초록 ▼

Disclosed is a mating structure of a liquid extraction piece and a test tube assembly, which comprises the liquid extraction piece (1) and the test tube assembly (4). A test tube plug (2) is arranged at an opening end (32) of a test tube (3). The lower portion of the liquid extraction piece (1) is m

Disclosed is a mating structure of a liquid extraction piece and a test tube assembly, which comprises the liquid extraction piece (1) and the test tube assembly (4). A test tube plug (2) is arranged at an opening end (32) of a test tube (3). The lower portion of the liquid extraction piece (1) is mated with the test tube assembly (4). The body of the test tube plug (2) is provided with a blocking body (25). The blocking body (25) is provided with a movable portion (253) and a fixed portion (252). The movable portion (253) can move with respect to the fixed portion (252). An axial recess is arranged above an upper surface (251) of the movable portion (253). The lower portion of the liquid extraction piece (1) is mated with the recess. The blocking body (25) is located in a lumen (31) of the test tube (3).

대표청구항 ▼

1. A combined structure of a liquid collector with a test tube assembly, comprising a liquid collector and a test tube assembly, wherein the test tube assembly includes a test tube and a tube plug placed at an opening end of the test tube, an axial passage is formed in the liquid collector, and a lo

1. A combined structure of a liquid collector with a test tube assembly, comprising a liquid collector and a test tube assembly, wherein the test tube assembly includes a test tube and a tube plug placed at an opening end of the test tube, an axial passage is formed in the liquid collector, and a lower part of the liquid collector is connected to the test tube assembly, wherein, the tube plug includes barriers, each of which includes a fixed part and a movable part extending from the fixed part toward the inside of the test tube, and the movable part is deflectable relative to the fixed part and includes an upper face, a lower face and a lateral side face connecting the upper and lower faces; wherein an axial recess is formed above the upper face of the movable part and surrounded by the upper faces of the moveable parts and an inner wall of a first passage above the upper face of the movable part, the lower part of the liquid collector fits in the axial recess, the lower part of the liquid collector is inserted in the first passage, and an outer surface of the lower part of the liquid collector matches with and fixedly attached to the inner wall of the first passage, and wherein the lower part of the liquid collector passes through the recess of the tube plug and abuts against the movable parts so that the movable parts are deflected downwards and outwards, the barriers are positioned in a cavity of the test tube, and a lower opening of the axial passage of the liquid collector is positioned in the cavity of the test tube and is lower than or at the same level as the lowest point of the lower part of the tube plug;wherein the first passage is used for the fixed connection to the liquid collector, eliminating the releasing of the cooperation between the test tube assembly and the liquid collector, preventing the liquid at the connection between the liquid collector and the test tube assembly from dropping outside of the test tube assembly when the liquid collector is separated from the test tube assembly, and preventing liquid from being carried by the test stripe and dropping outside of the test tube assembly when the test stripe is pulled out of the test tube, and is further used as a guide for the liquid collector being connected to the test tube assembly. 2. The combined structure of claim 1, wherein the lower part of the liquid collector includes a portion A and a portion B, a bottom of the portion A shrinks and is connected to the portion B, an outer surface of the portion A matches the wall of the first passage, and an outer surface of the portion B abuts against the upper faces of the movable parts. 3. The combined structure of claim 2, wherein the portion B has an outer diameter no less than 5.5 mm and no more than 11 mm at a point abutting against the upper faces of the movable parts. 4. The combined structure of claim 1, wherein when the lower opening of the axial passage of the liquid collector is lower than the lowest point of the lower part of the tube plug, the lower opening is lower than the lowest point of the lower part of the tube plug by at least 1 mm but no more than 20 mm. 5. The combined structure of claim 4, wherein the portion B has an outer diameter no less than 5.5 mm and no more than 11 mm at a point abutting against the upper faces of the movable parts. 6. The combined structure of claim 5, wherein the height of the tube plug in the tube cavity of the test tube is no less than 5% and no more than 20% of the height of the tube cavity of the test tube, or no less than 8% and no more than 16% of the height of the tube cavity of the test tube. 7. The combined structure of claim 1, wherein the cavity of the test tube has a height no less than 90 mm and no more than 115 mm, and the lower opening of the axial passage of the liquid collector is spaced from the opening of the test tube by no less than 5% of the height of the cavity of the test tube and no more than 35% of the height of the cavity of the test tube. 8. The combined structure of claim 7, wherein a shielding body is arranged around the lower opening of the axial passage of the liquid collector and configured to prevent liquid outside of the passage of the liquid collector from spurting onto the outer surface of the test tube, a shielding wall of the shielding body surrounds the test tube by an angle no more than 360°, and the shielding body has a height no less than 70% of the height of the test tube. 9. The combined structure of claim 1, wherein a protection side wall is arranged around a handle of the liquid collector and configured for preventing liquid from sputtering on the handle. 10. The combined structure of claim 1, wherein upon completion of liquid collecting, after the residual liquid in the liquid collector is poured out and the liquid collector is separated from the test tube assembly, a liquid level in the test tube is spaced from the lowest point of the lower part of the tube plug by a distance no less than 3.5 mm and no more than 15 mm, or no less than 4.5 mm and no more than 12.5 mm. 11. The combined structure of claim 1, wherein in an initial state, the lower part of the liquid collector matches with and is fixedly attached to the test tube assembly, an outer surface of the lower part of the liquid collector matches an inner wall of the first passage, a liquid outlet of the liquid collector is positioned above the upper faces of the movable parts of the barriers, and the movable parts of the barriers are not deflected; and in a use state, the lower part of the liquid collector abuts against the movable parts of the barriers of the tube plug, so that the movable parts are deflected downwards and outwards, and the outer surface of the lower part of the liquid collector abuts on the upper faces of the movable parts. 12. The combined structure of claim 1, wherein a partition part is arranged in the axial passage of the liquid collector to separate the axial passage into a liquid guide passage and an air exhaust passage insulated from the liquid guide passage, the smallest cross-section of the liquid guide passage has an area no less than 3 mm2 and no more than 18 mm2, and the smallest cross-section of the air exhaust passage has an area no less than 3 mm2 and no more than 18 mm2; and wherein the liquid in the test tube assembly is prevented from leaking both when the residual liquid in the liquid collector is poured out upon completion of liquid collecting and after the liquid collector is separated from the test tube assembly. 13. The combined structure of claim 12, wherein when the smallest cross-section of the liquid guide passage has an area more than 10 mm2, the smallest cross-section of the air discharge passage has an area no less than 25% of the area of the smallest cross-section of the liquid guide passage, so that the liquid can be guided smoothly and fast by the liquid collector during liquid collecting. 14. The combined structure of claim 1, wherein in an initial state, the test tube assembly is separated from the liquid collector; and to collect liquid, the liquid collector is fixedly attached to the test tube assembly, so that the outer surface of the lower part of the liquid collector matches with the inner wall of the first passage of the tube plug, the lower part of the liquid collector abuts against the upper faces of the movable parts of the barriers of the tube plug so that the movable parts are deflected downwards and outwards, the outer surface of the lower part of the liquid collector tightly matches with both the inner wall of the first passage and the upper faces of the movable parts, and the liquid outlet of the liquid collector is in communication with the tube cavity of the test tube. 15. The combined structure of claim 1, wherein in an initial state, the liquid collector matches with and fixedly attached to the test tube assembly in such a way that the outer surface of the lower part of the liquid collector matches with the inner wall of the first passage of the tube plug and abuts against the upper faces of the movable parts of the barriers of the tube plug so that the movable parts are deflected downwards and outwards, and the liquid outlet of the liquid collector is in communication with the tube cavity of the test tube; and wherein the lower opening of the axial passage of the liquid collector is not higher than the lowest point of the lower part of the tube plug, and upon completion of liquid collecting, the residual liquid in the liquid collector is poured out and the liquid collector is separated from the test tube assembly, leaving the test tube assembly to be used by testing devices or testers. 16. The combined structure of claim 1, wherein the outer surface of the lower part of the liquid collector cooperates with the second annular protrusion arranged on the inner wall of the first passage; or the outer surface of the lower part of the liquid collector matches with both the inner wall of the first passage and the second annular protrusion arranged on the inner wall of the first passage; or the first annular recess on the outer surface of the lower part of the liquid collector cooperates with the second annular protrusion arranged on the inner wall of the first passage of the tube plug, and the outer surface of the lower part of the liquid collector abuts on the upper faces of the movable parts, wherein the second annular protrusion is configured for sealing for cooperation with the lower part of the liquid collector and improving the stability of the cooperation. 17. The combined structure of claim 1, wherein the first annular protrusion is arranged on the outer surface of the lower part of the liquid collector and matches with the second annular recess arranged on the inner wall of the first passage, and the outer surface of the lower part of the liquid collector matches with the inner wall of the first passage and abuts on the upper faces of the movable parts. 18. The combined structure of claim 1, wherein an annular protrusion is arranged on the outer wall of the tube plug and configured to cooperate with an annular recess arranged on the inner wall of the test tube. 19. The combined structure of claim 1, wherein the height of the tube plug in the tube cavity of the test tube is no less than 5% and no more than 20% of the height of the tube cavity of the test tube, or no less than 8% and no more than 16% of the height of the tube cavity of the test tube.