sample container

Abstract

The application discloses a sample container which comprises a main body, a middle cover and an upper cover. The main body is provided with a cavity for storing samples and a cavity opening communicating with the cavity. The middle cover is arranged on the main body and partially covers the cavity opening. The middle cover is provided with a sample inlet channel communicating with the cavity and the outside. The outer peripheral wall of the middle cover is provided with a first limiting portion and a first guide portion. The first limiting portion is located between the first guide portion and the communication position of the sample inlet channel and the outside. The side of the first guide portion facing the first limiting portion is formed with a first guide surface. At least part of the surface of the guide surface is provided in a slope or arc shape. The upper cover is detachably arranged on the middle cover and covers the sample inlet channel. The inner peripheral wall of the upper cover is provided with a second limiting portion and a second guide portion. The second limiting portion is connected with the first limiting portion. The second guide portion is in abutting limiting connection with the first guide portion. The sample container provided by the application has higher efficiency in sample adding operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a sample container. Background Technology

[0002] In the sample testing process within a medical laboratory, in order to ensure that sample tubes, reagent bottles, and other sample containers have a sufficient amount of usable sample, it is necessary to add sample into the sample containers. This is the sample addition operation.

[0003] In related technologies, sample containers are sealed with a lid, and the sample container and its lid are connected by threads. When performing the sample addition operation, the lid must first be rotated to open it. During the opening operation, the lid needs to be rotated multiple times to separate from the sample container, resulting in a long sample addition operation and low efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide a sample container that improves the efficiency of sample addition operations.

[0005] To achieve the above objectives, the present invention proposes a sample container, the sample container comprising:

[0006] The main body is provided with a cavity for storing samples and an opening communicating with the cavity;

[0007] A middle cover, disposed on the main body and partially covering the cavity opening; the middle cover has a sample inlet channel communicating with the cavity and the outside; the outer peripheral wall of the middle cover has a first limiting portion and a first guiding portion protruding, the first limiting portion being located between the first guiding portion and the communication point between the sample inlet channel and the outside; the side of the first guiding portion facing the first limiting portion has a first guiding surface, at least a portion of the surface of the guiding surface being inclined or arc-shaped; and

[0008] The upper cover is detachably disposed on the middle cover and covers the sample inlet channel; the inner peripheral wall of the upper cover is provided with a second limiting part and a second guiding part, the second limiting part is engaged with the first limiting part, and the second guiding part abuts against the first guiding part for limiting;

[0009] When the upper cover rotates relative to the middle cover, the second guide portion moves along the guide surface of the first guide portion and causes the first limiting portion to disengage from the second limiting portion.

[0010] In one embodiment of the present invention, the first limiting portion is disposed along the circumferential direction of the outer wall of the middle cover;

[0011] The cross-sectional area of ​​the first limiting portion gradually decreases from the end closest to the first guide portion to the end furthest from the first guide portion;

[0012] When the upper cover is connected to the middle cover, the second limiting part abuts against and limits the side of the first limiting part facing the first guide part.

[0013] In one embodiment of the present invention, the second guide portion is disposed along the circumferential direction of the outer wall of the middle cover;

[0014] The second guide portion has a second guide surface formed on the side facing the first guide portion. The second guide surface is wavy, and the shape of the first guide surface of the first guide portion matches the shape of the second guide surface of the second guide portion.

[0015] In one embodiment of the present invention, the middle cover includes a drainage section and a sealing section connected to each other;

[0016] The drainage section is provided with a drainage channel, and the capping section is provided with a transition channel communicating with the cavity. The transition channel and the drainage channel are connected to form the sample injection channel.

[0017] The capping section is detachably connected to the main body, the drainage section is detachably connected to the upper cover, and the upper cover covers the drainage channel.

[0018] In one embodiment of the present invention, the sample container further includes a sampling component;

[0019] One end of the sampling element passes through the transition channel and is inserted into the drainage channel. A sample passage gap is formed between the end of the sampling element located in the drainage channel and the inner wall of the drainage channel. The sample passage gap is connected to the transition channel.

[0020] In one embodiment of the present invention, the sampling member is provided with a plurality of first ribs and second ribs at one end located in the drainage channel;

[0021] Each of the first ribs is spaced apart along the length of the sampling member, and each of the second ribs connects to two adjacent first ribs and is located between two adjacent first ribs;

[0022] Each of the first ribs abuts against and limits the inner wall of the drainage channel, and each of the second ribs is spaced apart from the inner wall of the drainage channel, forming the sample passage gap between each of the second ribs and the inner wall of the drainage channel.

[0023] In one embodiment of the present invention, each of the second ribs has a groove on the side facing away from the sampling member, and the groove is arranged along the length direction of the sampling member.

[0024] In one embodiment of the present invention, each of the first ribs has an extension protruding from one end of the sampling member away from the transition channel;

[0025] The extensions of each of the first ribs enclose a filtration space that communicates with the sample passage gap.

[0026] In one embodiment of the present invention, the outer wall of each of the extensions is provided with a third guide surface, and the cross-sectional area of ​​the extensions gradually decreases from the end near the sampling member to the end away from the sampling member.

[0027] In one embodiment of the present invention, the cross-sectional area of ​​the sampling member located at one end within the drainage channel gradually decreases from the end closer to the transition channel to the end farther away from the transition channel.

[0028] In one embodiment of the present invention, the end of the sampling member away from the drainage channel extends through the transition channel into the cavity;

[0029] The sampling component has a sampling slot at the end away from the drainage channel.

[0030] In one embodiment of the present invention, a sealing rib is provided around the periphery of the connection between the transition channel and the drainage channel. The sealing rib is located inside the transition channel and forms a sealing groove with the side wall of the transition channel.

[0031] The main body is accommodated and confined within the sealing groove at one end near the top cover.

[0032] In one embodiment of the present invention, the outer wall of the sealing rib is provided with a fourth guide surface, and the cross-sectional area of ​​the end of the sealing rib near the drainage channel is greater than the cross-sectional area of ​​the end of the sealing rib away from the drainage channel.

[0033] In one embodiment of the present invention, the side wall of the sealing groove facing the sealing rib is provided with a clearance surface, and the inner width of the sealing groove at the end near the drainage channel is smaller than the inner width of the sealing groove at the end away from the drainage channel.

[0034] In one embodiment of the present invention, the inner wall of the transition channel is provided with an internal thread, the outer wall of the main body near the upper cover is provided with an external thread, and the middle cover is screwed to the main body through the cooperation of the internal thread and the external thread;

[0035] The inner width of the transition channel gradually increases from the end closest to the drainage channel to the end furthest from the drainage channel.

[0036] In one embodiment of the present invention, the inner wall of the upper cover is provided with a sealing post, which is inserted into the sample inlet channel and seals the sample inlet channel;

[0037] And / or, the outer wall of the upper cover is provided with a glue-breaking groove;

[0038] And / or, the outer wall of the upper cover is provided with a rotation direction mark.

[0039] In one embodiment of the present invention, a limiting protrusion is provided on the outer wall of the main body near the end of the upper cover, and the end of the middle cover abuts against the limiting protrusion for limiting.

[0040] In one embodiment of the present invention, the bottom space of the cavity gradually contracts along the direction from the cavity opening toward the bottom wall of the cavity.

[0041] In one embodiment of the present invention, a support portion is provided at one end of the main body away from the cavity opening;

[0042] The support portion is arranged around the outer periphery of the bottom space of the cavity, and a support plane is formed on the side of the support portion away from the cavity opening.

[0043] The technical solution of this invention involves placing a middle cover on the main body of a sample container, and then placing a top cover on top of the middle cover. The middle cover has a sample inlet channel communicating with the cavity of the main body, while the top cover covers the sample inlet channel of the middle cover. This top cover isolates and protects the sample inlet channel, preventing airborne particles from entering the cavity and contaminating the sample. Simultaneously, a first limiting part and a first guiding part are spaced apart on the outer peripheral wall of the middle cover. The first guiding part has a first guiding surface facing the first limiting part and at least a portion of its surface being inclined or curved. A second limiting part and a second guiding part are provided on the top cover corresponding to the first limiting part and the first guiding part, respectively. When the top cover and the middle cover are assembled, the first limiting part and the second limiting part engage, and the first guiding part and the second guiding part abut and limit each other, thus achieving mutual fixation between the top cover and the middle cover. When adding samples to this sample container, a slight rotation of the top cover moves the second guide surface on the top cover along the first guide surface with its varying heights on the middle cover. This pushes the top cover upwards relative to the middle cover, causing the second limiting part on the top cover to disengage from the first limiting part on the middle cover. The top cover and middle cover then separate, exposing the sample inlet channel on the middle cover. Samples can then be added into the cavity of the main body through this channel. Thus, this sample container can be opened with only a slight twist of the top cover, and after opening, sample addition can be conveniently performed through the sample inlet channel of the middle cover, greatly improving the efficiency of sample addition operations. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the sample container of the present invention;

[0046] Figure 2 for Figure 1 Cross-sectional view of the medium-sized sample container along line A-A';

[0047] Figure 3 for Figure 2 Enlarged structural diagram of section B;

[0048] Figure 4 for Figure 2 Exploded view of the sample container;

[0049] Figure 5 for Figure 1 An exploded view of the sample container from one perspective;

[0050] Figure 6 for Figure 5 Enlarged structural diagram of section C;

[0051] Figure 7 for Figure 1 An exploded view of the sample container from another perspective.

[0052] Explanation of icon numbers:

[0053]

[0054]

[0055] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0057] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Throughout the text, "and / or" and "and / or" have the same meaning, both indicating the inclusion of three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0060] This invention provides a sample container, combined with Figure 1 , Figure 2 , Figure 4 as well as Figure 5As shown, the sample container includes a main body 1, a middle cover 2, and a top cover 3. The main body 1 has a cavity 1a for storing samples and an opening 1a1 communicating with the cavity 1a. The middle cover 2 is located on the main body 1 and partially covers the opening 1a1. The middle cover 2 has a sample inlet channel 2a communicating with the cavity 1a and the outside. The outer peripheral wall of the middle cover 2 has a first limiting part 211 and a first guide part 212 protruding. The first limiting part 211 is located between the first guide part 212 and the connection between the sample inlet channel 2a and the outside. The first guide part 212 faces the first limiting part 211. The upper cover 3 is detachably mounted on the middle cover 2 and covers the sample inlet channel 2a. The inner peripheral wall of the upper cover 3 is provided with a second limiting part 31 and a second guiding part 32. The second limiting part 31 is engaged with the first limiting part 211, and the second guiding part 32 abuts against the first guiding part 212 for limiting. When the upper cover 3 rotates relative to the middle cover 2, the second guiding part 32 moves along the guiding surface of the first guiding part 212 and drives the first limiting part 211 to disengage from the second limiting part 31.

[0061] In this embodiment, the main body 1 can be a tubular or bottle-shaped structure with a cavity 1a capable of storing a sample. It should be noted that the sample here is not limited to the test sample such as human blood or organ tissue fluid, but also includes the test reagents involved in the sample testing process. In addition, the main body 1 can also be used to hold other liquids or solid-liquid mixtures other than the test sample mentioned above. The sample objects that the main body 1 can store are not limited here.

[0062] The middle cover 2 covers the opening 1a1 of the cavity 1a of the main body 1, and can be detachably connected to the main body 1 by means of screws, snaps, or other methods. The middle cover 2 is located between the upper cover 3 and the main body 1. The middle cover 2 has a portion that covers the opening 1a1 of the cavity 1a of the main body 1 and a portion that extends into the inner cavity of the upper cover 3. The middle cover 2 has a sample inlet channel 2a that communicates with the outside and the cavity 1a of the main body 1. The upper cover 3 is placed on the middle cover 2 and covers the upper opening of the sample inlet channel 2a to block the communication between the sample inlet channel 2a and the outside, ensuring the airtightness of the sample inlet channel 2a and the cavity 1a. For example, combined with Figure 1 and Figure 5 As shown, the main body 1 of the sample container is a tubular structure. The longitudinal cross-sectional shape of both the main body 1 and the upper cover 3 is U-shaped. The middle cover 2 has a part that protrudes towards the upper cover 3 and extends into the inner cavity of the upper cover 3, as well as a part that covers the top of the main body 1.

[0063] The outer wall of the middle cover 2 is provided with a first limiting part 211 and a first guide part 212. The first limiting part 211 and the first guide part 212 can be arranged along the circumferential direction of the outer peripheral wall of the middle cover 2. At this time, the first limiting part 211 and the first guide part 212 are both ring-shaped structures. The side wall of the inner cavity of the upper cover 3 is provided with a second limiting part 31 and a second guide part 32. The second guide part 32 can be arranged along the circumferential direction of the inner wall of the upper cover 3. At this time, the second guide part 32 is ring-shaped, and the second limiting part 31 can be a protrusion, block, ring, or other structure. Figure 7 As shown, the second limiting part 31 and the second guide part 32 are spaced apart. The second limiting part 31 can be located on the side of the second guide surface 321 of the second guide part 32 that faces away from the opening of the cover 3. The second guide part 32 can extend from the end of the inner wall of the cover 3 near the opening to the end away from the opening. The second limiting part 31 can also be provided on the second guide part 32 and spaced apart from the second guide surface 321 of the second guide part 32. Figure 5 As shown, the first limiting part 211 and the first guiding part 212 are spaced apart, and a groove is formed between the first limiting part 211 and the first guiding part 212. When the upper cover 3 and the middle cover 2 are assembled, the upper cover 3 is pressed down, and the second limiting part 31 of the upper cover 3 moves downward along the outer wall of the first limiting part 211 of the middle cover 2. The second limiting part 31 of the upper cover 3 is finally engaged in the groove, thereby realizing the connection and fixation between the upper cover 3 and the middle cover 2.

[0064] When the upper cover 3 is connected to the middle cover 2, the second guide portion 32 on the side wall of the inner cavity of the upper cover 3 abuts against and limits the first guide portion 212 on the outer wall of the middle cover 2; specifically, the first guide portion 212 has a first guide surface 2121 facing the first limiting portion 211, and the second guide portion 32 has a second guide surface 321 facing away from the second limiting portion 31. At least a portion of the surface of the first guide surface 2121 is inclined or curved, for example, the first guide surface 2121 is sawtooth-shaped, wavy, etc., and the shape and size of the second guide surface 321 are adapted to the shape and size of the first guide surface 2121. The guide surface 2121 and the second guide surface 321 have continuous and alternating high and low points. Thus, when the upper cover 3 is rotated relative to the lower cover, the contacting first guide surface 2121 and second guide surface 321 move relative to each other. Guided by the inclined or arc-shaped first guide surface 2121 with its high and low points, the second guide surface 321 causes the upper cover 3 to rise relative to the middle cover 2, and the second limiting part 31 to disengage from the aforementioned slot and move upwards along the outer wall of the first limiting part 211 until the first limiting part 211 disengages from the second limiting part 31, at which point the upper cover 3 separates from the middle cover 2. To improve the smoothness of the second limiting part 31 disengaging from the slot when the upper cover 3 rotates, a guide slope or arc surface can be provided on the side wall of the slot facing the first guide surface 2121 to reduce the blocking effect of this side wall on the second limiting part 31.

[0065] In this embodiment, a middle cover 2 is placed on the main body 1 of the sample container, and an upper cover 3 is placed on the middle cover 2. The middle cover 2 has a sample inlet channel 2a that connects to the cavity 1a of the main body 1, and the upper cover 3 covers the sample inlet channel 2a of the middle cover 2. The upper cover 3 isolates and protects the sample inlet channel 2a, preventing suspended matter in the outside air from entering the cavity 1a and contaminating the sample. At the same time, a first limiting part 211 and a first guiding part 212 are provided at intervals on the outer peripheral wall of the middle cover 2. The first guiding part 212 has a first guiding surface 2121 facing the first limiting part 211 and at least part of its surface is a slope or arc surface. A second limiting part 31 is provided on the upper cover 3 corresponding to the first limiting part 211 and a second guiding part 32 corresponding to the first guiding part 212. When the upper cover 3 is assembled with the middle cover 2, the first limiting part 211 and the second limiting part 31 engage, and the first guiding part 212 and the second guiding part 32 abut and limit, thereby fixing the upper cover 3 and the middle cover 2 together. When adding samples to this sample container, a slight rotation of the top cover 3 causes the second guide surface 321 on the top cover 3 to move along the first guide surface 2121 with varying heights on the middle cover 2, simultaneously pushing the top cover 3 upwards relative to the middle cover 2. The second limiting part 31 on the top cover 3 and the first limiting part 211 on the middle cover 2 change from a snap-fit ​​state to a disengaged state, separating the top cover 3 from the middle cover 2. After the top cover 3 is opened, the sample inlet channel 2a on the middle cover 2 is exposed, allowing samples to be added into the cavity 1a of the main body 1 through the sample inlet channel 2a. Thus, this sample container only requires a slight twist of the top cover 3 to open, and after opening, the sample inlet operation can be conveniently performed through the sample inlet channel 2a of the middle cover 2, greatly improving the efficiency of sample addition operations.

[0066] In one embodiment of the present invention, combined with Figure 5 and Figure 7 As shown, the first limiting part 211 is provided along the circumferential direction of the outer wall of the middle cover 2; the cross-sectional area of ​​the first limiting part 211 gradually decreases from the end near the first guide part 212 to the end away from the first guide part 212; when the upper cover 3 is connected to the middle cover 2, the second limiting part 31 abuts against and limits the side of the first limiting part 211 facing the first guide part 212.

[0067] In this embodiment, the first limiting part 211 is a closed ring structure with its ends connected. The first limiting part 211 can adopt an equal width design, so that the width of the first limiting part 211 is equal everywhere along the extension direction of the sample inlet channel 2a. The first limiting part 211 can be integrally formed with the middle cover 2. The ring structure design of the first limiting part 211 allows the second limiting part 31 to engage with the first limiting part 211 when the upper cover 3 is rotated to multiple positions and pressed down at various angles. This achieves multi-angle assembly of the upper cover 3 and the middle cover 2, facilitating the sealing operation of the upper cover 3.

[0068] In this embodiment, the cross-sectional area of ​​the first limiting part 211 is designed to gradually decrease from the end near the first guide part 212 to the end away from the first guide part 212, making the first limiting part 211 as a whole conical shape. This allows the outer peripheral wall of the first limiting part 211 to be set as a conical surface. Thus, when the upper cover 3 is assembled onto the middle cover 2, the second limiting part 31 can move down along the outer wall of the first limiting part 211 and move slightly to the side under the supporting force of the first limiting part 211. The upper cover 3 expands slightly outward and is subjected to gradually increasing downward pressure resistance until the second limiting part 31 is inserted into the groove between the first guide part 212 and the first limiting part 211. At this point, the downward pressure resistance on the upper cover 3 disappears. This not only improves the tightness of the fit between the upper cover 3 and the middle cover 2, but also improves the feel of manual sealing operation.

[0069] Furthermore, during the opening process, rotating the upper cover 3, with the guidance and cooperation of the first guide surface 2121 and the second guide surface 321, the second limiting part 31 will be subjected to a strong squeezing force from the first limiting part 211 the moment it disengages from the aforementioned slot. At this time, the equivalent force exerted by the first limiting part 211 on the upper cover 3 is upward. As the second limiting part 31 moves upward along the outer wall of the first limiting part 211, the force exerted by the first limiting part 211 on the second limiting part 31 gradually weakens until the first limiting part 211 disengages from the second limiting part 31, the force exerted by the first limiting part 211 on the second limiting part 31 disappears, and the force exerted by the middle cover 2 on the upper cover 3 also disappears. During this process, the operator can clearly feel the upper cover 3 being lifted and the lifting force on the upper cover 3 gradually weakening. Therefore, the structural design of the first limiting part 211 in this embodiment can greatly improve the sealing and opening feel of this sample container and improve the user experience.

[0070] In one embodiment of the present invention, combined with Figure 5 and Figure 7 As shown, the second guide portion 32 is arranged along the circumferential direction of the outer wall of the middle cover 2; a second guide surface 321 is formed on the side of the second guide portion 32 facing the first guide portion 212, the second guide surface 321 is arranged in a wave shape, and the shape of the first guide surface 2121 of the first guide portion 212 matches the shape of the second guide surface 321 of the second guide portion 32.

[0071] In this embodiment, the first guide surface 2121 of the first guide portion 212 and the second guide surface 321 of the second guide portion 32 are both arranged in a wave shape. Thus, the first guide surface 2121 and the second guide surface 321 both have high points and low points, similar to the structure of wave crests and troughs. Furthermore, the first guide surface 2121 and the second guide surface 321 can be designed to be more gentle and less likely to form a stop surface, which is beneficial to improving the smoothness of the movement of the second guide surface 321 relative to the first guide surface 2121 and improving the user's opening experience.

[0072] In one embodiment of the present invention, combined with Figure 2 , Figure 4 as well as Figure 5 As shown, the aforementioned middle cover 2 includes a drainage section 21 and a sealing section 22 connected to each other; the drainage section 21 is provided with a drainage channel 21a, and the sealing section 22 is provided with a transition channel 22a communicating with the cavity 1a. The transition channel 22a communicates with the drainage channel 21a to form a sample injection channel 2a; the sealing section 22 is detachably connected to the main body 1, and the drainage section 21 is detachably connected to the upper cover 3. The upper cover 3 covers the drainage channel 21a.

[0073] In this embodiment, the drainage section 21 and the capping section 22 are two connected structures on the upper cover 3. The drainage section 21 and the capping section 22 can be integrally formed. The cross-sectional area of ​​the drainage section 21 is smaller than that of the middle cover 2. The capping section 22 is adapted to the main body 1 and has a wider width relative to the drainage section 21. The drainage section 21 is a contracted section structure on the middle cover 2 relative to the capping section 22, making the middle cover 2 a structure that is narrower at the top and wider at the bottom. In this way, on the one hand, the volume of the middle cover 2 can be reduced, which is beneficial to compressing the overall volume of the sample container; on the other hand, it also makes the drainage channel 21a in the drainage section 21 relatively narrower, reducing the risk of sample leakage from the sample container, and also helps to control the sample flow rate, allowing for more accurate sample addition and dispensing operations through the drainage channel 21a.

[0074] The drainage section 21 extends into the inner cavity of the upper cover 3. The drainage section 21 has a drainage channel 21a extending along its height direction. The outer wall of the drainage section 21 has the aforementioned first limiting part 211 and first guide part 212. The drainage section 21 is detachably connected to the upper cover 3 through the snap-fit ​​engagement of the first limiting part 211 and the second lower limiting part, and the abutment limiting engagement of the first guide surface 2121 and the second guide surface 321. The sealing section 22 has a transition channel 22a communicating with the drainage channel 21a. The transition channel 22a also communicates with the cavity 1a through the cavity opening 1a1 of the cavity 1a. The sealing section 22 is detachably connected to the main body 1 by screwing, snap-fitting, or other methods to improve the efficiency of assembling and disassembling the middle cover 2 and the main body 1, facilitating the sealing and opening operations of this sample container.

[0075] In one embodiment of the present invention, combined with Figures 5 to 7 As shown, the sample container also includes a sampling component 4; one end of the sampling component 4 passes through the transition channel 22a and is inserted into the drainage channel 21a. The end of the sampling component 4 located in the drainage channel 21a forms a sample passage gap with the inner wall of the drainage channel 21a, and the sample passage gap is connected to the transition channel 22a.

[0076] In this embodiment, the sampling component 4 is used for rapid sampling when the middle cover 2 is opened. The sampling component 4 is inserted into the drainage channel 21a and connected to the inner wall of the drainage channel 21a by means of interference fit, snap-fit, etc. When the middle cover 2 is opened, the middle cover 2 and the upper cover 3 as a whole can be used as the operating handle of the sampling component 4 to facilitate manual sampling by the user. The sampling component 4 can be a sampling spoon, sampling tag, etc., and is not limited here.

[0077] The sampling component 4, located at one end within the drainage channel 21a, forms a sample passage gap with the inner wall of the drainage channel 21a, communicating with the transition channel 22a. This allows the top cover 3 to be opened, and the sample to be added through the upper opening of the sample inlet channel 2a. The sample then enters the cavity 1a along the sample inlet channel 2a and the sample passage gap, improving the efficiency of the sample addition operation. Furthermore, by designing and controlling the width of the sample passage gap between the outer wall of the sampling component 4 and the inner wall of the drainage channel 21a, particulate impurities with a diameter larger than the width of the sample passage gap can be prevented from entering the cavity 1a through the gap, achieving the filtration of large particulate impurities. The filtered large particulate impurities can be poured out through the upper opening of the sample inlet channel 2a, improving the purity of the sample stored in the sample container.

[0078] In one embodiment of the present invention, combined with Figure 5 and Figure 6 As shown, the sampling component 4 is provided with a plurality of first ribs 41 and second ribs 42 at one end within the drainage channel 21a; each first rib 41 is spaced apart along the length of the sampling component 4, and each second rib 42 connects to two adjacent first ribs 41 and is located between two adjacent first ribs 41; each first rib 41 abuts against and limits the inner wall of the drainage channel 21a, and each second rib 42 is spaced apart from the inner wall of the drainage channel 21a, forming a sample passage gap between each second rib 42 and the inner wall of the drainage channel 21a.

[0079] In this embodiment, the thickness of the second rib 42 is less than the thickness of the first rib 41, and the distance between the side of the second rib 42 facing away from the sampling member 4 and the inner wall of the drainage channel 21a is less than the distance between the side of the first rib 41 facing away from the sampling member 4 and the inner wall of the drainage channel 21a, so that when the first rib 41 abuts and is limited by the inner wall of the drainage channel 21a, the aforementioned sample passage gap is formed between the second rib 42 and the inner wall of the drainage channel 21a. The second rib 42 can be arranged in a direction perpendicular to the extension direction of the first rib 41, and one or more second ribs 42 can be arranged in parallel between two adjacent first ribs 41. The second rib 42 can serve as a reinforcing structure, with each second rib 42 connecting to and supporting two adjacent first ribs 41 to help improve the structural strength of the first ribs 41 and ensure that the first ribs 41 can maintain a tight limiting fit with the inner wall of the drainage channel 21a, thereby improving the reliability of the connection between the sampling component 4 and the middle cover 2. On the other hand, the second rib 42 can also serve as a filtering structure, which can block large particulate impurities from entering the sample passage gap and the cavity 1a, thereby improving the purity of the sample stored in the sample container.

[0080] In one embodiment of the present invention, combined with Figure 5 and Figure 6 As shown, each of the second ribs 42 is provided with a groove 42a on the side facing away from the sampling member 4, and the groove 42a is provided along the length direction of the sampling member 4.

[0081] In this embodiment, the groove 42a is used for flow guidance, including guiding the liquid components in the liquid sample or solid-liquid mixture sample added to the sample inlet channel 2a. The groove 42a constrains the flow direction of the liquid components in the added sample, so that the liquid components in the added sample can flow into the cavity 1a as much as possible, reducing the amount of liquid components retained in the drainage channel 21a. In addition, two or more second ribs 42 can be provided between any two adjacent first ribs 41. Each second rib 42 has the above-mentioned groove 42a. Each second rib 42 and the groove 42a thereon form a layer of filter structure. The depth of the grooves 42a on each of the upper and lower distributed second ribs 42 can be the same or different, so as to form a multi-layer filter structure composed of two or more second ribs 42 between two adjacent first ribs 41. The space between two adjacent second ribs 42 can be used to accommodate large particulate impurities that have been filtered out. This can further improve the purity of the sample stored in this sample container and retain and store the target liquid components in the added sample.

[0082] In one embodiment of the present invention, combined with Figure 5 and Figure 6As shown, each of the first ribs 41 has an extension 411 protruding from one end of the sampling member 4 away from the transition channel 22a; the extensions 411 of each first rib 41 enclose a filter space 4a that communicates with the sample passage gap.

[0083] In this embodiment, the extensions 411 of each first rib 41 protrude from the top end face of the sampling member 4, forming the aforementioned filtration space 4a between the extensions 411. This filtration space 4a communicates with the sample passage gap and is used for preliminary filtration of the sample added to the sample inlet channel 2a and entering the sample passage gap. The filtered impurity particles accumulate in the filtration space 4a. The filtration space 4a is correspondingly positioned to the upper opening of the sample inlet channel 2a, allowing for easy discharge of impurity particles through the upper opening of the sample inlet channel 2a. The primary filtration structure of the filtration space 4a, combined with the secondary filtration structure composed of the second rib 42 and the groove 42a, enables two-stage filtration of the added sample. This two-stage filtration structure can progressively filter out particulate impurities of different sizes in the added sample, achieving the purpose of purifying the sample in the sample container. The aforementioned two-stage filtration structure in this embodiment is suitable for the filtration of samples containing solid particulate matter, such as fecal samples.

[0084] In one embodiment of the present invention, combined with Figure 5 and Figure 6 As shown, the outer wall of each of the above extensions 411 is provided with a third guide surface 412, and the cross-sectional area of ​​the extension 411 gradually decreases from the end near the sampling member 4 to the end away from the sampling member 4.

[0085] In this embodiment, the third guide surface 412 is an inclined surface or an outwardly convex arc surface. The setting of the third guide surface 412 makes the outer wall of the top end of the extension 411 of the first rib 41 form a chamfer structure. In this way, when the sampling component 4 is assembled into the drainage channel 21a, the avoidance and guiding effect of the third guide surface 412 can reduce the assembly resistance of the sampling component 4, improve the smoothness of the installation of the sampling component 4, and facilitate the removal / installation of the sampling component 4 on the middle cover 2.

[0086] In one embodiment of the present invention, combined with Figure 5 and Figure 6 As shown, the cross-sectional area of ​​the sampling element 4 located at one end in the drainage channel 21a gradually decreases from the end closer to the transition channel 22a to the end farther away from the transition channel 22a.

[0087] In this embodiment, by setting the end of the sampling component 4 located within the drainage channel 21a to be wider at the top and narrower at the bottom, the smoothness of the sampling component 4 during assembly into the drainage channel 21a can be improved. Furthermore, as the top of the sampling component 4 penetrates deeper into the drainage channel 21a, the contact area between the outer wall of the sampling component 4 and the inner wall of the drainage channel 21a increases, and the contact and limiting between the outer wall of the sampling component 4 and the inner wall of the drainage channel 21a becomes increasingly tight. This improves the reliability of the sampling component 4's installation and fixation on the middle cover 2. The wider-at-the-top, narrower-at-the-bottom structure of the end of the sampling component 4 located within the drainage channel 21a can be achieved by setting the first rib 41 to a wedge-shaped structure; this is not limited here.

[0088] In one embodiment of the present invention, combined with Figure 2 , Figure 5 as well as Figure 7 As shown, the end of the sampling component 4 away from the drainage channel 21a extends into the cavity 1a through the transition channel 22a; the end of the sampling component 4 away from the drainage channel 21a is provided with a sampling groove 4b.

[0089] In this embodiment, the end of the sampling member 4 that extends into the cavity 1a is provided with a sampling groove 4b, so that the bottom end of the sampling member 4 can extend into the sample in the bottom space of the cavity 1a, and when the middle cover 2 is opened, it can scoop out a larger amount and larger particles of sample sediment through the sampling groove 4b than through the sampling channel 2a. It can also stir the sample in the cavity 1a through the sampling member 4 to sample more evenly and improve the sampling efficiency.

[0090] In one embodiment of the present invention, combined with Figure 2 , Figure 4 as well as Figure 7 As shown, a sealing rib 221 is provided around the periphery of the connection between the transition channel 22a and the drainage channel 21a. The sealing rib 221 is located inside the transition channel 22a and forms a sealing groove 22b with the side wall of the transition channel 22a. The end of the main body 1 near the upper cover 3 is accommodated and confined within the sealing groove 22b.

[0091] In this embodiment, the sealing rib 221 is arranged around the connection between the drainage channel 21a and the transition channel 22a, and is in a ring shape. The sealing rib 221 is located entirely within the transition channel 22a of the capping section 22, and forms a sealing groove 22b with the inner peripheral wall of the transition channel 22a. When the middle cover 2 is connected to the main body 1, the annular end of the main body 1 with the cavity 1a1 is inserted into the annular sealing groove 22b and seals against the inner wall of the sealing groove 22b. The sealing groove 22b wraps around the annular end of the main body 1 with the cavity 1a1, so that the capping section 22 of the middle cover 2 can tightly cover the periphery of the cavity 1a1 of the main body 1, while the upper cover 3 covers the upper opening of the sample inlet channel 2a. In this way, the middle cover 2 and the upper cover 3 can reliably seal the container, preventing the sample in the cavity 1a from volatilizing and leaking and changing in quality, or preventing external floating objects from entering the cavity 1a and contaminating the sample, thereby improving the reliability of the sample container in storing the sample.

[0092] In one embodiment of the present invention, combined with Figures 2 to 4 As shown, the outer wall of the sealing rib 221 is provided with a fourth guide surface 2211, and the cross-sectional area of ​​the end of the sealing rib 221 near the drainage channel 21a is greater than the cross-sectional area of ​​the end of the sealing rib 221 away from the drainage channel 21a.

[0093] In this embodiment, the fourth guide surface 2211 is formed on the inner peripheral wall of the sealing rib 221 facing the transition channel 22a. The fourth guide surface 2211 is generally arranged in a ring shape and is a bevel or a convex arc surface. The fourth guide surface 2211 can guide the end of the main body 1 with the cavity 1a1 during the assembly of the middle cover 2 and the main body 1, reducing the resistance when the end of the main body 1 moves into the sealing groove 22b, improving the smoothness of the assembly of the middle cover 2 and the main body 1, and facilitating the assembly of the middle cover 2 and the main body 1.

[0094] like Figure 3 As shown, the fourth guide surface 2211 may also include a vertical surface on top and an inclined surface on the bottom. The vertical surface and the inclined surface are connected. When the top of the main body 1 moves along the inclined surface, the top of the main body 1 expands slightly outward until the top of the main body 1 separates from the inclined surface and slides towards the bottom wall of the sealing groove 22b. At this point, the top of the main body 1 tends to contract inward, so that the top of the main body 1 tightens the sealing rib 221 and is engaged in the sealing groove 22b. This can improve the tightness of the contact between the top of the main body 1 and the outer wall of the sealing rib 221, and improve the reliability of the sealing of the cavity 1a by the middle cover 2.

[0095] In one embodiment of the present invention, combined with Figures 2 to 4As shown, the sealing groove 22b has a clearance surface 222 on the side wall facing the sealing rib 221. The inner width of the sealing groove 22b at the end near the drainage channel 21a is smaller than the inner width of the sealing groove 22b at the end away from the drainage channel 21a.

[0096] In this embodiment, the clearance surface 222 is a sloping surface or an outwardly convex arc surface. When the sealing rib 221 is accommodated and confined within the sealing groove 22b, the interference between the top of the main body 1 and the vertical surface of the fourth guide surface 2211 in the previous embodiment is L1, 0.1mm≤L1≤0.3mm, for example, 0.2mm. This interference design is beneficial to improving the tightness of the abutment fit between the sealing rib 221 and the end of the main body 1, and improving the sealing effect of the middle cover 2 on the main body 1. There is a horizontal gap L2 between the sealing rib 221 and the clearance surface 222. This gap is a clearance space. When the top of the main body 1 is inserted into the sealing groove 22b, the top of the main body 1 is pressurized by the sealing rib 221. The top of the main body 1 expands outward and fills the clearance space to form a secondary seal. At this time, the outer wall of the top of the main body 1 abuts against the clearance surface 222, which can further improve the sealing strength of the middle cover 2 on the main body 1. In order to ensure that the clearance surface 222 can fit tightly with the outer wall of the top of the main body 1, 0.1mm≤L2≤0.3mm, for example, 0.2mm.

[0097] In one embodiment of the present invention, combined with Figures 2 to 4 As shown, the inner wall of the transition channel 22a is provided with an internal thread 223, and the outer wall of the main body 1 near the upper cover 3 is provided with an external thread 11. The middle cover 2 is screwed to the main body 1 through the cooperation of the internal thread 223 and the external thread 11. The inner width of the transition channel 22a gradually increases from the end near the drainage channel 21a to the end away from the drainage channel 21a.

[0098] In this embodiment, by setting the sealing section 22 of the middle cover 2 to a structure that is narrow at the top and wide at the bottom, the inner width of the transition channel 22a gradually increases from the end near the drainage channel 21a to the end far from the drainage channel 21a. On the one hand, this facilitates the assembly of the main body 1 and the middle cover 2 by extending the main body 1 into the transition channel 22a through the wide opening at the bottom of the sealing section 22. On the other hand, it allows the distance L3 between the threads of the internal thread 223 on the middle cover 2 and the outer side wall of the main body 1 to be different from the distance L4 between the threads of the external thread 11 on the main body 1 and the inner side wall of the middle cover 2. This avoids the threads on the middle cover 2 contacting the main body 1 and the threads on the main body 1 contacting the middle cover 2 simultaneously, reducing the frictional resistance when the middle cover 2 rotates relative to the main body 1, and improving the smoothness of sealing and opening the middle cover 2. Among them, the values ​​of L3 and L4 are slightly different: 0.3mm≤L3≤0.5mm, for example, 0.4mm; 0.1mm≤L4≤0.3mm, for example, 0.2mm, and 0.1mm≤|L3-L4|≤0.2mm, for example, |L3-L4|=0.1mm.

[0099] In one embodiment of the present invention, combined with Figure 5 and Figure 7 As shown, the inner wall of the upper cover 3 is provided with a sealing post 33, which is inserted into the sample inlet channel 2a and seals the sample inlet channel 2a; and / or, the outer wall of the upper cover 3 is provided with a glue-breaking groove 3a; and / or, the outer wall of the upper cover 3 is provided with a rotation direction mark 34.

[0100] In this embodiment, when the inner wall of the upper cover 3 is provided with a sealing post 33, the sealing post 33 is inserted into the drainage channel 21a of the drainage section 21 of the middle cover 2 to achieve sealing of the drainage channel 21a and the sample injection channel 2a. The sealing post 33 can have a structure that is wider at the top and narrower at the bottom, so that when the sealing post 33 is inserted into the drainage channel 21a, the outer wall of the sealing post 33 can be press-fitted with the inner wall of the drainage channel 21a as the sealing post 33 goes deeper into the drainage channel 21a, thereby improving the tightness of the contact between the outer wall of the sealing post 33 and the inner wall of the drainage channel 21a, and improving the sealing performance of the sealing post 33 for the sample injection channel 2a.

[0101] When the upper cover 3 is provided with a glue-breaking groove 3a, the glue-breaking groove 3a can be a hemispherical groove structure. It serves as the glue injection point during the injection molding of the upper cover 3 and can prevent the gate from breaking during the injection molding of the upper cover 3, which would cause some of the injected glue to protrude from the outer surface of the upper cover 3, thus affecting the appearance of the sample container and the actual feel during use. To ensure the above-mentioned function of the glue-breaking groove 3a, the depth of the glue-breaking groove 3a1b is greater than or equal to 0.10 mm and less than or equal to 0.5 mm, for example, the depth of the glue-breaking groove 3a1b is 0.35 mm.

[0102] When the outer wall of the top cover 3 is provided with a rotation direction mark 34, the rotation direction mark 34 can be a raised arrow or a grooved arrow mark provided on the top surface of the top cover 3. The rotation direction mark 34 is arranged around the outer periphery of the above-mentioned glue break groove 3a and is used to indicate the rotation direction of the top cover 3 opening operation, so as to facilitate the user to open the cover.

[0103] In one embodiment of the present invention, combined with Figure 4 and Figure 5 As shown, the outer wall of the main body 1 near the upper cover 3 is provided with a limiting protrusion 12, and the end of the middle cover 2 abuts against the limiting protrusion 12 for limiting.

[0104] In this embodiment, the limiting platform has a planar surface facing the middle cover 2. When the middle cover 2 is assembled onto the main body 1 through the engagement of the internal thread 223 and the external thread 11, the bottom end of the middle cover 2 approaches and abuts against the limiting boss 12 as the middle cover 2 is rotated. By means of the limiting effect of the planar surface of the limiting boss 12 facing the middle cover 2, the position of the middle cover 2 can be corrected, preventing the middle cover 2 from being misaligned due to the presence of L3 and L4 in the above embodiment and the deformation of the middle cover 2, thus ensuring the reliability of the assembly connection between the middle cover 2 and the main body 1 and the sealing performance of the middle cover 2 to the main body 1.

[0105] In one embodiment of the present invention, combined with Figure 2 and Figure 4 As shown, the bottom space of the cavity 1a gradually contracts along the direction from the cavity opening 1a1 toward the bottom wall of the cavity 1a.

[0106] In this embodiment, by designing the bottom space of the cavity 1a as an inverted conical space structure, the liquid level of the sample in the cavity 1a can be increased when the sample volume in the container cavity is constant. This facilitates sampling and also makes it more effective to dilute the sample. Furthermore, the distance between the outer peripheral wall of the sampling component 4 and the side wall of the bottom space of the cavity 1a is more suitable for the sampling component 4 to stir and mix the sample, which is beneficial to improving the efficiency of sample sampling and mixing.

[0107] In one embodiment of the present invention, combined with Figure 2 , Figure 4 as well as Figure 7 The main body 1 described above is provided with a support part 13 at one end away from the cavity opening 1a1 of the cavity 1a; the support part 13 is arranged around the outer periphery of the bottom space of the cavity 1a, and a support plane is formed on the side of the support part 13 away from the cavity opening 1a1 of the cavity 1a.

[0108] In this embodiment, the support portion 13 is an annular structure surrounding the bottom space of the cavity 1a, which isolates and protects the sample within the bottom space of the cavity 1a. The support portion 13 has a flat support plane, allowing the sample container to stand upright on various carriers such as laboratory tables and supports, thus achieving a vertical design for the sample container. To reduce the volume of the main body 1 and improve the utilization rate of the inner space enclosed by the support portion 13, the shortest distance between the bottom space of the cavity 1a and the support plane is greater than or equal to 1 mm and less than or equal to 5 mm, for example, 2 mm.

[0109] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sample container, characterized by, The sample container comprises: a main body provided with a cavity for storing a sample and a cavity opening in communication with the cavity; a middle cover arranged on the main body and partially covering the cavity opening; the middle cover is provided with a sample inlet channel in communication with the cavity and the outside; a first limiting portion and a first guide portion are arranged on the outer peripheral wall of the middle cover; the first limiting portion is located between the first guide portion and the communication position of the sample inlet channel and the outside; a first guide surface is formed on the side of the first guide portion facing the first limiting portion; at least part of the surface of the guide surface is arranged in a slope or arc shape; and an upper cover detachably arranged on the middle cover and covering the sample inlet channel; the inner peripheral wall of the upper cover is provided with a second limiting portion and a second guide portion; the second limiting portion is connected with the first limiting portion; and the second guide portion is in abutting limiting connection with the first guide portion; when the upper cover rotates relative to the middle cover, the second guide portion moves along the guide surface of the first guide portion and drives the first limiting portion to disengage from the second limiting portion; the middle cover comprises a drainage section and a cover section connected with each other; the drainage section is provided with a drainage channel; the cover section is provided with a transition channel in communication with the cavity; and the transition channel and the drainage channel are in communication to form the sample inlet channel; the cover section is detachably connected with the main body; the drainage section is detachably connected with the upper cover; and the upper cover covers the drainage channel; the sample container further comprises a sampling member; one end of the sampling member penetrates through the transition channel and is inserted into the drainage channel; a sample passing gap is formed between the end of the sampling member located in the drainage channel and the inner wall of the drainage channel; and the sample passing gap is in communication with the transition channel; the end of the sampling member located in the drainage channel is provided with a plurality of first ribs and second ribs; each first rib is arranged in a spaced manner along the length direction of the sampling member; and each second rib connects two adjacent first ribs and is located between the two adjacent first ribs; each first rib is in abutting limiting connection with the inner wall of the drainage channel; each second rib is spaced apart from the inner wall of the drainage channel; and the sample passing gap is formed between each second rib and the inner wall of the drainage channel; a groove is arranged on the side of each second rib facing away from the sampling member; and the groove is arranged along the length direction of the sampling member.

2. The sample container of claim 1, wherein the first limiting portion is arranged along the circumferential direction of the outer wall of the middle cover; the cross-sectional area of the first limiting portion gradually decreases from one end close to the first guide portion to one end away from the first guide portion; when the upper cover is connected with the middle cover, the second limiting portion is in abutting limiting connection with the side of the first limiting portion facing the first guide portion.

3. The sample container of claim 1, wherein the second guide portion is arranged along the circumferential direction of the outer wall of the middle cover; a second guide surface is formed on the side of the second guide portion facing the first guide portion; the second guide surface is arranged in a wave shape; and the shape of the first guide surface of the first guide portion matches the shape of the second guide surface of the second guide portion.

4. The sample container of claim 1, wherein Each of the first ribs has an extension part protruding from one end of the sampling member away from the transition passage; The extension part of each of the first ribs encloses a filtering space in communication with the sample gap.

5. The sample container of claim 4, wherein An outer wall of each of the extension parts is provided with a third guide surface, and a cross-sectional area of the extension part gradually decreases from one end close to the sampling member to one end away from the sampling member.

6. The sample container of claim 1, wherein A cross-sectional area of the one end of the sampling member located in the drainage passage gradually decreases from one end close to the transition passage to one end away from the transition passage.

7. The sample container of claim 1, wherein The one end of the sampling member away from the drainage passage extends into the container cavity through the transition passage. The one end of the sampling member away from the drainage passage is provided with a sampling groove.

8. The sample container of claim 1, wherein, A peripheral edge of the transition passage in communication with the drainage passage is provided with a sealing rib, the sealing rib is located in the transition passage and encloses a sealing groove with a side wall of the transition passage. The one end of the main body close to the upper cover is accommodated and limited in the sealing groove.

9. The sample container of claim 8, wherein, An outer wall of the sealing rib is provided with a fourth guide surface, and a cross-sectional area of the one end of the sealing rib close to the drainage passage is greater than a cross-sectional area of the one end of the sealing rib away from the drainage passage.

10. The sample container of claim 8, wherein, A side wall of the sealing groove facing the sealing rib is provided with a clearance surface, and an inner width of the one end of the sealing groove close to the drainage passage is smaller than an inner width of the one end of the sealing groove away from the drainage passage.

11. The sample container of claim 1, wherein An inner wall of the transition passage is provided with an inner thread, an outer wall of the one end of the main body close to the upper cover is provided with an outer thread, and the middle cover is screwed with the main body through cooperation of the inner thread and the outer thread. An inner width of the transition passage gradually increases from one end close to the drainage passage to one end away from the drainage passage.

12. The sample container of any one of claims 1 to 3, wherein, An inner wall of the upper cover is provided with a sealing column, the sealing column is inserted into the sampling passage and seals the sampling passage. And / or, an outer wall of the upper cover is provided with a glue breaking groove. And / or, an outer wall of the upper cover is provided with a rotation direction identifier.

13. The sample container of any one of claims 1 to 3, wherein, An outer wall of the one end of the main body close to the upper cover is provided with a limiting boss, and an end of the middle cover abuts against the limiting boss for limiting.

14. The sample container of any one of claims 1 to 3, wherein, A bottom space of the container cavity gradually contracts in a direction from a cavity opening of the container cavity to a bottom wall of the container cavity.

15. The sample container of any one of claims 1 to 3, wherein, The one end of the main body away from the cavity opening of the container cavity is provided with a support part. The support part is annularly arranged at an outer periphery of the bottom space of the container cavity, and a support plane is formed on one side of the support part away from the cavity opening of the container cavity.

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