Sample analyzer for instant inspection

Abstract

The utility model discloses a sample analyzer for instant inspection, which is characterized in that a kit is received by a bearing seat, and a sample to be detected is stored in the kit; the detection mechanism is located on one side of the bearing seat, and the bearing seat is used for bearing the kit to move in the first direction so that the kit can be in butt joint with the detection mechanism; the first movement mechanism is located on the other side of the bearing base and used for driving the bearing base to move, the projection of the detection mechanism on the horizontal plane where the bearing base is placed is a first projection, the projection of the first movement mechanism on the horizontal plane is a second projection, and the second projection and the first projection are arranged in the first direction. According to the scheme, the projections of the first movement mechanism and the detection mechanism on the horizontal plane do not coincide, interference of the first movement mechanism and the detection mechanism on the mounting position can be avoided, electromagnetic signal interference of the first movement mechanism on the detection mechanism is reduced, the accuracy of impedance detection of the detection mechanism on the kit is improved, and the detection efficiency is improved. And the accuracy of the sample analyzer is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a sample analyzer for point-of-care testing. Background Technology

[0002] In the field of medical devices, sample analyzers can automatically analyze various cells in samples such as blood and urine to obtain various component indicators of bleeding cells. Furthermore, sample analyzers can place the sample to be tested into a reagent kit for immediate detection, thereby improving testing speed and allowing users to quickly obtain test results.

[0003] Existing sample analyzers drive the reagent kit via a first motion mechanism to mate the kit with the detection mechanism for detection. However, in existing first motion mechanisms, the motor and the electrodes of the detection mechanism are mounted on the same side plate of the support. When the reagent kit contacts the electrodes, the electromagnetic components in the motor can affect the accuracy of impedance detection within the kit, thus hindering the improvement of the sample analyzer's accuracy. Utility Model Content

[0004] To address the technical problem of motors affecting the accuracy of impedance detection in existing technologies, this application provides a sample analyzer for real-time testing.

[0005] To address the technical problems existing in the prior art, this application provides a sample analyzer for point-of-care testing. The sample analyzer includes a support, a detection mechanism, and a first motion mechanism. The support is used to receive a reagent kit, which stores a sample to be tested. The detection mechanism is located on one side of the support, and the support is used to carry the reagent kit and move it along a first direction so that the reagent kit docks with the detection mechanism and tests the sample to be tested. The first motion mechanism is located on the other side of the support and is used to drive the support to move. The projection of the detection mechanism on the horizontal plane on which the support is placed is a first projection, and the projection of the first motion mechanism on the horizontal plane is a second projection. The second projection and the first projection are arranged along the first direction.

[0006] Optionally, the projection of the detection mechanism on the vertical plane is a third projection, and the projection of the first motion mechanism on the vertical plane is a fourth projection. The third projection and the fourth projection do not coincide, and the vertical plane is perpendicular to the horizontal plane.

[0007] Optionally, the above-mentioned detection mechanism further includes an electrode connector, and the above-mentioned reagent kit is used to dock with the electrode connector to detect the sample to be tested; the above-mentioned sample analyzer further includes a substrate, a side plate, and a top plate; a guide rail is provided on the substrate, and the above-mentioned carrier moves along the first direction via the guide rail; the above-mentioned side plate is perpendicular to the above-mentioned substrate, and the above-mentioned electrode connector is disposed on the above-mentioned side plate; the above-mentioned top plate is disposed on the above-mentioned side plate and opposite to the above-mentioned substrate, and the above-mentioned first motion mechanism is disposed on the above-mentioned top plate; the above-mentioned first motion mechanism drives the carrier to move via a transmission member.

[0008] Optionally, the sample analyzer further includes a pipetting mechanism and a second motion mechanism; the pipetting mechanism is disposed above the support base; the second motion mechanism is disposed on one side of the pipetting mechanism, the second motion mechanism is used to drive the pipetting mechanism to move in a vertical direction so that the pipetting mechanism can be inserted into a pipette tip, the pipetting mechanism is used to perform liquid transfer operation on the reagent kit through the pipette tip, and the pipetting mechanism is also used to unload the pipette tip after completing the liquid transfer operation.

[0009] Optionally, the above-mentioned pipetting mechanism includes a support base, a blocking member, and a mounting member. The support base is used to support the second motion mechanism. The blocking member is disposed on the support base and sleeved on the mounting member. The second motion mechanism is connected to the mounting member and is used to drive the mounting member to move in the vertical direction so that the mounting member can be inserted into or unloaded from the pipette tip.

[0010] Optionally, the mounting component includes a mounting body and a pickup head. The pickup head is disposed at the end of the mounting body away from the blocking member. The second motion mechanism is used to drive the mounting component to move downward in the vertical direction. The inner wall of the straw head cooperates with the pickup head to lock the straw head in place. The second motion mechanism is used to drive the mounting component to move upward in the vertical direction. The blocking member abuts against the straw head to unload the straw head.

[0011] Optionally, the pickup head has at least a first protruding ring and a second protruding ring. The first protruding ring is disposed at the end of the pickup head away from the mounting body, and the second protruding ring is disposed at the end of the pickup head close to the mounting body. The inner wall of the straw head abuts against the ring walls of the first protruding ring and the second protruding ring, respectively, so that the straw head is locked with the pickup head.

[0012] Optionally, the two sides of the protrusion point of the largest cross-section on the first convex ring are respectively a first arc surface and a second arc surface, the first arc surface is located on the side of the first convex ring away from the second convex ring, and the radius of the first arc surface is greater than the radius of the second arc surface.

[0013] Optionally, the pickup head further includes an extension, the first convex ring being connected to the second convex ring via the extension, and the first convex ring, the extension, and the second convex ring forming a groove structure.

[0014] Optionally, the maximum cross-sectional radius of the first convex ring is the first radius, the maximum cross-sectional radius of the second convex ring is the second radius, the maximum cross-sectional radius of the extension is the third radius, the second radius is greater than the first radius, and the first radius is greater than the third radius.

[0015] This application provides a sample analyzer for point-of-care testing, comprising a support, a detection mechanism, and a first motion mechanism. The support receives a reagent kit containing a sample to be tested. The detection mechanism is located on one side of the support, which carries the reagent kit and moves it along a first direction to align the kit with the detection mechanism for testing the sample. The first motion mechanism is located on the other side of the support and drives the support to move. The projection of the detection mechanism onto the horizontal plane on which the support is placed is a first projection, and the projection of the first motion mechanism onto the horizontal plane is a second projection. The second and first projections are arranged along the first direction. With this design, the projections of the first motion mechanism and the detection mechanism onto the horizontal plane do not overlap, avoiding interference between them at their installation positions. This also reduces electromagnetic interference from the first motion mechanism to the detection mechanism, improves the accuracy of impedance testing of the reagent kit by the detection mechanism, and enhances the overall accuracy of the sample analyzer. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the first embodiment of the sample analyzer for point-of-care testing provided in this application;

[0018] Figure 2 This is a schematic diagram of the second embodiment of the sample analyzer for point-of-care testing provided in this application;

[0019] Figure 3 yes Figure 2 A cross-sectional view taken along the AA′ section line;

[0020] Figure 4 yes Figure 2 A schematic diagram of the structure of the mounting component.

[0021] In the figure, 10 is the support base; 20 is the detection mechanism; 30 is the first motion mechanism; 40 is the pipetting mechanism; 41 is the support base; 42 is the blocking component; 43 is the mounting component; 431 is the mounting body; 432 is the pickup head; 433 is the first convex ring; 433a is the first arc surface; 433b is the second arc surface; 434 is the second convex ring; 435 is the extension; 44 is the pipette tip; 50 is the second motion mechanism; 61 is the base plate; and 62 is the side plate. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0023] In this document, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or connections separated by an intermediate medium. For those skilled in the art, if directional indicators (such as up, down, left, right, front, back, etc.) are involved in the embodiments of this application, these directional indicators are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Please see Figure 1 , Figure 1 This is a schematic diagram of the first embodiment of the sample analyzer for point-of-care testing provided in this application. Figure 1 As shown, the sample analyzer includes a support base 10, a detection mechanism 20, and a first motion mechanism 30.

[0026] The carrier 10 is used to receive the reagent kit, which stores the sample to be tested. The detection mechanism 20 is located on one side of the carrier 10. The carrier 10 is used to carry the reagent kit and move it along a first direction so that the reagent kit docks with the detection mechanism 20 and the sample to be tested is detected. The first motion mechanism 30 is located on the other side of the carrier 10. The first motion mechanism 30 is used to drive the carrier 10 to move. The projection of the detection mechanism 20 on the horizontal plane on which the carrier 10 is placed is the first projection. The projection of the first motion mechanism 30 on the horizontal plane is the second projection. The second projection and the first projection are arranged along the first direction.

[0027] Specifically, the sample analyzer may include a base, which includes a substrate 61. A guide rail is provided on the substrate 61, and the carrier 10 moves along the guide rail in a first direction. A first motion mechanism 30 drives the carrier 10 to slide along the guide rail, thereby moving the reagent kit in the first direction. Understandably, the base may have an opening through which the reagent kit enters the base and is placed on the carrier 10. The first direction may be the direction in which the opening faces the interior of the base. The horizontal plane on which the carrier 10 is placed can be understood as a relative plane on which the carrier 10 is placed. This horizontal plane may be parallel to the ground plane, a preset reference plane, or the plane on which the substrate 61 is located; no specific limitation is made here.

[0028] The detection mechanism 20 is disposed inside the base and located on the side of the support 10 away from the opening. When the first motion mechanism 30 drives the support 10 to slide along the substrate 61 and causes the reagent kit to move in the first direction, at the end of the reagent kit's movement path, the reagent kit docks with the detection mechanism 20 to make the reagent kit and the detection mechanism 20 electrically connected. The detection mechanism 20 can perform impedance detection on the sample to be tested from the reagent kit. The detection mechanism 20 may include an electrode connector and a detection circuit. The detection circuit is connected to the electrode connector via a wire. When the reagent kit docks with the detection mechanism 20, the detection electrodes of the reagent kit are aligned and connected. The electrode connector is used to guide external current or voltage signals to the reagent kit. The current or voltage signals contact the sample to be tested through the detection electrodes. The detection circuit is used to collect the electrical pulse signals of the sample to be tested during the detection process, characterize the blood cell characteristics of the sample to obtain the sample detection results. During this process, because the electrical pulse signals are relatively sensitive and weak, if the first motion mechanism 30 and the detection mechanism 20 are close together, the motor of the first motion mechanism 30 may easily generate electromagnetic interference to the electrical pulse signals during operation.

[0029] In this embodiment, the projections of the first motion mechanism 30 and the detection mechanism 20 of the sample analyzer on the horizontal plane do not overlap, so that the positions of the first motion mechanism 30 and the detection mechanism 20 are relatively far apart. This can avoid interference between the first motion mechanism 30 and the detection mechanism 20 in the installation position, reduce the electromagnetic signal interference of the first motion mechanism 30 to the detection mechanism 20, improve the accuracy of the detection mechanism 20 in impedance detection of the reagent kit, and improve the accuracy of the sample analyzer.

[0030] In one embodiment, the projection of the detection mechanism 20 onto the vertical plane is a third projection, and the projection of the first motion mechanism 30 onto the vertical plane is a fourth projection. The third projection and the fourth projection do not coincide, and the vertical plane is perpendicular to the horizontal plane.

[0031] Specifically, in one embodiment, a vertical plane perpendicular to the aforementioned horizontal plane can be defined. The projection of the detection mechanism 20 onto the vertical plane is called the third projection, and the projection of the first motion mechanism 30 onto the vertical plane is called the fourth projection. The third and fourth projections do not coincide. In another embodiment, the detection mechanism 20 and the first motion mechanism 30 are based on a difference in height from the horizontal plane. For example, the height of the first motion mechanism 30 is greater than the height of the detection mechanism 20, or the height of the detection mechanism 20 is greater than the height of the first motion mechanism 30.

[0032] In this embodiment, the projections of the detection mechanism 20 and the first motion mechanism 30 on the vertical plane do not overlap, that is, the detection mechanism 20 and the first motion mechanism 30 are staggered in the height direction, so that the positions of the first motion mechanism 30 and the detection mechanism 20 are relatively far apart. This can avoid interference between the first motion mechanism 30 and the detection mechanism 20 in the installation position, reduce the electromagnetic signal interference of the first motion mechanism 30 to the detection mechanism 20, improve the accuracy of the impedance detection of the reagent kit by the detection mechanism 20, and improve the accuracy of the sample analyzer.

[0033] Optionally, the detection mechanism 20 further includes an electrode connector, and the reagent kit is used to dock with the electrode connector to detect the sample. The first motion mechanism 30 may include a first drive motor and a transmission component, and the shaft of the first drive motor is connected to the support base 10 through the transmission component. The sample analyzer also includes a base plate 61, a side plate 62, and a top plate (not shown). The base plate 61 is used to support the support base 10; the side plate 62 is arranged perpendicular to the base plate 61 and surrounds the base plate 61 circumferentially, and the electrode connector is disposed on the side plate 62; the top plate is disposed on the side plate 62 and opposite to the base plate 61, the first motion mechanism 30 is disposed on the top plate, and the first motion mechanism 30 drives the support base 10 to move along a first direction of the guide rail through the transmission component.

[0034] Specifically, the aforementioned vertical plane can be the plane where the side plate 62 is located, or it can be a vertical plane perpendicular to a reference plane such as the ground plane. The first drive motor of the first motion mechanism 30 is disposed on the top plate, so that the first motion mechanism 30, the reagent kit, and the support 10 can be arranged in the height direction to reduce the floor space occupied by the first motion mechanism 30 on the horizontal plane; and by disposing of the electrode connector on the side plate 62 and the first motion mechanism 30 on the top plate, the positions of the first motion mechanism 30 and the detection mechanism 20 can be relatively far apart, avoiding interference in the installation position and reducing electromagnetic signal interference of the first motion mechanism 30 to the detection mechanism 20, thereby improving the accuracy of the detection mechanism 20 in impedance detection of the reagent kit. In a possible embodiment, the sample analyzer also includes a pipetting mechanism 40, which is disposed on the top plate and located on one side of the first motion mechanism 30 to facilitate the up-and-down operation of the pipetting mechanism 40 during pipetting. Therefore, in this embodiment, placing the first motion mechanism 30 on the top plate can fully utilize the unused space of the pipetting mechanism 40 in the height direction, reduce the overall space occupied by the sample analyzer, and improve the portability of the sample analyzer.

[0035] In other embodiments, the first drive motor of the first motion mechanism 30 may be disposed on the base plate 61 and located on one side of the support 10. Alternatively, the side plate 62 may include side plates 62 in four directions, and the first motion mechanism 30 may also be disposed on other side plates 62 away from the electrode connector. No specific limitation is made here. The transmission component of the first motion mechanism 30 may be transmitted by means of, but is not limited to, gears, belts, chains, worm gears, screws, etc.

[0036] In one embodiment, please refer to Figure 2 , Figure 2 This is a schematic diagram of the second embodiment of the sample analyzer for point-of-care testing provided in this application. Figure 1 and Figure 2 As shown, the sample analyzer also includes a pipetting mechanism 40 and a second motion mechanism 50. The pipetting mechanism 40 is disposed above the support base 10; the second motion mechanism 50 is disposed on one side of the pipetting mechanism 40, and is used to drive the pipetting mechanism 40 to move vertically so that the pipetting mechanism 40 can be inserted into the pipette tip 44. The pipetting mechanism 40 is used to perform liquid transfer operations on the reagent kit through the pipette tip 44. The pipetting mechanism 40 is also used to unload the pipette tip 44 after the liquid transfer operation is completed.

[0037] Specifically, the kit may include multiple cells, including detection cells and non-detection cells. The detection cells are used to hold the sample to be tested, and the detection mechanism 20 is used to perform impedance detection on the sample to be tested in the detection cells. The non-detection cells may be, but are not limited to, at least one cell used to hold reagents, samples, waste liquid, and pipette tips 44. For example, the non-detection pool of the kit includes a first pool carrying a pipette tip 44, a second pool carrying a sample, and a third pool carrying reagents. A second motion mechanism 50 drives the pipetting mechanism 40 to move vertically, so that the pipetting mechanism 40 inserts into the pipette tip 44 of the first pool and mixes the sample in the second pool with the reagents in the third pool through the pipette tip 44 to prepare a sample to be tested and store it in the detection pool. Alternatively, the non-detection pool of the kit includes a first pool carrying a pipette tip 44 and a second pool carrying a sample. The pipetting mechanism 40 inserts into the pipette tip 44 of the first pool. The sample analyzer has a reagent storage mechanism for storing reagents. The pipetting mechanism 40 mixes the sample in the second pool with the reagents in the reagent storage mechanism through the pipette tip 44 to prepare a sample to be tested and store it in the detection pool. In other embodiments, the sample analyzer may also have a pipette tip 44 storage mechanism. The pipetting mechanism 40 is used to insert a pipette tip 44 from the pipette tip 44 storage mechanism for liquid transfer of the kit.

[0038] Through the above-described manner, the cooperation between the second motion mechanism 50 and the pipetting mechanism 40 enables the pipetting mechanism 40 to transfer liquid from the reagent kit via the pipette tip 44, thereby preparing the sample to be tested. Typically, the pipette tip 44 is for single use only. After sample preparation, the pipette tip 44 can be unloaded onto any compartment of the reagent kit, allowing it to be removed with the kit after use. This convenient method reduces the need for liquid tubing setup and cleaning operations in the sample analyzer, thereby improving the efficiency of liquid transfer and sample preparation.

[0039] Optionally, please see Figure 3 , Figure 3 yes Figure 2 A cross-sectional view cut along section line AA. (See figure) Figure 2 and Figure 3 As shown, the pipetting mechanism 40 includes a support base 41, a blocking member 42, and a mounting member 43. The support base 41 is used to support the second motion mechanism 50. The blocking member 42 is disposed on the support base 41 and sleeved on the mounting member 43. The second motion mechanism 50 is connected to the mounting member 43. The second motion mechanism 50 is used to drive the mounting member 43 to move in the vertical direction so that the mounting member 43 can insert or unload the pipette head 44.

[0040] Specifically, the support base 41 of the pipetting mechanism 40 can be disposed on the top plate. The support base 41 is used to support the second motion mechanism 50. The second motion mechanism 50 may include a second drive motor. The shaft of the second drive motor is connected to the mounting member 43 to drive the mounting member 43 to move vertically and slide relative to the blocking member 42. For example, the second motion mechanism 50 is used to drive the mounting member 43 to move downward vertically. The pipette tip 44 can be placed on the non-detection cell of the reagent kit or the pipette tip 44 storage mechanism of the sample analyzer. The mounting member 43 is used to contact and lock with the pipette tip 44 during the downward movement to realize the insertion of the pipette tip 44. After the pipetting is completed, the second motion mechanism 50 drives the mounting part 43 to move upward in the vertical direction, so that the mounting part 43 slides in the direction close to the blocking part 42. The insertion position of the mounting part 43 and the pipette head 44 abuts against the blocking part 42. When the mounting part 43 continues to move upward, the lower end of the blocking part 42 can block the pipette head 44, so that the pipette head 44 moves downward and is released from the mounting part 43, thereby unloading the pipette head 44.

[0041] In the above manner, the sample analyzer of this embodiment can realize the insertion or removal of the pipette head 44 through the cooperation of the blocking member 42 and the mounting member 43. The structure is simple and easy to implement, which helps to reduce the structural complexity of the sample analyzer and improve the structural compactness of the sample analyzer, thereby making the sample analyzer suitable for portable, real-time detection and other scenarios.

[0042] Furthermore, the mounting component 43 includes a mounting body 431 and a pickup head 432. The pickup head 432 is disposed at the end of the mounting body 431 away from the blocking member 42. The second motion mechanism 50 is used to drive the mounting component 43 to move downward in the vertical direction. The inner wall of the straw head 44 cooperates with the pickup head 432 to lock the straw head 44 and the pickup head 432. The second motion mechanism 50 is used to drive the mounting component 43 to move upward in the vertical direction. The blocking member 42 abuts against the straw head 44 to unload the straw head 44.

[0043] Specifically, the shape and size of the pickup head 432 roughly correspond to the pipette head 44. The outer surface of the pickup head 432 may have at least one relative protrusion. When inserting the pipette head 44, the relative protrusion on the outer surface of the pickup head 432 is used to engage with the inner wall of the pipette head 44, so that the pipette head 44 and the pickup head 432 are locked together, ensuring the installation of the pipette head 44 firmly, reducing or avoiding the pipette head 44 from falling off due to vibrations such as collisions and impacts during the pipetting process, and reducing or avoiding poor sealing and leakage caused by the pipette head 44 not being firmly installed on the pickup head 432, thereby improving the reliability of the pipetting mechanism 40.

[0044] Further, please see Figure 4 , Figure 4 yes Figure 2 A structural diagram of the mounting components. (See diagram below.) Figure 3 and Figure 4 As shown, the pickup head 432 has at least a first protruding ring 433 and a second protruding ring 434. The first protruding ring 433 is disposed at the end of the pickup head 432 away from the mounting body 431, and the second protruding ring 434 is disposed at the end of the pickup head 432 close to the mounting body 431. The inner wall of the straw head 44 abuts against the ring walls of the first protruding ring 433 and the second protruding ring 434 respectively, so that the straw head 44 is locked with the pickup head 432.

[0045] Specifically, the pickup head 432 has at least a first protruding ring 433 and a second protruding ring 434 arranged along the extending direction. The pickup head 432 may also have multiple opposing protrusions. For example, the pickup head 432 may also have a third protruding ring, a fourth protruding ring, etc., between the first protruding ring 433 and the second protruding ring 434. No specific limitation is made here. In this embodiment, by setting the first protruding ring 433 and the second protruding ring 434, when the straw head 44 is inserted, the straw head 44 is first snapped into place by the first protruding ring 433 and then contacts the second protruding ring 434. The double-layer snapping method improves the fixing effect of the straw head 44 and reduces or avoids the straw head 44 falling off, poor sealing, leakage, etc. due to insecure installation.

[0046] Among them, the two sides of the protrusion point of the largest cross-section on the first convex ring 433 are the first arc surface 433a and the second arc surface 433b, respectively. The first arc surface 433a is located on the side of the first convex ring 433 away from the second convex ring 434, and the radius of the first arc surface 433a is greater than the radius of the second arc surface 433b.

[0047] Specifically, such as Figure 4 As shown, the first convex ring 433 has a convex point with the largest cross-section, which corresponds to... Figure 4 The point at position a is the one with the largest radius, diameter, and cross-sectional area, or the one furthest from the central axis of the mounting component 43. Here, the two sides of the point on the first convex ring 433 are defined as the first arc surface 433a and the second arc surface 433b, respectively. The first arc surface 433a is the end of the first convex ring 433 furthest from the second convex ring 434, and the second arc surface 433b is the side of the first convex ring 433 closest to the second convex ring 434.

[0048] In this embodiment, the radius of the first arc surface 433a is greater than the radius of the second arc surface 433b. That is, under the same arc length, the curvature of the first arc surface 433a is less. The relatively sharp first arc surface 433a at the end is beneficial to play a guiding role, which is beneficial to the insertion of the straw head 44 and the first convex ring 433, and improves the fault tolerance rate when the straw head 44 is inserted.

[0049] Furthermore, the first convex ring 433 can be divided into multiple arc surfaces. For example, the first convex ring 433 may have multiple arc surfaces distributed along the direction of gravity, and the radii of the multiple arc surfaces gradually increase; or, the first arc surface 433a and the second arc surface 433b may be further divided into multiple arc surfaces with different radii, without specific limitations here. In other embodiments, the side of the first convex ring 433 away from the second convex ring 434 may be a hemisphere.

[0050] The pickup head 432 also includes an extension 435. The first convex ring 433 is connected to the second convex ring 434 through the extension 435. The first convex ring 433, the extension 435 and the second convex ring 434 form a groove structure.

[0051] Specifically, the extension 435 connects the first convex ring 433 and the second convex ring 434, so that the first convex ring 433, the extension 435, and the second convex ring 434 form a groove structure. The first convex ring 433 and the second convex ring 434 serve as curved surfaces on both sides of the groove, and the extension 435 serves as a recessed portion on the curved surfaces of the first convex ring 433 and the second convex ring 434. The maximum cross-sectional radius of the extension 435 is smaller than the maximum cross-sectional radius of the first convex ring 433 and the second convex ring 434. The extension 435 can be a cylindrical extension 435, or it can be a frustum-shaped extension, a square prism, etc. The shape of the extension 435 is not specifically limited here. Therefore, by connecting the first protruding ring 433 and the second protruding ring 434 through the extension 435, the first protruding ring 433, the extension 435, and the second protruding ring 434 form a groove structure. This ensures the installation strength when the first protruding ring 433 and the second protruding ring 434 are engaged with the inner wall of the straw head 44. At the same time, it creates an air column at the position of the extension 435, reducing the contact area with the inner wall of the straw head 44. This avoids excessive contact area and excessive bonding strength caused by the abutment of the extension 435 with the inner wall of the straw head 44, which would make it difficult to unload the straw head 44 and improve the reliability of the straw head 44 during insertion.

[0052] Possibly, the maximum cross-sectional radius of the first convex ring 433 is the first radius, the maximum cross-sectional radius of the second convex ring 434 is the second radius, and the maximum cross-sectional radius of the extension 435 is the third radius. The second radius is greater than the first radius, and the first radius is greater than the third radius.

[0053] Specifically, such as Figure 4 As shown, the maximum cross-sectional radius of the first convex ring 433 can be understood as the radius r of the cross-section at the convex point position in line a above. a The maximum cross-sectional radius of the second convex ring 434 is the radius r of the maximum cross-section of the second convex ring 434 in line c. c When the extension 435 is cylindrical, the maximum cross-sectional radius of the extension 435 is the radius of the cylinder, such as... Figure 4 The mid-b line has a cross-sectional radius rb When the extension 435 is in the shape of a frustum, the cross-sectional radius of the extension 435 on the side closer to the second convex ring 434 can be greater than the cross-sectional radius on the side closer to the first convex ring 433. Alternatively, the cross-sectional radius of the extension 435 on the side closer to the second convex ring 434 can be smaller than the cross-sectional radius on the side closer to the first convex ring 433. In this case, the maximum cross-sectional radius of the extension 435 can be the radius of the end face connected to the first convex ring 433 or the second convex ring 434.

[0054] In this embodiment, the second radius is greater than the first radius, and the first radius is greater than the third radius. This can be understood as follows: when the pipetting mechanism 40 inserts the pipette tip 44, the pipette tip 44 first engages with the first convex ring 433, and then engages with the second convex ring 434 after the extension 435. Since the first radius is greater than the third radius and the first radius is less than or equal to the second radius, the engagement strength between the first convex ring 433 and the pipette tip 44 is less than or equal to the engagement strength between the second convex ring 434 and the pipette tip 44. This facilitates the insertion of the first convex ring 433 and the pipette tip 44, and also allows the second convex ring 434 to hold the pipette tip 44 as tightly as possible, avoiding problems such as the pipette tip 44 being stuck too deeply and difficult to unload due to the pipette tip 44 exceeding the position of the second convex ring 434. Furthermore, the engagement of the protruding positions of the first convex ring 433 and the second convex ring 434 with the inner wall of the pipette tip 44 can also reduce damage to the mounting body 431 during the insertion process of the pipette tip 44.

[0055] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A sample analyzer for point-of-care testing, characterized in that, The sample analyzer includes: A carrier for receiving a reagent kit, wherein the reagent kit stores a sample to be tested; The testing mechanism is located on one side of the support, which is used to carry the reagent kit to move in a first direction so that the reagent kit docks with the testing mechanism and tests the sample to be tested; The first motion mechanism is located on the other side of the support seat. The first motion mechanism is used to drive the support seat to move. The projection of the detection mechanism on the horizontal plane on which the support seat is placed is the first projection. The projection of the first motion mechanism on the horizontal plane is the second projection. The second projection and the first projection are arranged along the first direction.

2. The sample analyzer according to claim 1, characterized in that, The projection of the detection mechanism on the vertical plane is the third projection, and the projection of the first motion mechanism on the vertical plane is the fourth projection. The third projection and the fourth projection do not coincide, and the vertical plane is perpendicular to the horizontal plane.

3. The sample analyzer according to claim 2, characterized in that, The detection mechanism further includes an electrode connector, and the reagent kit is used to interface with the electrode connector to detect the sample to be tested; the sample analyzer further includes: A substrate, on which a guide rail is provided, and a support seat moves along the first direction via the guide rail; A side plate is arranged perpendicularly to the substrate, and the electrode connector is disposed on the side plate; A top plate is disposed on the side plate and opposite to the base plate, and a first motion mechanism is disposed on the top plate; the first motion mechanism drives the support seat to move through a transmission component.

4. The sample analyzer according to claim 1, characterized in that, The sample analyzer also includes: A pipetting mechanism, wherein the pipetting mechanism is disposed above the support base; A second motion mechanism is disposed on one side of the pipetting mechanism. The second motion mechanism is used to drive the pipetting mechanism to move in a vertical direction so that the pipetting mechanism can be inserted into a pipette tip. The pipetting mechanism is used to perform liquid transfer operations on the reagent kit through the pipette tip. The pipetting mechanism is also used to unload the pipette tip after the liquid transfer operation is completed.

5. The sample analyzer according to claim 4, characterized in that, The pipetting mechanism includes a support base, a blocking member, and a mounting member. The support base is used to support the second motion mechanism. The blocking member is disposed on the support base and sleeved on the mounting member. The second motion mechanism is connected to the mounting member and is used to drive the mounting member to move in the vertical direction so that the mounting member can insert or unload the pipette tip.

6. The sample analyzer according to claim 5, characterized in that, The mounting component includes a mounting body and a pickup head. The pickup head is disposed at the end of the mounting body away from the blocking member. The second motion mechanism is used to drive the mounting component to move downward along the vertical direction. The inner wall of the straw head cooperates with the pickup head to lock the straw head with the pickup head. The second motion mechanism is also used to drive the mounting component to move upward along the vertical direction. The blocking member abuts against the straw head to unload the straw head.

7. The sample analyzer according to claim 6, characterized in that, The pickup head has at least a first convex ring and a second convex ring. The first convex ring is located at the end of the pickup head away from the mounting body, and the second convex ring is located at the end of the pickup head close to the mounting body. The inner wall of the straw head abuts against the ring walls of the first convex ring and the second convex ring, respectively, so that the straw head is locked with the pickup head.

8. The sample analyzer according to claim 7, characterized in that, The first convex ring has a first arc surface and a second arc surface on both sides of the convex point of the largest cross section. The first arc surface is located on the side of the first convex ring away from the second convex ring, and the radius of the first arc surface is greater than the radius of the second arc surface.

9. The sample analyzer according to claim 7, characterized in that, The pickup head also includes an extension, and the first convex ring is connected to the second convex ring through the extension. The first convex ring, the extension, and the second convex ring form a groove structure.

10. The sample analyzer according to claim 9, characterized in that, The maximum cross-sectional radius of the first convex ring is the first radius, the maximum cross-sectional radius of the second convex ring is the second radius, and the maximum cross-sectional radius of the extension is the third radius. The second radius is greater than the first radius, and the first radius is greater than the third radius.

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