Channel assembly, endoscope and assembly method

Abstract

This invention relates to the field of endoscope technology, and more particularly to a channel assembly, an endoscope, and an assembly method. It includes a channel connector, an instrument tube, a rigid tube, and an intermediate sleeve. The inner diameter of the intermediate sleeve is larger than the outer diameter of the first connecting section. A protrusion is provided on the proximal inner wall of the intermediate sleeve, and a deformable portion is provided at the distal end of the intermediate sleeve. This application utilizes the rigid tube to induce radial deformation in the deformable portion at the end of the connection stroke, radially compressing the instrument tube. Combined with the action of the protrusion on the instrument tube, this ensures that the instrument tube remains coaxial with the mounting groove. When the instrument tube abuts against the proximal end face of the mounting groove, the end face gap between the channel connector and the instrument tube is stably eliminated. The entire assembly process has low installation resistance, high fault tolerance, simple operation, and stable assembly quality. It eliminates the delicate work of inserting a mandrel into the instrument tube, reducing the operational requirements for assembly personnel, thereby effectively improving product production quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, and more particularly to a channel assembly, an endoscope, and an assembly method. Background Technology

[0002] An endoscope is a medical device that allows direct access to human cavities for examination, providing doctors with comprehensive diagnostic information. An endoscope typically includes: an insertion section for insertion into the body, a handle for controlling the bending of the insertion section's tip, and a display device for visualizing the internal environment of the body's natural cavities. Through the coordination of these three parts, the endoscope enables visualization of the body's interior, exploration of lesions, and treatment. The handle has a channel connector that communicates with the instrument channel within the insertion section. During examinations using the endoscope, surgical instruments can be inserted through the channel connector and extended from the distal end of the insertion section via the instrument channel, allowing the instruments to directly reach the cavity for manipulation. Alternatively, the channel connector can be connected to positive or negative pressure, allowing for the injection of media or aspiration of samples into the cavity through the instrument channel.

[0003] In the production and use of endoscopes, the quality and efficiency of the installation of the channel connector and instrument tube have a significant impact on the production and use of endoscopes. In the process of realizing this invention, the applicant discovered that the assembly efficiency is low due to the limitations of the connection structure between the channel connector and the instrument tube. Summary of the Invention

[0004] The purpose of this application is to provide a channel assembly, endoscope, and assembly method to solve the aforementioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In a first aspect, this application provides a channel assembly for use in an endoscope, comprising:

[0007] A channel connector, wherein a mounting groove is provided at the distal end of the channel connector, and a stepped surface is provided at the distal end of the mounting groove;

[0008] An instrument tube, the proximal end of which includes a first connecting segment and a second connecting segment, the first connecting segment being located at the proximal end of the second connecting segment, and a rigid tube being sleeved on the second connecting segment, the proximal end of which is provided with a stop surface;

[0009] An intermediate sleeve has an inner diameter larger than the outer diameter of the first connecting section. The inner wall of the proximal end of the intermediate sleeve has a protrusion. The distance between the protrusion and the axis of the mounting groove is smaller than the outer diameter of the first connecting section. The distal end of the intermediate sleeve has a deformable part. The stop surface is used to mate with the stepped surface so that during the process of the instrument tube being inserted into the mounting groove, the deformable part of the intermediate sleeve located between the first connecting section and the mounting groove is axially compressed, so that the deformable part undergoes radial deformation and abuts against the instrument tube.

[0010] Secondly, this application provides an endoscope including a handle, an insertion part, and a channel assembly as described above, wherein the proximal end of the insertion part is connected to the distal end of the handle, the channel connector is disposed on the handle, and the rigid tube is disposed inside the handle.

[0011] Thirdly, this application provides a method for assembling the channel assembly or endoscope described above, comprising the following steps:

[0012] Before the instrument tube is inserted into the intermediate sleeve, the rigid tube and the instrument tube are glued and fixed.

[0013] Alternatively, before abutting the proximal end of the instrument tube and the proximal end wall of the mounting groove, apply adhesive to the outer peripheral wall of the first connecting section and the outer peripheral wall of the intermediate sleeve.

[0014] Alternatively, after the proximal end of the instrument tube abuts against the inner wall of the mounting slot, glue is injected through the through hole on the distal peripheral wall of the channel connector to bond and fix the instrument tube, intermediate sleeve, and mounting slot together.

[0015] The technical solution provided in this application can achieve the following beneficial effects:

[0016] This application utilizes a rigid tube to induce radial deformation of the deformable portion at the end of the connection stroke, radially compressing the instrument tube. Combined with the action of the protrusion on the instrument tube, this ensures that the instrument tube and the mounting groove remain coaxial. When the instrument tube abuts against the near end face of the mounting groove, the end face gap between the channel connector and the instrument tube is stably eliminated. The entire assembly process has low installation resistance, high fault tolerance, simple operation, and stable assembly quality. It eliminates the need for the delicate work of inserting the mandrel into the instrument tube, reducing the operational requirements for assembly personnel, thereby effectively improving product production quality and efficiency. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the endoscope in this application;

[0019] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 This is a schematic diagram of the channel component of this application;

[0021] Figure 4This is a schematic diagram of the internal structure of the channel component in this application;

[0022] Figure 5 This is a schematic diagram of the internal structure of the channel connector in this application;

[0023] Figure 6 This is an exploded view of the channel component in this application;

[0024] Figure 7 This is a side view of the channel component of this application;

[0025] Figure 8 yes Figure 7 Sectional view along the BB direction;

[0026] Figure 9 yes Figure 8 A magnified view of a section at point C;

[0027] Figure 10 This is a schematic diagram of the structure of the intermediate sleeve in this application;

[0028] Figure 11 This is a cross-sectional view of the intermediate sleeve of this application;

[0029] Figure 12 This is an assembly diagram of the channel component of this application, showing the instrument tube and the mounting slot nearly mated together.

[0030] Figure 13 This is an assembly diagram of the channel component of this application after the instrument tube and the mounting slot are properly connected.

[0031] In the picture:

[0032] 10. Handle; 20. Insertion part; 100. Channel connector; 110. Mounting groove; 120. Stepped surface; 130. Through hole; 200. Instrument tube; 210. First connecting section; 220. Second connecting section; 300. Rigid tube; 310. Stop surface; 400. Intermediate sleeve; 410. Protrusion; 420. Deformation part; 421. Clearance cavity; 600. First cavity; 700. Second cavity. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] In various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the usage environment. 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".

[0036] To improve the assembly quality between the endoscope's access connector and instrument tube, especially for nephroscopes, where guidewires may be inserted backwards into the endoscope (i.e., the guidewire enters from the instrument tube port distal to the endoscope insertion section and exits through the access connector on the handle), gaps or steps between the access connector and the instrument tube increase the difficulty of guidewire passage, and similar issues arise when inserting surgical instruments. Therefore, the manufacturing process of the access connector and instrument tube needs to eliminate gaps and steps between them. However, in existing technologies, the angle between the access connector and the insertion section causes a bend in the proximal end of the instrument tube. To prevent the curved section from collapsing, a rigid tube is used to sleeve it. On the other hand, to eliminate the gap and step between the channel connector and the instrument tube, a mandrel is generally used to assist in the connection and installation between the channel connector and the instrument tube. However, when using the sampling mandrel, the greater the insertion depth of the mandrel into the instrument tube, the higher the risk of damage to the instrument tube. If the insertion is too shallow, the connection is not firm, and when the instrument tube and the channel connector are made end-to-end, the frictional resistance between the instrument tube and the channel connector can cause the mandrel to fall out of the instrument tube. This requires the mandrel to be reinserted into the instrument tube, which not only reduces assembly efficiency but also increases the operational requirements for assembly personnel.

[0037] In view of this, this application provides a channel assembly, an endoscope, and an assembly method. By using a rigid tube to induce radial deformation of the deformable part at the end of the connection stroke, the instrument tube is radially compressed. Combined with the action of the protrusion on the instrument tube, the instrument tube and the mounting groove are kept coaxial. When the instrument tube abuts against the proximal end face of the mounting groove, the end face gap between the channel connector and the instrument tube can be stably eliminated. The entire assembly process has low installation resistance, high fault tolerance, simple operation, and stable assembly quality. It eliminates the delicate work of inserting the mandrel into the instrument tube and reduces the operational requirements of the assembly personnel, thereby effectively improving product production quality and production efficiency, as shown in the following embodiments.

[0038] Example 1

[0039] This embodiment provides a channel assembly for use in an endoscope, such as... Figures 1-4 As shown, it includes:

[0040] Channel connector 100, such as Figure 5As shown, the distal end of the channel connector 100 is provided with a mounting groove 110, and the distal end of the mounting groove 110 is provided with a stepped surface 120.

[0041] Instrument tube 200, such as Figure 6 As shown, the proximal end of the instrument tube 200 includes a first connecting section 210 and a second connecting section 220. The first connecting section 210 is located at the proximal end of the second connecting section 220. A rigid tube 300 is sleeved on the second connecting section 220. A stop surface 310 is provided at the proximal end of the rigid tube 300. The rigid tube 300 can be a metal tube or a rigid resin tube.

[0042] Intermediate sleeve 400, such as Figures 7-11 As shown, the inner diameter of the intermediate sleeve 400 is larger than the outer diameter of the first connecting section 210. A protrusion 410 is provided on the proximal inner wall of the intermediate sleeve 400. The intermediate sleeve 400 and / or the protrusion 410 can be made of existing flexible materials that can deform under pressure. In this embodiment, the intermediate sleeve 400, the protrusion 410, and the inner wall of the mounting groove 110 cooperate to keep the instrument tube 200 and the mounting groove 110 corresponding to the position of the protrusion 410 coaxial. The flexible material can specifically be a biocompatible resin. The axial distance between the protrusion 410 and the mounting groove 110 is smaller than that between the first connecting section 210 and the second connecting section 210. The outer diameter of the connecting section 210 and the distal end of the intermediate sleeve 400 are provided with a deformable part 420. The stop surface 310 is used to cooperate with the stepped surface 120 so that during the process of the instrument tube 200 being inserted into the mounting groove 110, the deformable part 420 of the intermediate sleeve 400 located between the first connecting section 210 and the mounting groove 110 is axially compressed, so that the deformable part 420 undergoes radial deformation to abut against the instrument tube 200, so as to achieve coaxial connection between the channel connector 100 and the proximal end of the instrument tube 200, forming an instrument channel. The instrument channel is used to pass at least one of surgical instruments, perfusion media, body fluids and samples.

[0043] During installation, the rigid tube 300 can be first fixedly connected to the second connecting section 220 of the instrument tube 200, specifically by gluing, snap-fitting, or expansion jointing, without specific limitations; then the first connecting section 210 is inserted into the mounting groove 110 through the intermediate sleeve 400. For example, the proximal end of the intermediate sleeve 400 can be inserted into the mounting groove 110 first, allowing the deformed part 420 to abut against the stepped surface 120, and then the first connecting section 210 is inserted into the intermediate sleeve 400. The inner diameter of the 00 is larger than the outer diameter of the first connecting section 210, resulting in very little insertion resistance between the first connecting section 210 and the intermediate sleeve 400. This reduces assembly difficulty and provides space for secondary adjustment of the posture between the instrument tube 200 and the channel connector 100, improving assembly tolerance. Then, after the first connecting section 210 passes through the protrusion 410, the protrusion 410 influences the corresponding instrument tube 200 to remain coaxial with the mounting groove 110. At this point, a certain amount of insertion resistance to the instrument tube 200 is increased. Subsequently, as... Figure 12 As shown, when the first connecting section 210 is further inserted to near the proximal end face of the mounting groove 110, the stop surface 310 and the deformable part 420 are connected, and in conjunction with the stepped surface 120, the deformable part 420 of the intermediate sleeve 400 located between the first connecting section 210 and the mounting groove 110 is axially compressed, causing the deformable part 420 to undergo radial deformation until it abuts against the instrument tube 200. At this time, using the constraint of the protrusion 410 on the first connecting section 210 as a fulcrum, when the deformable part 420 deforms and abuts against the instrument tube 200... The posture of the first connecting section 210 within the mounting groove 110 is corrected to improve the coaxiality of the first connecting section 210 and the mounting groove 110, thereby stabilizing and eliminating the end face gap and step between the channel connector 100 and the instrument tube 200. The entire assembly process has low installation resistance, high fault tolerance, simple operation, and stable assembly quality. It eliminates the delicate work of inserting the mandrel into the instrument tube, reducing the operational requirements for assembly personnel, thus effectively improving product production quality and efficiency. Subsequently, after the instrument tube 200 is inserted into place, as... Figure 13 As shown, the connection between the instrument tube 200, intermediate sleeve 400, mounting groove 110 and rigid tube 300 can be bonded and cured. This effectively eliminates the connection gap and step between the instrument tube 200 and the channel connector 100, and also achieves the pre-positioning of the rigid tube 300. This ensures the quality of product assembly and production, saves the subsequent positioning and adjustment work of the rigid tube 300, and improves product production efficiency.

[0044] Another example is that the intermediate sleeve 400 can be first fitted onto the first connecting section 210, so that the deformable part 420 is close to the stop surface 310 of the rigid tube 300. Then, the instrument tube 200 and the intermediate sleeve 400 are inserted together into the mounting groove 110 of the channel connector 100. During the insertion process, the protrusion 410, the instrument tube 200 and the inner wall of the mounting groove 110 cooperate to radially constrain the corresponding first connecting section 210, thereby improving the fit between the first connecting section 210 and the mounting groove 110. The coaxiality is such that as the first connecting section 210 is further inserted, when the first connecting section 210 continues to be inserted to near the proximal end face of the mounting groove 110, the stop surface 310 abuts against the deformable part 420, and in conjunction with the stepped surface 120, axially compresses the deformable part 420 of the intermediate sleeve 400 located between the first connecting section 210 and the mounting groove 110, causing the deformable part 420 to undergo radial deformation until it abuts against the instrument tube 200. At this time, the protrusion 410 approximately... Using the bundle as a fulcrum, when the deformable part 420 deforms and abuts against the instrument tube 200, the posture of the first connecting section 210 in the mounting groove 110 is corrected, improving the coaxiality between the first connecting section 210 and the mounting groove 110. This stabilizes and eliminates the end face gap and step between the channel connector 100 and the instrument tube 200. The entire assembly process has low installation resistance, high fault tolerance, simple operation, and stable assembly quality. It eliminates the delicate work of inserting the mandrel into the instrument tube 200, reducing the operational requirements for assembly personnel, thereby effectively improving product production quality and efficiency. After the instrument tube 200 is inserted into place, the connection between the instrument tube 200, intermediate sleeve 400, mounting groove 110, and rigid tube 300 can be bonded and cured. This effectively eliminates the connection gap and step between the instrument tube 200 and the channel connector 100, and also achieves the pre-positioning of the rigid tube 300. This ensures the product assembly production quality and eliminates the need for subsequent positioning and adjustment of the rigid tube 300, improving product production efficiency.

[0045] In some embodiments, to stably achieve the cooperation between the deformable part 420 and the protrusion 410 to correct and improve the coaxiality between the instrument tube 200 and the mounting groove 110, the axial length of the intermediate sleeve 400 can be set to be less than the axial length of the first connecting section 210. Based on the above structure, before the channel connector 100, the intermediate sleeve 400 and the instrument tube 200 are assembled in place, the stop surface 310 will cooperate with the step surface 120, causing the deformable part 420 to undergo axial compression and radial deformation to abut against the first connecting section 210. With the protrusion 410 as the fulcrum, the first connecting section 210 and the mounting groove 110 tend to be coaxial during the deformation process, so as to achieve stable coaxiality between the first connecting section 210 and the mounting groove 110 before the channel connector 100, the intermediate sleeve 400 and the instrument tube 200 are assembled in place, and eliminate the end face gap and step between the channel connector 100 and the instrument tube 200.

[0046] In some embodiments, the axial length of the intermediate sleeve 400 is less than the axial length of the mounting groove 110. Based on the above structure, when the channel connector 100, the intermediate sleeve 400 and the instrument tube 200 are assembled in place, there is a certain gap between the proximal end of the intermediate sleeve 400 and the proximal end face of the mounting groove 110. This gap can be used to accommodate adhesive, thereby increasing the effective bonding area between the channel connector 100, the intermediate sleeve 400 and the instrument tube 200, and improving the connection stability between the channel connector 100 and the instrument tube 200.

[0047] In some embodiments, to reduce the insertion resistance between the instrument tube 200 and the channel connector 100, the outer diameter of the intermediate sleeve 400 can be set to be equal to the inner diameter of the mounting groove 110. This allows the instrument tube 200 to have virtually no insertion resistance in the early stages of assembly. When the protrusion 410 is deformed by the compression of the peripheral wall of the first connecting section 210 and the inner wall of the mounting groove 110, the insertion resistance increases slightly. This also improves the coaxiality of the first connecting section 210 and the mounting groove 110. When the deformed part 420 undergoes compression deformation, it indicates that it is about to be inserted into place, and the insertion resistance increases further, prompting the first connecting section 210 and the mounting groove 110 to be coaxially aligned. Then, the operator focuses their attention on observing the proximal end face of the instrument tube 200 abutting against the proximal end face of the mounting groove 110. Finally, the connection between the instrument tube 200 and the channel connector 100 is glued and cured, which reduces the assembly difficulty and lowers the attention requirements of the operator.

[0048] In some embodiments, to facilitate observation of the end-to-end contact between the instrument tube 200 and the channel connector 100, the distal end of the channel connector 100 can be made transparent, allowing the operator to directly observe the end-to-end contact between the instrument tube 200 and the channel connector 100. Alternatively, a through hole 130 can be provided on the distal peripheral wall of the channel connector 100, which corresponds to and communicates with the proximal end of the mounting groove 110, allowing the operator to observe the end-to-end contact between the instrument tube 200 and the channel connector 100 through the through hole 130. Furthermore, adhesive can also be injected into the mounting groove 110 through the through hole 130 to bond and fix the mounting groove 110, the intermediate sleeve 400, and the first connecting section 210.

[0049] In some embodiments, to improve assembly convenience, at least two through holes 130 located on the same circumference can be provided on the distal peripheral wall of the channel connector 100. On the one hand, the end face contact status between the instrument tube 200 and the channel connector 100 can be determined by observing through multiple through holes 130, thereby improving the accuracy of observation. On the other hand, adhesive can be injected through one of the through holes 130, and the adhesive injection status can be observed through the other through hole 130, so as to ensure stable bonding between the instrument tube 200, the intermediate sleeve 400 and the mounting groove 110.

[0050] In some embodiments, to prevent the instrument tube 200 from collapsing due to bending in the area between the channel connector 100 and the insertion portion 20, a rigid tube 300 may be provided, including a curved section at the distal end. The rigid tube of the curved section provides deformation constraint protection for the instrument tube 200, preventing the instrument tube 200 from collapsing.

[0051] In some embodiments, in order to ensure stable coaxial assembly between the instrument tube 200 and the channel connector 100 during the assembly process, a relief groove or relief cavity 421 that causes the deformation part 420 to undergo radial deformation can be provided on the deformation part 420.

[0052] In some embodiments, the protrusion 410 may be configured as an annular structure, or the intermediate sleeve 400 may include a plurality of protrusions disposed on the same circumference, so as to constrain the coaxiality between the first connecting segment and the mounting groove at the corresponding position of the protrusion.

[0053] In some embodiments, after the instrument tube 200 is inserted into the mounting slot 110, such as Figure 13 As shown, a first cavity 600 is formed between the proximal end face of the mounting groove 110 and the proximal end face of the instrument tube 200. The first cavity 600 is connected to the through hole 130. A second cavity 700 is formed between the intermediate sleeve 400 and the first connecting section 210. The second cavity 700 is connected to the first cavity 600. Based on this structure, when applying adhesive through the through hole 130, the adhesive can flow into the second cavity 700 through the first cavity 600, further increasing the effective bonding area between the instrument tube 200, the intermediate sleeve 400 and the mounting groove 110, and improving the connection stability between the instrument tube 200 and the channel connector 100.

[0054] Example 2

[0055] This embodiment provides an endoscope, such as Figure 1 and Figure 2 As shown, the device includes a handle 10, an insertion part 20, and a channel assembly as described in Embodiment 1. The proximal end of the insertion part 20 is connected to the distal end of the handle 10. The channel connector 100 is disposed on the handle 10, and the rigid tube 300 is disposed inside the handle 10.

[0056] The endoscope provided in this application embodiment can be a nephroscope, or a bronchoscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral endoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc. This application embodiment does not specifically limit the type of endoscope.

[0057] Example 3

[0058] This embodiment provides an assembly method for the channel assembly as described in Embodiment 1 or the endoscope as described in Embodiment 2, including multiple assembly methods:

[0059] The first assembly method includes the following steps:

[0060] First, insert the intermediate sleeve 400 into the mounting groove 110, so that the deformable part 420 abuts against the stepped surface 120;

[0061] Then, insert the proximal end of the instrument tube 200, which is fitted with a rigid tube 300, into the intermediate tube 400 from the distal end of the intermediate tube 400.

[0062] The proximal end of the instrument tube 200 abuts against the proximal end wall of the mounting groove 110;

[0063] The instrument tube 200 and the channel connector 100 are glued and fixed.

[0064] The second assembly method includes the following steps:

[0065] First, insert the proximal end of the instrument tube 200, which is fitted with a rigid tube 300, into the intermediate sleeve 400 from the distal end of the intermediate sleeve 400, so that the deformable part 420 abuts against the stop surface 310.

[0066] Insert the first connecting section 210 of the instrument tube 200 and the intermediate sleeve 400 together into the mounting groove 110 until the proximal end of the instrument tube 200 abuts against the end face of the mounting groove 110.

[0067] The instrument tube 200 and the channel connector 100 are glued and fixed.

[0068] During assembly, the deformation part 420 of the intermediate sleeve 400 located between the first connecting section 210 and the mounting groove 110 is axially compressed by the fit between the stop surface 310, the deformation part 420, and the step surface 120. This causes the deformation part 420 to undergo radial deformation and come into contact with the instrument tube 200. At this time, the constraint of the protrusion 410 on the first connecting section 210 is used as a fulcrum. When the deformation part 420 deforms and comes into contact with the instrument tube 200, the posture of the first connecting section 210 in the mounting groove 110 is corrected, thereby improving the coaxiality of the first connecting section 210 and the mounting groove 110. This stabilizes and eliminates the end face gap and step between the channel connector 100 and the instrument tube 200.

[0069] In some embodiments, the rigid tube 300 and the instrument tube 200 can be glued and fixed before the instrument tube 200 is inserted into the intermediate sleeve 400.

[0070] In some embodiments, adhesive may be applied to the outer peripheral wall of the first connecting section 210 and the outer peripheral wall of the intermediate sleeve 400 before the proximal end of the instrument tube 200 and the proximal end wall of the mounting groove 110 are brought into contact.

[0071] In some embodiments, after the proximal end of the instrument tube 200 abuts against the inner wall of the mounting groove 110, adhesive can be injected through the through hole 130 on the distal peripheral wall of the channel connector 100 to bond and fix the instrument tube 200, intermediate sleeve 400 and mounting groove 110 together.

[0072] 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.

[0073] 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 channel assembly for use in an endoscope, characterized in that, include: A channel connector, wherein a mounting groove is provided at the distal end of the channel connector, and a stepped surface is provided at the distal end of the mounting groove; An instrument tube, the proximal end of which includes a first connecting segment and a second connecting segment, the first connecting segment being located at the proximal end of the second connecting segment, and a rigid tube being sleeved on the second connecting segment, the proximal end of which is provided with a stop surface; An intermediate sleeve has an inner diameter larger than the outer diameter of the first connecting section. The inner wall of the proximal end of the intermediate sleeve has a protrusion. The distance between the protrusion and the axis of the mounting groove is smaller than the outer diameter of the first connecting section. The distal end of the intermediate sleeve has a deformable part. The stop surface is used to mate with the stepped surface so that during the process of the instrument tube being inserted into the mounting groove, the deformable part of the intermediate sleeve located between the first connecting section and the mounting groove is axially compressed, so that the deformable part undergoes radial deformation and abuts against the instrument tube.

2. A channel assembly according to claim 1, characterized in that, The axial length of the intermediate sleeve is less than the axial length of the first connecting section.

3. A channel assembly according to claim 2, characterized in that, The axial length of the intermediate sleeve is less than the axial length of the mounting groove; And / or, the outer diameter of the intermediate sleeve is not less than the inner diameter of the mounting groove.

4. A channel assembly according to any one of claims 1 to 3, characterized in that, The distal peripheral wall of the channel connector is provided with a through hole, which is connected to the proximal end face of the mounting groove.

5. A channel assembly according to claim 4, characterized in that, The distal peripheral wall of the channel connector is provided with at least two through holes located on the same circumference.

6. A channel assembly according to any one of claims 1 to 3, characterized in that, The rigid tube includes a curved section located at the distal end.

7. A channel assembly according to any one of claims 1 to 3, characterized in that, The deformable part is provided with a relief groove or relief cavity to induce radial deformation of the deformable part.

8. An endoscope, characterized in that, The device includes a handle, an insertion part, and a channel assembly as described in any one of claims 1 to 7, wherein the proximal end of the insertion part is connected to the distal end of the handle, the channel connector is disposed on the handle, and the rigid tube is disposed inside the handle.

9. A method for assembling the channel assembly as described in any one of claims 1 to 7 or the endoscope as described in claim 8, characterized in that, Includes the following steps: The proximal end of the instrument tube fitted with a rigid tube is inserted into the intermediate tube from the distal end of the intermediate tube. The proximal end of the instrument tube abuts against the proximal end wall of the mounting slot; Secure the instrument tube and channel connector.

10. The assembly method according to claim 9, characterized in that, Before the instrument tube is inserted into the intermediate sleeve, the rigid tube and the instrument tube are glued and fixed. Alternatively, before abutting the proximal end of the instrument tube and the proximal end wall of the mounting groove, apply adhesive to the outer peripheral wall of the first connecting section and the outer peripheral wall of the intermediate sleeve. Alternatively, after the proximal end of the instrument tube abuts against the inner wall of the mounting slot, glue is injected through the through hole on the distal peripheral wall of the channel connector to bond and fix the instrument tube, intermediate sleeve, and mounting slot together.

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