CN209878597U - Detection test tube - Google Patents

Abstract

The utility model provides a detection test tube, which comprises a tube body, a liquid-holding cavity is arranged in the tube body, and one end of the tube body is provided with an opening; the suspension assembly comprises a fixing piece and a movable rod, wherein the fixing piece is provided with an opening, the movable rod is arranged on the fixing piece in a sliding mode, one end of the movable rod is located in the containing cavity, and the movable rod moves axially along the pipe body. The utility model provides a test tube has realized the function at the position of test tube external control test paper in the body through setting up mobilizable subassembly that hangs, has improved the accuracy of testing result.

Description

Detection test tube

Technical Field

The utility model relates to a pregnant equipment technical field that examines especially relates to a detect test tube.

Background

Progesterone is mainly used for understanding the function of corpus luteum, whether ovary has ovulation, whether it is pregnant, whether embryo is healthy, etc. Clinically, it is often used for the reactive diagnosis of amenorrhea such as threatened abortion and habitual abortion, or the cause of amenorrhea. Recent studies found that PDG (pregnanediol 3-glucuronide), a metabolite of progesterone in urine, which can be used to monitor reproductive status and help distinguish between fertile and infertile periods, positively correlated with progesterone levels in the blood. At present, blood is mainly used as a detection sample in detection products for progesterone at home and abroad, and the method comprises that enzyme-linked immunoassay products (radioimmunoassay and enzyme-linked immunoassay) need to separate labeled antigen or antibody (probe) and free antigen or antibody (probe) so as to read results through expensive instruments and equipment, and professional operation is needed, so that the time is long, the operation steps are multiple, and the system error is large. For women who need to be pregnant and need in vitro fertilized to be pregnant, the progesterone level is generally required to be checked every day in the ovulation period, regular blood sampling brings certain pain and insecurity, and urine test sampling is relatively convenient, simple and noninvasive.

The existing urine pregnancy test adopts a test strip to detect, a collected urine sample is placed in a test tube, the water absorption end of the test strip is inserted into urine, and after the urine sample is soaked for a period of time, the urine sample is taken out and placed on a platform to observe a result. However, in the actual operation process, the test strip has no fixed position after being placed in the test tube, so that the end part of the test strip directly sinks to the bottom of the test tube. When the liquid level of the urine sample is higher, the result display area on the test paper can also be immersed in the urine sample, so that the result display fails. Simultaneously, when the degree of depth of test tube was darker, the test paper strip fell into the test tube completely, and inside can contacting the test tube when operating personnel took out, can cause the violation of rules and regulations.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect of the test paper high uncontrollable among the prior art in the test tube to a test tube convenient to control test paper position is provided.

In order to solve the technical problem, the utility model provides a following technical scheme: a test tube comprises

A tube body, which is internally provided with an accommodating cavity capable of accommodating liquid and one end of which is provided with an opening;

the suspension assembly comprises a fixing piece and a movable rod, wherein the fixing piece is provided with an opening, the movable rod is arranged on the fixing piece in a sliding mode, one end of the movable rod is located in the containing cavity, and the movable rod moves axially along the pipe body.

As an optimal solution of the test tube of the present invention, wherein: the movable rod comprises a movable rod and a movable rod,

the operating end is positioned outside the accommodating cavity and drives the movable rod to move along the axial direction of the pipe body;

the placing end is positioned in the containing cavity, moves along with the operating end in the containing cavity, and is provided with a placing structure suitable for placing the test paper.

As an optimal solution of the test tube of the present invention, wherein: the placing structure comprises a placing structure and a placing structure,

the retaining block is fixedly arranged at the end part of the placing end of the movable rod;

the placing groove is formed on the retaining block, and the end part of the test paper is inserted into the placing groove;

and the water permeable hole is formed on the side wall of the retention block and penetrates through the placement groove and the accommodating cavity.

As an optimal solution of the test tube of the present invention, wherein: the movable rod further comprises a locking structure which comprises a locking hole fixedly arranged on the side wall of the movable rod, and the end part of the test paper penetrates through the locking hole and is inserted into the placing structure.

As an optimal solution of the test tube of the present invention, wherein: the fixing piece is detachably connected to the cover body at the opening, a through hole penetrating through the fixing piece is formed in the cover body, and the movable rod penetrates through the through hole and is arranged on the cover body.

As an optimal solution of the test tube of the present invention, wherein: the side wall of the movable rod is provided with a plurality of anti-skidding rings in a protruding mode, and the anti-skidding rings are in contact with the inner wall of the through hole.

As an optimal solution of the test tube of the present invention, wherein: the cover body is also provided with a limit structure which comprises,

the limiting plate is formed on the outer wall of the movable rod in a protruding mode along the radial direction of the movable rod and is positioned outside the containing cavity;

the limiting block is arranged on the cover body, and a limiting space is reserved between the limiting block and the cover body;

when the movable rod reaches the preset position, the limiting plate enters the limiting space.

As an optimal solution of the test tube of the present invention, wherein: the limit structure also comprises a linkage piece which comprises,

the driving rod is movably arranged on the cover body through a mounting frame;

the steering shaft is arranged between the limiting block and the driving rod and arranged on the mounting frame;

the driving rod drives the steering shaft to rotate to drive the limiting block to move.

As an optimal solution of the test tube of the present invention, wherein: the cover body is further provided with a resetting piece, and two ends of the resetting piece are respectively abutted to the limiting plate and the cover body and apply force to the movable rod to move in the direction far away from the pipe body.

As an optimal solution of the test tube of the present invention, wherein: the tube body is also provided with a timer.

The utility model has the advantages that:

1. the utility model provides a test tube has realized the function at the position of test tube external control test paper in the body through setting up mobilizable subassembly that hangs, has improved the accuracy of testing result.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

FIG. 1 is a schematic view showing the structure of a test tube in example 1;

FIG. 2 is a schematic view showing the structure of a test tube in example 2;

FIG. 3 is a schematic view of a placement structure in embodiment 2;

FIG. 4 is a schematic view of a lock structure in embodiment 2;

FIG. 5 is a schematic view of a lock structure in embodiment 3;

FIG. 6 is a schematic structural view of a cover in embodiment 4;

FIG. 7 is a schematic view of a stopper structure according to embodiment 4;

FIG. 8 is a schematic view of a linkage structure according to embodiment 4;

description of the reference numerals

100. A pipe body; 200. a suspension assembly; 300. a timer;

110. an accommodating cavity; 120. an opening; 210. a fixing member; 220. a movable rod;

211. a cover body; 212. a limiting structure; 221. an operation end; 222. an input end is arranged; 223. a placement structure; 224. a locking structure; 225. an anti-slip ring; 226. a spring;

211a, a through hole; 212a, a limiting plate; 212b, a limiting block; 212c, a mounting rack; 212d, a drive rod; 212e, a steered shaft; 212f, guide rails; 223a, a retention block; 223b, placing grooves; 223c, water permeable holes; 224a, locking holes; 224b, a locking ring; 224c, a push rod; 224d, guide block.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

The present embodiment provides a test tube, which has a structure as shown in fig. 1, and includes a tube body 100 and a suspension assembly 200, wherein the tube body 100 has a containing cavity 110 for containing liquid therein, and an opening 120 at one end thereof. The suspension assembly 200 includes a fixed member 210 disposed at the opening 120, and a movable rod 220 slidably disposed on the fixed member 210, wherein one end of the movable rod 220 is located in the receiving cavity 110 and moves along the axial direction of the tube 100. When the test paper is placed on the movable rod 220, the position of the test paper in the receiving cavity 110 is adjusted by operating the moving distance of the movable rod 220 relative to the fixed member 210, so that the test paper is kept at the optimal position to absorb the liquid in the tube 100.

Taking an HCG urine detection operation as an example, the test paper is fixed on the movable rod 220, the movable rod 220 is mounted on the fixed member 210 to adjust the position of the test paper in the tube 100, so that the water absorption area of the test paper is just located in the urine sample for absorption, and then the tube 100 together with the suspension assembly 200 is placed on the test tube rack to keep the vertical direction. In the process of absorption, an operator is not required to keep the state of clamping the test paper all the time, and the workload of the operator is reduced. After absorption is completed for a period of time, the operator directly moves the movable rod 220 upward to move the test strip out of the urine sample, and waits for the result to appear. When the test strip is placed into the tube body 100, the test strip can not be directly contacted with the test strip and the urine sample, so that the influence of human factors on the result is reduced, the operation steps are simplified, and the phenomena that the test strip is excessively immersed into the urine sample and is inconvenient to take out are avoided.

Example 2

The present embodiment provides a test tube, as shown in fig. 2, comprising a tube body 100 and a suspension assembly 200, wherein the tube body 100 has a containing cavity 110 for containing liquid therein and an opening 120 at one end thereof. The suspension assembly 200 includes a fixed member 210 disposed at the opening 120, and a movable rod 220 slidably disposed on the fixed member 210, wherein one end of the movable rod 220 is located in the receiving cavity 110 and moves along the axial direction of the tube 100. When the test paper is placed on the movable rod 220, the position of the test paper in the receiving cavity 110 is adjusted by operating the moving distance of the movable rod 220 relative to the fixed member 210, so that the test paper is kept at the optimal position to absorb the liquid in the tube 100.

As shown in fig. 2, the movable rod 220 in this embodiment is an elongated round rod, and includes an operating end 221 and an inserting end 222, where the operating end 221 is located outside the accommodating cavity 110 to drive the movable rod 220 to move along the axial direction of the tube 100, so as to facilitate adjustment by an operator. The placing end 222 is located in the accommodating cavity 110, moves with the operating end 221 in the accommodating cavity 110, and has a placing structure 223 suitable for placing the test paper. Since the input end 222 and the operation end 221 are located on the same rod, controlling the operation end 221 can control the position of the input end 222. The test paper is placed on the placing end 222 through the placing structure 223, so that the position of the test paper is adjusted.

As shown in fig. 3, the placing structure 223 in this embodiment includes a placing block 223a and a placing groove 223b, the placing block 223a is fixedly connected to an end portion of the movable rod 220 on a side where the placing end 222 is located, one side of the placing block 223a protrudes out of the movable rod 220, and has a top surface perpendicular to the axial direction of the pipe body 100, and the placing groove 223b is formed in the top surface. The end of the test paper is inserted into the placement groove 223b so that the test paper moves together with the resting block 223a and the movable lever 220. Meanwhile, in order not to affect the water absorption effect of the test paper water absorption area, a plurality of water permeable holes 223c are formed in the upper side wall of the retention block 223a, and the water permeable holes 223c penetrate through the placement groove 223b and the accommodation cavity 110, so that urine samples in the accommodation cavity 110 can enter the placement groove 223b and be absorbed by the test paper.

In order to fix the test paper better, the movable rod 220 in this embodiment is further provided with a locking structure 224, which tightly attaches the test paper to the movable sidewall and keeps the direction of the test paper the same as that of the movable rod 220. Specifically, as shown in fig. 4, the locking structure 224 in this embodiment is a locking hole 224a provided on the sidewall of the movable rod 220, the locking hole 224a is formed by a locking ring 224b fixedly provided on the sidewall of the movable rod 220, and two locking rings 224b in this embodiment are provided along the length direction of the movable rod 220. The end part of the test paper where the water absorption area is located passes through the two locking holes once and enters the placing groove 223b, and the test paper is fixed. The two locking holes can prevent the test paper from moving relative to the movable rod 220 after being installed on the movable rod 220, so that the controllability of the position of the test paper is maintained when the movable rod 220 is operated.

Example 3

The present embodiment provides a test tube, which is different from the test tube of embodiment 2 in that the movable rod 220 in the present embodiment has a hollow inner cavity, and a test paper is placed in the inner cavity of the movable rod 220. The operating end 221 of the movable rod 220 has an inlet into which test paper can be inserted. The insertion end 222 is blocked by the retention block 223a, so as to prevent the test paper from sliding off the inner cavity of the movable rod 220. In order to ensure that the test paper can absorb the sample liquid, the retention block 223a is also provided with a water permeable hole 223c so that the inner cavity of the movable rod 220 is communicated with the accommodating cavity 110.

In order to prevent the test paper from moving relative to the movable rod 220 after being placed in the movable rod 220, and thus the test paper is not accurately positioned, in this embodiment, a locking structure 224 is also provided on the movable rod 220. As shown in fig. 5, the locking structure 224 in this embodiment is disposed inside the movable rod 220, and includes a locking ring 224b movably disposed in the inner cavity of the movable rod 220, and a locking hole 224a is left in the middle of the locking ring 224b, and the direction of the locking hole 224a is the same as the axial direction of the movable rod 220. The locking ring 224b has a push rod 224c protruding from the outer side wall thereof, and the end of the push rod 224c protrudes out of the outer wall of the movable rod 220 through a mounting hole in the side wall of the movable rod 220. And the push rod 224c is located on both symmetrical sidewalls of the locking ring 224b so that the locking ring 224b can move in the radial direction of the movable ring. At the upper port position of the locking ring 224b, a pair of guide blocks 224d are fixedly arranged on the inner wall of the movable rod 220, and a gap left between the guide blocks 224d is opposite to the locking hole 224a of the locking ring 224 b. The top surface of the guide block 224d is a slope, and the slope is a slope that rises from a side near the locking hole 224a toward the inner wall of the movable lever 220, so that the end of the test paper falls into the locking hole 224a under the guidance of the slope when contacting the guide block 224 d. After the test paper passes through the locking hole 224a, the push rod 224c on the outer side is pushed, so that the aperture of the channel between the locking pocket and the guide block 224d is changed to clamp the test paper, thereby locking the test paper. After the position of the locking ring 224b is changed, the shearing force applied to the test strip by the locking ring and the guide block 224d slightly deforms the test strip, thereby preventing the test strip from moving. Of course, in order to prevent the test paper from being excessively deformed or even interrupted, a stopper is provided on the inner wall of the movable lever 220 or the bottom of the guide block 224d to limit the maximum moving distance of the locking ring.

Example 4

This embodiment provides a test tube, which has substantially the same structure as the test tube in embodiment 2, except that the fixing member 210 in this embodiment is a cover 211 disposed at the position of the opening 120 of the tube body 100, and the two are connected by a screw thread. As shown in fig. 6, a through hole 211a is formed in the middle of the cover 211, and the axial direction of the through hole 211a is the same as the axial direction of the pipe body 100. The movable rod 220 is disposed on the cover 211 through the through hole 211a, and the movable rod 220 is movable along the cover 211.

As shown in fig. 6, the side wall of the movable rod 220 in this embodiment is further provided with an anti-slip ring 225 for increasing the friction force between the movable rod 220 and the cover 211, so that the movable rod 220 can stay at a certain position under the action of gravity only. The anti-slip ring 225 is formed on the outer wall of the movable rod 220, and a plurality of anti-slip rings are provided along the length direction of the movable rod 220. The anti-slip ring 225 is made of an elastic material, such as silicone plastic, so that the movable rod 220 can contact with the inner wall of the through hole 211 a.

As shown in fig. 6 and 7, the cover 211 in this embodiment is further provided with a limiting structure 212, which is used to limit the movement of the movable rod 220, so that the movable rod 220 and the test paper stay at a preset position, and includes a limiting plate 212a and a limiting block 212 b. The limit plate 212a protrudes on the outer wall of the movable rod 220 in the radial direction of the movable rod 220, and a portion of the limit plate 212a located outside the accommodating chamber 110 of the movable rod 220. The limiting block 212b is movably disposed on the cover 211 and has a limiting surface for limiting the movement of the limiting block 212 a. When the limiting plate 212a abuts against the top surface of the cover 211, the limiting block 212b moves to above the limiting plate 212a and abuts against the other surface of the limiting plate 212a, so that the limiting plate 212a is clamped between the cover 211 and the limiting block 212b, and the movement of the movable rod 220 is limited. When the stopper 212b is removed again, the stopper plate 212a is released and the movable lever 220 continues to move.

The preset position in this embodiment is the optimal position for the water absorption area of the test paper to enter the sample liquid, and the movement of the movable rod 220 is limited by the limiting structure 212, so that the test paper can be prevented from being placed too deeply or too shallowly, and the absorption effect is affected. Meanwhile, the position can be conveniently confirmed by operators, and the operation efficiency is improved.

As shown in fig. 7 and 8, the limiting structure 212 of the present embodiment further includes a linkage member for controlling the moving position of the limiting block 212 b. It includes a mounting bracket 212c fixedly disposed on the cover 211, and a driving rod 212d movably disposed on the mounting bracket 212 c. The stopper 212b is movably disposed on the mounting bracket 212c by a guide rail 212f so as to be capable of reciprocating between positions where it abuts against the stopper plate 212a or where it releases the stopper plate 212 a. A steering shaft 212e is arranged between the driving rod 212d and the limiting block 212b, a gear is arranged on the steering shaft 212e, and linear racks are arranged on the driving rod 212d and one side, close to the limiting block 212b and the steering shaft 212e, of the driving rod 212d and engaged with the racks on the steering shaft 212 e. When the driving rod 212d is moved, the steering shaft 212e is rotated to drive the limiting block 212b to move, so that the limiting block 212b is controlled. Preferably, the steered shaft 212e is rotatably connected to the mounting bracket 212c, and a torsion spring is sleeved on the steered shaft 212e, and the torsion spring applies a torsion force to the steered shaft 212e to drive the steered shaft 212e to move the limit block 212b to the state of abutting against the limit plate 212 a. When the driving rod 212d is pressed, the direction-changing shaft 212e is driven to rotate, so that the torsion spring is twisted to generate elastic force, and the limit block 212b is retracted. After the driving rod 212d is released, the torsion spring drives the steering shaft 212e to rotate to move the limiting block 212b out, so that the limiting plate 212a is locked.

In order to facilitate the lifting operation of the movable rod 220, a restoring member is further disposed between the movable rod 220 and the cover 211 in this embodiment, and applies a force to the movable rod 220 to move in a direction away from the tubular body 100. Specifically, as shown in fig. 6, the restoring member is a spring 226 disposed between the stopper plate 212a and the cover 211, and after the movable lever 220 is fixed in position by the stopper structure 212, the spring 226 is compressed to apply an elastic force to the stopper plate 212 a. After the limiting structure 212 releases the limitation on the movable rod 220, the spring 226 pushes the limiting plate 212a, so that the movable rod 220 moves in the direction away from the tube 100, the test paper is moved out of the sample liquid, and the operation of pulling out the movable rod 220 by an operator is omitted. In order to avoid the spring 226 obstructing the contact between the limiting plate 212a and the cover 211, the cover 211 in this embodiment is provided with a groove for accommodating the compressed spring 226.

The tube 100 in this embodiment is made of transparent material such as plastic and glass, which facilitates the observation of the inside from the outside.

In order to observe the absorption time, the tube 100 of this embodiment is further provided with a timer 300 (not shown) for counting down the immersion time of the test paper.

As an alternative embodiment, the limiting block 212b in this embodiment may also be provided with a limiting groove for accommodating the limiting plate 212 a.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (10)

1. A test tube, comprising: comprises that

A tube body (100) having a receiving chamber (110) for receiving a liquid therein and an opening (120) at one end thereof;

the suspension assembly (200) comprises a fixing piece (210) arranged on the opening (120) and a movable rod (220) arranged on the fixing piece (210) in a sliding mode, wherein one end of the movable rod (220) is located in the accommodating cavity (110) and moves along the axial direction of the pipe body (100).

2. The test tube of claim 1, wherein: the movable rod (220) comprises a movable rod,

the operating end (221) is positioned outside the accommodating cavity (110) and drives the movable rod (220) to axially move along the pipe body (100);

the placing end (222) is positioned in the containing cavity (110), moves along with the operating end (221) in the containing cavity (110), and is provided with a placing structure (223) suitable for placing test paper.

3. The test tube of claim 2, wherein: the placement structure (223) comprises,

a retention block (223a) fixedly arranged at the end part of the insertion end (222) of the movable rod (220);

a placement groove (223b) formed on the placement block (223a), the end portion of the test strip being inserted into the placement groove (223 b);

and a water permeable hole (223c) formed on the side wall of the retention block (223a) and penetrating through the placement groove (223b) and the accommodation cavity (110).

4. A test tube according to claim 2 or 3, wherein: the movable rod (220) further comprises a locking structure (224) which comprises a locking hole (224a) fixedly arranged on the side wall of the movable rod (220), and the end of the test paper is inserted into the placing structure (223) through the locking hole (224 a).

5. The test tube of claim 1, wherein: the fixing piece (210) is detachably connected to the cover body (211) at the opening (120), a through hole (211a) penetrating through the cover body (211) is formed in the cover body (211), and the movable rod (220) penetrates through the through hole (211a) and is arranged on the cover body (211).

6. The test tube of claim 5, wherein: the side wall of the movable rod (220) is provided with a plurality of anti-skidding rings (225) in a protruding mode, and the anti-skidding rings (225) are in contact with the inner wall of the through hole (211 a).

7. The test tube of claim 6, wherein: the cover body (211) is also provided with a limiting structure (212) which comprises,

the limiting plate (212a) is formed on the outer wall of the movable rod (220) in a protruding mode along the radial direction of the movable rod (220) and is located on the outer side of the accommodating cavity (110);

the limiting block (212b) is arranged on the cover body (211), and a limiting space is reserved between the limiting block and the cover body (211);

when the movable rod (220) reaches a preset position, the limiting plate (212a) enters the limiting space.

8. The test tube of claim 7, wherein: the limit structure (212) further comprises a linkage piece which comprises,

the driving rod (212d) is movably arranged on the cover body (211) through a mounting frame (212 c);

a steered shaft (212e) disposed between the stopper (212b) and the driving lever (212d), and disposed on the mounting bracket (212 c);

the driving rod (212d) drives the steering shaft (212e) to rotate so as to drive the limiting block (212b) to move.

9. The test tube of claim 8, wherein: still be equipped with the piece that resets on lid (211), the both ends of the piece that resets respectively with limiting plate (212a) with lid (211) butt, to movable rod (220) applys to keeping away from the power of body (100) direction motion.

10. The test tube of claim 9, wherein: the tube body (100) is also provided with a timer (300).