Connector, insertion part and endoscope

Abstract

The application discloses a connecting piece, an insertion part and a endoscope, and relates to the technical field of endoscopes. The connecting piece has a first connecting section and a second connecting section, and a deformation region is arranged on the side wall of the connecting piece. The deformation region is arranged on at least one of the first connecting section and the second connecting section, and the deformation region of the connecting piece is arranged to be capable of being deformed under pressure, so that the deformation region of the connecting piece is radially inwardly retracted, so that the first connecting section or the second connecting section has more excess space during connection with a curved tube or a cannula, thereby reducing the possibility that adhesive between the first connecting section and the curved tube is scraped off and reducing the possibility that adhesive between the second connecting section and the cannula is scraped off, improving the stability of connection between the first connecting section and the curved tube and the stability of connection between the second connecting section and the cannula, and solving the problem of the stability of adhesion between a connector and a corresponding connecting structure in the prior art.

Description

Technical Field

[0001] This invention relates to the field of endoscopes, and more particularly to a connector, an insertion part, and an endoscope. Background Technology

[0002] An endoscope is a medical optical instrument that enters the body through natural cavities (such as the mouth, nose, and anus) or tiny incisions to directly observe the internal condition of internal organs and perform procedures such as biopsy, hemostasis, and resection.

[0003] Traditional endoscopes typically feature a flexible, serpentine skeleton and a passively flexible cannula. The skeleton and cannula are connected via an adapter, usually welded to the skeleton and bonded to the cannula. However, in practice, the adapter and cannula often detach, causing the cannula to malfunction. Connection failure is more likely to occur under prolonged use or external pressure.

[0004] It is evident that although the above-mentioned adhesive bonding method is simpler to operate than welding, its safety and reliability are not ideal. How to improve the stability of the bonding between the adapter pipe and the corresponding connection structure is an urgent problem to be solved. Summary of the Invention

[0005] The present invention discloses a connector, an insertion part, and an endoscope to at least partially improve the above-mentioned technical problems.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] On one hand, embodiments of this application provide a connector for use in the insertion part of an endoscope. The connector has a first connecting section and a second connecting section. The first connecting section is used to connect a curved tube, and the second connecting section is used to connect an insertion cannula. A deformation region is provided on the side wall of the connector. The deformation region is located in at least one of the first connecting section and the second connecting section. The deformation region is configured to deform under pressure, so that the deformation region of the connector radially retracts inward.

[0008] On the other hand, this application also provides an insertion part for use in an endoscope, the insertion part comprising: a curved tube, a cannula, and a connector as described above, the curved tube being connected to the first connecting segment, and the cannula being connected to the second connecting segment.

[0009] In another aspect, embodiments of this application also provide an endoscope, including the insertion portion as described above.

[0010] The technical solution adopted in this invention can achieve the following beneficial effects: The connector, insertion part, and endoscope provided in this application, by setting a deformation area on the side wall of the connector applied to the insertion part of the endoscope, specifically setting the deformation area in at least one of the first connecting segment and the second connecting segment, and setting the deformation area of ​​the connector to be able to deform under pressure, so that the deformation area of ​​the connector radially shrinks inward, so that the first connecting segment or the second connecting segment has more spare space during the connection with the curved tube or the insertion tube, thereby reducing the possibility of the adhesive between the first connecting segment and the curved tube being scraped off and the possibility of the adhesive between the second connecting segment and the insertion tube being scraped off, improving the stability of the connection between the first connecting segment and the curved tube and the stability of the connection between the second connecting segment and the insertion tube, thereby optimizing the anti-detachment performance between the connector and its corresponding connection structure, and solving the problem of low bonding stability between the transfer tube and the corresponding connection structure in the prior art. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A schematic diagram of the structure of an insertion part according to an embodiment of this application is shown.

[0013] Figure 2 A schematic diagram of a connector, a bent tube, and a cannula assembly according to an embodiment of this application is shown.

[0014] Figure 3 An exploded view of a connector, a bent tube, and a cannula according to an embodiment of this application is shown.

[0015] Figure 4 A schematic diagram of a connector according to an embodiment of this application is shown.

[0016] Figure 5 A structural schematic diagram of a connector according to an embodiment of this application is shown from another perspective.

[0017] Figure 6 This illustration shows a partial structural diagram of a connector in one embodiment of the present application, in which an instrument tube and other components are inserted.

[0018] Figure 7 This is a structural schematic diagram of a connector according to another embodiment of the present application.

[0019] Figure 8 A schematic diagram of a curved tube according to an embodiment of this application is shown.

[0020] Figure 9 A schematic diagram of the structure of an endoscope according to one embodiment of this application is shown.

[0021] In the image: 1. Endoscope;

[0022] 10. Insertion section;

[0023] 110. Connector; 111. First connecting section; 112. Second connecting section; 113. Deformation area; 1131. First area; 1132. Second area; 114. Guide surface; 115. First positioning structure;

[0024] 120. Bending tube; 121. Second positioning structure; 122. Welding hole; 123. Snake joint; 124. Rivet;

[0025] 130. Intubation;

[0026] 140. Instrument tube. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0030] The inventive concept of this application is described here:

[0031] An endoscope is a medical optical instrument that enters the body through natural cavities (such as the mouth, nose, and anus) or tiny incisions to directly observe the internal condition of internal organs and perform procedures such as biopsy, hemostasis, and resection.

[0032] In traditional endoscope designs, an actively bending serpentine skeleton and a passively bending cannula work together, connected by an adapter. The adapter is firmly fixed to the serpentine skeleton by welding, while the connection to the cannula relies on adhesive bonding.

[0033] Taking gastrointestinal examinations as an example, doctors insert an endoscope through the mouth, along the esophagus, and into the stomach and intestines. During this process, the endoscope needs to be constantly adjusted to precisely locate the lesion. However, in actual operation, the connecting tube and the insertion tube often become dislodged.

[0034] Specifically, when the patient's intestines are narrow, the external pressure increases as the endoscope passes through in a curved manner. The adhesion point cannot withstand the pressure, causing the adapter tube to separate from the insertion tube, and the insertion function to be lost instantly.

[0035] Therefore, the safety and reliability of this connection method are greatly compromised when used frequently over a long period of time or when faced with external pressures from the complex human body environment, which can easily lead to connection failure and pose a great risk to medical operations.

[0036] The inventors discovered that the root cause of the above problem is that during the bonding process of the adapter and the insert, since the diameters of the adapter and the insert are similar, the glue applied by the user to the adapter or the insert can easily be scraped off during the assembly process, which leads to the problem of the adapter and the insert easily detaching.

[0037] Based on this, the inventors provide a connector, an insertion part, and an endoscope, wherein the connector is configured to deform under pressure, so that there is a certain amount of extra space during the assembly process of the connector and the cannula, avoiding or reducing the possibility of glue being scraped off and falling off, thereby improving the stability of the connection between the connector and the cannula.

[0038] The following is in conjunction with the appendix Figures 1-9 The present application provides a detailed description of a connector 110, an insertion part 10, and an endoscope 1 through specific embodiments and application scenarios.

[0039] Please also refer to Figures 1-4 This application provides an insertion part 10, which may include a bent tube 120, a insertion tube 130, and a connector 110. The connector 110 may have a first connecting segment 111 and a second connecting segment 112. The first connecting segment 111 may be used to connect the bent tube 120, and the second connecting segment 112 may be used to connect the insertion tube 130.

[0040] Please also refer to Figure 4 and Figure 5 A deformation region 113 is provided on the side wall of the connector 110. The deformation region 113 is located in at least one of the first connecting section 111 and the second connecting section 112. The deformation region 113 is configured such that the connector 110 can be compressed and the deformation region 113 deforms, so that the deformation region 113 of the connector 110 radially retracts inward. This allows the connector 110 to be connected more smoothly to the bent tube 120 or the insertion tube 130. Specifically, when the connector 110 needs to be connected to the bent tube 120 or the insertion tube 130, the deformation area 113 can be deformed under pressure, allowing this part of the connector 110 to retract radially, thus making it easier to insert into the mating component. For example, when inserting the connector 110 into an insertion tube 130 with a hole diameter slightly smaller than its original outer diameter, applying pressure to the deformation area 113 to retract it can smoothly complete the insertion operation, reducing installation difficulty and improving assembly efficiency. At the same time, during the installation process of the connector 110 with the insertion tube 130, the connector 110 can be compressed and the corresponding deformation area 113 can be deformed to form a larger gap space between the connector 110 and the corresponding connecting structure (e.g., the insertion tube 130). This increases the assembly gap between the two, thereby allowing the connector 110 and the corresponding connecting structure to have a surplus gap to accommodate the glue, avoiding or reducing the risk of the glue being scraped off.

[0041] Taking the assembly process of connector 110 and insert 130 as an example, the assembly gap at the joint is very small. If there is no deformation area 113, during the fitting process, connector 110 and insert 130 can easily interfere and get stuck due to a very small angular deviation, thus failing to complete the fitting operation smoothly. Therefore, manual adjustment of the angle is required to refit them, which leads to a large amount of manpower required for the fitting operation of connector 110 and insert 130, increasing labor costs. In a mechanical assembly scenario, if connector 110 and insert 130 interfere and get stuck due to a very small angular deviation, the mechanical assembly process will still force them to fit together, which can easily damage connector 110 and insert 130, resulting in a lower yield rate and also increasing production costs.

[0042] Furthermore, considering that the endoscope 1 is a relatively precise medical device, it is often desirable to have a large internal space and a small external size of the insertion part 10. However, considering the smooth assembly of the connector 110 and the cannula 130, increasing the assembly gap between the two would reduce the internal space of the insertion part 10 or increase the external size of the insertion part 10, which obviously contradicts the original design concept of the endoscope 1 and the industry's pursuit.

[0043] Therefore, the connector 110 provided in this application embodiment can reduce the assembly gap between the connector 110 and the insertion tube 130 while achieving a smoother assembly.

[0044] Furthermore, since the connector 110 has high overall structural strength and needs to connect the bent tube 120 and the insertion tube 130, its structural rigidity is typically high. This makes it difficult for the entire insertion part 10 to bend at the connector 110, thereby reducing the flexibility of the entire insertion part 10. Therefore, the deformation region 113 in this embodiment can also reduce the structural rigidity of the connector 110, making it easier for the connector 110 to deform at the deformation region 113, thus improving the flexibility of the entire insertion part 10.

[0045] It should be noted that the embodiments of this application do not limit the specific form or structure of the deformable region 113. For example, in some embodiments, the deformable region 113 may be a thin-walled structure, a slotted structure, an elastic element embedded structure, or a corrugated structure, etc. The specific design can be made according to the actual situation and is not limited here. For ease of explanation, the deformable region 113 will be described as a notch in the following description.

[0046] Please see Figure 6 In this embodiment, setting the deformation area 113 as a notch can also help to avoid components passing through the connector 110, such as instrument tubes 140, water injection tubes, or cables. This can prevent or reduce the compression of instruments passing through the connector 110 by the insertion part 10 during bending.

[0047] Please refer to it again. Figures 3-5 This application does not limit the specific location of the deformation region 113. In this application, the deformation region 113 can extend from the port of one of the first connecting segment 111 and the second connecting segment 112 towards the port of the other. In a more specific embodiment, the deformation region 113 extends from the port of the second connecting segment 112 towards the first connecting segment 111, which facilitates the installation and engagement of the connector 110 and the insertion tube 130. In other embodiments, the deformation region 113 extends from the second connecting segment 112 to penetrate the first connecting segment 111, which further facilitates the installation and engagement of the connector 110 and the bent tube 120. The specific configuration can be adjusted according to actual circumstances.

[0048] Furthermore, in this embodiment, taking the deformation region 113 not penetrating the first connecting segment 111 as an example, the deformation region 113 includes a first region 1131 and a second region 1132. The second region 1132 is connected to the first region 1131 and is close to the first connecting segment 111. The length of the second region 1132 in the circumferential direction of the connector 110 is greater than the length of the deformation region 113 in the circumferential direction of the connector 110. Since the second region 1132 is connected to the first region 1131, when the connector 110 is subjected to radial pressure, the second region 1132 can serve as an auxiliary region for the deformation of the first region 1131. When the first region 1131 deforms, the second region 1132 can deform in tandem, sharing some of the pressure and deformation, playing a buffering role, preventing the first region 1131 from being damaged due to excessive force, and making the entire deformation process more stable and controllable.

[0049] It should be noted that the specific number of deformation regions 113 is not limited in the embodiments of this application. For example, in some embodiments, one or more deformation regions 113 may be provided in the circumferential direction of the side wall of the connector 110, and the specific number may be set according to the actual situation.

[0050] In a preferred embodiment, the number of deformable regions 113 on the circumference of the connector 110 is one. It is understood that after deformation, since the deformable region 113 is a notch, the connector 110 is compressed, causing the notch to close. The edges on both sides of the notch are compressed and stacked together, meaning the sidewalls of the connector 110 are compressed into a prismatic structure. This causes the outer circumferential surface of the connector 110 to become less smooth, potentially leading to jamming and friction during the connection process with the insertion tube 130. If too many deformable regions 113 are provided on the circumference of the connector 110, the aforementioned prismatic structure will increase, further increasing the difficulty of assembling the connector 110 and the insertion tube 130. Therefore, limiting the number of deformable regions 113 on the circumference of the connector 110 to one can reduce the operational difficulty of assembling the connector 110 and the insertion tube 130 and improve assembly efficiency.

[0051] Furthermore, in some embodiments, the radial dimension of the second connecting segment 112 of the connector 110 gradually decreases from near the first connecting segment 111 to away from the first connecting segment 111. This also facilitates the installation of the insertion tube 130. Specifically, this gradually decreasing radial dimension forms a chamfered or guide-like structure, which guides the insertion tube 130 when connecting it to the second connecting segment 112. The insertion tube 130 can slide more smoothly along the outer wall of the second connecting segment 112 and mate more easily, reducing installation difficulty, improving assembly efficiency, and reducing installation errors and time waste caused by size mismatch or difficulty in mating.

[0052] Furthermore, after the cannula 130 is connected to the second connecting segment 112, because the radial dimension gradually changes from near the first connecting segment 111 to far away from the first connecting segment 111, the fit between the cannula 130 and the second connecting segment 112 can form an effect similar to an interference fit, and this fit has different degrees of tightness at different positions. It is relatively tight near the first connecting segment 111, and relatively loose but still maintains a certain clamping force far away from the first connecting segment 111, so that the cannula 130 can fit tightly with the second connecting segment 112 at different positions, thereby improving the stability of the entire connection structure and preventing problems such as loosening or falling off of the cannula 130 during use.

[0053] Furthermore, in one embodiment, the second connecting segment 112 has elastic flexibility, and the outer diameter of the second connecting segment 112 is slightly larger than the inner diameter of the cannula 130. This allows the second connecting segment 112 to form a tight contact with the inner surface of the cannula 130 after being fitted into it. This interference fit effectively prevents relative sliding or loosening between the connecting segment 110 and the cannula 130 during use, ensuring the stability of the connection and guaranteeing that the endoscope 1 will not affect the examination or treatment effect due to loosening of the connection during operation.

[0054] Furthermore, due to the elasticity of the second connecting segment 112, it can adapt to minor changes or irregularities in the inner diameter of the cannula 130 to a certain extent. Even if there are some manufacturing errors in the inner diameter of the cannula 130 or slight deformation due to factors such as the usage environment, the elastic second connecting segment 112 can maintain a tight fit with the cannula 130 through its own deformation, maintain a stable connection state, and improve the adaptability of the connector 110 to different batches of cannulas 130 or under different working conditions.

[0055] Please see Figure 7In the figure, the solid line represents the structure of the second connecting segment 112 before being compressed, and the dashed line represents the structure of the second connecting segment 112 after being compressed. In this embodiment, the cross-section of the second connecting segment 112 is elliptical. The second connecting segment 112 is configured such that when the second connecting segment 112 is fitted onto the insertion tube 130, the inner surface of the second connecting segment 112 abuts against the inner surface of the insertion tube 130 along the long axis of the cross-section of the second connecting segment 112. In other words, in this embodiment, before the second connecting segment is assembled with the insertion tube 130, the cross-section of the second connecting segment 112 is elliptical. At this time, pressure can be applied to the second connecting segment along the major axis of the ellipse (the up and down direction in the figure), which can shorten the major axis of the ellipse on the cross-section of the second connecting segment and lengthen the minor axis (the left and right direction in the figure), ultimately squeezing the cross-section of the second connecting segment 112 into a circle. Then, the second connecting segment 112 is assembled with the insertion tube 130. After assembly, the second connecting segment 112 will apply a radially outward force to the insertion tube 130, which can increase the friction between the second connecting segment and the insertion tube 130, thereby making the connection between the second connecting segment 112 and the insertion tube 130 tighter.

[0056] Please refer to it again. Figure 4 and Figure 5 In some embodiments, the connector 110 may also have a guide surface 114 located at the port of the second connecting segment 112. The guide surface 114 guides the insertion tube 130 to mate with the port of the second connecting segment 112. This allows the guide surface 114 to provide clear docking direction and position guidance for the insertion tube 130, enabling operators to quickly align the insertion tube 130 with the port of the second connecting segment 112 without spending a lot of time on alignment adjustments, thus improving the efficiency and accuracy of installation.

[0057] For some delicate endoscope insertion part 10 assembly operations, the docking of the cannula 130 and the connector 110 requires high precision and operational skills. The presence of the guide surface 114 reduces this operational difficulty, allowing even relatively inexperienced operators to complete the docking work more easily, reducing the possibility of docking failure or component damage due to improper operation.

[0058] It should be noted that the specific shape and structure of the guide surface 114 are not limited in the embodiments of this application. For example, in one embodiment, it can be a chamfered guide surface 114, a conical guide surface 114, a spiral guide surface 114, or a stepped guide surface 114, etc. The specific design can be made according to the actual situation.

[0059] Please continue reading. Figures 4-6Furthermore, in some other embodiments, the side wall of the connector 110 is also provided with a first positioning structure 115. The first positioning structure 115 is located in the first connecting section 111. The connector 110 is positioned and assembled with the bent tube 120 through the first positioning structure 115, so that the notch in the circumferential direction of the connector 110 corresponds to the distribution path of the element passing through the connector 110. As mentioned above, in this embodiment, after the insertion part 10 is assembled and the element is passed through it, the element can be stored in the notch. The embodiments of this application do not limit the above-mentioned element, such as water pipes, cables, etc.

[0060] Please also refer to Figure 4 , Figure 6 as well as Figure 8 Specifically, as mentioned above, in this embodiment, the surface of the bent tube 120 is further provided with a second positioning structure 121 that cooperates with the first positioning structure 115. The first positioning structure 115 can be positioned and assembled with the second positioning structure 121. This application does not limit the specific form and structure of the first positioning structure 115 and the second positioning structure 121. For example, in one embodiment, both the first positioning structure 115 and the second positioning structure 121 can be set as holes or grooves. In another embodiment, the first positioning structure 115 and the second positioning structure 121 can be set as a hole-shaft fit, etc. The specific configuration can be determined according to actual conditions and is not limited here.

[0061] It is understood that the above embodiments are all described using the connection method of connector 110 and insertion tube 130 as an example. In some embodiments, connector 110 and bending tube 120 can also be connected and assembled using the above connection method. For details, please refer to the foregoing content, which will not be repeated here.

[0062] In another embodiment, the bent tube 120 can be integrally formed with the connector 110, which can further improve the stability of the connection between the bent tube 120 and the insertion tube 130. Furthermore, in yet another embodiment, the bent tube 120 can be separately formed from the connector 110. In this embodiment, the outer surface of the bent tube 120 can be provided with a through welding hole 122. The projection of the welding hole 122 onto the radial projection of the connector 110 can cover the projection of the first connecting segment 111, thus facilitating the welding of the bent tube 120 and the connector 110 together. This also improves the stability of the connection between the bent tube 120 and the insertion tube 130.

[0063] Please refer to it again. Figures 1-3In some embodiments, the bent tube 120 may include a plurality of serpentine segments 123, which may be connected by rivets 124 arranged circumferentially thereon. The serpentine segments 123 located at the proximal end may be connected to the connector 110. As mentioned above, in this embodiment, the distribution of the rivets 124 and the deformation area 113 is not restricted.

[0064] For example, in one embodiment, the circumferential distribution path of the rivet 124 on the snake joint 123 corresponds to the circumferential distribution path of the deformation region 113 on the connector 110. That is, in this embodiment, the bending direction of the snake joint 123 can have a certain angle with the bending direction of the instrument tube 140 passing through the connector 110, for example, they can be perpendicular to each other. At this time, during the bending process of the snake joint 123, the connector 110 is difficult to bend. At this time, the connector 110 can play a certain protective role for the instrument tube 140 passing through the connector 110. When the snake joint 123 needs to turn flexibly in the complex cavity environment of the human body, the connector 110 can protect the instrument tube 140 passing through it to effectively resist the direct impact of external bending force on the instrument tube 140, avoid the instrument tube 140 from the problem of tube wall rupture and internal structural damage due to excessive force, and thus help to extend the service life of the instrument tube 140 passing through the connector 110. Furthermore, since the deformation area 113 is located on the path of the rivet 124, when the snake joint 123 is pulled and bent, it can reduce or prevent the effect of the instrument tube 140 inserted in the connector 110 being pulled or compressed due to the snake joint, thus preventing the instrument tube 140 from collapsing or being damaged.

[0065] In another embodiment, for example, the distribution path of the rivet 124 in the axial direction of the snake joint 123 is offset from the distribution path of the deformed region 113 in the axial direction of the connector 110. In other words, in this embodiment, the bending direction of the snake joint 123 can be the same as the bending direction of the instrument tube 140 passing through the connector 110. This can enhance the avoidance effect of the deformation area 113 on the instrument tube 140. When the snake joint 123 bends, the instrument tube 140 passing through the connector 110 bends along with it, and other components passing through the connector 110, such as cables and water pipes, will also bend along with it. At this time, the instrument tube 140 can be embedded in the deformation area 113, which gives the instrument tube 140 and other components passing through the connector 110 more space. This can not only reduce the squeezing effect of other components passing through the connector 110, such as cables and water pipes, on the instrument tube 140, but also make the bending radius of the instrument tube 140 smaller than the bending radius of the snake joint 123, thereby helping to reduce the degree to which the instrument tube 140 bends with the bending of the snake joint 123.

[0066] Please see Figure 9 This application embodiment also provides an endoscope 1, which may include the insertion part 10 as described above. In this application embodiment, the endoscope 1 may be a bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral scope, laryngoscope, colposcope, laparoscope, arthroscope, etc. This application embodiment does not specifically limit the type of endoscope.

[0067] In summary, the connector 110, insertion part 10, and endoscope 1 provided in this application, by providing a deformation region 113 on the side wall of the connector 110 applied to the insertion part 10 of the endoscope 1, specifically, the deformation region 113 is provided in at least one of the first connecting section 111 and the second connecting section 112, and the deformation region 113 of the connector 110 is configured to deform under pressure, so that the deformation region 113 of the connector 110 radially retracts, so that the first connecting section 111 or the second connecting section 112 can be connected to the bent tube 120 or the insertion tube 130. The process allows for more margin, which reduces the likelihood of the adhesive between the first connecting section 111 and the bent tube 120 being scraped off, as well as the likelihood of the adhesive between the second connecting section 112 and the insertion tube 130 being scraped off. This improves the stability of the connection between the first connecting section 111 and the bent tube 120, and the stability of the connection between the second connecting section 112 and the insertion tube 130. As a result, the anti-detachment performance between the connector 110 and its corresponding connection structure is optimized, solving the problem of low bonding stability between the transfer tube and its corresponding connection structure in the prior art.

[0068] It should be noted that, in this document, 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.

[0069] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A connector applied to an insertion portion of an endoscope, characterized by comprising: The connecting piece has a first connecting section for connecting the curved tube and a second connecting section for connecting the cannula; The side wall of the connecting piece is provided with a deformation region, which is located in at least one of the first connecting section and the second connecting section, and is configured to allow the connecting piece to be pressed and deformed so that the deformation region is radially retracted, thereby increasing the gap space for accommodating glue between the connecting piece and the corresponding connecting structure during insertion of the connecting piece into the connecting structure.

2. The connection of claim 1, wherein The deformation region extends from the port of one of the first connecting section and the second connecting section to the port of the other.

3. The connection of claim 2, wherein The deformation region includes a first region and a second region in communication with the first region, and the second region is close to the first connecting section, and the length of the second region in the circumferential direction of the connecting piece is greater than the length of the deformation region in the circumferential direction of the connecting piece. The deformation region extends from the second connecting section to the first connecting section.

4. The connection of claim 1, wherein The radial dimension of the second connecting section of the connecting piece gradually decreases from the direction close to the first connecting section to the direction away from the first connecting section. The connecting piece has a guide surface at the port of the second connecting section, which is used to guide the cannula to dock at the port of the second connecting section. The second connecting section has a elastic deflection, and the outer diameter of the second connecting section is slightly larger than the inner diameter of the cannula. The cross section of the second connecting section is elliptical, and the second connecting section is configured to abut with the inner surface of the cannula in the direction of the long axis of the cross section of the second connecting section when the second connecting section is sleeved on the cannula.

5. The connection of any one of claims 1-4, wherein, The deformation region is a notch for avoiding the elements passing through the connecting piece.

6. The connection of claim 5, wherein The side wall of the connecting piece is further provided with a first positioning structure at the first connecting section, and the connecting piece is positioned and assembled with the curved tube through the first positioning structure, so that the notch corresponds to the distribution path of the instrument passing through the connecting piece in the circumferential direction of the connecting piece. The number of notches arranged in the circumferential direction of the connecting piece is one. The notch is used to avoid the instrument tube passing through the connecting piece.

7. An insertion section applied to an endoscope, characterized by The connecting piece includes: The curved tube is connected to the first connecting section, and the cannula is connected to the second connecting section.

8. The insert of claim 7, wherein, When the deformation region is a notch, the curved tube includes a plurality of snake bones connected by rivets arranged in the circumferential direction, the snake bone at the proximal end is connected to the connecting piece, and the distribution path of the rivet in the circumferential direction of the snake bone corresponds to the distribution path of the notch in the axial direction of the connecting piece, or the distribution path of the rivet in the circumferential direction of the snake bone is staggered with the distribution path of the notch in the axial direction of the connecting piece.

9. The insert of claim 7, wherein, The curved tube and the connecting piece are integrally formed. And / or, the outer surface of the curved tube is provided with a through weld hole, which is radially projected on the connecting piece, the projection of the weld hole covering the projection of the first connecting section.

10. An endoscope characterized by comprising: The insert according to any one of claims 7-9.

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