Traction assembly and endoscope

Abstract

The invention relates to the technical field of medical instruments, and provides a traction assembly and an endoscope. The traction assembly comprises a traction pipe, a traction wire, a sealing assembly and a limiting piece, a containing cavity is formed in the sealing assembly, a first wire passing hole and a second wire passing hole are formed in the two ends of the containing cavity respectively, and the limiting piece is arranged in the containing cavity and provided with a through hole in a penetrating mode. The traction pipe is inserted into the first wire passing hole and abuts against the limiting piece, so that the limiting piece covers the gap between one end of the traction pipe and the traction wire, the sealing reliability can be improved, the assembling position of the sealing assembly can be positioned, and it is guaranteed that the sealing assembly is installed accurately. The traction pipe is in interference fit with the first wire passing hole, and the traction wire is in interference fit with the second wire passing hole, so that the sealing assembly can be tightly attached to the traction pipe and the traction wire, sealing is achieved, the problem of leakage in a gap between the traction pipe and the traction wire is reliably prevented, and the waterproof performance of the traction assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a traction assembly and an endoscope. BACKGROUND

[0002] An endoscope is a medical device used for disease diagnosis and treatment, which can enter the human body through natural orifice or incision formed by surgery, and can be used to observe the lesion of the relevant part by sending the endoscope into the target position to be observed, and can also be used to operate with relevant surgical instruments. The endoscope usually has a traction structure, which can be used to adjust the orientation of the lens, or control the insertion of relevant structures through the curved channel when the endoscope is inserted into the human body.

[0003] In the related art, when using the endoscope, physiological saline and the like are usually poured into the human body through the pipeline, and then the poured liquid is discharged out of the body through negative pressure suction and the like, so as to achieve the purpose of cleaning the lens or the relevant part of the human body. However, the traction structure of the related endoscope generally has poor waterproof performance, which causes the physiological saline discharged out of the body to easily leak in the connection gap, causing inconvenience in use. SUMMARY

[0004] Therefore, the present application provides a traction assembly and an endoscope to solve the problem of poor waterproof performance of the traction structure of the endoscope.

[0005] To solve the above problems, the technical scheme of the present application is as follows:

[0006] A traction assembly, comprising: a traction tube; a traction line arranged in the traction tube, the traction line having an operation end and a connection end, the operation end being used for connecting with an operation assembly, and the connection end being used for connecting with a front end of the endoscope; a sealing assembly, having an accommodation cavity formed therein, and a first wire passing hole and a second wire passing hole being formed on the sealing assembly; the first wire passing hole and the second wire passing hole are respectively located at opposite ends of the accommodation cavity and are in communication with the outside and the accommodation cavity; a limiting piece is arranged in the accommodation cavity and connected with the sealing assembly, a through hole in communication with the first wire passing hole and the second wire passing hole is formed through the limiting piece, the through hole is coaxially arranged with the first wire passing hole at least, the diameter of the through hole is smaller than the outer diameter of the traction tube and larger than the outer diameter of the traction line; one end of the traction tube close to the operation end is inserted into the first wire passing hole and abuts against the limiting piece, the operation end passes through the through hole and the second wire passing hole in sequence and is exposed outside the sealing assembly; the traction tube is in interference fit with the first wire passing hole, and the part of the traction line in the second wire passing hole is in interference fit with the second wire passing hole.

[0007] In some embodiments, the sealing assembly includes: a first seal, with the first wire passage formed on the first seal; and a second seal connected to the first seal, with the second wire passage formed on the second seal; wherein the receiving cavity is formed within the first seal, and the limiting member is connected to the first seal.

[0008] In some embodiments, the first sealing member is provided with a first connecting structure, and the second sealing member is provided with a second connecting structure corresponding to the first connecting structure; wherein the second connecting structure is detachably connected to the first connecting structure.

[0009] In some embodiments, the first sealing member includes a first sleeve and a first elastic body disposed within the first sleeve, the first elastic body being press-fitted with the inner cavity of the first sleeve; the first wire passage is formed on the first elastic body and communicates with the inner cavity of the first sleeve; wherein, the second sealing member is connected to the first sleeve, and the second wire passage is connected to the inner cavity of the first sleeve; a portion of the inner cavity of the first sleeve forms the receiving cavity, and the limiting member is connected to the first sleeve; the first connecting structure is disposed on the first sleeve.

[0010] In some embodiments, the second sealing element includes a second sleeve and a second elastic body disposed within the second sleeve, the second elastic body being press-fitted with the inner cavity of the second sleeve; a second wire passage is formed on the second elastic body and communicates with the inner cavity of the second sleeve; wherein, the second sleeve is connected to the first sleeve, and the inner cavity of the second sleeve is communicated with the inner cavity of the first sleeve; and a second connecting structure is disposed on the second sleeve.

[0011] In some embodiments, the end of the first sleeve near the connection end is filled with a sealing compound, which is used to seal the gap between the inner cavity of the first sleeve and the traction tube.

[0012] This invention also provides an endoscope, comprising: the aforementioned traction assembly; an operating assembly connected to the operating end, the operating assembly being used to control the movement of the traction cable; a mounting base having an internal mounting cavity, the mounting base having a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole respectively communicating with the mounting cavity; an insertion tube inserted into the first mounting hole, the end of the traction tube near the connecting end passing sequentially through the second mounting hole and the mounting cavity, and passing through the insertion tube; and a tip end connected to the end of the insertion tube away from the operating assembly, and at least connected to the connecting end.

[0013] In some embodiments, the endoscope further includes an irrigation tube, and the mounting base is provided with a third mounting hole communicating with the mounting cavity, the irrigation tube being inserted into the third mounting hole; wherein, there is at least a first gap for the input of irrigation fluid between the inner wall of the insertion tube and the traction tube, the irrigation tube communicating with the first gap via the mounting cavity; at least one irrigation port is provided on the circumferential sidewall and / or the tip of the insertion tube, the irrigation port communicating with the outside and the first gap.

[0014] In some embodiments, the endoscope further includes an instrument tube, and the mounting base is provided with a fourth mounting hole communicating with the mounting cavity. The instrument tube passes through the fourth mounting hole and the mounting cavity in sequence and is inserted into the insertion tube. One end of the instrument tube extends to the tip end and is connected to the tip end. The tip end is provided with an instrument port communicating with the outside, which is used for surgical instruments inserted into the instrument tube to extend out. There is a second gap between the inner wall of the instrument tube and the surgical instrument for at least one purpose: to allow irrigation fluid to be output.

[0015] In some embodiments, the mounting base includes: a base body, on which the mounting cavity and the first mounting hole are both formed, and an opening is formed at the end of the mounting cavity opposite to the first mounting hole; and a cover, connected to the base body and covering the opening, wherein the second mounting hole, the third mounting hole and the fourth mounting hole are all formed through the cover.

[0016] This invention provides a traction assembly and endoscope. The traction assembly includes a traction tube, a traction wire, a sealing assembly, and a limiting member. The sealing assembly forms a receiving cavity, with a first wire passage hole and a second wire passage hole at each end of the cavity. The limiting member is disposed within the receiving cavity and has a through hole connecting the first and second wire passage holes. By inserting the traction tube into the first wire passage hole and abutting against the limiting member, while the operating end of the traction wire passes through the through hole and the second wire passage hole in sequence, the limiting member fits against the end of the traction tube from which the operating end protrudes, thus covering the gap between the traction tube and the traction wire at that end. This restricts relative loosening between the traction tube and the sealing assembly. Furthermore, the limiting member prevents the end face of the traction tube from directly pressing against the sealing assembly, thus preventing structural damage and improving the stability of the sealing assembly structure, thereby maintaining a reliable seal. In addition, the limiting member can also position the assembly between the sealing assembly and the traction tube, ensuring accurate installation of the sealing assembly. By using an interference fit between the traction tube and the first wire passage hole, and an interference fit between the portion of the traction wire located inside the second wire passage hole and the second wire passage hole, the sealing assembly can be tightly fitted with the traction tube and the traction wire, thereby achieving a seal between the traction tube and the traction wire. This reliably prevents leakage from occurring in the gap between the traction tube and the traction wire, and improves the waterproof performance of the traction assembly. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the traction assembly along the axial direction of the traction pipe provided in an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 The traction assembly shown is a cross-sectional view omitting the traction line and traction tube.

[0019] Figure 3 This is a cross-sectional view along the insertion tube axis of a portion of the endoscope structure provided in an embodiment of the present invention;

[0020] Figure 4 This is a three-dimensional schematic diagram of another part of the structure of the endoscope provided in the embodiment of the present invention;

[0021] Figure 5 This is an exploded view of the insertion tube and instrument tube provided in an embodiment of the present invention;

[0022] Figure 6 This is a radial cross-sectional view of the insertion tube provided in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Traction assembly; 11. Traction tube; 12. Traction line; 121. Operating end; 122. Connecting end; 13. Sealing assembly; 131. Receiving cavity; 132. First wire passage hole; 133. Second wire passage hole; 134. First seal; 1341. First connecting structure; 1342. First sleeve; 1343. First elastic body; 135. Second seal; 1351. Second connecting structure; 1352. Second sleeve; 1353. Second elastic body; 14. Limiting element; 141. Through hole ; 15. Sealing colloid; 2. Endoscope; 21. Mounting base; 211. Mounting cavity; 212. First mounting hole; 213. Second mounting hole; 214. Third mounting hole; 215. Fourth mounting hole; 216. Fifth mounting hole; 217. Base; 218. Cap; 22. Insertion tube; 221. First gap; 23. Tip; 231. Infusion port; 232. Instrument port; 24. Infusion tube; 241. Luer connector; 25. Instrument tube; 251. Second gap; 26. Connecting cable. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0027] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the directions under normal use, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use.

[0028] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0029] In the structure of an endoscope, the traction mechanism typically includes a traction tube and a traction cable. The traction tube is used to pass the traction cable through, thus protecting and guiding it. The traction cable, passing through the traction tube, extends towards the tip of the endoscope. During use, the operator can control the movement of relevant structures of the endoscope by pulling the external end of the traction cable, thereby enabling operations such as adjusting the field of view or controlling relevant structures through curved channels when the endoscope is inserted into the body.

[0030] Because the traction line is a movable component, it is usually not fixedly connected to the traction tube, and there is a gap between the inner wall of the traction tube and the traction line. This design generally results in poor waterproofing of the traction structure. During use, endoscopes typically require the infusion of saline solution or other fluids into the body through a tubing. The fluid is then drained through negative pressure suction. This process allows for cleaning of the endoscope to maintain a clear field of view, or for cleaning relevant body parts to remove diseased products, aiding in disease recovery. For example, in ureteral stone surgery, after lithotripsy, saline solution is infused through the endoscope's tubing for cleaning, allowing the stone fragments to be removed along with the saline solution. During the drainage process, due to the gap between the inner wall of the traction tube and the traction line, and because the position of the tip needs to be adjusted by pulling the traction line, it is impossible to completely seal the gap between the traction tube and the traction line. This allows some saline solution to enter the traction tube through the gap and flow from the end of the traction tube near the tip to the end outside the body. Ultimately, it leaks into the gap between the end of the traction tube outside the body and the traction line, causing contamination of the traction structure and resulting in inconvenience in use.

[0031] To address the issue of poor waterproofing performance of traction structures, such as Figure 1 and Figure 2As shown, this embodiment of the invention provides a traction assembly 1, including a traction tube 11, a traction wire 12, a sealing assembly 13, and a limiting member 14. The traction wire 12 passes through the traction tube 11 and has an operating end 121 and a connecting end 122. The operating end 121 is used to connect to the operating assembly, and the connecting end 122 is used to connect to the tip of an endoscope. The sealing assembly 13 has a receiving cavity 131 inside, and the sealing assembly 13 has a first wire passage hole 132 and a second wire passage hole 133. The first wire passage hole 132 and the second wire passage hole 133 are located at opposite ends of the receiving cavity 131 and communicate with the outside and the receiving cavity 131. A limiting member 14 is disposed within the receiving cavity 131 and connected to the sealing assembly 13. A through hole 141 is provided on the limiting member 14, communicating with the first wire passage hole 132 and the second wire passage hole 133. The through hole 141 is at least coaxially arranged with the first wire passage hole 132. The diameter of the through hole 141 is smaller than the outer diameter of the traction tube 11 and larger than the outer diameter of the traction wire 12. One end of the traction tube 11 near the operating end 121 is inserted into the first wire passage hole 132 and abuts against the limiting member 14. The operating end 121 passes through the through hole 141 and the second wire passage hole 133 in sequence and is exposed outside the sealing assembly 13. Furthermore, the traction tube 11 is press-fitted with the first wire passage hole 132, and the portion of the traction wire 12 located within the second wire passage hole 133 is press-fitted with the second wire passage hole 133.

[0032] Specifically, the operating component connected to the operating end 121 is used by the user to control the movement of the traction cable 12. The operating component can be directly connected to the traction cable 12 and is part of the endoscope's structure; alternatively, it can be an external component, to which the traction cable 12 is connected during surgery. Thus, the operating component can be connected and used with different external components. The tip end connected to the connecting end 122 is typically part of the endoscope's structure. This tip end is used to mount the endoscope's camera structure and surgical instruments, and to guide these components into the body. By connecting the operating component and the tip end, the traction cable 12 can move the camera structure and other components under the user's control.

[0033] The receiving cavity 131 formed inside the sealing assembly 13 is used for the insertion of the limiting member 14. It is understood that there are various specific arrangements for the limiting member 14 to be inserted into the receiving cavity 131, as long as the limiting member 14 is placed inside the receiving cavity 131. For example, in one embodiment, the receiving cavity 131 can be configured as a structure with an opening, so that the limiting member 14 is inserted into the receiving cavity 131 through the opening, and then the opening is sealed by a cover plate or other structure; in another embodiment, the sealing assembly 13 can be divided into two parts, so that the limiting member 14 is installed between the two parts of the sealing assembly 13 (i.e., the two parts together form the receiving cavity 131), or installed in the receiving cavity 131 formed by one of the parts, and then the two parts are spliced ​​together as a whole, which has a high degree of design flexibility.

[0034] The sealing assembly 13 has a first wire-passing hole 132 and a second wire-passing hole 133 respectively opened at opposite ends of the receiving cavity 131, and the limiting member 14 has a through hole 141. When the limiting member 14 is installed into the receiving cavity 131, the through hole 141 needs to connect the first wire-passing hole 132 and the second wire-passing hole 133 to meet the assembly of the traction tube 11 and the traction wire 12. The through hole 141 is at least coaxial with the first wire-passing hole 132, while the through hole 141 and the second wire-passing hole 133 can be coaxial. The path of the through hole 141 needs to be designed according to the relative positions of the first wire-passing hole 132 and the second wire-passing hole 133, so that one end of the through hole 141 connects to the first wire-passing hole 132 and the other end connects to the second wire-passing hole 133. Of course, it is also possible to make the through hole 141, the first wire-passing hole 132, and the second wire-passing hole 133 all coaxial, such as... Figure 1 As shown, this facilitates the smooth installation of the traction pipe 11 and the traction line 12, and reduces the bending amplitude of the traction line 12.

[0035] It is understandable that the limiting member 14 can usually be made of medical metal materials with good stability, such as copper or titanium, to meet the material requirements of medical scenarios and to give the limiting member 14 a certain rigidity so as to form a stable contact with the traction tube 11. At the same time, the inner wall of the through hole 141 formed by the limiting member 14 is relatively smooth, reducing the friction between the inner wall and the traction line 12, and facilitating the pulling movement of the traction line 12.

[0036] During assembly, the traction tube 11 is inserted into the first wire passage hole 132. One end of the traction tube 11 within the first wire passage hole 132 abuts against the limiting member 14. The position of the limiting member 14 within the sealing assembly 13 is determined, thus achieving the installation and positioning of the traction tube 11. The traction wire 12 passes through the traction tube 11, allowing the operating end 121 to exit from the end of the traction tube 11 that abuts against the limiting member 14. It then passes through the through hole 141 and the second wire passage hole 133 before being exposed in the sealing assembly 13, facilitating connection to the endoscope's operating components. By setting the limiting member 14, one end of the traction tube 11 abuts against the limiting member 14. This design ensures that the limiting member 14 fits snugly against the end of the traction tube 11 through which the operating end 121 passes, thereby partially concealing the gap between the traction tube 11 at that end and the traction wire 12. Furthermore, when the traction line 12 moves, the traction tube 11 may become loose due to the friction of the traction line 12. At this time, the abutment action of the limiting member 14 against the traction tube 11 can limit the loosening of the traction tube 11, effectively avoiding the problem of the sealing effect being affected by the relative movement between the traction tube 11 and the sealing assembly 13. The through hole 141 opened on the limiting member 14 can also meet the normal pulling movement of the traction line 12. In addition, considering that part of the structure of the sealing assembly 13 is a flexible structure, the limiting member 14 can separate the end face of the traction tube 11 from the sealing assembly 13, preventing the end face of the traction tube 11 from directly squeezing the flexible structure of the sealing assembly 13 and causing structural damage to the sealing assembly 13. The protection of the limiting member 14 helps to maintain the reliability of the seal. Furthermore, this design allows the sealing component 13 to be accurately installed at the end of the traction pipe 11 through which the operating end 121 passes, thereby achieving a sealing and waterproof effect at that location. During assembly, the operator can determine that the traction pipe 11 and the sealing component 13 are properly assembled by the contact between the limiting member 14 inside the sealing component 13 and the traction pipe 11, which facilitates accurate positioning and helps improve assembly production efficiency.

[0037] It should be noted that, in order to achieve a sealing effect, an interference fit is required between the traction tube 11 and the first wire passage hole 132, and an interference fit is also required between the portion of the traction wire 12 located within the second wire passage hole 133 and the second wire passage hole 133. Specifically, in the sealing assembly 13, the components with the first wire passage hole 132 and the components with the second wire passage hole 133 can adopt elastic structures, such as rubber plugs. After the traction tube 11 and the traction wire 12 are assembled, the elastic deformation of the elastic structure compresses the diameters of the first wire passage hole 132 and the second wire passage hole 133, thereby squeezing the traction tube 11 and the traction wire 12 to form an interference fit, ensuring that both the traction tube 11 and the traction wire 12 are tightly fitted with the sealing assembly 13, achieving a reliable seal. Of course, the traction tube 11 and the traction wire 12 can also adopt an elastic structure, so that the traction tube 11 and the traction wire 12 are assembled with the sealing component 13 in a compressed state. After the assembly is completed, the traction tube 11 has a tendency to deform and recover in the first wire hole 132, so that it can continuously squeeze the inner wall of the first wire hole 132 to form an interference fit. Similarly, the part of the traction wire 12 in the second wire hole 133 also forms an interference fit with the second wire hole 133.

[0038] In the above design scheme, by setting the component with the first wire hole 132 and the component with the second wire hole 133 as elastic structures, or by setting the traction tube 11 and the traction line 12 as elastic structures, a reliable seal can be achieved while satisfying the relative movement between the traction tube 11 and the traction line 12, without affecting the traction control function of the traction assembly 1.

[0039] The traction assembly 1 provided in this embodiment of the invention includes a traction tube 11, a traction wire 12, a sealing assembly 13, and a limiting member 14. By inserting the traction tube 11 into the first wire passage hole 132, with one end of the traction tube 11 in the first wire passage hole 132 abutting against the limiting member 14, the limiting member 14, to a certain extent, covers the gap between the end of the traction tube 11 in the first wire passage hole 132 and the traction wire 12, limiting the loosening between the traction tube 11 and the sealing assembly 13, and preventing the end face of the traction tube 11 from directly pressing the structure of the sealing assembly 13 and causing structural damage. This helps maintain the reliability of the seal, and also allows for positioning of the assembly position between the sealing assembly 13 and the traction tube 11, ensuring that the sealing assembly 13 is accurately installed at the end of the traction tube 11 through which the operating end 121 passes. Furthermore, the assembly and positioning operation is convenient and can improve assembly efficiency. In addition, by using an interference fit between the traction tube 11 and the first wire passage hole 132, and an interference fit between the portion of the traction wire 12 located in the second wire passage hole 133 and the second wire passage hole 133, the sealing assembly 13 can be tightly fitted with the traction tube 11 and the traction wire 12, thereby achieving a seal between the traction tube 11 and the traction wire 12, reliably preventing leakage in the gap between the traction tube 11 and the traction wire 12, and improving the waterproof performance of the traction assembly 1.

[0040] In some embodiments, such as Figure 1 and Figure 2 As shown, the sealing assembly 13 includes a first sealing element 134 and a second sealing element 135. A first wire passage hole 132 is formed on the first sealing element 134, the second sealing element 135 is connected to the first sealing element 134, and a second wire passage hole 133 is formed on the second sealing element 135. A receiving cavity 131 is formed within the first sealing element 134, and a limiting member 14 is connected to the first sealing element 134.

[0041] It should be noted that, to ensure a reliable seal, the connection between the first sealing element 134 and the second sealing element 135 is typically a sealed connection, meaning that the first sealing element 134 and the second sealing element 135 are tightly fitted together to prevent leakage from occurring in the connection gap between the first sealing element 134 and the second sealing element 135. Optionally, the first sealing element 134 and the second sealing element 135 can be bonded together with sealant, or a sealing ring can be provided between the first sealing element 134 and the second sealing element 135. It is understood that there is no unique solution for achieving a sealed connection, and this embodiment of the invention does not impose further limitations on it.

[0042] In the above embodiment, the sealing assembly 13 is divided into two parts: a first sealing element 134 and a second sealing element 135. The receiving cavity 131 is formed inside the first sealing element 134. This design takes into account that the traction tube 11 and the traction line 12 are usually slender and flexible structures. The first sealing element 134 can be assembled with components such as the limiting element 14 first, and then the second sealing element 135 and the first sealing element 134 can be connected as a whole, which increases the assembly flexibility. In the specific assembly operation, the limiting element 14 and the first sealing element 134 can be assembled first, the traction tube 11 can be inserted into the first wire hole 132, the second sealing element 135 can be inserted from the operating end 121 of the traction line 12, and finally the first sealing element 134 and the second sealing element 135 can be connected to complete the overall assembly of the traction assembly 1. The assembly operation is simple and easy to implement.

[0043] In some embodiments, such as Figure 1 As shown, the first sealing member 134 is provided with a first connecting structure 1341, and the second sealing member 135 is provided with a second connecting structure 1351 corresponding to the first connecting structure 1341. The second connecting structure 1351 is detachably connected to the first connecting structure 1341.

[0044] Alternatively, in one implementation, such as Figure 1 As shown, one of the first connecting structure 1341 and the second connecting structure 1351 can be a snap-fit, and the other is a corresponding snap-fit ​​groove, so that the first connecting structure 1341 and the second connecting structure 1351 can be snapped together. In another embodiment, both the first connecting structure 1341 and the second connecting structure 1351 are provided as threaded holes, or one of the first connecting structure 1341 and the second connecting structure 1351 is a threaded hole, and the other is a through hole 141, so that a detachable connection can be achieved by using threaded fasteners such as bolts.

[0045] It should be noted that when the first connecting structure 1341 and the second connecting structure 1351 are connected to each other, the connection gap between the first sealing member 134 and the second sealing member 135 needs to be sealed. Usually, a sealing ring or other structure can be set between the first sealing member 134 and the second sealing member 135 to achieve the sealing, thereby ensuring that the first sealing member 134 and the second sealing member 135 can be detachably connected while meeting the sealing requirements.

[0046] The above embodiments, by setting the first connecting structure 1341 and the second connecting structure 1351, can achieve a detachable connection between the first sealing element 134 and the second sealing element 135, with high flexibility in disassembly and assembly.

[0047] In some embodiments, such as Figure 1 and Figure 2As shown, the first sealing element 134 includes a first sleeve 1342 and a first elastic body 1343 disposed within the first sleeve 1342. The first elastic body 1343 is press-fitted with the inner cavity of the first sleeve 1342, and a first wire passage hole 132 is formed on the first elastic body 1343 and communicates with the inner cavity of the first sleeve 1342. The second sealing element 135 is connected to the first sleeve 1342, and the second wire passage hole 133 communicates with the inner cavity of the first sleeve 1342. A portion of the inner cavity of the first sleeve 1342 forms a receiving cavity 131, and a limiting member 14 is connected to the first sleeve 1342. A first connecting structure 1341 is disposed on the first sleeve 1342.

[0048] Specifically, the size of the first elastic body 1343 can be set to be slightly larger than the size of the inner cavity of the first sleeve 1342, so that the first elastic body 1343 is inserted into the first sleeve 1342 in a compressed state, thereby making the first elastic body 1343 and the inner cavity of the first sleeve 1342 interference fit, ensuring a tight and reliable connection.

[0049] Optionally, to ensure a stable and reliable connection between the first elastic body 1343 and the first sleeve 1342, the first elastic body 1343 can be fixed inside the first sleeve 1342 by means of bonding or other methods. Alternatively, the end of the first elastic body 1343 facing the limiting member 14 can abut against the limiting member 14, and a baffle or other limiting structure can be provided at the end of the first elastic body 1343 facing away from the limiting member 14 to reliably limit the first elastic body 1343.

[0050] To achieve a reliable connection of the limiting member 14 within the receiving cavity 131, in one embodiment, such as Figure 1 As shown, the diameter of the opening at the end of the first sleeve 1342 facing the second seal 135 can be set to be smaller than the external dimension of the limiting member 14. In this way, one end of the limiting member 14 abuts against the inner wall of the end of the first sleeve 1342 facing the second seal 135, which can ensure the stability of the position of the limiting member 14 within the first sleeve 1342. The other end of the limiting member 14 abuts against the first elastic body 1343, thereby limiting and fixing both ends of the limiting member 14. The fixed connection of the limiting member 14 can be achieved without the need for other complicated operations such as gluing or snap-fitting. The operation is convenient and the connection reliability is good.

[0051] Optionally, during assembly, the limiting member 14 can be inserted into the first sleeve 1342 first, and then the first elastic body 1343 can be inserted into the first sleeve 1342, such that one end of the limiting member 14 abuts against the inner wall of the first sleeve 1342, and the other end abuts against the first elastic body 1343, as shown below. Figure 1 As shown, this design allows for reliable fixation of the position of the limiting component 14 without the need for other operations, making assembly simple.

[0052] The second sealing element 135 is connected to the first sleeve 1342, specifically through a detachable connection between the second connecting structure 1351 and the first connecting structure 1341. It is understood that, to ensure a sealing effect, the connection gap between the second sealing element 135 and the first sleeve 1342 needs to be sealed. The specific implementation method can be found in the description of the above embodiments, and will not be repeated here.

[0053] In some embodiments, such as Figure 1 and Figure 2 As shown, similar to the above embodiment, the second sealing element 135 includes a second sleeve 1352 and a second elastic body 1353 disposed within the second sleeve 1352. The second elastic body 1353 is press-fitted with the inner cavity of the second sleeve 1352, and a second wire hole 133 is formed on the second elastic body 1353 and communicates with the inner cavity of the second sleeve 1352. The second sleeve 1352 is connected to the first sleeve 1342, and the inner cavity of the second sleeve 1352 communicates with the inner cavity of the first sleeve 1342. A second connecting structure 1351 is disposed on the second sleeve 1352.

[0054] Specifically, the size of the second elastic body 1353 can be set to be slightly larger than the size of the inner cavity of the second sleeve 1352, so that the second elastic body 1353 is inserted into the second sleeve 1352 in a compressed state, thereby ensuring an interference fit between the second elastic body 1353 and the inner cavity of the second sleeve 1352, guaranteeing a tight and reliable connection. It is understood that, to ensure a sealing effect, the connection gap between the second sleeve 1352 and the first sleeve 1342 needs to be sealed. The specific implementation method can be referred to the description of the above embodiments, and will not be repeated here.

[0055] Optionally, to ensure a stable and reliable connection between the second elastic body 1353 and the second sleeve 1352, bonding or other methods can be used to fix the second elastic body 1353 inside the second sleeve 1352. In addition, in one embodiment, such as... Figure 1As shown, the inner size of the second sleeve 1352 can be set to be larger than the outer size of the first sleeve 1342, so that the first sleeve 1342 is inserted into the second sleeve 1352. The diameter of the opening at the end of the second sleeve 1352 facing the operating end 121 is set to be smaller than the outer size of the second elastic body 1353, so that one end of the second elastic body 1353 abuts against the inner wall of the end of the second sleeve 1352 facing the operating end 121, and the other end abuts against the first sleeve 1342. When the first sleeve 1342 is connected to the second sleeve 1352, a certain squeezing force is applied to the second elastic body 1353. This design allows for reliable fixation of the second elastic body 1353 without additional operations, simplifying assembly. Furthermore, the compression of the second elastic body 1353 by the first sleeve 1342 ensures tight contact between the second elastic body 1353 and both sleeves 1342 and 1352, eliminating the need for additional sealing rings and simplifying the structure. Moreover, the end of the second elastic body 1353 that abuts against the inner wall of the second sleeve 1352 can be tapered, and the corresponding position on the inner wall of the second sleeve 1352 can also be tapered. Figure 1 As shown, this design makes it easier to insert the second elastic body 1353 into the second sleeve 1352, and also limits the position of the second elastic body 1353 so that it does not move within the second sleeve 1352. Under the squeezing action of the first sleeve 1342 on the second elastic body 1353, the second elastic body 1353 produces effective elastic deformation, further improving the sealing effect on the traction line 12.

[0056] In some embodiments, such as Figure 1 As shown, the end of the first sleeve 1342 near the connection end 122 is filled with sealing colloid 15. The sealing colloid 15 is used to seal the gap between the inner cavity of the first sleeve 1342 and the traction tube 11, further improving the reliability of the seal.

[0057] Specifically, during assembly, the limiting member 14 and the first elastic body 1343 are sequentially inserted into the first sleeve 1342, and the traction tube 11 with the traction wire 12 threaded through it is inserted into the first wire hole 132. Finally, the end of the first sleeve 1342 near the connecting end 122 is filled with sealing glue 15. The sealing glue 15 can enter the first sleeve 1342 and come into contact with the first elastic body 1343, the first sleeve 1342, and the traction tube 11. After the sealing glue 15 dries, the first elastic body 1343, the first sleeve 1342, and the traction tube 11 can be fixed together and the gap between the inner cavity of the first sleeve 1342 and the traction tube 11 can be sealed, thereby achieving the effect of fixing and sealing. This effectively prevents the first elastic body 1343 and the traction tube 11 from loosening and avoids water entering the first sleeve 1342, which would affect the performance of the first elastic body 1343.

[0058] like Figures 3 to 5 As shown in the figure, this embodiment of the invention also provides an endoscope 2, including an operating component (not shown), a mounting base 21, an insertion tube 22, a tip end 23, and the aforementioned traction component 1. The operating component is connected to the operating end 121 and is used to control the movement of the traction cable 12. The mounting base 21 has an internal mounting cavity 211, and a first mounting hole 212 and a second mounting hole 213 are provided on the mounting base 21, which are respectively connected to the mounting cavity 211. The insertion tube 22 is inserted into the first mounting hole 212, and the end of the traction tube 11 near the connecting end 122 passes through the second mounting hole 213 and the mounting cavity 211 in sequence, and is inserted into the insertion tube 22. The tip end 23 is connected to the end of the insertion tube 22 away from the operating component and is at least connected to the connecting end 122.

[0059] Specifically, the insertion tube 22 is a main conduit structure for insertion into the human body. The lumen inside the insertion tube 22 can accommodate the traction tube 11 and other related structures, concentrating all structures within the same conduit so that each structure extends to and connects to the tip end 23. The mounting base 21 is used to connect the insertion tube 22 to the traction tube 11 and other related structures. The insertion tube 22 is inserted into the first mounting hole 212 on the mounting base 21. The traction tube 11 and other related structures can be respectively connected to the mounting base 21 so that they can pass through the mounting cavity 211 into the insertion tube 22, or communicate with the lumen of the insertion tube 22 through the mounting cavity 211. For example, the traction tube 11 passes through the second mounting hole 213 and the mounting cavity 211 on the mounting base 21, thereby entering the insertion tube 22 and extending to the tip end 23, so that the connection end 122 of the traction wire 12 is connected to the tip end 23.

[0060] Understandably, since the lumen of the insertion tube 22 can also be used for the injection and drainage of liquids such as saline, to prevent leakage at the connection between the insertion tube 22 and the first mounting hole 212, the connection can usually be sealed, for example, by filling the first mounting hole 212 with sealant. Similarly, the connection between the traction tube 11 and the second mounting hole 213 can also be sealed by filling with sealant.

[0061] In some implementations, in order to facilitate the connection between the traction tube 11 and the insertion tube 22, the first mounting hole 212 and the second mounting hole 213 can be respectively opened at the opposite ends of the mounting cavity 211, so that the traction tube 11 passes through the second mounting hole 213 and the mounting cavity 211 in a straight state and is inserted into the insertion tube 22. This design can reduce the bending of the traction tube 11 during assembly.

[0062] The endoscope 2 provided in this embodiment of the invention, by adopting the above-mentioned traction component 1, has reliable waterproof performance during use, which can effectively prevent leakage at the connection between the traction tube 11 and the traction line 12 when the injected liquid is discharged, thereby improving the convenience of use.

[0063] In some embodiments, such as Figures 3 to 6 As shown, the endoscope 2 also includes an infusion tube 24, and the mounting base 21 is provided with a third mounting hole 214 communicating with the mounting cavity 211. The infusion tube 24 is inserted into the third mounting hole 214. The inner wall of the insertion tube 22 and the traction tube 11 have at least a first gap 221 for the input of infusion fluid. The infusion tube 24 communicates with the first gap 221 through the mounting cavity 211. At least one infusion port 231 is provided on the circumferential side wall and / or the tip 23 of the insertion tube 22. The infusion port 231 communicates with the outside and the first gap 221.

[0064] Specifically, the injection tube 24 is connected to the insertion tube 22, and the first gap 221 formed in the insertion tube 22 is connected to the target position through the injection port 231. In this way, the liquid injected through the injection tube 24 can reach the target position through the first gap 221 and the injection port 231, realizing the injection operation. One end of the injection tube 24 is inserted into the third mounting hole 214, and the other end can be connected to an injection source for providing injection liquid. For example, it can be connected to the injection source through a pipe fitting such as a Luer connector 241.

[0065] Optionally, the infusion port 231 can be located on the tip end 23, on the circumferential sidewall of the insertion tube 22, or on both the tip end 23 and the circumferential sidewall of the insertion tube 22, as long as the infused liquid can reach the target position through the infusion port 231. When the infusion port 231 is located on the tip end 23, it can specifically be located on the circumferential sidewall of the tip end 23. This eliminates the need to increase the radial dimension of the tip end 23 while still fulfilling the infusion function, thus helping to reduce discomfort caused when the tip end 23 enters the human body.

[0066] Optionally, one or more filling ports 231 can be provided. When multiple filling ports 231 are provided, the efficiency of filling liquid can be improved and the filling range can be expanded. It is understood that the specific location and number of filling ports 231 can be designed according to actual needs, and the design is highly flexible.

[0067] To prevent leakage at the connection between the injection pipe 24 and the third mounting hole 214, the connection between the injection pipe 24 and the third mounting hole 214 can usually be sealed. For example, sealant can be filled into the third mounting hole 214 to achieve a seal.

[0068] In the above embodiments, by using the first gap 221 formed between the insertion tube 22 and the traction tube 11 for liquid infusion, the space inside the cavity of the insertion tube 22 is cleverly utilized. There is no need to set up a separate pipe for the flow of infusion liquid inside the insertion tube 22, thereby reducing the size of the insertion tube 22 while ensuring the infusion function, and also simplifying the structural complexity of the endoscope 2.

[0069] In some embodiments, such as Figures 3 to 6 As shown, the endoscope 2 also includes an instrument tube 25. The mounting base 21 has a fourth mounting hole 215 communicating with the mounting cavity 211. The instrument tube 25 passes through the fourth mounting hole 215 and the mounting cavity 211 in sequence, and is inserted into the insertion tube 22. One end of the instrument tube 25 extends to the tip end 23 and is connected to it. The tip end 23 has an instrument port 232 communicating with the outside, which is used for surgical instruments (not shown) inserted into the instrument tube 25 to extend out. The inner wall of the instrument tube 25 and the surgical instruments have at least a second gap 251 for allowing irrigation fluid to be output.

[0070] Specifically, the instrument tube 25 is used for inserting surgical instruments. The instrument tube 25 is inserted into the insertion tube 22 and extends to the tip 23, thereby transporting the surgical instruments to the tip 23 and allowing the surgical instruments to extend through the instrument port 232 opened on the tip 23 for surgical operation.

[0071] Understandably, to facilitate the movement of surgical instruments, a gap, namely a second gap 251, usually exists between the inner wall of the instrument tube 25 and the surgical instruments. The second gap 251 allows the injected liquid to drain out. Specifically, a negative pressure structure can be provided at the end of the instrument tube 25 away from the tip 23 to draw the injected liquid out of the body through the second gap 251, thereby carrying away contaminants through the injected liquid and achieving the purpose of cleaning.

[0072] To prevent leakage at the connection between the instrument tube 25 and the fourth mounting hole 215, the connection can usually be sealed. For example, sealant can be filled into the fourth mounting hole 215 to achieve a seal.

[0073] In the above embodiment, the irrigation fluid is drained through a second gap 251 formed between the inner wall of the instrument tube 25 and the surgical instrument. This cleverly utilizes the space within the instrument tube 25's internal lumen to meet the need for irrigation fluid drainage. Furthermore, when draining the irrigation fluid, it is not necessary to remove the instrument tube 25 and the surgical instrument from the insertion tube 22, thereby effectively shortening the surgical process, improving surgical efficiency, and reducing the burden on the patient. In addition, the above design allows for simultaneous irrigation and drainage, ensuring timely fluid drainage and maintaining pressure balance and stability at the surgical target location, which helps reduce the risk of postoperative complications.

[0074] like Figure 4 As shown, it can be understood that the endoscope 2 is usually composed of necessary structures such as camera and lighting. Therefore, the mounting base 21 can also be provided with a fifth mounting hole 216 for the connecting cable 26 of the camera, lighting and other structures to pass through. The fifth mounting hole 216 and the connecting cable 26 can be sealed and fixed by filling with sealant or other means.

[0075] In some embodiments, such as Figure 3 and Figure 4 As shown, the mounting base 21 includes a base body 217 and a cover 218. A mounting cavity 211 and a first mounting hole 212 are both formed on the base body 217, with an opening at the end of the mounting cavity 211 opposite to the first mounting hole 212. The cover 218 is connected to the base body 217 and covers the opening. A second mounting hole 213, a third mounting hole 214, and a fourth mounting hole 215 are all formed through the cover 218. It can be understood that when a fifth mounting hole 216 is provided, the fifth mounting hole 216 can be formed through the cover 218.

[0076] To prevent leakage at the connection between the cover 218 and the seat 217, the connection between the cover 218 and the seat 217 can usually be sealed. For example, sealant can be filled into the gap between the cover 218 and the seat 217 to achieve sealing and fixation.

[0077] The above embodiment divides the mounting base 21 into two parts: a base body 217 and a cover 218. The cover 218 is placed on the end of the mounting cavity 211 opposite to the first mounting hole 212, thereby positioning the second mounting hole 213, the third mounting hole 214, and the fourth mounting hole 215 opposite to the first mounting hole 212. During assembly, the traction tube 11, the infusion tube 24, the instrument tube 25, and other pipes can be inserted into their corresponding mounting holes, and then the cover 218 and the base body 217 can be connected as a whole, making the assembly operation easy to implement.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A traction assembly for use in an endoscope, characterized in that, include: Traction pipe; A traction line is threaded inside the traction tube. The traction line has an operating end and a connecting end. The operating end is used to connect to the operating component, and the connecting end is used to connect to the tip of the endoscope. A sealing assembly has an internal receiving cavity, and the sealing assembly has a first wire passage hole and a second wire passage hole, which are located at opposite ends of the receiving cavity and communicate with the outside and the receiving cavity. A limiting member is disposed in the receiving cavity and connected to the sealing assembly. The limiting member has a through hole that communicates with the first wire passage hole and the second wire passage hole. The through hole is at least coaxially arranged with the first wire passage hole. The diameter of the through hole is smaller than the outer diameter of the traction tube and larger than the outer diameter of the traction line. Wherein, one end of the traction tube near the operating end is inserted into the first wire passage hole and abuts against the limiting member; the operating end passes through the through hole and the second wire passage hole in sequence and is exposed outside the sealing assembly; the traction tube is interference-fitted with the first wire passage hole, and the portion of the traction wire located in the second wire passage hole is interference-fitted with the second wire passage hole.

2. The traction assembly as described in claim 1, characterized in that, The sealing assembly includes: The first sealing element, wherein the first wire passage hole is formed on the first sealing element; The second sealing element is connected to the first sealing element, and the second wire hole is formed on the second sealing element; The receiving cavity is formed within the first sealing member, and the limiting member is connected to the first sealing member.

3. The traction assembly as described in claim 2, characterized in that, The first sealing element is provided with a first connecting structure, and the second sealing element is provided with a second connecting structure corresponding to the first connecting structure; The second connection structure is detachably connected to the first connection structure.

4. The traction assembly as described in claim 3, characterized in that, The first sealing element includes a first sleeve and a first elastic body disposed inside the first sleeve. The first elastic body is interference-fitted with the inner cavity of the first sleeve. The first wire hole is formed on the first elastic body and communicates with the inner cavity of the first sleeve. Wherein, the second sealing member is connected to the first sleeve, the second wire hole is connected to the inner cavity of the first sleeve; a portion of the inner cavity of the first sleeve forms the receiving cavity, the limiting member is connected to the first sleeve; the first connecting structure is disposed on the first sleeve.

5. The traction assembly as described in claim 4, characterized in that, The second sealing element includes a second sleeve and a second elastic body disposed inside the second sleeve. The second elastic body is interference-fitted with the inner cavity of the second sleeve. The second wire passage hole is formed on the second elastic body and communicates with the inner cavity of the second sleeve. The second sleeve is connected to the first sleeve, and the inner cavity of the second sleeve is in communication with the inner cavity of the first sleeve; the second connecting structure is disposed on the second sleeve.

6. The traction assembly as described in claim 4, characterized in that, The end of the first sleeve near the connection end is filled with a sealing compound, which is used to seal the gap between the inner cavity of the first sleeve and the traction tube.

7. An endoscope, characterized in that, include: The traction assembly as described in any one of claims 1-6; An operating component, connected to the operating terminal, is used to control the movement of the traction line; The mounting base has an internal mounting cavity, and the mounting base has a first mounting hole and a second mounting hole, which are respectively connected to the mounting cavity. An insertion tube is inserted into the first mounting hole, and one end of the traction tube near the connecting end passes through the second mounting hole and the mounting cavity in sequence, and is inserted into the insertion tube; The tip end is connected to the end of the insertion tube away from the operating component and is at least connected to the connecting end.

8. The endoscope as described in claim 7, characterized in that, The endoscope also includes an irrigation tube, and the mounting base is provided with a third mounting hole that communicates with the mounting cavity, and the irrigation tube is inserted into the third mounting hole; The insertion tube has a first gap between its sidewall and the traction tube for supplying infusion fluid, and the infusion tube is connected to the first gap via the mounting cavity; at least one infusion port is provided on the sidewall and / or the tip of the insertion tube, and the infusion port is connected to the outside and the first gap.

9. The endoscope as described in claim 8, characterized in that, The endoscope also includes an instrument tube, and the mounting base is provided with a fourth mounting hole that communicates with the mounting cavity. The instrument tube passes through the fourth mounting hole and the mounting cavity in sequence and is inserted into the insertion tube. One end of the instrument tube extends to the tip end and is connected to the tip end. The instrument opening at the tip is provided with an instrument port that communicates with the outside, and the instrument port is used for surgical instruments inserted inside the instrument tube to extend out; there is at least a second gap between the side wall of the instrument tube and the surgical instruments for the output of irrigation fluid.

10. The endoscope as described in claim 9, characterized in that, The mounting base includes: The mounting cavity and the first mounting hole are both formed on the mounting body, and the end of the mounting cavity opposite to the first mounting hole has an opening; A cover is connected to the base and is placed over the opening. The second mounting hole, the third mounting hole, and the fourth mounting hole are all opened through the cover.

Images