Test strip holder and liquid sample testing device

Abstract

The application provides a test strip holder and a liquid sample detection device, and relates to the technical field of liquid sample collection and detection. The main body has a collection cavity and a collection cavity inlet arranged on the top wall. An axial test strip mounting groove is arranged on the peripheral wall of the main body. The lower end surface and the side surface of the test strip mounting groove, which is away from the collection cavity along the radial direction of the main body, are in communication with the outside. The main body is not provided with a bottom wall, or is provided with a bottom wall and at least one liquid inlet hole is arranged on the bottom wall. The test strip fixing structure is used for fixing the test strip in the corresponding test strip mounting groove. The application can improve the accuracy of reading the test results of liquid samples, and is suitable for the detection and reading of various liquid samples, including but not limited to the detection of urine.

Description

Technical Field

[0001] This application relates to the field of liquid sample collection and detection technology, and in particular to a test strip holder and a liquid sample detection device. Background Technology

[0002] Liquid sample collection and testing technologies, especially urine testing, are widely used in various fields such as medicine, law enforcement, sports, and the workplace as a rapid and convenient laboratory method. Urine tests are typically used to detect specific "indicators" in urine, such as special chemicals, hormones, antibodies, or antigens, and play a particularly important role in drug testing. The urine cup is the main tool for urine testing.

[0003] Urine cups use one or more test strips as detection elements. Through a chemical reaction with urine, the test strips can detect the presence and concentration of specific substances in the urine. The test results are interpreted by observing the color change of the test strip. However, interpreting the results by the human eye has certain limitations, including subjectivity and insufficient accuracy. Therefore, it is preferable to use instruments to read the test results to provide more accurate and objective results.

[0004] Nevertheless, the design of traditional urine cups limits the accuracy of instrument readings to some extent. Specifically, the traditional design tightly adheres the test strip to the inner wall of the cup, typically secured by a blister pack or plastic component. The former uses the blister pack directly as a support structure, while the latter requires an additional layer of transparent adhesive film to ensure a tight seal. This means the machine's camera must penetrate the cup wall and at least one layer of material (such as the blister pack) to read the color change of the test strip, thus affecting reading accuracy. Furthermore, gaps may exist between the blister pack or adhesive film and the cup wall, allowing urine samples to easily seep into these gaps. Considering that urine is not completely transparent, this further interferes with the instrument's accurate readings, leading to inaccurate test results.

[0005] Therefore, improving the accuracy of machine-readable urine cup test results has become an urgent technical problem to be solved. Utility Model Content

[0006] The purpose of this application is to provide a test strip holder and a liquid sample detection device to improve the accuracy of reading test results for liquid samples. This application is applicable to the detection of various liquid samples and the reading of test results, including but not limited to the detection of urine.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] In a first aspect, this application provides a test strip holder, comprising:

[0009] The main body has a collection chamber and a collection chamber inlet located on the top wall; an axially extending test strip mounting groove is provided on the outer peripheral wall of the main body, and at least the lower end face and the side surface of the test strip mounting groove that is radially away from the collection chamber of the main body are in communication with the outside; the main body has no bottom wall or the main body has a bottom wall and at least one liquid inlet hole on its bottom wall;

[0010] A test strip fixing structure is used to fix the test strip in the corresponding test strip mounting slot.

[0011] In an optional embodiment, a recessed groove is provided on the lower outer peripheral wall of the main body at a location corresponding to each of the test strip mounting slots, which is recessed into the collection chamber.

[0012] In an optional embodiment, on a cross-section of the main body cut along the axial direction, the air-avoiding groove is parallel or inclined to the inner wall of the main body on the side radially away from the collection cavity.

[0013] And / or, the clearance groove is a continuous groove that is connected circumferentially along the main body;

[0014] And / or, the lower end of the clearance groove extends to the lower end face of the main body;

[0015] And / or, the portion of the lower inner peripheral wall of the main body corresponding to the air-proof groove protrudes towards the inside of the collection cavity.

[0016] In an optional embodiment, the main body has a bottom wall, the central region of which is recessed upward to form a liquid inlet groove between the central region of the bottom wall and the lower end inner peripheral wall of the main body, and the liquid inlet hole is located in the part of the bottom wall located inside the liquid inlet groove.

[0017] In an optional embodiment, the test strip fixing structure includes a mounting ring; the mounting ring is sleeved on the outside of the main body to press the test strip between the mounting ring and the test strip mounting groove.

[0018] In an optional embodiment, the outer peripheral wall of the main body is provided with a mounting ring mounting groove that connects each of the test strip mounting grooves in the circumferential direction, and the mounting ring is embedded inside the mounting ring mounting groove.

[0019] In an optional embodiment, the test strip fixing structure includes a test strip end fixing groove provided on the upper peripheral wall of the main body. The test strip end fixing groove is closed on both sides along the radial direction of the main body, and the upper end of the test strip mounting groove is connected to the lower end of the test strip end fixing groove.

[0020] In an optional embodiment, the test strip holder further includes a sealing structure disposed on the top outer peripheral wall of the main body, which is used to seal the gap between the top outer peripheral wall of the main body and the inner peripheral wall of the test cup when the test strip holder is installed inside the test cup.

[0021] In an optional embodiment, the sealing structure includes a sealing ring fitted onto the outer peripheral wall of the top of the body.

[0022] Secondly, this application provides a liquid sample detection device, including a test cup, a test strip, and the test strip holder described in the foregoing embodiments;

[0023] The test strip fixing structure fixes the test strip inside the corresponding test strip mounting groove; the upper end of the test strip bracket is sealed to the inner wall of the test cup, and the lower end face of the main body is spaced apart from the inner bottom wall of the test cup, and the outer peripheral wall of the main body and the inner wall of the test cup form a test cavity.

[0024] Specifically, the above "and / or" means that the structure before "and / or" and the structure after "and / or" are set simultaneously or selectively.

[0025] In the test strip holder and liquid sample detection device provided in this application, at least the lower end face and the side surface of the test strip mounting groove that is radially away from the collection cavity along the main body are connected to the outside. This means that when reading the result display surface of the test strip, there is no other obstruction between the test strip and the container wall (cup wall of the test cup), which reduces the light loss between the camera and the result display surface of the test strip. Whether the result is read by machine or by manual direct reading, the problem of misjudgment of test results is greatly reduced, and the accuracy of reading test results is improved.

[0026] Furthermore, in the case of assembling a test strip holder with test strips and test cups to form a liquid sample detection device, the liquid sample may contaminate areas that should not come into contact with the liquid when it is poured into the test cup, severely interfering with the accuracy of the test results. The test strip holder and liquid sample detection device provided in this application are designed with a collection chamber, a main body without a bottom wall, or a main body with a bottom wall and at least one liquid inlet hole on its bottom wall. During testing, the liquid sample is poured into the collection chamber of the main body through the inlet, and then flows into the test chamber for detection through the liquid inlet hole on the bottom wall, or directly into the test chamber when the main body does not have a bottom wall. This avoids such problems and further improves the accuracy of the test results.

[0027] For specific usage methods and design details of this application, please refer to the description in the detailed implementation section of this application specification. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the overall structure of an optional embodiment of the test strip holder provided in this application;

[0030] Figure 2 The embodiments provided in this application are related to Figure 1 A half-sectional isometric view of the liquid sample detection device corresponding to the test strip holder shown.

[0031] Figure 3 This is an isometric view of the overall structure of another optional embodiment of the test strip holder provided in this application.

[0032] Figure 4 for Figure 3 The exploded structure diagram of the test strip holder shown;

[0033] Figure 5 for Figure 3 Axonometric half-section schematic diagram of the main structure of the test strip holder shown;

[0034] Figure 6 For test strips and Figure 3 A schematic diagram of the assembly structure of the test strip holder shown;

[0035] Figure 7 The embodiments provided in this application are related to Figure 3 A cantilever half-section diagram of the liquid sample detection device corresponding to the test strip holder shown.

[0036] Icons: 1-Main body; 11-Collection chamber; 111-Collection chamber inlet; 112-Liquid inlet hole; 12-Test strip mounting slot; 13-Void relief slot; 14-Liquid inlet slot; 15-Mounting ring mounting slot; 16-Test strip end fixing slot; 17-Sealing slot; 2-Mounting ring; 3-Sealing ring; 4-Test strip; 5-Test cup; 51-Test chamber. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0040] In the description of this application, it should be noted that the terms "upper," "lower," "axial," "circumferential," "radial," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0043] Reference Figures 1 to 7 This application provides a test strip holder and a liquid sample detection device internally equipped with the test strip holder. This application is applicable to the detection of various liquid samples and the reading of detection results, including but not limited to the detection of urine. Specific embodiments of this application are as follows:

[0044] First aspect

[0045] This embodiment provides a test strip holder, which includes a main body 1 and a test strip fixing structure. The main body 1 has a collection cavity 11 and a collection cavity inlet 111 located on the top wall. A test strip mounting groove 12 extending axially is provided on the outer peripheral wall of the main body 1. The test strip mounting groove 12 communicates with the outside at least its lower end face and a side surface of the main body 1 that is radially away from the collection cavity 11. The main body 1 has no bottom wall or has a bottom wall with at least one liquid inlet hole 112 on its bottom wall. The test strip fixing structure is used to fix the test strip 4 to the corresponding test strip mounting groove 12.

[0046] It should be noted that the outer contour of the main body 1 of the test strip holder can be a cuboid, cylinder or prism, etc. The test strip mounting slot 12 can be designed as one, two or more as needed (e.g., the types of components to be detected, etc.). When two or more are provided, these test strip mounting slots 12 can be arranged at intervals along the circumference or transverse direction of the main body 1.

[0047] There are two ways to use it: using it alone or combining it with test cup 5 to form a liquid sample detection device.

[0048] (i) The test strip holder can be used alone. When using it, use the test strip fixing structure to fix the test strip 4 into the corresponding test strip mounting slot 12. Then, insert the lower end of the test strip holder into the liquid sample in the test container so that the sample application area at the lower end of the test strip 4 is immersed in the liquid sample. After the test time is over, read the result display surface of the test strip 4 to display the test result.

[0049] (II) Using the test strip fixing structure, fix the test strip 4 into the corresponding test strip mounting slot 12, and assemble the test strip holder and test cup 5 into a liquid sample detection device for use. (Refer to...) Figure 2 and Figure 7 The upper end of the test strip holder is sealed to the inner wall of the test cup 5 (the sealing connection method includes, but is not limited to, threaded connection and sealing with the addition of a sealing element), and the lower end face of the main body 1 is spaced apart from the inner bottom wall of the test cup 5. The outer peripheral wall of the main body 1 and the inner wall of the test cup 5 form a test cavity 51. This step can be completed before leaving the factory, simplifying the testing process and improving testing efficiency.

[0050] During testing, a liquid sample is poured into the collection chamber 11 of the main body 1 through the mouth of the test cup 5 and the inlet 111 on the main body 1. The liquid sample flows directly into the test chamber 51 through the liquid inlet 112 on the bottom wall or directly when the main body 1 does not have a bottom wall. When the liquid level is higher than the lower end of the test strip holder, the liquid level inside the test chamber 51 will no longer rise under atmospheric pressure. At this time, the sample application area at the lower end of the test strip 4 is immersed in the liquid sample. After the test time is over, the test result can be displayed on the result display surface of the test strip 4.

[0051] In the test strip holder and liquid sample detection device provided in this embodiment, at least the lower end face and the side surface of the test strip mounting groove 12 that is radially away from the collection cavity 11 of the main body 1 are connected to the outside. This means that when reading the result display surface of the test strip 4, there is no other obstruction between the test strip 4 and the container wall (cup wall of the test cup), which reduces the light loss between the camera and the result display surface of the test strip 4. Whether the result is read by machine or by manual direct reading, the problem of misjudging the test result is greatly reduced, and the accuracy of reading the test result is improved.

[0052] Furthermore, when using a liquid sample detection device assembled from various components, if the liquid sample is poured into the test cup 5, it may contaminate areas that should not come into contact with the liquid sample, severely interfering with the accuracy of the test results. For example, when using optical instruments to read the color change of the test strip 4, if the liquid sample contaminates the reading area, it will change the light transmission path, thus affecting the accuracy of color interpretation. In the test strip holder and liquid sample detection device provided in this embodiment, the collection chamber 11 is designed such that the main body 1 has no bottom wall or has a bottom wall with at least one liquid inlet hole 112 on its bottom wall. During testing, the liquid sample is poured into the collection chamber 11 of the main body 1 through the inlet 111 of the collection chamber. The liquid sample then flows directly into the test chamber 51 for detection through the liquid inlet hole 112 on the bottom wall or, if the main body 1 does not have a bottom wall, it can avoid such problems and further improve the accuracy of the test results.

[0053] Based on this, this embodiment has a variety of specific optional implementation methods, including but not limited to:

[0054] In an optional embodiment, a recessed groove 13 is provided on the lower outer peripheral wall of the main body 1 at a location corresponding to each test strip mounting groove 12, extending into the collection chamber 11. Capillary effect refers to the phenomenon of liquid automatically rising or falling in narrow channels or gaps. This phenomenon is caused by the combined action of surface tension and adhesion. In this optional embodiment, the design of the recessed groove 13 separates the test strip holder main body 1 from the sample application area at the lower end of the test strip 4, preventing tiny gaps from causing the liquid sample to rise along these gaps due to capillary action and diffuse unintended into areas where it should not come into contact with the liquid sample, thus interfering with the accuracy of the test results.

[0055] In this optional embodiment, further optionally, the aforementioned clearance groove 13, on the cross-section of the main body 1 cut along the axial direction, has its inner wall parallel or inclined to the central axis extending axially from the collection chamber 11 along the radial direction of the main body 1. Optionally, the clearance groove 13 is a continuous groove communicating circumferentially along the main body 1. This structure is easier to manufacture and assemble. Of course, in other optional embodiments, the same number of clearance grooves 13 as the test strip mounting groove 12 can be provided, with adjacent clearance grooves 13 spaced apart. When a test strip mounting groove 12 is provided, the first and last ends of a single clearance groove 13 along the circumference of the main body 1 can be interconnected or spaced apart. Additionally, optionally, the lower end of the clearance groove 13 extends to the lower end face of the main body 1. Optionally, to avoid the design of the clearance groove 13 reducing the structural strength of the main body 1, the portion of the lower inner circumferential wall of the main body 1 corresponding to the clearance groove 13 protrudes towards the interior of the collection chamber 11.

[0056] In an optional embodiment, the main body 1 has a bottom wall, with a central region of the bottom wall recessed upwards to form a liquid inlet groove 14 between the central region of the bottom wall and the lower inner peripheral wall of the main body 1. A liquid inlet hole 112 is located on the bottom wall within the liquid inlet groove 14. By designing the liquid inlet groove 14, when the test strip holder and test cup 5 are assembled into a liquid sample detection device, the poured liquid sample can be guided to flow into the test chamber 51 as quickly as possible, improving detection efficiency.

[0057] Regarding the specific design of the test strip fixing structure, this embodiment offers several optional configurations, such as:

[0058] In some optional embodiments of this example, the above-mentioned test strip fixing structure includes a mounting ring 2; the mounting ring 2 is sleeved on the outside of the main body 1 to press the test strip 4 between the mounting ring 2 and the test strip mounting groove 12. Optionally, the outer peripheral wall of the main body 1 is provided with a mounting ring mounting groove 15 that connects each test strip mounting groove 12 in the circumferential direction, and the mounting ring 2 is embedded in the mounting ring mounting groove 15.

[0059] And / or, in some optional embodiments of this example, the test strip fixing structure includes a test strip end fixing groove 16 provided on the upper peripheral wall of the main body 1. The test strip end fixing groove 16 is closed on both sides along the radial direction of the main body 1, and the upper end of the test strip mounting groove 12 is connected to the lower end of the test strip end fixing groove 16.

[0060] The above "and / or" indicates that, in this embodiment, the test strip fixing structure may only have the mounting ring 2 and not the test strip end fixing groove 16, or it may only have the test strip end fixing groove 16 and not the mounting ring 2. Alternatively, in some embodiments, the test strip fixing structure includes both the mounting ring 2 and the test strip end fixing groove 16 to achieve a dual fixing function, improve the installation reliability of the test strip 4, and prevent the test strip 4 from falling off or shifting and affecting the accuracy of the test results.

[0061] In an optional embodiment, the test strip holder also includes a sealing structure located on the top outer peripheral wall of the main body 1. This sealing structure seals the gap between the top outer peripheral wall of the main body 1 and the inner peripheral wall of the test cup 5 when the test strip holder is installed inside the test cup 5. Optionally, the sealing structure includes a sealing ring 3 fitted onto the top outer peripheral wall of the main body 1. To improve the sealing reliability of the sealing ring 3, a sealing groove 17 is optionally provided on the outer peripheral wall of the upper end of the main body 1 near the inlet 111 of the collection chamber. The sealing ring 3 is embedded in the sealing groove 17 to limit its position. The sealing ring 3 may be made of materials such as silicone, nylon, or polymer, and preferably, the sealing ring 3 is designed to protrude from the sealing groove 17 to enhance the sealing performance.

[0062] Second aspect

[0063] This embodiment also provides a liquid sample detection device, referring to... Figure 2 and Figure 7 This liquid sample detection device includes a test cup 5, a test strip 4, and a test strip holder provided in any of the optional embodiments of the first aspect. The test strip fixing structure fixes the test strip 4 inside the corresponding test strip mounting groove 12; the upper end of the test strip holder is sealed to the inner wall of the test cup 5, and the lower end face of the main body 1 is spaced apart from the inner bottom wall of the test cup 5, and the outer peripheral wall of the main body 1 and the inner wall of the test cup 5 form a test cavity 51.

[0064] In this embodiment, when the upper end of the test strip holder is sealed to the inner wall of the test cup 5, the specific sealing connection method includes, but is not limited to, threaded connection and adding a sealing element for sealing.

[0065] Preferably, a sealing structure is provided on the inner wall of the test cup 5 or the upper outer peripheral wall of the test strip holder. For example, in some embodiments, this sealing structure is provided on the top outer peripheral wall of the main body 1, including a sealing ring 3 fitted onto the top outer peripheral wall of the main body 1. After assembly, the sealing ring 3 presses against the inner wall of the test cup 5 to form a seal. To improve the sealing reliability of the sealing ring 3, a sealing groove 17 is further optionally provided on the outer peripheral wall of the upper end of the main body 1 near the inlet 111 of the collection chamber. The sealing ring 3 is embedded in the sealing groove 17 to limit the sealing ring 3. The sealing ring 3 can be made of materials such as silicone, nylon, or polymer, and preferably, the sealing ring 3 is designed to protrude from the sealing groove 17 to enhance the sealing performance. In other embodiments, a sealing groove is provided on the inner wall of the test cup 5, and a sealing ring is embedded therein. After assembly, the sealing ring presses against the upper outer peripheral wall of the test strip holder to form a seal.

[0066] Finally, it should be noted that:

[0067] 1. In this specification, unless otherwise specified, "and / or" means that the structure before "and / or" and the structure after "and / or" are set simultaneously or selectively.

[0068] 2. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. The above embodiments in this specification are only used to illustrate the technical solutions of this embodiment and are not intended to limit it. Although this embodiment has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A test strip holder, characterized in that: include: The main body has a collection chamber and a collection chamber inlet located on the top wall; an axially extending test strip mounting groove is provided on the outer peripheral wall of the main body, and at least the lower end face and the side surface of the test strip mounting groove that is radially away from the collection chamber of the main body are in communication with the outside; the main body has no bottom wall or the main body has a bottom wall and at least one liquid inlet hole on its bottom wall; A test strip fixing structure is used to fix the test strip in the corresponding test strip mounting slot.

2. The test strip holder according to claim 1, characterized in that: An air-proof groove is provided on the lower outer peripheral wall of the main body at a position corresponding to each of the test strip mounting slots, recessed into the collection chamber.

3. The test strip holder according to claim 2, characterized in that: On the cross-section of the main body along the axial direction, the inner wall of the air-avoiding groove on the side of the main body that is radially away from the collection cavity is parallel to or inclined to the central axis of the main body extending along the axial direction. And / or, the clearance groove is a continuous groove that is connected circumferentially along the main body; And / or, the lower end of the clearance groove extends to the lower end face of the main body; And / or, the portion of the lower inner peripheral wall of the main body corresponding to the air-proof groove protrudes towards the inside of the collection cavity.

4. The test strip holder according to claim 1, characterized in that: The main body has a bottom wall, and the middle region of the bottom wall is recessed upward to form a liquid inlet groove between the middle region of the bottom wall and the lower end inner peripheral wall of the main body. The liquid inlet hole is located in the part of the bottom wall inside the liquid inlet groove.

5. The test strip holder according to claim 1, characterized in that: The test strip fixing structure includes a mounting ring; the mounting ring is sleeved on the outside of the main body to press the test strip between the mounting ring and the test strip mounting groove.

6. The test strip holder according to claim 5, characterized in that: The outer peripheral wall of the main body is provided with an installation ring groove that connects each of the test strip installation grooves in the circumferential direction, and the installation ring is embedded inside the installation ring groove.

7. The test strip holder according to claim 1, characterized in that: The test strip fixing structure includes a test strip end fixing groove provided on the upper peripheral wall of the main body. The test strip end fixing groove is closed on both sides along the radial direction of the main body, and the upper end of the test strip mounting groove is connected to the lower end of the test strip end fixing groove.

8. The test strip holder according to any one of claims 1-7, characterized in that: The test strip holder also includes a sealing structure, which is disposed on the outer peripheral wall of the top of the main body and is used to seal the gap between the outer peripheral wall of the top of the main body and the inner peripheral wall of the test cup when the test strip holder is installed inside the test cup.

9. The test strip holder according to claim 8, characterized in that: The sealing structure includes a sealing ring fitted onto the outer peripheral wall of the top of the main body.

10. A liquid sample detection device, characterized in that: Includes a test cup, a test strip, and a test strip holder as described in any one of claims 1 to 9; The test strip fixing structure fixes the test strip inside the corresponding test strip mounting groove; the upper end of the test strip bracket is sealed to the inner wall of the test cup, and the lower end face of the main body is spaced apart from the inner bottom wall of the test cup, and the outer peripheral wall of the main body and the inner wall of the test cup form a test cavity.

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