Instrument channel assembly, three-way assembly, endoscope and instrument tube assembling method

Abstract

The invention provides an instrument channel assembly, a three-way assembly, an endoscope and an instrument tube assembling method, relates to the technical field of endoscopes, and solves the problem that an instrument is not smoothly inserted through the butt joint of instrument tubes. The instrument channel assembly based on the endoscope or the three-way assembly comprises a pipe joint, a cover plate and an instrument pipe, wherein the cover plate covers the pipe joint to form a mounting hole of a far port of an introduction channel of a near port connecting pipe joint; the near end of the instrument tube is arranged in the first mounting hole in a manner of covering the tube joint through a cover plate and is provided with a conical tube section, the conical tube section is positioned in the conical hole at the near end of the mounting hole and is matched with the conical hole, and a near port of the conical tube section is butted with a far port of the introduction channel. The conical pipe section at the near end of the instrument pipe can reduce the influence of the machining quality and the matching relation of the instrument pipe and the pipe joint on the matching quality of the butt joint position, the situation that matching steps or protrusions are generated on the butt joint position of the instrument pipe and the pipe joint from the near end face of the instrument pipe is prevented, and the passing smoothness of the instrument can be better guaranteed.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, and more specifically, to an instrument channel assembly, a three-way assembly, an endoscope, and an instrument tube assembly method. Background Technology

[0002] Endoscopes are configured with different functional channels to achieve their respective purposes. For example, some bronchoscopes and some nephroscopes are equipped with instrument channels, through which instruments are inserted to perform surgeries such as lithotripsy, stone removal, and biopsy.

[0003] Instrument channels typically consist of the internal channels of the mating instrument tube and the fitting. The instrument tube provides a channel of equal diameter, guiding the smooth movement of the instrument; it is relatively soft and has low-friction characteristics. The proximal end of the instrument tube is axially inserted into the distal socket of the fitting, and the mating is completed by axial contact and restraint with the stepped surface of the proximal end of the distal socket. Often, due to factors such as the machining quality of the instrument tube and socket, misalignment of the instrument tube and socket, or excessive force during insertion causing deformation of the proximal end of the instrument tube, the assembly quality at the mating point of the instrument tube and fitting is poor. This results in problems such as the instrument not being able to be smoothly inserted when passing through the mating point of the instrument tube and fitting. Summary of the Invention

[0004] The purpose of this invention is to design an instrument channel assembly, a three-way assembly, an endoscope, and an instrument tube assembly method to solve the problem of unsmooth insertion of instruments when passing through the junction of the instrument tube and the tube connector.

[0005] This invention is achieved through the following technical solution: An instrument channel assembly includes a connector, a cover plate, and an instrument tube. The connector has a circumferentially closed inlet channel and a first groove open at the top for placing the proximal end of the instrument tube. The cover plate covers the connector and has a third groove open at the bottom. The third groove mates with the first groove to form a first mounting hole whose proximal end connects to the distal end of the inlet channel. The proximal end of the first mounting hole forms a tapered hole that gradually narrows towards the distal end. The proximal end of the instrument tube is located in the first mounting hole. The proximal end of the instrument tube has a tapered tube segment whose diameter gradually decreases along its axis from the proximal end to the distal end. The tapered tube segment is located within and adapted to the tapered hole, and the proximal end of the tapered tube segment is connected to the distal end of the inlet channel.

[0006] The present invention also discloses a three-way assembly, the three-way assembly including a suction tube and the aforementioned instrument channel assembly; the tube connector of the instrument channel assembly is further provided with a circumferentially closed side branch channel that is laterally connected to the inlet channel in the tube connector and a second groove that is open on the top side; the cover plate of the instrument channel assembly is further provided with a fourth groove that is open on the bottom side, the fourth groove and the second groove being aligned to form a second mounting hole for the distal end to connect to the proximal end of the side branch channel; the distal end of the suction tube is located in the second mounting hole, and the distal end of the suction tube is connected to the proximal end of the second mounting hole.

[0007] The present invention also discloses an endoscope, which includes the aforementioned three-way assembly.

[0008] This invention also discloses an instrument tube assembly method, relating to the assembly of the instrument channel assembly, the three-way assembly, or the instrument tube in the endoscope described above; comprising the following steps: placing the instrument tube in a first groove, such that the tapered tube segment is located in the tapered hole groove provided at the proximal end of the first groove, and such that the proximal port of the tapered tube segment is aligned with the distal port of the inlet channel; covering the tube connector with a cover plate, such that the third groove is aligned with the first groove and pressed down to mate with the first groove to form a first mounting hole for clamping the instrument tube, and such that the tapered tube segment of the instrument tube is located in the tapered hole of the first mounting hole.

[0009] The present invention has the following advantages and beneficial effects: (1) A tapered tube section is provided at the proximal end of the instrument tube, which forms a flared structure at the proximal end of the instrument tube. This flared structure can be used to more easily receive instruments passing through this area and provide centered guidance for the instruments. After the instrument tube is connected to the distal port of the inlet channel of the pipe fitting through the tapered tube section, a tapered space with an expanding inner diameter and gradually decreasing diameter will be formed in the channel area between the distal port of the inlet channel and the distal port of the tapered tube section. This can reduce the influence of the processing quality and fit relationship of the instrument tube and the pipe fitting on the fit quality at the connection point to a certain extent. It can effectively prevent the production of a fit step or protrusion facing the proximal side and intruding into the channel of the instrument tube at the connection point of the instrument tube and the pipe fitting. It can better ensure that the instrument will not collide with the proximal end face of the instrument tube, thereby ensuring the smooth passage of the instrument.

[0010] (2) In addition to providing an inlet channel for docking with the proximal end of the instrument tube, the tube connector also provides a first groove. The first groove extends from the distal end of the inlet channel to the distal end of the instrument channel assembly. In this way, the proximal end of the instrument tube can be pre-positioned in the first groove before the cover plate is closed. By closing the cover plate, the instrument tube is restricted in the first mounting hole to complete the docking with the tube connector. This not only allows the instrument tube with a tapered tube section at the proximal end to be installed on the tube connector conveniently and quickly, but also avoids the situation where the proximal end of the instrument tube is squeezed and deformed due to the insertion method. This can better ensure the docking quality between the tip of the proximal end of the instrument tube and the tube connector at the distal end of the inlet channel, thereby ensuring the smooth passage of the instrument.

[0011] (3) Both the instrument tube and the suction tube can be installed in one step by covering the tube connector with a cover plate to form a three-way assembly, which simplifies the installation steps. The distal end of the suction tube and the proximal end of the instrument tube can be pre-positioned in the second groove and the first groove, respectively, before the cover plate is closed. By covering the cover plate, the suction tube and the instrument tube are restricted in the second mounting hole and the first mounting hole to complete the connection with the tube connector. This can avoid insertion deformation at the proximal end of the instrument tube and the distal end of the suction tube, which would affect the smoothness of suction. Attached Figure Description

[0012] 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.

[0013] Figure 1 A schematic diagram of the external structure of the endoscope of the present invention is shown; Figure 2 A schematic diagram of the internal structure of the endoscope of the present invention is shown; Figure 3 yes Figure 2 A magnified schematic diagram of part A in the middle; Figure 4 It shows Figure 3 The diagram shown further omits the cover plate. Figure 5 It shows Figure 4 The structure shown further eliminates the need for instrument tubes and suction tubes; Figure 6 A partial exploded view of the tee assembly is shown; Figure 7 Schematic diagrams of the pipe fittings in some embodiments are shown; Figure 8 It shows the use of Figure 7 A half-sectional view of the tee assembly of the central pipe joint.

[0014] The diagram is marked as follows: 10. Instrument access assembly; 11. Pipe fitting; 11a. Pipe body; 11b. Platform; 111. Inlet channel; 112. First groove; 113. First stepped surface; 114. First brim; 115. Side branch channel; 116. Second groove; 117. Second stepped surface; 118. Second brim; 12. Cover plate; 121. Third groove; 122. Fourth groove; 123. Injection hole; 13. First mounting hole; 14. Instrument tube; 141. Conical tube segment; 15. Second mounting hole; 16. Tapered groove; 20. Suction tube; 100. Tee assembly; 200. Endoscope; 210. Housing; 220. Support frame; 230. Rope groove. Detailed Implementation

[0015] 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.

[0016] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "tip," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0017] 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.

[0018] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0019] 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".

[0020] This invention discloses an instrument channel assembly, a three-way assembly based on the instrument channel assembly, an endoscope using the instrument channel assembly or the three-way assembly, and an assembly method for the instrument tube in the instrument channel assembly, the three-way assembly, or the endoscope. In this invention, the instrument tube is installed using a capping method and complemented by a flared structure at the proximal end of the instrument tube, which can, to a certain extent, ensure the installation quality of the instrument tube and the connector, and reduce or avoid structures that obstruct the passage of instruments.

[0021] The following is in conjunction with the appendix Figures 1 to 8 The instrument channel assembly, three-way assembly, endoscope, and instrument tube assembly method provided in this application are described in detail through specific embodiments and application scenarios.

[0022] On one hand, the present invention provides an instrument channel assembly 10, with reference to Figure 2 - Figure 8 As shown, it is specifically configured with the following structure: The instrument channel assembly 10 in this embodiment includes a pipe connector 11, a cover plate 12, and an instrument tube 14. The pipe connector 11 and the cover plate 12 are connected to fix the instrument tube 14 on the pipe connector 11 by covering it.

[0023] like Figure 7As shown, the tube connector 11 includes a tube body 11a and a platform 11b integrally fixedly connected to the tube body 11a. The proximal end of the tube body 11a is configured as an instrument nozzle. An inlet channel 111, which passes through the tube body 11a, is provided inside the tube body 11a. The inlet channel 111 is circumferentially closed, and its proximal end is located at the instrument nozzle. A first groove 112 is provided on the top surface of the platform 11b. The first groove 112 is used to place the proximal end of the instrument tube 14, defining the arrangement path of the proximal end of the instrument tube 14. The top side of the first groove 112 is open to receive the bottom of the instrument tube 14. The first groove 112 is a circular groove with a central angle less than or equal to 180°, and the diameter of the first groove 112 is close to the outer diameter of the instrument tube 14, such that the proximal end of the instrument tube 14... Figure 4 As shown, once placed in the first groove 112, its left and right movement can be stably restricted.

[0024] like Figure 4 and Figure 6 As shown, the instrument tube 14 extends axially and has a proximal port and a distal port. The proximal end of the instrument tube 14 is provided with a tapered tube section 141. The diameter of the tapered tube section 141 gradually decreases from the proximal port to the distal end along the axis of the instrument tube 14, so that the instrument tube 14 forms a flared structure at the proximal end relative to the straight tube structure in its middle section and distal end.

[0025] like Figure 6 As shown, the cover plate 12 matches the shape of the platform 11b of the pipe connector 11 and can be fixed to the pipe connector 11 by bolts or post fitting. A third groove 121 is provided on the bottom surface of the cover plate 12, and the bottom side of the third groove 121 is open to receive the top of the instrument tube 14. Figure 8 As shown, after the cover plate 12 and the pipe connector 11 are closed, the third groove 121 on the cover plate 12 and the first groove 112 on the pipe connector 11 can be matched to form a circumferentially closed first mounting hole 13. The proximal end of the first mounting hole 13 is connected to the distal end of the inlet channel 111. The inner diameter of the first mounting hole 13 is approximately matched with the outer diameter of the instrument tube 14, so that the proximal end of the instrument tube 14 is located in the first mounting hole 13 and will not move arbitrarily.

[0026] like Figure 8 As shown, the proximal end of the first mounting hole 13 has a tapered hole that gradually narrows from its proximal end to its distal end. Since the first mounting hole 13 is composed of a first groove 112 and a third groove 121, it can be referenced... Figure 6 - Figure 8 As shown, half of the tapered hole groove 16 is formed at the proximal end of the first groove 112 and the proximal end of the third groove 121.

[0027] like Figure 3 and Figure 8As shown, after the instrument channel assembly 10 is assembled, the proximal end of the instrument tube 14 is covered by the cover plate 12 and the platform 11b of the connector 11 to be installed in the first mounting hole 13. The tapered tube segment 141 at the proximal end of the instrument tube 14 is located in and adapted to the tapered hole at the proximal end of the first mounting hole 13. The proximal port of the tapered tube segment 141 is aligned with the distal port of the inlet channel 111 so that the instrument can smoothly enter the tapered tube segment 141 at the proximal end of the instrument tube 14 after exiting from the distal port of the inlet channel 111.

[0028] In this embodiment, the proximal end of the instrument tube 14 is provided with a tapered section 141 that gradually narrows from its proximal port. This creates a flared structure at the proximal end of the instrument tube 14. This flared structure can be used to more easily receive instruments exiting from the inlet channel 111 of the connector 11 and passing through it in parallel, and to provide centered guidance for the instruments, allowing them to smoothly enter the instrument tube 14. (Reference) Figure 8 As shown, after the instrument tube 14 is connected to the distal end of the inlet channel 111 of the pipe connector 11 via the tapered tube section 141, a tapered space will be formed in the channel area between the distal end of the inlet channel 111 and the distal end of the tapered tube section 141. The tapered space is larger in diameter than the straight tube channel area on the distal end side and gradually narrows towards the distal end side. The existence of this tapered space can reduce the influence of the processing quality and fit relationship between the instrument tube 14 and the pipe connector 11 on the fit quality at the connection point to a certain extent. It can effectively prevent the formation of a fit step or protrusion facing the proximal end side and intruding into the channel of the instrument tube 14 at the connection point between the instrument tube 14 and the pipe connector 11. It can better ensure that the instrument will not collide with the proximal end face of the instrument tube 14, thereby ensuring the smooth passage of the instrument.

[0029] In this embodiment, in addition to providing an inlet channel 111 for docking with the proximal end of the instrument tube 14, the tube connector 11 also provides a first groove 112. The first groove 112 extends from the distal end of the inlet channel 111 to the distal end of the instrument channel assembly 10. In this way, the proximal end of the instrument tube 14 can be pre-positioned in the first groove 112 before the cover plate 12 is closed. By closing the cover plate, the instrument tube 14 is restricted in the first mounting hole 13 to complete the docking with the tube connector 11. This not only allows the instrument tube 14 with a tapered tube section 141 at the proximal end to be easily and quickly installed on the tube connector 11, but also avoids the situation where the proximal end of the instrument tube 14 is squeezed and deformed due to the insertion method. This can better ensure the docking quality between the proximal tip of the instrument tube 14 and the tube connector 11 at the distal end of the inlet channel 111, thereby ensuring the smooth passage of the instrument.

[0030] In this embodiment, the tapered tube section 141 of the instrument tube 14, after being connected with the tapered hole formed by the cover plate 12 and the pipe joint 11, can also play a certain role in preventing axial dislodgement and preventing the instrument tube 14 from loosening.

[0031] According to some optional embodiments, such as Figure 8 As shown, the near end of a first groove 112 on the top surface of the platform 11b of the pipe connector 11 is coaxially connected to the far end of an inlet channel 111 within the pipe body 11a. The near end of the first groove 112 is configured as a tapered groove 16, the radius of which is larger than the radius of the far end of the inlet channel 111. This results in a first stepped surface 113 forming around the axis of the inlet channel 111 on the end face of the pipe body 11a between the near end of the tapered groove 16 and the far end of the inlet channel 111. (Reference) Figure 4 and Figure 8 After the instrument tube 14 is placed in the first groove 112, the tapered tube segment 141 at the proximal end of the instrument tube 14 will be located in the matching tapered hole groove 16 at the proximal end of the first groove 112. The proximal end face of the tapered tube segment 141 axially abuts against the first step surface 113, which restricts the axial position of the instrument tube 14. This ensures that the instrument tube 14 can be in the correct installation position after being installed on the platform 11b of the pipe connector 11 before the cover plate 12, thus ensuring good assembly quality with the pipe connector 11, facilitating the subsequent installation of the cover plate 12 and providing good sealing quality.

[0032] According to some optional embodiments, such as Figure 7 As shown, a first brim 114 extending distally is provided on the end face of the tube body 11a of the tube connector 11. The first brim 114 is located outside the first step surface 113. The first brim 114 and the groove wall of the first groove 112 are arranged radially opposite each other, so that a limiting space is formed between the first brim 114 and the groove wall of the first groove 112 for clamping or radially limiting the proximal tip of the instrument tube 14.

[0033] For example, the first brim 114 is a columnar protrusion.

[0034] For example, such as Figure 7 As shown, the first brim 114 is an arc-shaped plate-like protrusion extending circumferentially around the axis of the inlet channel 111. The two ends of the first brim 114 in the circumferential direction are respectively connected to the top side surface of the platform 11b, so that the first brim 114 provided on the outside of the first step surface 113 of the pipe connector 11 forms a socket hole with a larger inner diameter on the far end side of the inlet channel 111, which is composed of the groove wall of the first groove 112 and the inner side wall of the first brim 114. The socket hole can provide better radial restraint on the tapered tube section 141 of the receiving instrument tube 14 through the proximal end of the tapered tube section 141, so as to effectively prevent the instrument tube 14 from falling off when the cover plate 12 is closed.

[0035] like Figure 8As shown, after the instrument tube 14 is assembled with the pipe connector 11 and the cover plate 12, the first cap 114 extends distally to the proximal outer wall of the tapered tube section 141 of the instrument tube 14, and works with the groove wall of the first groove 112 to radially limit the proximal tip of the instrument tube 14.

[0036] In some embodiments, the radial distance between the inner wall of the first brim 114 and the groove wall of the first groove 112 is equal to or slightly greater than the outer diameter near the port of the tapered section 141 of the instrument tube 14, such that a radial seal is formed at the point where the proximal periphery of the tapered section 141 contacts the inner wall of the first brim 114 and the groove wall of the first groove 112. This radial seal effectively prevents adhesive from flowing from the outer wall of the tapered section 141 to the port of the tapered section 141, thus preventing the formation of adhesive blocks that would obstruct the passage of the instrument. Preferably, the first brim 114 is an arc-shaped plate-like protrusion extending circumferentially around the axis of the inlet channel 111. The two ends of the first brim 114 in the circumferential direction are respectively connected to the top surface of the platform 11b, so that the first brim 114, located outside the first step surface 113, forms a socket with a larger inner diameter at the distal end of the inlet channel 111, which is formed by the groove wall of the first groove 112 and the inner wall of the first brim 114. In this embodiment, the existence of the socket allows the proximal end of the instrument tube 14 to have an insertion process when installed on the platform 11b of the pipe connector 11. However, the socket only extends to the proximal tip of the instrument tube 14, making the insertion path of the tapered tube segment 141 at the proximal end of the instrument tube 14 shorter. This, in turn, makes the deformation of the proximal end of the tapered tube segment 141 of the instrument tube 14 controllable and easy to recover.

[0037] According to some optional embodiments, such as Figure 3 and Figure 8 As shown, the cover plate 12 is provided with an injection hole 123 extending from the top side surface to the bottom side surface, and the injection hole 123 points to the outer wall of the tapered tube section 141. In this embodiment, the injection hole 123 on the cover plate 12 points to the outer wall of the tapered tube section 141 of the instrument tube 14. The injected glue can avoid direct radial impact on the distal end of the tapered tube section 141 of the instrument tube 14, prevent the formation of protrusions that could affect the passage of the instrument, and ensure the smooth passage of the instrument through the instrument tube 14.

[0038] According to some optional embodiments, such as Figure 8 As shown, the aperture at the proximal port of the tapered tube segment 141 at the proximal end of the instrument tube 14 is greater than or equal to the aperture at the distal port of the inlet channel 111, so that after the proximal end face of the tapered tube segment 141 abuts against the first step surface 113, no radially protruding part will be generated on the distal side of the inlet channel 111 to affect the passage of the instrument.

[0039] According to some optional embodiments, such as Figure 8As shown, the near port of the tapered pipe section 141 is coaxially connected to the far port of the inlet channel 111.

[0040] Secondly, based on the above embodiments, the present invention provides a three-way component 100, such as... Figure 2 - Figure 8 As shown, the three-way assembly 100 includes the aforementioned instrument channel assembly 10 and suction tube 20.

[0041] The instrument channel assembly 10 includes a pipe connector 11, a cover plate 12, and an instrument tube 14. The pipe connector 11 and the cover plate 12 are connected to fix the instrument tube 14 on the pipe connector 11 by covering it.

[0042] like Figure 7 As shown, in addition to the inlet channel 111, the tube body 11a of the connector 11 also has a side branch channel 115 that is laterally connected to the inlet channel 111. The side branch channel 115 is a circumferentially closed through hole, so that the tube body 11a constitutes a three-way tube with an instrument nozzle. In addition to the first groove 112, the top surface of the platform 11b of the connector 11 also has a second groove 116 that is open at the top. The distal end of the second groove 116 connects to the proximal end of the side branch channel 115, and the second groove 116 is used to receive the top of the suction tube 20.

[0043] like Figure 6 As shown, in addition to the third groove 121, the bottom surface of the cover plate 12 of the instrument channel assembly 10 also has a fourth groove 122 with an open bottom side. The fourth groove 122 is used to receive the bottom of the suction tube 20. The cover plate 12 matches the shape of the platform 11b of the tube connector 11 and can be fixed to the tube connector 11 by bolts or post fitting. After the cover plate 12 is fitted onto the platform 11b of the tube connector 11, the fourth groove 122 on the cover plate 12 and the second groove 116 on the platform 11b of the tube connector 11 mate to form a circumferentially closed second mounting hole 15. The distal end of the second mounting hole 15 is coaxially connected to the proximal end of the side branch channel 115. The distal end of the suction tube 20 is located in the second mounting hole 15, and the distal end of the suction tube 20 is connected to the proximal end of the side branch channel 115.

[0044] The inner diameter of the second mounting hole 15 is approximately matched with the outer diameter of the suction tube 20, so that the distal end of the suction tube 20 will not move arbitrarily in the first mounting hole 13.

[0045] In this embodiment, both the instrument tube 14 and the suction tube 20 can be installed in one step by covering the tube connector 11 with the cover plate 12, forming a three-way assembly 100, which simplifies the installation steps. The distal end of the suction tube 20 and the proximal end of the instrument tube 14 can be pre-positioned in the second groove 116 and the first groove 112, respectively, before the cover plate 12 is covered. By covering the tubes, the suction tube 20 and the instrument tube 14 are confined in the second mounting hole 15 and the first mounting hole 13 to complete the connection with the tube connector 11. This avoids insertion deformation at the proximal end of the instrument tube 14 and the distal end of the suction tube 20, which would affect the smoothness of suction.

[0046] According to some optional embodiments, such as Figure 7 As shown, the second groove 116 on the platform 11b of the pipe connector 11 is coaxially arranged with the side branch channel 115 inside the pipe body 11a. Simultaneously, the radius of the second groove 116 is larger than the radius of the side branch channel 115, resulting in a second stepped surface 117 extending around the axis of the side branch channel 115 on the end face of the pipe connector 11 between the distal end of the second groove 116 and the proximal end of the side branch channel 115. For example... Figure 8 As shown, after the cover plate 12 is placed on the platform 11b of the pipe joint 11, the distal end of the suction pipe 20 can be axially abutted against the second step surface 117 and axially limited.

[0047] According to some optional embodiments, such as Figure 7 and Figure 8 As shown, the pipe connector 11 has a second brim 118 extending towards the proximal end of the side branch channel 115 on the end face of the second stepped surface 117, and the second brim 118 is located outside the second stepped surface 117. Figure 8 As shown, after the cover plate 12 is placed on the platform 11b of the pipe joint 11, the second brim 118 extends to the periphery of the distal tip of the suction tube 20, and the periphery of the distal tip of the suction tube 20 radially contacts the inner wall of the second brim 118 and the groove wall of the second groove 116 to form a radial seal.

[0048] For example, the second brim 118 is a columnar protrusion.

[0049] For example, such as Figure 7 As shown, the second brim 118 is an arc-shaped plate-like protrusion extending circumferentially around the axis of the side branch channel 115. The two ends of the second brim 118 in the circumferential direction are respectively connected to the top side surface of the platform 11b, so that the second brim 118 provided on the outside of the second step surface 117 of the pipe joint 11 forms a socket hole with a larger inner diameter on the proximal side of the side branch channel 115, which is formed by the groove wall of the second groove 116 and the inner side wall of the second brim 118. The socket hole can receive the distal end of the suction tube 20 to provide better radial restraint, so as to effectively prevent the suction tube 20 from falling off when the cover plate 12 is closed.

[0050] In this embodiment, the second cap 118 provided on the outer side of the second step surface 117 of the pipe connector 11 can form a second socket hole with a larger inner diameter on the proximal side of the side branch channel 115, which is formed by the groove wall of the second groove 116 and the inner side wall of the second cap 118. The second socket hole can provide radial restraint on the suction tube 20 by receiving the distal end of the suction tube 20, so as to prevent the suction tube 20 from falling off when the cover plate 12 is closed. It can also effectively prevent glue from flowing from the outer wall of the suction tube 20 to the distal port of the suction tube 20 through the radial sealing part formed between the second socket hole and the peripheral edge of the distal end of the suction tube 20, forming a glue block that would hinder the smoothness of suction.

[0051] Thirdly, the present invention provides an endoscope 200, which, as... Figure 1 and Figure 2 As shown, the endoscope 200 includes a housing 210 and a three-way assembly 100 of any of the above embodiments installed in the housing 210. The endoscope 200 also includes a negative pressure suction valve connected to the proximal end of the suction tube 20 in the three-way assembly 100, and the negative pressure suction valve is installed in the housing 210.

[0052] According to some optional embodiments, the portion of the pipe body 11a of the connector 11 in the three-way assembly 100 where the instrument nozzle is located is fitted into the instrument nozzle mounting hole of the housing 210, while the platform 11b is placed on the top surface of the support frame 220 provided on the housing 210. The top of the support frame 220 is provided with a rope groove 230 for guiding the traction rope. After the platform 11b is placed on the top surface of the housing 210, it can close the open top side of the rope groove 230, preventing the traction rope from coming out of the rope groove 230.

[0053] For example, the platform 11b of the pipe connector 11 can be fixed with bolts after being placed on the top surface of the support frame 220.

[0054] Fourthly, the present invention provides an instrument tube assembly method, which relates to the assembly of the instrument channel assembly 10 in any of the above embodiments, the three-way assembly 100 in any of the above embodiments, or the instrument tube 14 in the endoscope 200 in any of the above embodiments.

[0055] The instrument tube assembly method includes the following steps: Step S1: Place the proximal end of the instrument tube 14 in the first groove 112 provided on the platform 11b of the tube connector 11, while ensuring that the tapered tube segment 141 provided on the proximal end of the instrument tube 14 is in the tapered hole groove 16 at the proximal end of the first groove 112, and align the proximal port of the tapered tube segment 141 with the distal port of the inlet channel 111.

[0056] Step S2: After aligning the third groove 121 on the cover plate 12 with the first groove 112 on the platform 11b, press the cover plate 12 down to cover the pipe connector 11, so that the third groove 121 and the first groove 112 align to form the first mounting hole 13 for clamping the instrument tube 14, ensuring that the tapered tube section 141 of the instrument tube 14 is located in the tapered hole of the first mounting hole 13.

[0057] According to some optional embodiments, prior to step S1, adhesive is applied to the wall of the first groove 112 provided on the platform 11b of the pipe connector 11, and simultaneously, adhesive is applied to the wall of the third groove 121 provided on the cover plate 12.

[0058] According to some alternative embodiments, step S3 is also included: after the cover plate 12 is fitted onto the pipe connector 11, adhesive is injected into the first mounting hole 13 through the adhesive injection hole 123 provided on the cover plate 12. The adhesive may be UV adhesive, etc.

[0059] The endoscopes involved in the embodiments of this application may be bronchoscopes, pyeloscopes, esophagoscopes, gastroscopes, colonoscopes, otoscopes, rhinoscopes, oral endoscopes, laryngoscopes, colposcopes, laparoscopes, arthroscopes, etc. The embodiments of this application do not specifically limit the types of endoscopes.

[0060] 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.

[0061] 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.

[0062] 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. An instrument channel assembly, characterized in that: include: Instrument tube (14), the proximal end of which is provided with a tapered tube section (141) whose diameter gradually decreases from the proximal port to the distal end along its axis. The tube connector (11) is provided with a circumferentially closed inlet channel (111) and a first groove (112) that is open on the top side to accommodate the proximal end of the instrument tube (14). A cover plate (12) covers the pipe joint (11). The cover plate (12) is provided with a third groove (121) with an open bottom side. The third groove (121) and the first groove (112) are engaged to form a first mounting hole (13) that connects the near end to the far end of the inlet channel (111). The near end of the first mounting hole (13) forms a tapered hole that gradually narrows towards the far end from its near end. The proximal end of the instrument tube (14) is located in the first mounting hole (13), the tapered tube segment (141) is located in and adapted to the tapered hole, and the proximal port of the tapered tube segment (141) is connected to the distal port of the inlet channel (111).

2. The instrument channel assembly according to claim 1, characterized in that: The pipe connector (11) includes a pipe body (11a) and a platform (11b) fixedly connected to the pipe body (11a). The pipe body (11a) is provided with an inlet channel (111) through which it passes, and the platform (11b) is provided with the first groove (112) on its surface.

3. The instrument channel assembly according to claim 1, characterized in that: The near end of the first groove (112) is coaxially connected to the far end of the inlet channel (111), and the radius of the near end of the first groove (112) is greater than the radius of the far end of the inlet channel (111), such that the pipe joint (11) forms a first stepped surface (113) around the axis of the inlet channel (111) between the near end of the first groove (112) and the far end of the inlet channel (111), and the near end face of the tapered pipe section (141) axially abuts against the first stepped surface (113).

4. The instrument channel assembly according to claim 3, characterized in that: The pipe joint (11) is provided with a first cap (114) extending distally to the periphery of the near end of the tapered pipe section (141) on the outer side of the first step surface (113). The first cap (114) and the groove wall of the first groove (112) are arranged opposite each other in the radial direction. The outer wall of the near end of the tapered pipe section (141) is in radial contact with the inner wall of the first cap (114) and the groove wall of the first groove (112) to form a radial seal.

5. The instrument channel assembly according to claim 1, characterized in that: The cover plate (12) is provided with an injection hole (123), which points to the outer wall of the tapered pipe section (141).

6. The instrument channel assembly according to claim 1, characterized in that: The aperture at the near end of the tapered tube segment (141) is greater than or equal to the aperture at the far end of the inlet channel (111). And / or, the near port of the tapered tube segment (141) is coaxially connected to the far port of the inlet channel (111).

7. A tee assembly, characterized in that: Includes a suction tube (20) and a medical device channel assembly (10) as described in any one of claims 1-6; The pipe joint (11) of the instrument channel assembly (10) is also provided with a circumferentially closed side branch channel (115) that is laterally connected to the inlet channel (111) inside the pipe joint (11) and a second groove (116) that is open on the top side. The cover plate (12) of the instrument channel assembly (10) is also provided with a fourth groove (122) with the bottom side open. The fourth groove (122) and the second groove (116) are engaged to form a second mounting hole (15) for the far port to connect to the near port of the side branch channel (115). The distal end of the suction tube (20) is located in the second mounting hole (15), and the distal port of the suction tube (20) is connected to the proximal port of the side branch channel (115).

8. A tee assembly according to claim 7, characterized in that: The second groove (116) is coaxially arranged with the side branch channel (115), and the radius of the second groove (116) is larger than the radius of the side branch channel (115), so that the pipe joint (11) forms a second stepped surface (117) around the axis of the side branch channel (115) between the far end of the second groove (116) and the near end of the side branch channel (115), and the far end of the suction tube (20) axially abuts against the second stepped surface (117). The pipe joint (11) is provided with a second brim (118) extending proximally to the periphery of the distal tip of the suction tube (20) on the outer side of the second step surface (117). The periphery of the distal tip of the suction tube (20) forms a radial seal by radially contacting the inner wall of the second brim (118) and the groove wall of the second groove (116).

9. An endoscope, characterized in that: Includes the tee assembly (100) as described in claim 7 or 8.

10. A method for assembling an instrument tube, characterized in that: The assembly of the instrument channel assembly (10) according to any one of claims 1-6, or the three-way assembly (100) according to claim 7 or 8, or the instrument tube (14) in the endoscope (200) according to claim 9; Includes the following steps: Place the instrument tube (14) in the first groove (112), so that the tapered tube segment (141) is in the tapered hole groove (16) provided at the proximal end of the first groove (112), and make the proximal port of the tapered tube segment (141) connect to the distal port of the inlet channel (111); Cover the pipe fitting (11) with the cover plate (12) and press down the third groove (121) to align with the first groove (112) to form the first mounting hole (13) for clamping the instrument tube (14), and place the tapered section (141) of the instrument tube (14) in the tapered hole of the first mounting hole (13).

Images