Food safety detection equipment quality control system based on colloidal gold immunodetection principle

Abstract

The invention relates to the technical field of rapid detection, in particular to a food safety detection equipment quality control system based on a colloidal gold immunodetection principle, which comprises an upper shell and a lower shell, and the upper shell is provided with a dropping port and an observation window; the bottom plate is installed on the lower shell, a detection structure is arranged on the bottom plate, a disconnection area is formed in the middle of the detection structure, and a C line and a T line on the detection structure directly face the observation window; the positioning assembly is arranged on the lower shell, the positioning assembly comprises a positioning piece and an abutting structure, and the positioning piece and the abutting structure are matched with the bottom plate and can fix the bottom plate; the connecting structure is arranged on the upper shell, a second sample pad is connected to the connecting structure, and the length of the second sample pad is larger than that of the disconnected area; the plugging assembly is connected with the connecting structure, the plugging assembly can plug the dropping port, and when the connecting structure acts to enable the second sample pad to be attached to the detection structure, the dropping port is conducted, so that the equipment is prevented from being polluted.

Description

Technical Field

[0001] The invention relates to the technical field of rapid detection, in particular to a food safety detection equipment quality control system based on the colloidal gold immunoassay principle. Background Art

[0002] With the improvement of economic level, people's demand for food is increasing, and food safety issues are receiving increasing attention. In order to ensure food safety, the demand for food safety testing equipment is increasing, and the requirements for its detection sensitivity and accuracy are also getting higher and higher.

[0003] Colloidal gold immunoassay kits can realize visual detection and have the advantages of simple operation, high sensitivity, convenient carrying and wide detection range, so they are widely used in the field of food safety detection. The kit is based on the specific binding of antigen and antibody, using colloidal gold as a tracer marker, and using colloidal gold to amplify the signal to achieve visual detection.

[0004] However, the dropping holes on commercially available colloidal gold immunoassay kits are basically open, and the sample pad in the box is always kept in contact with the colloidal gold pad; during the detection process, if external contaminants are accidentally dropped into the box, the coating on the test paper in the box will be diluted, reducing the detection accuracy and even causing the kit to fail. Summary of the invention

[0005] The purpose of the present invention is to provide a food safety testing equipment quality control system based on the colloidal gold immunoassay principle to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The food safety testing equipment quality control system based on the colloidal gold immunoassay principle includes:

[0008] An upper shell and a lower shell, wherein the upper shell is provided with a dripping port and an observation window, and a sealing ring is provided between the upper shell and the lower shell;

[0009] A bottom plate is mounted on the lower shell, a detection structure is arranged on the bottom plate, a disconnection area is formed in the middle of the detection structure, and a C line and a T line on the detection structure are directly opposite to the observation window;

[0010] A positioning assembly is arranged on the lower shell, and the positioning assembly includes a positioning member and an abutment structure, and the positioning member and the abutment structure cooperate with the bottom plate to fix the bottom plate;

[0011] A connecting structure, arranged on the upper shell, a No. 2 sample pad is connected to the connecting structure, and a length of the No. 2 sample pad is greater than a length of the disconnected area;

[0012] The blocking component is connected to the connection structure, and the blocking component can block the dripping port. When the connection structure is actuated to make the second sample pad adhere to the detection structure, the dripping port is opened.

[0013] As a further solution of the present invention: the detection structure includes a No. 1 sample pad, a colloidal gold pad, an NC membrane and a water-absorbing filter paper arranged along the length direction of the bottom plate, and the disconnection area is formed between the No. 1 sample pad and the colloidal gold pad;

[0014] The C-line and the T-line are disposed on the NC film.

[0015] As a further solution of the present invention: arc portions are formed at both ends of the bottom plate;

[0016] The positioning member is integrally formed with the lower shell, and the positioning member is provided with a retardation groove along its length direction, the retardation groove is in an arc-like shape, and the radius of the retardation groove is the same as the radius of the arc portion;

[0017] A No. 1 inclined guide surface is formed on each of the two side edges of the retardation groove, and the two No. 1 inclined guide surfaces can guide the bottom plate.

[0018] As a further solution of the present invention: the abutment structure comprises a stop block integrally formed with the lower shell, the stop block is provided with an elastic member, and one end of the elastic member away from the stop block is connected to the abutment member;

[0019] The end of the abutment member away from the stop block is provided with a second inclined guide surface and a groove, and the circumferential radius of the groove is the same as the circumferential radius of the arc portion.

[0020] As a further solution of the present invention: the connection structure comprises a connection frame connected to the second sample pad, the connection frame is provided with a trigger shaft penetrating the upper shell, and the connection frame is connected to the blocking assembly;

[0021] When the No. 2 sample pad is separated from the No. 1 sample pad, the end of the trigger shaft away from the connecting frame is flush with the outer surface of the upper shell;

[0022] The connection structure also includes a locking kit arranged between the upper shell and the connection frame.

[0023] As a further solution of the present invention: the locking kit includes a convex shaft symmetrically arranged on the connecting frame and an elastic frame arranged on the upper shell, and the elastic frame is in a "mouth"-shaped structure;

[0024] Two groups of protrusions are symmetrically arranged on the inner side of the elastic frame, and the protrusions can limit the convex shaft.

[0025] As a further solution of the present invention: the blocking assembly includes a guide member arranged on the upper shell, a blocking plate slidably mounted in the guide member and slidingly fitted with the inner wall of the upper shell, a connecting member is connected to one side of the blocking plate, and an end of the connecting member away from the blocking plate is connected to the connecting frame;

[0026] When the connecting frame moves away from the upper shell, the blocking plate can move along the guiding direction of the guiding member.

[0027] As a further solution of the present invention: a conducting hole is formed on the blocking plate, and when the No. 2 sample pad is attached to the No. 1 sample pad, the conducting hole overlaps with the dripping port.

[0028] As a further solution of the present invention: a connecting shaft is arranged on the upper shell body, a connecting sleeve is arranged on the lower shell body, and the connecting shaft is adapted to the connecting sleeve.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] By providing the positioning member and the abutment structure, when the retardation groove and the groove cooperate with the end of the bottom plate, the bottom plate can be connected between the two, thereby improving the connection stability between the bottom plate and the lower shell, and in the process of pressing the bottom plate, the abutment member can react on the bottom plate, so that under the action of the No. 1 inclined guide surface, the bottom plate can be automatically aligned. In summary, the cooperation between the positioning member and the abutment member has the dual effect of fixing and positioning the bottom plate;

[0031] By setting the connection structure, the No. 2 sample pad can be separated from the No. 1 sample pad and the colloidal gold pad in the initial state, so as to prevent external pollutants from entering the No. 1 sample pad from the dripping port and diffusing to the NC membrane, causing the NC membrane to be contaminated and fail. In the detection, the No. 2 sample pad can be attached to the No. 1 sample pad and the colloidal gold pad by pressing the trigger shaft, so that when the liquid to be detected enters the No. 1 sample pad, it can be diffused to the NC membrane, that is, it can autonomously control whether to perform the detection according to the use intention, reducing waste;

[0032] By setting the blocking component, when the No. 2 sample pad is separated from the No. 1 sample pad, the dripping port can be blocked, thereby producing a double protection effect and preventing external pollutants from entering the No. 1 sample pad through the dripping port. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The present invention is a structural schematic diagram of an embodiment of a quality control system for food safety testing equipment based on the colloidal gold immunoassay principle.

[0034] Figure 2 The structure explosion diagram of an embodiment of a food safety testing equipment quality control system based on the colloidal gold immunoassay principle.

[0035] Figure 3 This is a structural explosion diagram from another angle of an embodiment of a food safety testing equipment quality control system based on the colloidal gold immunoassay principle.

[0036] Figure 4 for Figure 3 A magnified view of the structure at center.

[0037] Figure 5 The present invention is a structural schematic diagram of a partial connection structure in an embodiment of a quality control system for food safety testing equipment based on the colloidal gold immunoassay principle.

[0038] Figure 6 The present invention is a schematic diagram of the structure of the detection structure in one embodiment of a food safety detection equipment quality control system based on the colloidal gold immunoassay principle.

[0039] Figure 7 The present invention is a schematic structural diagram of a positioning component in an embodiment of a quality control system for food safety testing equipment based on the colloidal gold immunoassay principle.

[0040] Figure 8 The present invention is a structural schematic diagram of an abutment structure in an embodiment of a quality control system for food safety testing equipment based on the colloidal gold immunoassay principle.

[0041] In the figure: 1. upper shell; 101. dripping port; 102. observation window; 2. lower shell; 3. sealing ring; 4. positioning member; 401. retardation groove; 402. inclined guide surface No. 1; 5. abutment member; 501. inclined guide surface No. 2; 502. groove; 6. elastic member; 7. stop block; 8. bottom plate; 9. sample pad No. 1; 10. colloidal gold pad; 11. NC membrane; 12. absorbent filter paper; 13. sample pad No. 2; 14. connecting frame; 1401. convex shaft; 15. trigger shaft; 16. connecting member; 17. blocking plate; 1701. conducting hole; 18. guide member; 19. elastic frame; 1901. protrusion; 20. connecting shaft; 21. connecting sleeve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0044] See also Figures 1 to 8 In the embodiment of the present invention, the food safety detection equipment quality control system based on the colloidal gold immunoassay principle includes: an upper shell 1 and a lower shell 2, a bottom plate 8, a positioning component, a connection structure and a blocking component, so that in the initial state, the No. 2 sample pad 13 can be separated from the No. 1 sample pad 9 and the colloidal gold pad 10, so as to avoid external contaminants from entering the No. 1 sample pad 9 from the dripping port 101 and diffusing to the NC membrane 11, causing the NC membrane 11 to be contaminated and fail, and during detection, by pressing the trigger shaft 15, the No. 2 sample pad 13 can be attached to the No. 1 sample pad 9 and the colloidal gold pad 10, and when the liquid to be detected enters the No. 1 sample pad 9, it can be diffused to the NC membrane 11, that is, it can autonomously control whether to perform detection according to the use intention, reducing waste, as follows:

[0045] The upper shell 1 is provided with a dripping port 101 and an observation window 102, and a sealing ring 3 is provided between the upper shell 1 and the lower shell 2, the upper shell 1 is provided with a connecting shaft 20, and the lower shell 2 is provided with a connecting sleeve 21, the connecting shaft 20 is adapted to the connecting sleeve 21, wherein the circumferential radius of the connecting shaft 20 is slightly smaller than the inner diameter of the connecting sleeve 21, so that when the connecting shaft 20 is inserted into the connecting sleeve 21, the two are interference fit, so as to achieve the purpose of improving the connection strength between the upper shell 1 and the lower shell 2, and at the same time, after the upper shell 1 and the lower shell 2 are installed, the sealing ring 3 placed between the two can improve the sealing between the upper shell 1 and the lower shell 2, and prevent external pollutants from entering between the upper shell 1 and the lower shell 2, causing the device to be contaminated.

[0046] The bottom plate 8 is mounted on the lower housing 2, and a detection structure is provided on the bottom plate 8. A disconnection area is formed in the middle of the detection structure, and the C line and the T line on the detection structure are directly opposite to the observation window 102. Specifically, arc portions are formed at both ends of the bottom plate 8.

[0047] For expansion, the bottom plate 8 can be made of PS material, which is a colorless and transparent thermoplastic plastic with the advantages of good electrical insulation, easy coloring, good mechanical strength and rigidity, good chemical corrosion resistance, light weight, and easy processing and molding;

[0048] The bottom plate 8 may also be made of PVC material, which has the advantages of good plasticity, corrosion resistance, good electrical insulation performance, safety and environmental protection, no generation of harmful substances during production and use, lightness, waterproofness and moisture resistance, good surface flatness, light weight, wear resistance and low price.

[0049] The detection structure includes a No. 1 sample pad 9, a colloidal gold pad 10, an NC membrane 11 and a water-absorbing filter paper 12 arranged along the length direction of the bottom plate 8, and the disconnection area is formed between the No. 1 sample pad 9 and the colloidal gold pad 10;

[0050] The C line and the T line are disposed on the NC film 11 .

[0051] When in use, the liquid to be tested is dripped onto the No. 1 sample pad 9, and flows to the NC membrane 11 through the No. 2 sample pad 13 and the colloidal gold pad 10 by capillary action, and reacts to display color. Specifically, colloidal gold has the function of signal amplification. The antigen (antibody) in the liquid to be tested specifically binds to the antibody (antigen) fixed in advance at the NC membrane 11 and is retained, so that the area displays a certain color and a strip appears, also called the T line. The remaining sample continues to move, and the unbound gold marker binds to the second receptor on the membrane, accumulating to form a strip of a certain color, also called the C line. If the C line does not show color, the test is invalid. The lighter the color of the T line, the higher the content in the sample.

[0052] It should be noted that the C line and T line set on the NC film 11 represent the control line and the detection line respectively. The control line is filled with an 8*1mm rectangular area. The filling color can be set according to the specific product performance. The preferred RGB filling value range is 100-200. The detection line is filled with an 8*1mm rectangular area. The filling color is as shown in Table 1. The optional filling color is as shown in Table 2. The spacing between the C line and the T line is 4-4.5mm, preferably 4.2mm.

[0053] Table 1 T line filling value

[0054] card number R-Value G-Value B value A1 246 246 246 A2 224 224 224 A3 198 198 198 A4 188 188 188 A5 171 171 171 A6 158 158 158

[0055] Table 2 T line filling value

[0056] card number R-Value G-Value B value A1 255 255 255 A2 200 200 200 A3 150 150 150 A4 100 100 100 A5 50 50 50 A6 0 0 0

[0057] Specifically, the C line and T line filled with RGB using image processing software can be standardized by measuring.

[0058] Through the above settings, a quality control system can be designed by simulating actual products and standardized through measurement. This quality control system can be applied to the quality control of detection equipment based on the colloidal gold immunoassay principle and to standardize the quality of food testing equipment.

[0059] See also Figure 2 , Figure 7-8 The positioning assembly is arranged on the lower shell 2, and the positioning assembly includes a positioning member 4 and an abutment structure. The positioning member 4 and the abutment structure cooperate with the bottom plate 8 to fix the bottom plate 8;

[0060] The positioning member 4 is integrally formed with the lower shell 2, and the positioning member 4 is provided with a retardation groove 401 along its length direction, the retardation groove 401 is in an arc-like shape, and the radius of the retardation groove 401 is the same as the radius of the arc portion;

[0061] A first inclined guide surface 402 is formed on each of the two sides of the retardation groove 401, and the two first inclined guide surfaces 402 can guide the bottom plate 8;

[0062] The abutment structure comprises a stop block 7 integrally formed with the lower housing 2, an elastic member 6 is arranged on the stop block 7, and an abutment member 5 is connected to one end of the elastic member 6 away from the stop block 7;

[0063] The end of the abutment member 5 away from the stop block 7 is provided with a second inclined guide surface 501 and a groove 502 , and the circumferential radius of the groove 502 is the same as the circumferential radius of the arc portion.

[0064] During assembly, the arc portion at one end of the bottom plate 8 is inserted into the retardation groove 401, and then the other side of the bottom plate 8 is pressed downward. At this time, the other end of the bottom plate 8 can abut against the No. 2 inclined guide surface 501 on the abutment 5, and when the bottom plate 8 continues to be pressed downward, the No. 2 inclined guide surface 501 can cooperate with the other end of the bottom plate 8, so that the abutment 5 moves toward the stop block 7. During this process, the elastic member 6 is compressed and bent, and at the same time, the abutment 5 can act in the opposite direction on the bottom plate 8, so that the bottom plate 8 reacts to the positioning member 4. At this time, the side portion of one end of the bottom plate 8 can cooperate with the No. 1 inclined guide surface 402, so that this end of the bottom plate 8 can be automatically aligned. At the same time, after the bottom plate 8 is pressed into place, the other end of the bottom plate 8 can be snapped into the groove 502, thereby improving the connection stability between the bottom plate 8 and the lower shell 2.

[0065] Through the above arrangement, when the retardation groove 401, the groove 502 and the end of the bottom plate 8 cooperate, the bottom plate 8 can be connected between the two, thereby improving the connection stability between the bottom plate 8 and the lower shell 2, and in the process of pressing the bottom plate 8, the abutment 5 can react on the bottom plate 8, so that under the action of the No. 1 inclined guide surface 402, the bottom plate 8 can be automatically aligned. In summary, the cooperation between the positioning member 4 and the abutment 5 has the dual effects of fixing and positioning the bottom plate 8.

[0066] See also Figure 3 to Figure 6, the connection structure is arranged on the upper shell 1, and a No. 2 sample pad 13 is connected to the connection structure, and the length of the No. 2 sample pad 13 is greater than the length of the disconnection area;

[0067] The connection structure includes a connection frame 14 connected to the second sample pad 13, a trigger shaft 15 penetrating the upper housing 1 is arranged on the connection frame 14, and the connection frame 14 is connected to the blocking assembly;

[0068] When the No. 2 sample pad 13 is separated from the No. 1 sample pad 9 , the end of the trigger shaft 15 away from the connecting frame 14 is flush with the outer surface of the upper housing 1 ;

[0069] The connection structure further includes a locking kit disposed between the upper shell 1 and the connecting frame 14, the locking kit including a convex shaft 1401 symmetrically disposed on the connecting frame 14 and an elastic frame 19 disposed on the upper shell 1, the elastic frame 19 being a "mouth" shaped structure;

[0070] Two groups of protrusions 1901 are symmetrically arranged on the inner side of the elastic frame 19 , and the protrusions 1901 can limit the convex shaft 1401 .

[0071] In the initial state, the convex shaft 1401 is located at the upper part of the upper group of protrusions 1901. At this time, the convex shaft 1401 is in a locked state. In this state, the trigger shaft 15 is flush with the upper surface of the upper shell 2, thereby preventing the connection frame 14 from moving due to accidental pressing. At the same time, in this state, the No. 2 sample pad 13 is separated from the No. 1 sample pad 9 and the colloidal gold pad 10. At this time, when external contaminants enter the No. 1 sample pad 9 from the dripping port 101 and diffuse, they will not directly enter the colloidal gold pad 10 due to capillary action, thereby avoiding external contaminants from entering the NC membrane 11, causing the NC membrane 11 to fail due to contamination.

[0072] When testing is required, the trigger shaft 15 is pressed downward by using a slender ejector pin to move the connecting frame 14 downward. At this time, the convex shaft 1401 can be separated from the upper set of protrusions 1901 and pass over the lower set of protrusions 1901 to achieve position locking. In this state, the connecting frame 14 can make the No. 2 sample pad 13 fit with the No. 1 sample pad 9 and the colloidal gold pad 10. At this time, when the liquid to be tested is added to the dripping port 101, the liquid to be tested can be spread along the No. 2 sample pad 13 and the colloidal gold pad 10 to the NC membrane 11 under the capillary action, thereby developing color.

[0073] Through the above arrangement, in the initial state, the No. 2 sample pad 13 can be separated from the No. 1 sample pad 9 and the colloidal gold pad 10, so as to prevent external contaminants from entering the No. 1 sample pad 9 from the dripping port 101 and diffusing onto the NC membrane 11, causing the NC membrane 11 to be contaminated and fail. During detection, by pressing the trigger shaft 15, the No. 2 sample pad 13 can be attached to the No. 1 sample pad 9 and the colloidal gold pad 10, and when the liquid to be detected enters the No. 1 sample pad 9, it can be diffused onto the NC membrane 11, that is, whether to perform detection can be autonomously controlled according to the use intention, thereby reducing waste.

[0074] See also Figure 3 , Figure 5 The blocking component is connected to the connecting frame 14, and the blocking component can block the dripping port 101. When the connecting structure is actuated to make the second sample pad 13 fit the detection structure, the dripping port 101 is opened;

[0075] The blocking assembly includes a guide 18 disposed on the upper shell 1, a blocking plate 17 slidably mounted in the guide 18 and slidingly fitted with the inner wall of the upper shell 1, a connecting member 16 is connected to one side of the blocking plate 17, and an end of the connecting member 16 away from the blocking plate 17 is connected to the connecting frame 14;

[0076] When the connecting frame 14 moves away from the upper housing 1, the blocking plate 17 can move along the guiding direction of the guiding member 18;

[0077] Furthermore, a conducting hole 1701 is formed on the blocking plate 17 , and when the No. 2 sample pad 13 is attached to the No. 1 sample pad 9 , the conducting hole 1701 overlaps with the dripping port 101 .

[0078] When the No. 2 sample pad 13 is separated from the No. 1 sample pad 9, the conducting hole 1701 on the blocking plate 17 is in a misaligned state with the dripping port 101. At this time, it can prevent external pollutants from entering the No. 1 sample pad 9 through the dripping port 101, and has a double protection effect. During detection, when the connecting frame 14 moves toward the lower shell 2, the connecting frame 14 will also drive the blocking plate 17 to move through the connecting piece 16, and when the No. 2 sample pad 13 is attached to the No. 1 sample pad 9, the conducting hole 1701 just coincides with the dripping port 101. At this time, when the liquid to be detected is dripped, the liquid to be detected can enter the No. 1 sample pad 9 through the dripping port 101, and diffuse along the No. 2 sample pad 13 and the colloidal gold pad 10 to the NC membrane 11.

[0079] Through the above arrangement, when the No. 2 sample pad 13 is separated from the No. 1 sample pad 9 , the dripping port 101 can be blocked, thereby producing a double protection effect and preventing external pollutants from entering the No. 1 sample pad 9 through the dripping port 101 .

[0080] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0081] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Food safety testing equipment quality control system based on colloidal gold immunoassay principle, including: An upper shell (1) and a lower shell (2), wherein the upper shell (1) is provided with a dripping port (101) and an observation window (102), and a sealing ring (3) is provided between the upper shell (1) and the lower shell (2); A bottom plate (8) is mounted on the lower housing (2), a detection structure being provided on the bottom plate (8), a disconnection area being formed in the middle of the detection structure, and a C line and a T line on the detection structure facing the observation window (102); It is characterized by further comprising: a positioning assembly, arranged on the lower shell (2), the positioning assembly comprising a positioning member (4) and an abutment structure, the positioning member (4) and the abutment structure cooperating with the bottom plate (8) to fix the bottom plate (8); A connection structure, arranged on the upper shell (1), a No. 2 sample pad (13) being connected to the connection structure, the No. 2 sample pad (13) having a length greater than a length of the disconnected area; A blocking component is connected to the connection structure, and the blocking component can block the dripping port (101). When the connection structure is actuated to make the second sample pad (13) adhere to the detection structure, the dripping port (101) is opened.

2. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 1 is characterized in that: The detection structure comprises a No. 1 sample pad (9), a colloidal gold pad (10), an NC membrane (11) and a water-absorbing filter paper (12) arranged along the length direction of the bottom plate (8), and the disconnection area is formed between the No. 1 sample pad (9) and the colloidal gold pad (10); The C line and the T line are arranged on the NC film (11).

3. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 1 is characterized in that: Arc portions are formed at both ends of the bottom plate (8); The positioning member (4) is integrally formed with the lower shell (2), and the positioning member (4) is provided with a retardation groove (401) along its length direction, the retardation groove (401) is in an arc-like shape, and the radius of the retardation groove (401) is the same as the radius of the arc portion; A No. 1 inclined guide surface (402) is formed on each of the two side edges of the retardation groove (401), and the two No. 1 inclined guide surfaces (402) are capable of guiding the bottom plate (8).

4. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 3 is characterized in that: The abutment structure comprises a stop block (7) formed integrally with the lower shell (2), an elastic member (6) being arranged on the stop block (7), and an end of the elastic member (6) away from the stop block (7) being connected to the abutment member (5); A second inclined guide surface (501) and a groove (502) are provided at one end of the abutment member (5) away from the stop block (7); the circumferential radius of the groove (502) is the same as the circumferential radius of the circular arc portion.

5. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 2 is characterized in that: The connection structure comprises a connection frame (14) connected to the second sample pad (13), a trigger shaft (15) penetrating the upper shell (1) is arranged on the connection frame (14), and the connection frame (14) is connected to the blocking assembly; When the No. 2 sample pad (13) is separated from the No. 1 sample pad (9), the end of the trigger shaft (15) away from the connecting frame (14) is flush with the outer surface of the upper shell (1); The connection structure also includes a locking kit arranged between the upper shell (1) and the connection frame (14).

6. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 5 is characterized in that: The locking kit comprises a convex shaft (1401) symmetrically arranged on the connecting frame (14) and an elastic frame (19) arranged on the upper shell (1), wherein the elastic frame (19) is in a "mouth"-shaped structure; Two groups of protrusions (1901) are symmetrically arranged on the inner side of the elastic frame (19), and the protrusions (1901) are capable of limiting the position of the convex shaft (1401).

7. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 5 is characterized in that: The blocking assembly comprises a guide member (18) arranged on the upper shell (1), a blocking plate (17) slidably mounted in the guide member (18) and slidably fitted with the inner wall of the upper shell (1), a connecting member (16) being connected to one side of the blocking plate (17), and an end of the connecting member (16) away from the blocking plate (17) being connected to the connecting frame (14); When the connecting frame (14) moves away from the upper shell (1), the blocking plate (17) can move along the guiding direction of the guiding member (18).

8. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 7 is characterized in that: A conducting hole (1701) is formed on the blocking plate (17), and when the No. 2 sample pad (13) is attached to the No. 1 sample pad (9), the conducting hole (1701) overlaps with the dripping port (101).

9. The food safety testing equipment quality control system based on the colloidal gold immunoassay principle according to claim 1, characterized in that: The upper shell (1) is provided with a connecting shaft (20), and the lower shell (2) is provided with a connecting sleeve (21), and the connecting shaft (20) is adapted to fit the connecting sleeve (21).

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