Sampling cup

Abstract

The present invention provides a sampling cup, which relates to the technical field of medical instruments. The sampling cup comprises: a sampling rod, a cup body, an inner tube and a liquid injection mechanism, wherein a sampling head is arranged on the sampling rod; a first cavity is arranged in the cup body; the inner tube is connected to the cup body and is located in the first cavity; a second cavity and an opening connecting the second cavity and the outside are arranged on the inner tube; when the sampling rod and the inner tube are plugged into place, the sampling head abuts against an abutting surface on the inner wall of the inner tube; a first guide hole and a second guide hole connecting the first cavity and the second cavity are arranged on the side wall of the inner tube, the first guide hole is located on the abutting surface, and the second guide hole is located between the opening and the abutting surface; the liquid injection mechanism has a liquid outlet; the liquid injection mechanism is connected to the sampling rod, and a sealing member is arranged on the outer wall of the sampling rod and / or the inner wall of the inner tube.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a sampling cup. Background Art

[0002] In the field of in vitro diagnostic testing, saliva can be used to monitor diseases and human health. Saliva testing is widely used for its advantages of simplicity, speed, sensitivity and high sensitivity. However, saliva samples have high viscosity. Since the mucus protein in saliva is viscous, it increases the surface tension of saliva and reduces the fluidity of saliva, making it difficult for saliva samples to be smoothly chromatographed on the test strip or the chromatography speed is slow, affecting the accuracy of the test;

[0003] When multiple indicators need to be tested, the amount of saliva collected increases exponentially. Although this can be achieved by extending the saliva collection time, it is very difficult for people with xerostomia because they secrete very little saliva. During saliva testing, it is impossible to collect enough saliva samples for testing, which affects the accuracy of the test results. Summary of the invention

[0004] The object of the present invention is to provide a sampling cup to alleviate the technical problem of insufficient sampling volume and inaccurate detection results in the existing sample sampling process.

[0005] The present invention provides a sampling cup, comprising:

[0006] A sampling rod, wherein a sampling head is arranged on the sampling rod;

[0007] The cup body has a first cavity inside the cup body, and the first cavity is used to place the test element; at least a part of the cup body is transparent to observe the test element;

[0008] The inner cylinder is connected to the cup body and is located in the first cavity; the inner cylinder is provided with a second cavity and an opening connecting the second cavity and the outside, and the opening is used to insert the sampling head into the second cavity; when the sampling rod and the inner cylinder are plugged into place, the sampling head abuts against the abutting surface on the inner wall of the inner cylinder; the side wall of the inner cylinder is provided with a first flow guide hole and a second flow guide hole connecting the first cavity and the second cavity, the first flow guide hole is located on the abutting surface, and the second flow guide hole is located between the opening and the abutting surface;

[0009] The liquid injection mechanism has a liquid outlet; the liquid injection mechanism is connected to the sampling rod, and a sealing member is provided on the outer wall of the sampling rod and / or the inner wall of the inner tube, so that when the sampling rod and the inner tube are plugged into place, a guide channel exists between the circumferential side wall of the sampling rod and the circumferential inner wall of the inner tube, and the sealing member divides the guide channel into a first area and a second area, the first guide hole and the sampling head are located in the first area, and the second guide hole and the liquid outlet of the liquid injection mechanism are located in the second area.

[0010] Furthermore, the liquid injection mechanism includes a transition tube, a puncture structure and a liquid storage shell, wherein the puncture structure is located at the bottom of the transition tube; the liquid outlet is arranged on the transition tube and communicates with the inside and outside of the transition tube;

[0011] The liquid storage shell stores a buffer solution inside, and the liquid storage shell is provided with an outlet communicating with the inside and the outside, and the outlet is sealed by a sealing film;

[0012] A portion of the liquid storage shell is slidably connected to the interior of the transition tube through the opening of the transition tube, and a portion is located outside the opening of the transition tube, so that the puncture structure can puncture the sealing membrane and allow the buffer to flow out from the liquid outlet.

[0013] Furthermore, the liquid injection mechanism includes a cup cover, the cup cover includes a top plate, and the top plate is provided with a mounting hole connecting the upper and lower surfaces thereof;

[0014] A skirt is provided below the top plate, and the skirt is used to connect with the inner tube;

[0015] An annular tube is arranged on the radial inner side of the skirt, and the mounting hole and the puncture structure are both located on the radial inner side of the annular tube; the annular tube is plugged into the inner side of the opening of the transition tube;

[0016] The liquid storage shell is slidably connected with the mounting hole.

[0017] Furthermore, a first thread is provided on the skirt;

[0018] The open end of the inner tube is provided with a second thread connected with the skirt thread.

[0019] Furthermore, the liquid injection mechanism includes a protective cover, which is buckled on the outer side of the liquid storage shell, and the open end of the protective cover is in contact with the top plate to prevent the liquid storage shell from being accidentally triggered.

[0020] Furthermore, a protrusion is provided on the circumferential outer wall of the liquid storage shell, and the protrusion is used to abut against the hole wall of the mounting hole when the liquid storage shell is in an unfired state;

[0021] And / or, a convex rib extending along the plugging direction is arranged on the inner wall of the transition tube.

[0022] Furthermore, the transition tube and the sampling rod are integrally formed.

[0023] Furthermore, a slot for installing a bracket is provided inside the cup body, and the bracket is used to fix the test element.

[0024] Furthermore, the number of the test elements is at least two, and at least two of the test elements test different items.

[0025] Furthermore, the sampling rod has a cavity inside, a saturation indicating element is arranged in the cavity, and the distal end of the sampling rod has an opening to connect the saturation indicating element to the sampling head; the side wall of the cavity is transparent.

[0026] The present invention has at least the following advantages or beneficial effects:

[0027] The present invention provides a sampling cup, comprising: a sampling rod, a cup body, an inner tube and a liquid injection mechanism, wherein a sampling head is arranged on the sampling rod; a first cavity is arranged in the cup body, and the first cavity is used to place a test element; at least a part of the cup body is transparent to observe the test element; the inner tube is connected to the cup body and is located in the first cavity; a second cavity and an opening connecting the second cavity and the outside are arranged on the inner tube, and the opening is used to allow the sampling head to be inserted into the second cavity; when the sampling rod and the inner tube are plugged into place, the sampling head abuts against an abutting surface on the inner wall of the inner tube; a connecting surface connecting the first cavity and the second cavity is arranged on the side wall of the inner tube The cavity has a first guide hole and a second guide hole, the first guide hole is located on the abutting surface, and the second guide hole is located between the open opening and the abutting surface; the injection mechanism has a liquid outlet; the injection mechanism is connected to the sampling rod, and a sealing member is provided on the outer wall of the sampling rod and / or the inner wall of the inner tube, so that when the sampling rod and the inner tube are plugged into place, there is a guide channel between the circumferential side wall of the sampling rod and the circumferential inner wall of the inner tube, and the sealing member divides the guide channel into a first area and a second area, the first guide hole and the sampling head are located in the first area, and the second guide hole and the liquid outlet of the injection mechanism are located in the second area.

[0028] When in use, the sampling head of the sampling rod absorbs the test sample and takes it out after a period of time. The sampling rod is inserted into the inner cylinder, and the sampling head abuts against the abutment surface of the inner cylinder during the downward pressing process. The test sample collected in the sampling head is squeezed out and then enters the first area through the first guide hole. The seal prevents the test sample from entering the second area. Under the action of pressure, the test sample flows into the first cavity along the first guide hole and contacts the root of the test element to start the test. Then the injection mechanism is started, the buffer is injected into the second area, and then flows into the first cavity through the second guide hole. The test sample adsorbed on the test element is pushed by the subsequent buffer and continues to flow upward, so that the limited test sample can be used more for testing, thereby ensuring the accuracy of the test. The sampling cup releases the test sample first and then releases the buffer solution. The physical driving force generated by the release of the buffer solution accelerates the chromatography of the test sample. At the same time, the buffer solution can also flush the saliva sample in the inner cylinder. The buffer solution with the test sample runs the plate twice, which improves the utilization rate of the test sample. Even people with a small amount of test sample sampling can successfully test. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a sampling cup provided in an embodiment of the present invention;

[0031] Figure 2 An exploded view of a sampling cup provided by an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the internal structure of a cup body of a sampling cup provided by an embodiment of the present invention;

[0033] Figure 4 A cross-sectional view of the inner cylinder of the sampling cup provided by an embodiment of the present invention;

[0034] Figure 5 A cross-sectional view of a sampling rod of a sampling cup provided by an embodiment of the present invention;

[0035] Figure 6 A cross-sectional view of a cover of a sampling cup provided by an embodiment of the present invention;

[0036] Figure 7 A schematic diagram of a liquid storage shell of a sampling cup provided in an embodiment of the present invention;

[0037] Figure 8 A cross-sectional view of a sampling cup provided in an embodiment of the present invention.

[0038] Icons: 11-cup body; 12-inner tube; 13-test element; 14-bracket; 21-sampling rod; 22-sampling head; 23-saturation indicator element; 24-seal; 25-cup cover; 251-mounting hole; 26-liquid storage shell; 27-sealing film; 28-protective cover; 29-sealing plate; 121-first guide hole; 112-guide groove; 122-second guide hole; 213-annular groove; 214-transition tube; 215-liquid outlet; 111-slot; 123-external thread; 211-cavity; 212-groove; 253-skirt; 252-annular tube; 261-protrusion; 216-puncture structure; 217-convex rib. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] like Figure 1 - Figure 8 As shown, the sampling cup provided by the present invention can be used for but is not limited to extracting saliva.

[0046] like Figure 2 , Figure 3 and Figure 8As shown, the sampling cup includes: a sampling rod 21, a cup body 11, an inner tube 12 and a liquid injection mechanism. The sampling rod 21 and the liquid injection mechanism can be assembled into a first integral component; the cup body 11 and the inner tube 12 can be assembled into a second integral component. When in use, the user can hold the first integral component with one hand and the second integral component with the other hand.

[0047] Specifically, a sampling head 22 is provided at the distal end of the sampling rod 21, wherein the distal end is the end away from the operator, and the proximal end is the end close to the operator. Figure 5 As shown, the distal end of the sampling rod 21 may have a groove 212 for accommodating the sampling head 22, which is used to position and accommodate the sampling head 22; the sampling head 22 and the sampling rod 21 may be connected by welding.

[0048] like Figure 5 As shown, the sampling rod 21 has a hollow structure, and a cavity 211 is arranged inside it. The material is transparent, which is convenient for observing the internal situation. The distal end of the sampling rod 21 has an opening connected to the groove 212. A saturation indicator element 23 is arranged in the cavity 211. The distal end of the saturation indicator element 23 is connected to the sampling head 22 through the opening at the distal end of the sampling rod 21. The volume of the test sample sucked by the sampling head 22 can be reflected on the saturation indicator element 23. When the operator collects the test sample, he can observe the saturation indicator element 23 through the transparent outer wall of the sampling rod 21, so as to judge whether the collection is completed.

[0049] like Figure 5 and Figure 8 As shown, an annular groove 213 may be provided on the outer wall of the sampling rod 21, and a sealing member 24 may be provided in the annular groove 213, wherein the sealing member 24 may be a sealing ring or a sealing strip, and when the sampling rod 21 and the inner cylinder 12 are plugged into place, the sealing member 24 abuts against the inner wall of the inner cylinder 12 and forms a seal to prevent the test sample overflowing from the sampling head 22 from flowing upward. In other practicable solutions, the sealing member 24 may also be provided on the inner wall of the inner cylinder 12. The plugged into place means that the sampling rod 21 is fully inserted into the inner cylinder 12 and cannot be inserted further.

[0050] like Figure 3 and Figure 8As shown, the cup body 11 has an opening at the top, and has a first cavity therein. A card slot 111 is provided in the first cavity. The card slot 111 is used to install the bracket 14. The test element 13 is fixed on the bracket 14. During assembly, the test element 13 can be first installed on the bracket 14, and then the bracket 14 is inserted into the card slot 111. The card slot 111 plays a fixing role, and the bracket 14 is fixed relative to the cup body 11. In this embodiment, card slots 111 are provided on opposite sides of the cup body 11, so that at least two brackets 14 can be accommodated in the cup body 11, and a guide groove 112 connecting the two card slots 111 can be provided between the two brackets 14. The guide groove 112 is directly opposite to the first guide hole 121 of the inner cylinder 12, and the test sample flowing out of the inner cylinder 12 directly falls into the guide groove 112 ( Figure 8 The guide groove 112 guides the test sample to the two brackets 14, so that the test elements 13 on the two brackets 14 can absorb the test sample.

[0051] At least a part of the cup body 11 is transparent, and the transparent area faces the test element 13, so as to observe the change of the test element 13. For the convenience of preparation, in this embodiment, the whole cup body 11 can be set to be transparent.

[0052] like Figure 4 As shown, a sealing plate 29 protruding radially outward is provided on the outer wall of the inner cylinder 12, and the sealing plate 29 is connected to the top opening of the cup body 11 and closes the top opening of the cup body 11. The inner cylinder 12 is located in the first cavity.

[0053] The inner cylinder 12 is provided with a second cavity and an opening connecting the second cavity and the outside. The opening is used to insert the sampling head 22 into the second cavity. The inner diameter of the second cavity is smaller than the outer diameter of the sealing member 24. When the sampling rod 21 and the inner cylinder 12 are plugged into place, the sampling head 22 abuts against the abutting surface on the inner wall of the inner cylinder 12. The abutting surface is the distal end surface of the inner cylinder 12. When the sampling rod 21 is inserted into the inner cylinder 12, the abutting surface is pressed against the sampling head 22, thereby squeezing out the test sample contained in the sampling head 22 and flowing into the first cavity through the first flow guide hole 121 on the inner cylinder 12, thereby contacting the test element 13.

[0054] The second flow guide hole 122 on the inner tube 12 is located between the open opening and the abutting surface, and when the sampling rod 21 is inserted into place, the sealing member 24 separates the first flow guide hole 121 and the second flow guide hole 122 .

[0055] The liquid injection mechanism has a liquid outlet 215 . When the sampling rod 21 is inserted into place, a part of the liquid injection mechanism also penetrates into the inner tube 12 , and the liquid outlet 215 is located inside the inner tube 12 .

[0056] When the sampling rod 21 and the inner tube 12 are plugged into place, there is a flow guide channel between the circumferential side wall of the sampling rod 21 and the circumferential inner wall of the inner tube 12, and the buffer solution flowing out of the injection mechanism can enter the flow guide channel. The seal 24 divides the flow guide channel into a first area and a second area separated by an upper and lower interval. The first flow guide hole 121 and the sampling head 22 are located in the first area, and the seal 24 prevents the test sample from entering the second area. The second flow guide hole 122 and the liquid outlet 215 of the injection mechanism are located in the second area, and the seal 24 prevents the buffer solution from entering the first area.

[0057] like Figure 5 As shown, the injection mechanism includes a transition tube 214, a puncture structure 216 and a liquid storage shell 26. The transition tube 214 can be integrally formed with the proximal end of the sampling rod 21. The opening of the transition tube 214 faces the proximal end, the puncture structure 216 is located at the bottom of the distal end of the transition tube 214, and the tip of the puncture structure 216 faces the opening side of the transition tube 214. The liquid outlet 215 is arranged at the distal end of the transition tube 214, and is connected to the inside and outside of the transition tube 214 to ensure that the buffer solution flowing into the transition tube 214 can flow out from the bottom thereof into the second area. The liquid storage shell 26 stores buffer solution inside, and an outlet connecting the inside and outside thereof is arranged on the distal end face of the liquid storage shell 26, and the outlet is sealed by a sealing film 27, as shown in FIG. Figure 8 As shown, the sealing film 27 can be an aluminum foil film. A portion of the liquid storage shell 26 is slidably connected to the inside of the transition tube 214 through the opening at the proximal end of the transition tube 214, and a portion is located outside the opening of the transition tube 214. The user can press the liquid storage shell 26 inward to allow the puncture structure 216 to puncture the sealing film 27 and allow the buffer to flow from the liquid outlet 215 into the transition tube 214, and then flow into the second area of ​​the inner tube 12 through the liquid outlet 215 on the transition tube 214, and finally enter the first cavity through the second guide hole 122 to contact the test element 13. The buffer route is as shown in FIG. Figure 8 Implementation arrow direction in .

[0058] like Figure 4 and Figure 6 As shown, the liquid injection mechanism includes a cup cover 25, and the cup cover 25 includes a top plate, and a mounting hole 251 is provided on the top plate to connect the upper and lower surfaces thereof, and the mounting hole 251 is for the liquid storage shell 26 to pass through. A cylindrical skirt 253 is provided below the top plate, and the skirt 253 is used to connect with the inner cylinder 12. Preferably, the skirt 253 and the inner cylinder 12 can be connected by a thread. Specifically, an internal thread is provided on the skirt 253, and an external thread 123 threadedly connected to the skirt 253 is provided at the open portion of the inner cylinder 12, and a portion of the external thread 123 is located on the outside of the sealing plate 29. Rotating the cup cover 25 can make the sampling head 22 squeeze the abutment surface at the bottom of the inner cylinder 12, so that the test sample can be squeezed out faster.

[0059] An annular tube 252 is provided on the radial inner side of the skirt 253, and the mounting hole 251 and the puncture structure 216 are both located on the radial inner side of the annular tube 252. During assembly, the annular tube 252 is plugged into the inner side of the opening of the transition tube 214, and the two can be connected together by interference fit. The liquid storage shell 26 is slidably connected to the mounting hole 251, and in order to allow the liquid storage shell 26 to slide in a directional manner, such as Figure 7 As shown, an annular protrusion is also provided on the circumferential outer wall of the liquid storage shell 26, and the annular protrusion is in sliding contact with the inner wall of the annular cylinder 252, thereby playing a guiding and limiting role.

[0060] The injection mechanism includes a protective cover 28, which is buckled on the outside of the liquid storage shell 26, and the open end of the protective cover 28 is in contact with the top plate to prevent the liquid storage shell 26 from being accidentally triggered. During the sampling process, the protective cover 28 is always buckled on the outside of the liquid storage shell 26, and the protective cover 28 needs to be removed before the buffer solution needs to be injected.

[0061] like Figure 7 As shown, a protrusion 261 is provided on the circumferential outer wall of the liquid storage shell 26. The protrusion 261 is used to abut against the hole wall of the mounting hole when the liquid storage shell 26 is in an unfired state (the state when sold) to increase the friction force, thereby stabilizing the liquid storage shell 26 and preventing the liquid storage shell 26 from contacting the puncture structure 216 in advance.

[0062] like Figure 5 As shown, during assembly, the transition tube 214 needs to be inserted between the annular tube 252 and the skirt 253, and the inner wall of the transition tube 214 is in contact with the outer wall of the annular tube 252. In order to reduce friction and facilitate insertion, a convex rib 217 extending along the plug-in direction is provided on the inner wall of the transition tube 214 to reduce the contact area.

[0063] The number of the test elements 13 is at least two, and at least two test elements 13 test different items.

[0064] like Figure 8 As shown, taking saliva testing as an example, when in use, the sampling head 22 of the sampling rod 21 is held in the mouth to absorb the saliva sample and is taken out after 1 minute. The sampling rod 21 is inserted into the inner cylinder 12. During the rotation and downward pressing of the sampling rod 21, the saliva sample collected in the sampling head 22 is squeezed into the inner cylinder 12. The sealing member 24 seals the second area on the upper part of the inner cylinder 12. Under the action of pressure, the saliva flows along the first guide hole 121 into the guide groove 112 in the cup body 11, and flows to both sides to the root of the test element 13, and the test begins.

[0065] Open the protective cover 28, press the liquid storage shell 26, the sealing film 27 is punctured by the puncture structure 216, and the buffer solution flows out of the liquid storage shell 26, passes through the transition cylinder 214 and the liquid outlet 215 in sequence, and flows into the second area inside the inner cylinder 12. The buffer solution then flows into the cup body 11 through the second guide hole 122, pushing the existing saliva sample for testing.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sampling cup, characterized in that: include: A sampling rod (21), wherein a sampling head (22) is provided on the sampling rod (21); A cup body (11), wherein the cup body (11) has a first cavity therein, and the first cavity is used to place a test element (13); at least a part of the cup body (11) is transparent so as to observe the test element (13); An inner cylinder (12), the inner cylinder (12) being connected to the cup body (11) and being located in the first cavity; the inner cylinder (12) being provided with a second cavity and an opening communicating the second cavity with the outside, the opening being used for inserting the sampling head (22) into the second cavity; when the sampling rod (21) and the inner cylinder (12) are plugged into place, the sampling head (22) abuts against an abutting surface on the inner wall of the inner cylinder (12); a first flow guide hole (121) and a second flow guide hole (122) communicating the first cavity and the second cavity are provided on the side wall of the inner cylinder (12), the first flow guide hole (121) being located on the abutting surface, and the second flow guide hole (122) being located between the opening and the abutting surface; The invention relates to a liquid injection mechanism, wherein the liquid injection mechanism has a liquid outlet (215); the liquid injection mechanism is connected to the sampling rod (21), and a sealing member (24) is provided on the outer wall of the sampling rod (21) and / or the inner wall of the inner tube (12), so that when the sampling rod (21) and the inner tube (12) are plugged into place, a guide channel exists between the circumferential side wall of the sampling rod (21) and the circumferential inner wall of the inner tube (12), and the sealing member (24) divides the guide channel into a first area and a second area, the first guide hole (121) and the sampling head (22) are located in the first area, and the second guide hole (122) and the liquid outlet (215) of the liquid injection mechanism are located in the second area.

2. The sampling cup according to claim 1, characterized in that: The liquid injection mechanism comprises a transition tube (214), a puncture structure (216) and a liquid storage shell (26), wherein the puncture structure (216) is located at the bottom of the transition tube (214); the liquid outlet (215) is arranged on the transition tube (214) and communicates with the inside and outside of the transition tube (214); The liquid storage shell (26) stores a buffer solution inside, and the liquid storage shell (26) is provided with an outlet communicating with the inside and outside thereof, and the outlet is sealed by a sealing film (27); A portion of the liquid storage shell (26) is slidably connected to the interior of the transition cylinder (214) through the opening of the transition cylinder (214), and a portion is located outside the opening of the transition cylinder (214), so that the puncture structure (216) can puncture the sealing membrane (27) and allow the buffer solution to flow out from the liquid outlet (215).

3. The sampling cup according to claim 2, characterized in that: The liquid injection mechanism comprises a cup cover (25), the cup cover (25) comprises a top plate, and a mounting hole (251) is provided on the top plate connecting the upper and lower surfaces thereof; A skirt (253) is provided below the top plate, and the skirt (253) is used to be connected to the inner cylinder (12); An annular tube (252) is provided on the radial inner side of the skirt (253); the mounting hole (251) and the puncture structure (216) are both located on the radial inner side of the annular tube (252); the annular tube (252) is plugged into the inner side of the opening of the transition tube (214); The liquid storage shell (26) is slidably connected to the mounting hole (251).

4. The sampling cup according to claim 3, characterized in that: The skirt (253) is provided with a first thread; The open portion of the inner tube (12) is provided with a second thread which is threadably connected to the skirt (253).

5. The sampling cup according to claim 3, characterized in that: The liquid injection mechanism comprises a protective cover (28), the protective cover (28) being buckled on the outside of the liquid storage shell (26), and the open end of the protective cover (28) being in contact with the top plate to prevent the liquid storage shell (26) from being triggered by mistake.

6. The sampling cup according to claim 3, characterized in that: A protrusion is provided on the circumferential outer wall of the liquid storage shell (26), and the protrusion is used to abut against the hole wall of the mounting hole when the liquid storage shell (26) is in an unfired state; And / or, a convex rib (217) extending along the plugging direction is provided on the inner wall of the transition tube (214).

7. The sampling cup according to claim 2, characterized in that: The transition tube (214) and the sampling rod (21) are integrally formed.

8. The sampling cup according to any one of claims 1 to 7, characterized in that: A slot (111) for mounting a bracket (14) is provided inside the cup body (11), and the bracket (14) is used to fix the test element (13).

9. The sampling cup according to claim 8, characterized in that: The number of the test elements (13) is at least two, and at least two test elements (13) test different items.

10. The sampling cup according to any one of claims 1 to 7, characterized in that: The sampling rod (21) has a cavity (211) inside, a saturation indicating element (23) is arranged in the cavity (211), and the distal end of the sampling rod (21) has an opening so that the saturation indicating element (23) is connected to the sampling head (22); the side wall of the cavity (211) is transparent.

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