MATING STRUCTURE OF LIQUID EXTRACTION PIECE AND TEST TUBE ASSEMBLY

Abstract

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).

Claims

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 deeded 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 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. (canceled)

3. (canceled)

4. (canceled)

5. 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.

6. The combined structure of claim 5, 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.

7. 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.

8. (canceled)

9. The combined structure of claim 7, 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.

10. 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.

11. (canceled)

12. The combined structure of claim 10, 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.

13. 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.

14. The combined structure of claim 9, 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.

15. 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.

16. 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.

17. 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 mm.sup.2 and no more than 18 mm.sup.2, and the smallest cross-section of the air exhaust passage has an area no less than 3 mm.sup.2 and no more than 18 mm.sup.2; 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.

18. 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.

19. 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.

20. 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.

21. 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.

22. 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.

23. 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.

24. The combined structure of claim 17, wherein when the smallest cross-section of the liquid guide passage has an area more than 10 mm.sup.2, 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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0073] FIG. 1 schematically shows a test tube according to an embodiment of the present invention.

[0074] FIG. 2 schematically shows a liquid collector according to an embodiment of the present invention.

[0075] FIG. 3 schematically shows a combined structure according to an embodiment of the present invention.

[0076] FIG. 4 schematically shows a combined structure according to another embodiment of the present invention.

[0077] FIG. 5 schematically shows a liquid collector according to another embodiment of the present invention.

[0078] FIG. 6 schematically shows a combined structure according to still another embodiment of the present invention.

[0079] FIG. 7 schematically shows a liquid collector according to still another embodiment of the present invention.

[0080] FIG. 8 schematically shows a combined structure according to yet another embodiment of the present invention.

[0081] FIG. 9 schematically shows a liquid collector according to yet another embodiment of the present invention.

[0082] FIG. 10 schematically shows a tube plug according to an embodiment of the present invention.

[0083] FIG. 11 schematically shows a tube plug according to another embodiment of the present invention.

[0084] FIG. 12 schematically shows a tube plug according to still another embodiment of the present invention.

[0085] FIG. 13 schematically shows a test tube assembly according to an embodiment of the present invention.

[0086] FIG. 14 schematically shows a test tube assembly according to another embodiment of the present invention.

[0087] FIG. 15 schematically shows a test tube assembly according to still another embodiment of the present invention.

[0088] FIG. 16 schematically shows a test tube according to another embodiment of the present invention.

[0089] FIG. 17 schematically shows a tube plug according to yet another embodiment of the present invention.

[0090] FIG. 18 schematically shows a test tube assembly according to yet another embodiment of the present invention.

[0091] FIG. 19 schematically shows a liquid collector according to yet another embodiment of the present invention.

[0092] FIG. 20 schematically shows a combined structure according to yet another embodiment of the present invention.

[0093]

TABLE-US-00001 List of reference numerals  1: Liquid collector  10: Lower part of liquid collector 101: Portion A 101a: Outer surface of portion A 102: Portion B 102a: Outer surface of portion B  11: Air exhaust passage 111: Air outlet 112: Air inlet  12: Liquid guide passage 121: Liquid inlet 122: Liquid outlet  13: Outer surface of lower part of liquid collector  14: First annular protrusion 15: First annular recess  16: Partition part 17: Shielding body 171: Window 172: Shielding side wall 173: Protection side wall  18: Handle  2: Tube plug 201: Lowest point of lower part of tube plug 202: Lowest point of lower part of tube plug  21: First passage 211: Wall of first passage  22: Second annular recess  23: Second annular protrusion 241: Annular protrusion 242: Annular protrusion  25: Barrier 251: Upper face 252: Fixed part 253: Movable part 254: Lateral side face  26: Bottom face of tube plug  3: Test tube  31: Tube cavity  32: Opening end  33: Annular groove  4: Test tube assembly  5: Liquid level D1: Height of test tube D2: Height of tube cavity of test tube D3: Height of shielding body D4: Distance from liquid level to lowest point of lower part of tube plug

DETAILED DESCRIPTION OF THE EMBODIMENT

[0094] The present application will be further illustrated below in conjunction with the drawings. The described embodiments below are merely illustrative preferable embodiments without limiting the scope of the present application. In contrary, it is intended to encompass various modifications and equivalents thereof in the scope of the present application.

First Embodiment

[0095] The present application will be further described below in combination with FIGS. 1, 2, 3, 10 and 13.

[0096] A combined structure of a liquid collector with a test tube assembly includes a liquid collector 1 and a test tube assembly 4, where the test tube assembly 4 includes a tube plug 2 and a test tube 3.

[0097] The test tube 3 includes a tube cavity 31 and an opening end 32. The tube cavity has a height D2 of 103 mm, and the opening end of the test tube 3 has a diameter of 14 mm.

[0098] The upper part of the tube plug 2 is provided with a first axial passage 21, the wall 211 of which is provided with a second annular protrusion 23. The lower part of the tube plug 2 is provided with four barriers 25 of a sheet shape. Each of the barriers 25 includes a fixed part 252 and a movable part 253 extending from the fixed part 252 toward the inside of the test tube. The movable part 253 is deflectable relative to the fixed part 252, and may be formed integrally with the fixed part 252. The barriers 25 are integral parts of the tube plug 2.

[0099] When the lower part 10 of the liquid collector is not inserted in the tube plug 2, lateral side faces 254 of the four sheet-shaped barriers 25 abut one another.

[0100] Annular side wall of the liquid collector 1 surrounds an axial passage, in which a partition part 16 is arranged to separate the axial passage into a liquid guide passage 12 and an air exhaust passage 11 insulated from the liquid guide passage 12. The liquid guide passage 12 includes a liquid inlet 121 and a liquid outlet 122 which is a lower opening of the liquid guide passage 12. The air exhaust passage 11 includes an air outlet 111 and an air inlet 112 which is a lower opening of the air exhaust passage 11. The bottom end of the partition part 16 is lower than the liquid outlet 122 and the air inlet 112.

[0101] The lower part 10 of the liquid collector includes a portion A 101 and a portion B 102. The bottom of the portion A 101 shrinks and is connected to the portion B 102. A first annular recess 15 is arranged on the outer surface 101a of the portion A.

[0102] A shielding body 17 is arranged around the lower opening (including the liquid outlet 122 and the air inlet 112) of the axial passage of the liquid collector 1. In an implementation, the shielding body 17, which may be formed integrally with the liquid collector 1, may surround the test tube 3 at an angle of 360°, and have a height D3 of 99 mm.

[0103] The tube plug 2 is placed at the opening end 32 of the test tube 3, and the barriers 25 are positioned within the tube cavity of the test tube 3.

[0104] The lower part 10 of the liquid collector is connected to the test tube assembly 4 in a manner of inserting as follows.

[0105] The lower part 10 of the liquid collector is inserted in the first passage 21 of the tube plug 2, where the outer surface 101a of the portion A abuts on the wall 211 of the first passage 21. Particularly, the first annular recess 15 on the outer surface 101a of the portion A cooperates with the second annular protrusion 23 on the wall 211 of the first passage 21, and the portion B of the lower part 10 of the liquid collector pushes the four barriers 25 downwards and outwards, so that the outer surface 102a of the portion B abuts on the upper faces 251 of the four barriers 25. Here, the lower part 10 of the liquid collector axially passes through the tube plug 2.

[0106] The liquid outlet 122 and the air inlet 112 of the liquid collector 1 are positioned in the tube cavity 31 of the test tube 3, are distanced from the opening of the test tube by 26 mm, and are lower than the lowest point 201 of the lower part of the tube plug by 8 mm. The outer diameter of the portion B has an outer diameter of 8 mm at the point abutting on the upper faces 251 of the barriers 25.

[0107] Upon completion of liquid collecting, the residual liquid in the liquid collector 1 may be poured out and the liquid collector 1 is separated from the test tube assembly 4, in this case, the liquid level 5 in the test tube 3 is distanced from the lowest point 202 of the lower part of the tube plug by a distance D4 of 4 mm.

Second Embodiment

[0108] The present application will be further described below in combination with FIGS. 1, 4, 9, 11 and 14.

[0109] A combined structure of a liquid collector with a test tube assembly includes a liquid collector 1, a tube plug 2 and a test tube 3.

[0110] The test tube 3 includes a tube cavity 31 and an opening end 32. The tube cavity has a height D2 of 110 mm, and the opening end of the test tube 3 has a diameter of 13.5 mm.

[0111] The upper part of the tube plug 2 is provided with a first axial passage 21, the wall 211 of which is provided with a second annular protrusion 23. The lower part of the tube plug 2 is provided with four barriers 25 of a sheet shape. Each of the barriers 25 includes a fixed part 252 and a movable part 253 extending from the fixed part 252 toward the inside of the test tube. The movable part 253 is deflectable relative to the fixed part 252, and may be formed integrally with the fixed part 252. The barriers 25 are integral parts of the tube plug 2.

[0112] The barriers 25 are below the second annular protrusion 23. When the lower part 10 of the liquid collector is not inserted in the tube plug 2, lateral side faces 254 of the four sheet-shaped barriers 25 abut one another.

[0113] Annular side wall of the liquid collector 1 surrounds an axial passage, in which a partition part 16 is arranged to separate the axial passage into a liquid guide passage 12 and an air exhaust passage 11 insulated from the liquid guide passage 12. The liquid guide passage 12 includes a liquid inlet 121 and a liquid outlet 122 which is a lower opening of the liquid guide passage 12. The air exhaust passage 11 includes an air outlet 111 and an air inlet 112 which is a lower opening of the air exhaust passage 11.

[0114] The lower part 10 of the liquid collector includes a portion A 101 and a portion B 102. The bottom of the portion A 101 shrinks and is connected to the portion B 102. A first annular recess 15 is arranged on the outer surface 101a of the portion A.

[0115] A shielding body 17 is arranged around the lower opening (including the liquid outlet 122 and the air inlet 112) of the axial passage of the liquid collector 1. In an implementation, the shielding body 17, which may be formed integrally with the liquid collector 1, surrounds the test tube 3 at an angle of 360°, and has a height D3 of 110 mm.

[0116] The tube plug 2 is placed at the opening end 32 of the test tube 3, and the barriers 25 are positioned within the tube cavity of the test tube 3.

[0117] The lower part 10 of the liquid collector is connected to the test tube assembly in a manner of inserting as follows.

[0118] The lower part 10 of the liquid collector is inserted in the first passage 21 of the tube plug 2, where the outer surface 101a of the portion A abuts on both the wall 211 of the first passage 21 and the second annular protrusion 23 arranged on the wall 211 of the first passage 21. Particularly, the portion B 102 of the lower part 10 of the liquid collector pushes the four barriers 25 downwards and outwards (lateral), so that the outer surface 102a of the portion B abuts on the upper faces 251 of the four barriers 25. Here, the lower part 10 of the liquid collector axially passes through the tube plug 2.

[0119] The liquid outlet 122 and the air inlet 112 of the liquid collector 1 are positioned in the tube cavity 31 of the test tube 3, are distanced from the opening of the test tube by 23 mm, and are lower than the lowest point 201 of the lower part of the tube plug by 5 mm. The outer diameter of the portion B has an outer diameter of 9 mm at the point abutting on the upper faces 251 of the barriers 25.

[0120] Upon completion of liquid collecting, the residual liquid in the liquid collector 1 may be poured out and the liquid collector 1 is separated from the test tube assembly 4, in this case, the liquid level 5 in the test tube 3 is distanced from the lowest point 202 of the lower part of the tube plug by a distance D4 of 4.5 mm.

Third Embodiment

[0121] The present application will be further described below in combination with FIGS. 1, 5, 6, 12 and 15.

[0122] A combined structure of a liquid collector with a test tube assembly includes a liquid collector 1, a tube plug 2 and a test tube 3.

[0123] The test tube 3 includes a tube cavity 31 and an opening end 32. The tube cavity has a height D2 of 101 mm, and the opening end of the test tube 3 has a diameter of 14.5 mm.

[0124] The upper part of the tube plug 2 is provided with a first axial passage 21, the wall 211 of which is provided with a second annular recess 22. The lower part of the tube plug 2 is provided with four barriers 25 of a sheet shape. Each of the barriers 25 includes a fixed part 252 and a movable part 253 extending from the fixed part 252 toward the inside of the test tube. The movable part 253 is deflectable relative to the fixed part 252, and may be formed integrally with the fixed part 252. The barriers 25 are integral parts of the tube plug 2.

[0125] When the lower part 10 of the liquid collector is not inserted in the tube plug 2, lateral side faces 254 of the four sheet-shaped barriers 25 abut one another.

[0126] Annular side wall of the liquid collector 1 surrounds an axial passage, in which a partition part 16 is arranged to separate the axial passage into a liquid guide passage 12 and an air exhaust passage 11 insulated from the liquid guide passage 12. The liquid guide passage 12 includes a liquid inlet 121 and a liquid outlet 122 which is a lower opening of the liquid guide passage 12. The air exhaust passage 11 includes an air outlet 111 and an air inlet 112 which is a lower opening of the air exhaust passage 11.

[0127] The lower part 10 of the liquid collector includes a portion A 101 and a portion B 102. The bottom of the portion A 101 shrinks and is connected to the portion B 102. A first annular protrusion 14 is arranged on the outer surface 101a of the portion A.

[0128] A shielding body 17 is arranged around the lower opening (including the liquid outlet 122 and the air inlet 112) of the axial passage of the liquid collector 1. The shielding body 17 includes a window 171 for scanning and inspecting. In an implementation, the shielding body 17, which may be formed integrally with the liquid collector 1, surrounds the test tube 3 at an angle of 360°, and has a height D3 of 100 mm.

[0129] The tube plug 2 is placed at the opening end 32 of the test tube 3, and the barriers 25 are positioned within the tube cavity of the test tube 3.

[0130] The lower part 10 of the liquid collector is connected to the test tube assembly in a manner of inserting as follows.

[0131] The lower part 10 of the liquid collector is inserted in the first passage 21 of the tube plug 2, where the outer surface 101a of the portion A abuts on the wall 211 of the first passage 21. Also, the first annular protrusion 14 on the outer surface 101a of the portion A matches with the second annular recess 22 arranged on the wall 211 of the first passage 21. Particularly, the portion B 102 of the lower part 10 of the liquid collector pushes the four barriers 25 downwards and outwards (lateral), so that the outer surface 102a of the portion B abuts on the upper faces 251 of the four barriers 25. Here, the lower part 10 of the liquid collector axially passes through the tube plug 2.

[0132] The liquid outlet 122 and the air inlet 112 of the liquid collector 1 are positioned in the tube cavity 31 of the test tube 3, are distanced from the opening of the test tube by 15 mm, and are lower than the lowest point 201 of the lower part of the tube plug by 5 mm. The outer diameter of the portion B 102 has an outer diameter of 8.5 mm at the point abutting on the upper faces 251 of the barriers 25.

[0133] Upon completion of liquid collecting, the residual liquid in the liquid collector 1 may be poured out and the liquid collector 1 is separated from the test tube assembly 4, in this case, the liquid level 5 in the test tube 3 is distanced from the lowest point 202 of the lower part of the tube plug by a distance D4 of 5 mm.

Fourth Embodiment

[0134] The present application will be further described below in combination with FIGS. 1, 7, 8, 10 and 13.

[0135] A combined structure of a liquid collector with a test tube assembly includes a liquid collector 1, a tube plug 2 and a test tube 3.

[0136] The test tube 3 includes a tube cavity 31 and an opening end 32. The tube cavity has a height of 102 mm, and the opening end of the test tube 3 has a diameter of 14.5 mm.

[0137] The upper part of the tube plug 2 is provided with a first axial passage 21, the wall 211 of which is provided with a second annular protrusion 23. The lower part of the tube plug 2 is provided with four barriers 25 of a sheet shape. Each of the barriers 25 includes a fixed part 252 and a movable part 253 extending from the fixed part 252 toward the inside of the test tube. The movable part 253 is deflectable relative to the fixed part 252, and may be formed integrally with the fixed part 252. The barriers 25 are integral parts of the tube plug 2.

[0138] When the lower part 10 of the liquid collector is not inserted in the tube plug 2, lateral side faces 254 of the four sheet-shaped barriers 25 abut one another.

[0139] Annular side wall of the liquid collector 1 surrounds an axial passage, in which a partition part 16 is arranged to separate the axial passage into a liquid guide passage 12 and an air exhaust passage 11 insulated from the liquid guide passage 12. The liquid guide passage 12 includes a liquid inlet 121 and a liquid outlet 122 which is a lower opening of the liquid guide passage 12. The air exhaust passage 11 includes an air outlet 111 and an air inlet 112 which is a lower opening of the air exhaust passage 11.

[0140] The lower part 10 of the liquid collector includes a portion A 101 and a portion B 102. The bottom of the portion A 101 shrinks and is connected to the portion B 102.

[0141] A shielding body 17 is arranged around the lower opening (including the liquid outlet 122 and the air inlet 112) of the axial passage of the liquid collector 1. The shielding body 17 includes a window 171 for scanning and inspecting. In an implementation, the shielding body 17, which may be formed integrally with the liquid collector 1, surrounds the test tube 3 at an angle of 360°, and has a height D3 of 100 mm.

[0142] The tube plug 2 is placed at the opening end 32 of the test tube 3, and the barriers 25 are positioned within the tube cavity of the test tube 3.

[0143] The lower part 10 of the liquid collector is connected to the test tube assembly in a manner of inserting as follows.

[0144] The lower part 10 of the liquid collector is inserted in the first passage 21 of the tube plug 2, and the outer surface 101a of the portion A abuts on the second annular protrusion 23 arranged on the wall 211 of the first passage 21. Particularly, the portion B 102 of the lower part 10 of the liquid collector pushes the four barriers 25 downwards and outwards (lateral), so that the outer surface 102a of the portion B abuts on the upper faces 251 of the four barriers 25.

[0145] The liquid outlet 122 and the air inlet 112 of the liquid collector 1 are positioned in the tube cavity 31 of the test tube 3, are distanced from the opening of the test tube by 15 mm, and are lower than the lowest point 201 of the lower part of the tube plug by 5 mm. The outer diameter of the portion B 102 has an outer diameter of 9.5 mm at the point abutting on the upper faces 251 of the barriers 25.

[0146] Upon completion of liquid collecting, the residual liquid in the liquid collector 1 may be poured out and the liquid collector 1 is separated from the test tube assembly 4, in this case, the liquid level 5 in the test tube 3 is distanced from the lowest point 202 of the lower part of the tube plug by a distance D4 of 6 mm.

Fifth Embodiment

[0147] The present application will be further described below in combination with FIGS. 16, 17, 18, 19 and 20.

[0148] A combined structure of a liquid collector with a test tube assembly includes a liquid collector 1 and a test tube assembly 4, which includes a tube plug 2 and a test tube 3.

[0149] The test tube 3 includes a tube cavity 31 and an opening end 32. An annular groove 33 is arranged on the inner wall of the test tube 3. The tube cavity has a height D2 of 103 mm, and the opening end of the test tube 3 has a diameter of 14 mm.

[0150] The upper part of the tube plug 2 is provided with a first axial passage 21, the wall 211 of which is provided with a second annular protrusion 23. The lower part of the tube plug 2 is provided with four barriers 25 of a sheet shape. Each of the barriers 25 includes a fixed part 252 and a movable part 253 extending from the fixed part 252 toward the inside of the test tube. The movable part 253 is deflectable relative to the fixed part 252, and may be formed integrally with the fixed part 252. The barriers 25 are integral parts of the tube plug 2. An annular protrusion 241 and an annular protrusion 242 are arranged on the outer wall of the body of the tube plug 2.

[0151] In the case of the test tube assembly 4, the tube plug 2 is placed at the opening end 32 of the test tube 3, where the outer wall of the body of the tube plug 2 abuts against the wall of the tube cavity of the test tube 3, the annular protrusion 241 on the outer wall of the body of the tube plug 2 cooperates with the annular groove 33 on the cavity wall of the test tube 3, and the annular protrusion 242 cooperates with the top end face of the test tube 3. The barriers 25 are positioned within the tube cavity of the test tube 3.

[0152] When the lower part 10 of the liquid collector is not inserted in the tube plug 2, lateral side faces 254 of the four sheet-shaped barriers 25 abut one another.

[0153] Annular side wall of the liquid collector 1 surrounds an axial passage, in which a partition part 16 is arranged to separate the axial passage into a liquid guide passage 12 and an air exhaust passage 11 insulated from the liquid guide passage 12. The liquid guide passage 12 includes a liquid inlet 121 and a liquid outlet 122 which is a lower opening of the liquid guide passage 12. The air exhaust passage 11 includes an air outlet 111 and an air inlet 112 which is a lower opening of the air exhaust passage 11. The bottom end of the partition part 16 is lower than the liquid outlet 122 and the air inlet 112.

[0154] The lower part 10 of the liquid collector includes a portion A 101 and a portion B 102. The bottom of the portion A 101 shrinks and is connected to the portion B 102. A first annular recess 15 is arranged on the outer surface 101a of the portion A.

[0155] A shielding body 17 is arranged around the lower opening (including the liquid outlet 122 and the air inlet 112) of the axial passage of the liquid collector 1. The shielding body 17, which may be formed integrally with the liquid collector 1, surrounds the test tube 3 at an angle of 360°, and has a height D3 of 99 mm. The liquid collector 1 includes a handle 18, which is provided with a protection side wall 173 configured for preventing liquid from sputtering on the handle 18.

[0156] The lower part 10 of the liquid collector is connected to the test tube assembly 4 in a manner of inserting as follows.

[0157] The lower part 10 of the liquid collector is inserted in the first passage 21 of the tube plug 2, and the outer surface 101a of the portion A abuts on the wall 211 of the first passage 21. Here, the first annular recess 15 on the outer surface 101a of the portion A of the liquid collector cooperates with the second annular protrusion 23 arranged on the wall 211 of the first passage 21. Particularly, the portion B 102 of the lower part 10 of the liquid collector pushes the four barriers 25 downwards and outwards (lateral), so that the outer surface 102a of the portion B abuts on the upper faces 251 of the four barriers 25. Here, the lower part 10 of the liquid collector axially passes through the tube plug 2.

[0158] The liquid outlet 122 and the air inlet 112 of the liquid collector 1 are positioned in the tube cavity 31 of the test tube 3, are distanced from the opening of the test tube by 26 mm, and are lower than the lowest point 201 of the lower part of the tube plug by 8 mm. The outer diameter of the portion B 102 has an outer diameter of 8 mm at the point abutting on the upper faces 251 of the barriers 25.

[0159] Upon completion of liquid collecting, the residual liquid in the liquid collector 1 may be poured out and the liquid collector 1 is separated from the test tube assembly 4, in this case, the liquid level 5 in the test tube 3 is distanced from the lowest point 202 of the lower part of the tube plug by a distance D4 of 5 mm.