Pipe, insertion part, endoscope, and processing method for pipe

Abstract

A pipe (10), an insertion part, an endoscope, and a method for processing the pipe (10). The pipe (10) is used in an insertion part of an endoscope. A part of the pipe wall of the pipe (10) is recessed towards the interior to form a connection part (100). A first gap (400) is arranged between at least one end of the connection part (100) and the pipe wall of the corresponding pipe (10) in the axial direction of the pipe (10). A holding space configured for holding an internal assembly of the insertion part is formed between the side of the connection part (100) proximal to the axis of the pipe (10) and the inner wall of the pipe (10). A mounting space is formed on the side of the connection part (100) distal to the axis of the pipe (10). The mounting space is configured for mounting a sleeve (21), and the mounting space forms an opening in communication with the interior of the pipe (10) at a position corresponding to the first gap (400). The arrangement of the mounting space on the side of the connection part (100) distal to the axis of the pipe (10) may help ensure the vision for welding the sleeve (21) and the connection part (100) for fixation, improve the welding quality between the connecting part (100) and the sleeve (21), and improve the connection stability between the connection part (100) and the sleeve (21).

Description

Pipe fitting, inserting portion, endoscope and processing method of pipe fitting Technical Field

[0001] The present invention belongs to the technical field of endoscopes, and specifically relates to a pipe, an insertion portion, an endoscope, and a processing method of the pipe. Background Art

[0002] Endoscopes are widely used in modern medicine. Endoscopes include an insertion part, which includes an active bending section and a passive bending section. The active bending section is connected to a traction rope. By pulling the traction rope, the active bending section is bent, thereby controlling the bending direction of the active bending section and acquiring image information of the target position.

[0003] In the prior art, a sleeve is fixed inside the passive bending section, through which the traction rope is passed. The sleeve limits the radial position of the traction rope within the insertion tube. However, during use of the passive bending section, the sleeve can easily detach from the passive bending section, preventing the traction rope from stably performing its pulling function within the passive bending section. Summary of the Invention

[0004] The purpose of this application is to provide a pipe fitting, an insertion portion, an endoscope and a processing method for the pipe fitting to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application provides a pipe fitting, which is applied to the insertion part of an endoscope, and part of the wall of the pipe fitting is recessed toward the interior thereof to form a connecting portion, and along the axial direction of the pipe fitting, a first gap is provided between at least one end of the connecting portion and the corresponding wall of the pipe fitting; a clamping space for clamping the internal components of the insertion portion is formed between the side of the connecting portion close to the axis of the pipe fitting and the inner wall of the pipe fitting; an installation space is formed on the side of the connecting portion away from the axis of the pipe fitting, and the installation space is used to install a sleeve, and the position of the installation space corresponding to the first gap forms an opening connected to the interior of the pipe fitting, and the opening is used for allowing a traction rope located inside the pipe fitting to enter the interior of the sleeve corresponding to the installation space.

[0007] In a second aspect, an embodiment of the present application provides an insertion portion, comprising the pipe provided in the embodiment of the first aspect, and further comprising a sleeve and a traction rope, wherein the sleeve is installed in the installation space and the traction rope is passed through the sleeve.

[0008] In a third aspect, an embodiment of the present application provides an endoscope, comprising the insertion portion provided in the embodiment of the second aspect.

[0009] In a fourth aspect, an embodiment of the present application provides a method for processing a pipe fitting, which is used to process the pipe fitting provided by the embodiment of the first aspect. The specific processing steps include: constructing a first slit on the pipe wall of the pipe fitting; wherein the extension direction of the first slit intersects with the axial direction of the pipe fitting, so as to define a stamping area between the first slit and the end of the pipe fitting or between two adjacent first slits; stamping the stamping area toward the inside of the pipe fitting to form a connecting portion in the stamping area, and forming an opening at the corresponding first slit.

[0010] The technical solution adopted in this application can achieve the following beneficial effects:

[0011] In the present application, the wall of the pipe fitting is recessed toward the interior thereof to form a connecting portion, and an installation space is formed on the side of the connecting portion away from the axis of the sleeve, and the sleeve is fixed in the installation space. Since the installation space is located on the side of the connecting portion away from the axis of the pipe fitting, it is convenient to obtain a welding field of view during the process of welding and fixing the sleeve and the connecting portion, thereby improving the welding quality of the connecting portion and the sleeve and improving the connection stability of the connecting portion and the sleeve.

[0012] Furthermore, by setting the connecting portion to be recessed toward the interior of the pipe fitting, a clamping space is formed between the axial side of the connecting portion close to the pipe fitting and the inner wall of the pipe fitting. The connecting portion can be clamped on the internal component of the insertion portion, thereby fixing the position of the internal component and avoiding the position of the internal component being offset during the bending process of the pipe fitting, which affects the normal bending of the pipe fitting.

[0013] In addition, the connecting part separates the internal components of the sleeve and the insertion part. The connecting part can clamp the internal components and support the sleeve, thereby stabilizing the relative position of the sleeve and the internal components. Moreover, since the traction rope is passed through the sleeve, the relative position between the traction rope and the internal components is stabilized, thereby preventing the traction rope from being obstructed by the internal components during movement, affecting the normal movement of the traction rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] FIG1 is a schematic structural diagram of a pipe fitting provided in some embodiments of the present application;

[0016] FIG2 is a first schematic diagram of the cooperation between a pipe fitting and a pulling assembly provided in some embodiments of the present application;

[0017] FIG3 is a second schematic diagram of the cooperation between a pipe fitting and a pulling assembly provided in some embodiments of the present application;

[0018] FIG4 is a schematic diagram of the use of a tube provided by some embodiments of the present application in an endoscope;

[0019] FIG5 is a schematic diagram of the cooperation between a pipe fitting and an active bending section provided in some embodiments of the present application;

[0020] FIG6 is a schematic diagram of the structure of a pipe during processing provided by some embodiments of the present application.

[0021] In the figure: 10-pipe fitting, 100-connecting part, 110-welding point, 120-second gap, 130-connecting sub-part, 140-third gap, 200-positioning groove, 300-through hole, 400-first gap, 500-opening, 600-stamping area, 21-sleeve, 22-traction rope, 30-active bending section, 40-instrument tube, 50-module line. DETAILED DESCRIPTION

[0022] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0023] It should be noted that in each embodiment of the present application, "proximal end" and "distal end" refer to the distance between the endoscope and its accessories and the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0024] In the prior art, the sleeve is easily detached from the passive bending section, resulting in the traction rope being unable to stably perform the pulling function. Specifically, after the sleeve is detached from the passive bending section, the sleeve will slide along the traction rope, exposing part of the traction rope inside the passive bending section. Due to the loss of the protective and limiting function of the sleeve, during the bending process of the insertion portion, the radial position of the traction rope in the passive bending section is unstable, and the traction rope is prone to friction and entanglement with the instruments, module lines, etc. inside the passive bending section, resulting in the traction rope being unable to be stably pulled and moved within the passive bending section, thereby affecting the pulling effect of the traction rope on the active bending section. In addition, the sleeve is prone to slide into the interior of the active bending section along the traction rope, rubbing against the active bending section, thereby causing damage to the structure of the active bending section.

[0025] The inventors have discovered that in the prior art, the sleeve is only welded to the inner wall of the passive bending section at its two axial ends. Since the welding position is located inside the passive bending section, the operator's field of vision is limited during welding, and the welding position of the sleeve and the passive bending section may be offset, or the welding between the two may not be in place, resulting in an unstable connection between the sleeve and the passive bending section.

[0026] In view of this, an embodiment of the present application provides a pipe fitting, which is applied to the insertion part of an endoscope. Referring to Figures 1 to 4, the installation space is exposed to the pipe fitting 10 to facilitate the welding of the sleeve 21 and the passive bending section, thereby improving the welding quality between the two and improving the connection stability between the two.

[0027] The pipe 10 provided in this embodiment of the present application has a portion of its wall recessed toward its inner wall to form a connecting portion 100. A first gap 400 is defined along the axial direction of the pipe 10 between at least one end of the connecting portion 100 and the corresponding portion of the pipe wall 10. The first gap 400 penetrates the pipe wall 10, connecting the interior of the pipe 10 with the exterior.

[0028] When the connecting portion 100 is located at the end of the pipe 10, that is, when the end surface of the connecting portion 100 is part of the end surface of the pipe 10, a first slit 400 is provided at the end of the connecting portion 100 farther from the end of the pipe 10. The first slit 400 separates the pipe wall where the connecting portion 100 is located from the other pipe walls, facilitating the concavity of the pipe wall to form the connecting portion 100. Because the connecting portion 100 is located at the end of the pipe 10, the side of the connecting portion 100 closer to the end of the pipe 10 is not restricted by the pipe wall of the pipe 10 and can be directly concaved. When the connecting portion 100 is located in the pipe wall outside the end of the pipe 10, that is, when there is a pipe wall at both axial ends of the connecting portion 100, the first slit 400 needs to be provided at both ends of the connecting portion 100 to facilitate the concavity of the pipe wall of the pipe 10 to form the connecting portion 100.

[0029] A clamping space for clamping the internal components of the inserting part is formed between the side of the connecting part 100 close to the axis of the pipe fitting 10 and the inner wall of the pipe wall. The internal components of the inserting part include the instrument tube 40, the module line 50 and other components. The internal components are passed through the pipe fitting 10 and routed through the internal space of the pipe fitting 10. Since the connecting part 100 is recessed toward the inside of the pipe fitting 10, the space between the inner wall of the pipe fitting 10 and the internal components is reduced, so that the connecting part 100 can form a clamping effect on the internal components. There are two types of clamping of the internal components by the connecting part 100. One is that when the internal components are installed in place and the pipe fitting 10 is not bent, the connecting part 100 directly adheres to the outer surface of the internal components to clamp the internal components and fix the position of the internal components. The other is that when the internal component is installed in place and the pipe 10 is not bent, at least part of the connecting portion 100 is not in contact with the internal component, and there is an installation gap between the connecting portion 100 and the internal component. However, after the pipe 10 is bent, the connecting portion 100 can be pressed against the outer surface of the internal component to clamp the internal component and stabilize the position of the internal component.

[0030] During the use of the pipe fitting 10, the pipe fitting 10 is used as a passive bending section of the insertion part. During the bending process of the pipe fitting 10, since the pipe fitting 10 and the internal component are made of different materials, the plasticity of the pipe fitting 10 is different from that of the internal component, and the degree of rebound of the two after bending is different, there will be relative movement between the pipe fitting 10 and the internal component, causing the internal component to move inside the pipe fitting 10. In the embodiment of the present application, the internal component is clamped by the connecting part 100, thereby avoiding or reducing the effect of the internal component inside the pipe fitting 10, so that the bending state of the pipe fitting 10 and the internal component are synchronized as much as possible, which facilitates the operator to control the insertion part and improves the control accuracy of the insertion part.

[0031] An installation space is formed on the side of the connecting portion 100 facing away from the axis of the pipe 10. The installation space is used to install the sleeve 21. An opening 500 communicating with the interior of the pipe 10 is formed at a position corresponding to the first gap 400 in the installation space. The opening 500 is used to allow the traction rope 22 located inside the pipe 10 to enter the interior of the sleeve 21 corresponding to the installation space. The first gap 400 corresponding to the installation space refers to the first gap 400 located axially in the installation space. When the connecting portion 100 is recessed toward the interior of the pipe 10, the two sidewalls of the first gap 400 gradually separate, and the distance between the two sidewalls gradually increases, thereby forming the opening 500 communicating with the interior of the pipe 10. This facilitates the traction rope 22 located inside the pipe 10 to extend from the pipe 10 and enter the interior of the sleeve 21 installed in the installation space.

[0032] The sleeve 21 is sleeved on the outside of the traction rope 22, and can limit the traction rope 22 in the radial direction of the pipe 10, limit the range of movement of the traction rope 22, separate the traction rope 22 from the internal components in the clamping space, avoid friction and entanglement between the traction rope 22 and the internal components, and avoid the internal components from hindering the movement of the traction rope 22, thereby ensuring that the traction rope 22 can move smoothly in the passive bending section and ensure that the traction rope 22 can smoothly pull the active bending section 30 at the far end of the passive bending section.

[0033] An installation space is formed on the side of the connecting portion 100 away from the axis of the pipe fitting 10, and the installation space is used to fix the sleeve 21. Since the installation space is located on the side of the connecting portion 100 away from the inside of the pipe fitting 10, when fixing the sleeve 21 and the connecting portion 100, it is easier for the operator to observe whether the connecting portion 100 and the sleeve 21 are connected in place. In a specific implementation, the connecting portion 100 is generally welded to the sleeve 21. The installation space is exposed to the pipe fitting 10, which makes it easier for the operator to perform welding operations and also facilitates the operator to obtain a welding field of view to ensure that the connecting portion 100 is aligned with the sleeve 21, and facilitates the operator to judge whether the connecting portion 100 and the sleeve 21 are welded in place, thereby improving the welding quality of the connecting portion 100 and the sleeve 21, improving the welding stability of the connecting portion 100 and the sleeve 21, and avoiding the sleeve 21 from being separated from the connecting portion 100. For example, after the connecting portion 100 is welded to the sleeve 21, a welding point 110 is formed on the connecting portion 100. Referring to FIG1 , the surface area of ​​the connecting portion 100 enclosed by the dotted circle is the welding location of the connecting portion 100 and the sleeve 21. To facilitate observation of the position of the welding point 110, the sleeve 21 is not shown in FIG1 .

[0034] In some embodiments of the present application, the sleeve 21 corresponding to a traction rope 22 can be divided into multiple sections. Accordingly, the pipe 10 also has multiple connecting portions 100 fixed to the sleeve 21. A traction rope 22 passes through multiple sleeves 21 in sequence, and multiple sleeves 21 simultaneously limit the position of the same traction rope 22, as shown in Figure 3. This layout can reduce the demand for sleeves 21 and also reduce the impact of the passive bending section on the sleeve 21 during the bending process. The sleeve 21 is less likely to change shape under the bending action of the passive bending section, and the connection between the sleeve 21 and the connecting portion 100 is more stable.

[0035] In other embodiments of the present application, there is only one sleeve 21 corresponding to each traction rope 22. The sleeve 21 is sleeved over the traction rope 22. The sleeve 21 extends from the interior of the pipe 10 through the opening 500 into the installation space, or extends from the installation space into the interior of the pipe 10 through the opening 500, as shown in FIG2 . The single sleeve 21 provides better protection for the traction rope 22 and further improves the smoothness of the traction of the traction rope 22 within the passive bending section.

[0036] In some preferred embodiments of the present application, the connecting portion 100 has a second gap 120, which separates the connecting portion 100 into two independent connecting sub-portions 130. The two connecting sub-portions 130 are distributed along the circumference of the pipe 10, as shown in Figures 1 to 3.

[0037] The second slit 120 is connected to the first slit 400, which allows the connection portion 100 to be divided into two connecting sub-portions 130 distributed along the circumference of the tube 10. Due to the presence of the second slit 120, when installing the sleeve 21, a portion of the sleeve 21 can be squeezed into the interior of the tube 10 until it is located in the space where the second slit 120 is located, as shown in Figure 4. While the size of the sleeve 21 remains unchanged, the installation space created by the reduced depression of the connection portion 100 can also accommodate the sleeve 21. The reduced depression of the connection portion 100 can correspondingly increase the size of the clamping space, expand the size of the internal components, and expand the size of the instrument tube 40, making it easier to insert medical devices into the instrument tube 40. In addition, because the second slit 120 separates the insertion portion into two connecting sub-portions 130, to ensure the stability of the weld between the connection portion 100 and the sleeve 21, each connecting sub-portion 130 is welded to the sleeve 21.

[0038] Along the circumference of the pipe 10, one end of the connecting sub-portion 130 close to the second slit 120 is a free end, and the free end can swing under the action of an external force. When the pipe 10 bends, the sleeve 21 will bend along with the bending of the pipe 10. When the sleeve 21 is in a bent state, one side of the sleeve 21 is compressed and the other side is stretched. Since the sleeve 21 is fixed to the connecting sub-portion 130, when the sleeve 21 bends, it can pull the connecting sub-portion 130 to swing along with the shape change of the sleeve 21. The connecting sub-portion 130 changes to adapt to the bending changes of the sleeve 21 to avoid the sleeve 21 and the connecting sub-portion 130 from being desoldered. If the connecting sub-portion 130 cannot swing, the sleeve 21 will have a tendency to move relative to the connecting sub-portion 130 when it bends, which can easily cause the sleeve 21 and the connecting sub-portion 130 to be desoldered. In addition, the size of the instrument tube 40 of the internal component is generally set to be larger. Since the connecting sub-portion 130 has a free end, during the process of assembling the internal component into the pipe 10, the instrument tube 40 is likely to come into contact with the pipe 10. The connecting sub-portion 130 with a free end can adaptively deform after contacting the instrument tube 40 to avoid scratching the instrument tube 40.

[0039] The insertion portion is generally provided with two traction ropes 22, which respectively drive the active bending section 30 of the insertion portion to bend in different directions, and both traction ropes 22 are covered with a sleeve 21. The distal end of the traction rope 22 is fixed to the active bending section 30, and the proximal end of the traction rope 22 is fixed to the dial of the endoscope handle. The traction rope 22 is pulled and moved by controlling the rotation of the impeller. The active bending section 30 bends in the direction of the traction rope 22 on which side is pulled. The traction rope 22 being pulled is tightened, while the traction rope 22 on the other side that is not pulled is in a tensioned state and can be pulled at any time.

[0040] When the active bending section 30 is driven to bend by the traction rope 22, the pipe 10, which serves as the passive bending section, will also bend as the traction of the traction rope 22 occurs. Since the internal components are located inside the pipe 10, the internal components, especially the instrument tube 40, will also change as the shape of the pipe 10 changes. Unlike the bending of the pipe 10, there is an installation gap between the instrument tube 40 and the inner wall of the pipe 10. During the bending process, the instrument tube 40 may deviate toward the installation gap until the tube wall of the instrument tube 40 is tightly pressed against the inner wall of the pipe 10, and the bending shape of the instrument tube 40 will become relatively stable. Therefore, during the bending process of the pipe 10, the connecting sub-portion 130 formed by the depression of the tube wall of the pipe 10 will also be in close contact with the instrument tube 40.

[0041] In addition, a sleeve 21 is fixed in the installation space formed by the connecting sub-section 130, and a traction rope 22 is passed through the sleeve 21. The traction rope 22 is fixed between the endoscope handle and the active bending section 30. The traction rope 22 is in a taut or tensioned state, and the position of the traction rope 22 in the radial direction of the tube 10 does not change. During the bending process of the tube 10, the position of the connecting sub-section 130 changes, thereby abutting against the traction rope 22, and an interaction force is generated between the two.

[0042] It can be understood that after the pipe fitting 10 is bent, the instrument tube 40 can be pressed against the connecting sub-portion 130, and the connecting sub-portion 130 can be pressed against the traction rope 22, so that the connecting sub-portion 130 is pressed between the traction rope 22 and the instrument tube 40. Therefore, the traction rope 22 can press against the connecting sub-portion 130, so that the connecting sub-portion 130 is further pressed against the outer surface of the instrument tube 40, providing a clamping force for the instrument tube 40, avoiding the position movement of the instrument tube 40 inside the pipe fitting 10, and stabilizing the relative position of the instrument tube 40 and the pipe fitting 10.

[0043] In some preferred embodiments, the pipe fitting 10 is a plastic pipe section. The plastic pipe section can reduce the probability of the pipe fitting 10 rebounding during use, thereby improving the comfort of the human body during the process of inserting the pipe fitting 10 into the human body. When an external force is applied to an object, the object undergoes elastic deformation when the external force is small, and when the external force exceeds a certain value, the object undergoes irreversible deformation, which is called plastic deformation. It can be understood that a plastic pipe section means that the pipe section has plasticity, and the pipe section cannot recover after deformation. In the process of inserting the insertion part into the human body through a surgical incision or a natural cavity of the human body, since the pipe fitting 10 is a plastic pipe section, the pipe fitting 10 can maintain the bending shape unchanged after being bent by force, and there will be no rebound phenomenon, thereby avoiding damage and discomfort to the human body caused by the rebound of the pipe fitting 10.

[0044] In some specific embodiments, the pipe 10 can be made of stainless steel and annealed to enhance its plasticity. In other specific embodiments, the wall thickness of the pipe 10 can be reduced by grinding, thereby reducing its elasticity and enhancing its plasticity, thereby meeting the plasticity requirements of the pipe 10. This application does not limit the source of the plasticity of the plastic pipe segment.

[0045] Moreover, when the pipe fitting 10 is a plastic pipe section, the plasticity difference between the pipe fitting 10 and the internal components, especially the instrument tube 40, is greater. During the bending process of the pipe fitting 10, the relative position changes between the instrument tube 40, the module line 50 and other components and the pipe fitting 10 are more obvious, that is, the instrument tube 40 and the module line 50 will have more obvious movement. Therefore, the connecting part 100 is set to two connecting sub-parts 130, so that the connecting sub-parts 130 can abut and cooperate with the traction rope 22, so that the connecting sub-parts 130 can fit on the outside of the instrument tube 40, provide a clamping force for the instrument tube 40, and prevent movement between the connecting sub-parts 130 and the instrument tube 40. In addition, since the pipe fitting 10 serves as a passive bending section, during the use of the passive bending section, the passive bending section is easily bent under the restriction of the internal cavity, which will cause the position change between the passive bending section and the instrument tube 40 to be more obvious. The connecting part 100 is set to two connecting sub-parts 130 to increase the restriction on the instrument tube 40, so that while ensuring the insertion comfort of the pipe fitting 10, the position of each component inside the pipe fitting 10 is guaranteed to be stable, and the insertion part can be ensured to be used stably.

[0046] To ensure stable welding between the sleeve 21 and the connecting portion 100, the connecting portion 100 has a larger area for welding to the sleeve 21. In some preferred embodiments, the connecting portion 100 further comprises a third slit 140, the extension direction of which intersects the axial direction of the pipe 10. The third slit 140 divides the connecting portion 100 into two portions arranged side by side along the axial direction of the pipe 10. With this arrangement, the portions of the connecting portion 100 on both sides of the third slit 140 are welded to the sleeve 21 to form weld points 110. If the pipe 10 bends and the sleeve 21 changes shape with the pipe 10, the connecting portion 100 on both sides of the third slit 140 can deform with the sleeve 21. The relative positions of the weld points 110 on both sides of the third slit 140 can be fine-tuned, preventing desoldering between the sleeve 21 and the connecting portion 100 and improving the stability of the connection between the sleeve 21 and the pipe 10.

[0047] In other preferred embodiments, the pipe 10 is provided with multiple through-holes 300 extending through the wall of the pipe 10. Providing multiple through-holes 300 can reduce the rigidity of the pipe 10, lowering the force required to bend the pipe 10 and making it easier to bend. Because the through-holes 300 increase the rigidity of the pipe 10, the connecting portion 100 is more easily deformed under the pressure of the traction rope 22.

[0048] The plurality of through-holes 300 are spaced apart on the wall of the tube 10. The plurality of through-holes 300 are independently arranged and not interconnected. This prevents the plurality of through-holes 300 from being interconnected, thereby preventing the formation of large openings 500 in the wall of the tube 10. This prevents the tube 10 from having excessively low rigidity, ensuring that the tube 10 still has a certain degree of support. Even if an external force is excessive and the tube 10 is bent to its maximum bending angle, the wall of the tube 10 will not bend, thereby preventing damage to the structural strength of the tube 10. This ensures the normal use of the insertion portion and allows the insertion portion to be smoothly inserted into the human body.

[0049] The tube wall of the pipe fitting 10 is also provided with a positioning groove 200, which is used to position and cooperate with the stamping die corresponding to the pipe fitting 10. During the processing of the pipe fitting 10, the connecting portion 100 is generally processed by a stamping process. The positioning groove 200 is provided so as to cooperate with the stamping die to facilitate the stamping process of the connecting portion 100. In addition, the positioning groove 200 can reduce the rigidity of the pipe fitting 10, making the connecting portion 100 easier to deform. Moreover, in order to facilitate the stamping process of the connecting portion 100, the positioning groove 200 is generally located on the same circumference of the pipe fitting 10 as the connecting portion 100, further improving the deformation ability of the connecting portion 100.

[0050] In some preferred embodiments, the pipe 10 includes two connecting portions 100 located at either end of a first radial direction, and two positioning slots 200 located at either end of a second radial direction. The first radial direction is perpendicular to the second radial direction. As shown in FIG4 , the first radial direction is indicated by the dotted line aa, and the second radial direction is indicated by the dotted line bb. Both the first and second radial directions are radial directions of the pipe 10. With this arrangement, the two connecting portions 100 have equal deformation capabilities, resulting in a symmetrical structure of the pipe 10. Regardless of which side of the traction rope 22 is pulled, the pipe 10 undergoes similar deformations.

[0051] The embodiment of the present application further provides a method for processing a pipe fitting 10, which is used to process the pipe fitting 10 provided in any of the above embodiments. The specific processing steps include:

[0052] A first slit 400 is constructed on the wall of the pipe 10; wherein the extension direction of the first slit 400 intersects with the axial direction of the pipe 10, so as to define a stamping area 600 between the first slit 400 and the end of the pipe 10 or between two adjacent first slits 400, as shown in Figure 6.

[0053] After the punching area 600 is determined, a punching device is used to punch the punching area 600 toward the inside of the pipe 10. The pipe wall of the pipe 10 corresponding to the punching area 600 is recessed to form the connecting portion 100, and the first gap 400 is deformed to form the opening 500 of the installation space.

[0054] In some preferred processing methods, before stamping the stamping area 600, a second slit 120 is formed on the tube wall of the pipe 10 corresponding to the stamping area 600. The second slit 120 intersects with the first slit 400 and divides the stamping area 600 into two parts, thereby forming two connecting sub-parts 130 after stamping. In addition, due to the presence of the second slit 120, the stamping equipment can reduce the processing accuracy requirements during the stamping operation, thereby improving the stamping efficiency while ensuring the stamping effect, thereby making the stamping operation more convenient.

[0055] Similarly, if a third slit 140 needs to be provided on the connecting portion 100 , the third slit 140 also needs to be constructed on the corresponding tube wall of the tube 10 before punching the punching area 600 .

[0056] The gap can be constructed by laser cutting or other cutting methods, which are not specifically limited in this application.

[0057] The present application also provides an insertion portion, comprising the pipe fitting 10 provided in any of the above embodiments, and further comprising a sleeve 21 and a traction rope 22. The sleeve 21 is installed in the installation space and welded to the connecting portion 100, and the traction rope 22 is passed through the sleeve 21. As shown in FIG5 , the insertion portion further comprises an active bending section 30, which is located at the distal end of the pipe fitting 10.

[0058] At least one end of the sleeve 21, which secures and mounts the control, extends axially out of the opening 500 of the mounting space of the tube 10, located outside the mounting space. As shown in the detailed view in FIG2 , a portion of the sleeve 21 extends into the interior of the tube 10. As the sleeve 21 grows in length, its contact with the traction rope 22 increases, exerting a stronger force on the corresponding connecting portion 100 of the sleeve 21. This allows the connecting portion 100 to adhere more tightly to the surface of the instrument tube 40.

[0059] The present application also provides an endoscope, including the insertion portion provided by any of the above embodiments. The endoscope provided by the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The present application does not impose any specific restrictions on the type of endoscope.

[0060] 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 in the scope of protection of the present invention.

Claims

1. A tube used for the insertion portion of an endoscope, characterized in that: Part of the wall of the pipe (10) is recessed toward the inside thereof to form a connecting portion (100); along the axial direction of the pipe (10), a first gap (400) is provided between at least one end of the connecting portion (100) and the corresponding wall of the pipe (10); A clamping space for clamping the internal components of the inserting portion is formed between a side of the connecting portion (100) close to the axis of the pipe (10) and an inner wall of the pipe (10); The connecting portion (100) forms an installation space on a side away from the axis of the pipe (10), and the installation space is used to install a sleeve (21). The installation space forms an opening (500) connected to the interior of the pipe (10) at a position corresponding to the first gap (400). The opening (500) is used to allow a traction rope (22) located inside the pipe (10) to enter the interior of the sleeve (21) corresponding to the installation space.

2. A pipe fitting according to claim 1, characterized in that: The connecting portion (100) has a second gap (120), and the second gap (120) separates the connecting portion (100) into two mutually independent connecting sub-portions (130), and the two connecting sub-portions (130) are distributed along the circumference of the pipe (10).

3. A pipe fitting according to claim 1 or 2, characterized in that: The pipe fitting (10) is a plastic pipe section; And / or, the connecting portion (100) has a third slit (140), the extension direction of the third slit (140) intersects the axial direction of the pipe (10), and the third slit (140) divides the connecting portion (100) into two parts arranged side by side along the axial direction of the pipe (10); And / or, the pipe fitting (10) is provided with a plurality of through holes (300), the through holes (300) penetrate the pipe wall of the pipe fitting (10), and the plurality of through holes (300) are distributed at intervals on the pipe wall of the pipe fitting (10).

4. A pipe fitting according to claim 1 or 2, characterized in that: The tube wall of the tube fitting (10) is further provided with a positioning groove (200), and the positioning groove (200) is used for positioning and matching with a stamping die corresponding to the tube fitting (10).

5. A pipe fitting according to claim 4, characterized in that: The pipe (10) comprises two connecting portions (100) distributed at two ends of a first radial direction thereof, and the pipe (10) further comprises two positioning grooves (200) distributed at two ends of a second radial direction thereof, wherein the first radial direction is perpendicular to the second radial direction.

6. An insertion portion, characterized in that: The pipe fitting (10) comprises the pipe fitting (10) according to any one of claims 1 to 5, and further comprises a sleeve (21) and a traction rope (22), wherein the sleeve (21) is installed in the installation space, and the traction rope (22) is passed through the sleeve (21).

7. The inserting portion according to claim 6, characterized in that: At least one end portion of the sleeve (21) extends out of the opening (500) of the installation space along the axial direction of the pipe (10) and is located outside the installation space.

8. An endoscope, characterized in that: Comprising the insertion portion according to claim 6 or 7.

9. A method for processing a pipe fitting, characterized in that: For processing the pipe fitting (10) according to any one of claims 1 to 5, the specific processing steps include: The first slit (400) is constructed on the tube wall of the tube (10); wherein the extension direction of the first slit (400) intersects with the axial direction of the tube (10), so as to define a stamping area (600) between the first slit (400) and the end of the tube (10) or between two adjacent first slits (400); The punching area (600) is punched toward the inside of the pipe (10) to form the connecting portion (100) in the punching area (600), and the opening (500) is formed at a location corresponding to the first gap (400).

10. A pipe processing method according to claim 9, characterized in that: Before stamping the stamping area (600) toward the interior of the pipe (10), the processing method further comprises: A second slit (120) is formed on the tube wall of the tube (10) corresponding to the stamping area (600), and the second slit (120) intersects with the first slit (400).

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