Test tube rack limit assembly, test tube rotating device, sample injection device and sample analyzer

Abstract

A test tube rack limiting assembly, a test tube rotating device, a sample injection device, and a sample analyzer are disclosed. The test tube rotating device includes a rotating assembly, a test tube rack limiting assembly, and a test tube righting assembly. At least two of the rotating assembly's second drive unit, the test tube rack limiting assembly's third drive unit, and the test tube righting assembly's fourth drive unit are identical, simplifying the structure. Furthermore, integrating at least two of the rotating assembly, the test tube rack limiting assembly, and the test tube righting assembly into a power system makes the overall structure more compact, thereby making the sample injection device and sample analyzer using the test tube rotating device smaller.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a structure for rotating a test tube. Background Art

[0002] Sample introduction devices are used in various sample analyzers and other devices to provide sample feeding. During the sample introduction and testing process, various related operations are required to manage the sample rack and the test tubes (containing samples) on it. For example, in a fully automated coagulation analyzer, the sample rack is scheduled in the sample processing unit. After loading from the loading area, the rack is fed horizontally through the sample handling unit, performing various operations such as tube cap inspection, rotating tube barcode scanning, and sample aspiration. The rack is then unloaded from the unloading area.

[0003] During the rotational scanning of test tube barcodes, the rotating scanning device exerts a force on the test tubes in a certain direction, causing the sample rack to wobble and shift to a certain extent. This shift primarily occurs along the test tube rack's conveyor direction, causing the positions of other test tubes on the rack to shift to varying degrees. To ensure accurate barcode scanning and accurate movement of the sample needle to the center of the test tube during aspiration, the sample rack and test tubes must be fixed appropriately to ensure accurate positioning and avoid deviations in measurement results.

[0004] Therefore, in addition to the test tube rotating device, existing sample feeding devices also include a sample rack fixing device and a test tube straightening device. The sample rack fixing device is used to limit the position of the test tube rack to reduce its movement in the conveying direction. The test tube straightening device is used to straighten the test tube to ensure that the test tube is in the correct position when scanning the sample barcode and aspirating the sample.

[0005] However, the test tube rotating device, the sample rack fixing device and the test tube righting device are implemented using different modules, which results in a corresponding increase in the volume and cost of the entire device, and is not conducive to miniaturization of the overall size of the medical device. Summary of the Invention

[0006] The present application provides a test tube rotating device, a sample injection device, and a sample analyzer using the test tube rotating device, to reduce the overall size of the device. The present application also provides a test tube rack limiting assembly, a test tube rotating device, a sample injection device, and a sample analyzer using the test tube rack limiting assembly, for limiting the position of the test tube rack and reducing shaking of the test tube rack in its conveying direction when rotating the test tube.

[0007] In one embodiment of the present application, a test tube rotating device for medical equipment is provided, comprising:

[0008] a rotating assembly comprising a rotating member for driving a corresponding test tube to rotate, a first driving unit for driving the rotating member to rotate, and a second driving unit for generating relative motion between the rotating member and the test tube;

[0009] a test tube rack limiting assembly comprising a limiting member capable of limiting movement of the test tube rack in its conveying direction when the test tube is rotated, and a third driving unit for generating relative movement between the limiting member and the test tube rack;

[0010] and a test tube righting assembly comprising a righting member capable of supporting the test tube and a fourth driving unit for generating relative motion between the righting member and the test tube;

[0011] Wherein, at least two of the second driving unit, the third driving unit and the fourth driving unit are the same driving unit.

[0012] In one embodiment, a mounting seat is further included, and the rotating assembly also includes a connecting arm and a pressure member for pushing the test tube toward the rotating member, the pressure member is installed on the connecting arm, and the connecting arm is installed on the mounting seat, the pressure member and the rotating member are arranged opposite to each other, and a gap is left between the two for the test tube rack and the test tube to pass through, the connecting arm is transmission-connected to the second drive unit, and the second drive unit is used to drive the connecting arm and the pressure member to move toward the rotating member to push the test tube to move toward the rotating member.

[0013] In one embodiment, the second drive unit and the third drive unit are the same first motor, the first motor is connected to the connecting arm via a first transmission mechanism, the first motor is connected to the limiting member, the limiting member and the rotating member are located on the same side, and the pressing member is arranged on the opposite side of the limiting member and the rotating member. Under the drive of the first motor, the limiting member and the pressing member move in opposite directions.

[0014] In one embodiment, the first transmission mechanism is a first synchronous belt mechanism, the first motor is connected to the driving wheel of the first synchronous belt mechanism, the connecting arm is installed on the synchronous belt of the first synchronous belt mechanism, and reciprocates with the synchronous belt of the first synchronous belt mechanism.

[0015] In one embodiment, a second synchronous belt mechanism is further included, the connecting arm has a first branch arm, the first branch arm is connected to the synchronous belt of the second synchronous belt mechanism, the synchronous belt of the second synchronous belt mechanism moves with the connecting arm, the limiting member is installed on the synchronous belt of the second synchronous belt mechanism, and the limiting member and the first branch arm are respectively connected to two opposite parts of the synchronous belt of the second synchronous belt mechanism, so that the movement of the limiting member is opposite to the movement of the connecting arm.

[0016] In one embodiment, there are at least two pressing members, which are arranged side by side on the connecting arm, with gaps between adjacent pressing members.

[0017] In one embodiment, the pressing member is a roller, the surface of the roller for contacting the test tube is made of a flexible material, and the roller is rotatably mounted on the connecting arm.

[0018] In one embodiment, the first driving unit is a second motor, which is mounted on a mounting base and connected to the rotating member via a gear transmission set.

[0019] In one embodiment, the limiting member is movably provided on the mounting seat, one end of the limiting member is a limiting portion, the limiting member is transmission-connected to a third driving unit, and the third driving unit drives the limiting member to move relative to the test tube rack, so that the limiting portion is inserted into or pressed against the test tube rack, thereby limiting the movement of the test tube rack in its transmission direction.

[0020] In one embodiment, the movement direction of the limiting portion is arranged to form an angle with the conveying direction of the test tube rack, and the value a of the angle is: 45°≤a≤135°.

[0021] In one embodiment, the limiting portion is arranged corresponding to a side wall of the test tube rack.

[0022] In one embodiment, the test tube rack limiting assembly has a first resetting elastic member, and the first resetting elastic member is used to drive the limiting member to reset in a direction away from the test tube rack.

[0023] In one embodiment, the limiting member is slidably disposed on the mounting seat, and the first resetting elastic member is sleeved on the limiting member.

[0024] In one embodiment, the test tube righting assembly includes a base, the righting member is movably mounted on the base, and the fourth driving unit drives the righting member to move toward the test tube.

[0025] In one embodiment, the fourth driving unit and the second driving unit use the same first motor, the straightening member and the pressure member are located on the same side, the rotating member is arranged on the opposite side of the straightening member and the pressure member, and the connecting arm is movably connected to the straightening member. When the connecting arm moves toward the side of the rotating member, it drives the straightening member to move toward the side of the rotating member, so that the straightening member can press against the corresponding test tube.

[0026] In one embodiment, the straightening member is rotatably mounted on the base, and a rotation axis of the straightening member relative to the base is consistent with a conveying direction of the test tube rack.

[0027] In one embodiment, the straightening member has a shift rod, the connecting arm has a second support arm, the second support arm is located at one end where the connecting arm is connected to the pressure member, the second support arm has a connecting port, the shift rod extends into the connecting port, so that the connecting arm can drive the straightening member to move toward the side where the rotating member is located.

[0028] In one embodiment, the straightening member includes a connecting block, a second elastic reset member and a pressing block, the connecting block is rotatably mounted on the base, the second elastic reset member is mounted on the connecting block, and the pressing block is mounted on the second elastic reset member; the pressing block has a recessed portion on a side facing the test tube for fitting the outer wall of the test tube.

[0029] In one embodiment of the present application, a sampling device of a medical device is provided, comprising a sampling channel and a test tube rotating device as described in any one of the above items, wherein the rotating part, the limiting part and the straightening part of the test tube rotating device are arranged toward the sampling channel to rotate the test tube in the sampling channel.

[0030] In one embodiment of the present application, a sample analyzer is provided, comprising an injection channel and a test tube rotating device as described in any one of the above items, wherein a rotating member, a limiting member and a straightening member of the test tube rotating device are arranged toward the injection channel to rotate the test tube in the injection channel.

[0031] In one embodiment, it also includes a loading area for placing samples to be tested and an unloading area for unloading tested samples. The injection channel is located between the loading area and the unloading area. The samples to be tested are transferred from the loading area to the injection channel, and the tested samples are transferred from the injection channel to the unloading area.

[0032] In one embodiment of the present application, a test tube rack limiting assembly of a sampling device is provided, comprising:

[0033] A limiter mounting seat, which is used to provide support;

[0034] A limiting member, the limiting member is movably mounted on the limiting member mounting seat, one end of the limiting member is a limiting portion, and the limiting portion is arranged corresponding to the side wall of the test tube rack;

[0035] and a driving unit, wherein the limiting member is in transmission connection with the driving unit, and the driving unit drives the limiting member to move relative to the test tube rack, so that the limiting portion is inserted into or pressed against the test tube rack.

[0036] In one embodiment, the movement direction of the limiting portion is arranged to form an angle with the conveying direction of the test tube rack, and the value a of the angle is: 45°≤a≤135°.

[0037] In one embodiment, the test tube rack limiting assembly has a first resetting elastic member, and the first resetting elastic member is used to drive the limiting member to reset in a direction away from the test tube rack.

[0038] In one embodiment, the limiting member is slidably arranged on the limiting member mounting seat, and the first reset elastic member is sleeved on the limiting member.

[0039] In one embodiment, the end where the limiting portion is located is the front end of the limiting member, and the end opposite to the front end is the rear end, the front end of the limiting member passes through the limiting member mounting seat and extends out of the limiting member mounting seat, the rear end of the limiting member is located on the other side of the limiting member mounting seat, and the first reset elastic member is installed between the rear end of the limiting member and the limiting member mounting seat.

[0040] In one embodiment, the driving unit is a first motor, and the first motor is transmission-connected to the limiting member.

[0041] In one embodiment of the present application, a test tube rotating device of a sampling device is provided, comprising:

[0042] a rotating assembly for rotating the test tube;

[0043] And a test tube rack limiting assembly as described in any of the above items.

[0044] In one embodiment, the rotating assembly includes a rotating member, a connecting arm and a pressure member for pushing the test tube toward the rotating member, the pressure member is mounted on the connecting arm, the connecting arm is mounted on the limit member mounting seat, the pressure member and the rotating member are arranged opposite to each other, and a gap is left between the two for the test tube rack and the test tube to pass through; the driving unit is a first motor, which is transmission-connected to the connecting arm via a first transmission mechanism, and the first motor drives the connecting arm and the pressure member toward the rotating member to push the test tube toward the rotating member; the first motor is transmission-connected to the limit member, the limit member and the rotating member are located on the same side, and the pressure member is arranged on the opposite side of the limit member and the rotating member, and under the drive of the first motor, the limit member and the pressure member move in opposite directions.

[0045] In one embodiment, the first transmission mechanism is a first synchronous belt mechanism, the first motor is connected to the driving wheel of the first synchronous belt mechanism, the connecting arm is installed on the synchronous belt of the first synchronous belt mechanism, and reciprocates with the synchronous belt of the first synchronous belt mechanism; it also includes a second synchronous belt mechanism, the connecting arm has a first support arm, the first support arm is connected to the synchronous belt of the second synchronous belt mechanism, the synchronous belt of the second synchronous belt mechanism moves with the connecting arm, the limiting member is installed on the synchronous belt of the second synchronous belt mechanism, and the limiting member and the first support arm are respectively connected to two opposite parts of the synchronous belt of the second synchronous belt mechanism, so that the movement of the limiting member is opposite to the movement of the connecting arm.

[0046] In one embodiment of the present application, a sampling device of a medical device is provided, comprising a sampling channel and a test tube rack limiting assembly as described above, wherein a limiting member of the test tube rack limiting assembly is arranged toward the sampling channel to limit the test tube in the sampling channel.

[0047] In one embodiment of the present application, a sample analyzer is provided, comprising an injection channel and a test tube rack limiting assembly as described above, wherein a limiting member of the test tube rack limiting assembly is arranged toward the injection channel to limit the test tube in the injection channel.

[0048] According to the above-described embodiment, the test tube rotating device includes a rotating assembly, a test tube rack limiting assembly, and a test tube righting assembly. The rotating assembly is used to rotate the test tube and includes a second drive unit for generating relative motion between the rotating member and the test tube. The test tube rack limiting assembly is used to limit movement of the test tube rack in its conveying direction during test tube rotation and includes a third drive unit for generating relative motion between the limiting member and the test tube rack. The test tube righting assembly is used to right the test tube and includes a fourth drive unit for generating relative motion between the righting member and the test tube. At least two of the second, third, and fourth drive units may be the same drive unit, or all may be driven by a single drive unit, simplifying the structure. Furthermore, integrating at least two of the rotating assembly, the test tube rack limiting assembly, and the test tube righting assembly into a power system makes the overall structure more compact, thereby reducing the size of the sample injection device and sample analyzer using this test tube rotating device.

[0049] The test tube rack limit assembly according to the above-described embodiment includes a limiter mounting base, a limiter, and a drive unit. The limiter is movably mounted on the limiter mounting base, and one end of the limiter is a limiter portion, which is disposed corresponding to a side wall of the test tube rack. The limiter is in transmission connection with the drive unit, which drives the limiter to move relative to the test tube rack, causing the limiter portion to insert into or abut against the test tube rack, thereby limiting the test tube rack in its conveying direction and restricting the test tube rack from moving in the conveying direction when the test tube is rotated. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic structural diagram of a test tube rotating device in one embodiment of the present application;

[0051] Figure 2 This is a side view of a test tube rotating device in one embodiment of the present application;

[0052] Figure 3 and 4 This is a schematic structural diagram of a test tube rotating device according to an embodiment of the present application after omitting the test tube righting assembly from different perspectives;

[0053] Figure 5 This is a schematic structural diagram of a test tube rotating device and a test tube rack when the test tube rotating device is installed in a sample injection device or a sample analyzer in one embodiment of the present application, wherein the test tube rotating device is cut along a vertical plane at the position of the limiter;

[0054] Figure 6 This is a schematic diagram of a driving structure of a rotating member in one embodiment of the present application;

[0055] Figure 7 This is a schematic structural diagram of a test tube righting assembly in one embodiment of the present application;

[0056] Figure 8 This is a side view of a test tube righting assembly in one embodiment of the present application;

[0057] Figure 9 This is a schematic structural diagram of a test tube righting assembly in one embodiment of the present application when righting a test tube;

[0058] Figure 10 This is a schematic diagram of the layout of each area of ​​a sample analyzer in one embodiment of the present application;

[0059] Figure 11 This is a structural diagram of a sample analyzer in one embodiment of the present application, wherein the test tube rotating device is cut along a vertical plane at the position of the limiter;

[0060] Figure 12 This is a structural diagram of a sample analyzer from another perspective in an embodiment of the present application. DETAILED DESCRIPTION

[0061] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0062] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0063] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0064] This embodiment provides a test tube rotating device for medical equipment, which includes but is not limited to a sample feeding device for sample feeding, various sample analyzers, etc. The test tube rotating device is used to rotate the test tube under certain requirements, such as rotating the test tube when the test tube barcode is rotated and scanned, etc. In addition to satisfying the function of rotating the test tube, the test tube rotating device can also limit the test tube rack in its transmission direction, especially limit the test tube rack when rotating the test tube, to avoid changes in the position of other test tubes due to the offset and shaking of the test tube rack. At the same time, the test tube rotating device can also straighten the test tube that needs to be straightened, such as straightening the test tube when scanning the sample barcode and aspirating the sample, so that the test tube can be accurately positioned to avoid deviations in the measurement results.

[0065] Specifically, please refer to Figures 1 to 6 In one embodiment, the test tube rotating device includes a rotating assembly 100 , a test tube rack limiting assembly 200 , and a test tube righting assembly 300 .

[0066] The rotation assembly 100 includes a rotating member 110 for driving the corresponding test tube 510 to rotate, a first drive unit 120 for driving the rotating member 110 to rotate, and a second drive unit 130 for generating relative motion between the rotating member 110 and the test tube 510. The rotation assembly 100 drives the test tube 510 to rotate by pressing the rotating member 110 against the test tube 510. The first drive unit 120 drives the rotating member 110 to rotate. The first drive unit 120 can most commonly use a rotary motor as a power source. Of course, in other embodiments, other structures capable of achieving rotational motion output can also be used. For example, a linear motion power source such as an air cylinder, an oil cylinder, or a linear motor can be used in conjunction with a transmission mechanism that can convert linear motion into rotational motion, such as a crank slider mechanism or a lead screw nut mechanism.

[0067] The rotating member 110 and the test tube 510 generate relative motion. When the two are in contact with each other, the rotation of the rotating member 110 drives the test tube 510 to rotate. When the two are separated, the test tube 510 is not affected by the rotating member 110. The relative motion between the rotating member 110 and the test tube 510 can be generated by the second driving unit 130 driving the rotating member 110 to move relative to the test tube 510, or the second driving unit 130 driving the test tube 510 to move relative to the rotating member 110. For example, in one embodiment, the second driving unit 130 directly drives the rotating member 110 or the rotating member 110 and the first driving unit 120 as a whole toward and away from the direction of the test tube 510. In another embodiment, the second driving unit 130 controls the movement of an output member (e.g., the pressing member 150 described below) to drive the test tube 510 toward the rotating member 110, thereby achieving the approach and separation of the test tube 510 and the rotating member 110.

[0068] The test tube rack limiting assembly 200 includes a limiting member 210 capable of limiting movement of the test tube rack 500 in its conveying direction when the test tube 510 is rotated, and a third driving unit 220 for generating relative motion between the limiting member 210 and the test tube rack 500. When the limiting member 210 and the test tube rack 500 approach each other to a certain extent, such as when the limiting member 210 presses the test tube rack 500, when the limiting member 210 is inserted into the test tube rack 500, or in other situations, the limiting member 210 limits the test tube rack 500. When the limiting member 210 and the test tube rack 500 move away from each other, the test tube rack 500 is released. The limiting member 210 can prevent the test tube rack 500 from moving in the conveying direction by pressing, adsorption (e.g., magnetic attraction), or forming an obstacle in the conveying direction of the test tube rack 500 (e.g., when the limiting member 210 is inserted into the test tube rack 500). Of course, the test tube rack limit assembly 200 can limit the test tube rack 500 at set times based on actual needs. For example, it can limit the test tube rack 500 during operations such as cap detection, test tube rotation, barcode scanning, and sample aspiration. In particular, it can limit the test tube rack 500 during the rotation of the test tube 510 to prevent the position of other test tubes from changing due to the deviation and shaking of the test tube rack 500. When there is no need for limiting, the limit member 210 can release the test tube rack 500 without affecting its movement.

[0069] The relative motion between the stopper 210 and the test tube rack 500 can be generated by the third drive unit 220 driving the stopper 210 to move relative to the test tube rack 500, or by the third drive unit 220 driving the test tube rack 500 to move relative to the stopper 210. For example, in one embodiment, the third drive unit 220 drives the stopper 210 toward and away from the test tube rack 500. In another embodiment, the third drive unit 220 controls the movement of an output member, thereby driving the test tube rack 500 toward and away from the stopper 210. In certain embodiments, the movement of the test tube rack 500 can be synchronized with the movement of the test tube 510 in the rotating assembly 100. For example, when the test tube rack 500 moves toward the stopper 210, the test tube 510 on the test tube rack 500 also moves toward the corresponding rotating member 110.

[0070] The test tube righting assembly 300 includes a righting member 310 capable of supporting the test tube 510 and a fourth drive unit 320 for generating relative motion between the righting member 310 and the test tube 510. The righting member 310 supports the test tube 510, maintaining it in a set position on the test tube rack 500. This ensures that the test tube 510 is positioned as required during operations on the test tube 510. For example, during scanning, the barcode on the test tube 510 is positioned within the scannable area of ​​the scanner, or the center of the test tube 510 is aligned with the aspiration needle during sample aspiration to prevent misalignment.

[0071] The relative motion between the centralizing member 310 and the test tube 510 can be generated by the fourth drive unit 320 driving the centralizing member 310 to move relative to the test tube 510, or by the fourth drive unit 320 driving the test tube 510 to move relative to the centralizing member 310. For example, in one embodiment, the fourth drive unit 320 drives the centralizing member 310 toward and away from the test tube 510. In another embodiment, the fourth drive unit 320 controls the movement of an output member, thereby driving the test tube 510 or the entire test tube rack 500 toward the centralizing member 310, thereby achieving movement of the centralizing member 310 toward and away from the test tube 510.

[0072] In this embodiment, at least two of the second drive unit 130, the third drive unit 220, and the fourth drive unit 320 are the same drive unit, thereby reducing the number of drive units and simplifying the structure of the entire device. Taking the motor as an example, if at least two of the second drive unit 130, the third drive unit 220, and the fourth drive unit 320 are controlled by the same motor, at least one motor can be omitted, thereby freeing up more space to accommodate other structures, making the entire device more compact. Moreover, omitting the drive unit can further reduce costs. At the same time, integrating at least two of the rotating assembly 100, the test tube rack limiting assembly 200, and the test tube straightening assembly 300 into a power system can make the overall structure more compact, making the entire device of the sample injection device and sample analyzer using this test tube rotating device smaller in size.

[0073] Preferably, in one embodiment, the second drive unit 130, the third drive unit 220, and the fourth drive unit 320 are all the same drive unit. This allows a single drive unit to simultaneously control rotation, position limiting, and righting operations. This frees up more space for other components, resulting in a more compact and cost-effective device.

[0074] The second drive unit 130, the third drive unit 220, and the fourth drive unit 320 may be powered by, but are not limited to, rotary motors, linear motors, pneumatic cylinders, or hydraulic cylinders. These drive units can control the rotation assembly 100, the test tube rack limiting assembly 200, and the test tube straightening assembly 300 through various transmission mechanisms or combinations thereof. These transmission mechanisms include, but are not limited to, gear transmission mechanisms, synchronous belt transmission mechanisms, synchronous chain transmission mechanisms, crank slider mechanisms, and lead screw and nut mechanisms.

[0075] For further information, please refer to Figures 1 to 5In one embodiment, the test tube rotating device includes a mounting base 400, and the rotating assembly 100 further includes a connecting arm 140 and a pressing member 150 for pushing the test tube 510 toward the rotating member 110. The pressing member 150 is mounted on the connecting arm 140, and the connecting arm 140 is movably mounted on the mounting base 400, such as by sliding connection. The pressing member 150 is disposed opposite to the rotating member 110, and a gap is left between the two for the test tube rack 500 and the test tube 510 to pass through, such as Figure 5 As shown, the transfer channel of the test tube rack 500 is located below the gap, and the test tube rack 500 will pass through the gap. The connecting arm 140 is in transmission connection with the second driving unit 130, and the second driving unit 130 is used to drive the connecting arm 140 and the pressing member 150 toward the rotating member 110 to push the test tube 510 toward the rotating member 110.

[0076] In this embodiment, a pressing member 150 is used to drive the test tube 510 to press against the rotating member 110. For ease of description, the side of the test tube rack 500 where the pressing member 150 is located is defined as the front side, and the side where the rotating member 110 is located is defined as the rear side. The second drive unit 130 drives the connecting arm 140 from the front side toward the rear side, which in turn drives the pressing member 150 toward the rear side. When the test tube 510 is released, the connecting arm 140 and the pressing member 150 move in opposite directions.

[0077] Please continue to refer to Figure 1-5 In one embodiment, the second drive unit 130 and the third drive unit 220 are the same first motor (in this embodiment, the first motor is a rotary motor). The first motor is connected to the connecting arm 140 via a first transmission mechanism. Simultaneously, the first motor is connected to the stopper 210. The stopper 210 and the rotary member 110 are located on the same side, that is, both are located at the rear side of the test tube rack 500. The pressure member 150 is located on opposite sides of the stopper 210 and the rotary member 110. Driven by the first motor, the stopper 210 and the pressure member 150 move in opposite directions. That is, when the first motor drives the pressure member 150 to move from the front to the rear of the test tube rack 500, it simultaneously drives the stopper 210 to move from the rear to the front of the test tube rack 500, thereby forming relative motion with the test tube rack 500. When the test tube rack 500 is released, the stopper 210 moves in the opposite direction.

[0078] Of course, in other embodiments, the limiting member 210 and the pressing member 150 may be arranged on the same side, for example, both arranged on the front side of the test tube rack 500. In this case, the first motor drives the limiting member 210 and the pressing member 150 to move in the same direction. In this embodiment, the first motor may be arranged on the front side of the test tube rack 500, that is, on the same side as the limiting member 210 and the pressing member 150, thereby simultaneously driving the limiting member 210 and the pressing member 150 to move from the front side to the rear side; alternatively, the limiting member 210 and the first motor may be connected via a connecting arm 140, similar to the connection method of the pressing member 150, so that the first motor simultaneously drives the limiting member 210 and the pressing member 150 to move from the front side to the rear side.

[0079] In the above embodiment, the first motor drives the limiting member 210 and the pressing member 150 to move simultaneously. By designing the stroke, when the pressing member 150 pushes the test tube 510 to the position where the pressing rotating member 110 is pressed, the limiting member 210 just forms a limit on the test tube rack 500, thereby ensuring that during the process of rotating the test tube 510, the test tube rack 500 can be deflected as little as possible in its conveying direction.

[0080] For further information, please refer to Figure 1-5 In one embodiment, the first transmission mechanism is disposed on the mounting base 400. The first transmission mechanism is a first synchronous belt mechanism 160, the first motor is connected to the driving wheel of the first synchronous belt mechanism 160, and the connecting arm 140 is mounted on the synchronous belt 161 of the first synchronous belt mechanism 160 and reciprocates with the synchronous belt 161 of the first synchronous belt mechanism 160. Of course, in other embodiments, the first transmission mechanism may also adopt other structures, such as but not limited to a gear transmission mechanism, a synchronous belt transmission mechanism, a synchronous chain transmission mechanism, a crank slider mechanism, a screw nut mechanism, etc. As for the connection between the first motor and the limit member 210, it can also be achieved through various transmission mechanisms, such as but not limited to a gear transmission mechanism, a synchronous belt transmission mechanism, a synchronous chain transmission mechanism, a crank slider mechanism, a screw nut mechanism, etc.

[0081] Specifically, please refer to Figure 3 In one embodiment, the rotation axes of the driving wheel and the driven wheel in the first synchronous belt mechanism 160 are arranged in the vertical direction. The first motor is connected to the driving wheel of the first synchronous belt mechanism 160, and when the driving wheel rotates, it drives the synchronous belt 161 to move. The connecting arm 140 is fixedly mounted on the synchronous belt 161. When one side of the synchronous belt 161 moves horizontally, it can drive the connecting arm 140 to move horizontally. The first motor is a forward and reverse motor. Its rotation in different directions will drive the synchronous belt 161 and the connecting arm 140 thereon to reciprocate in the horizontal direction.

[0082] Please continue to refer to Figure 1-5In order to achieve the movement of the limiting member 210 and the pressing member 150 in opposite directions, in one embodiment, a second synchronous belt mechanism 230 is further included. The connecting arm 140 has a first arm 141, and the first arm 141 is connected to the synchronous belt 231 of the second synchronous belt mechanism 230. The synchronous belt 231 of the second synchronous belt mechanism 230 moves with the connecting arm 140, and the limiting member 210 is installed on the synchronous belt 231 of the second synchronous belt mechanism 230. Figure 2 As shown, the limiting member 210 and the first arm 141 are respectively connected to two opposite parts of the synchronous belt 231 of the second synchronous belt mechanism 230 . When the synchronous belt 231 moves, the movement of the limiting member 210 is opposite to the movement of the connecting arm 140 .

[0083] The second synchronous belt mechanism 230 is also provided on the mounting base 400. Figure 4 and 5 In one embodiment, the driving wheel and the driven wheel of the second synchronous belt mechanism 230 are rotatably mounted on the mounting seat 400, the upper or lower portion of the synchronous belt 231 of the second synchronous belt mechanism 230 is connected to the first arm 141 of the connecting arm 140, and the limiting member 210 is connected to the lower or upper portion of the synchronous belt 231 opposite to the first arm 141, so that when the first arm 141 drives the synchronous belt 231 to move, the movement of the limiting member 210 and the first arm 141 is exactly opposite.

[0084] In this embodiment, the rotation axes of the driving wheel and the driven wheel of the second synchronous belt mechanism 230 are arranged in a horizontal direction. The limiting member 210 can be fixed to the synchronous belt 231 through one or more adapter blocks 250.

[0085] For further information, please refer to Figures 2 to 5 In one embodiment, the limiting member 210 is movably provided on the mounting base 400. One end of the limiting member 210 is a limiting portion 211. The limiting member 210 is transmission-connected to a third driving unit 220 (e.g., a first motor or other independent driving unit). The third driving unit 220 drives the limiting member 210 to move relative to the test tube rack 500, so that the limiting portion 211 is inserted into or pressed against the test tube rack 500 (as shown in the figure, the limiting portion 211 is inserted into the pore of the test tube rack 500), thereby limiting the movement of the test tube rack 500 in its conveying direction.

[0086] In one embodiment, the movement direction of the limiter 211 is set at an angle to the conveying direction of the test tube rack 500, and the value of the angle a is: 45°≤a≤135°. Figure 5 As shown, the movement direction of the limiting member 210 is 90 degrees to the conveying direction of the test tube rack 500. The limiting member 211 presses or inserts the test tube rack 500 at this angle, which can better prevent the test tube rack 500 from moving in its conveying direction.

[0087] Preferably, in one embodiment, please refer to Figure 5 The limiting portion 211 is provided corresponding to the side wall of the test tube rack 500. Limiting from the side wall of the test tube rack 500 makes it easier to integrate the rotating assembly 100 and the test tube rack limiting assembly 200 on a mounting base 400 without occupying space at other positions, thereby avoiding affecting other components.

[0088] Further, in order to facilitate the reset of the limiter 210, please refer to Figure 2 and 5 In one embodiment, the test tube rack limit assembly 200 includes a first resetting elastic member 240, which is used to drive the limit member 210 to reset in a direction away from the test tube rack 500. The first resetting elastic member 240 can be a spring, a spring, or other elastic member. There can be at least one first resetting elastic member 240. When the limit member 210 moves toward the test tube rack 500, the first resetting elastic member 240 is compressed or stretched, causing the first resetting elastic member 240 to deform. When the limit member 210 moves away from the test tube rack 500, the elastic restoring force of the first resetting elastic member 240 promotes the reset of the limit member 210.

[0089] For further information, please refer to Figure 5 , Figure 5 The figure cuts through the mounting base 400, the limiting member 210, and other related components along a vertical plane passing through the centerline of the limiting member 210 to illustrate the structure of the limiting member 210 and the mounting base 400. The limiting member 210 is slidably mounted on the mounting base 400, and the first resilient member 240 is sleeved on the limiting member 210. In other embodiments, the first resilient member 240 can also be arranged side by side with the limiting member 210 or connected in other ways.

[0090] The first resetting elastic member 240 can be directly mounted on the limiting member 210, for example, Figure 5 As shown, the end where the limiting portion 211 is located is the front end of the limiting member 210, and the end opposite to the front end is the rear end. The front end of the limiting member 210 passes through the mounting seat 400 and extends outside the mounting seat 400. The rear end of the limiting member 210 is located on the other side of the mounting seat 400. The first return elastic member 240 is installed between the rear end of the limiting member 210 and the mounting seat 400. A connecting seat 212 can be provided at the rear end of the limiting member 210, and the first return elastic member 240 is installed between the connecting seat 212 and the mounting seat 400. The connecting seat 212 can be fixedly connected to the adapter block 250, or the two can be an integral structure.

[0091] For further information, please refer to Figure 2 and 5In one embodiment, the limiting member 210 is rod-shaped, wherein the limiting portion 211 is a raised disc-shaped structure, and the disc-shaped structure facilitates the limiting portion 211 to be inserted into the pores of the test tube rack 500.

[0092] For further information, please refer to Figure 5 In one embodiment, the limiting member 210 may be located directly below the rotating member 110. When the rotating member 110 presses the test tube 510, the limiting member 210 may press or insert into the test tube rack 500 to play a limiting role.

[0093] Furthermore, the mounting base 400 is a supporting structure, which may be an integrated component, such as an integrated bracket. It may also be formed by a plurality of brackets fixedly connected. For example, Figure 1-5 In the illustrated structure, the mounting base 400 comprises a plurality of separately manufactured sheet metal brackets that are fixedly connected together to form the entire mounting base 400. The mounting base 400 may be used solely to support the rotating assembly 100, or it may also be used to support the test tube rack limiting assembly 200 and / or the test tube righting assembly 300. The first motor, first transmission mechanism, second timing belt mechanism 230, connecting arm 140, and limiting member 210 are all mounted on the mounting base 400. The mounting base 400 is intended for installation in other medical devices, such as sample injection devices and sample analyzers.

[0094] In one embodiment, at least two of the rotation assembly 100, the test tube rack stop assembly 200, and the test tube righting assembly 300 are integrated on a single mounting base 400, making the test tube rotation device more compact. Integrating the rotation assembly 100 and the test tube rack stop assembly 200 on a single mounting base 400, as in the above embodiment, saves space and achieves a more compact structure.

[0095] Of course, in other embodiments, an independent mounting seat may be provided for each component, for example, the rotating assembly 100 , the test tube rack limiting assembly 200 and the test tube righting assembly 300 may be provided on three separate mounting seats.

[0096] Furthermore, the mounting base 400 is located at the rear side of the test tube rack 500, and the connecting arm 140 can be a plate-shaped structure or a structure of other shapes, which is suspended from the mounting base 400 to the front side of the test tube rack 500. The pressing member 150 is provided at the portion of the connecting arm 140 located at the rear end of the test tube rack 500. The pressing member 150 can be flush with the rotating member 110 or have a height difference.

[0097] For further information, please refer to Figure 3 and 6In one embodiment, the first driving unit 120 is a second motor, which is mounted on the mounting base 400 and connected to the rotating member 110 via a gear transmission group 121. Preferably, the second motor is mounted near the middle of the mounting base 400. The rotating member 110 can be a rotating wheel. The second motor is a rotary motor, which drives the gear transmission group 121 to rotate. A gear in the gear transmission group 121 is coaxially fixed to the rotating member 110, thereby driving the rotating member 110 to rotate. The outer wall of the rotating member 110 slightly protrudes from the mounting base 400 so that the mounting base 400 does not hinder the outer wall of the rotating member 110 from contacting the test tube 510.

[0098] For further information, please refer to Figure 4 and 9 In one embodiment, there are at least two pressing members 150, which are arranged side by side on the connecting arm 140, with a gap between adjacent pressing members 150. When the pressing members 150 push the test tube 510 to move, the gap can limit part of the outer wall of the test tube 510, thereby preventing the test tube 510 from sliding off the sides of the pressing members 150 when the test tube 510 is pushed.

[0099] In order to make the pressing member 150 push the test tube 510 more smoothly, please refer to Figure 4 and 5 In one embodiment, the pressing member 150 is a roller rotatably mounted on the connecting arm 140. The roller can rotate according to the force applied when pushing the test tube 510 to adjust the position. The surface of the roller that contacts the test tube 510 is made of a flexible material to prevent impact with the test tube 510 and damage to the test tube 510. Figure 4 and 5 The rotation axis of the roller is shown to be vertically arranged. In other embodiments, the rotation axis of the roller may also be inclined at a certain angle.

[0100] For further information, please refer to Figure 1 、 7 9. In one embodiment, the test tube straightening assembly 300 includes a base 330, and the straightening member 310 is movably mounted on the base 330. The fourth driving unit 320 (such as the first motor or other independent driving unit) drives the straightening member 310 to move toward the test tube 510. The base 330 can be fixedly connected to the mounting base 400, or can be fixedly connected to the mounting base 400. Figure 1 、 7 As shown in FIG9 , the base 330 and the mounting seat 400 are separately arranged in different places.

[0101] In a preferred embodiment, the fourth drive unit 320 and the second drive unit 130 utilize the same first motor. Thus, the rotation assembly 100, the test tube rack limiting assembly 200, and the test tube straightening assembly 300 are all driven by the same drive unit, further reducing the number of drive units and making the device smaller and more compact.

[0102] In other embodiments, the fourth drive unit 320 and the third drive unit 230 may also use the same drive unit, for example, using a connecting arm structure, so that the test tube rack limiting assembly 200 and the test tube righting assembly 300 are connected to the same first motor, and the rotating assembly 100 can be set separately, that is, the rotating assembly 100 is not controlled by the first motor.

[0103] Please refer to Figure 1 、 7 In one embodiment, the straightening member 310 and the pressing member 150 are located on the same side, and the rotating member 110 is disposed on opposite sides of the straightening member 310 and the pressing member 150. The connecting arm 140 is movably connected to the straightening member 310. When the connecting arm 140 moves toward the rotating member 110, the straightening member 310 is moved toward the rotating member 110, thereby enabling the straightening member 310 to contact the corresponding test tube 510.

[0104] In some embodiments, the first motor and the straightening member 310 may be disposed on the same side. For example, the first motor may also be disposed on the front side of the test tube rack 500. This allows the connection arm 140 to be omitted or the connection arm 140 to be made excessively long to span the test tube rack 500. Furthermore, the limiting member 210 may also be disposed on the front side of the test tube rack 500 to limit the test tube rack 500 from the front side.

[0105] For further information, please refer to Figure 1 、 7 In one embodiment, the uprighting member 310 is rotatably mounted on the base 330, and the rotation axis of the uprighting member 310 relative to the base 330 is consistent with the conveying direction of the test tube rack 500. Figure 1 and 9 As shown, when the rotation axis of the straightening member 310 is aligned with the transport direction of the test tube rack 500, the straightening member 310 can easily move to the position of the test tube 510 during the rotation process. Of course, the rotation axis of the straightening member 310 relative to the base 330 can also be set to other directions as long as the straightening member 310 can push the test tube 510 back to the correct position during the movement.

[0106] Please refer to Figure 1 、 3, 7 to 9, in one embodiment, as an example of a movably connected connecting arm 140 and the straightening member 310, the straightening member 310 has a lever 360, and the connecting arm 140 has a second arm 142. The second arm 142 is located at the end where the connecting arm 140 is connected to the pressing member 150. The second arm 142 has a connecting port 1421, and the lever 360 extends into the connecting port 1421, so that the connecting arm 140 can drive the straightening member 310 to move toward the side where the rotating member 110 is located. Preferably, the opening directions of the lever 360 and the connecting port 1421 are both arranged along the conveying direction of the test tube rack 500, so that the second arm 142 can easily drive the straightening member 310 to rotate. In addition, the connecting arm 140 can also be movably connected to the straightening member 310 in other ways, and is not limited to the above structure.

[0107] Further, in a more specific embodiment, please refer to Figures 7 to 9 The straightening member 310 includes a connecting block 340 , a second elastic reset member 350 and a pressing block 370 . The connecting block 340 is rotatably mounted on the base 330 , the second elastic reset member 350 is mounted on the connecting block 340 , and the pressing block 370 is mounted on the second elastic reset member 350 .

[0108] To better straighten the test tube 510, please refer to Figure 9 In one embodiment, the pressing block 370 has a recessed portion 371 on a side facing the test tube 510 , which is used to fit the outer wall of the test tube 510 to prevent the test tube 510 from sliding off the pressing block 370 .

[0109] The test tube rotation device provided in this embodiment enables the structures of the rotation assembly 100, the test tube rack limiting assembly 200, and the test tube righting assembly 300 to be linked. Using one or two drive units, the rotation assembly 100 simultaneously rotates test tube A while the test tube rack limiting assembly 200 secures the test tube rack 500 containing test tube A to prevent shaking. Simultaneously, the test tube righting assembly 300 compresses and rights test tube B, supporting the aspiration needle for sample aspiration. The entire assembly is compact, enabling a single drive structure to perform three functional actions.

[0110] On the other hand, one embodiment of the present application provides a sample introduction device for a medical device. The sample introduction device is used for sample feeding, for example, to transport a test tube rack 500 and a test tube 510. The sample introduction device includes a sample introduction channel (i.e., a sample rack transport channel) and a test tube rotation device as described in any of the above embodiments. The test tube rack 500 is transported within the sample introduction channel. The rotating member 110, the limiting member 210, and the straightening member 310 of the test tube rotation device are arranged toward the sample introduction channel to rotate the test tube within the sample introduction channel.

[0111] On the other hand, an embodiment of the present application provides a sample analyzer that can detect and analyze samples. Figures 10 to 12 In one embodiment, the sample analyzer includes an injection channel 2000 (i.e., a sample rack transport channel) and a test tube rotating device 1000 as shown in any of the above embodiments. The test tube rack 500 is transported in the injection channel 2000. The rotating member 110, the limiting member 210, and the straightening member 310 of the test tube rotating device 1000 are arranged toward the injection channel 2000 to rotate the test tube in the injection channel 2000.

[0112] Please refer to Figures 10 to 12 In one embodiment, it also includes a loading area 3000 for placing samples to be tested and an unloading area 4000 for unloading tested samples. The injection channel 2000 is located between the loading area 3000 and the unloading area 4000. The samples to be tested are transferred from the loading area 3000 to the injection channel 2000, and the tested samples are transferred from the injection channel 2000 to the unloading area 4000.

[0113] Please refer to Figure 10 In one embodiment, the injection channel 2000 includes an injection channel inlet position 2100, a measurement position 2200, and an injection channel outlet position 2300. The unloading area 4000 has an unloading channel inlet position 4100 and an unloading channel outlet position 4200. The test tube rack 500 loaded with samples enters the injection channel inlet position 2100 from the loading area 3000, then passes through the measurement position 2200, the injection channel outlet position 2300, the unloading channel inlet position 4100, and the unloading channel outlet position 4200 in sequence, and then enters the unloading area 4000 from the unloading channel outlet position 4200. Detection position A, scanning position B, and sample aspiration position C can also be set in the injection channel 2000 to perform detection, scanning, and sample aspiration, respectively.

[0114] In another embodiment of the present application, a test tube rack limiting assembly of a sampling device is provided, which is used to limit the test tube rack 500 in the conveying direction. The test tube rack limiting assembly can not only be used to fix the test tube rack 500 when rotating the test tube rack 500, but can also be used to limit the test tube rack 500 in other scenarios.

[0115] The test tube rack limit assembly 200 includes a limiter mounting base, a limiter, and a drive unit. The limiter mounting base provides support. The limiter is movably mounted on the limiter mounting base. One end of the limiter forms a limiter portion, which is positioned relative to the sidewall of the test tube rack 500. The limiter is in transmission connection with the drive unit, which drives the limiter relative to the test tube rack, causing the limiter portion to insert into or abut against the test tube rack 500.

[0116] The position-limiting member mounting base may adopt the mounting base 400 shown in the various embodiments described above, or an independent position-limiting member mounting base may be designed to support the position-limiting member 210. The position-limiting member 210 and the driving unit may adopt, but are not limited to, the position-limiting member 210 structure and the driving unit (e.g., the first motor) structure shown in the various embodiments described above.

[0117] In another embodiment, the present application provides a test tube rotating device 1000 for a sample injection device. The test tube rotating device 1000 includes a rotating assembly and a test tube rack limiting assembly as described in the above embodiments. The rotating assembly is used to rotate a test tube 510. The rotating assembly can employ, but is not limited to, the rotating assembly 100 described in the various embodiments described above. For example, the rotating assembly can also employ existing test tube rotating structures used in various medical devices.

[0118] In an embodiment of a test tube rotating device, the rotating assembly and the test tube rack limiting assembly can be set independently, or as shown in the above embodiment, they can be driven by the same driving unit to simplify the structure and make the test tube rotating device 1000 smaller and more compact.

[0119] On the other hand, one embodiment also provides an injection device of a medical device, which includes an injection channel 2000 and a test tube rack limiting assembly as shown in any of the above embodiments, and the limiting member of the test tube rack limiting assembly is arranged toward the injection channel 2000 to limit the sample in the injection channel 2000.

[0120] On the other hand, an embodiment further provides a sample analyzer, which includes an injection channel 2000 and a test tube rack limiting assembly as shown in any of the above embodiments, wherein the limiting member of the test tube rack limiting assembly is arranged toward the injection channel 2000 to limit the sample in the injection channel 2000.

[0121] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A test tube rotating device for medical equipment, characterized in that: include: a rotating assembly comprising a rotating member for driving a corresponding test tube to rotate, a first driving unit for driving the rotating member to rotate, and a second driving unit for generating relative motion between the rotating member and the test tube; a test tube rack limiting assembly comprising a limiting member capable of limiting movement of the test tube rack in its conveying direction when the test tube is rotated, and a third driving unit for generating relative movement between the limiting member and the test tube rack; and a test tube righting assembly comprising a righting member capable of supporting the test tube and a fourth drive unit for generating relative motion between the righting member and the test tube, wherein when the rotating member rotates the corresponding test tube, the righting member can right the test tube other than the rotated test tube; Wherein, at least two of the second driving unit, the third driving unit and the fourth driving unit are the same driving unit.

2. The test tube rotating device according to claim 1, wherein It also includes a mounting seat, and the rotating assembly also includes a connecting arm and a pressing member for pushing the test tube toward the rotating member, the pressing member is installed on the connecting arm, and the connecting arm is installed on the mounting seat, the pressing member and the rotating member are arranged opposite to each other, and a gap is left between the two for the test tube rack and the test tube to pass through, the connecting arm is transmission-connected to the second driving unit, and the second driving unit is used to drive the connecting arm and the pressing member to move toward the rotating member to push the test tube to move toward the rotating member.

3. The test tube rotating device according to claim 2, wherein: The second drive unit and the third drive unit are the same first motor, the first motor is connected to the connecting arm via a first transmission mechanism, the first motor is connected to the limiting member, the limiting member and the rotating member are located on the same side, and the pressing member is arranged on the opposite side of the limiting member and the rotating member. Under the drive of the first motor, the limiting member and the pressing member move in opposite directions.

4. The test tube rotating device according to claim 3, wherein: The first transmission mechanism is a first synchronous belt mechanism, the first motor is connected to the driving wheel of the first synchronous belt mechanism, the connecting arm is installed on the synchronous belt of the first synchronous belt mechanism and reciprocates with the synchronous belt of the first synchronous belt mechanism.

5. The test tube rotating device according to claim 4, wherein: It also includes a second synchronous belt mechanism, the connecting arm has a first branch arm, the first branch arm is connected to the synchronous belt of the second synchronous belt mechanism, the synchronous belt of the second synchronous belt mechanism moves with the connecting arm, the limiting member is installed on the synchronous belt of the second synchronous belt mechanism, and the limiting member and the first branch arm are respectively connected to two opposite parts of the synchronous belt of the second synchronous belt mechanism, so that the movement of the limiting member is opposite to the movement of the connecting arm.

6. The test tube rotating device according to claim 2, wherein: There are at least two pressing members, which are arranged side by side on the connecting arm, with gaps between adjacent pressing members.

7. The test tube rotating device according to claim 6, wherein: The pressing member is a roller, the surface of the roller that is in contact with the test tube is made of a flexible material, and the roller is rotatably mounted on the connecting arm.

8. The test tube rotating device according to claim 2, wherein: The first driving unit is a second motor, which is mounted on a mounting base and connected to the rotating member via a gear transmission set.

9. The test tube rotating device according to claim 2, wherein: The limiting member is movably arranged on the mounting seat, one end of the limiting member is a limiting portion, and the limiting member is transmission-connected to a third driving unit. The third driving unit drives the limiting member to move relative to the test tube rack, so that the limiting portion is inserted into or pressed against the test tube rack, thereby limiting the movement of the test tube rack in its conveying direction.

10. The test tube rotating device according to claim 9, wherein: The movement direction of the limiting portion is arranged to form an angle with the conveying direction of the test tube rack, and the value a of the angle is: 45°≤a≤135°.

11. The test tube rotating device according to claim 9, wherein: The limiting portion is arranged corresponding to the side wall of the test tube rack.

12. The test tube rotating device according to claim 9, wherein: The test tube rack limiting assembly has a first resetting elastic member, and the first resetting elastic member is used to drive the limiting member to reset in a direction away from the test tube rack.

13. The test tube rotating device according to claim 12, wherein: The limiting member is slidably arranged on the mounting seat, and the first resetting elastic member is sleeved on the limiting member.

14. The test tube rotating device according to any one of claims 2 to 13, wherein: The test tube righting assembly includes a base, the righting member is movably mounted on the base, and the fourth driving unit drives the righting member to move toward the test tube.

15. The test tube rotating device according to claim 14, wherein: The fourth driving unit and the second driving unit use the same first motor, the straightening member and the pressing member are located on the same side, the rotating member is arranged on the opposite side of the straightening member and the pressing member, and the connecting arm is movably connected to the straightening member. When the connecting arm moves toward the side of the rotating member, the straightening member is driven to move toward the side of the rotating member, so that the straightening member can press against the corresponding test tube.

16. The test tube rotating device according to claim 15, wherein: The straightening member is rotatably mounted on the base, and a rotation axis of the straightening member relative to the base is consistent with a conveying direction of the test tube rack.

17. The test tube rotating device according to claim 15, wherein: The straightening member has a shift rod, the connecting arm has a second support arm, the second support arm is located at one end where the connecting arm is connected to the pressure member, the second support arm has a connecting port, the shift rod extends into the connecting port, so that the connecting arm can drive the straightening member to move toward the side where the rotating member is located.

18. The test tube rotating device according to claim 15, wherein: The straightening member includes a connecting block, a second elastic reset member and a pressing block. The connecting block is rotatably mounted on the base, the second elastic reset member is mounted on the connecting block, and the pressing block is mounted on the second elastic reset member. The pressing block has a recessed portion on a side facing the test tube for fitting the outer wall of the test tube.

19. A sample injection device for medical equipment, characterized in that: It comprises an injection channel and a test tube rotating device as described in any one of claims 1 to 18, wherein the rotating member, the limiting member and the straightening member of the test tube rotating device are arranged toward the injection channel to rotate the test tube in the injection channel.

20. A sample analyzer, characterized in that: It comprises an injection channel and a test tube rotating device as described in any one of claims 1 to 18, wherein the rotating member, the limiting member and the straightening member of the test tube rotating device are arranged toward the injection channel to rotate the test tube in the injection channel.

21. The sample analyzer according to claim 20, wherein: It also includes a loading area for placing samples to be tested and an unloading area for unloading tested samples. The injection channel is located between the loading area and the unloading area. The samples to be tested are transferred from the loading area to the injection channel, and the tested samples are transferred from the injection channel to the unloading area.

22. A test tube rotating device for a sample injection device, characterized in that: include: a rotating assembly for rotating the test tube; and a test tube rack limiting assembly, the test tube rack limiting assembly comprising a limiting member mounting seat for providing support, a limiting member, and a driving unit; the limiting member is movably mounted on the limiting member mounting seat, one end of the limiting member is a limiting portion, and the limiting portion is arranged corresponding to the side wall of the test tube rack; the limiting member is in transmission connection with the driving unit, and the driving unit drives the limiting member to move relative to the test tube rack so that the limiting portion is inserted into or pressed against the test tube rack; The rotating assembly includes a rotating member, a connecting arm and a pressing member for pushing the test tube toward the rotating member, the pressing member being mounted on the connecting arm, the connecting arm being mounted on the limit member mounting seat, the pressing member and the rotating member being arranged opposite to each other, with a gap left between the two for the test tube rack and the test tube to pass through; the driving unit is a first motor, which is transmission-connected to the connecting arm via a first transmission mechanism, and the first motor drives the connecting arm and the pressing member to move toward the rotating member to push the test tube toward the rotating member; the first motor is transmission-connected to the limit member, the limit member and the rotating member are located on the same side, and the pressing member is arranged on the opposite side of the limit member and the rotating member, and under the drive of the first motor, the limit member and the pressing member move in opposite directions.

23. The test tube rotating device according to claim 22, wherein: The first transmission mechanism is a first synchronous belt mechanism, the first motor is connected to the driving wheel of the first synchronous belt mechanism, the connecting arm is installed on the synchronous belt of the first synchronous belt mechanism, and reciprocates with the synchronous belt of the first synchronous belt mechanism; it also includes a second synchronous belt mechanism, the connecting arm has a first support arm, the first support arm is connected to the synchronous belt of the second synchronous belt mechanism, the synchronous belt of the second synchronous belt mechanism moves with the connecting arm, the limiting member is installed on the synchronous belt of the second synchronous belt mechanism, and the limiting member and the first support arm are respectively connected to two opposite parts of the synchronous belt of the second synchronous belt mechanism, so that the movement of the limiting member is opposite to the movement of the connecting arm.

24. The test tube rotating device according to claim 22, wherein: The movement direction of the limiting portion is arranged to form an angle with the conveying direction of the test tube rack, and the value a of the angle is: 45°≤a≤135°.

25. The test tube rotating device according to claim 22, wherein: The test tube rack limiting assembly has a first resetting elastic member, and the first resetting elastic member is used to drive the limiting member to reset in a direction away from the test tube rack.

26. The test tube rotating device according to claim 25, wherein: The limiting member is slidably arranged on the limiting member mounting seat, and the first resetting elastic member is sleeved on the limiting member.

27. The test tube rotating device according to claim 25, wherein: The end where the limiting portion is located is the front end of the limiting member, and the end opposite to the front end is the rear end. The front end of the limiting member passes through the limiting member mounting seat and extends out of the limiting member mounting seat. The rear end of the limiting member is located on the other side of the limiting member mounting seat. The first reset elastic member is installed between the rear end of the limiting member and the limiting member mounting seat.

28. The test tube rotating device according to claim 22, wherein: The driving unit is a first motor, and the first motor is transmission-connected to the limiting member.

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