CN213129593U - Sampling pipe cap and sampling pipe - Google Patents

Abstract

The utility model discloses a sampling tube cap and a corresponding sampling tube, wherein the sampling tube cap comprises a plugging body and an annular cladding body connected with the plugging body, an annular sealing groove is arranged in the annular cladding body, the annular sealing groove is provided with a first side wall and a second side wall which are opposite, a raised sealing ring is arranged on the first side wall, and a guiding closing-up structure comprising an inclined part and a containing part is arranged on the second side wall; the starting point of the guiding closing-in structure is positioned as follows: the second side wall corresponds to the area between the bottom wall of the groove and the sealing ring, and the terminal point of the guiding closing-in structure is arranged on the bottom wall of the groove; along the direction of starting point to terminal point, slope and holding portion set gradually, and the slope of second lateral wall is close to first lateral wall gradually and extends, and the holding portion of second lateral wall encloses with first lateral wall and becomes the passageway that is used for the sampling pipe body that cooperatees and uses to stretch into. This sampling pipe tube cap can realize outstanding leakproofness with between the body of looks adaptation.

Description

Sampling pipe cap and sampling pipe

Technical Field

The utility model belongs to the technical field of the sampling instrument technique and specifically relates to a sampling pipe tube cap and sampling pipe are related to.

Background

Many samples are often collected, examined, and often stored for extended periods of time during modern scientific research. How to achieve more convenient, lower cost and longer storage of collected samples is a subject that needs to be continuously explored.

For example, for sampling of viruses, it is common to extract saliva, dip the subject's saliva with a swab and place it into a sampling tube containing a holding fluid, and wait for testing. The testing process may also require centrifugation or the like. In the operation process with large movement amplitude, if the sealing performance of the sampling tube is not good, the phenomenon of liquid leakage can occur. The bad sealing performance of the sampling pipe can also accelerate the deterioration of the sample, and the effective storage time of the sample is reduced.

In a traditional sampling tube, a sealing ring or a sealing ring is added at the sealing position of a tube opening and a tube body to improve the sealing performance of the sampling tube. However, the sealing effect of the sampling tube is still difficult to meet the use requirement, and particularly, after the sampling tube is placed for a period of time, the sealing ring or the sealing ring deforms, and the sealing effect is further deteriorated.

SUMMERY OF THE UTILITY MODEL

Based on this, one of the objects of the utility model is to provide a can effectively improve the sampling pipe tube cap of the sealed effect of sampling pipe and long-time sealing reliability, further aim at provides a sampling pipe including this sampling pipe tube cap.

According to an embodiment of the utility model, a sampling tube cap comprises a blocking body and an annular cladding body connected with the blocking body, wherein an annular sealing groove is arranged in the annular cladding body, the annular sealing groove is provided with a first side wall and a second side wall which are opposite, a raised sealing ring is arranged on the first side wall, and a guiding closing-up structure comprising an inclined part and a containing part is arranged on the second side wall;

the starting point of the guiding closing-in structure is positioned as follows: the second side wall corresponds to the area between the bottom wall of the groove and the sealing ring, and the terminal point of the guiding closing-in structure is arranged on the bottom wall of the groove; the edge the starting point extremely the direction of terminal point, the rake with the holding portion sets gradually, the rake of second lateral wall is close to gradually first lateral wall extends, the holding portion of second lateral wall with first lateral wall encloses into the passageway that is used for supplying the sampling pipe body that cooperatees to use to stretch into.

In one embodiment, the sealing ring is provided in plurality, and the starting point of the guiding closing-in structure is located at: the second side wall corresponds to a region between the groove bottom wall and the seal ring furthest from the groove bottom wall.

In one embodiment, the second side wall of the inclined portion is smoothly inclined.

In one embodiment, the accommodating part is a straight surface, and the included angle between the inclined part and the accommodating part is more than or equal to 135 degrees.

In one embodiment, a horn-shaped opening and a groove for fixing a swab are arranged on one surface in the blocking body for blocking the opening of the tube body of the sampling tube, and one narrow end of the horn-shaped opening is communicated with the groove.

In one embodiment, the second side wall located outside the guiding and closing-in structure is further provided with threads.

In one embodiment, the width of the groove bottom wall is 1 mm-10 mm.

Further, a sampling pipe, it includes sampling pipe body and according to above-mentioned arbitrary embodiment sampling pipe tube cap, the pipe wall that sampling pipe body is close to the tube socket department with annular seal groove on the sampling pipe tube cap looks adaptation.

In one embodiment, the tube body of the sampling tube body is in smooth transition with the tube bottom.

In one embodiment, a limiting body is arranged on the outer peripheral wall of the sampling tube body, a blocking part is arranged on the first side wall of the sampling tube cap, and the limiting body and the blocking part are matched and abutted for use.

The traditional sampling tube body peripheral wall only adopts the mode of adding a sealing ring or a sealing ring at the sealing position of the tube opening and the tube body to improve the sealing performance of the sampling tube. However, the sealing effect of such a sampling tube is still poor, and the main reasons are: although the sealing ring can fill the gap between the pipe cover and the pipe body, so that the pipe cover and the pipe body are tightly attached, the pipe body is also subjected to continuous stress action, and the pipe orifice can be spread, so that the sealing effect is poor. The inventor has discovered this problem and has purposefully provided the sampling tube cap of the present invention.

Specifically, the sampling tube cap provides a guided constriction on the second sidewall of the annular seal groove therein, which includes an inclined portion and a parallel portion extending from the start to the bottom wall of the groove. In the in-service use process, the body of sampling pipe stretches into gradually in the sampling pipe tube cap that has this structure, can take place towards the slight slope of second lateral wall because of the effect of sealing ring after the mouth of pipe passes the sealing ring on the first lateral wall. When the mouth of pipe butt of slight slope connects to the rake, can receive the direction of rake to stretch into the parallel portion gradually to the mouth of pipe that originally takes place the slope can be absorbed into the parallel portion by the office on, realizes orificial binding off. With this sampling tube cap cooperation use sampling tube body not only with between the tube cap realize the one-level sealed through interference fit's mode, still close up through direction binding off structure, restricted the deformation direction of sampling tube body, realize that the second grade is sealed. The sampling tube has extremely high sealing performance and is very suitable for actual sampling and storing scenes.

This sampling pipe tube cap and sampling pipe body of looks adaptation all can adopt macromolecular material shaping preparation in the mould to this sampling pipe tube cap is not high to the plane requirement on the mouth of pipe of the sampling pipe body rather than the cooperation use, only need the pipe wall of sampling pipe body level and smooth and clean can, consequently need not higher preparation precision, can reduce the manufacturing cost of mould, simplify actual manufacturing process, improve the yield in the actual manufacturing process, be favorable to batch production preparation.

Drawings

FIG. 1 is a schematic view of an embodiment of a sampling tube 10;

FIG. 2 is a cross-sectional view of sampling tube 10;

FIG. 3 is an enlarged view of a portion of area A of FIG. 2;

FIG. 4 is a cross-sectional view of the body 200 of sampling tube 10;

FIG. 5 is a perspective view of a tube body 200 of the sampling tube 10.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the following embodiments and effect drawings. The preferred embodiments of the present invention have been described. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In addition, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or may be connected through two or more elements. It should be understood that it is a matter of course that those skilled in the art can correspondingly understand the specific meanings of the above terms according to specific situations without causing ambiguity.

Unless otherwise defined, in the description of the present invention, terms indicating orientation or positional relationship such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings of the present invention, which are only for convenience and simplicity in describing the contents of the present invention, and help the reader understand the drawings, not for defining or implying a specific orientation that the referred device or element must have, and thus should not be interpreted as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. "multi" herein includes a combination of two or more items.

To facilitate the description of the functions of the tube cap of the sampling tube of the present invention, the following embodiments will first be described with reference to the structure of an integral sampling tube. The advantages of the present invention will be more readily understood and appreciated by those skilled in the art from the following description of the sampling tube.

Referring to fig. 1, a sampling tube 10 includes a sampling tube cap 100 and a sampling tube body 200, wherein the sampling tube cap 100 and the sampling tube body 200 can be used in a sealing manner, and fig. 1 shows a state of the sampling tube 10 when they are nested and sealed with each other.

More specifically, to understand the internal details of sampling tube 10, please refer to FIG. 2, which shows a cross-sectional view of sampling tube 10. The sampling tube cap 100 comprises a block-out body 110 and an annular cover body 120 connected to the block-out body 110. Wherein, an annular sealing groove 130 is provided in the annular cladding 120. According to the example shown in fig. 2, it can be appreciated that the annular seal groove 130 is used for penetration and sleeving of the sample tube body 200.

Annular seal groove 130 has opposing first and second sidewalls 131, 132. In the orientation shown in fig. 2, during actual use, the second sidewall 132 is disposed in contact with the outer side of the sampling tube body 200, and the first sidewall 131 is disposed in contact with the inner side of the sampling tube body 200. Wherein, the first sidewall 131 and the second sidewall 132 are respectively provided with a structure for enhancing the sealing capability, which is located in a region a in fig. 2. Please refer to fig. 3 for an enlarged view of the region a.

As shown in fig. 3, the first sidewall 131 is provided with a raised sealing ring 1311 for interference fit. The interference fit is characterized in that the hole is expanded and deformed by the elasticity of the material to be sleeved on the shaft, and the hole generates a clamping force to the shaft when being restored, so that the two parts are connected. For example, in fig. 3, the sampling tube body 200 and the sampling tube cap 100 are mutually squeezed at the sealing ring 1311, so as to be tightly attached to each other, thereby achieving a sealing effect, which is marked as one-stage sealing in the present invention.

In one particular example, the sampling tube cap 100 is a plastic tube cap. Plastics have relatively excellent mechanical properties, such as high strength and high toughness, and are easy to be stressed to locally deform so as to keep the integral structure unchanged. In addition, the plastic pipe cover can be prepared in one step by injection molding in a mold, so that the preparation cost is effectively reduced, and the yield is increased.

In one specific example, the sealing ring 1311 is a plastic sealing ring or a rubber sealing ring. The rubber sealing ring has more excellent elasticity and sealing performance, but cannot be directly formed on the surface of the plastic pipe cover in the injection molding process, and needs to be further assembled at the later stage; and when the rubber sealing ring is sleeved, a limiting groove is often required to be formed on the surface of the side wall of the plastic pipe cover in advance, so that the process is more complicated and the cost is higher. The plastic sealing ring can be directly integrated with the pipe cover, so that the process is simpler and the cost is lower relatively.

In one specific example, the sealing ring 1311 is provided in plurality, and the plurality of sealing rings 1311 are arranged in this order. The plurality of sealing rings 1311 can further enhance the sealing of the sampling tube 10. In this embodiment, shown in FIG. 3, there are two sealing rings in the sampling tube cap 100.

However, the sealing effect is still poor only by the sealing ring 1311. The main reasons are as follows: although the sealing ring can fill the gap between the sampling tube cap 100 and the sampling tube body 200, so that the cap and the tube body are tightly attached to each other, the sampling tube body 200 can be subjected to continuous stress action, and the tube opening can be opened due to the stress action, so that the sealing effect is poor. Based on this problem, the utility model discloses a direction binding off structure has further been set up on second lateral wall 132.

Referring to fig. 3, the guiding and closing structure includes an inclined portion 1321 and an accommodating portion 1322 sequentially arranged from a starting point to an ending point. The starting point of which is located on the second sidewall 132 corresponding to the region between the groove bottom wall 133 and the seal ring 1311. When there are a plurality of seal rings, the starting point should be a region of the second side wall 132 corresponding to between the groove bottom wall 133 and the seal ring farthest from the groove bottom wall 133. For example, in the orientation shown in fig. 3, the groove bottom wall 133 is located at the uppermost portion of the annular sealing groove 130, and the starting point of the guiding bead structure is located on the second sidewall 132, specifically, in the region between the sealing rings 1311 below and below the groove bottom wall 133, i.e., the region of the second sidewall 132 corresponding to the region between the groove bottom wall 133 and the sealing rings 1311. The termination point of the leading crimping structure is disposed on the channel bottom wall 133. In the inclined portion 1321, the second side wall 132 gradually extends closer to the first side wall 131; in receptacle 1322, second side wall 132 and first side wall 131 enclose a passage into which sampling tube body 200 protrudes for mating use.

In the orientation shown in fig. 3, when actually used, the sampling tube body 200 gradually extends into the annular sealing groove 130 from bottom to top, and since the starting point of the guiding closing-in structure in the second sidewall 132 is located above the sealing ring 1311, the sampling tube body 200 will first contact the sealing ring 1311 and be propped open, and the nozzle slightly inclines to the right. The slightly angled nozzle then abuts the face of angled portion 1321 of sampling tube body 200. Angled portion 1321 changes the direction of movement of sampling tube body 200 such that sampling tube body 200 continues to move upward and gradually contracts as the angle of angled portion 1321 increases. The process is directed to closing in. In the sampling tube cap 100 with the sealing ring 1311 and the guiding and closing structure, the sampling tube body 200 is slightly deformed outwards and inwards in sequence, corresponding to the primary sealing and the secondary sealing. The simultaneous presence of two seals with different deformation directions provides a greater seal for the sampling tube 10. The sampling tube 10 effectively avoids the disadvantage of irreversible deformation caused by long-term inclination of the tube body of the traditional sampling tube only with one-stage sealing.

In one specific example, the second sidewall 132 of the inclined portion 1321 is smoothly inclined for the convenience of the actual manufacturing process and the smoothness of the sampling tube body 200 when sliding in contact with the inclined portion 1321. The smooth slope is a straight slope in cross section, which means that the distance between the second sidewall 132 and the first sidewall 131 varies linearly from the beginning to the end of the leading cuff structure. In other specific examples, the inclined portion 1321 may be a smoothly-transitioned curved surface, such as a circular arc surface, a parabolic surface, or the like.

In a specific example, the second sidewall 132 of the receptacle 1322 is a straight surface, the included angle between the second sidewall 132 of the inclined portion 1321 and the second sidewall 132 of the receptacle 1322 is greater than or equal to 135 °, and the included angle is a minor angle rather than a major angle between two planes. Referring to fig. 3, the second sidewall of the receptacle 1322 is a vertical surface, the inclined portion 1321 is an inclined surface, and an included angle between the inclined surface and the vertical surface is a minor angle of the shadow portion, and the included angle is less than or equal to 180 ° rather than a major angle of the blank area. It is understood that if it is understood herein as a reflex angle, it contradicts the characteristics of the inclined portion 1321 itself.

In a specific example, the second sidewall 132 of the receiving portion 1322 extends in parallel with respect to the correspondingly positioned first sidewall 131. The "relative position" here refers to the portion of the first sidewall 131 that cooperates with the second sidewall 132 to define the channel. Based on the actual manufacturing process, the wall of the sampling tube body 100 is generally a uniform wall, and correspondingly, the two sidewalls extend in parallel to form the accommodating portion 132 for accommodating the sampling tube body 100.

In one particular example, the width of the slot bottom wall 133 is 1mm to 10mm, such as 1mm, 3mm, 5mm, 7mm, 9mm, 10mm or a range therebetween. It will be appreciated that the width of the groove bottom wall 133 is adapted to the wall thickness of the sampling tube body 200 with which the sampling tube cap 100 is used. Generally, a sampling tube of larger dimensions will also require a thicker tube wall, but generally, the sampling tube wall should not be too thick or too thin. When the pipe wall is too thin, the sampling pipe is too fragile, the integral strength is low, the original shape is difficult to effectively keep, and the sampling pipe is easy to damage. Too thick a wall may result in high stiffness and difficulty in deforming, and thus difficult to deform while passing the sealing ring 1311 and/or difficult to contract in time at the leading setback, resulting in difficulty in fitting.

It is understood that the guiding and closing structure of the present embodiment may only include the inclined portion 1321 and the accommodating portion 1322, but this does not mean that the guiding and closing structure in other embodiments may not include other structures, such as additional widening of the distance between the first sidewall 131 and the second sidewall 132 when approaching the bottom of the slot, as long as it has the structural or functional features of the two portions to achieve the effect. Also, in the position shown in FIG. 3, the first sidewall 131 and the structure thereon are disposed adjacent to the inner wall of the sampling tube body 200, and the second sidewall 132 and the structure thereon are disposed adjacent to the outer wall of the sampling tube body 200. However, in other embodiments, the first sidewall 131 and the structure thereon can be disposed adjacent to the outer wall of the sampling tube body 200, and the second sidewall 132 and the structure thereon can be disposed adjacent to the inner wall of the sampling tube body 200, so long as the two-stage sealing function described herein can be achieved.

In other embodiments, a sealing ring may be disposed on the bottom wall 133. On one hand, the sealing ring can be used as a butting component when the sampling tube body 200 extends; on the other hand, the sealing washer can also take place the deformation of certain degree, reserves certain tolerance for the sampling pipe body 200 stretches into the degree of depth.

The sampling tube 10 has a variety of applications, such as storage for reagent samples, containment centrifugation for reagent samples, or collection of viral samples. It is understood that the blocking body 110 can be a flat surface for merely inserting into the sampling tube body 200 to block the nozzle of the sampling tube body 200, provided that it is used only for storing a reagent sample or for containing a reagent sample for centrifugation. When used for collection of a virus sample, a structure for placing a swab may also be provided in the occlusion body 110.

For sampling viruses, it is common to extract saliva by dipping a subject's body fluid (e.g., saliva, digestive tract fluid, etc.) with a swab and placing the swab in a sampling tube containing a preservative fluid. Swab is a device in which a small mass of absorbent material, such as cotton, rayon, etc., is wrapped around one end of a shaft. After the swab is dipped into the body fluid of the subject, the shaft may be secured within the occluding body 110 so that the absorbent material thereon is immersed in the preserving fluid.

Thus, referring to fig. 2, in a specific example, corresponding to a usage scenario of virus sampling, a flared opening 111 and a recess 112 for fixing a swab are provided on one side of the blocking body 110 for blocking the opening of the tube body 200 of the sampling tube. One end of the narrow mouth of the trumpet-shaped opening 111 communicates with the groove 112. In the orientation shown in fig. 2, the flared opening 111 is inverted, and the wide mouth of the flared opening 111 faces the sampling tube body 200. The recess 112 is a cylindrical recess, and the swab shaft can be inserted into the recess 112 for fixation.

In one specific example, the sampling tube cap 100 and the sampling tube body 200 are mated and threaded to achieve a nested fit with one another. For example, as shown in FIG. 4, sampling tube body 200 has a nozzle 210, and threads 211 are provided on the outside of nozzle 210. The shape of the thread 211 may be a two-way guide track thread; more specifically, the threads 211 may be single or multiple start threads. Therein, the multiple-start thread may more particularly be a double-start thread. In this embodiment, threads 211 on the outside of nozzle 210 are external national standard L-shaped two-way rail nozzle threads that facilitate sealing and balanced locking, which further enhances the sealing ability of sampling tube 10.

Correspondingly, the second sidewall 132 of the sampling tube cap 100 is also provided with a cap internal thread corresponding to the above-mentioned nozzle external thread. When sampling pipe tube cap 100 and sampling pipe body 200 cooperation were used, operating personnel only need with sampling pipe body 200 screw in sampling pipe tube cap 100 in, can accomplish sealedly.

In one specific example, in order to facilitate screwing the sampling tube cap 100, a circle of lines for increasing friction force may be further provided on the outer circumferential wall of the annular coating body 120 of the sampling tube cap 100, so as to facilitate screwing by an operator in an actual operation process.

Of course, in other embodiments, the sampling tube cap 100 and the sampling tube body 200 may be sleeved by a snap-fit structure, that is, the sampling tube body 200 is directly inserted into the annular sealing groove 130 of the sampling tube cap 100 and is abutted to a predetermined position.

In one embodiment, sampling tube body 200 further comprises a neck 220 for spacing nozzle 210 from tube body 230. The neck 220 is a limiting body disposed on the outer peripheral wall of the sampling tube body 200. Optionally, the spacing body is a ring of annular spacing bodies. Correspondingly, the second sidewall 132 of the sampling tube cap 100 is also provided with a blocking portion, and the limiting body can be used in cooperation with the blocking portion to limit the depth of the sampling tube body 200 extending into the sampling tube cap.

The sampling tube body 230 is used to load reagents and may be of various shapes, such as cylindrical, regular polygonal cylindrical, and elliptical. In this embodiment, sampling tube shaft 230 is cylindrical. The sampling tube bottom 240 may be a planar bottom, and the sampling tube body 230 is smoothly shrunk and transited to the planar sampling tube bottom 240. This planar sampling tube socle can effectively reduce the residue of reagent at the in-service use in-process, fully improves the utilization ratio of reagent.

In one particular example, sampling tube shaft 230 has a support 231 with an end flush with tube bottom 240 or protruding above tube bottom 240. When the sampling tube body 230 is connected to the tube bottom 240 in a transition manner, the sampling tube body further continues to extend downwards, so as to form a circle of supporting parts 231 protruding from the tube bottom 240. The bottom area of the planar tube bottom 240 is small, which may cause the sampling tube body 230 not to be placed on the table top, so that a supporting portion 231 is additionally designed to facilitate the placement of the sampling tube body 230. Also, the presence of the support 231 also prevents the tube bottom 240 from directly contacting the bottom platform.

In one particular example, the sampling tube shaft 230 is made of a light-transmissive polymeric material, such as plastic. The plastic has better strength and toughness and good plasticity, is easy to directly form by adopting a mould and is convenient for daily transportation and holding. Meanwhile, the plastic has good chemical solvent resistance, acid and alkali resistance, and can avoid the problem of liquid leakage caused by corrosion of reagents in the plastic.

This sampling pipe tube cap and sampling pipe body of looks adaptation all can adopt macromolecular material shaping preparation in the mould to this sampling pipe tube cap is not high to the plane requirement on the mouth of pipe of the sampling pipe body rather than the cooperation use, only need the pipe wall of sampling pipe body level and smooth and clean can, consequently need not higher preparation precision, can reduce the manufacturing cost of mould, simplify actual manufacturing process, improve the yield in the actual manufacturing process, be favorable to batch production preparation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A sampling tube cap is characterized by comprising a blocking body and an annular cladding body connected with the blocking body, wherein an annular sealing groove is formed in the annular cladding body, the annular sealing groove is provided with a first side wall and a second side wall which are opposite, a raised sealing ring is arranged on the first side wall, and a guide closing-up structure comprising an inclined part and an accommodating part is arranged on the second side wall;

the starting point of the guiding closing-in structure is positioned as follows: the second side wall corresponds to the area between the bottom wall of the groove and the sealing ring, and the terminal point of the guiding closing-in structure is arranged on the bottom wall of the groove; the edge the starting point extremely the direction of terminal point, the rake with the holding portion sets gradually, the rake of second lateral wall is close to gradually first lateral wall extends, the holding portion of second lateral wall with first lateral wall encloses into the passageway that is used for supplying the sampling pipe body that cooperatees to use to stretch into.

2. The sampling tube cap of claim 1, wherein the sealing ring is provided in plurality, and the starting point of the guiding and necking structure is located at: the second side wall corresponds to a region between the groove bottom wall and the seal ring furthest from the groove bottom wall.

3. The sampling tube cap of claim 1, wherein the second sidewall of the angled portion is smoothly sloped.

4. The sampling tube cap of claim 3, wherein the accommodating portion is a straight surface, and the included angle between the inclined portion and the accommodating portion is greater than or equal to 135 °.

5. The sampling tube cap according to any one of claims 1 to 3, wherein a flared opening and a groove for fixing a swab are provided on one surface of the blocking body for blocking the opening of the tube body of the sampling tube, and one end of the narrow opening of the flared opening is communicated with the groove.

6. The sampling tube cap according to any one of claims 1 to 3, wherein the second sidewall outside the guiding and necking structure is further provided with a thread.

7. The sampling tube cap according to any of claims 1 to 3, wherein the width of the bottom wall of the groove is 1mm to 10 mm.

8. A sampling tube is characterized by comprising a sampling tube body and a sampling tube cap according to any one of claims 1-7, wherein the wall of the sampling tube body close to a tube opening is matched with an annular sealing groove on the sampling tube cap.

9. The sampling tube of claim 8, wherein the body of the sampling tube body is smoothly transitioned with the bottom of the tube.

10. The sampling tube of claim 8, wherein a stopper is disposed on the outer peripheral wall of the tube body of the sampling tube, and a stopper is disposed on the second sidewall of the tube cap of the sampling tube, and the stopper can be abutted together.

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