Mixing mechanism and fluorescence immunoassay analyzer

Abstract

This invention discloses a mixing mechanism and a fluorescence immunoassay analyzer. The mixing mechanism includes a lifting assembly and a rotating assembly. The lifting assembly includes a mounting base and a lifting drive mounted on the mounting base. The rotating assembly includes a connecting member, a mixing motor, and a rotating head for pressing the mixing container. The connecting member is connected to the output end of the lifting drive, which drives the connecting member to move up and down. The mixing motor is mounted on the connecting member with its output shaft vertically positioned. The rotating head is connected to the output shaft of the mixing motor, which drives the rotating head to rotate the mixing container, thereby mixing the material to be mixed within the container. When the mixing container is transported to the bottom of the mixing mechanism, the lifting drive drives the connecting member to descend until the rotating head presses the mixing container, at which point it stops. The mixing motor then drives the rotating head to rotate the mixing container, thus mixing the material to be mixed within it. This achieves automated mixing, and the space requirement for rotating the mixing tube around a vertical axis for mixing is small.

Description

Technical Field

[0001] This invention relates to the field of medical testing equipment technology, and in particular to a mixing mechanism and a fluorescence immunoassay analyzer. Background Technology

[0002] With the continuous advancement of medical standards, fluorescence immunoassay analyzers have become widely used in large and medium-sized hospitals in recent years, providing essential information for clinical diagnosis, treatment, prevention, and health status assessment. Currently, most mainstream fluorescence immunoassay analyzers use manual mixing or a mechanism to invert and mix the test tubes. However, manual mixing lacks automation, while inverting and mixing requires significant space. Summary of the Invention

[0003] One object of the present invention is to provide a mixing mechanism that features automated mixing and minimal space requirements.

[0004] Another object of the present invention is to provide a fluorescence immunoassay analyzer including the above-described mixing mechanism.

[0005] To achieve this objective, the present invention employs the following technical solution:

[0006] A mixing mechanism includes a lifting assembly and a rotating assembly. The lifting assembly includes a mounting base and a lifting drive, the lifting drive being mounted on the mounting base. The rotating assembly includes a connector, a mixing motor, and a rotating head for pressing a mixing container. The connector is connected to the output end of the lifting drive, and the lifting drive can drive the connector to move up and down. The mixing motor is mounted on the connector with its output shaft vertically arranged. The rotating head is connected to the output shaft of the mixing motor, and the mixing motor can drive the rotating head to rotate the mixing container to mix the material to be mixed in the mixing container.

[0007] In some embodiments, the rotating assembly further includes a guide shaft, a mounting plate, an elastic element, a first detection element, and a first detected element. The guide shaft is vertically and movably inserted into the connector. The mounting plate is connected to the lower end of the guide shaft, the mixing motor is mounted on the mounting plate, and the elastic element is disposed between the mounting plate and the connector. One of the first detection element and the first detected element is connected to the output end of the lifting drive, and the other is connected to the upper end of the guide shaft and located above the connector. The first detection element is communicatively connected to both the mixing motor and the lifting drive.

[0008] In some embodiments, the first detection element is a first optical coupler, the first optical coupler includes a light emitter and a light receiver disposed opposite to each other, and the first detected element is a first baffle that can enter between the light emitter and the light receiver of the first optical coupler.

[0009] In some embodiments, there are two guide shafts, and the mounting plate has a receiving groove on one side facing the connector. The mixing motor is at least partially housed in the receiving groove, and the output shaft of the mixing motor passes through the bottom wall of the receiving groove. The two sides of the receiving groove are respectively connected to the lower ends of the two guide shafts.

[0010] In some embodiments, the lifting assembly further includes a second detection element and a second detection element, one of which is connected to the output end of the lifting drive element, and the other is disposed on the mounting base at a position corresponding to the zero stroke position of the lifting drive element. The second detection element is communicatively connected to the lifting drive element.

[0011] In some embodiments, the second detection element is a second optical coupler, the second optical coupler includes a light emitter and a light receiver, and the second detected element is a second baffle that can enter between the light emitter and the light receiver of the second optical coupler.

[0012] In some embodiments, the lifting drive includes a lifting motor, a lead screw, and a lead screw nut. The lifting motor is mounted on the mounting base. The lead screw is connected to the output shaft of the lifting motor and is vertically arranged. The lifting motor can drive the lead screw to rotate. The lead screw nut is threaded onto the lead screw and can move along the axial direction of the lead screw as the lead screw rotates. The connecting member connects to the lead screw nut.

[0013] In some embodiments, the lifting assembly further includes a lifting slider and a lifting guide rail. The lifting guide rail is mounted on the mounting base and is vertically arranged. The lifting guide rail is slidably connected to the lifting slider. The lead screw passes through the lifting slider, and the lifting slider is fixedly connected to the lead screw nut.

[0014] In some embodiments, the rotating head includes a cylindrical portion and a frustum portion integrally formed with the cylindrical portion, the cylindrical portion being connected to the output shaft of the mixing motor; a pressing groove is provided on the lower end face of the frustum portion, the groove opening diameter of the pressing groove increases sequentially from top to bottom, and the maximum opening diameter of the pressing groove is greater than the outer diameter of the mixing container.

[0015] On the other hand, the present invention adopts the following technical solution:

[0016] A fluorescence immunoassay analyzer includes a frame, an incubation mechanism, a sample injection mechanism, a sample dispensing mechanism, and a mixing mechanism. The frame has a first placement position for placing a sample to be mixed and a second placement position for placing a already mixed sample. The incubation mechanism is mounted on the frame and is used to incubate the sample. The sample injection mechanism is mounted on the frame and is used to transport the sample to be mixed to the first placement position and the already mixed sample to the second placement position. The mixing mechanism is mounted on the frame and is used to mix the sample to be mixed at the first placement position. The sample dispensing mechanism is mounted on the frame and is used to extract the already mixed sample at the second placement position and transport it to the incubation mechanism for incubation.

[0017] The mixing mechanism of the present invention has at least the following beneficial effects: the mixing mechanism has a lifting drive component mounted on a mounting base. The lifting drive component can drive the connecting component of the rotating assembly to drive the mixing motor and the rotating head to rise and fall. The output shaft of the mixing motor is vertically arranged and can drive the rotating head to rotate. Thus, when the mixing container containing the material to be mixed is transported to the bottom of the mixing mechanism, the lifting drive component drives the connecting component to descend. The connecting component stops moving when it descends to the point where the rotating head presses against the mixing container. The mixing motor drives the rotating head to drive the mixing container to rotate in order to mix the material to be mixed in the mixing container. This achieves automated mixing, and the space requirement for rotating the mixing tube around the vertical axis for mixing is small.

[0018] The fluorescence immunoassay analyzer of the present invention has at least the following beneficial effects: by setting the incubation mechanism, sample injection mechanism, sample dispensing mechanism and the above-mentioned mixing mechanism on the same frame, the fluorescence immunoassay analyzer can realize automated sample dispensing, automated mixing, automated sample injection and automated incubation, which helps to improve the efficiency of analysis and detection; and since the mixing mechanism has the characteristic of small space requirement, it helps to reduce the space occupied by the overall structure of the fluorescence immunoassay analyzer. Attached Figure Description

[0019] Figure 1 A schematic diagram of the mixing mechanism provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a rotating head provided for an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of a fluorescence immunoassay analyzer provided for an embodiment of the present invention.

[0022] Explanation of icon numbers:

[0023] 100. Frame; 200. Incubation mechanism; 300. Sample feeding mechanism; 400. Mixing mechanism; 411. Mounting base; 412. Lifting motor; 413. Lead screw; 414. Lead screw nut; 415. Second test piece; 416. Second test piece; 417. Lifting slider; 418. Lifting guide rail; 421. Connecting piece; 422. Mixing motor; 423. Rotating head; 424. Guide shaft; 425. Mounting plate; 426. Elastic element; 427. First test piece; 428. First test piece; 500. Sample feeding mechanism; 4111. Motor mounting plate; 4112. Guide rail mounting plate; 4231. Cylindrical part; 4232. Frustum part; 4233. Pressing groove. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0025] This embodiment provides a mixing mechanism, such as Figures 1-2 As shown, the mixing mechanism 400 includes a lifting assembly and a rotating assembly. The lifting assembly includes a mounting base 411 and a lifting drive component, which is mounted on the mounting base 411. The rotating assembly includes a connector 421, a mixing motor 422, and a rotating head 423 for pressing a mixing container (e.g., a test tube). The connector 421 is connected to the output end of the lifting drive component, which can drive the connector 421 to move up and down. The mixing motor 422 is mounted on the connector 421 and its output shaft is vertically arranged. The rotating head 423 is connected to the output shaft of the mixing motor 422, which can drive the rotating head 423 to rotate the mixing container to mix the material to be mixed in the mixing container.

[0026] The aforementioned mixing mechanism 400 has a lifting drive component mounted on a mounting base 411. The lifting drive component is configured to drive the connecting member 421 of the rotating assembly to lift the mixing motor 422 and the rotating head 423. The output shaft of the mixing motor 422 is vertically positioned and configured to drive the rotating head 423 to rotate. Thus, when the mixing container containing the material to be mixed is transported to the bottom of the mixing mechanism 400, the lifting drive component drives the connecting member 421 to descend. The connecting member 421 stops moving when it descends to the point where the rotating head 423 presses against the mixing container. The mixing motor 422 drives the rotating head 423 to rotate the mixing container to mix the material to be mixed in the mixing container. This achieves automated mixing and requires minimal space by rotating the mixing tube around a vertical axis for mixing.

[0027] In this embodiment, the lifting drive includes a lifting motor 412, a lead screw 413, and a lead screw nut 414. The lifting motor 412 is mounted on a mounting base 411. The lead screw 413 is connected to the output shaft of the lifting motor 412 and is vertically arranged, allowing the lifting motor 412 to drive the lead screw 413 to rotate. The lead screw nut 414 is threaded onto the lead screw 413 and can move axially along the lead screw 413 as it rotates. A connecting piece 421 connects to the lead screw nut 414. The lifting motor 412, lead screw 413, and lead screw nut 414 are all common devices, readily available, and offer high movement accuracy and are not easily worn. The bidirectional rotation of the lifting motor 412 can drive the lead screw nut 414 to rise and fall, thereby driving the connecting piece 421 connected to the lead screw nut 414 and the mixing motor 422 and rotating head 423 mounted on the connecting piece 421 to rise and fall. Of course, in other embodiments, a linear motor, cylinder, hydraulic cylinder, or electric push rod can also be used as the lifting drive; this invention does not limit this.

[0028] Based on the structure of the aforementioned lifting drive component, the lifting assembly also includes a lifting slider 417 and a lifting guide rail 418. The lifting guide rail 418 is mounted on the mounting base 411 and is vertically arranged. The lifting guide rail 418 is slidably connected to the lifting slider 417. A lead screw 413 passes through the lifting slider 417, and the lifting slider 417 is fixedly connected to a lead screw nut 414. Specifically, the lead screw nut 414 is connected to the connecting member 421 of the rotating assembly through the lifting slider 417. The bidirectional rotation of the lifting motor 412 can drive the lifting slider 417 to rise and fall through the lead screw nut 414, thereby driving the connecting member 421 to rise and fall, ensuring that the rotating assembly can rise and fall together with the slider. The movement of the lifting slider 417 along the lifting guide rail 418 ensures that the lifting slider 417 only moves in the vertical direction, ensuring motion accuracy and stability during movement.

[0029] Specifically, in this embodiment, the mounting base 411 includes a motor mounting plate 4111 and a guide rail mounting plate 4112. The guide rail mounting plate 4112 is vertically arranged, and the motor mounting plate 4111 is horizontally arranged and fixedly connected to the guide rail mounting plate 4112. The lifting motor 412 is mounted on the motor mounting plate 4111, and the lifting guide rail 418 is mounted on the guide rail mounting plate 4112.

[0030] Optionally, the number of lifting sliders 417 can be set to one, two, or more. Setting multiple lifting sliders 417 can further improve motion stability and increase the connection strength between the lifting component and the rotating component. Figure 1 As shown, in this embodiment, a lifting slider 417 is provided, and a groove is provided on the lifting slider 417. The connecting piece 421 extends into the groove and is fixedly connected to the two side walls of the groove. The groove can reduce the space occupied by the connecting piece 421 and make the overall structure more compact.

[0031] In some embodiments, the lifting assembly further includes a second detection element 415 and a second detected element 416. One of the second detection element 415 and the second detected element 416 is connected to the output end of the lifting drive, and the other is disposed on the mounting base 411 corresponding to the zero position of the lifting drive. The second detection element 415 is communicatively connected to the lifting drive. When the second detection element 415 detects the second detected element 416, it will trigger the lifting drive to stop driving the connecting member 421 of the rotating assembly to rise and fall. It can be understood that the second detection element 415 and the second detected element 416 constitute a lifting zero position detection assembly, providing a motion origin for the rising and falling of the rotating assembly and preventing impact caused by excessive movement of the rotating assembly when it rises.

[0032] In this embodiment, the second detection element 415 is mounted on the guide rail mounting plate 4112 of the mounting base 411, corresponding to the zero position of the lifting drive component's stroke. The second detection element 416 is connected to the output end of the lifting drive component, and the second detection element 416 can move up and down with the output end of the lifting drive component. Of course, in other embodiments, the second detection element 415 can also be connected to the output end of the lifting drive component, and the second detection element 416 can be set on the mounting base 411 at the position corresponding to the zero position of the lifting drive component's stroke.

[0033] In this embodiment, the second detection element 415 is a second optocoupler, which includes a emitter and a receiver. The second detected element 416 is a second baffle, which can enter between the emitter and receiver of the second optocoupler. Specifically, the second baffle is fixedly disposed on one side of the lifting slider 417. The second baffle moves up and down with the lifting slider 417. When the lifting slider 417 rises to the point where the second baffle blocks between the emitter and receiver of the second optocoupler, the second optocoupler triggers the lifting drive to stop driving the lifting slider 417 to move. Of course, in other embodiments, an infrared through-beam sensor or other sensors can also be used as the second detection element 415, and the present invention does not limit this.

[0034] In some embodiments, the rotating assembly further includes a guide shaft 424, a mounting plate 425, an elastic element 426, a first detection element 427, and a first detected element 428. The guide shaft 424 is vertically and vertically inserted into the connector 421. The mounting plate 425 is connected to the lower end of the guide shaft 424. The mixing motor 422 is mounted on the mounting plate 425. The elastic element 426 is disposed between the mounting plate 425 and the connector 421. One of the first detection element 427 and the first detected element 428 is connected to the output end of the lifting drive, and the other is connected to the upper end of the guide shaft 424 and located above the connector 421. The first detection element 427 is communicatively connected to both the mixing motor 422 and the lifting drive.

[0035] Because an elastic element 426 is provided between the mounting plate 425 and the connector 421, when the rotating head 423 contacts the mixing container and continues to descend, the elastic element 426 will be compressed. The elasticity of the elastic element 426 allows the rotating head 423 to float and press against the mixing container, thus adapting to mixing containers of different heights and effectively controlling the downward pressure. It should be noted that when installing the elastic element 426, it should be ensured that the first detected component 428 will not be detected by the first detection element 427 when the elastic element 426 is in a free state. The first detection element 427 and the first detected component 428 form a mixing position detection component, which can detect whether the rotating head 423 has descended to the correct position. When the rotating head 423 descends to the point where the elastic element 426 is compressed, the guide shaft 424 floats up. When the guide shaft 424 floats up to the point where the first detection element 427 detects the first detected component 428, the first detection element 427 will trigger the lifting drive to stop driving the connector 421 to descend, thus adapting to mixing containers of different heights.

[0036] Optionally, the mixing motor 422 can be a brushless DC motor or other types of motors, as long as it can drive the rotating head 423 to rotate. A brushless DC motor is preferred because it is small in size, lightweight, has strong overload capacity, good braking characteristics, and is easy to maintain and repair. In this embodiment, the elastic element 426 is a spring, which is sleeved on the guide shaft 424. In other embodiments, the elastic element 426 can also be a sponge pad or a spring sheet.

[0037] In this embodiment, the first detection element 427 is connected to the output end of the lifting drive element, and the first detection element 428 is connected to the upper end of the guide shaft 424 and located above the connector 421. The first detection element 428, the mixing motor 422, the mounting plate 425, and the guide shaft 424 are connected together to form a motor assembly, which can move up and down relative to the connector 421. Of course, in other embodiments, the first detection element 428 can also be connected to the output end of the lifting drive element, and the first detection element 427 can be connected to the upper end of the guide shaft 424 and located above the connector 421.

[0038] In this embodiment, the first detection element 427 is a first optical coupler, which includes a light emitter and a light receiver disposed opposite to each other. The first detected element 428 is a first baffle, which can enter between the light emitter and the light receiver of the first optical coupler. When installing the elastic element 426, it should be ensured that when the elastic element 426 is in a free state, the first baffle does not block the light emitter and the light receiver of the first optical coupler. Of course, in other embodiments, an infrared through-beam sensor or other sensors can also be used as the first detection element 427, and the present invention does not limit this.

[0039] In some embodiments, two guide shafts 424 are provided. A receiving groove is provided on the side of the mounting plate 425 facing the connector 421. The mixing motor 422 is at least partially housed in the receiving groove, and the output shaft of the mixing motor 422 passes through the bottom wall of the receiving groove. The lower ends of the two guide shafts 424 are respectively connected to both sides of the receiving groove. By providing two guide shafts 424, the motor assembly is more stable when moving up and down. The receiving groove prevents the mixing motor 422 from occupying the space under the mounting plate 425, facilitating the layout of the device and the placement of the rotating head 423. Specifically, a through hole is provided on the connector 421 for the mixing motor 422 to pass through, to avoid interference between the mixing motor 422 and the connector 421 when moving up and down.

[0040] like Figure 2 As shown, in some embodiments, the rotating head 423 includes a cylindrical portion 4231 and a frustum portion 4232 integrally formed with the cylindrical portion 4231. The cylindrical portion 4231 is connected to the output shaft of the mixing motor 422. A pressing groove 4233 is formed on the lower end face of the frustum portion 4232. The diameter of the opening of the pressing groove 4233 increases sequentially from top to bottom, and the maximum diameter of the opening of the pressing groove 4233 is larger than the outer diameter of the mixing container. The function of the pressing groove 4233 is to correct the mixing container when it is not placed correctly. Optionally, the rotating head 423 can be made of plastic to ensure that it can provide sufficient friction when in contact with the mixing container; or a silicone pad can be provided on the groove wall of the pressing groove 4233, which can also provide sufficient friction when in contact with the mixing container.

[0041] See Figure 1 , Figure 1 The lifting assembly of the mixing mechanism 400 shown includes a mounting base 411, a lifting drive component, a lifting slider 417, a lifting guide rail 418, a second detection component 415, and a second detection component 416. The lifting drive component includes a lifting motor 412, a lead screw 413, and a lead screw nut 414. The rotating assembly includes a connector 421, a mixing motor 422, a rotating head 423, a guide shaft 424, a mounting plate 425, an elastic component 426, a first detection component 427, and a first detection component 428. The specific connection relationships between the components can be referred to the foregoing content and will not be repeated here. Figure 1 The working principle of the mixing mechanism 400 shown is as follows:

[0042] During normal operation, the lifting assembly is at the zero position (at which time the second detection element 415 can detect the second detected element 416). When the mixing mechanism 400 receives a mixing command, the lifting motor 412 starts working, driving the lead screw 413 to rotate so that the lead screw nut 414 moves downward, thereby causing the lifting slider 417 to descend along the lifting guide rail 418, driving the rotating assembly to descend. When the rotating head 423 of the rotating assembly contacts the mixing container, the lifting motor 412 continues to work, and the rotating head 423 is subjected to force, causing the motor assembly composed of the mixing motor 422, the mounting plate 425, and the guide shaft 424 to move upward as a whole and compress the elastic element 426 until the first detection element 427 detects the first detected element 428. The first detection element 427 sends a signal to the control system, and the control system controls the lifting motor 412 to stop working and sends a signal to the mixing motor 422. The mixing motor 422 drives the rotating head 423 to rotate, and the rotating head 423 drives the mixing container to rotate at high speed, so that the material to be mixed in the mixing container achieves the mixing effect. After mixing is completed, the lifting motor 412 receives a command from the control system to start driving the lead screw 413 to rotate so that the lead screw nut 414 moves upward, thereby lifting the slider 417 along the lifting guide rail 418 and driving the rotating assembly to rise. During the rising process, the motor assembly moves downward under the elastic restoring force of the compressed elastic element 426 until the first detection element 427 can no longer detect the first detected element 428. At this time, the lifting motor 412 continues to work until the second detection element 415 detects the second detected element 416, completing one mixing action.

[0043] This embodiment also provides a fluorescence immunoassay analyzer, such as... Figure 3 As shown, the fluorescence immunoassay analyzer includes a frame 100, an incubation mechanism 200, a sample injection mechanism 300, a sample dispensing mechanism 500, and the aforementioned mixing mechanism 400. The frame 100 has a first placement position for placing a sample to be mixed and a second placement position for placing a mixed sample. The incubation mechanism 200 is mounted on the frame 100 for incubating the sample. The sample injection mechanism 300 is mounted on the frame 100 for transporting the sample to be mixed to the first placement position and the mixed sample to the second placement position. The mixing mechanism 400 is mounted on the frame 100 for mixing the sample to be mixed located at the first placement position. The sample dispensing mechanism 500 is mounted on the frame 100 for extracting the mixed sample located at the second placement position and transporting it to the incubation mechanism 200 for incubation.

[0044] The rack 100 provides mounting and support for various mechanisms, and the sample introduction assembly allows users to exchange samples with the fluorescence immunoassay analyzer. Furthermore, the fluorescence immunoassay analyzer also includes a housing and a touchscreen display for human-computer interaction. The housing is mounted on the rack 100 for protection. For ease of demonstration, Figure 3 The casing and touch screen are hidden inside.

[0045] Figure 3 The working principle of the fluorescence immunoassay analyzer shown is as follows: After the user selects the test item on the human-machine interface, the user inserts the reagent card into the incubation mechanism 200. At this time, the sample injection mechanism 300 extends out of the machine. The user puts multiple samples to be tested into the sample injection mechanism 300. The sample injection mechanism 300 transports one of the samples to the first placement position below the rotating head 423 of the mixing mechanism 400. After the mixing mechanism 400 completes the mixing action, the sample injection mechanism 300 transports the mixed sample to the second placement position below the sample addition mechanism 500. The sample addition mechanism 500 extracts the mixed sample and transports it to the reagent card in the incubation mechanism 200 for incubation. After incubation, the sample is tested.

[0046] The fluorescence immunoassay analyzer provided in this embodiment, by setting an incubation mechanism 200, a sample injection mechanism 300, a sample addition mechanism 500, and the aforementioned mixing mechanism 400 on the same frame 100, can realize automated sample addition, automated mixing, automated sample injection, and automated incubation, which helps to improve the efficiency of analysis and detection; and since the mixing mechanism 400 has the characteristic of small space requirement, it helps to reduce the space occupied by the overall structure of the fluorescence immunoassay analyzer.

[0047] It should be noted that when a part is said to be "fixed to" another part, it can be directly on the other part or have an intermediate part. When a part is said to be "connected to" another part, it can be directly connected to the other part or may have an intermediate part. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A mixing mechanism, characterized in that, include: A lifting assembly, the lifting assembly including a mounting base (411) and a lifting drive component, the lifting drive component being mounted on the mounting base (411); as well as A rotating assembly includes a connector (421), a mixing motor (422), and a rotating head (423) for pressing a mixing container. The connector (421) is connected to the output end of the lifting drive, which can drive the connector (421) to move up and down. The mixing motor (422) is mounted on the connector (421) and its output shaft is vertically arranged. The rotating head (423) is connected to the output shaft of the mixing motor (422), which can drive the rotating head (423) to rotate the mixing container to mix the material to be mixed in the mixing container. The rotating assembly also includes: A guide shaft (424) is vertically and flexibly inserted into the connector (421); Mounting plate (425), which is connected to the lower end of the guide shaft (424), and the mixing motor (422) is mounted on the mounting plate (425); An elastic element (426) is disposed between the mounting plate (425) and the connector (421); The first detection element (427) and the first detection element (428) are connected, one of which is connected to the output end of the lifting drive, and the other is connected to the upper end of the guide shaft (424) and located above the connector (421). The first detection element (427) is communicatively connected to the mixing motor (422) and the lifting drive respectively. The lifting assembly further includes a second detection element (415) and a second detection element (416). One of the second detection element (415) and the second detection element (416) is connected to the output end of the lifting drive, and the other is set on the mounting base (411) at a position corresponding to the zero stroke of the lifting drive. The second detection element (415) is communicatively connected to the lifting drive. The first tested component (428), the mixing motor (422), the mounting plate (425), and the guide shaft (424) are connected together to form a motor assembly, which can move up and down relative to the connector (421).

2. The mixing mechanism according to claim 1, characterized in that, The first detection element (427) is a first optical coupler, which includes a light emitter and a light receiver arranged opposite to each other. The first detection element (428) is a first baffle, which can enter between the light emitter and the light receiver of the first optical coupler.

3. The mixing mechanism according to claim 1, characterized in that, Two guide shafts (424) are provided. The mounting plate (425) has a receiving groove on the side facing the connector (421). The mixing motor (422) is at least partially housed in the receiving groove and the output shaft of the mixing motor (422) passes through the bottom wall of the receiving groove. The two sides of the receiving groove are respectively connected to the lower ends of the two guide shafts (424).

4. The mixing mechanism according to claim 1, characterized in that, The second detection element (415) is a second optical coupler, which includes a light emitter and a light receiver. The second detection element (416) is a second baffle, which can enter between the light emitter and the light receiver of the second optical coupler.

5. The mixing mechanism according to claim 1, characterized in that, The lifting drive component includes a lifting motor (412), a lead screw (413), and a lead screw nut (414). The lifting motor (412) is mounted on the mounting base (411). The lead screw (413) is connected to the output shaft of the lifting motor (412) and is vertically arranged. The lifting motor (412) can drive the lead screw (413) to rotate. The lead screw nut (414) is threadedly connected to the lead screw (413) and can move along the axial direction of the lead screw (413) as the lead screw (413) rotates. The connecting piece (421) connects to the lead screw nut (414).

6. The mixing mechanism according to claim 5, characterized in that, The lifting assembly also includes a lifting slider (417) and a lifting guide rail (418). The lifting guide rail (418) is mounted on the mounting base (411) and is vertically arranged. The lifting guide rail (418) is slidably connected to the lifting slider (417). The lead screw (413) passes through the lifting slider (417). The lifting slider (417) is fixedly connected to the lead screw nut (414).

7. The mixing mechanism according to any one of claims 1 to 6, characterized in that, The rotating head (423) includes a cylindrical part (4231) and a frustum part (4232) integrally formed with the cylindrical part (4231). The cylindrical part (4231) is connected to the output shaft of the mixing motor (422). A pressing groove (4233) is provided on the lower end face of the frustum part (4232). The opening diameter of the pressing groove (4233) increases sequentially from top to bottom, and the maximum opening diameter of the pressing groove (4233) is greater than the outer diameter of the mixing container.

8. A fluorescence immunoassay analyzer, characterized in that, include: A frame (100) is provided with a first placement position for placing a sample to be mixed and a second placement position for placing a sample that has been mixed. An incubation apparatus (200) is mounted on the rack (100) for incubating samples; A sample introduction mechanism (300) is mounted on the frame (100) for transporting the sample to be mixed to the first placement position and transporting the mixed sample to the second placement position; The mixing mechanism (400) as described in any one of claims 1 to 7, the mixing mechanism (400) being mounted on the frame (100) for mixing the sample to be mixed located at the first placement position; and A sample loading mechanism (500) is mounted on the frame (100) for extracting and transporting the mixed sample located in the second placement position to the incubation mechanism (200) for incubation.

Images