Stir bar and sample analyzer

Abstract

A kind of stirring rod and sample analyzer, wherein, stirring rod includes stirring part and fixed part, stirring part includes spiral section, spiral section is used to at least partially immerse in the reaction liquid in reaction container, to stir the reaction liquid in reaction container when rotating.The fixed part is connected with stirring part, and fixed part is used to be connected with the driving mechanism of driving stirring rod rotation, wherein, stirring part is not integrally formed with fixed part.By setting stirring rod includes spiral section for stirring reaction liquid, it is advantageous to improve the mixing efficiency and mixing effect of reaction liquid;By setting stirring part is not integrally formed with fixed part, the processing difficulty of stirring rod can be reduced, it is advantageous to control the consistency of stirring rod structure size, avoid the situation that detection result is influenced by the poor consistency of stirring rod size, and when stirring part is scrapped, the whole stirring rod is not scrapped, and processing cost and material cost can be reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a stirring rod and a sample analyzer. Background Technology

[0002] In the process of sample analysis, thorough mixing of samples and reagents is crucial, directly affecting the accuracy and efficiency of the test results. To ensure thorough mixing of samples and reagents, existing sample analyzers are equipped with a stirring mechanism. This mechanism agitates the reaction solution formed by the mixture of samples and reagents within the reaction vessel, ensuring complete mixing.

[0003] In the prior art, the stirring rod of the stirring mechanism is complex to manufacture and it is difficult to ensure the consistency of the structural dimensions, resulting in high processing costs and poor mixing effect. Utility Model Content

[0004] In view of this, the present invention proposes a stirring rod and a sample analyzer.

[0005] The stirring rod proposed in the first aspect of this utility model includes:

[0006] The stirring section includes a spiral section for at least partially immersing itself in the reaction liquid within the reaction vessel to stir the reaction liquid within the reaction vessel during rotation;

[0007] A fixing part is connected to the stirring part, and the fixing part is used to connect to the driving mechanism that drives the stirring rod to rotate;

[0008] The stirring part and the fixing part are not integrally formed.

[0009] As can be seen from the above technical solution, the stirring rod proposed in the first aspect of this utility model, firstly, by setting the stirring part to include a spiral section for stirring the reaction liquid, the spiral section can simultaneously generate bidirectional flow in both the axial and radial directions during the rotation and stirring of the reaction liquid, realizing three-dimensional turbulence, promoting mutual diffusion between different liquid phases, and thus improving the mixing efficiency and mixing effect of the reaction liquid. Secondly, by setting the stirring part and the fixing part to be not integrally formed, that is, the stirring part and the fixing part are processed independently, the processing difficulty of the stirring rod can be reduced. Since the processing difficulty is reduced, it is beneficial to control the consistency of the structural dimensions of the stirring rod, avoiding the situation where poor consistency of the stirring rod dimensions affects the test results. In addition, by setting the stirring part and the fixing part to be not integrally formed, when the stirring part is scrapped, the entire stirring rod will not be scrapped, which can reduce processing costs and material costs.

[0010] The sample analyzer according to the second aspect of this utility model includes a sample dispensing mechanism, a reagent dispensing mechanism, a stirring mechanism, an incubation mechanism, and a detection mechanism. The sample dispensing mechanism is used to draw a sample from a sample container and dispense the drawn sample into a reaction container. The reagent dispensing mechanism is used to draw a reagent from a reagent container and dispense the drawn reagent into the reaction container to mix with the sample to form a reaction solution. The stirring mechanism includes a driving mechanism and a stirring rod. The driving mechanism is used to drive the stirring rod to rotate to stir and mix the reaction solution in the reaction container. The incubation mechanism is used to incubate the stirred and mixed reaction solution. The detection device is used to perform optical measurements on the incubated reaction solution. The stirring rod includes:

[0011] The stirring section includes a spiral section for at least partially immersing itself in the reaction liquid within the reaction vessel to stir the reaction liquid within the reaction vessel during rotation;

[0012] A fixing part is connected to the stirring part, and the fixing part is used to connect to the driving mechanism;

[0013] The stirring part and the fixing part are not integrally formed.

[0014] As can be seen from the above technical solutions, the sample analyzer proposed in the second aspect of this utility model, by setting the stirring rod of the stirring mechanism to include a spiral section for stirring the reaction liquid, can simultaneously generate bidirectional flow in both the axial and radial directions during the rotation and stirring of the reaction liquid, realizing three-dimensional turbulence, promoting mutual diffusion between different liquid phases, and thus improving the mixing efficiency and mixing effect of the reaction liquid. Secondly, by setting the stirring part and the fixed part to be not integrally formed, that is, the stirring part and the fixed part are processed independently, the processing difficulty of the stirring rod can be reduced. Since the processing difficulty is reduced, it is easier to control the consistency of the structural dimensions of the stirring rod, avoiding the situation where poor consistency of the stirring rod dimensions affects the test results. In addition, by setting the stirring part and the fixed part to be not integrally formed, when the stirring part is scrapped, the entire stirring rod will not be scrapped, which can reduce processing costs and material costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the cooperation between the stirring rod and the driving mechanism according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the stirring rod proposed in one embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the stirring section according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the fixing part according to an embodiment of the present invention;

[0020] Figure 5 This is a partial structural schematic diagram of the stirring rod proposed in one embodiment of the present invention;

[0021] Figure 6 This is a partial structural schematic diagram of the stirring rod proposed in another embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of a sample analyzer proposed in one embodiment of the present invention. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0024] In the process of sample analysis, thorough mixing of samples and reagents is crucial, directly affecting the accuracy and efficiency of the analytical results. To ensure thorough mixing, existing sample analyzers are equipped with a stirring mechanism. This mechanism agitates the reaction solution formed by the sample and reagents within the reaction vessel, ensuring complete mixing.

[0025] Common stirring mechanisms include contact mechanical stirring and non-contact ultrasonic stirring. Contact mechanical stirring uses a drive mechanism to insert a stirring rod into the reaction vessel to stir the reaction liquid. Specifically, the stirring rod of a contact mechanical stirrer includes a stirring part and a fixing part. The stirring part is used to insert into the reaction vessel to stir the reaction liquid, and the fixing part is used to connect to the drive mechanism. The drive mechanism drives the fixing part to rotate, thereby causing the stirring part to rotate and stirring the reaction liquid in the reaction vessel.

[0026] Depending on the required capacity, the stirring section of the stirring rod used to stir the reaction liquid is generally designed as a straight, plate-like structure or a spiral structure. For the spiral structure, there are generally two processing methods. One method involves first cutting the end of the metal rod that forms the stirring section into a metal sheet, and then twisting it into a spiral shape. The disadvantage of this method is that it is difficult to control the uniformity of the thickness of the metal sheet cut from the end of the metal rod, leading to large differences in spiral deformation during the subsequent twisting process. This results in large dimensional deviations in the spiral structure of each stirring rod, making it difficult to ensure dimensional consistency. The other processing method involves directly machining the end of the metal rod that forms the stirring section into a spiral shape. Because the spiral structure is relatively complex, it is difficult to process, and similarly, it is difficult to ensure dimensional consistency.

[0027] It should be noted that in some sample analysis scenarios, the same sample may need to be tested two or three times. To save testing time and improve efficiency, some sample analyzers are equipped with multiple stirring rods. While one stirring rod is being cleaned, another stirring rod can be used for stirring, allowing for uninterrupted analysis of multiple samples. However, when different stirring rods are used for multiple tests of the same sample, and the stirring rods have poor dimensional consistency, the stirring rod itself can become a factor affecting the test results, leading to inaccurate results.

[0028] In addition, if the spiral part fails to be machined, the entire stirring rod will be scrapped, resulting in high processing costs.

[0029] To address the aforementioned problems, this invention proposes a stirring rod and a sample analyzer using the stirring rod.

[0030] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a stirring rod 10 for a sample analyzer. The stirring rod 10 includes a stirring section 11 and a fixing section 12. The stirring section 11 includes a spiral section 111, which is at least partially immersed in the reaction liquid 300 within the reaction vessel 200 to stir the reaction liquid 300 within the reaction vessel 200 during rotation. The fixing section 12 is connected to the stirring section 11 and is used to connect to a drive mechanism 41 that drives the stirring rod 10 to rotate. The stirring section 11 and the fixing section 12 are not integrally formed.

[0031] The phrase "the stirring part 11 and the fixing part 12 are not integrally formed" means that during the manufacturing process of the stirring rod 10, the stirring part 11 and the fixing part 12 are independently processed and formed, and then assembled together by mechanical coupling. The mechanical coupling method can be, but is not limited to, welding, bonding, laser cladding, bolt fastening or snap-fit ​​connection.

[0032] The stirring rod 10 proposed in this embodiment firstly features a stirring section 11 including a spiral segment 111 for stirring the reaction liquid 300. During the rotation and stirring of the reaction liquid 300, the spiral segment 111 generates bidirectional flow in both the axial and radial directions, achieving three-dimensional turbulence and promoting mutual diffusion between different liquid phases, thus improving the mixing efficiency and effect of the reaction liquid 300. Secondly, by designing the stirring section 11 and the fixing section 12 as non-integral molding, i.e., the stirring section 11 and the fixing section 12 are processed independently, the processing difficulty of the stirring rod 10 can be reduced. This reduced processing difficulty facilitates control over the consistency of the structural dimensions of the stirring rod 10, avoiding situations where dimensional inconsistencies between different stirring rods affect the test results. Furthermore, by designing the stirring section 11 and the fixing section 12 as non-integral molding, when the stirring section 11 is scrapped, the entire stirring rod 10 is not necessarily scrapped, thus reducing processing and material costs.

[0033] In some embodiments, the stirring section 11 is formed by twisting a long, straight sheet. The "twisting process" refers to the process where, during the forming of the stirring section 11, a first clamp holds one end of the long, straight sheet, and a second clamp holds the remaining parts. Then, the first and second clamps rotate in opposite directions, causing the portion of the long, straight sheet located between the first and second clamps to twist and form a spiral segment 111. In this embodiment, compared to machining the spiral segment 111 from a blank, the twisting process is simpler and reduces processing costs. Furthermore, compared to cutting a sheet from one end of a metal rod, the stirring section 11 in this embodiment directly uses a pre-formed long, straight sheet. The uniformity of the sheet's thickness is controllable, resulting in more uniform stress on the sheet during the twisting process of forming the spiral segment 111. This leads to smaller dimensional differences in the formed spiral segment 111, resulting in high dimensional consistency of the stirring rod 10.

[0034] like Figure 2As shown, in some embodiments, the fixing part 12 is columnar, and the stirring part 11 is connected to one end of the fixing part 12 and coaxially arranged with the fixing part 12. Coaxial arrangement of the stirring part 11 and the fixing part 12 means that the center line of the stirring part 11 and the center line of the fixing part 12 are on a straight line. It should be noted that the coaxial arrangement of the stirring part 11 and the fixing part 12 has the following advantages: First, the stirring part 11 can rotate stably in the reaction vessel, and the generated liquid flow is symmetrical and controllable, allowing the sample and reagents to be mixed quickly, thoroughly, and uniformly, preventing local concentrations from being too high or too low. Second, the stirring conditions are almost identical each time, eliminating fluctuations in detection results caused by uneven mixing, and improving the comparability and reliability of detection results between different batches, different samples, and multiple tests of the same sample. Third, the eccentrically rotating stirring rod 10 violently and irregularly shears the liquid, easily drawing air into the liquid and generating a large number of bubbles and foam. These bubbles can severely interfere with the measurement results of optical detection systems (such as colorimetry and optical detection), leading to abnormal absorbance values ​​and thus producing erroneous or unreliable detection data. In this embodiment, the coaxial arrangement of the stirring part 11 and the fixing part 12 greatly reduces this risk. Fourth, the eccentrically oscillating stirring rod 10 can slap the reaction liquid 300 in the reaction container 200, splashing droplets outside the reaction container 200 and even onto nearby reaction containers 200 or instrument components, causing cross-contamination. In this embodiment, the coaxial arrangement of the stirring part 11 and the fixing part 12 effectively controls the movement of the liquid within the reaction container 200, greatly reducing the possibility of droplet splashing and thus reducing the risk of cross-contamination between samples. Fifth, the coaxial arrangement of the stirring part 11 and the fixing part 12 can reduce operating noise and vibration.

[0035] like Figure 3 As shown, in some embodiments, the stirring section 11 further includes a long straight section 112, one end of which is connected to the spiral section 111, and the other end of which is connected to the fixing section 12. In this embodiment, compared to the case where the stirring section 11 only includes the spiral section 111, providing the long straight section 112 reduces the difficulty of connecting the stirring section 11 and the fixing section 12. Furthermore, for stirring sections of the same length, the stirring section with the long straight section 112 is easier to clean than the stirring section without the long straight section 112.

[0036] Optionally, the long straight section 112 and the spiral section 111 are integrally formed. Specifically, during the process of twisting and forming the spiral section 111, the first clamp clamps one end of the long straight sheet, and the second clamp can clamp other positions of the long straight sheet. The first clamp and the second clamp rotate in opposite directions, so that the part of the long straight sheet located between the first clamp and the second clamp is twisted to form the spiral section 111, and the part of the long straight sheet located between the second clamp and the end away from the first clamp is not subjected to torsion and retains its original shape to form the long straight section 112.

[0037] It should be noted that the long straight section 112 and the spiral section 111 can also be formed by separate processing and then fixed together by welding or laser cladding, depending on the actual design requirements.

[0038] It should also be noted that the stirring part 11 may not have a long straight section 112, which is beneficial to improving the coaxiality between the stirring part 11 and the fixing part 12.

[0039] like Figure 2 and Figure 4 As shown, in some embodiments, a slot 121 is provided at the end where the fixing part 12 connects to the long straight section 112, and at least part of the long straight section 112 is embedded in the slot 121. With this embodiment, the connection difficulty between the stirring part 11 and the fixing part 12 can be reduced. Specifically, during the assembly of the stirring part 11 and the fixing part 12, at least part of the long straight section 112 is embedded in the slot 121 of the fixing part 12, and then a fixed connection is formed between the long straight section 112 and the fixing part 12 by welding, bonding, laser cladding, or other methods.

[0040] like Figure 4 As shown, in some embodiments, the end of the fixing part 12 connected to the long straight section 112 includes two clamping parts 122. The two clamping parts 122 are spaced apart along the radial direction of the fixing part 12, and the gap between the two clamping parts 122 forms a slot 121. The long straight section 112 is at least partially embedded between the two clamping parts 122.

[0041] In some embodiments, the long straight section 112 and the fixing part 12 are fixedly connected by welding, and the welding between the long straight section 112 and the fixing part 12 is a full-circumference welding. Full-circumference welding means that all contact points between the long straight section 112 and the fixing part 12 are welded. With this embodiment, the connection between the long straight section 112 and the fixing part 12 can be relatively smooth, and when a hydrophobic coating is applied to the stirring rod 10 subsequently, the hydrophobic coating can adhere better to the stirring rod 10 and is less prone to peeling.

[0042] In some embodiments, the entire long straight section 112 is embedded in the slot 121. In this embodiment, the stirring part 11 is less likely to deform during manufacturing and subsequent use, thereby maintaining the coaxiality between the stirring part 11 and the fixing part 12. The advantages of the coaxial arrangement between the stirring part 11 and the fixing part 12 can be referred to above, and will not be repeated here.

[0043] In some embodiments, the cross-sectional profile of the end where the fixing part 12 connects to the long straight section 112 is circular. A circular structure is simple and easy to process. It should be noted that the cross-sectional profile of the end where the fixing part 12 connects to the long straight section 112 is not limited to being circular. For example, in some other embodiments, the cross-sectional profile of the end where the fixing part 12 connects to the long straight section 112 can also be set to other shapes such as polygons. The specific shape can be determined according to the actual design needs, as long as the slot 121 passes through the center line of the fixing part 12, so that the coaxiality of the stirring part 11 and the fixing part 12 is high after assembly.

[0044] It should be noted that the end of the fixing part 12 connected to the long straight section 112 is not limited to having a slot 121. For example, in some other embodiments, such as Figure 6 As shown, the end of the fixing part 12 connected to the long straight section 112 can also be provided with a mating surface E. When the long straight section 112 is connected to the fixing part 12, the long straight section 112 fits against the mating surface E, and then a fixed connection can be formed by welding, bonding, laser cladding or other methods.

[0045] In some embodiments, in order to improve the coaxiality of the stirring part 11 and the fixing part 12, before welding the long straight part and the fixing part 12, a coaxiality adjustment tool can be used to accurately adjust the center line of the stirring part 11 and the center line of the fixing part 12 to the same straight line, and then the welding process is performed to further ensure the coaxiality of the stirring part 11 and the fixing part 12.

[0046] like Figure 5 As shown, in some embodiments, the long straight section 112 includes a first connecting section 1121 and a second connecting section 1122. The first connecting section 1121 is connected to the fixing part 12, and the second connecting section 1122 is connected between the spiral section 111 and the first connecting section 1121. As described above, the end of the fixing part 12 connected to the long straight section 112 may or may not have a slot 121. When the end of the fixing part 12 connected to the long straight section 112 has a slot 121, the first connecting section 1121 is embedded in the slot 121, and the second connecting section 1122 is exposed outside the slot 121.

[0047] In some embodiments, the length of the spiral segment 111 is greater than or equal to the liquid level of the reaction liquid 300 within the reaction vessel 200. In this embodiment, only the spiral segment 111 participates in the stirring of the reaction liquid 300 within the reaction vessel 200. As mentioned above, the spiral segment 111 has a good stirring effect on the reaction liquid 300, which is beneficial to improving the mixing efficiency and mixing effect of the reaction liquid 300.

[0048] In some embodiments, the sum of the length of the spiral section 111 and the length of the second connecting section 1122 is greater than the height of the reaction vessel 200. That is, in actual use, only the stirring section 11 enters the reaction vessel 200. In this embodiment, the connection between the stirring section 11 and the fixing section 12 can be prevented from entering the reaction vessel 200, thereby preventing the acidic reagents inside the reaction vessel 200 from corroding the connection between the stirring section 11 and the fixing section 12. It is understood that acidic reagents may be used inside the reaction vessel 200 according to the needs of the testing project or during cleaning. When the stirring section 11 and the fixing section 12 are welded, if the connection between the stirring section 11 and the fixing section 12 enters the reaction vessel 200, the acidic reagents will corrode the weld joint at the connection between the stirring section 11 and the fixing section 12.

[0049] In some embodiments, the ratio of the length of the helical segment 111 to the length of the second connecting segment 1122 is 0.8 to 1.2. In some embodiments, the ratio of the length of the helical segment 111 to the length of the second connecting segment 1122 is one of 0.8, 0.9, 1.0, 1.1, 1.2 or any value between any two adjacent ratios.

[0050] like Figure 4 As shown, in some embodiments, the fixing part 12 includes a first rod 123 and a second rod 124. The first rod 123 includes a first end and a second end, and the first end is connected to the stirring part 11. The second rod 124 is connected to the second end of the first rod 123 and is coaxially arranged with the first rod 123. The second rod 124 is provided with a connecting part 1241 and a gripping part 1242. The connecting part 1241 is used to engage with the driving mechanism 41, and the gripping part 1242 is used for the gripping mechanism to grip the stirring rod 10 until it engages with the driving mechanism 41. In some embodiments, the first rod 123 is provided with a slot 121, and the long straight section 112 is at least partially embedded in the slot 121.

[0051] It should be noted that the fixing part 12 is not limited to including the first rod 123 and the second rod 124. For example, in some other embodiments, the fixing part 12 may only have the first rod 123, on which a connection structure for connecting with the drive mechanism 41 is directly formed.

[0052] like Figures 1 to 7As shown in the figure, an embodiment of this utility model also proposes a sample analyzer 100, which includes a sample dispensing mechanism 20, a reagent dispensing mechanism 30, a stirring mechanism 40, an incubation mechanism 50, and a detection mechanism 60. The sample dispensing mechanism 20 is used to draw samples from a sample container and dispense the drawn samples into a reaction container 200. The reagent dispensing mechanism 30 is used to draw reagents from a reagent container and dispense the drawn reagents into the reaction container 200 to mix with the sample to form a reaction solution 300. The stirring mechanism 40 includes a driving mechanism 41 and a stirring rod 10. The driving mechanism 41 is used to drive the stirring rod 10 to rotate to stir and mix the reaction solution 300 in the reaction container 200. The incubation mechanism 50 is used to incubate the stirred and mixed reaction solution 300. The detection device is used to perform optical measurements on the incubated reaction solution 300. The stirring rod 10 includes a stirring section 11 and a fixing section 12. The stirring section 11 includes a spiral section 111, which is at least partially immersed in the reaction liquid 300 inside the reaction vessel 200 to stir the reaction liquid 300 inside the reaction vessel 200 when rotating. The fixing section 12 is connected to the stirring section 11 and is used to connect to the drive mechanism 41. The stirring section 11 and the fixing section 12 are not integrally formed.

[0053] In some embodiments, the sample dispensing mechanism 20 includes a sample needle, which moves in two or three dimensions in space via a two-dimensional or three-dimensional drive mechanism 41, thereby moving the sample needle to pick up the sample carried by the sample container, and to move to the reaction container 200 to be sampled, and to discharge the sample into the reaction container 200.

[0054] In some embodiments, the reagent dispensing mechanism 30 includes a reagent needle, which moves in two or three dimensions in space via a two-dimensional or three-dimensional driving mechanism 41, thereby allowing the reagent needle to move to draw up the reagent carried by the reagent container, move to the reaction container 200 to which the reagent is to be added, and discharge the reagent into the reaction container 200.

[0055] In some embodiments, the incubation mechanism 50 is used to incubate the reaction solution 300 formed by mixing the sample and reagent in the reaction container 200. The incubation mechanism 50 is mainly used to provide a suitable reaction environment (such as a temperature environment within a preset range) for the sample and reagent so that the sample and reagent react fully and quickly.

[0056] In some embodiments, the testing unit 60 detects the luminescence intensity of the mixture to be tested and calculates the concentration of the component to be tested in the sample through a calibration curve.

[0057] The sample analyzer 100 proposed in this embodiment includes a stirring rod 10 of the stirring mechanism 40, which includes a spiral section 111 for stirring the reaction liquid 300. During the rotation and stirring of the reaction liquid 300, the spiral section 111 can simultaneously generate bidirectional flow in both the axial and radial directions, achieving three-dimensional turbulence and promoting mutual diffusion between different liquid phases, thus improving the mixing efficiency and effect of the reaction liquid 300. Secondly, by designing the stirring part 11 and the fixing part 12 to be non-integrated, i.e., the stirring part 11 and the fixing part 12 are processed independently, the processing difficulty of the stirring rod 10 can be reduced. This reduced processing difficulty facilitates control over the consistency of the structural dimensions of the stirring rod 10, avoiding situations where poor dimensional consistency of the stirring rod 10 affects the test results. Furthermore, by designing the stirring part 11 and the fixing part 12 to be non-integrated, when the stirring part 11 is scrapped, the entire stirring rod 10 is not scrapped, thus reducing processing and material costs.

[0058] In some embodiments, the fixing part 12 is columnar, and the stirring part 11 is connected to one end of the fixing part 12 and is coaxially arranged with the fixing part 12.

[0059] In some embodiments, the stirring part 11 further includes a long straight section 112, one end of which is connected to the spiral section 111, and the other end of which is connected to the fixing part 12.

[0060] In some embodiments, a slot 121 is provided at one end of the fixing part 12 that is connected to the long straight section 112, and the long straight section 112 is at least partially embedded in the slot 121.

[0061] In some embodiments, the long straight section 112 includes a first connecting section 1121 and a second connecting section 1122. The first connecting section 1121 is connected to the fixing part 12, and the second connecting section 1122 is connected between the spiral section 111 and the first connecting section 1121.

[0062] In some embodiments, the length of the spiral segment 111 is greater than or equal to the liquid level of the reaction liquid 300 inside the reaction vessel 200.

[0063] In some embodiments, the sum of the length of the helical segment 111 and the length of the second connecting segment 1122 is greater than the height of the reaction vessel 200.

[0064] In some embodiments, the ratio of the length of the spiral segment 111 to the length of the second connecting segment 1122 is 0.8 to 1.2.

[0065] In some embodiments, the stirring part 11 is formed by twisting a long, straight sheet.

[0066] In some embodiments, the stirring part 11 and the fixing part 12 are fixedly connected by welding, bonding or laser cladding.

[0067] In some embodiments, the fixing part 12 includes a first rod 123 and a second rod 124. The first rod 123 includes a first end and a second end. The first end is connected to the stirring part 11. The second rod 124 is connected to the second end of the first rod 123 and is coaxially arranged with the first rod 123. The second rod 124 is provided with a connecting part 1241 and a gripping part 1242. The sample analyzer 100 also includes a gripping mechanism for clamping the gripping part 1242 of the stirring rod 10 and transferring the stirring rod 10 to the driving mechanism 41 until the connecting part 1241 of the stirring plate is engaged with the driving mechanism 41.

[0068] The structure, connection relationship, extended description and beneficial effects of other components of the sample analyzer 100 proposed in this embodiment can be referred to the above description, and will not be repeated here.

[0069] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A stirring rod for a sample analyzer, characterized in that, The stirring rod includes: The stirring section includes a spiral section for at least partially immersing itself in the reaction liquid within the reaction vessel to stir the reaction liquid within the reaction vessel during rotation; A fixing part is connected to the stirring part, and the fixing part is used to connect to the driving mechanism that drives the stirring rod to rotate; The stirring part and the fixing part are not integrally formed.

2. The stirring rod as described in claim 1, characterized in that, The fixing part is columnar, and the stirring part is connected to one end of the fixing part and is coaxially arranged with the fixing part.

3. The stirring rod as described in claim 1, characterized in that, The stirring section also includes a long straight section, one end of which is connected to the spiral section, and the other end of which is connected to the fixing section.

4. The stirring rod as described in claim 3, characterized in that, The fixed part is provided with a slot at one end where it is connected to the long straight section, and the long straight section is at least partially embedded in the slot.

5. The stirring rod as described in claim 3, characterized in that, The long straight section includes a first connecting section and a second connecting section. The first connecting section is connected to the fixing part, and the second connecting section is connected between the spiral section and the first connecting section.

6. The stirring rod as described in claim 5, characterized in that, The length of the spiral segment is greater than or equal to the liquid level of the reaction liquid in the reaction vessel; and / or, The sum of the length of the helical segment and the length of the second connecting segment is greater than the height of the reaction vessel; and / or, The ratio of the length of the spiral segment to the length of the second connecting segment is 0.8 to 1.

2.

7. The stirring rod as described in claim 1, characterized in that, The stirring section is formed by twisting a long, straight sheet.

8. The stirring rod as described in claim 1, characterized in that, The stirring part and the fixing part are fixedly connected by welding, bonding or laser cladding.

9. The stirring rod as described in claim 1, characterized in that, The fixing part includes: The first rod includes a first end and a second end, wherein the first end is connected to the stirring part; The second rod is connected to the second end of the first rod and is coaxially arranged with the first rod. The second rod body is provided with a connecting part and a gripping part. The connecting part is used to engage with the driving mechanism, and the gripping part is used for the gripping mechanism to grip the stirring rod until it engages with the driving mechanism.

10. A sample analyzer, characterized in that, The system includes a sample dispensing mechanism, a reagent dispensing mechanism, a stirring mechanism, an incubation mechanism, and a detection mechanism. The sample dispensing mechanism draws a sample from a sample container and dispenses it into a reaction container. The reagent dispensing mechanism draws a reagent from a reagent container and dispenses it into the reaction container, mixing it with the sample to form a reaction solution. The stirring mechanism includes a drive mechanism and a stirring rod. The drive mechanism drives the stirring rod to rotate and stir the reaction solution in the reaction container. The incubation mechanism incubates the stirred and mixed reaction solution. The detection device performs optical measurements on the incubated reaction solution. The stirring rod includes: The stirring section includes a spiral section for at least partially immersing itself in the reaction liquid within the reaction vessel to stir the reaction liquid within the reaction vessel during rotation; A fixing part is connected to the stirring part, and the fixing part is used to connect to the driving mechanism; The stirring part and the fixing part are not integrally formed.

11. The sample analyzer as described in claim 10, characterized in that, The fixing part is columnar, and the stirring part is connected to one end of the fixing part and is coaxially arranged with the fixing part.

12. The sample analyzer as described in claim 10, characterized in that, The stirring section also includes a long straight section, one end of which is connected to the spiral section, and the other end of which is connected to the fixing section.

13. The sample analyzer as described in claim 12, characterized in that, The fixed part is provided with a slot at one end where it is connected to the long straight section, and the long straight section is at least partially embedded in the slot.

14. The sample analyzer as described in claim 12, characterized in that, The long straight section includes a first connecting section and a second connecting section. The first connecting section is connected to the fixing part, and the second connecting section is connected between the spiral section and the first connecting section.

15. The sample analyzer as described in claim 14, characterized in that, The length of the spiral segment is greater than or equal to the liquid level of the reaction liquid in the reaction vessel; and / or, The sum of the length of the helical segment and the length of the second connecting segment is greater than the height of the reaction vessel; and / or, The ratio of the length of the spiral segment to the length of the second connecting segment is 0.8 to 1.

2.

16. The sample analyzer as described in claim 10, characterized in that, The stirring section is formed by twisting a long, straight sheet.

17. The sample analyzer as described in claim 10, characterized in that, The stirring part and the fixing part are fixedly connected by welding, bonding or laser cladding.

18. The sample analyzer as described in claim 10, characterized in that, The fixing part includes a first rod and a second rod. The first rod includes a first end and a second end. The first end is connected to the stirring part. The second rod is connected to the second end of the first rod and is coaxially arranged with the first rod. The second rod is provided with a connecting part and a gripping part. The sample analyzer also includes a gripping mechanism for holding the gripping part of the stirring rod and transferring the stirring rod to the driving mechanism until the connecting part of the stirring rod engages with the driving mechanism.

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