drive loading board 31 return.

The small diameter end of the tower spring can be connected with the bearing plate 31, the large diameter end of the tower spring is connected with the supporting seat 11, the return assembly 40 further comprises a rocker 42, the rocker 42 penetrates through the tower spring, the large diameter end of the tower spring is fixed with the supporting seat 11, the top end of the rocker 42 is connected with the bearing plate 31, and the rocker 42 can shake along with the small diameter end of the tower spring. When the tower spring is automatically reset, the rocker 42 is reset, so that the bearing plate 31 is reset.

Specifically, the supporting seat 11 is provided with a limiting hole 112 in a penetrating manner, referring to fig. 15 and 16, a bell mouth is arranged at the bottom end of the limiting hole 112, the tower spring is arranged in the limiting hole 112 in a penetrating manner, and the large-diameter end of the tower spring is clamped at the bell mouth. When the bearing plate 31 oscillates, the rocker 42 is driven to oscillate, and after the oscillation is completed, the rocker 42 returns to the vertical state under the action of the tower spring, so that the bearing plate 31 can be driven to return.

More specifically, the return assembly 40 further includes a limiting plate 43, and the limiting plate 43 is connected with the supporting seat 11 and disposed at the flare to abut against the tower spring. The limiting plate 43 plays a limiting role on the tower spring, so that the large-diameter end of the tower spring is fixed with the supporting seat 11, and the limiting plate 43 and the supporting seat 11 can be connected through bolts.

The top end of the rocker 42 and the bearing plate 31 can be inserted, the bottom surface of the bearing plate 31 is provided with an inserting hole, and the top end of the rocker 42 is inserted into the inserting hole. The bottom end of the rocker 42 is provided with a limiting head 421, and the limiting head 421 is arranged on the large-diameter end of the tower spring in a penetrating way and is limited to be separated from the small-diameter end of the tower spring. The outer surface of the limiting head 421 is an arc surface, so that the rocker 42 and the tower spring are contacted smoothly, and the clamping is avoided.

In this embodiment, four tower springs are disposed on four corners of the bearing plate 31, so that the bearing plate 31 is stressed uniformly, and correspondingly, four rocking bars 42 and four limiting plates 43 are disposed.

The reagent oscillation device further comprises a limiting assembly 50, the limiting assembly 50 comprises a supporting portion 51 and an elastic portion 52, the supporting portion 51 is connected with the supporting seat 11, the elastic portion 52 is arranged on the supporting portion 51, an avoidance groove is formed in the bottom of the bearing plate 31, and the elastic portion 52 is inserted into the avoidance groove. In the oscillation process of the bearing plate 31, the avoidance groove moves along with the bearing plate 31, the elastic piece 41 may collide with the groove wall of the avoidance groove, noise can be reduced by adopting the elastic part 52, the stroke of the bearing plate 31 can be limited by setting the limiting assembly 50, and reagent scattering caused by large-scale oscillation is avoided.

In this embodiment, the supporting portion 51 includes a supporting rod 511 and a roller 512, referring to fig. 12 and 13, one end of the supporting rod 511 is connected to the supporting seat 11, the other end of the supporting rod 511 is rotatably provided with the roller 512, and the elastic portion 52 is sleeved on the periphery of the roller 512. The roller 512 is arranged, so that the friction force is smaller when the elastic member 41 contacts with the wall of the avoidance groove, and the impact degree on the bearing plate 31 is reduced. In other embodiments, the supporting portion 51 may be a supporting rod 511, and the elastic portion 52 is sleeved at an end of the supporting rod 511.

Wherein, the support bar 511 may be a pin, and the elastic portion 52 may be an O-ring.

The reagent oscillation device further comprises a positioning column 61, the top surface of the supporting seat 11 is provided with a first limiting groove 113, the bottom surface of the bearing plate 31 is provided with a second limiting groove, one end of the positioning column 61 is inserted into the first limiting groove 113 and can rock in the first limiting groove 113, and the other end of the positioning column 61 is inserted into the second limiting groove. During the oscillation process of the bearing plate 31, the positioning column 61 is driven to shake relative to the first limiting groove 113, and the positioning column 61 can play a role in supporting and positioning. Wherein, in order to be convenient for assembly, the positioning post 61 and the second limit groove can be adhered.

The bottom of the supporting seat 11 is provided with a rubber pad 71 to play a role in vibration damping, noise reduction and friction increase.

The reagent oscillating device can be used alone or matched with gene equipment, can oscillate and mix the reagent uniformly and can return automatically; the oscillating track can realize back-and-forth and left-and-right reciprocating motion, and can also realize clockwise and anticlockwise rotation.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (11)

1. A reagent oscillation device, comprising:

a support base (11);

the magnetic core structure (20) comprises a bracket (21) and a magnetic component (22), wherein the magnetic component (22) is movably connected with the bracket (21), a coil (23) is arranged on the bracket (21), the supporting seat (11) is fixedly connected with the bracket (21) or the magnetic component (22), and the magnetic component (22) can be driven to move by the magnetic field change provided by the coil (23);

a carrier plate (31) connected to a movable one of the rack (21) and the magnetic assembly (22), the carrier plate (31) being for carrying a reagent container;

the return assembly (40) is arranged between the bearing plate (31) and the supporting seat (11), the return assembly (40) comprises a plurality of elastic pieces (41), and the elastic pieces (41) are uniformly arranged at intervals around the circumference of the bearing plate (31).

2. The reagent oscillation device according to claim 1, wherein the carrier plate (31) is disposed above the supporting base (11), and the elastic member (41) is a tower spring, and the diameter of the tower spring increases gradually from an end close to the carrier plate (31) to an end far from the carrier plate (31).

3. The reagent oscillation device according to claim 2, wherein the return assembly (40) further comprises a rocker (42), the rocker (42) is arranged through the tower spring, the large diameter end of the tower spring is fixed with the supporting seat (11), the top end of the rocker (42) is connected with the bearing plate (31), and the rocker (42) can shake along with the small diameter end of the tower spring.

4. A reagent oscillation device according to claim 3, wherein a limiting head (421) is provided at the bottom end of the rocker (42), the limiting head (421) being provided to pass through the large diameter end of the tower spring and being limited to escape from the small diameter end of the tower spring.

5. The reagent oscillation device according to claim 4, wherein the outer surface of the stopper head (421) is an arc-shaped surface.

6. Reagent oscillation device according to claim 1, characterized in that the holder (21) encloses a centrally hollow installation space, in which the magnetic assembly (22) is arranged.

7. The reagent oscillation device according to claim 6, wherein the magnetic component (22) comprises a support column (221), a connection plate (222) sleeved on the support column (221), and a magnet (223) arranged on the connection plate (222), and the connection plate (222) is slidably connected with the bracket (21).

8. The reagent oscillation device according to claim 7, wherein three of the connection plates (222) are provided, three of the connection plates (222) are provided at intervals along the support column (221), and the magnet (223) is provided between adjacent connection plates (222).

9. The reagent oscillation device according to claim 8, wherein the holder (21) is provided with a guide hole (212) communicating with the installation space, and the connecting plate (222) located in the middle is inserted into the guide hole (212) and is slidable along the guide hole (212).

10. The reagent oscillation device according to claim 7, wherein a plurality of coils (23) are provided on the support (21), each coil (23) is disposed around the circumference of the support (21) at intervals, the magnet (223) is a circular ring-shaped magnet, and the magnet (223) is sleeved on the support column (221).

11. Reagent oscillation device according to any one of claims 1-10, wherein the support (11) is fixedly connected to the support (21), the magnetic field variation provided by the coil (23) is capable of driving the magnetic assembly (22) to move, and the carrier plate (31) is connected to the magnetic assembly (22).