Sealing member, sampling device, and sampling system

Abstract

The present disclosure relates to the field of medical devices, and particularly, a sealing member, a sampling device, and a sampling system. The sealing member (2) is housed within the sampling device (200) and is configured to seal and connect a body (1) of the sampling device (200) and a suction connector (4) for an endoscope (100). The sealing member (2) has a connecting cavity (21) configured to receive the suction connector (4). The outer side wall and / or inner side wall of the sealing member (2) is provided with a protruding structure (23) arranged circumferentially around the sealing member (2). When the suction connector (4) is received in the body (1), a portion of the suction connector (4) extends into the connecting cavity (21) and, together with the body (1), compresses the sealing member (2). The sealing member (2) deforms to achieve a sealing connection between the suction connector (4) and the body (1). By providing the protruding structure, the suction connector applies an expansive force on the sealing member, enhancing the contact strength between the protruding structure and the inner wall of the housing cavity, and thereby improving the sealing effect. Similarly, the reactive force applied by the inner wall of the housing cavity on the protruding structure increases the contact strength between the protruding structure and the suction connector, further enhancing the sealing effect.

Description

Seals, sampling devices and sampling systems Technical Field

[0001] The invention relates to a sealing element, a sampling device and a sampling system, and belongs to the technical field of medical devices. Background Art

[0002] Currently, when examining patients for diseases, medical devices are usually inserted into the patient's body for preliminary examination. At the same time, samples of tissue or other substances in the patient's body are taken to facilitate rigorous examination by medical staff.

[0003] The existing sampling device is detachably connected to the medical device through a seal. When sampling is required, the sampling device is connected to the end of the medical device to sample tissues or other substances in the patient's body. However, the sealing effect between the existing sampling device and the medical device is poor. On the one hand, it will cause the sample to overflow from the seal during sampling. If there is a virus in the sample, it will pose a potential threat to medical staff; on the other hand, it will cause poor airtightness during the suction process, making it impossible for the sampling device to obtain the sample.

[0004] In view of this, it is indeed necessary to improve the sampling device to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a sealing member, a sampling device and a sampling system to solve the problem of poor sealing performance between the sampling device and the medical device in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides a sealing member, which is housed in a sampling device and is used to seal and connect the main body of the sampling device and the suction interface of an endoscope. The sealing member has a connecting cavity for plugging the suction interface. A protruding structure is provided on the outer wall and / or inner wall of the sealing member. The protruding structure is arranged around the circumference of the sealing member. When the suction interface is plugged into the main body, part of the suction interface extends into the connecting cavity and squeezes the sealing member together with the main body. The sealing member deforms to achieve a sealed connection between the suction interface and the main body.

[0007] As a further improvement of the present invention, the sealing member is configured in a truncated cone shape;

[0008] And / or, there are at least two protruding structures, and the at least two protruding structures are evenly distributed on the outer wall surface of the sealing member;

[0009] And / or, the sealing member is made of an elastic material, and the sealing member is interference fit with the main body.

[0010] As a further improvement of the present invention, the protruding structure is a protruding ring, or the protruding structure includes a plurality of protruding units distributed at intervals along the circumference of the sealing member.

[0011] As a further improvement of the present invention, the connecting cavity includes a first channel and a second channel that are interconnected, the first channel is a cylindrical hole, the second channel extends in a contracting manner toward the first channel, and the minimum diameter of the second channel is not less than the maximum diameter of the first channel.

[0012] As a further improvement of the present invention, the connecting cavity further includes a third channel connected to the second channel, the third channel extends in a contracting manner toward the second channel, and the minimum diameter of the third channel is not less than the maximum diameter of the second channel.

[0013] As a further improvement of the present invention, the sealing member includes a raised structure provided on its outer wall surface and located in a setting area. The setting area is an area between one end of the sealing member close to the first channel and the front end of the suction interface when the suction interface is accommodated in the connecting cavity.

[0014] To achieve the above objectives, the present invention provides a sampling device, comprising a main body and a sealing member accommodated in the main body, wherein a receiving cavity is provided in the main body, the sealing member is accommodated in the receiving cavity, and the protruding structure abuts against the inner wall surface of the receiving cavity.

[0015] As a further improvement of the present invention, a first limiting surface is provided on the inner wall surface of the accommodating cavity, and a second limiting surface is provided on the outer wall surface of the sealing member. The sealing member is accommodated in the accommodating cavity, and the second limiting surface abuts against the first limiting surface.

[0016] As a further improvement of the present invention, a snap-in channel and a guide portion are provided on the main body, the snap-in channel is communicated with the accommodating cavity, the guide portion is provided on the side of the accommodating cavity and protrudes toward the snap-in channel, the sampling device includes a snap-in structure, the snap-in structure is accommodated in the snap-in channel, and can move within the snap-in channel, the snap-in structure moves until it contacts the guide portion, so as to move in a direction away from the accommodating cavity under the guidance of the guide portion.

[0017] To achieve the above-mentioned objectives, the present invention provides a sampling system, comprising an endoscope provided with a suction interface, a sampling container, a suction pump and the aforementioned sampling device, wherein the suction interface is inserted into the sampling device, and the suction interface and the sampling device are sealed by a sealing member, and the sampling container and the suction pump are respectively connected to the sampling device.

[0018] The beneficial effects of the present invention are as follows: the sampling device of the present invention has a raised structure on the outer wall and / or inner wall of the seal, so that after the suction interface is inserted into the seal, the suction interface exerts an expansion force on the seal, thereby improving the abutment strength between the raised structure and the inner side wall of the accommodating chamber, thereby improving the sealing effect between the seal and the main body. Similarly, the reaction force exerted by the inner side wall of the accommodating chamber on the raised structure increases the abutment strength between the position corresponding to the seal and the raised structure and the suction interface, thereby improving the sealing effect between the seal and the suction interface, avoiding the sample from overflowing from the seal during sampling, and improving the safety of medical staff; at the same time, the airtightness between the suction interface and the main body is improved, avoiding air from entering the negative pressure environment inside the sampling device from the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic three-dimensional diagram of an endoscope in a preferred embodiment of the present invention.

[0020] FIG2 is a partial enlarged view of portion A in FIG1 .

[0021] FIG3 is a schematic perspective view of a sampling device in a preferred embodiment of the present invention.

[0022] FIG4 is an exploded view of the sampling device in FIG3 .

[0023] FIG5 is a cross-sectional view of the sampling device in FIG3.

[0024] FIG6 is a partial enlarged view of portion B in FIG5 .

[0025] FIG. 7 is a perspective schematic diagram of the sealing member in FIG. 4 .

[0026] FIG8 is a schematic diagram of the combination of a main body, a sealing member and a suction interface in the prior art.

[0027] FIG9 is a schematic diagram of the assembly of the main body, the sealing member and the suction interface in the present invention.

[0028] FIG10 is a perspective schematic diagram of the main body in FIG4 .

[0029] FIG11 is a cross-sectional view of the main body in FIG10 .

[0030] Explanation of the accompanying drawings: sampling device 200, main body 1, interface channel 11, sampling channel 12, accommodating chamber 13, first limiting surface 14, snap-fitting channel 15, guide portion 16, guide surface 161, sealing member 2, connecting chamber 21, first channel 211, second channel 212, third channel 213, second limiting surface 22, protruding structure 23, first end face 24, second end face 25, first area 26, second area 27, snap-fitting structure 3, snap-fitting plate 31, snap-fitting end 311; suction assembly 300, suction interface 4, insertion portion 41, groove 42, sealing portion 43, setting area 5, endoscope 100, sampling container 400. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Referring to Figures 1 and 3 in conjunction with Figure 4 , the present invention discloses a sampling system for sampling tissue or other substances in a patient's body. The sampling system includes an endoscope 100, a suction assembly 300, a sampling device 200, a sampling container 400, and a suction pump (not shown). The suction assembly 300 is assembled in the endoscope 100, and one end of the suction assembly 300 extends from the endoscope 100 to form a suction interface 4. The suction interface 4 is connected to the sampling device 200, and the substance in the suction assembly 300 is sampled through the sampling device 200. Specifically, a sealing member 2 is provided in the sampling device 200, and the suction interface 4 is inserted into the sampling device 200 and is sealed to the sampling device 200 through the sealing member 2. The sampling container 400 is detachably connected to the sampling device 200 and is used to accommodate the collected sample. The suction pump is connected to the sampling device 200 to form negative pressure in the sampling device 200 to provide suction to the tissue or other substances in the patient's body, thereby enabling the tissue or other substances in the patient's body to move toward the sampling device 200 through the suction component 300.

[0033] In this embodiment, an endoscope 100 is inserted into the patient's body for sampling. Of course, in other embodiments, other medical devices can be inserted into the patient's body for sampling, such as an optical endoscope 100, an electronic endoscope 100, or direct surgical sampling, which is not limited here.

[0034] In this embodiment, the specific structure of the endoscope 100, the specific structure of the suction assembly 300, the specific structure of the sampling container 400, the specific structure of the suction pump, and the connection relationship between the various components can all be designed according to the existing technology, and there is no limitation here. The improvement point of this application lies in the sealing structure between the sampling device 200 and the suction interface 4. The following description will provide a detailed explanation of this improvement point.

[0035] Please refer to Figures 2, 4, and 5 in combination with Figures 6 and 7. The sampling device 200 includes a main body 1 and a sealing member 2. The main body 1 is provided with a receiving cavity 13 for accommodating the sealing member 2. The sealing member 2 has a connecting cavity 21 for plugging the suction interface 4. In other words, the sealing member 2 is accommodated in the receiving cavity 13 of the main body 1, and the suction interface 4 can be extended into the connecting cavity 21. The sealing member 2 is squeezed by the suction interface 4 and the main body 1 to achieve a sealed connection between the main body 1 and the suction interface 4.

[0036] The outer and / or inner sidewalls of the seal 2 are provided with raised structures 23, which are arranged around the circumference of the seal 2. When the suction port 4 is plugged into the main body 1, a portion of the suction port 4 extends into the connecting cavity 21 and, together with the main body 1, compresses the seal 2, deforming the seal 2 to achieve a sealed connection between the suction port 4 and the main body 1. Specifically, the connecting cavity 21 is provided at the central axis of the seal 2 and passes through the seal 2. Preferably, the raised structures 23 are integrally formed with the seal 2.

[0037] The protruding structure 23 is a protruding ring, or includes a plurality of protruding units spaced apart along the circumference of the sealing member 2. Specifically, the protruding structure 23 protrudes outward from the outer side wall of the sealing member 2.

[0038] In this embodiment, the raised structure 23 is a raised ring, which is continuously fitted with the cavity wall of the accommodating cavity 13 to improve the sealing effect between the seal 2 and the main body 1. Of course, in other embodiments, the raised structure 23 can also be set as a plurality of raised units distributed along the circumferential direction of the seal 2, that is, the plurality of raised units are connected to form a ring. When the suction interface 4 is accommodated in the connecting cavity 21 and squeezes the seal 2 together with the main body 1, the raised unit is deformed to fill the gap between the two adjacent raised units, or the seal 2 is deformed to fill the gap between the two adjacent raised units, so that the seal 2 fits with the cavity wall of the accommodating cavity 13, which can also improve the sealing effect between the seal 2 and the main body 1. There is no restriction on the shape of the raised structure 23 here.

[0039] By providing a protruding structure 23 on the outer wall of the sealing member 2, when the suction interface 4 is accommodated in the connecting cavity 21, the sealing member 2 is squeezed together with the main body 1, and the suction interface 4 applies a thrust toward the main body 1 to the sealing member 2, so that the protruding structure 23 can fit tightly with the inner cavity wall of the accommodating cavity 13, thereby improving the sealing effect between the sealing member 2 and the main body 1. At the same time, the inner cavity wall of the accommodating cavity 13 has a reaction force on the protruding structure 23, thereby causing the protruding structure 23 to apply a reaction force extending toward the connecting cavity 21 to the sealing member 2, so as to improve the fit and abutment strength between the sealing member 2 and the suction interface 4, thereby improving the sealing effect between the suction interface 4 and the main body 1.

[0040] Of course, in other embodiments, the protrusion structure 23 can also be arranged in the connecting cavity 21 of the seal 2, that is, the protrusion structure 23 is arranged on the inner wall of the seal 2, and the protrusion structure 23 is directly abutted against the suction interface 4 to improve the sealing effect between the suction interface 4 and the main body 1. The sealing principle is the same as the sealing principle when the protrusion structure 23 is arranged on the outer wall of the seal 2, which will not be repeated here.

[0041] Specifically, there are at least two protruding structures 23, which are evenly distributed on the outer wall of the seal 2, so that at least two layers of sealing bands are formed between the seal 2 and the accommodating cavity 13, thereby improving the sealing effect between the seal 2 and the main body 1. Preferably, there are three protruding structures 23.

[0042] In this embodiment, the cross-section of the protruding structure 23 is set to be semicircular, so as to increase the contact area between the protruding structure 23 and the main body 1 when the protruding structure 23 abuts against the inner wall of the accommodating cavity 13 and deforms, thereby further improving the sealing effect between the protruding structure 23 and the main body 1. Of course, in other embodiments, the cross-section of the protruding structure 23 can also be set to other shapes such as triangle and square, and the position of the protruding structure 23 on the sealing member 2 can be evenly distributed or unevenly distributed, as long as the purpose of the protruding structure 23 abutting against the inner wall of the accommodating cavity 13 can be achieved, and there is no limitation here.

[0043] The seal 2 is made of an elastic material and is connected to the main body 1 by an interference fit. Specifically, the seal 2 can be made of rubber or an elastic polymer material, so that when the suction interface 4 and the main body 1 jointly squeeze the seal 2, the seal 2 can be deformed to seal the gap between the suction interface 4 and the main body 1. By connecting the seal 2 to the inner wall of the accommodating cavity 13 by an interference fit, the seal 2 will not fall out of the accommodating cavity 13 in a free state, thereby improving the stability of the sampling device 200. At the same time, when the suction interface 4 extends into the connecting cavity 21, the extrusion force between the suction interface 4 and the main body 1 can be increased, thereby improving the sealing effect of the seal 2.

[0044] 7 and 11 , a first limiting surface 14 is provided on the inner side wall of the accommodating cavity 13 , and a second limiting surface 22 is provided on the outer side wall of the sealing member 2 . The second limiting surface 22 abuts against the first limiting surface 14 to limit the rotation of the sealing member 2 in the accommodating cavity 13 .

[0045] Specifically, due to the provision of first limiting surface 14 within accommodating cavity 13, the cross-section of accommodating cavity 13 cannot form a complete circle. Similarly, the cross-section of sealing member 2 cannot form a complete circle. In addition, by providing first limiting surface 14 on accommodating cavity 13 and second limiting surface 22 on sealing member 2, foolproof assembly of sealing member 2 and main body 1 is achieved, preventing assembly errors during assembly of sealing member 2 and main body 1.

[0046] In this embodiment, a first limiting surface 14 is provided in the accommodating chamber 13, and a second limiting surface 22 is correspondingly provided on the outer wall of the seal 2. Of course, in other embodiments, two or other numbers of first limiting surfaces 14 can be provided in the accommodating chamber 13, and two or other numbers of second limiting surfaces 22 are correspondingly provided on the outer wall of the seal 2. As long as the purpose of limiting the rotation of the seal 2 in the accommodating chamber 13 can be achieved, no limitation is made here.

[0047] As shown in Figures 5 and 6 , the main body 1 is provided with a sampling channel 12 that communicates with the accommodating chamber 13. Specifically, the sampling channel 12 is also connected to the connecting chamber 21 of the sealing member 2 housed within the accommodating chamber 13. The suction port 4 is provided with a suction channel, and at least a portion of the suction port 4 extends into the connecting chamber 21, thereby connecting the suction channel and the connecting chamber 21. Specifically, the sampling channel 12 is provided in the middle of the accommodating chamber 13 and communicates with the connecting chamber 21, allowing sampled material to flow from the connecting chamber 21 to the sampling channel 12.

[0048] The connecting cavity 21 includes a first channel 211, a second channel 212, and a third channel 213 that are interconnected. The first channel 211 is connected to the sampling channel 12. Specifically, the first channel 211 is located on the side of the sealing member 2 close to the main body 1. The second channel 212 connects the first channel 211 and the third channel 213. At least a portion of the suction port 4 passes through the third channel 213 and is accommodated in the second channel 212. Specifically, the diameter of the first channel 211 is the same as that of the sampling channel 12, so that the sampled material can flow quickly from the first channel 211 to the sampling channel 12. Preferably, the first channel 211 is a cylindrical hole.

[0049] The second channel 212 extends in a contracting manner toward the first channel 211, and the minimum diameter of the second channel 212 is not less than the maximum diameter of the first channel 211. In other words, the second channel 212 is shaped like a truncated cone to match the suction port 4, so that the suction port 4 can fit tightly with the second channel 212, thereby improving the sealing effect between the suction port 4 and the seal 2.

[0050] The third channel 213 extends in a contracting manner toward the second channel 212, and the minimum diameter of the third channel 213 is no less than the maximum diameter of the second channel 212. Specifically, the third channel 213 is located on the side of the seal 2 away from the main body 1. By setting the minimum diameter of the third channel 213 to be no less than the maximum diameter of the second channel 212, the suction port 4 can be smoothly inserted into the seal 2. At the same time, the third channel 213 also serves as a guide for guiding the suction port 4.

[0051] In this embodiment, the connecting chamber 21 includes a first channel 211, a second channel 212 and a third channel 213 that are interconnected and arranged in sequence. The suction interface 4 is guided into the connecting chamber 21 through the third channel 213, and the suction interface 4 squeezes the inner side wall of the second channel 212 to achieve a sealed connection between the suction interface 4 and the sealing member 2. Of course, in other embodiments, only the first channel 211 and the second channel 212 may be provided in the connecting chamber 21. At this time, the suction interface 4 directly extends into the second channel 212 and squeezes the inner side wall of the second channel 212, which can also achieve the suction interface 4 extending into the connecting chamber 21 and being sealed with the sealing member 2. There is no limitation here.

[0052] Specifically, the seal 2 is designed in a frustum-conical shape and includes a first end surface 24 and a second end surface 25. The maximum diameter of the first end surface 24 is smaller than the maximum diameter of the second end surface 25. Correspondingly, the accommodating cavity 13 is also designed in a frustum-conical shape to accommodate the seal 2. Specifically, the first end surface 24 is positioned proximate to the sampling channel 12, while the second end surface 25 is positioned at the end of the seal 2 distal from the first end surface 24. This arrangement facilitates assembly of the seal 2 and the main body 1, improving assembly efficiency.

[0053] Of course, in other embodiments, the seal 2 can be designed into other shapes according to actual conditions, such as cylindrical or irregular shapes, and the shape of the accommodating cavity 13 is set to correspond to the seal 2. As long as the seal 2 can be accommodated in the accommodating cavity 13 and abut against the inner wall surface of the accommodating cavity 13, there is no limitation here.

[0054] 8 and 9 , the sealing member 2 includes a raised structure 23 disposed on its outer wall surface and located in a setting area 5. The setting area 5 is the area between the end of the sealing member 2 away from the third channel 213 and the front end of the suction port 4 when the suction port 4 is accommodated in the connecting cavity 21. Specifically, the front end of the suction port 4 is the end of the suction port 4 away from the endoscope 100. When the suction port 4 extends into the connecting cavity 21, the front end of the suction port 4 extends into the second channel 212. The setting area 5 is the area between the end of the suction port 4 away from the endoscope 100 and the first end surface 24 of the sealing member 2.

[0055] Please refer to Figure 8. In the prior art, when the suction interface 4 is inserted into the connecting cavity 21, as shown by the dotted line in the figure, the hole wall of the seal 2 is compressed and deformed. After the deformation, the outline of the internal connecting cavity 21 can be roughly shown by the dotted line. As can be seen from the figure, the deformation of the seal 2 will cause the channel edge of its first channel 211 to be misaligned with the channel edge of the sampling channel 12. In this way, a step will be formed between the channel edge of the first channel 211 and the channel edge of the sampling channel 12. The step will hinder the sample transportation speed between the first channel 211 and the sampling channel 12, thereby affecting the sampling efficiency. In order to facilitate the distinction between the seal 2 and the main body 1, a gap is left between the seal 2 and the main body 1, but in actual use, the seal 2 fits tightly against the main body 1.

[0056] As shown in FIG9 , at least two raised structures 23 are provided on the outer sidewall of the sealing member 2, one of which is located within the setting area 5. By providing the raised structures 23 on the outer sidewall of the sealing member 2 corresponding to the setting area 5, when the suction port 4 extends into the connecting cavity 21 and deforms the sealing member 2, the sealing member 2 within the setting area 5 can slightly deflect about the raised structures 23 provided in this area, causing the channel edge of the first channel 211 to move toward the channel edge of the sampling channel 12, thereby eliminating the aforementioned step or reducing the size of the aforementioned step, improving the smoothness of the first channel 211 and the sampling channel 12, and further increasing the flow rate of the sampled article within the first channel 211 and the sampling channel 12.

[0057] Specifically, the seal 2 disposed on either side of the raised structure 23 within the installation area 5 is defined as a first area 26 and a second area 27. The second area 27 is disposed proximate to the sampling channel 12, while the first area 26 is disposed away from the sampling channel 12. When the suction port 4 extends into the connecting cavity 21, the suction port 4 presses against the first area 26, causing the first area 26 to move toward the inner wall of the accommodating cavity 13 and to fit tightly therewith. As the first area 26 moves toward the inner wall of the accommodating cavity 13, the second area 27 can rotate about the raised structure 23 as a rotation axis, causing the second area 27 to move away from the inner wall of the accommodating cavity 13. This further causes the channel edge of the first channel 211 to move toward the channel edge of the sampling channel 12, aligning the two channel edges or reducing the size of the aforementioned step, thereby increasing the flow rate of the sampled article within the first channel 211 and the sampling channel 12.

[0058] Please refer to Figures 2, 4, 6, 10 and 11. The main body 1 is also provided with a snap-on channel 15 and an interface channel 11. The sampling channel 12 is connected to the interface channel 11 through the snap-on channel 15. The sampling device 200 also includes a snap-on structure 3, which is accommodated in the snap-on channel 15 and can move in the snap-on channel 15. The suction interface 4 includes an insertion portion 41, a sealing portion 43 and a groove 42 provided between the insertion portion 41 and the sealing portion 43. The insertion portion 41 extends into the connecting cavity 21 and is sealed with the sealing member 2. The snap-fit ​​structure 3 includes a snap-fit ​​plate 31 and a snap-fit ​​end 311 provided on the snap-fit ​​plate 31. The snap-fit ​​plate 31 can move in the snap-fit ​​channel 15 and extend into the groove 42, and make the snap-fit ​​end 311 abut against the bottom of the groove 42. The snap-fit ​​end 311 and the groove 42 cooperate to limit the suction interface 4 from detaching from the connecting cavity 21. The sealing portion 43 is accommodated in the interface channel 11 to seal the interface channel 11, thereby improving the connection stability between the sampling device 200 and the suction interface 4.

[0059] The main body 1 is further provided with a guide portion 16. The engaging channel 15 communicates with the accommodating chamber 13. The guide portion 16 is provided beside the accommodating chamber 13 and extends into the engaging channel 15. When the engaging structure 3 moves within the engaging channel 15 and contacts the guide portion 16, the guide portion 16 guides the engaging structure 3 away from the accommodating chamber 13. This arrangement solves the problem of the engaging structure 3 contacting the sealing member 2 when moving within the engaging channel 15, thereby deforming the sealing member 2 or even causing the sealing member 2 to slip out of the accommodating chamber 13.

[0060] In the direction in which the clamping structure 3 is inserted into the clamping channel 15, the guide portion 16 is wedge-shaped, that is, the guide portion 16 is provided with a guide surface arranged at an angle to the direction, and the guide surface guides the movement direction of the clamping structure 3. Specifically, there are four guide portions 16, which are arranged in pairs on both sides of the sampling channel 12 and the interface channel 11. That is, the sampling channel 12 is provided with a guide portion 16 on both sides close to the clamping channel 15, and the interface channel is also provided with a guide portion 16 on both sides close to the clamping channel 15. With this arrangement, when the clamping structure 3 moves within the clamping channel 15, the clamping structure 3 can correct its movement direction under the guidance of the four guide portions 16, so that the clamping structure 3 can move perpendicular to the central axis of the sampling channel 12. At the same time, it can prevent the clamping structure 3 from contacting the sealing member 2 during movement, thereby improving the movement independence of the clamping structure 3.

[0061] In this embodiment, four guide portions 16 are provided, which are respectively provided on both sides of the interface channel 11 and the sampling channel 12 to guide the moving direction of the snap-fit ​​structure 3. Of course, in other embodiments, the guide portion 16 can be provided only on the side of the sampling channel 12, and the moving direction of the snap-fit ​​structure 3 is guided by the guide portion 16 to avoid contact between the snap-fit ​​structure 3 and the sealing member 2. There is no limitation here.

[0062] In summary, the sampling device 200 of the present invention provides a protruding structure 23 on the outer wall of the sealing member 2 that can abut against the inner wall of the accommodating chamber 13. When the suction interface 4 is inserted into the sealing member 2, the suction interface 4 and the inner wall of the accommodating chamber 13 squeeze the sealing member 2, thereby increasing the strength of the force exerted by the sealing member 2 on the protruding structure 23, improving the abutting strength of the protruding structure 23 and the inner wall of the accommodating chamber 13, and thus improving the sealing effect of the sealing member 2 and the main body 1. Similarly, the inner wall of the accommodating chamber 13 abuts against the protruding structure 23. The reaction force exerted by the structure 23 increases the abutment strength between the protruding structure 23 and the suction interface 4, thereby improving the sealing effect between the sealing member 2 and the suction interface 4; by arranging the protruding structure 23 in the setting area 5, part of the sealing member 2 can rotate around the protruding structure 23, thereby increasing the flow rate of the sampled material in the first channel 211 and the sampling channel 12; by arranging the guide portion 16 in the clamping channel 15, the clamping structure 3 cannot contact the sealing member 2, thereby preventing the sealing member 2 from slipping out of the accommodating cavity 13.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A sealing member, housed in a sampling device (200), for sealingly connecting a main body (1) of the sampling device (200) and a suction interface (4) of an endoscope (100), characterized in that: The sealing member (2) has a connection cavity (21) for the suction interface (4) to be plugged in, and a protrusion structure (23) is provided on the outer wall and / or the inner wall of the sealing member (2), and the protrusion structure (23) is arranged around the circumference of the sealing member (2). When the suction interface (4) is plugged in with the main body (1), part of the suction interface (4) extends into the connection cavity (21) and squeezes the sealing member (2) together with the main body (1), and the sealing member (2) is deformed to achieve a sealed connection between the suction interface (4) and the main body (1).

2. The seal according to claim 1, characterized in that: The sealing member (2) is configured in a truncated cone shape; And / or, at least two protruding structures (23) are provided, and at least two protruding structures (23) are evenly distributed on the outer wall surface of the sealing element (2); And / or, the sealing member (2) is made of an elastic material, and the sealing member (2) and the main body (1) are interference fit.

3. The seal according to claim 1, characterized in that: The protruding structure (23) is a protruding ring, or the protruding structure (23) comprises a plurality of protruding units distributed at intervals along the circumference of the sealing element (2).

4. The seal according to claim 1, characterized in that: The connecting cavity (21) comprises a first channel (211) and a second channel (212) which are interconnected, the first channel (211) being a cylindrical hole, the second channel (212) extending in a contracting manner towards the first channel (211), and the minimum diameter of the second channel (212) is not less than the maximum diameter of the first channel (211).

5. The seal according to claim 4, characterized in that: The connecting cavity (21) further comprises a third channel (213) communicating with the second channel (212); the third channel (213) extends in a contracting manner toward the second channel (212); and the minimum diameter of the third channel (213) is not less than the maximum diameter of the second channel (212).

6. The seal according to claim 4 or 5, characterized in that: The sealing member (2) comprises the protruding structure (23) arranged on its outer wall surface and located in the setting area (5); the setting area (5) is the area between one end of the sealing member (2) close to the first channel (211) and the front end of the suction interface (4) when the suction interface (4) is accommodated in the connecting cavity (21).

7. A sampling device, characterized in that: It comprises a main body (1) and a seal (2) as described in any one of claims 1 to 6 and housed in the main body (1), wherein a housing cavity (13) is provided in the main body (1), the seal (2) is housed in the housing cavity (13), and a protruding structure (23) abuts against an inner wall surface of the housing cavity (13).

8. The sampling device according to claim 7, characterized in that: A first limiting surface (14) is provided on the inner wall surface of the accommodating cavity (13), and a second limiting surface (22) is provided on the outer wall surface of the sealing member (2); the sealing member (2) is accommodated in the accommodating cavity (13), and the second limiting surface (22) is in contact with the first limiting surface (14).

9. The sampling device according to claim 7, characterized in that: The main body (1) is provided with a snap-fitting channel (15) and a guiding portion (16), the snap-fitting channel (15) being in communication with the accommodating cavity (13), the guiding portion (16) being arranged on the side of the accommodating cavity (13) and protruding toward the snap-fitting channel (15), the sampling device (200) comprising a snap-fitting structure (3), the snap-fitting structure (3) being received in the snap-fitting channel (15) and being movable in the snap-fitting channel (15), the snap-fitting structure (3) moving until it contacts the guiding portion (16) so as to move in a direction away from the accommodating cavity (13) under the guidance of the guiding portion (16).

10. A sampling system, characterized in that: It comprises an endoscope (100) provided with a suction interface (4), a sampling container (400), a suction pump and a sampling device (200) as described in any one of claims 7 to 9, wherein the suction interface (4) is inserted into the sampling device (200), and the suction interface (4) and the sampling device (200) are sealed by a sealing member (2), and the sampling container (400) and the suction pump are respectively connected to the sampling device (200).

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