Soft nose swab based on pneumatic growth and sampling method

Abstract

The invention relates to the field of medical instruments, in particular to a soft nose swab based on pneumatic growth and a sampling method.The soft nose swab comprises an axial driving section, an auxiliary supporting face section, a middle folding face section and a front-end brush section which are sequentially connected from back to front; the problem that an existing nose swab is poor in sampling experience due to lack of elasticity is solved. The risk of cross infection is easily caused by direct contact between medical staff and subjects, and automatic sampling cannot be realized; the axial driving end is used for realizing inflation in different sections to generate deformation so as to adapt to the movement in the sampling direction in the nasal cavity; force transmission of the nose swab in the using process is controlled through the auxiliary supporting surface section; automatic folding rotation is realized through the middle folding surface section; automatic sampling is realized while the sampling accuracy is improved through the brush section at the front end; through specific sampling method steps, cross infection is reduced; through gas pressure driving and structural design of different parts of the nose swab, a driving source is simplified; the safety risk is reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and more specifically, to a soft nasal swab based on pneumatic growth and a sampling method. Background Art

[0002] A nasal swab is a small tool used to collect material from the lining of the nasal cavity, which will be used for testing or experiments.

[0003] Existing nasal swabs are mainly small wooden sticks with a cotton swab at one end, and this end of the cotton swab is used for sampling. During the operation, the doctor usually holds the smooth end of the small wooden stick, inserts the cotton swab deep into the nostril and rotates it, and the liquid or solid matter on the inner wall of the nasal cavity is stained with the cotton swab and removed. The nasal swab of this structure is hard and lacks elasticity, which can easily poke the inner wall of the nasal cavity, and the subject will experience great pain during the sampling process. At the same time, the sampling process requires medical staff and subjects to come into contact, which poses a problem of cross infection.

[0004] How to achieve automatic sampling while improving the experience of the subjects and avoid cross-infection between medical staff and subjects is an urgent problem to be solved in this field. Summary of the invention

[0005] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide a soft nasal swab and sampling method based on pneumatic growth, which are used to solve the problems that the existing nasal swabs lack elasticity and are easy to poke the inner wall of the subject's nasal cavity, resulting in a poor sampling experience; direct contact between medical staff and subjects is prone to cross-infection risks and automatic sampling cannot be achieved.

[0006] The technical solution adopted by the present invention is to provide a soft nasal swab based on pneumatic growth, which includes an axial driving section, an auxiliary supporting surface section, an intermediate folding surface section and a front brush section connected in sequence from back to front, and the nasal swab is in a cavity shape, and the axial driving section is used to control the gas filling in the cavity and the sampling power of the nasal swab, the auxiliary supporting surface section is used to transmit the driving force of the axial driving section to the front brush section, the intermediate folding surface section is used to provide assistance for the transmitted driving force and provide a buffer for the pressure on the front brush section, and the front brush section is used to collect samples in the nasal cavity.

[0007] It is beneficial to inflate and deform the other different segments in the nasal swab through the axial driving segment to adapt to the movement in the sampling direction in the nasal cavity; provide support force through the auxiliary support surface segment to control the force transmission of the nasal swab during use; realize automatic folding and rotation of the nasal swab through the middle folding surface segment to avoid poking the nasal cavity and improve the subject's experience; automatically rotate and sample over a large area in the nasal cavity through the front brush segment, thereby improving the sampling accuracy and avoiding direct contact between medical staff and subjects, thereby realizing automatic sampling.

[0008] Furthermore, the front brush section is in the form of a spherical cavity, a plurality of brushes are evenly arranged on the surface of the spherical cavity, the bottom of the spherical cavity is connected to the middle folded surface section, and the top of the spherical cavity is in the form of a smooth plane.

[0009] It is beneficial to increase the contact area between the nasal swab and the inner wall of the nasal cavity through the multiple brushes arranged on the surface, thereby increasing the sample collection concentration; the front end brush segment is connected by the middle folding surface segment to enable the front end brush segment to achieve rotational sampling under its drive, shorten the sampling time, and improve the sampling efficiency; the resistance it encounters in the nasal cavity is transmitted axially to the middle folding surface segment through the smooth surface.

[0010] Furthermore, the middle folding surface section is a foldable cavity, which includes several layers of circular rings, and the diameter of each layer of circular rings decreases from back to front along the axial direction. When the middle folding surface section is squeezed from the front brush section, the multiple layers of circular rings are squeezed and overlapped and contracted from front to back along the axial direction.

[0011] It is beneficial to couple the sampling rotation and the front-end pressure together through the middle folding surface segment to achieve elastic sampling of the nasal swab and improve the subject experience; the telescopic overlapping of the middle folding surface segment along the axial direction is achieved through several layers of circular rings.

[0012] Furthermore, each layer of the circular ring includes multiple diamond-shaped faces, which are spliced ​​along the circumferential direction to form a circular ring. When the middle folding surface segment is squeezed by the front brush segment, the diamond-shaped faces on each layer of the circular ring convert the axial force into a tangential force, and the multiple layers of the circular ring are rotated and folded along the circumferential direction.

[0013] It is beneficial to convert the axial force into the tangential force through the splicing of multiple rhombus surfaces of each layer of the ring, so as to realize the automatic rotation of the front brush section.

[0014] Furthermore, the auxiliary support surface segment is a cylindrical cavity, the top of which is connected to the bottom of the middle folding surface segment, and the bottom of which is connected to the top of the axial drive segment. The axial length of the auxiliary support surface segment is H3, the axial length of the middle folding surface segment is H2, and the axial length of the front end brush segment is H1, H3>H1+H2.

[0015] The axial length of the auxiliary support surface segment is advantageously greater than the sum of the axial lengths of the middle folding surface segment and the front end brush segment, so that the auxiliary support surface segment can provide sufficient supporting force in the axial direction, thereby preventing the force transmitted axially downward by the middle folding surface segment.

[0016] Furthermore, the axial driving section is a drum-shaped cavity, which includes a top drum surface and a bottom drum surface with the same diameter. The bottom drum surface is connected to the pressurizing device through a ventilation pipe. After being pressurized by the pressurizing device, the axial driving section expands in the axial direction and pushes the front brush section forward.

[0017] It is beneficial to provide inflation power through the pressurizing device; the axial driving section provides a large-area base support force for the auxiliary support surface section, and at the same time provides a buffer space for the inflation of the nasal swab, so that the inflation deformation of each segment on the nasal swab can cooperate to complete the sampling task.

[0018] Furthermore, the diameter of the top drum surface is D4, the diameter of the auxiliary supporting surface segment is D3, the diameter of the bottom of the middle folding surface segment is D22, the diameter of the top of the middle folding surface segment is D21, the diameter of the brush formed at the outer edge of the front end brush segment is D1, the diameter of the ventilation pipe is D5, D4>D1>D3=D22>D21>D5.

[0019] It is beneficial to make the soft nasal swab realize different actions in each segment through the different diameters of each segment in the nasal swab, so as to deform to adapt to the internal environment of the nasal cavity; the small diameter of the ventilation tube is used to increase the inflation airflow speed, the diameter of the middle folding surface segment gradually decreases from the bottom to the top to realize axial overlap, the diameter of the outer edge of the brush is larger than the middle folding surface segment to increase the sampling contact area, and the diameter of the auxiliary support surface segment and the bottom of the middle folding surface segment are the same to realize the improvement of the pressure transmission efficiency along the axial direction.

[0020] A soft nasal swab sampling method based on pneumatic growth is also provided, wherein, according to the soft nasal swab, the following steps are included:

[0021] S1. The subject remains still, the soft nasal swab is replaced and fixed, and the nasal swab is placed close to the subject's nostrils through the robotic arm;

[0022] S2. Start the pressurizing device to inflate the soft nasal swab. After the axial drive segment, auxiliary support surface segment, middle folding surface segment, and front brush segment of the nasal swab are expanded in sequence, the front brush segment is extended into the nasal cavity to prepare for sampling;

[0023] S3. After the front brush segment is blocked at the sampling position inside the nasal cavity, the resistance is transmitted through the middle folded surface segment, so that the middle folded surface segment is folded downward and rotated in a circular direction;

[0024] S4. The front brush segment connected to the middle folding surface segment is driven to rotate to collect biological samples inside the nasal cavity;

[0025] S5. After the nasal swab is collected, the front brush section is placed in the collection box by the robotic arm, the pressurizing device is turned off, the soft nasal swab is removed, and preparations for the next sampling are made.

[0026] The above sampling method is beneficial to avoid contact between medical staff and subjects during the sampling process, reducing cross infection; through gas pressure drive and structural design of different parts of the nasal swab, one driving source can complete different actions in different stages, and the operation is simple; the soft material of the soft nasal swab reduces safety risks, and the deformation of the soft material can adapt to changes in the internal environment of the nasal cavity, so that the sampling area coverage effect is better.

[0027] The step S2 specifically includes:

[0028] S21. After the axial drive segment is inflated, the gas quickly enters the front brush segment through the cylindrical cavity, and the front brush segment extends into the nasal cavity;

[0029] S22. The axial drive segment and the auxiliary support surface segment provide support force for the middle folding surface segment. After continuous inflation, each layer of the ring in the middle folding surface segment is fully unfolded;

[0030] S23. The front end brush segment gradually goes deeper, and the forward resistance gradually increases. When reaching the sampling position inside the nasal cavity, the extrusion resistance of the front end brush segment is the largest, and the resistance is transferred to the middle folding surface segment.

[0031] It is beneficial to realize elastic sampling of the nasal swab through the specific action changes of the axial drive section, the auxiliary support surface section and the front brush section during inflation.

[0032] The step S3 specifically includes:

[0033] S31. The top of the front brush segment is smooth and flat. When it reaches the sampling position inside the nasal cavity, it is most obstructed. The smooth surface transmits the resistance axially to the top of the middle folded surface segment;

[0034] S32. The top of the middle folded surface segment transfers a portion of the resistance on its multi-layered rings in the axial direction to the bottom of the middle folded surface segment, and the multi-layered rings overlap in the axial direction under the action of this portion of the resistance;

[0035] S33. The top of the middle folding surface segment transfers another part of the resistance to the rhombus surface in each layer of the circular ring along the tangential direction. Since the bottom of the middle folding surface segment is connected to the auxiliary supporting surface segment, the auxiliary supporting surface segment provides a supporting force for the bottom of the middle folding surface segment and prevents this part of the resistance from continuing to be transmitted along the axial direction, so that the middle folding surface segment rotates along the tangential circumferential direction under the action of this part of the resistance.

[0036] It is beneficial to realize large-area rotation sampling by changing the specific movements of the middle folded surface segment at each stage according to the stress state.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows: the axial driving section is used to inflate and deform the other different segments in the nasal swab to adapt to the movement in the sampling direction in the nasal cavity; the auxiliary supporting surface segment is used to provide supporting force to control the force transmission of the nasal swab during use; the middle folding surface segment is used to realize the automatic folding and rotation of the nasal swab to avoid poking the nasal cavity and improve the subject's experience; the front end brush segment is used to automatically rotate a large area in the nasal cavity for sampling, which improves the sampling accuracy while avoiding direct contact between medical staff and subjects, thereby realizing automatic sampling; through specific sampling method steps, the contact between medical staff and subjects during the sampling process is avoided, reducing cross infection; through gas pressure drive and the structural design of different parts of the nasal swab, one driving source is used to complete different actions in different stages, and the operation method is simple; the soft material of the soft nasal swab is used to reduce safety risks, and the deformation of the soft material is used to adapt to changes in the internal environment of the nasal cavity, so that the sampling area coverage effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is the overall structure diagram of the present invention.

[0039] Figure 2 It is a schematic diagram of the expansion state of the soft nasal swab of the present invention.

[0040] Figure 3 It is a schematic diagram of the contracted state of the soft nasal swab of the present invention.

[0041] Description of the accompanying drawings: front end brush section 1, middle folding surface section 2, auxiliary support surface section 3, axial drive section 4. DETAILED DESCRIPTION

[0042] The drawings of the present invention are only for illustrative purposes and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted. Example 1

[0043] like Figure 1-3 As shown, this embodiment provides a soft nasal swab based on pneumatic growth, which includes an axial drive segment 4, an auxiliary support surface segment 3, an intermediate folding surface segment 2 and a front brush segment 1 which are sequentially connected from back to front, and the nasal swab is in a cavity shape, and the axial drive segment 4 is used to control the gas filling in the cavity and the sampling power of the nasal swab, the auxiliary support surface segment 3 is used to transmit the driving force of the axial drive segment 4 to the front brush segment 1, the intermediate folding surface segment 2 is used to provide assistance for the transmitted driving force and provide a buffer for the pressure on the front brush segment 1, and the front brush segment 1 is used to collect samples in the nasal cavity.

[0044] In this embodiment, the axial drive segment 4 provides an inflation power source for the nasal swab, so that the nasal swab starts sampling after being inflated, and provides a buffer for the inflation of the nasal swab. The auxiliary support surface segment 3 provides support force for the middle folding surface segment 2. The middle folding surface segment 2 provides axial and radial force changes for sampling, thereby driving the front brush segment 1 to achieve rotation and telescopic sampling. The front brush segment 1 directly contacts the subject's nasal cavity, and the brush increases the sampling contact area. The connection with the middle folding surface segment 2 allows the brush to elastically expand and contract and elastically rotate during the sampling process, thereby achieving automatic sampling and improving the sampling experience.

[0045] The front brush section 1 is in the form of a spherical cavity, a plurality of brushes are evenly arranged on the surface of the spherical cavity, the bottom of the spherical cavity is connected to the middle folding surface section 2, and the top of the spherical cavity is in the form of a smooth plane.

[0046] In this embodiment, there is no brush on the smooth surface, so that when the contact with the nasal cavity is blocked, the subject's tingling sensation will not be increased. At the same time, the smooth surface can completely transmit the resistance of the front brush segment 1 along the axial direction to avoid force dispersion. The multiple brushes evenly arranged on the surface of the spherical cavity greatly increase the sampling coverage area. When the front brush segment 1 is driven to rotate, the large-area brush can collect more samples at the same time.

[0047] The middle folding surface section 2 is a foldable cavity, which includes several layers of circular rings, and the diameter of each layer of circular rings decreases from back to front along the axial direction. When the middle folding surface section 2 is squeezed by the front brush section 1, the multiple layers of circular rings are squeezed and overlapped and contracted from front to back along the axial direction.

[0048] In this embodiment, the middle folding surface segment 2 includes four layers of circular rings. When the front end brush segment 1 is blocked in the nasal cavity, the smooth surface therein transfers the resistance axially to the middle folding surface segment 2. Since the top diameter of the middle folding surface segment 2 is small and the bottom diameter is large, the upper circular ring is folded downward after being squeezed until the multiple layers of circular rings are overlapped and shrunk.

[0049] Each layer of the ring includes multiple diamond-shaped faces, which are spliced ​​along the circumferential direction to form a ring. When the middle folding surface segment 2 is squeezed by the front brush segment 1, the diamond-shaped faces on each layer of the ring convert the axial force into a tangential force, and the multiple layers of the ring rotate and fold along the circumferential direction.

[0050] In this embodiment, the hypotenuses of the multiple rhombus faces on the ring are connected front and back, and the upper and lower parallel edges of the rhombus faces form the edges of the ring, so that the multiple layers of the ring remain parallel. When the middle folded surface segment 2 is subjected to axial pressure, a part of the force is unstable and deformed due to the special structure of the rhombus face, and the axial force is converted into a tangential force, driving the rotation of the rhombus face.

[0051] The auxiliary support surface segment 3 is a cylindrical cavity, the top of which is connected to the bottom of the middle folding surface segment 2, and the bottom of which is connected to the top of the axial drive segment 4. The axial length of the auxiliary support surface segment 3 is H3, the axial length of the middle folding surface segment 2 is H2, and the axial length of the front end brush segment 1 is H1, H3>H1+H2.

[0052] In this embodiment, the cylindrical cavity of the auxiliary support surface segment 3 always maintains a hard and fixed cylindrical shape, and can maintain high-strength support force regardless of the inflation state and force state of the middle folding surface segment 2 and the front brush segment 1, so as to control the movement in the sampling direction and limit the conduction of force in the axial direction when sampling is blocked. The longer the auxiliary support surface segment 3 is in the axial direction, the stronger the support force provided.

[0053] The axial driving section 4 is a drum-shaped cavity, which includes a top drum surface and a bottom drum surface with the same diameter. The bottom drum surface is connected to a pressurizing device through a vent pipe. After being pressurized by the pressurizing device, the axial driving section 4 expands in the axial direction and pushes the front brush section 1 forward.

[0054] In this embodiment, the top drum surface and the bottom drum surface of the axial driving section 4 have the same diameter. When the nasal swab is not inflated and is in a contracted state, the hard top drum surface and the hard auxiliary support surface section 3 maintain mutual support, and can be quickly deformed into place during the next inflation to enter the sampling state. The bottom drum surface quickly transfers the gas generated by the pressurizing device into the front brush section 1 along the shaped auxiliary support surface section 3 through the ventilation pipe, so as to achieve rapid sampling of the front brush section 1.

[0055] The diameter of the top drum surface is D4, the diameter of the auxiliary support surface segment 3 is D3, the diameter of the bottom of the middle folding surface segment 2 is D22, the diameter of the top of the middle folding surface segment 2 is D21, the diameter of the brush formed on the outer edge of the front brush segment 1 is D1, the diameter of the ventilation pipe is D5, D4>D1>D3=D22>D21>D5.

[0056] In this embodiment, the diameter of the ventilation tube is much smaller than the diameter of the drum surface of the axial drive section 4 to increase the airflow speed of the inflation. The diameter of the auxiliary support surface section 3 is about half of the diameter of the drum surface of the axial drive section 4. It can meet the diameter size of extending into the nasal cavity and provide sufficient supporting force between the middle folding surface section 2 and the axial drive section 4. The top diameter of the middle folding surface section 2 is slightly smaller than the bottom diameter of the middle folding surface section 2, and the difference between the two is the sum of the wall thickness of the three layers of circular rings. The diameter of the outer edge of the brush is larger than the middle folding surface section 2 and the auxiliary support surface section 3, so that the brush is in full contact with the inner wall of the nasal cavity after entering the nasal cavity to increase the sample collection concentration. Example 2

[0057] This embodiment also provides a soft nasal swab sampling method based on pneumatic growth, wherein, according to the soft nasal swab, the following steps are included:

[0058] S1. The subject remains still, the soft nasal swab is replaced and fixed, and the nasal swab is placed close to the subject's nostrils through the robotic arm;

[0059] S2. Start the pressurizing device to inflate the soft nasal swab. After the axial drive segment 4, the auxiliary support surface segment 3, the middle folding surface segment 2, and the front brush segment 1 in the nasal swab are expanded in sequence, the front brush segment 1 is extended into the nasal cavity to prepare for sampling;

[0060] S3. After the front brush segment 1 is blocked at the sampling position inside the nasal cavity, the resistance is transmitted through the middle folding surface segment 2, so that the middle folding surface segment 2 is folded downward and rotated in a circular direction;

[0061] S4. The front end brush segment 1 connected to the middle folding surface segment 2 is driven to rotate to collect biological samples inside the nasal cavity;

[0062] S5. After the nasal swab is collected, the front brush segment 1 is placed in the collection box by the robotic arm, the pressurizing device is turned off, the soft nasal swab is removed, and preparations for the next sampling are made.

[0063] The step S2 specifically includes:

[0064] S21. After the axial drive segment 4 is inflated, the gas quickly enters the front brush segment 1 through the cylindrical cavity, and the front brush segment 1 extends into the nasal cavity;

[0065] S22. The axial drive segment 4 and the auxiliary support surface segment 3 provide support force for the middle folding surface segment 2. After continuous inflation, each layer of the ring in the middle folding surface segment 2 is fully unfolded;

[0066] S23. The front end brush segment 1 gradually goes deeper, and the forward resistance gradually increases. When reaching the sampling position inside the nasal cavity, the extrusion resistance of the front end brush segment 1 is the largest, and the resistance is transmitted to the middle folding surface segment 2.

[0067] The step S3 specifically includes:

[0068] S31. The top of the front brush segment 1 is smooth and flat. When it reaches the sampling position inside the nasal cavity, it is most obstructed. The smooth surface transmits the resistance axially to the top of the middle folded surface segment 2;

[0069] S32. The top of the middle folding surface segment 2 transfers a portion of the resistance on its multi-layer ring in the axial direction to the bottom of the middle folding surface segment 2, and the multi-layer rings overlap in the axial direction under the action of this portion of the resistance;

[0070] S33. The top of the middle folding surface segment 2 transfers another part of the resistance to the rhombus surface in each layer of the circular ring along the tangential direction. Since the bottom of the middle folding surface segment 2 is connected to the auxiliary support surface segment 3, the auxiliary support surface segment 3 provides support force for the bottom of the middle folding surface segment 2 and prevents this part of the resistance from continuing to be transmitted along the axial direction, so that the middle folding surface segment 2 rotates along the tangential circumferential direction under the action of this part of the resistance.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A soft nasal swab based on pneumatic growth, characterized in that: The nasal swab comprises an axial driving section, an auxiliary supporting surface section, an intermediate folding surface section and a front end brush section which are sequentially connected from back to front. The nasal swab is in a cavity shape. The axial driving section is used to control the gas filling in the cavity and the sampling power of the nasal swab. The auxiliary supporting surface section is used to transmit the driving force of the axial driving section to the front end brush section. The intermediate folding surface section is used to assist the transmitted driving force and provide a buffer for the pressure on the front end brush section. The front end brush section is used to collect samples in the nasal cavity.

2. A soft nasal swab based on pneumatic growth according to claim 1, characterized in that: The front brush section is in the form of a spherical cavity, a plurality of brushes are evenly arranged on the surface of the spherical cavity, the bottom of the spherical cavity is connected to the middle folded surface section, and the top of the spherical cavity is in the form of a smooth plane.

3. A soft nasal swab based on pneumatic growth according to claim 1, characterized in that: The middle folding surface section is a foldable cavity, which includes several layers of circular rings, and the diameter of each layer of circular rings decreases from back to front along the axial direction. When the middle folding surface section is squeezed by the front brush section, the multiple layers of circular rings are squeezed and overlapped and contracted from front to back along the axial direction.

4. A soft nasal swab based on pneumatic growth according to claim 3, characterized in that: Each layer of the circular ring includes a plurality of rhombus faces, which are spliced ​​in the circumferential direction to form a circular ring. When the middle folding surface segment is squeezed by the front brush segment, the rhombus faces on each layer of the circular ring convert the axial force into a tangential force, and the multiple layers of the circular ring rotate and fold in the circumferential direction.

5. The soft nasal swab based on pneumatic growth according to claim 1, characterized in that: The auxiliary support surface segment is a cylindrical cavity, the top of which is connected to the bottom of the middle folding surface segment, and the bottom of which is connected to the top of the axial drive segment. The axial length of the auxiliary support surface segment is H3, the axial length of the middle folding surface segment is H2, and the axial length of the front end brush segment is H1, H3>H1+H2.

6. A soft nasal swab based on pneumatic growth according to claim 2, characterized in that: The axial driving section is a drum-shaped cavity, which includes a top drum surface and a bottom drum surface with the same diameter. The bottom drum surface is connected to the pressurizing device through a ventilation pipe. After being pressurized by the pressurizing device, the axial driving section expands in the axial direction and pushes the front brush section forward.

7. A soft nasal swab based on pneumatic growth according to claim 6, characterized in that: The diameter of the top drum surface is D4, the diameter of the auxiliary support surface segment is D3, the diameter of the bottom of the middle folding surface segment is D22, the diameter of the top of the middle folding surface segment is D21, the diameter of the brush formed at the outer edge of the front end brush segment is D1, the diameter of the ventilation pipe is D5, D4>D1>D3=D22>D21>D5.

8. A soft nasal swab sampling method based on pneumatic growth, characterized in that: The soft nasal swab according to any one of claims 1 to 7, comprising the following steps: S1. The subject remains still, the soft nasal swab is replaced and fixed, and the nasal swab is placed close to the subject's nostrils through the robotic arm; S2. Start the pressurizing device to inflate the soft nasal swab. After the axial drive segment, auxiliary support surface segment, middle folding surface segment, and front brush segment of the nasal swab are expanded in sequence, the front brush segment is extended into the nasal cavity to prepare for sampling; S3. After the front brush segment is blocked at the sampling position inside the nasal cavity, the resistance is transmitted through the middle folded surface segment, so that the middle folded surface segment is folded downward and rotated in a circular direction; S4. The front brush segment connected to the middle folding surface segment is driven to rotate to collect biological samples inside the nasal cavity; S5. After the nasal swab is collected, the front brush section is placed in the collection box by the robotic arm, the pressurizing device is turned off, the soft nasal swab is removed, and preparations for the next sampling are made.

9. The sampling method according to claim 8, characterized in that: The step S2 specifically includes: S21. After the axial drive segment is inflated, the gas quickly enters the front brush segment through the cylindrical cavity, and the front brush segment extends into the nasal cavity; S22. The axial drive segment and the auxiliary support surface segment provide support force for the middle folding surface segment. After continuous inflation, each layer of the ring in the middle folding surface segment is fully unfolded; S23. The front end brush segment gradually goes deeper, and the forward resistance gradually increases. When reaching the sampling position inside the nasal cavity, the extrusion resistance of the front end brush segment is the largest, and the resistance is transferred to the middle folding surface segment.

10. The sampling method according to claim 8, characterized in that: The step S3 specifically includes: S31. The top of the front brush segment is smooth and flat. When it reaches the sampling position inside the nasal cavity, it is most obstructed. The smooth surface transmits the resistance axially to the top of the middle folded surface segment; S32. The top of the middle folded surface segment transfers a portion of the resistance on its multi-layered rings in the axial direction to the bottom of the middle folded surface segment, and the multi-layered rings overlap in the axial direction under the action of this portion of the resistance; S33. The top of the middle folding surface segment transfers another part of the resistance to the rhombus surface in each layer of the circular ring along the tangential direction. Since the bottom of the middle folding surface segment is connected to the auxiliary supporting surface segment, the auxiliary supporting surface segment provides a supporting force for the bottom of the middle folding surface segment and prevents this part of the resistance from continuing to be transmitted along the axial direction, so that the middle folding surface segment rotates along the tangential circumferential direction under the action of this part of the resistance.

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