A reaction cup, holding device, clamping device and sample analyzer

By adopting a "convex-concave-convex" arc-shaped clamping structure and arc-shaped groove design on the reaction cup, the problem of unstable gripping by the robotic arm was solved, and the stability of the reaction cup during the transfer process and the accuracy of the test results were improved.

CN224486080UActive Publication Date: 2026-07-14SHANGHAI SUNBIO TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI SUNBIO TECH
Filing Date
2025-06-25
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The robotic arm cannot accurately and stably grip the reaction cup when grasping it, resulting in inconsistent states after placement and affecting the accuracy of the test results.

Method used

A reaction cup is designed with a combination structure of "convex-concave-convex". The arc-shaped design of the clamping wall allows the jaws to clamp the reaction cup more smoothly, and the clamping stability is improved by the limiting effect of the second wall. At the same time, an arc-shaped groove is set on the cup body to facilitate the guidance and mixing of magnetic beads and improve the consistency of testing.

Benefits of technology

This improves the stability of the reaction vessel during the transfer process and the accuracy of the test results, ensures the consistency of the reaction vessel's state at each working position, and enhances operational flexibility and testing efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application relates to the field of medical device technology, specifically to a reaction cup, a holding device, a clamping device, and a sample analyzer. The reaction cup includes a cup body, which includes two opposing clamping walls. Each clamping wall includes a first wall portion and a second wall portion connected to both sides of the first wall portion along the circumference of the cup body. The outer surface of the first wall portion is an arc-shaped surface recessed into the cup body, and the outer surface of the second wall portion is an arc-shaped surface convex outwards from the cup body. The clamping walls of this application employ a combination structure of "convex-concave-convex". During the clamping process of the reaction cup, the arc-shaped second wall portion can act as a guide, making the cup body enter the clamping jaws more smoothly. In the clamped state, the second wall portions on both sides can limit the protrusions in the clamping jaws, improving the clamping stability of the cup body and ensuring that the reaction cup remains in a consistent state after being transferred to various working positions, thereby improving the accuracy of the test results.
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Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a reaction cup, a holding device, a clamping device, and a sample analyzer. Background Technology

[0002] During testing, the robotic arm of the sample analyzer needs to transfer the reaction cups to various working positions for detection. In related technologies, the gripper of the robotic arm cannot accurately and stably hold the reaction cups during the gripping process, leading to inconsistencies in their placement and affecting the consistency of test results. Utility Model Content

[0003] The purpose of this application is to provide a reaction cup, a container, a clamping device, and a sample analyzer to solve the problem of inaccurate and unstable clamping.

[0004] To solve the above-mentioned technical problems, this application provides a reaction cup, including a cup body, the cup body including two opposing clamping walls, the clamping walls including a first wall portion and a second wall portion connected to both sides of the first wall portion along the circumference of the cup body, the outer surface of the first wall portion being an arc-shaped surface recessed into the interior of the cup body, and the outer surface of the second wall portion being an arc-shaped surface protruding outward from the exterior of the cup body.

[0005] Optionally, the cup body is a hollow structure with one open end, and the open end of the cup body is connected to an outwardly extending rim. The clamping wall is located at one end close to the open end of the cup body.

[0006] Optionally, the cup body includes two opposing first walls and a second wall connected between the two first walls. The first wall includes the clamping wall, and at least one of the outer surface of the second wall and the outer surface of other areas of the first wall other than the clamping wall is a planar structure.

[0007] Optionally, the cross-sectional area of ​​the cup body gradually decreases along the direction from the open end to the closed end of the cup body.

[0008] Optionally, the inner surface of the closed end wall of the cup body is provided with an arc-shaped groove, and the reaction cup also includes a magnetic bead, which is movably installed in the arc-shaped groove.

[0009] This application also provides a container for a reaction cup, including a plurality of cup boxes stacked along the height direction, with a receiving cavity formed between two adjacent cup boxes. Each cup box has an opening at the top and a mounting groove extending along the height direction. The mounting groove is used to partially mount the aforementioned reaction cup, and the receiving cavity is used to partially accommodate the reaction cup.

[0010] This application also provides a clamping device for a reaction cup, including a jaw for clamping the aforementioned reaction cup;

[0011] The gripper includes two opposing gripping portions. Each of the two gripping portions has a first gripping wall and a second gripping wall. The first gripping wall is an arc-shaped wall that is recessed into the interior of the gripping portion. The second gripping wall is closer to the free end of the gripping portion than the first gripping wall. The width between the two second gripping walls gradually widens in the direction closer to the free end of the gripping portion. A protrusion is formed between the first gripping wall and the second gripping wall of the same gripping portion.

[0012] With the reaction cup held by the grippers, at least a portion of the protrusions are inserted into the recess formed by the outer surface of the first wall of the reaction cup. The outer surfaces of the first gripping wall and one side of the second wall are in contact, and the outer surfaces of the second gripping wall and the second wall on the other side are in contact.

[0013] Optionally, the opposing walls of the two clamping portions are provided with grooves that extend along the extending direction of the clamping portions and penetrate the free end wall of the clamping portions. At least a portion of the lower sidewall of the groove is used to support the lower surface of the rim of the reaction cup.

[0014] Optionally, the two clamping portions are arranged along a first direction, and the portion of the groove near the free end of the clamping portion is a first groove. The first groove penetrates both side walls of the clamping portion in the first direction, and the width of the first groove gradually expands along the direction near the free end of the clamping portion.

[0015] This application also provides a sample analyzer, including the aforementioned reaction cup clamping device.

[0016] The technical effects of this application are as follows:

[0017] In the reaction cup of this application, the outer surface of the first wall is recessed towards the inside of the cup body to form a concave portion, and the second wall is connected to both sides of the first wall along the circumference of the cup body. The outer surface of the second wall protrudes towards the outside of the cup body to form a convex portion. That is, the clamping wall of this application adopts a combination structure of "convex portion-concave portion-convex portion". During the clamping process of the reaction cup, the arc-shaped second wall can play a guiding role, making the cup body enter the inside of the clamp more smoothly. In the clamping state, the second walls on both sides can play a limiting role for the convex portion in the clamp, improving the clamping stability of the clamp on the cup body, so that the state of the reaction cup remains consistent after being transferred to each working position, thereby improving the accuracy of the test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the reaction cup provided in this application;

[0019] Figure 2 A schematic diagram of the gripper structure in a specific embodiment of the clamping device for the reaction cup provided in this application;

[0020] Figure 3 for Figure 2 A schematic diagram of the gripper in the clamping state;

[0021] Figure 4 for Figure 1 A cross-sectional view of the reaction vessel along its height.

[0022] Figure 5 A schematic diagram of the structure of a specific embodiment of a reaction vessel holding device in the state of holding the reaction vessel;

[0023] in, Figures 1-5 The accompanying figure labels are as follows:

[0024] 001-Reaction cup; 1-Cup body; 11-Clamping wall; 111-First wall; 112-Second wall; 1-1-First wall; 1-12-Enclosing wall; 1-2-Second wall; 1a-Arc groove; 2-Cup rim;

[0025] 01-Gripper; 011-Gripping part; 011a-First gripping wall part; 011b-Second gripping wall part; 011c-Groove part; A-Protrusion part; 0111-Lower side wall;

[0026] 02-Cup Box. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] It should be understood that the phrase "some embodiments" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0030] In this description, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0031] Please refer to Figures 1-3 , Figure 1 This is a schematic diagram of the structure of a specific embodiment of the reaction cup provided in this application; Figure 2 A schematic diagram of a specific embodiment of the clamping device for the reaction cup provided in this application; Figure 3 for Figure 2 A schematic diagram of the clamping device for the reaction vessel in the clamping state.

[0032] This application provides a reaction cup 001, including a cup body 1. The cup body 1 includes two opposing clamping walls 11. Each clamping wall 11 includes a first wall portion 111 and a second wall portion 112 connected to both sides of the first wall portion 111 along the circumference of the cup body 1. The outer surface of the first wall portion 111 is an arc-shaped surface that is recessed into the interior of the cup body 1, and the outer surface of the second wall portion 112 is an arc-shaped surface that is protruding outward from the interior of the cup body 1.

[0033] In the reaction cup 001 of this embodiment, the outer surface of the first wall portion 111 is recessed into the interior of the cup body 1 to form a recess. The second wall portion 112 is connected to both sides of the first wall portion 111 along the circumference of the cup body 1, and the outer surface of the second wall portion 112 protrudes outward from the cup body 1 to form a protrusion. That is, the clamping wall 11 in this embodiment adopts a combination structure of "protrusion-recession-protrusion". Correspondingly, Figure 2A clamping device for a reaction cup is shown, including a jaw 01 for clamping the reaction cup 001. The jaw 01 includes at least two opposing clamping portions 011. The opposing walls of the two clamping portions 011 each include a first clamping wall portion 011a and a second clamping wall portion 011b. The first clamping wall portion 011a is an arc-shaped wall portion recessed into the interior of the clamping portion 011. The second clamping wall portion 011b is closer to the free end of the clamping portion 011 than the first clamping wall portion 011a. The width between the two second clamping wall portions 011b gradually widens in the direction close to the free end of the clamping portion 011. A protrusion A is formed between the corresponding first clamping wall portion 011a and second clamping wall portion 011b.

[0034] Because the width between the two second clamping walls 011b gradually widens towards the free end of the clamping part 011, when the clamping jaw 01 clamps the reaction cup 001, the cup body 1 can more easily enter the interior of the clamping jaw 01 from the open end of the clamping jaw 01; and during the process of the cup body 1 entering the interior of the clamping jaw 01, the protrusion A will slide along the outer surface of the second wall 112 on the side that first enters the interior of the clamping jaw 01. Since the outer surface of the second wall 112 is an arc surface, the second wall 112 can better guide the protrusion A, improving the smoothness of the cup body 1 entering the interior of the clamping jaw 01; when at least part of the protrusion A is inserted... When the cup body 1 is in the recess formed on the outer surface of the first wall 111, the cup body 1 is in the preset clamping position. The outer surface of the first clamping wall 011a and the second wall 112 on the side that first enters the inside of the gripper 01 are in contact. The second clamping wall 011b and part of the outer surface of the second wall 112 on the other side are in contact. The second walls 112 on both sides play a limiting role for the protrusion A, improving the clamping stability of the gripper 01 on the cup body 1, and preventing the position of the reaction cup 001 from shifting or rotating during the transfer process as much as possible. This ensures that the state of the reaction cup 001 remains consistent after it is transferred to each working position, thereby improving the accuracy of the test results.

[0035] In some embodiments, the two second wall portions 112 have identical structures and are arranged symmetrically, so that the grippers 01 can be gripped from both sides of the reaction cup 001, increasing operational flexibility.

[0036] In some embodiments, the first wall portion 111 and the second wall portion 112 are smoothly connected, making it easier for the cup body 1 to enter or exit the gripper 01 and more convenient to operate.

[0037] Please continue to refer to this. Figure 1 In this embodiment of the application, the cup body 1 is a hollow structure with one end open. The open end of the cup body 1 is connected to an outwardly extending cup rim 2, and the clamping wall 11 is located at one end close to the open end of the cup body 1.

[0038] As configured above, when the gripper 01 holds the reaction cup 001, the gripper 01 can also fit against at least part of the lower surface of the cup edge 2, which plays a limiting role in the height direction of the reaction cup 001, further improving the gripping stability of the cup body 1.

[0039] Please continue to refer to this. Figure 1 In this embodiment of the application, the cup body 1 includes two first walls 1-1 disposed opposite to each other, and a second wall 1-2 connected between the two first walls 1-1. The first wall 1-1 includes a clamping wall 11. At least one of the outer surface of the second wall 1-2 and the outer surface of other areas of the first wall 1-1 other than the clamping wall 11 is a planar structure.

[0040] Define the area of ​​the first wall 1-1, excluding the clamping wall 11, as the enclosing wall 1-12. The clamping wall 11 is located at the end near the open end of the cup body 1, and the enclosing wall 1-12 is located at the end near the closed end of the cup body 1. If the outer surface of the second wall 1-2 is a planar structure, then when the reaction cup 001 is installed in the test hole of the test system, the outer surfaces of the two second walls 1-2 can act as guides, making it less likely for the reaction cup 001 to tilt or deviate after installation in the test hole of the test system, thus improving the installation position accuracy of the reaction cup 001. If the first wall 1-1 is a planar structure, then the second wall 1-2 is a planar structure. If the outer surfaces of the areas other than the clamping wall 11 in the first wall 1-1 are planar, then when the reaction cup 001 is installed in the test hole of the test system, the outer surfaces of the two enclosing walls 1-12 can act as guides, improving the installation position accuracy of the reaction cup 001. If the outer surfaces of the second wall 1-2 and the outer surfaces of the areas other than the clamping wall 11 in the first wall 1-1 are all planar, then the outer surfaces of the two second walls 1-2 and the two enclosing walls 1-12 can all act as guides, improving the installation position accuracy of the reaction cup 001.

[0041] In some embodiments of this application, the cross-sectional area of ​​the cup body 1 gradually decreases along the direction from the open end of the cup body 1 to the closed end of the cup body 1.

[0042] As described above, the reaction cup 001 has a conical structure that is larger at the top and smaller at the bottom. This facilitates the demolding of the reaction cup 001 after injection molding, further improving the molding quality and production efficiency of the reaction cup 001. It also makes it easier to insert the reaction cup 001 into the test hole of the testing system, thereby improving testing efficiency.

[0043] Please refer to Figure 4 , Figure 4 for Figure 1 A cross-sectional view of the reaction vessel along its height.

[0044] In this embodiment, the inner surface of the closed end wall of the cup body 1 is provided with an arc-shaped groove 1a, and the reaction cup 001 also includes a magnetic bead, which is movably installed in the arc-shaped groove 1a.

[0045] As described above, the arc-shaped groove 1a guides the magnetic beads. During testing, the magnetic beads can flexibly swing or rotate within the arc-shaped groove 1a under the drive of the magnetic field, accelerating the mixing of sample plasma and reagents, reducing human error, and improving reaction uniformity. By monitoring the signal changes caused by the movement of the magnetic beads, the testing instrument can accurately capture the coagulation time point of the plasma, complete quantitative analysis, and improve the accuracy of the test results. Simultaneously, the arc-shaped structure of the guide groove ensures smoother movement of the magnetic beads.

[0046] Magnetic beads can be made of inert metals, such as stainless steel. The diameter of the magnetic beads ranges from 2.0mm to 2.38mm. The manufacturing process requires a smooth surface, free from eccentricity or deformation, to ensure smoother movement of the beads. Magnetic beads should also have good corrosion resistance.

[0047] Furthermore, in this embodiment, the reaction cup 001 is made of a transparent material, which facilitates observation of the coagulation reaction process and improves the accuracy of test results and operational safety.

[0048] Among them, the reaction cup 001 can be injection molded from a plastic material with high light transmittance, and can generally be made of materials such as acrylic, PC (Polycarbonate), PS (Polystyrene), ABS (Acrylonitrile Butadiene Styrene copolymer).

[0049] Please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of a specific embodiment of the reaction cup holding device provided in this application, in the state of holding the reaction cup.

[0050] In this embodiment of the application, the reaction cup 001 is installed during the transfer process. Figure 5 The reaction cup holding device shown includes multiple cup boxes 02, which are stacked along the height direction. A receiving cavity is formed between two adjacent cup boxes 02. Each cup box 02 has an opening at the top and a mounting groove extending along the height direction. The mounting groove is used to partially install the aforementioned reaction cup, and the receiving cavity is used to partially accommodate the reaction cup 001.

[0051] As described above, multiple cup boxes 02 are stacked along the height direction, with adjacent cup boxes 02 forming a receiving cavity. When the reaction cup 001 is installed in the holding device, except for the reaction cup 001 installed in the uppermost cup box 02, the closed ends of the other reaction cups 001 are inserted into the corresponding mounting slots, and the open ends are located in the receiving cavity to prevent the internal magnetic beads from being lost during transportation or use. The reaction cup 001 installed in the uppermost cup box 02 can prevent the magnetic beads from falling out of the open end 120 by a thin film set inside the reaction cup 001; the film can be punctured during use.

[0052] This application embodiment also provides a clamping device for a reaction cup, including a gripper 01, the gripper 01 being used to clamp the aforementioned reaction cup 001;

[0053] The gripper 01 includes two opposing gripping portions 011. Each of the opposing walls of the two gripping portions 011 includes a first gripping wall portion 011a and a second gripping wall portion 011b. The first gripping wall portion 011a is an arc-shaped wall portion that is recessed into the interior of the gripping portion 011. The second gripping wall portion 011b is closer to the free end of the gripping portion 011 than the first gripping wall portion 011a. The width between the two second gripping wall portions 011b gradually widens in the direction closer to the free end of the gripping portion 011. A protrusion A is formed between the first gripping wall portion 011a and the second gripping wall portion 011b of the same gripping portion 011.

[0054] With the reaction cup 001 held by the gripper 01, at least a portion of the protrusion A is inserted into the recess formed by the outer surface of the first wall portion 111 of the reaction cup 001. The outer surface of the first gripping wall portion 011a is in contact with the outer surface of the second wall portion 112 on one side, and the outer surface of the second gripping wall portion 011b is in contact with a portion of the outer surface of the second wall portion 112 on the other side.

[0055] The clamping device for the reaction cup in this embodiment is used to clamp the aforementioned reaction cup 001, and therefore has the same technical effect as the aforementioned reaction cup 001, which will not be described again here.

[0056] like Figure 2 As shown in the embodiment of this application, the opposing walls of the two clamping portions 011 are provided with grooves 011c. The grooves 011c extend along the extending direction of the clamping portions 011 and penetrate the free end wall of the clamping portions 011. At least a portion of the lower side wall 0111 of the grooves 011c is used to support the lower surface of the cup rim 2 of the reaction cup 001.

[0057] As set above, when the gripper 01 is holding the reaction cup 001, at least part of the lower sidewall 0111 of the groove 011c can limit the reaction cup 001 in the height direction, further improving the gripping stability of the cup body 1.

[0058] Please continue to refer to this. Figure 2In this embodiment of the application, two clamping portions 011 are arranged along a first direction. The portion of the groove 011c near the free end of the clamping portion 011 is the first groove 011c-1. The first groove 011c-1 penetrates both side walls of the clamping portion 011 in the first direction. The width of the first groove 011c-1 gradually expands along the direction near the free end of the clamping portion 011.

[0059] As configured above, the width of the first groove 011c-1 gradually expands along the direction close to the free end of the clamping part 011. During the process of the cup body 1 entering the inside of the clamp 01, the cup edge 2 can enter the first groove 011c-1 more easily and thus be supported by at least part of the lower side wall 0111 of the groove 011c, thereby improving the smoothness of the cup body 1 entering the inside of the clamp 01.

[0060] This application also provides a sample analyzer, including the aforementioned reaction cup clamping device.

[0061] The sample analyzer of this application includes the aforementioned reaction cup clamping device, and therefore has the same technical effect as the aforementioned reaction cup clamping device, which will not be described again here.

[0062] Among them, the sample analyzer can detect and analyze samples (such as blood, urine, etc.), providing reliable digital evidence for the clinical diagnosis of various diseases in patients. The sample analyzer needs to use the aforementioned sample containers such as reaction cups during the detection process to hold the samples and analyze and detect them.

[0063] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A reaction vessel, characterized in that, The cup body (1) includes two opposing clamping walls (11). Each clamping wall (11) includes a first wall portion (111) and a second wall portion (112) connected to both sides of the first wall portion (111) along the circumference of the cup body (1). The outer surface of the first wall portion (111) is an arc-shaped surface that is recessed into the interior of the cup body (1), and the outer surface of the second wall portion (112) is an arc-shaped surface that is protruding outward from the cup body (1).

2. The reaction vessel according to claim 1, characterized in that, The cup body (1) is a hollow structure with one open end. The open end of the cup body (1) is connected to an outwardly extending cup rim (2). The clamping wall (11) is located at one end close to the open end of the cup body (1).

3. The reaction vessel according to claim 2, characterized in that, The cup body (1) includes two opposing first walls (1-1) and a second wall (1-2) connected between the two first walls (1-1). The first wall (1-1) includes the clamping wall (11). At least one of the outer surface of the second wall (1-2) and the outer surface of other areas of the first wall (1-1) other than the clamping wall (11) is a planar structure.

4. The reaction vessel according to any one of claims 1-3, characterized in that, Along the direction from the open end of the cup body (1) to the closed end of the cup body (1), the cross-sectional area of ​​the cup body (1) gradually decreases.

5. The reaction vessel according to any one of claims 1-3, characterized in that, The inner surface of the closed end wall of the cup body (1) is provided with an arc-shaped groove (1a), and the reaction cup (001) also includes a magnetic bead, which is movably installed in the arc-shaped groove (1a).

6. A container for a reaction vessel, characterized in that, The device includes multiple cup boxes (02), which are stacked along the height direction. A receiving cavity is formed between two adjacent cup boxes (02). Each cup box (02) has an opening at the top and a mounting groove extending along the height direction. The mounting groove is used to partially install the reaction cup (001) according to any one of claims 1-5. The receiving cavity is used to partially accommodate the reaction cup (001).

7. A clamping device for a reaction vessel, characterized in that, Includes a gripper (01) for holding the reaction cup according to any one of claims 1-5; The gripper (01) includes two opposing gripping portions (011). Each of the two gripping portions (011) has a first gripping wall (011a) and a second gripping wall (011b) on its opposing wall. The first gripping wall (011a) is an arc-shaped wall that is recessed into the interior of the gripping portion (011). The second gripping wall (011b) is closer to the free end of the gripping portion (011) than the first gripping wall (011a). The width between the two second gripping wall portions (011b) gradually widens in the direction close to the free end of the gripping portion (011). A protrusion (A) is formed between the first gripping wall (011a) and the second gripping wall (011b) of the same gripping portion (011). With the gripper (01) holding the reaction cup (001), at least a portion of the protrusion (A) is inserted into the recess formed on the outer surface of the first wall portion (111) of the reaction cup (001). The outer surface of the first gripping wall portion (011a) and the second wall portion (112) on one side are in contact, and the outer surface of the second gripping wall portion (011b) and a portion of the outer surface of the second wall portion (112) on the other side are in contact.

8. The clamping device for the reaction vessel according to claim 7, characterized in that, The opposing walls of the two clamping portions (011) are provided with grooves (011c), which extend along the extension direction of the clamping portions (011) and penetrate the free end wall of the clamping portions (011). At least a portion of the lower side wall (0111) of the groove (011c) is used to support the lower surface of the rim (2) of the reaction cup (001).

9. The clamping device for the reaction vessel according to claim 8, characterized in that, The two clamping portions (011) are arranged along a first direction. The portion of the groove (011c) near the free end of the clamping portion (011) is a first groove (011c-1). The first groove (011c-1) penetrates both side walls of the clamping portion (011) in the first direction. The width of the first groove (011c-1) gradually expands along the direction near the free end of the clamping portion (011).

10. A sample analyzer, characterized in that, The device includes the clamping device for the reaction cup as described in any one of claims 7-9.