An instrument pipe joint, an endoscope handle, and an endoscope

Abstract

The present application relates to the field of endoscope technology, and particularly relates to an instrument tube joint, an endoscope handle and an endoscope. The instrument tube joint includes an instrument nozzle and a negative pressure nozzle. The instrument nozzle has an instrument channel that penetrates along its extending direction. The negative pressure nozzle is connected to the instrument nozzle, and the negative pressure nozzle has a negative pressure channel that communicates with the instrument channel. The instrument channel forms an instrument inlet at the proximal end of the instrument nozzle. The movement path of the treatment instrument that enters through the instrument inlet and extends arbitrarily into the instrument channel does not intersect with the inner wall of the negative pressure channel. In the above solution, the proximal end of the instrument tube joint is used to insert the treatment instrument, and the distal end of the instrument tube joint is used to connect the instrument tube. When inserting the treatment instrument, the treatment instrument enters through any position of the instrument inlet and cannot extend into the negative pressure channel along any movement path, thereby ensuring that the treatment instrument can be smoothly introduced into the instrument tube and ensuring the accuracy of the placement of the treatment instrument.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and in particular to an instrument pipe joint, an endoscope handle and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device, comprising an operating handle and an insertion part. The insertion part can enter the human body through a human cavity or a surgical incision. By turning the lever on the operating handle, the active bending section at the distal end of the insertion part can be driven to adjust its posture. The camera module at the distal end of the insertion part can observe the internal tissues of the human body, helping doctors determine the location of lesions in the patient's body and the tissue structure characteristics of the lesion location.

[0003] For tissue lesions, it is necessary to insert an external treatment instrument through an instrument channel built into the insertion part to the lesion for sampling, or to deliver therapeutic substances into the human body through the instrument channel. In the prior art, an instrument pipe joint is provided on the handle of the endoscope, and medical staff can insert the external treatment instrument into the human body through the instrument pipe joint. However, in the actual use process, it is found that the treatment instrument has the problem of difficulty in insertion. Summary of the invention

[0004] The embodiments of the present application disclose an instrument pipe joint, an endoscope handle and an endoscope to solve the technical problem of difficulty in inserting treatment instruments in endoscopes in related technologies.

[0005] In order to solve the above problems, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an instrument pipe connector, comprising:

[0007] An instrument mouth, wherein the instrument mouth has an instrument channel extending along the extension direction thereof;

[0008] A negative pressure nozzle, the negative pressure nozzle is connected to the instrument nozzle, and the negative pressure nozzle has a negative pressure channel connected to the instrument channel;

[0009] The instrument channel forms an instrument entrance at the proximal end of the instrument mouth, and the moving path of the treatment instrument entering through the instrument entrance and extending arbitrarily into the instrument channel does not intersect with the inner wall of the negative pressure channel.

[0010] Further, the negative pressure nozzle has a proximal side and a distal side in the extension direction of the instrument nozzle, the proximal side is adjacent to the proximal end of the instrument nozzle, and the distal side is adjacent to the distal end of the instrument nozzle.

[0011] Optionally, the instrument nozzle is provided with an avoidance gap at the connection point between the negative pressure channel and the instrument channel, and the avoidance gap is provided adjacent to the distal end side of the negative pressure nozzle.

[0012] Optionally, a guiding protrusion is provided at the connection between the negative pressure channel and the instrument channel of the instrument nozzle, and the guiding protrusion is arranged adjacent to the proximal side of the negative pressure nozzle.

[0013] Furthermore, the instrument nozzle includes an instrument nozzle body and an instrument tube docking portion connected to the distal end of the instrument nozzle body. The instrument channel penetrates through the instrument nozzle body and the instrument tube docking portion. A receiving cavity communicating with the instrument channel is provided at the distal end of the instrument nozzle body. The opening size of the receiving cavity is larger than the opening size of the instrument channel to form a second step surface therebetween. The proximal end portion of the instrument tube docking portion is received in the receiving cavity and abuts against the second step surface.

[0014] Furthermore, the contour of the proximal end face of the instrument tube docking portion matches the contour of the second step surface, and the area of the proximal end face of the instrument tube docking portion is smaller than or equal to the area of the second step surface.

[0015] Furthermore, the distal end of the instrument tube docking portion has a docking section for docking with the instrument tube, and the included angle between the extending direction of the docking section and the extending direction of the negative pressure nozzle is an obtuse angle.

[0016] Furthermore, a first guiding surface adjacent to the avoiding notch is further provided at the proximal end portion of the instrument tube docking portion, and the first guiding surface is inclined relative to the extending direction of the instrument nozzle body.

[0017] Furthermore, there is a dispensing gap between the portion of the instrument tube docking portion received in the receiving cavity and the inner wall of the receiving cavity.

[0018] Furthermore, a glue injection groove communicating with the dispensing gap is formed between the distal end of the instrument nozzle body and the instrument tube docking portion, and the width of the glue injection groove is larger than the width of the dispensing gap.

[0019] In a second aspect, an embodiment of the present application further provides an endoscope handle, and the endoscope handle includes the aforementioned instrument tube joint.

[0020] In a third aspect, an embodiment of the present application further provides an endoscope, and the endoscope includes the aforementioned endoscope handle.

[0021] The technical solution adopted in the embodiment of the present application can achieve the following beneficial effects:

[0022] In the instrument tube connector, endoscope handle, and endoscope disclosed in the embodiments of the present application, the proximal end of the instrument tube connector is for inserting a treatment instrument, and the distal end of the instrument tube connector is for connecting an instrument tube. When the treatment instrument is inserted into the instrument channel at any position of the instrument inlet, since the movement path of the treatment instrument extending arbitrarily into the instrument channel does not intersect the inner wall of the negative pressure channel, the distal end of the treatment instrument cannot extend into the negative pressure channel, but will continue to move along the inner wall of the instrument channel until it is introduced into the instrument tube. This method avoids the situation where the distal end of the treatment instrument extends into the negative pressure channel, causing difficulties in inserting the treatment instrument, and there is no need to readjust the posture of the treatment instrument and insert it again, significantly improving the smoothness and convenience of inserting the treatment instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of the instrument tube connector according to the embodiment of the present application;

[0025] Figure 2 is one of the schematic internal structural diagrams of the instrument tube connector according to the embodiment of the present application;

[0026] Figure 3 is Figure 2 a partial enlarged schematic diagram of part A in

[0027] Figure 4 is another schematic internal structural diagram of the instrument tube connector according to the embodiment of the present application;

[0028] Figure 5 is a schematic structural diagram of the instrument nozzle body according to the embodiment of the present application;

[0029] Figure 6 is a schematic structural diagram of the instrument tube docking part according to the embodiment of the present application;

[0030] Figure 7 is a schematic internal structural diagram of the instrument tube docking part according to the embodiment of the present application;

[0031] Figure 8 is another schematic internal structural diagram of the instrument tube connector according to the embodiment of the present application;

[0032] Figure 9 is a third schematic internal structural diagram of the instrument tube connector according to the embodiment of the present application;

[0033] Figure 10 This is the fourth schematic diagram of the internal structure of the instrument tube connector according to the embodiments of the present application.

[0034] In the figure:

[0035] 100 - instrument nozzle, 110 - instrument nozzle body, 110a - accommodation cavity, 120 - instrument tube docking part, 121 - first guiding surface, 130 - instrument channel, 130a - instrument inlet, 140 - avoidance notch, 150 - first step surface, 160 - second step surface, 170 - dispensing gap, 180 - glue injection groove, 190 - guiding protrusion, 190a - second guiding surface; 200 - negative pressure nozzle, 210 - negative pressure channel; a - first extension direction, b - second extension direction. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0037] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data 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 generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0038] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative distances of the endoscope and its accessories from the user in the usage environment. Among them, 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".

[0039] In the related art, in order to ensure the normal negative pressure suction function and the function of inserting a treatment instrument of the endoscope, an instrument tube connector is provided on the endoscope handle. The instrument tube connector has an instrument channel and a negative pressure channel communicating with the instrument channel. The treatment instrument can sequentially pass through the instrument channel and the instrument tube into the internal tissues of the human body, and the negative pressure channel is communicated with the suction valve located at the proximal end of the endoscope handle through a negative pressure tube.

[0040] During the research process, the inventor found that for the treatment instrument inserted from the proximal end of the instrument channel, its distal end often abuts against the inner wall of the negative pressure channel, resulting in the distal end of the treatment instrument extending into the negative pressure channel and failing to enter the instrument tube normally, making it difficult to insert the treatment instrument. It is necessary to adjust the insertion posture of the treatment instrument and try again.

[0041] Based on the above situation, embodiments of the present application provide an instrument tube joint, an endoscope handle, and an endoscope. The following will be combined with the attached Figures 1 to 10 to illustrate in detail the instrument tube joint, the endoscope handle, and the endoscope provided by the embodiments of the present application through specific embodiments and their application scenarios.

[0042] Please refer to Figures 1 to 4 As shown, embodiments of the present application disclose an instrument tube joint. The disclosed instrument tube joint includes an instrument nozzle 100 and a negative pressure nozzle 200. Among them, the instrument nozzle 100 has an instrument channel 130 that penetrates along its extending direction, and the negative pressure nozzle 200 has a negative pressure channel 210 that penetrates along its extending direction. The extending direction of the negative pressure nozzle 200 is different from the extending direction of the instrument nozzle 100. The negative pressure nozzle 200 is connected to the instrument nozzle 100 so that the negative pressure channel 210 is connected to the instrument channel 130.

[0043] The instrument channel 130 forms an instrument inlet 130a at the proximal end of the instrument nozzle 100. The treatment instrument can extend into the instrument channel 130 through the instrument inlet 130a. In the embodiments of the present application, the movement path of the treatment instrument that enters through the instrument inlet 130a and extends arbitrarily into the instrument channel 130 does not intersect with the inner wall of the negative pressure channel 210.

[0044] It should be noted that when it is mentioned in this article that the treatment instrument enters through the instrument inlet 130a, it means that the treatment instrument can enter the instrument channel 130 through any position of the instrument inlet 130a. Specifically, it can be divided into: the treatment instrument uses any point on the inner edge of the instrument inlet 130a as a support point and extends into the instrument channel 130 in a linear movement or an approximately linear movement; or the treatment instrument does not abut against the inner edge of the instrument inlet 130a and extends into the instrument channel 130 in a linear movement or an approximately linear movement.

[0045] The movement path L of the treatment instrument does not intersect with the inner wall of the negative pressure channel 210, resulting in the distal end of the treatment instrument being unable to extend into the negative pressure channel 210. Instead, it continues to move along the inner wall of the instrument channel 130 until it is guided into the instrument tube. This method avoids the situation where the distal end of the treatment instrument extends into the negative pressure channel 210, and also avoids the situation where it is difficult to insert the treatment instrument and it is necessary to readjust the posture of the treatment instrument and insert it again, significantly improving the smoothness and convenience of inserting the treatment instrument.

[0046] In an embodiment of the present application, the negative pressure nozzle 200 may be connected to the instrument nozzle 100 in an integrally formed manner, or may be connected to the instrument nozzle 100 by means such as bonding, snap connection, and screw connection. The present application does not make specific limitations on this.

[0047] Please refer to Figure 4 , Figure 4 , which shows the movement path L of the treatment instrument inserted into the instrument channel 130 in an extreme position. This extreme position means that the treatment instrument in this position state is more likely to extend into the negative pressure channel 210 compared to the treatment instrument in other position states. It can be seen that the movement path L of the treatment instrument in this extreme position does not intersect the inner wall of the negative pressure channel 210. Considering the space occupied by the treatment instrument itself, it is more difficult for the distal end of the treatment instrument to extend into the negative pressure channel 210, thereby ensuring the accuracy of the placement of the treatment instrument.

[0048] In some embodiments of the present application, please refer to Figures 2 to 5 , the instrument nozzle 100 is provided with an avoidance notch 140 at the connection between the negative pressure channel 210 and the instrument channel 130. The negative pressure nozzle 200 has a proximal side and a distal side in the extending direction of the instrument nozzle 100. The proximal side of the negative pressure nozzle 200 is adjacent to the proximal end of the instrument nozzle 100, and the distal side of the negative pressure nozzle 200 is adjacent to the distal end of the negative pressure nozzle 200. The avoidance notch 140 is provided adjacent to the distal side of the negative pressure nozzle 200; that is to say, an avoidance notch 140 adjacent to the distal side of the negative pressure nozzle 200 is provided in the instrument nozzle 100. Even when the treatment instrument is inserted into the instrument channel 130 at the Figure 4 extreme position in, the distal end of the treatment instrument will extend into the avoidance notch 140 and then abut against the inner wall of the instrument channel 130, rather than being able to abut against the inner wall of the negative pressure channel 210. This method avoids the situation where the distal end of the treatment instrument extends into the negative pressure channel 210 and the situation where the posture of the treatment instrument needs to be readjusted and inserted again, significantly improving the smoothness and convenience of inserting the treatment instrument.

[0049] Due to the existence of the avoidance notch 140, a first step surface 150 is formed in the instrument nozzle 100. The first step surface 150 faces the distal end of the instrument nozzle 100 and can avoid hindering the extension of the treatment instrument. It should be noted that the formation of the avoidance notch 140 can be understood as that the extension length of the distal side of the negative pressure nozzle 200 into the instrument channel 130 is less than the extension length of its proximal side into the instrument channel 130, that is, the space occupied by the distal side of the negative pressure nozzle 200 in the instrument channel 130 is less than the space occupied by its proximal side in the instrument channel 130, thereby forming the avoidance notch 140; of course, the formation of the avoidance notch 140 can also be understood as that the opening size of the instrument channel 130 on the distal side of the negative pressure nozzle 200 is larger than the opening size of the instrument channel 130 on the proximal side of the negative pressure nozzle 200, thereby forming the avoidance notch 140.

[0050] During the research process, the inventor found that due to the existence of the avoidance notch 140 and in order to ensure that the distal end of the instrument channel 130 can be docked with an instrument tube of a smaller diameter, in the extending direction of the instrument nozzle 100, the caliber change trend of the instrument channel 130 is not consistent. In other words, please refer to Figure 2 , in the direction of the instrument nozzle 100 extending from its proximal end to its distal end, the caliber of the instrument channel 130 changes from small to large and then from large to small. In the related art, the instrument tube joint is usually produced by injection molding. If the instrument nozzle 100 itself is produced by integral injection molding, there will be difficulties in demolding or even impossible to produce.

[0051] Based on this situation, in order to enable the instrument tube joint to still be produced by injection molding to ensure the production efficiency of the instrument tube joint, in the embodiment of the present application, the instrument nozzle 100 can be a split structure. Specifically, the instrument nozzle 100 includes an instrument nozzle body 110 and an instrument tube docking portion 120 connected to the distal end of the instrument nozzle body 110. The instrument channel 130 penetrates through the instrument nozzle body 110 and the instrument tube docking portion 120. In the extending direction of the instrument nozzle 100 from its proximal end to its distal end, the caliber change trend of the part of the instrument channel 130 distributed in the instrument nozzle body 110 is consistent, and the caliber change trend of the other part of the instrument channel 130 distributed in the instrument tube docking portion 120 is also consistent. The instrument nozzle body 110 and the instrument tube docking portion 120 can be respectively processed by injection molding. In this process, both are easy to demold. After the injection molding is completed, the two can be docked to form the instrument tube joint.

[0052] In the embodiment of the present application, the instrument nozzle body 110 and the instrument tube docking portion 120 can be connected by means of glue bonding, screw connection, snap connection, etc., as long as the relative fixation of the two can be achieved, and the present application does not make specific limitations.

[0053] In an alternative embodiment, the instrument nozzle body 100 is connected to the instrument tube docking portion 120 by glue bonding. Specifically, a receiving cavity 110a is provided at the distal end of the instrument nozzle body 110. The opening size of the receiving cavity 110a is larger than the opening size of the instrument channel 130, and a second step surface 160 is formed therebetween. The proximal end portion of the instrument tube docking portion 120 can be received in the receiving cavity 110a and abuts against the second step surface 160. The instrument tube docking portion 120 can be fixedly connected to the inner wall of the receiving cavity 110a by glue bonding.

[0054] In a further technical solution, the contour of the proximal end face of the instrument tube docking portion 120 matches the contour of the second step face 160, and the area of the proximal end face of the instrument tube docking portion 120 is smaller than the area of the second step face 160. In this case, when the instrument nozzle body 110 and the instrument tube docking portion 120 are connected, the second step face 160 has a portion that radially protrudes from the proximal end face of the instrument tube docking portion 120. In this way, it is possible to prevent the proximal end face of the instrument tube docking portion 120 from blocking the treatment instrument extending into the instrument channel 130, and avoid the passage obstacle of inserting the treatment instrument into the instrument channel 130.

[0055] Please refer to Figure 6 and Figure 7 , the instrument tube docking portion 120 includes a mounting section 121 and a docking section 122 connected to the distal end of the mounting section 121. The mounting section 121 can be accommodated in the receiving cavity 110a to achieve connection and fixation with the instrument nozzle body 100. It should be understood that the instrument tube docking portion 120 has a channel penetrating through the mounting section 121 and the docking section 122, and this channel is part of the instrument channel 130.

[0056] In the extending direction of the instrument tube joint, the cross-sectional shape of the mounting section 121 matches the opening shape of the receiving cavity 110a. When the mounting section 121 is accommodated in the receiving cavity 110a, there is a dispensing gap 170 between the mounting section 121 and the receiving cavity 110a, and glue can be added into the dispensing gap 170 to ensure the stability of the connection between the instrument nozzle body 110 and the instrument tube docking portion 120.

[0057] The inventor found during the research process that since the receiving cavity 110a is connected to the instrument channel 130, before the mounting section 121 is placed in the receiving cavity 110a, it basically does not have the function of storing glue, and it is necessary to inject glue into the dispensing gap 170 after placing the mounting section 121. However, due to the small width of the dispensing gap 170, there are difficulties in injecting glue and uneven distribution of glue during the glue injection process, which in turn leads to poor connection stability between the instrument nozzle body 110 and the instrument tube docking portion 120.

[0058] Based on the above situation, in some embodiments of the present application, please refer to Figure 3, a recessed structure is further provided on the outer edge of the distal end surface of the installation section 121. The recessed structure and the inner wall of the accommodation cavity 110a form a glue injection groove 180 communicating with the dispensing gap 170. The width of the glue injection groove 180 is greater than the width of the dispensing gap 170. When gluing the instrument nozzle body 110 and the instrument tube docking part 120, only need to inject glue into the glue injection groove 180, and the glue can slowly seep into the dispensing gap 170. In this way, the uniformity of the glue distribution in the dispensing gap 170 can be improved, thereby ensuring the reliability of the connection between the instrument nozzle body 110 and the instrument tube docking part 120, and also enhancing the convenience of glue injection.

[0059] Please continue to refer to Figure 6 and Figure 7 , the cross-sectional shape of the installation section 121 perpendicular to the extension direction of the instrument nozzle body 110 matches the opening shape of the accommodation cavity 110a, and both are non-circular. During the gluing and assembly process, the instrument tube docking part 120 can be prevented from rotating relative to the instrument nozzle body 110.

[0060] As can be seen from the foregoing, the negative pressure channel 210 can be communicated with the suction valve located at the proximal end of the endoscope handle through a negative pressure tube, and the instrument tube docking part 120 needs to be docked with the instrument tube distributed at the distal end of the instrument tube joint. Based on this situation, in a further technical solution, the extension direction of the instrument tube docking part 120 is at least away from the extension direction of the negative pressure nozzle 200. In the embodiment of the present application, it is specifically manifested that the extension direction of the docking section 122 is at least away from the extension direction of the negative pressure nozzle 200. The so-called at least away from herein means that the included angle between the extension direction of the negative pressure nozzle 200 relative to the instrument nozzle body 110 and the extension direction of the docking section 122 relative to the instrument nozzle body 110 is an obtuse angle.

[0061] Based on the above technical solution, when the instrument tube joint of the embodiment of the present application is applied to an endoscope, it can avoid large bending deformation of the negative pressure tube and the instrument tube when they are docked with the instrument tube joint, and also avoid the situation that the negative pressure tube or the instrument tube is bent by itself resulting in channel blockage, taking into account the smoothness of the channels of the negative pressure tube and the instrument tube.

[0062] In a further technical solution, a first guide surface 121a adjacent to the avoidance notch 140 is further provided at the proximal end of the instrument tube docking portion 120, and the first guide surface 121a is inclined relative to the extension direction of the instrument nozzle body 110; in an embodiment of the present application, the first guide surface 121a can be provided on the inner wall of the mounting section 121, the proximal end of the first guide surface 121a is in contact with the avoidance notch 140, and the distal end of the first guide surface 121a is in contact with the docking section 122. During the insertion of the treatment instrument, even if the distal end of the treatment instrument is biased toward the negative pressure nozzle 200, its distal end can abut against the first guide surface 121a, and slide into the docking section 122 guided by the first guide surface 121a, and then enter the instrument tube connected to the docking section 122. The setting of the first guide surface 121a can improve the smoothness of the insertion of the treatment instrument.

[0063] In the aforementioned embodiment, by providing an avoidance notch adjacent to the proximal side of the negative pressure nozzle 200 in the nozzle 100, the moving path of the treatment instrument cannot abut against the inner wall of the negative pressure channel 210, thereby ensuring smooth insertion of the treatment instrument. Figure 8 and Figure 9 A guide protrusion 190 is provided in the instrument nozzle body 110, adjacent to the proximal side of the negative pressure nozzle 200, and the guide protrusion 190 has a second guide surface 190a which is inclined relative to the axial direction of the instrument nozzle 100. The second guide surface 190a can be an arc surface protruding into the instrument channel 130. Based on the guiding effect of the second guide surface 190a on the distal end of the treatment instrument, the distal end of the treatment instrument can also be prevented from abutting against the inner wall of the negative pressure channel 210.

[0064] It should be understood that, based on the setting of the guide protrusion 190, if the instrument nozzle body 110 is produced by injection molding, demolding can be performed from two directions; alternatively, the instrument nozzle body 110 can be formed by splicing two splicing units, and the mating surface of the two splicing units can be a longitudinal section of the instrument nozzle body 110, and the two splicing units can be connected and fixed by gluing.

[0065] In some other embodiments of this application, please see Figure 10, the instrument nozzle body 110 may include a first segment and a second segment connected to the distal end of the first segment. In the direction of the instrument nozzle body 110 extending from the proximal end to the distal end, the first extension direction a of the first segment is different from the second extension direction b of the second segment. The negative pressure nozzle 200 is connected to the second segment and is adjacent to the junction of the first segment and the second segment. When the treatment instrument is inserted into the instrument channel along its movement path L in the extreme position, its distal end also cannot abut against the inner wall of the negative pressure channel 210. Based on this technical solution, by bending the instrument nozzle body 110, it is also possible to avoid the situation of having to readjust the posture of the treatment instrument and insert it again, significantly improving the smoothness and convenience of inserting the treatment instrument.

[0066] The embodiment of the present application also discloses an endoscope handle, including the aforementioned instrument tube joint. Specifically, the endoscope handle includes a handle housing having an instrument nozzle mounting position, and the instrument tube joint is provided at the instrument nozzle mounting position.

[0067] The embodiment of the present application also discloses an endoscope, including the aforementioned endoscope handle and an insertion portion, and the proximal end of the insertion portion is connected to the endoscope handle.

[0068] In the above embodiments of the present application, the differences between the various embodiments are mainly described. As long as the different optimized features between the various embodiments are not contradictory, they can be combined to form a more optimal embodiment. Considering the simplicity of the text, it will not be elaborated here.

[0069] The above are only the embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An instrument pipe joint, characterized in that, Comprising: An instrument nozzle (100) having an instrument channel (130) extending therethrough along its extending direction; A negative pressure nozzle (200) connected to the instrument nozzle (100), the negative pressure nozzle (200) having a negative pressure channel (210) communicating with the instrument channel (130); The negative pressure nozzle (200) has a proximal side and a distal side in the extending direction of the instrument nozzle (100), the proximal side is adjacent to the proximal end of the instrument nozzle (100), the distal side is adjacent to the distal end of the instrument nozzle (100), and the instrument nozzle (100) is provided with an avoidance notch (140) at the communication position of the negative pressure channel (210) and the instrument channel (130), and the avoidance notch (140) is arranged adjacent to the distal side of the negative pressure nozzle (200); The instrument channel (130) forms an instrument inlet (130a) at the proximal end of the instrument nozzle (100), and the movement path of the treatment instrument entering through the instrument inlet (130a) and extending arbitrarily into the instrument channel (130) does not intersect with the inner wall of the negative pressure channel (210); The instrument nozzle (100) includes an instrument nozzle body (110) and an instrument tube docking portion (120) connected to the distal end of the instrument nozzle body (110). A receiving cavity (110a) communicating with the instrument channel (130) is provided at the distal end of the instrument nozzle body (110). The instrument inlet (130a) is axially opposite to the receiving cavity (110a). The proximal end portion of the instrument tube docking portion (120) is received in the receiving cavity (110a), and the instrument channel (130) penetrates through the instrument nozzle body (110) and the instrument tube docking portion (120).

2. The instrument pipe joint according to claim 1, wherein, The opening size of the receiving cavity (110a) is larger than the opening size of the instrument channel (130) to form a second step surface (160) therebetween. The proximal end portion of the instrument tube docking portion (120) is received in the receiving cavity (110a) and abuts against the second step surface (160).

3. The instrument pipe joint according to claim 2, characterized in that, The contour of the proximal end face of the instrument tube docking portion (120) matches the contour of the second step surface (160), and the area of the proximal end face of the instrument tube docking portion (120) is less than or equal to the area of the second step surface (160).

4. The instrument pipe joint according to claim 2, characterized in that, The distal end of the instrument tube docking portion (120) has a docking section (122) for docking with an instrument tube, and the included angle between the extending direction of the docking section (122) and the extending direction of the negative pressure nozzle (200) is an obtuse angle.

5. The instrument pipe joint according to claim 4, characterized in that The proximal end portion of the instrument tube docking portion (120) is also provided with a first guiding surface (121a) adjacent to the avoidance notch (140), and the first guiding surface (121a) is inclined with respect to the extending direction of the instrument nozzle body (110).

6. The instrument pipe joint according to claim 2, characterized in that, There is a dispensing gap (170) between the portion of the instrument tube docking portion (120) received in the receiving cavity (110a) and the inner wall of the receiving cavity (110a).

7. The instrument pipe joint according to claim 6, characterized in that, A glue injection groove (180) communicating with the dispensing gap (170) is further formed between the distal end of the instrument nozzle body (110) and the instrument tube docking portion (120), and the width of the glue injection groove (180) is greater than the width of the dispensing gap (170).

8. An endoscope handle, characterized in that, Comprising the instrument tube joint according to any one of claims 1 to 7.

9. An endoscope, characterized in that, Comprising the endoscope handle according to claim 8.

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