Automatic elution nasopharynx swab

Abstract

The invention provides an automatic elution nasopharynx swab, and belongs to the technical field of medical instruments. The automatic elution nasopharynx swab comprises a swab rod and an elution device, a sampling head is arranged at one end of the swab rod, the elution device comprises a shell, an elution cavity is formed in the shell, eluent is arranged in the elution cavity, an elution mechanism is arranged in the middle of the elution cavity, open holes communicated with the elution cavity are formed in the two ends of the shell, and the sampling head is arranged at the other end of the swab rod. A sealing mechanism is arranged on one side of the open hole, a collecting mechanism is arranged at one end of the shell, and a liquid taking mechanism is arranged on the side wall of the other end of the shell. The hole is formed, the swab rod can penetrate through the whole shell of the elution device and enter the nasopharynx of a sampled person for sample collection, in the process of drawing out the swab rod, the elution mechanism extrudes the sampling head, so that the sample and eluent are fully mixed and eluted, sampling and elution are directly completed, the operation process is simple, and the operation efficiency is high. And the risk of sample pollution is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more particularly to an automatic elution nasopharyngeal swab. Background Art

[0002] In the field of medical diagnosis, rapid antigen detection of respiratory viruses occupies an extremely important position. From the perspective of medical diagnosis, it can provide key evidence for the diagnosis of the disease and help doctors quickly formulate accurate treatment plans; in terms of patient management, it helps to classify patients and provide targeted care in a timely manner, thereby improving treatment effects; in guiding clinical drug use, it allows doctors to rationally select drugs based on test results and avoid blind medication; in controlling the route of transmission, rapid testing can promptly detect the source of infection, thereby effectively taking isolation and other prevention and control measures to cut off the transmission chain; from a public health perspective, it can monitor and warn of the epidemic trends of respiratory infectious diseases, providing data support for the formulation of prevention and control strategies.

[0003] With the continuous iteration of technology and the continuous improvement of test kits, rapid antigen testing has made significant progress in operational convenience. Today, the test does not require reliance on a special laboratory environment and professional testing personnel. It can be completed by doctors or nurses in outpatient clinics of medical institutions, or patients can conduct the test themselves at home. This change has greatly improved the utilization efficiency of medical resources, especially during the high incidence period of respiratory infectious diseases, effectively alleviating the problem of insufficient testing capabilities of the laboratory department, and providing strong support for the efficient operation of the medical system.

[0004] However, virus sample elution, as an indispensable key step in antigen detection, still has many problems that need to be solved. The existing nasopharyngeal swab sampling and sample processing processes mostly rely on manual operations. After the swab is completed, the nasopharyngeal swab must be immediately placed in a sampling tube containing a preservation fluid and the swab must be rotated forcefully several times to promote its thorough mixing with the processing fluid. The swab head must then be squeezed through the outer wall of the sampling tube to ensure that the viral antigens in the sample can be fully released into the preservation fluid. However, this traditional method has a series of disadvantages.

[0005] The existing virus sampling and sample elution process covers multiple steps and the operation process is complicated, which undoubtedly places high demands on the operator's skill level. Any improper operation may affect the accuracy of the test results. The nasopharyngeal swab needs to be placed and waited after sampling, and in the process of manually opening the sample eluent, external contaminants are easily introduced, increasing the risk of sample contamination. The standardized operation requirements for the operating environment and personnel are extremely strict. In the virus sample elution link, due to differences in operating techniques or unreasonable selection of eluents, the virus is often unable to be completely released from the sample, which in turn affects the sensitivity and reliability of the test results.

[0006] In response to the shortcomings of existing technologies, many existing technologies have been explored. For example, the invention patent with authorization announcement number CN114305515B proposes a throat swab sampling device and a throat swab sampling system. Through the preservation design of the throat swab storage tube and the later automatic clamping function, it provides certain ideas for the intelligentization and automation of the throat swab sampling process. However, the throat swab sampling and post-sampling elution process of this patent have not been effectively optimized and simplified. During the operation, it is still difficult to effectively avoid the risk of contamination of samples, and the overall solution is not perfect. The invention patent with authorization announcement number CN111673743B designs a throat swab collection robot, which enables manual operation of the robot through the control terminal to drive the mechanical arm to complete the collection of pharyngeal specimens; however, the research and development, manufacturing and maintenance costs of this robot are high, and it is only suitable for institutional configuration. It is difficult to popularize and promote it to the public, and there are obvious deficiencies in convenience. The utility model patent with authorization announcement number CN221932006U provides a throat swab collector, which mainly improves the sampling efficiency by improving the morphological design of the sampling device and increasing the sampling area covered by the deformable part, and to a certain extent reduces the discomfort caused to the sampled subject by the sampling operation. However, this patent does not solve the core problems such as contamination and infection during nasopharyngeal swab sampling and sample processing, as well as the cumbersome elution operation. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an automatic elution nasopharyngeal swab to solve the problem that the existing nasopharyngeal swab sampling and sample processing processes mostly rely on manual operations, the operating steps are cumbersome, the operating environment and personnel's standardized operating requirements are extremely strict, and the samples are easily contaminated.

[0008] In order to solve the above problems, the present invention adopts the following technical solutions:

[0009] An automatic elution nasopharyngeal swab comprises a swab rod and an elution device, wherein a sampling head is provided at one end of the swab rod, and the elution device comprises a shell, an elution chamber is provided inside the shell, and an eluent is provided in the elution chamber, an elution mechanism is provided in the middle of the elution chamber, both ends of the shell are provided with openings connected to the elution chamber, a sealing mechanism is provided on one side of the opening, a collection mechanism is provided at one end of the shell, and a liquid collection mechanism is provided on the side wall of the other end of the shell.

[0010] Wherein, an observation window is provided on the side wall of the shell at one end close to the liquid extraction mechanism, and a transparent elastic extrusion plate is installed on the inner side of the observation window.

[0011] The elution mechanism includes a mounting ring sleeve, which is fixedly mounted in the elution cavity. A base plate is provided inside the mounting ring sleeve, which is arranged in a ring shape. An elastic extrusion rubber plate is fixedly connected to the inner side of the base plate.

[0012] In which, the liquid collection mechanism includes a liquid drainage bucket, which is arranged on the side wall of the shell and is connected to the elution chamber. A sealing plug is installed at the bottom of the liquid drainage bucket, and an anti-loss rope is fixedly connected to the outside of the sealing plug. The end of the anti-loss rope away from the sealing plug is fixedly connected to the shell.

[0013] Wherein, a sealing plug is provided at the top end of the sealing plug, and a guide cone block is provided at the top end of the sealing plug. The sealing plug is in the shape of an inverted cone, and the guide cone block is in the shape of a cone.

[0014] In which, the sealing mechanism includes a sealing plate, which is arranged on the side of the opening away from the collecting mechanism, and the sealing plate is provided with a filling plug adapted to the opening; the sealing mechanism also includes a hinged seat arranged next to the sealing plate, the hinged seat is fixedly connected to the shell, a support rod is installed on the hinged seat, a rotating shaft is sleeved on the support rod, the rotating shaft is rotatably connected to the support rod, and the rotating shaft is fixedly connected to the sealing plate.

[0015] Among them, a mounting groove is opened on the inner side of the hinge seat, a torsion spring is arranged in the mounting groove, and the torsion spring is sleeved on the outer side of the support rod. One end of the torsion spring is fixed in the mounting groove, and the other end is fixedly connected to the rotating shaft.

[0016] In which, the collection mechanism includes a collection shell, the collection shell is fixedly connected to the shell, guide rails are provided on both sides of the collection shell, a push plate is slidably connected to the inside of the guide rail, a pressing plate is provided on the outside of the push plate, an arc-shaped shearing blade is provided on the inside of the push plate, and the arc-shaped shearing blade is located inside the collection shell. A telescopic spring is also provided on the inside of the push plate, one end of the telescopic spring is connected to the push plate, and the other end is connected to the inner wall of the collection shell.

[0017] A through-hole is provided at the end of the collecting shell, a sealing plate is provided on the outside of the through-hole, a magnetic ring is provided on the inside of the sealing plate and the outside of the collecting shell, and the sealing plate can be adsorbed on the outside of the through-hole through the magnetic ring.

[0018] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0019] In the above scheme, by setting an opening, the swab rod can pass through the entire shell of the elution device and enter the nasopharynx of the person being sampled to collect samples. In the process of pulling out the swab rod, the elution mechanism will squeeze the sampling head to fully mix and elute the sample and the eluent, and directly complete the sampling and elution. The operation process is simple and effectively avoids the risk of sample contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0023] Figure 3 It is a bottom view structural schematic diagram of the present invention;

[0024] Figure 4 Schematic diagram of the internal structure of the housing of the present invention;

[0025] Figure 5 Schematic diagram of the internal structure of the collection mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the sealing mechanism of the present invention in a disassembled state;

[0027] Figure 7 This is a schematic diagram of the push plate and telescopic spring structure of the present invention;

[0028] Figure 8 for Figure 4 Schematic diagram of the structure at A in the middle;

[0029] Figure 9 It is a schematic diagram of the sealing plug structure of the present invention.

[0030] [Reference Signs]

[0031] 1. Swab holder;

[0032] 2. Elution device; 21. Housing; 22. Opening;

[0033] 23. Collection mechanism; 231. Collection shell; 232. Guide rail; 233. Blocking plate; 234. Push plate; 235. Arc-shaped shearing blade; 236. Telescopic spring; 237. Perforation; 238. Pressing plate;

[0034] 24. Elution cavity;

[0035] 25. Liquid collection mechanism; 251. Liquid discharge hopper; 252. Sealing plug; 253. Anti-lost rope; 254. Sealing plug; 255. Guide cone block;

[0036] 26. Sealing mechanism; 261. Articulated seat; 262. Mounting slot; 263. Torsion spring; 264. Rotating shaft; 265. Sealing plate; 266. Filling plug;

[0037] 27. Elution mechanism; 271. Mounting ring; 272. Base plate; 273. Elastic extrusion rubber plate;

[0038] 28. Anti-slip convex ring; 29. ​​Observation window;

[0039] 3. Sampling head;

[0040] 4. Transparent elastic extrusion plate.

[0041] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0042] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0043] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0044] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0045] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0046] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0047] like Figures 1 to 9 As shown, an embodiment of the present invention provides an automatic elution nasopharyngeal swab, including a swab rod 1 and an elution device 2. A sampling head 3 is provided at one end of the swab rod 1, and the elution device 2 includes a shell 21. An elution chamber 24 is provided inside the shell 21, and an eluent is provided in the elution chamber 24. An elution mechanism 27 is provided in the middle of the elution chamber 24. Openings 22 connected to the elution chamber 24 are provided at both ends of the shell 21, and a sealing mechanism 26 is provided on one side of the opening 22. A collecting mechanism 23 is provided at one end of the shell 21, and a liquid collection mechanism 25 is provided on the side wall of the other end of the shell 21.

[0048] like Figures 1 to 5 As shown, the outer surface of the housing 21 is provided with anti-slip ridges 28 at equal intervals. A sidewall of the housing 21, located near the end of the liquid extraction mechanism 25, is provided with two symmetrically arranged observation windows 29. A transparent elastic extrusion plate 4 made of transparent silicone rubber is mounted within the observation windows 29. The anti-slip ridges 28 effectively increase friction when the operator holds the device, preventing slippage and the device from falling during operation, thereby ensuring operational stability. The observation windows 29 facilitate intuitive observation of conditions within the elution chamber 24, such as the remaining amount of eluent and the mixing state of the sample and eluent. The transparent elastic extrusion plate 4 is not only transparent for easy observation but also flexible. When the eluent needs to be squeezed out, squeezing the transparent elastic extrusion plate 4 applies pressure to the eluent within the elution chamber 24, prompting it to be discharged from the liquid extraction mechanism 25.

[0049] The elution mechanism 27 includes a mounting ring 271, which is fixedly mounted within the elution chamber 24. A base plate 272 is disposed within the mounting ring 271. The base plates 272 are arranged in a ring shape at equal intervals. An elastic extrusion rubber plate 273 is fixedly connected to the inner side of the base plate 272. When the swab holder 1 carrying the sampling head 3 is inserted into the elution chamber 24, the elastic extrusion rubber plate 273 is squeezed and deformed. During the withdrawal of the sampling head 3, the elastic extrusion rubber plate 273 rebounds, and the operator can rotate the swab holder 1. At this time, the elastic extrusion rubber plate 273 acts like an elastic bristle structure, fully squeezing the sampling head 3, promoting uniform mixing of the human mucus tissue collected from the sampling head 3 with the eluent, achieving sufficient contact between the sample and the processing liquid and uniform mixing and elution, thereby ensuring efficient and uniform sample elution.

[0050] like Figure 1 、 Figure 8 and Figure 9 As shown, the liquid extraction mechanism 25 includes a liquid drain hopper 251, which is arranged on the side wall of the housing 21 and is connected to the elution chamber 24. A sealing plug 252 is installed at the bottom of the liquid drain hopper 251. An anti-lost rope 253 is fixedly connected to the outer side of the sealing plug 252, and the end of the anti-lost rope 253 away from the sealing plug 252 is fixedly connected to the housing 21. A sealing plug 254 is provided at the top of the sealing plug 252, and a guide cone block 255 is provided at the top of the sealing plug 254. The sealing plug 254 is in the shape of an inverted cone, and the guide cone block 255 is in the shape of a cone. The sealing plug 254 and the guide cone block 255 are both made of elastic sealing silicone material.

[0051] When the elution is completed and the liquid needs to be taken out, the operator pulls the anti-lost rope 253 to drive the sealing plug 252 to be pulled out from the bottom of the drainage bucket 251, opening the drainage bucket 251, and then squeezes the transparent elastic squeezing plate 4 inside the observation window 29 to apply pressure to the eluate in the elution chamber 24, so that the eluate flows out through the drainage bucket 251 for subsequent detection; after the liquid is taken out, the sealing plug 254 is moved toward the drainage bucket 251. The guide cone block 255, due to its conical structure, plays a guiding role when approaching the drainage bucket 251, making it convenient and accurate to insert the sealing plug 254 into the drainage bucket 251. Since the sealing plug 254 is an inverted cone and both the guide cone block 255 and the guide cone block 255 are made of elastic sealing silicone material, they can fit tightly against the inner wall of the drainage bucket 251 after insertion, achieving a good sealing effect and preventing eluate leakage. The anti-lost rope 253 prevents the sealing plug 252 from being lost during operation, making it convenient to quickly find and operate it the next time it is used.

[0052] like Figure 4 、 Figure 6 and Figure 8As shown, the sealing mechanism 26 includes a sealing plate 265, which is arranged on the side of the opening 22 away from the collecting mechanism 23, and the sealing plate 265 is provided with a filling plug 266 for blocking the opening 22, and the filling plug 266 is adapted to the opening 22 and is specifically hemispherical; the sealing mechanism 26 also includes a hinged seat 261 arranged next to the sealing plate 265, the hinged seat 261 is fixedly connected to the shell 21, a support rod is installed on the hinged seat 261, and a rotating shaft 264 is sleeved on the support rod, the rotating shaft 264 is rotatably connected to the support rod, and the rotating shaft 264 is fixedly connected to the sealing plate 265; a mounting groove 262 is relatively opened on the inner side of the hinged seat 261, and a torsion spring 263 is provided in the mounting groove 262, and the torsion spring 263 is sleeved on the outer side of the support rod, one end of the torsion spring 263 is fixed in the mounting groove 262, and the other end is fixedly connected to the rotating shaft 264.

[0053] When the swab rod 1 with the sampling head 3 is inserted into the shell 21, the sampling head 3 will first contact the sealing plate 265 near one end of the collecting mechanism 23 and the filling plug 266 thereon. The sealing plate 265 is squeezed, driving the rotating shaft 264 connected thereto to rotate in the hinge seat 261. At this time, the rotating shaft 264 squeezes the torsion spring 263 in the mounting groove 262 to store elastic potential energy. When the sealing plate 265 is pushed open and the filling plug 266 leaves the corresponding opening 22, the sampling head 3 can pass through the opening 22 and enter the elution chamber 24. As the sampling head 3 continues to The sampling head 3 will go deeper into the elution chamber 24, push open the sealing plate 265 at the other end, and thus pass through the entire shell 21 and enter the nasopharynx of the person being sampled to collect samples; when the sampling is completed, the swab rod 1 is pulled out of the shell 21. Since the sealing plate 265 loses the squeezing force of the sampling head 3, the compressed torsion spring 263 will release its elastic potential energy, pushing the rotating shaft 264 to rotate in the opposite direction, thereby driving the sealing plate 265 to re-cover the opening 22, and the filling plug 266 will also re-block the opening 22, realizing automatic sealing of the opening 22. During the process of inserting the swab rod 1 into the elution chamber 24, since the swab rod 1 is located inside the opening 22 and the eluent has a certain viscosity, the eluent will not overflow from the opening 22. During the process of the swab rod 1 entering and exiting the shell 21, the sealing mechanism 26 can automatically reseal, effectively avoiding the leakage of the eluent and the collected bacteria, minimizing the risk of virus and bacteria leakage, and effectively preventing external contaminants from entering, thereby ensuring the stability and safety of the internal environment of the device.

[0054] like Figures 1 to 5 and Figure 7As shown, the collection mechanism 23 includes a collection shell 231, which is fixedly connected to the housing 21. Guide rails 232 are provided on both sides of the collection shell 231. A push plate 234 is slidably connected to the interior of the guide rails 232. A pressing plate 238 is provided on the exterior of the push plate 234. An arcuate shearing blade 235 is provided on the interior of the push plate 234. The arcuate shearing blade 235 is located inside the collection shell 231. Two telescopic springs 236 are fixedly connected to the interior of each push plate 234. The two telescopic springs 236 are symmetrically arranged on either side of the corresponding arcuate shearing blade 235. One end of the telescopic spring 236 is connected to the push plate 234, and the other end is connected to the inner wall of the collection shell 231. During the sampling process, the telescopic spring 236 is in a naturally extended state, and the arcuate shearing blade 235 is away from the path of the sampling head 3, so as not to affect the sampling operation. A through-hole 237 is provided at the end of the collecting shell 231, and a sealing plate 233 is provided on the outside of the through-hole 237. The sealing plate 233 is rotatably connected to the collecting shell 231, and a magnetic ring is provided on the inner side of the sealing plate 233 and the outer side of the collecting shell 231. The sealing plate 233 can be adsorbed on the outside of the through-hole 237 through the magnetic ring.

[0055] After the sample elution is completed, if the sampling head 3 needs to be collected and processed, the operator can squeeze the pressing plate 238, and the pressing plate 238 drives the push plate 234 to slide inward along the guide rail 232, and the arc-shaped shearing blade 235 also moves accordingly. When the arc-shaped shearing blade 235 moves to the sampling head 3, the swab rod 1 is pulled hard to cut off the sampling head 3, and the cut sampling head 3 falls into the collection shell 231. After releasing the pressing plate 238, the telescopic spring 236 will push the push plate 234 to move outward and restore the initial state. When the collection is completed, the sealing plate 233 is rotated to close the perforation 237 to prevent the sampling head 3 from leaking. The sealing plate 233 is subsequently opened to discharge the sampling head 3 in the collection shell 231 for centralized processing.

[0056] The workflow of the technical solution provided by the present invention is as follows:

[0057] During use, the operator inserts the swab rod 1 into the perforation 237, and the sampling head 3 at the front end of the swab rod 1 will apply an extrusion force to the sealing plate 265 and the filling plug 266 near one end of the collection mechanism 23, so that the first sealing plate 265 is smoothly stretched. As the sampling head 3 continues to go deeper, the sampling head 3 will push the sealing plate 265 at the other end, smoothly pass through the elution cavity 24 and the entire shell 21, and be inserted into the nasopharynx of the sampled person for sample collection; in the process of completing the sampling and pulling out the sampling head 3, the elastic extrusion rubber plate 273 will apply an extrusion force to the sampling head 3. During this process, by rotating the swab rod 1, the human mucus tissue collected on the sampling head 3 can be evenly mixed with the eluent inside the elution cavity 24.

[0058] When the sample and the eluent are mixed and the liquid needs to be taken out, the anti-loss rope 253 is pulled to drive the sealing plug 252 to be pulled out from the inside of the liquid drain hopper 251, and then the transparent elastic squeezing plate 4 is squeezed to squeeze the eluent inside the shell 21 out of the liquid drain hopper 251 to achieve rapid liquid collection; after the liquid collection is completed, under the action of the guide cone block 255, the sealing plug 254 can be conveniently and accurately inserted into the inside of the liquid drain hopper 251.

[0059] When the sampling head 3 needs to be collected and processed, the pressing plate 238 is squeezed to drive the push plate 234 and the arc-shaped shearing blade 235 to move inward until the arc-shaped shearing blade 235 is stably attached to the sampling head 3. At this time, the sampling head 3 can be cut off by pulling the swab rod 1 forcefully, so that the sampling head 3 is collected inside the collection shell 231.

[0060] In the above scheme, the automatic elution nasopharyngeal swab has high convenience, safety and sealing performance; by setting the opening, the swab rod can pass through the entire shell of the elution device and enter the nasopharynx of the sampled person to collect samples. In the process of pulling out the swab rod, the elution mechanism will squeeze the sampling head to make the sample and eluent fully mixed and eluted, and the sampling and elution are completed directly. The operation process is simple and effectively avoids the risk of sample contamination; by setting a collection mechanism to collect the sampling head, it can be avoided that the sampling head is directly extracted and may cause viral and bacterial contamination. The sealing mechanism can adaptively seal after the swab rod is pulled out to avoid leakage of eluent and bacteria. By setting a liquid collection mechanism, rapid liquid collection can be achieved.

[0061] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. While specific details are described in detail in the preferred embodiments to provide a thorough understanding of the present invention, those skilled in the art will be able to fully understand the present invention without these details. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An automatic elution nasopharyngeal swab, comprising a swab rod and an elution device, wherein a sampling head is provided at one end of the swab rod, characterized in that: The elution device includes a shell, an elution chamber is provided inside the shell, an elution liquid is provided in the elution chamber, an elution mechanism is provided in the middle of the elution chamber, both ends of the shell are provided with openings connected to the elution chamber, a sealing mechanism is provided on one side of the opening, a collection mechanism is provided at one end of the shell, and a liquid collection mechanism is provided on the side wall of the other end of the shell.

2. The automatic elution nasopharyngeal swab according to claim 1, characterized in that: An observation window is provided on the side wall of the shell at one end close to the liquid taking mechanism, and a transparent elastic extrusion plate is installed on the inner side of the observation window.

3. The automatic elution nasopharyngeal swab according to claim 1, characterized in that: The elution mechanism comprises a mounting ring sleeve, which is fixedly mounted in the elution cavity. A base plate is provided inside the mounting ring sleeve, and the base plate is arranged in a ring shape. An elastic extrusion rubber plate is fixedly connected to the inner side of the base plate.

4. The automatic elution nasopharyngeal swab according to claim 1, characterized in that: The liquid collection mechanism includes a liquid drainage hopper, which is arranged on the side wall of the shell and is connected to the elution chamber. A sealing plug is installed at the bottom of the liquid drainage hopper, and an anti-loss rope is fixedly connected to the outside of the sealing plug. The end of the anti-loss rope away from the sealing plug is fixedly connected to the shell.

5. The automatic elution nasopharyngeal swab according to claim 4, characterized in that: A sealing plug is provided at the top end of the sealing plug, and a guide cone block is provided at the top end of the sealing plug. The sealing plug is in the shape of an inverted cone, and the guide cone block is in the shape of a cone.

6. The automatic elution nasopharyngeal swab according to claim 1, characterized in that: The sealing mechanism includes a sealing plate, which is arranged on a side of the opening away from the collecting mechanism, and a filling plug adapted to the opening is provided on the sealing plate; The sealing mechanism also includes a hinge seat arranged beside the sealing plate, the hinge seat is fixedly connected to the shell, a support rod is installed on the hinge seat, a rotating shaft is sleeved on the support rod, the rotating shaft is rotatably connected to the support rod, and the rotating shaft is fixedly connected to the sealing plate.

7. The automatic elution nasopharyngeal swab according to claim 6, characterized in that: A mounting groove is provided on the inner side of the hinge seat, a torsion spring is provided in the mounting groove, and the torsion spring is sleeved on the outer side of the support rod. One end of the torsion spring is fixed in the mounting groove, and the other end is fixedly connected to the rotating shaft.

8. The automatic elution nasopharyngeal swab according to claim 1, characterized in that: The collecting mechanism includes a collecting shell, which is fixedly connected to the shell body, guide rails are provided on both sides of the collecting shell, a push plate is slidably connected to the inside of the guide rail, a pressing plate is provided on the outside of the push plate, an arc-shaped shearing blade is provided on the inside of the push plate, and the arc-shaped shearing blade is located inside the collecting shell. A telescopic spring is also provided on the inside of the push plate, one end of the telescopic spring is connected to the push plate, and the other end is connected to the inner wall of the collecting shell.

9. The automatic elution nasopharyngeal swab according to claim 8, characterized in that: A through-hole is provided at the end of the collecting shell, and a sealing plate is provided on the outside of the through-hole. The sealing plate is rotatably connected to the collecting shell, and magnetic rings are provided on the inner side of the sealing plate and the outer side of the collecting shell. The sealing plate can be adsorbed on the outside of the through-hole through the magnetic ring.

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