Sample rack assembly and medical analysis device

Abstract

Provided are a sample rack assembly and a medical analysis device. The sample rack assembly comprises: a sample rack (1), an extension rack (2), and connecting posts (3). The sample rack (1) is provided with a plurality of first insertion holes (101) along a height direction thereof. The extension rack (2) is provided with a plurality of second insertion holes (201) along a height direction thereof, and a bottom plate (202) for sealing bottom portions of the second insertion holes (201). The number and / or size of the second insertion holes (201) differs from the number and / or size of the first insertion holes (101). Each of the connecting posts (3) is connected to the bottom plate (202) at one end, and is detachably connected to a first insertion hole (101) of the sample rack (1) at the other end. The sample rack (1) has a normal state and an extended state. In the normal state, the connecting posts (3) are separated from the sample rack (1), and sample tubes are configured to be inserted via the first insertion holes (101). In the extended state, the connecting posts (3) are connected to the sample rack (1), and sample tubes are configured to be inserted via the second insertion holes (201). The sample rack assembly has strong compatibility and a wide range of applications.

Description

Sample rack components and medical analysis equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 29, 2023, with application number 202311861639.4 and invention name “Sample rack assembly and medical analysis equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of medical device technology, and in particular to a sample rack assembly and a medical analysis device. Background Art

[0004] The sample rack is used to place sample tubes such as reagent tubes and calibration tubes. A fixed number of holes are provided on the sample rack for the sample tubes to be inserted.

[0005] During the calibration phase of medical analysis equipment, at least two calibration tubes are required to measure two absorbances using the instrument. This is known as two-point calibration. To improve calibration accuracy, other calibration methods include three-point calibration using three calibration tubes and six-point calibration using six calibration tubes.

[0006] Traditional sample racks with a fixed number of slots cannot meet the requirements of diverse calibration methods. For example, a sample rack with five slots cannot accommodate the calibration requirements of six calibration tubes. A sample rack with six slots would have an extra slot for calibration requirements of two or three calibration tubes. Consequently, existing sample racks have poor compatibility with different calibration methods and a limited range of applications. Summary of the Invention

[0007] In view of this, the present application provides a sample rack assembly and a medical analysis device to solve the problem that a sample rack with a fixed number of sockets has poor compatibility with different calibration methods and a small scope of application.

[0008] In a first aspect, the present application provides a sample rack assembly, comprising:

[0009] The sample rack has a plurality of first insertion holes formed along its height direction;

[0010] The expansion rack has a plurality of second jacks formed along its height and a bottom plate enclosing the bottoms of the second jacks; the number and / or size of the second jacks are different from the number and / or size of the first jacks;

[0011] a connecting post, one end of which is connected to a side of the bottom plate facing away from the second insertion hole, and the other end of which is detachably connected to at least one first insertion hole of the sample rack;

[0012] The sample rack has a normal state and an extended state. In the normal state, the connecting column is separated from the sample rack and is suitable for inserting the sample tube through the first socket; in the extended state, the connecting column is connected to the sample rack and is suitable for inserting the sample tube through the second socket.

[0013] The sample rack assembly of the present application can choose to plug the sample tube through the first jack in the normal state, or choose to plug the sample tube through the second jack in the extended state according to the number of jacks required for different calibration methods. It has strong compatibility and a wide range of applications.

[0014] In an optional embodiment, the sample rack assembly is provided with two spaced-apart connecting posts, and the two connecting posts are respectively adapted to the first insertion holes.

[0015] Beneficial effect: The sample rack and the extension rack are fixed by inserting two connecting columns into the two first sockets respectively. While ensuring the stability of the connection between the two, the first sockets are also closed to prevent the operator from inserting the sample tube into the first socket in the extended state, thereby ensuring the accuracy of the test.

[0016] In an optional embodiment, the side of the base plate facing away from the second socket extends along the height direction of the expansion rack to form two spaced-apart connecting columns, which are axially symmetrically arranged along the axis of the sample rack. In the expanded state, each connecting column can be inserted into a first socket.

[0017] Beneficial effects: The connecting posts are extended from the bottom plate to form an integrated structure with stable structure; a pair of connecting posts are axially symmetrically arranged along the axis of the sample rack, which can further improve the connection stability between the sample rack and the extension rack.

[0018] In an optional embodiment, a fool-proof structure is further provided on a side of the bottom plate facing away from the second insertion hole, and a groove adapted to the fool-proof structure is further provided on a side of the sample rack provided with the first insertion hole.

[0019] Beneficial effect: The fool-proof structure is adapted to the groove of the sample rack, which can prevent the operator from connecting the sample rack and the extension rack in reverse, thereby improving the operation accuracy.

[0020] In an optional embodiment, the fool-proof structure includes a first limit block and a second limit block spaced apart on one side of the expansion rack; the sample rack is also spaced apart with a first limit groove adapted to the first limit block and a second limit groove adapted to the second limit block.

[0021] Beneficial effect: In the extended state, by inserting the first limiting block into the first limiting groove and the second limiting block into the second limiting groove, the operator is prevented from reversely connecting the sample rack and the extension rack, which can further improve the connection stability of the sample rack and the extension rack.

[0022] In an optional embodiment, the first limiting block is a cylinder, the second limiting block is a non-cylindrical body, the first limiting groove is a circular hole groove, and the second limiting groove is a groove adapted to the non-cylindrical body of the second limiting block.

[0023] Beneficial Effect: The first stop block is cylindrical, and the second stop block is non-cylindrical. In the extended state, the cylindrical first stop block can be inserted into the first stop slot, but cannot be inserted into the second stop slot. Similarly, the non-cylindrical second stop block can be inserted into the second stop slot, but cannot be inserted into the first stop slot, thereby forming a fool-proof structure and improving operational accuracy.

[0024] In an optional embodiment, the inner wall of the first insertion hole is further provided with a plurality of elastic members, and the plurality of elastic members form a ring around the inner wall of the first insertion hole.

[0025] Beneficial effect: By providing a plurality of elastic members on the inner wall of the first insertion hole, elastic force can be provided to stably clamp the connecting column or the sample tube into the first insertion hole.

[0026] In an optional embodiment, the length of the sample rack is the same as the length of the expansion rack.

[0027] Beneficial effects: The length of the sample rack is the same as that of the extension rack, which facilitates the mutual cooperation between the sample rack and the extension rack, and facilitates the transportation and transfer of the sample rack assembly.

[0028] In a second aspect, the present application further provides a medical analysis device, comprising:

[0029] Equipment body;

[0030] The sample rack assembly mentioned above is arranged on the device body.

[0031] Beneficial effect: The medical analysis equipment includes a sample rack, which has the same effect as the sample rack, that is, according to the number of jacks required for different calibration methods, it can be selected to calibrate or test through the second jack in the extended state, or to calibrate or test through the first jack in the normal state. It has strong compatibility and a wide range of applications.

[0032] In an optional embodiment, the method further includes:

[0033] An identification unit is provided on the expansion rack;

[0034] The detection unit is provided on the device body and is used to detect the identification unit to determine whether the sample rack is in an expanded state or a normal state.

[0035] Beneficial effect: By identifying the identification unit on the extension rack through the detection unit, it is possible to detect whether the extension rack is connected to the sample rack through the connecting column, thereby facilitating the judgment of whether the sample rack is in the extended state or the normal state, and facilitating use.

[0036] In an optional embodiment, the identification unit is a magnet, and the detection unit is a magnetic sensor.

[0037] Beneficial effect: The identification unit is a magnet, and the detection unit is a magnetic sensor. It is only necessary to detect whether the target area is magnetic by the magnetic sensor to determine whether the expansion rack is connected to the sample rack. The structure is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] FIG1 is a schematic structural diagram of a sample rack assembly in an expanded state according to an embodiment of the present application;

[0040] FIG2 is a schematic structural diagram of a sample rack assembly in a normal state according to an embodiment of the present application;

[0041] FIG3 is a schematic structural diagram of FIG2 from another perspective.

[0042] Description of reference numerals:

[0043] 1. Sample rack; 101. First insertion hole; 102. First limiting groove; 103. Second limiting groove; 104. Elastic member; 2. Extension rack; 201. Second insertion hole; 202. Bottom plate; 3. Connecting column; 4. First limiting block; 5. Second limiting block; 6. Identification unit. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0045] Sample racks with a fixed number of sockets cannot meet the requirements of use in multiple calibration modes, resulting in poor compatibility and a limited range of applications. The embodiments of the present application propose the use of sample racks and expansion racks with different numbers of sockets. Based on the socket number requirements of different calibration modes, calibration can be performed using the second socket in the expanded state or the first socket in the normal state. This provides strong compatibility and a wide range of applications.

[0046] The following describes an embodiment of the present application in conjunction with Figures 1 to 3.

[0047] According to an embodiment of the present application, on the one hand, a sample rack assembly is provided, which mainly includes: a sample rack 1, an expansion rack 2 and a connecting column 3. The sample rack 1 has a plurality of first sockets 101 along its height direction. The expansion rack 2 has a plurality of second sockets 201 along its height direction and a bottom plate 202 that closes the bottom of the second sockets 201; the number and / or size of the second sockets 201 are different from the number and / or size of the first sockets 101. One end of the connecting column 3 is connected to the side of the bottom plate 202 facing away from the second sockets 201, and the other end is detachably connected to at least one first socket 101 of the sample rack 1. The sample rack 1 has a normal state and an expanded state. In the normal state, the connecting column 3 is separated from the sample rack 1 and is suitable for inserting a sample tube through the first socket 101; in the expanded state, the connecting column 3 is connected to the sample rack 1 and is suitable for inserting a sample tube through the second socket 201.

[0048] The sample rack assembly of the present application embodiment can be configured to accept sample tubes through the first receptacle 101 in the normal state or through the second receptacle 201 in the extended state, depending on the receptacle quantity requirements of different calibration methods. The use of the second receptacle 201 and the first receptacle 101 can address the receptacle quantity requirements of different calibration methods, providing strong compatibility and a wide range of applications.

[0049] Specifically, the sample tube includes a reagent tube and a calibration tube. The calibration tube is used to store samples in the calibration stage. The reagent tube is used to store samples in the mass production stage. That is, the embodiment of the present application can not only cope with the number of sockets required for different calibration methods, but also cope with the number of sockets used for different reagent tubes. For example, according to the required number of detection reagents for the medical analysis equipment, the sample rack assembly is selected to connect the corresponding number of reagent tubes through the first socket 101 in the normal state, or the sample rack assembly is selected to connect the corresponding number of reagent tubes through the second socket 201 in the extended state, so as to expand the number of reagent tubes that the medical analysis equipment can detect, thereby improving the detection efficiency of the medical analysis equipment and improving the compatibility of the sample rack assembly with different medical analysis equipment.

[0050] Specifically, reagent tubes and calibration tubes are generally cylindrical tubes, so the first and second jacks 101, 201 can be made into circular holes, as shown in Figure 1. Openings can also be formed on one side of the first and second jacks 101, 201 to facilitate observation of the sample tubes inserted into the first and second jacks 101, 201.

[0051] It should be noted that the detachable connection between the connecting column 3 and the first socket 101 of the sample rack 1 can be achieved by conventional detachable connections such as snaps, screws, and bolts. Compared to fixed connections such as welding, the sample rack 1 and the extension rack 2 are made into an integral, non-detachable solution. The sample rack assembly of the embodiment of the present application can be used to connect the sample tube using the first socket 101 of the sample rack 1 or the second socket 201 of the extension rack 2 in different application scenarios, which is convenient to use, simple in structure, and low in cost.

[0052] Specifically, the number of first jacks 101 and the number of second jacks 201 can be set according to actual needs. For example, the number of second jacks 201 can be greater than the number of first jacks 101, or the number of second jacks 201 can be less than the number of first jacks 101.

[0053] In one embodiment, the number of first receptacles 101 is an odd number, and the number of second receptacles 201 is an even number greater than the number of first receptacles 101. Two different arrangements of odd and even numbers can be formed, further improving the compatibility and applicability of the sample rack assembly. For example, as shown in Figures 1 to 3, the number of first receptacles 101 is five, and the number of second receptacles 201 is six. For ease of use, the five first receptacles 101 are arranged in rows with equal spacing, and similarly, the six second receptacles 201 are also arranged in rows with equal spacing.

[0054] Optionally, the size of the second jack 201 differs from the size of the first jack 101, primarily in that the diameter of the second jack 201 differs from the diameter of the first jack 101. For example, the diameter of the second jack 201 is smaller than the diameter of the first jack 101. The expansion rack 2 may be an adapter rack formed by combining multiple adapters. In the normal state, a sample tube with a larger diameter can be directly inserted into the first jack 101. In the expanded state, a sample tube with a smaller diameter can be inserted into the first jack 101.

[0055] It should be noted that the present embodiment does not restrict the connection column 3. As long as the connection column 3 can connect to the expansion rack 2 and be removably connected to the first receptacle 101 of the sample rack 1, so that the sample rack 1 can have both an expanded state and a normal state, it is sufficient. Furthermore, the number of connection columns 3 can be one, two, or more, as needed.

[0056] In one embodiment, the sample rack assembly is provided with two spaced-apart connecting posts 3, each of which fits into the first receptacles 101. Inserting the two connecting posts 3 into the two first receptacles 101 secures the sample rack 1 and the expansion rack 2, ensuring a stable connection while also sealing the first receptacles 101. This prevents operators from inserting sample tubes into the first receptacles 101 while the sample rack is in the expanded state, thereby ensuring test accuracy.

[0057] Optionally, to balance cost and connection stability, in one embodiment, the side of the base plate 202 facing away from the second receptacle 201 extends along the height direction of the expansion rack 2 to form two spaced-apart connecting posts 3. The connecting posts 3 extend from the base plate 202 to form an integrated structure with stable structure. The two connecting posts 3 are arranged axially symmetrically along the axis of the sample rack 1. In the extended state, each connecting post 3 can be inserted into a first receptacle 101, and the base plate 202 can completely cover all first receptacles 101 of the sample rack 1. This can further improve the connection stability between the sample rack 1 and the expansion rack 2.

[0058] For example, as shown in Figure 2, the sample rack 1 has five first receptacles 101 arranged in a row along its height, with the axis of the third first receptacle 101 from left to right serving as the axis of the sample rack 1. The axes of the second and fourth first receptacles 101 are symmetrical with respect to the axis of the third first receptacle 101. A connecting post 3 is inserted into each of the second and fourth first receptacles 101 to enhance connection stability.

[0059] In one embodiment, a foolproof structure is provided on the side of the bottom plate 202 facing away from the second receptacle 201, and a groove that mates with the foolproof structure is provided on the side of the sample rack 1 with the first receptacle 101. The foolproof structure mates with the groove of the sample rack 1 to prevent operators from incorrectly connecting the sample rack 1 and the expansion rack 2, thereby improving operational accuracy.

[0060] Optionally, as shown in FIG3 , the foolproof structure includes a first stop block 4 and a second stop block 5 spaced apart on one side of the expansion rack 2. The sample rack 1 is further spaced apart and provided with a first stop groove 102 adapted to the first stop block 4 and a second stop groove 103 adapted to the second stop block 5. In the expanded state, by inserting the first stop block 4 into the first stop groove 102 and the second stop block 5 into the second stop groove 103, the operator is prevented from reversely connecting the sample rack 1 and the expansion rack 2, thereby further improving the connection stability between the sample rack 1 and the expansion rack 2 and preventing the sample rack 1 and the expansion rack 2 from shaking relative to each other.

[0061] It should be noted that the embodiments of the present application do not limit the first limit block 4 and the second limit block 5. As long as the first limit block 4 and the second limit block 5 are different in size or shape to form two different plug-in methods, it is sufficient to avoid the operator from reversely connecting the sample rack 1 and the expansion rack 2.

[0062] In one embodiment, the first limiting block 4 is a cylinder, and the second limiting block 5 is a non-cylindrical body, such as a rectangular parallelepiped, a triangular pyramid, etc. The first limiting groove 102 is a circular hole groove, and the second limiting groove 103 is a groove adapted to the non-cylindrical body of the second limiting block 5. For example, when the second limiting block 5 is a rectangular parallelepiped, the second limiting groove 103 is a rectangular groove. In the extended state, the cylindrical first limiting block 4 can be inserted into the circular hole-shaped first limiting groove 102, but cannot be inserted into the second limiting groove 103. Similarly, the non-cylindrical second limiting block 5 can be inserted into the second limiting groove 103, but cannot be inserted into the first limiting groove 102, thereby forming a fool-proof structure and improving the accuracy of operation.

[0063] In one embodiment, the inner wall of the first socket 101 is further provided with a plurality of elastic members 104, and the plurality of elastic members 104 form a ring around the inner wall of the first socket 101. By providing a plurality of elastic members 104 on the inner wall of the first socket 101, elastic force can be provided to stably clamp the connecting column 3 or the sample tube into the first socket 101. When the connecting column 3 or the sample tube is inserted into the first socket 101, the elastic member 104 is squeezed, thereby achieving a stable positioning effect. The elastic member 104 can be deformed after being squeezed, so the first socket 101 can also accommodate connecting columns 3 and sample tubes of different sizes. As long as the diameter of the connecting column 3 and the sample tube is smaller than the diameter of the first socket 101, it can be sufficient.

[0064] Specifically, the elastic member 104 can be a spring. One end of the spring is fixed to the inner wall of the first receptacle 101 using conventional fixing methods such as screws and bolts. The other end of the spring extends downward toward the axis of the first receptacle 101 and can contact the connecting column 3, sample tube, etc., thereby being squeezed and deformed. Of course, in other embodiments, the elastic member 104 can also be another conventional elastic member such as a spring.

[0065] In one embodiment, the length of the sample rack 1 is the same as that of the expansion rack 2. The length of the sample rack 1 is oriented as indicated by arrow A in Figure 1 . This allows the sample rack 1 and the expansion rack 2 to function as a seamless, integrated unit in the extended state. This facilitates the interaction between the sample rack 1 and the expansion rack 2, as well as the transportation and transfer of the sample rack assembly. It also prevents protruding portions of the sample rack 1 or the expansion rack 2 from accidentally injuring personnel or equipment, improving user safety.

[0066] According to another embodiment of the present application, a medical analysis device is provided, comprising: a device body and a sample rack assembly, the sample rack assembly being mounted on the device body. The medical analysis device including the sample rack assembly has the same function as the sample rack assembly, namely, it can be configured to accept sample tubes through first receptacle 101 in a normal state or through second receptacle 201 in an extended state, depending on the number of receptacles required for different calibration methods. This provides strong compatibility and a wide range of applications.

[0067] In one embodiment, the medical analysis device further includes an identification unit 6 and a detection unit (not shown). The identification unit 6 is disposed on the expansion rack 2. The detection unit is disposed on the device body and is configured to detect the identification unit 6 to determine whether the sample rack 1 is in the expanded state or the normal state. The detection unit recognizes the identification unit 6 on the expansion rack 2 and can detect whether the expansion rack 2 is connected to the sample rack 1 via the connecting column 3. This facilitates determination of whether the sample rack 1 is in the expanded state or the normal state, facilitating ease of use.

[0068] Specifically, the identification unit 6 can be fixed to the expansion rack 2 by gluing. The identification unit 6 can be any existing mechanism as needed. For example, the identification unit 6 is a magnet, and the detection unit is a magnetic sensor. Simply by detecting the presence of magnetism in the target area using the magnetic sensor, it can be determined whether the expansion rack 2 is connected to the sample rack 1. This simple structure is convenient and quick.

[0069] Compared with the method of spraying the sample rack 1 and the expansion rack 2 in different colors for distinguishing them, the embodiment of the present application adopts the detection unit and the recognition unit 6, which does not require human eyes to recognize, making it easier to distinguish the working status of the sample rack 1 and the expansion rack 2. In addition, the recognition method is simple and the degree of automation is high, which can meet the needs of automation development.

[0070] The working process of the embodiment of the present application is as follows:

[0071] If a six-point calibration method is used, the sample rack assembly is switched to the extended state, with six second receptacles 201. A calibration tube is inserted into each of the six second receptacles 201. The detection unit detects the magnetism of the identification unit 6. The medical analysis device advances one by one according to the positional parameters of the expansion rack 2, i.e., the spacing between the second receptacles 201, to perform six-point calibration.

[0072] If a combination of two-point and three-point calibration is used, the sample rack assembly is switched to the normal state. There are five first receptacles 101, and a calibration tube is inserted into each of the five first receptacles 101. The detection unit does not detect the magnetism of the identification unit 6. The medical analysis device advances one by one according to the positional parameters of the sample rack 1, namely, the spacing between the first receptacles 101, performing two-point and three-point calibration, respectively.

[0073] To achieve the basic functions of the medical analysis device, the medical analysis device in this embodiment may also include other necessary modules or components, such as a rack and a controller. It should be noted that the other necessary modules or components included in the medical analysis device may be of any suitable existing configuration. To clearly and concisely illustrate the technical solution provided by this embodiment, the aforementioned sections will not be detailed here, and the accompanying drawings have been simplified accordingly. However, it should be understood that the scope of the embodiments of this application is not limited by this.

[0074] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A sample rack assembly, characterized in that, include: A sample rack (1) is provided with a plurality of first insertion holes (101) along its height direction; An expansion rack (2) having a plurality of second plug holes (201) formed along its height direction and a bottom plate (202) closing the bottom of the second plug holes (201); the number and / or size of the second plug holes (201) are different from the number and / or size of the first plug holes (101); A connecting column (3), one end of which is connected to a side of the bottom plate (202) away from the second insertion hole (201), and the other end of which is detachably connected to at least one of the first insertion holes (101) of the sample rack (1); The sample rack (1) has a normal state and an extended state. In the normal state, the connecting column (3) is separated from the sample rack (1) and is suitable for plugging a sample tube through the first plug hole (101); in the extended state, the connecting column (3) is connected to the sample rack (1) and is suitable for plugging a sample tube through the second plug hole (201).

2. The sample rack assembly according to claim 1, characterized in that The sample rack assembly is provided with two connection posts (3) arranged at intervals, and the two connection posts (3) are respectively adapted to the first insertion holes (101).

3. The sample rack assembly according to claim 2, wherein The side of the bottom plate (202) facing away from the second insertion hole (201) extends along the height direction of the expansion rack (2) to form two spaced-apart connecting columns (3), and the two connecting columns (3) are axially symmetrically arranged along the axis of the sample rack (1). In the expanded state, each connecting column (3) can be inserted into one of the first insertion holes (101).

4. The sample rack assembly according to any one of claims 1 to 3, characterized in that, A foolproof structure is also provided on the side of the bottom plate (202) facing away from the second insertion hole (201), and a groove matching the foolproof structure is also provided on the side of the sample rack (1) provided with the first insertion hole (101).

5. The sample rack assembly according to claim 4, characterized in that, The foolproof structure comprises a first limit block (4) and a second limit block (5) which are arranged at intervals on one side of the expansion rack (2); the sample rack (1) is also provided with a first limit groove (102) adapted to the first limit block (4) and a second limit groove (103) adapted to the second limit block (5).

6. The sample rack assembly according to claim 5, wherein, The first limiting block (4) is a cylinder, the second limiting block (5) is a non-cylindrical body, the first limiting groove (102) is a circular hole groove, and the second limiting groove (103) is a groove adapted to the non-cylindrical body of the second limiting block (5).

7. The sample rack assembly according to claim 2, wherein, The inner wall of the first plug hole (101) is further provided with a plurality of elastic members (104), and the plurality of elastic members (104) surround the inner wall of the first plug hole (101) to form a ring shape.

8. The sample rack assembly according to claim 1, wherein The length of the sample rack (1) is the same as the length of the expansion rack (2).

9. A medical analysis device, characterized in that, include: Equipment body; The sample rack assembly according to any one of claims 1 to 8, wherein the sample rack assembly is arranged on the device body.

10. The medical analysis device according to claim 9, wherein, Also includes: An identification unit (6) is arranged on the expansion rack (2); A detection unit is arranged on the device body and is used to detect the identification unit (6) to obtain whether the sample rack assembly is in the extended state or the normal state.

11. The medical analysis device according to claim 10, characterized in that, The identification unit (6) is a magnet, and the detection unit is a magnetic sensor.

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