Endoscope channel assembly and assembly method therefor

Abstract

The present application belongs to the technical field of medical instruments, and specifically relates to an endoscope channel assembly and an assembly method therefor. The assembly method for the endoscope channel assembly comprises: disposing a mandrel to pass through a joint between a multi-way structure and an instrument tube, such that a joint between a first hole channel in the multi-way structure and a second hole channel in the instrument tube is smooth; fixing the multi-way structure and the instrument tube; and pulling out the mandrel from the multi-way structure and the instrument tube. When the assembly method of the present application is used to assemble the endoscope channel assembly, the mandrel is disposed to pass through the joint between the multi-way structure and the instrument tube. At this time, the mandrel simultaneously passes through the first hole channel of the multi-way structure and the second hole channel of the instrument tube, which makes the joint between the first hole channel and the second hole channel smooth. In this way, the formation of a step at the joint between the first hole channel and the second hole channel can be prevented, and in the process of threading a guide wire in a retrograde direction or threading a surgical instrument in an antegrade direction, the joint will not hinder the process, thereby solving the problem of difficulty in threading the guide wire in a retrograde direction or threading the surgical instrument in an antegrade direction.

Description

Endoscope channel assembly and method of assembling the same TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to an endoscope channel assembly and a method of assembling the same. BACKGROUND

[0002] An endoscope is a commonly used medical device, which is an inspection device capable of directly entering a natural duct of a human body, and can provide sufficient diagnostic information for a doctor to treat a disease. The endoscope comprises a device tube arranged in an insertion part, and a proximal end of the device tube is connected to a multi-pass structure on a handle.

[0003] Generally, there is an operation of arranging a medical tool into the multi-pass structure when using the endoscope. However, in practice, it is difficult to arrange the medical tool into the multi-pass structure. SUMMARY

[0004] The purpose of the present application is to provide an endoscope channel assembly and a method of assembling the same, which can solve the problem that it is difficult to arrange a medical tool into a multi-pass structure.

[0005] In order to solve the above technical problem, the present application is implemented as follows:

[0006] In a first aspect, the present application provides a method of assembling an endoscope channel assembly, comprising:

[0007] arranging a core rod at a joint of the multi-pass structure and the device tube, so that a joint of a first channel in the multi-pass structure and a second channel in the device tube is smooth;

[0008] fixing the multi-pass structure and the device tube;

[0009] pulling out the core rod from the multi-pass structure and the device tube.

[0010] In a second aspect, the present application provides an endoscope channel assembly, which is assembled by the above-mentioned method.

[0011] The beneficial technical effects of the present application are as follows:

[0012] When the endoscope channel assembly is assembled by the method of the present application, the core rod is arranged at the joint of the multi-pass structure and the device tube. At this time, the core rod is arranged in the first channel of the multi-pass structure and the second channel of the device tube. The first channel and the second channel tend to be coaxial through the core rod, so that the first channel and the second channel have a relatively optimal coaxiality, thereby making the joint of the first channel and the second channel smooth. In this way, a step can be prevented from being formed at the joint of the first channel and the second channel. Therefore, the joint does not hinder the process of reverse threading of a guide wire or normal threading of a surgical instrument, so as to solve the problems of difficulty in reverse threading of the guide wire or normal threading of the surgical instrument. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a flow diagram of the assembly method disclosed in the embodiments of the present application;

[0014] Fig. 2 is a flow diagram of the assembly method disclosed in another embodiment of the present application;

[0015] Fig. 3 is a structural diagram of the endoscope channel assembly disclosed in the embodiments of the present application;

[0016] Fig. 4 is a cross-sectional view of the endoscope channel assembly disclosed in the embodiments of the present application;

[0017] Fig. 5 is an enlarged diagram of A in Fig. 4 of the present application;

[0018] Fig. 6 is a cross-sectional view of the endoscope channel assembly after being combined with the mandrel disclosed in the embodiments of the present application;

[0019] Fig. 7 is an enlarged diagram of B in Fig. 6 of the present application.

[0020] Explanation of Reference Signs:

[0021] 100, multi-channel structure; 110, first channel; 111, first hole section; 120, first stepped hole; 200, instrument tube; 210, second channel; 211, second hole section; 300, mandrel. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely in the embodiments of the present application in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a category, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0024] The endoscope channel assembly and the assembly method thereof provided in the embodiments of the present application will be described in detail in combination with the drawings and specific embodiments and their application scenarios.

[0025] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative positions of the endoscope and its components in the use environment relative to the user, wherein the end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0026] The current medical tools include guide wires and surgical instruments, and the operations of the medical tools include reverse threading of the guide wires and forward threading of the surgical instruments. The reverse threading of the guide wires is to sequentially thread the proximal end of the guide wire out of the instrument tube and the multi-pass structure, and to insert the endoscope into the target position by using the guide wire. The operation process of the reverse threading of the guide wires is as follows: inserting a hard mirror into the human body; introducing the guide wire into the human body through the hard mirror; withdrawing the hard mirror from the human body; directly introducing the endoscope into the human body through the guide wire, and in this process, the operation of the reverse threading of the guide wires exists. The forward threading of the surgical instruments is to sequentially thread the distal end of the surgical instrument out of the multi-pass structure and the instrument tube, and to perform a treatment operation by using the surgical instrument.

[0027] The current multi-pass structure has a first channel and a stepped hole connected therein, the stepped hole is located at the distal side of the first channel, and the instrument tube has a second channel formed therein. The proximal end of the instrument tube is inserted into the stepped hole to complete the butt joint between the instrument tube and the multi-pass structure. The instrument tube and the stepped hole are in clearance fit, that is, there is a gap between the instrument tube and the stepped hole after the instrument tube is inserted into the stepped hole. The gap can accommodate the glue liquid, so as to fix the instrument tube and the multi-pass structure.

[0028] The inventor further found that because there is a gap between the instrument tube and the stepped hole, the stepped hole has a space for the radial movement of the instrument tube, and there will be an installation error in the process of butt joint of the instrument tube and the multi-pass structure, which will make the instrument tube deviate from the preset position, resulting in poor coaxiality between the distal end of the multi-pass structure and the proximal end of the instrument tube, so that the orifice edge of the distal end of the first channel and the orifice edge of the proximal end of the second channel are misaligned to form a step at the joint therebetween. In the process of threading the guide wire or the surgical instrument, the guide wire or the surgical instrument is easy to abut against the step, thereby causing difficulty in reverse threading of the guide wire or forward threading of the surgical instrument.

[0029] As shown in FIGS. 1 to 7, the present application discloses an assembly method of an endoscope channel assembly, comprising:

[0030] S100, threading a mandrel 300 at the joint of the multi-pass structure 100 and the instrument tube 200, so that the joint of the first channel 110 in the multi-pass structure 100 and the second channel 210 in the instrument tube 200 is smooth.

[0031] The core rod 300 can be inserted into the joint between the multi-pass structure 100 and the instrument tube 200 in several ways. First, the distal end of the multi-pass structure 100 is connected to the proximal end of the instrument tube 200, and then the core rod 300 is inserted into the joint between the two. Second, the core rod 300 is inserted into the multi-pass structure 100, and the core rod 300 is inserted into the joint between the multi-pass structure 100 and the instrument tube 200, and then the instrument tube 200 is connected to the multi-pass structure 100, so that the core rod 300 is inserted into the joint between the multi-pass structure 100 and the instrument tube 200. Third, the core rod 300 is inserted into the instrument tube 200, and the core rod 300 is inserted into the joint between the multi-pass structure 100 and the instrument tube 200, and then the distal end of the multi-pass structure 100 is connected to the proximal end of the instrument tube 200, so that the core rod 300 is inserted into the joint between the multi-pass structure 100 and the instrument tube 200. The order of inserting the core rod 300 into the joint between the multi-pass structure 100 and the instrument tube 200 is not limited in the present application.

[0032] Optionally, the distal end of the multi-pass structure 100 is connected to the proximal end of the instrument tube 200 in two ways. First, referring to FIGS. 4 and 5, the proximal end of the instrument tube 200 is connected to the inside of the distal end of the multi-pass structure 100, and the first hole 110 and the first stepped hole 120 in the multi-pass structure 100 are connected, and the first stepped hole 120 is located on the distal side of the first hole 110, and the proximal end of the instrument tube 200 can be inserted into the first stepped hole 120 to connect to the multi-pass structure 100. Second, the proximal end of the instrument tube 200 is connected to the outside of the distal end of the multi-pass structure 100, and the second hole 210 and the second stepped hole in the instrument tube 200 are connected, and the second stepped hole is located on the proximal side of the second hole 210, and the distal end of the multi-pass structure 100 can be inserted into the second stepped hole to connect to the instrument tube 200. The connection between the multi-pass structure 100 and the instrument tube 200 is not limited in the present application.

[0033] It should be noted that the joint between the first hole 110 in the multi-pass structure 100 and the second hole 210 in the instrument tube 200 is flat, which means that the step between the first hole 110 and the second hole 210 is eliminated, and the present application also includes the following two cases:

[0034] The first is that the mandrel 300, the multi-pass structure 100 and the instrument tube 200 have no manufacturing errors, at this time the mandrel 300 can provide a common center point for the distal end of the multi-pass structure 100 and the proximal end of the instrument tube 200, ensure the coaxiality between the distal end of the multi-pass structure 100 and the proximal end of the instrument tube 200, so that the orifice edge of the distal end of the first channel 110 is flush with the orifice edge of the proximal end of the second channel 210, that is, the orifice edge of the distal end of the first channel 110 coincides with the orifice edge of the proximal end of the second channel 210, preventing the problem of poor coaxiality between the distal end of the multi-pass structure 100 and the proximal end of the instrument tube 200 due to installation errors, so as to prevent the formation of a step at the joint between the orifice edge of the distal end of the first channel 110 and the orifice edge of the proximal end of the second channel 210.

[0035] The second is that at least one of the mandrel 300, the multi-pass structure 100 and the instrument tube 200 has a manufacturing error, and the multi-pass structure 100 and the instrument tube 200 are fixed by glue. If the mandrel 300 has a manufacturing error, at this time even if the mandrel 300 is inserted, the mandrel 300 cannot make the distal end of the multi-pass structure 100 and the proximal end of the instrument tube 200 completely coaxial, so as to make the orifice edge of the distal end of the first channel 110 flush with the orifice edge of the proximal end of the second channel 210. If at least one of the multi-pass structure 100 and the instrument tube 200 has a manufacturing error, that is, the sizes of the distal orifice of the first channel 110 and the proximal orifice of the second channel 210 are inconsistent, at this time even if the mandrel 300 is inserted and the mandrel 300 makes the distal end of the multi-pass structure 100 and the proximal end of the instrument tube 200 coaxial, it cannot make the orifice edge of the distal end of the first channel 110 flush with the orifice edge of the proximal end of the second channel 210. It can be seen that in the case of manufacturing errors, the orifice edge of the distal end of the first channel 110 cannot be flush with the orifice edge of the proximal end of the second channel 210, and there is a step between the two. Since the instrument tube 200 and the multi-pass structure 100 are connected by glue, at this time the glue can overflow the joint between the instrument tube 200 and the multi-pass structure 100 to flow to the inner wall of the first channel 110 or the inner wall of the second channel 210. In this way, when the mandrel 300 is inserted into the joint of the first channel 110 and the second channel 210, the mandrel 300 can wipe the glue, so that the glue fills the step at the joint, and since the mandrel 300 moves the glue when wiping, it can avoid the glue forming a new step at the step, but form a structure similar to a guide slope at the step, so as to make the joint flat.

[0036] S200, fixing the multi-pass structure 100 and the instrument tube 200.

[0037] S300, pulling out the mandrel 300 from the multi-pass structure 100 and the instrument tube 200.

[0038] When the endoscope channel assembly is assembled by the assembling method of the present application, the mandrel 300 is inserted through the joint of the multi-pass structure 100 and the instrument tube 200, at this time, the mandrel 300 is inserted through the first hole 110 of the multi-pass structure 100 and the second hole 210 of the instrument tube 200, and the first hole 110 and the second hole 210 can be coaxial by the mandrel 300, so that the first hole 110 and the second hole 210 have relatively good coaxiality, thereby making the joint of the first hole 110 and the second hole 210 flat, so as to prevent the formation of a step at the joint of the first hole 110 and the second hole 210, so that the joint does not hinder the process of reverse threading of the guide wire or the process of normal threading of the surgical instrument, thereby solving the problems of difficulty in reverse threading of the guide wire or difficulty in normal threading of the surgical instrument.

[0039] It should be noted that the mandrel 300 includes a fitting section, and the outer dimensions (such as the diameter) of the fitting section remain unchanged in the extension direction of the fitting section, and the orifice rim of the distal end of the first hole 110 and the orifice rim of the proximal end of the second hole 210 are respectively sleeved on the fitting section. The present application does not limit the shape of other parts of the mandrel 300 except the fitting section, as long as the mandrel 300 can be inserted into the multi-pass structure 100.

[0040] Optionally, the multi-pass structure 100 is provided with an instrument port and a suction port, both of which are in communication with the first hole 110 in the multi-pass structure 100, and the surgical instrument can be inserted into the multi-pass connector through the instrument port, so that the surgical instrument extends into the lesion position in the patient's body to perform sampling or surgical operation on the lesion position, and the above-mentioned mandrel 300 can be inserted into the multi-pass structure 100 from the instrument port. The suction port can be connected with a negative pressure source, and under the action of the negative pressure source, blood clots, small stones, and pus-like flocculent matter in the human body can be sucked out from the lesion position of the patient, for example, the suction port can be in communication with the suction valve on the endoscope operation handle. Further, the multi-pass structure 100 is also provided with a liquid injection port, and a syringe can be used to inject physiological saline or liquid medicine into the human body through the liquid injection port to achieve the purpose of cleaning or treatment.

[0041] In an optional embodiment, the step of inserting the mandrel 300 at the joint of the multi-pass structure 100 and the instrument tube 200 includes:

[0042] S110, the proximal end of the instrument tube 200 is sleeved with the distal end of the multi-pass structure 100.

[0043] Here, the proximal end of the instrument tube 200 can be sleeved outside the distal end of the multi-pass structure 100, or the proximal end of the instrument tube 200 can be sleeved inside the distal end of the multi-pass structure 100.

[0044] S120, inserting the mandrel 300 from the multi-pass structure 100 until the insertion end of the mandrel 300 extends into the second channel 210.

[0045] In this embodiment, the instrument tube 200 is first sleeved with the multi-pass structure 100, and then the mandrel 300 is inserted from the multi-pass structure 100, that is, before the instrument tube 200 is sleeved with the multi-pass structure 100, the mandrel 300 is not inserted into the multi-pass structure 100 or the instrument tube 200, and the stepped hole of the other one of the multi-pass structure 100 and the instrument tube 200 which is not sleeved with the one of the multi-pass structure 100 and the instrument tube 200 occupies is not occupied by the mandrel 300, and at this time, the stepped hole still has a larger space, so that in the process of inserting the one of the multi-pass structure 100 and the instrument tube 200 which is not provided with the stepped hole into the stepped hole, the one of the multi-pass structure 100 and the instrument tube 200 which is not provided with the stepped hole is not blocked by the mandrel 300 and is easy to be inserted into the stepped hole. And when this embodiment is combined with the embodiment of "S600 is further included before S110", the outer circumferential surface of the one of the multi-pass structure 100 and the instrument tube 200 which is not provided with the stepped hole is coated with glue liquid, because the one of the multi-pass structure 100 and the instrument tube 200 which is not provided with the stepped hole is easy to be inserted into the stepped hole, this can prevent the one of the multi-pass structure 100 and the instrument tube 200 which is not provided with the stepped hole from scratching the hole of the stepped hole of the other one, so as to prevent the glue liquid on the one of the multi-pass structure 100 and the instrument tube 200 which is not provided with the stepped hole from being scratched to the hole of the stepped hole and reduce the amount of glue liquid between the multi-pass structure 100 and the instrument tube 200.

[0046] For example, the proximal end of the instrument tube 200 is sleeved into the distal end of the multi-pass structure 100, before the instrument tube 200 is sleeved inside the multi-pass structure 100, the mandrel 300 is not inserted into the multi-pass structure 100, so the first stepped hole 120 of the multi-pass structure 100 is not occupied by the mandrel 300, and the first stepped hole 120 has a larger space, so that when the instrument tube 200 is inserted into the first stepped hole 120, it is not blocked by the mandrel 300, so that the mandrel 300 is easy to be inserted into the first stepped hole 120. And in the case of coating the glue liquid on the outer circumferential surface of the instrument tube 200 and then inserting the instrument tube 200 into the first stepped hole 120, the instrument tube 200 can also be prevented from scratching the hole of the first stepped hole 120 to reduce the amount of glue liquid between the multi-pass structure 100 and the instrument tube 200.

[0047] In step S120, the core rod 300 is inserted from the multi-pass structure 100, and the insertion end of the core rod 300 extends into the second channel 210. In this process, the instrument tube 200 needs to be held, so that when the core rod 300 penetrates into the second channel 210, the instrument tube 200 can be subjected to a force in the direction in which the instrument tube 200 extends to the multi-pass structure 100, thereby preventing the instrument tube 200 from disengaging from the multi-pass structure 100. If only the instrument tube 200 is held, and the force exerted by the core rod 300 on the instrument tube 200 is too large, the core rod 300 can drive the instrument tube 200 away from the multi-pass structure 100. Since the hand only holds the instrument tube 200, the hand will move away from the multi-pass structure 100 synchronously with the instrument tube 200, and the instrument tube 200 will not move relative to the multi-pass structure 200, and the hand will not have a tactile sensation, so it is not easy to judge whether the instrument tube 200 has moved.

[0048] In an alternative embodiment, in step S120, the step of inserting the core rod 300 from the multi-pass structure 100 is specifically:

[0049] The multi-pass structure 100 and the instrument tube 200 are held at the same time, and the core rod 300 is inserted from the multi-pass structure 100.

[0050] In this embodiment, before the core rod 300 is inserted from the multi-pass structure 100, the multi-pass structure 100 and the instrument tube 200 are held at the same time, so that when the core rod 300 penetrates into the second channel 210, the instrument tube 200 can be subjected to a force in the direction in which the instrument tube 200 extends to the multi-pass structure 100, thereby preventing the instrument tube 200 from disengaging from the multi-pass structure 100; and since the multi-pass structure 100 is also held while the instrument tube 200 is held, even if the instrument tube 200 moves, the hand will not move relative to the multi-pass structure 100. At this time, if the core rod 300 drives the instrument tube 200 to move, the instrument tube 200 will move relative to the hand, thereby causing the hand to have a tactile sensation to judge whether the instrument tube 200 has moved. Compared with the way of observing with the eyes, the way of judging whether the instrument tube 200 has moved through the tactile sensation is more accurate.

[0051] In an alternative embodiment, the assembly method further comprises:

[0052] S400, judging whether the instrument tube 200 disengages from the multi-pass structure 100.

[0053] Here, the way of judging whether the instrument tube 200 disengages from the multi-pass structure 100 through the tactile sensation of the hand in the previous embodiment, and the way of judging whether the two disengage from each other through the observation of the eyes can also be used.

[0054] S500, if yes, the instrument tube 200 is driven to move towards the multi-pass structure 100, so that the instrument tube 200 engages with the multi-pass structure 100.

[0055] The embodiment pushes the instrument tube 200 to re-engage with the multi-pass structure 100 after determining that the instrument tube 200 is disengaged from the multi-pass structure 100, so as to avoid the annular groove between the instrument tube 200 and the multi-pass structure 100, and to avoid the inner wall of the annular groove hindering the guide wire and the surgical instrument during the process of the reverse guide wire and the positive surgical instrument.

[0056] In an alternative embodiment, step S110 further comprises:

[0057] S600, coating glue on the outer circumferential surface of one of the instrument tube 200 and the multi-pass structure 100 which can be sleeved in the other one.

[0058] Taking the instrument tube 200 sleeved in the multi-pass structure 100 as an example, step S600 is to coat glue on the outer circumferential surface of the instrument tube 200. In this way, when the instrument tube 200 is inserted into the first step hole 120 of the multi-pass structure 100, even if the instrument tube 200 scratches the inner wall of the first step hole 120, the inner wall of the first step hole 120 will scratch the glue on the outer circumferential surface of the instrument tube 200 out of the first step hole 120, rather than scratch the glue on the outer circumferential surface of the instrument tube 200 into the first step hole 120, so that the glue is accumulated in front of the instrument tube 200, which can prevent the glue from entering the second hole 210 of the instrument tube 200 when the instrument tube 200 is further inserted into the first step hole 120, thereby preventing the instrument tube 200 from forming a boss structure in the second hole 210 of the instrument tube 200 after the glue solidifies, which hinders the insertion of the medical instrument.

[0059] Taking the instrument tube 200 sleeved out of the multi-pass structure 100 as an example, step S600 is to coat glue on the outer circumferential surface of the multi-pass structure 100. In this way, when the multi-pass structure 100 is inserted into the second step hole of the instrument tube 200, the glue can be prevented from entering the first hole 110 of the multi-pass structure 100, thereby preventing the multi-pass structure 100 from forming a boss structure in the first hole 110 after the glue solidifies, which hinders the insertion of the medical instrument.

[0060] Of course, step S600 can also be to coat glue on the inner circumferential surface of one of the instrument tube 200 and the multi-pass structure 100 which can be sleeved out of the other one, which is not limited in the present application. Taking the instrument tube 200 sleeved in the multi-pass structure 100 as an example, step S600 is to coat glue on the inner circumferential surface of the first step hole 120 of the multi-pass structure 100; taking the instrument tube 200 sleeved out of the multi-pass structure 100 as an example, step S600 is to coat glue on the inner circumferential surface of the second step hole of the instrument tube 200.

[0061] Step S200 is specifically:

[0062] The glue between the instrument tube 200 and the multi-pass structure 100 is cured through a curing process.

[0063] The curing process here can be a UV irradiation process, so that the photosensitive glue is cured; or the curing process can also be a standing process, so that the glue is naturally cured.

[0064] In another alternative embodiment, step S600 can also not be included before step S110, and at this time step S200 can be specifically that the instrument tube 200 and the multi-pass structure 100 are fixed by means of hot melting welding or ultrasonic welding. The present application does not limit the fixing method between the instrument tube 200 and the multi-pass structure 100.

[0065] In an alternative embodiment, step S110 is specifically:

[0066] The proximal end of the instrument tube 200 is sleeved with the distal end of the multi-pass structure 100, and the relative rotation between the instrument tube 200 and the multi-pass structure 100 is controlled during the sleeving process. Alternatively, during the sleeving process, one of the instrument tube 200 and the multi-pass structure 100 can be rotated alone to make the instrument tube 200 and the multi-pass structure 100 rotate relative to each other; or the instrument tube 200 and the multi-pass structure 100 can be rotated simultaneously to make them rotate relative to each other.

[0067] Since the gap between the instrument tube 200 and the multi-pass structure 100 is very small, the instrument tube 200 can be in contact with the multi-pass structure 100 during the sleeving process of the instrument tube 200 and the multi-pass structure 100, thereby generating friction between them. Therefore, the present embodiment controls the relative rotation between the instrument tube 200 and the multi-pass structure 100 during the sleeving process, which can convert the friction generated between the two into rolling friction, and the rolling friction is smaller than the sliding friction. Therefore, it is easier to complete the sleeving of the instrument tube 200 and the multi-pass structure 100 by using the method of the present embodiment. Of course, the relative rotation between the instrument tube 200 and the multi-pass structure 100 can also be caused during the sleeving process, and the present application does not limit this.

[0068] In addition, when the present embodiment is combined with the technical solution of "S600 is included before S110", before the instrument tube 200 and the multi-pass structure 100 are sleeved, the outer circumferential surface of one of the instrument tube 200 and the multi-pass structure 100, which can be sleeved in the other, is coated with glue. If the glue is not uniformly coated on the outer circumferential surface of the above-mentioned one, the rotation of the instrument tube 200 and the multi-pass structure 100 can spread the glue evenly, so that the glue is more evenly distributed in the gap between the instrument tube 200 and the multi-pass structure 100, preventing the formation of a blank area, making the adhesion between the instrument tube 200 and the multi-pass structure 100 more firm, and preventing the two from separating.

[0069] In an alternative embodiment, step S110 is specifically:

[0070] The proximal end of the instrument tube 200 is sleeved into the distal end of the multi-pass structure 100.

[0071] Before step S110, it further includes:

[0072] S700, pressing the proximal end of the instrument tube 200, so that the proximal end of the instrument tube 200 is deformed in a concave manner.

[0073] Since the gap between the instrument tube 200 and the multi-pass structure 100 is small, the instrument tube 200 may come into contact with the multi-pass structure 100 during the sleeving process, thereby generating friction therebetween, which is not conducive to the insertion of the instrument tube 200 into the multi-pass structure 100. Therefore, the embodiment presses the proximal end of the instrument tube 200 before the insertion of the instrument tube 200 into the first channel 110 of the multi-pass structure 100, so that the proximal end of the instrument tube 200 is deformed in a concave manner, which can reduce the cross-sectional area of the instrument tube 200, i.e., reduce the outer dimensions of the instrument tube 200, thereby increasing the gap between the instrument tube 200 and the multi-pass structure 100 and reducing the risk of contact therebetween, thereby facilitating the insertion of the instrument tube 200 into the multi-pass structure 100. Of course, S700 can also not be included before step S110, which is not limited in the present application.

[0074] In the above embodiment, the proximal end of the instrument tube 200 is deformed in a concave manner before the insertion of the instrument tube 200 into the multi-pass structure 100. Since the instrument tube 200 has a certain plasticity, the resilience thereof is insufficient, which may result in that the instrument tube 200 is still in a state of concave deformation after the instrument tube 200 is connected with the multi-pass structure 100, thereby hindering the insertion of the mandrel 300.

[0075] In order to solve the above problem, in an alternative embodiment, the insertion end of the mandrel 300 is provided with a tapered guide surface.

[0076] In the embodiment, the insertion end of the mandrel 300 is provided with a tapered guide surface, and the tapered guide surface gradually expands along the direction extending from the insertion end of the mandrel 300 to the other end, that is, the distal end of the guide surface is a small end, and the proximal end of the guide surface is a large end. During the process that the mandrel 300 extends into the second channel 210 of the instrument tube 200, the small end of the guide surface will first enter the second channel 210, and the size of the small end of the guide surface is smaller, so that even if the instrument tube 200 is still in the state of concave deformation, the mandrel 300 is easy to enter the second channel 210; and as the mandrel 300 further extends into the second channel 210, the larger size of the guide surface will gradually enter the second channel 210 and will extrude the concave part of the instrument tube 200, so that the concave part of the instrument tube 200 expands outward, thereby restoring the deformation of the instrument tube 200, that is, no longer maintaining the state of concave, that is, the tapered guide surface can reshape the concave part of the instrument tube 200 to restore it to a flat state. Of course, the insertion end of the mandrel 300 can also not be provided with a tapered guide surface, which is not limited in the present application.

[0077] In an alternative embodiment, the first channel 110 includes a first hole section 111 near the hole edge of the distal end thereof, and the second channel 210 includes a second hole section 211 near the hole edge of the proximal end thereof, the first hole section 111 and the second hole section 211 are both constant-diameter hole sections, and the diameter of the first hole section 111 is the same as that of the second hole section 211. It should be noted that the junction of the first hole section 111 and the second hole section 211 is the junction of the first channel 110 and the second channel 210.

[0078] The mandrel 300 is arranged at the junction of the multi-channel structure 100 and the instrument tube 200, and the mandrel 300 will enter the first hole section 111 and the second hole section 211 and smooth the junction of the first hole section 111 and the second hole section 211, so the size of the mandrel 300 matches the size of the hole edge of the first hole section 111 and the hole edge of the second hole section 211, and the first hole section 111 and the second hole section 211 are constant-diameter hole sections in the embodiment, so the size of all parts of the first hole section 111 matches the size of the mandrel 300, and the size of all parts of the second hole section 211 matches the size of the mandrel 300, so that when the mandrel 300 enters the first hole section 111 and the second hole section 211, it will contact the inner wall of the first hole section 111 and the inner wall of the second hole section 211, thereby limiting the position of the mandrel 300 to better smooth the junction. Of course, the first hole section 111 and the second hole section 211 can also be deformed hole sections, which are not limited in the present application.

[0079] And / or, in an alternative embodiment, the first hole 110 includes a first hole section 111 near the orifice rim of the distal end of the first hole 110, and the multi-pass structure 100 includes a transparent portion in which the first hole section 111 is formed. In combination with the embodiment of "the proximal end of the instrument tube 200 is sleeved into the distal end of the multi-pass structure 100", the transparent portion of the multi-pass structure 100 is formed with the first hole section 111, so that it is convenient to observe whether the mandrel 300 passes through the joint of the multi-pass structure 100 and the instrument tube 200 through the transparent portion, so as to confirm the position of the mandrel 300.

[0080] The endoscope channel assembly according to the embodiments of the present application is a channel assembly applied to an endoscope, and the endoscope can be a bronchoscope, a nephroscopy, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasoscope, an oral cavity scope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc., and the embodiments of the present application do not specifically limit the type of the endoscope.

[0081] The above embodiments of the present application mainly describe the differences between the embodiments, and the different optimization features between the embodiments can be combined to form a better embodiment without contradiction. In order to consider the brevity of the writing, the above will not be described again. The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive. Those skilled in the art can make many forms without departing from the scope of the present application under the inspiration of the present application, and all the forms belong to the protection scope of the present application.

Claims

1. A method of assembling an endoscope channel assembly, comprising: The method comprises the following steps: inserting a core rod (300) at the joint of the multi-pass structure (100) and the instrument tube (200) to smooth the joint of a first channel (110) in the multi-pass structure (100) and a second channel (210) in the instrument tube (200); fixing the multi-pass structure (100) and the instrument tube (200); pulling out the core rod (300) from the multi-pass structure (100) and the instrument tube (200).

2. The method of assembling according to claim 1, wherein, The step of inserting the core rod (300) at the joint of the multi-pass structure (100) and the instrument tube (200) comprises the following steps: sleeving a proximal end of the instrument tube (200) with a distal end of the multi-pass structure (100); inserting the core rod (300) from the multi-pass structure (100) until an insertion end of the core rod (300) extends into the second channel (210).

3. The method of assembling according to claim 2, wherein, The step of inserting the core rod (300) from the multi-pass structure (100) specifically comprises the following step: simultaneously holding the multi-pass structure (100) and the instrument tube (200) and inserting the core rod (300) from the multi-pass structure (100).

4. The method of assembling according to claim 2, wherein, The assembling method further comprises the following steps: judging whether the instrument tube (200) and the multi-pass structure (100) are disengaged; if yes, pushing the instrument tube (200) to move towards the multi-pass structure (100) to engage the instrument tube (200) with the multi-pass structure (100).

5. The method of assembling according to claim 2, wherein, Before the step of sleeving the proximal end of the instrument tube (200) with the distal end of the multi-pass structure (100), the method further comprises the following steps: applying glue to the outer circumferential surface of one of the instrument tube (200) and the multi-pass structure (100) which can be sleeved in the other one. The step of fixing the multi-pass structure (100) and the instrument tube (200) specifically comprises the following step: curing the glue between the instrument tube (200) and the multi-pass structure (100) through a curing process.

6. The method of assembling according to any one of claims 2 to 5, wherein, The step of sleeving the proximal end of the instrument tube (200) with the distal end of the multi-pass structure (100) specifically comprises the following step: sleeving the proximal end of the instrument tube (200) with the distal end of the multi-pass structure (100) and controlling relative rotation between the instrument tube (200) and the multi-pass structure (100) during the sleeving.

7. The method of assembling according to any one of claims 2 to 5, wherein, The step of sleeving the proximal end of the instrument tube (200) with the distal end of the multi-pass structure (100) specifically comprises the following steps: sleeving the proximal end of the instrument tube (200) into the distal end of the multi-pass structure (100); Before the step of sleeving the proximal end of the instrument tube (200) with the distal end of the multi-pass structure (100), the method further comprises the following step: pressing the proximal end of the instrument tube (200) to make the proximal end of the instrument tube (200) concave.

8. The method of assembling according to claim 7, wherein, The insertion end of the core rod (300) is provided with a tapered guide surface.

9. The method of assembling according to claim 1, wherein, The first hole channel (110) comprises a first hole section (111) close to the hole orifice edge of the distal end of the first hole channel (110), and the second hole channel (210) comprises a second hole section (211) close to the hole orifice edge of the proximal end of the second hole channel (210), the first hole section (111) and the second hole section (211) are both equal-diameter hole sections, and the diameter of the first hole section (111) is the same as the diameter of the second hole section (211); and / or, The first hole channel (110) comprises a first hole section (111) close to the hole orifice edge of the distal end of the first hole channel (110), and the multi-pass structure (100) comprises a transparent part, and the first hole section (111) is formed in the transparent part.

10. An endoscope channel assembly, characterized by, The assembly method is applied to assemble a formed product.

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