WO2023087737A1

WO2023087737A1 - Bending portion of endoscope insertion part, endoscope insertion part, and endoscope

Info

Publication number: WO2023087737A1
Application number: PCT/CN2022/103683
Authority: WO
Inventors: 张剑; 刘孟华; 沈和良
Original assignee: 杭州莱恩瑟特医疗技术有限公司
Priority date: 2021-11-16
Filing date: 2022-07-04
Publication date: 2023-05-25

Abstract

A bending portion (1) of an endoscope insertion part, an endoscope insertion part (300), and an endoscope (100). The bending portion (1) of the endoscope insertion part comprises a strip-shaped body (10) extending along a first direction. The body (10) has a cross-sectional profile having 6-12 sides in the first direction; the body (10) is provided with multiple through holes (11) extending in the first direction and running through the body; the body (10) is provided with multiple V-shaped grooves (111a) arranged along the first direction and opening towards a second direction, the second direction being perpendicular to the first direction.

Description

Bending part of endoscope insertion part, endoscope insertion part and endoscope

related application

This application claims the priority of the Chinese patent application filed on November 16, 2021, with the application number 202111354645.1, and the title of the invention is "the bending part of the endoscope insertion part, the endoscope insertion part and the endoscope"; 2021 Applied on November 16, the application number is 202122803514.9, and the invention title is the priority of the Chinese patent application entitled "Bending part of endoscope insertion part, endoscope insertion part and endoscope"; application on November 16, 2021 , the application number is 202111355715.5, the priority of the Chinese patent application titled "the bending part of the endoscope insertion part, the endoscope insertion part and the endoscope"; and the application on November 16, 2021, the application number It is the priority of the Chinese patent application 202122803494.5 with the title of "bending part of endoscope insertion part, endoscope insertion part and endoscope", the entire content of which is incorporated in this application by reference.

technical field

The present application relates to the field of medical devices, in particular to a bending portion of an endoscope insertion part, an endoscope insertion part and an endoscope.

Background technique

An endoscope is a common medical instrument, consisting of an operation part and an insertion part. The insertion part is located at the far end of the operation part, and is used to enter the human body through the natural orifice of the human body or through an incision formed by surgery. The insertion part includes a front end and a bending part in order from far to near, and an observation mirror is arranged on the front end. The bending part can be bent according to the control of the operating part, so as to change the observation direction of the observation mirror or change the direction in which the surgical instrument protrudes from the surgical instrument channel or the working channel.

At present, the bending part generally adopts a split snake bone structure, that is, multiple tube sections are connected in sequence and can rotate at a certain angle with each other, and the traction wire passes through each tube section to control the bending of the bending part so that the doctor can observe the relevant parts. This structure is often too complex in structure and high in production cost.

Therefore, a single-piece or one-piece bending part has appeared.

The device for internal imaging in the related art includes a handpiece, and a connecting pipe extending from the proximal end of the handpiece, and the connecting pipe may include a single flexible or deformable support structure. The monolithic support structure has a series of offset ring segments of a first set of segments and a second set of segments offset approximately 90 degrees from the first set of segments, the first set of segments and the second set of segments The two sets of segments are connected by pairs of flexure bridges that generally allow flexure in at least one direction, so that the support structure can be manipulated in two dimensions by pulling and/or pushing on appropriate guy wires , to achieve the bending of the connecting pipe.

The endoscope bending part in the related art includes a snake bone body; wherein the snake bone body includes a first side and a second side; the first side is opposite to the second side, and the first side is opposite to the second side The second side is provided with a plurality of first grooves arranged in sequence along the axial direction. The snake bone body is provided with a number of first through holes and traction holes axially penetrating through the snake bone body, and a first shaft. To the rigid support member and the first support member installation hole, the first support member installation hole axially penetrates the inside of the serpentine body, and the first axial rigid support member is arranged in the first support member installation hole, so as to The snake bone body is prevented from being deformed in the axial direction, which is convenient for use.

However, in the related art, there is often a certain deviation between the actual bending direction and the expected bending orientation of the components that realize the bending function in the working state, or the structure is complex and the production cost is high.

Contents of the invention

According to various embodiments of the first aspect of the present application, there is provided a curved portion of an endoscope insertion portion, comprising a strip-shaped body extending along a first direction, and the cross-sectional outer profile of the body in the first direction is 6- 12-sided shape, the body is provided with a plurality of through holes extending along the first direction and passing through the body, and the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening toward the second direction, the second direction is perpendicular to first direction.

In one embodiment, the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening toward the third direction, and the third direction is perpendicular to the second direction and the first direction at the same time.

In one embodiment, the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening toward the opposite direction of the second direction and/or toward the opposite direction of the third direction.

In one embodiment, a V-shaped groove facing the second direction is opposite to a V-shaped groove facing the opposite direction of the second direction to form a first V-shaped groove group; a V-shaped groove facing the third direction is connected to a V-shaped groove facing the second direction. The V-shaped grooves facing the direction opposite to the third direction are oppositely arranged to form a second V-shaped groove group. Optionally, the interval between two V-shaped grooves with opposite opening directions of the first V-shaped groove group, and/or, the interval between two V-shaped grooves with opposite opening directions of the second V-shaped groove group is 0.3 -0.9mm.

In one embodiment, the first V-shaped groove set and the second V-shaped groove set are arranged at intervals along the first direction.

In one embodiment, the maximum opening angle of the V-shaped groove is 3.75 times the diameter in millimeters of the circumscribed circle of the cross section of the body.

In one embodiment, the through holes include a working channel through hole, an auxiliary channel through hole and a harness channel through hole.

In one embodiment, the harness channel through holes provide paths for pull wires, optical fibers and electrical wires; the working channel through holes provide paths for working channel tubing. Optionally, the auxiliary channel through-hole provides a path for water pipe or air pipe.

In one embodiment, the curved portion of the endoscope insertion portion is integrally injection molded.

In one embodiment, the material of the curved part of the endoscope insertion part is one of silicone rubber, TPE, TPU, PVC and PP.

In one embodiment, from the proximal end of the curved portion to the distal end of the curved portion, the opening angle of the V-shaped groove increases sequentially.

In one embodiment, the minimum opening angle of the V-shaped groove is 10 degrees.

The present application also provides an endoscope insertion part, including the above-mentioned curved part of the endoscope insertion part.

In one embodiment, a pulling wire connecting the distal end of the bending part and the operating part of the endoscope is provided in the through hole of the wire harness channel, and the pulling wire is used to control the bending of the bending part according to the action of the operating part; The part between the V-shaped grooves defines a condyle, and every two condyles are separated from each other.

The present application also provides an endoscope, including the above-mentioned endoscope insertion part.

According to various embodiments of the second aspect of the present application, there is provided a curved portion of the insertion portion of the endoscope, comprising a strip-shaped body extending along the first direction, and a plurality of holes extending along the first direction and penetrating the body are provided in the body. A through hole, the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening towards the second direction, the second direction is perpendicular to the first direction, wherein, the area where the V-shaped grooves are arranged on the outside of the body is provided with The groove has a flat bottom surface, so that the outer edge of the side wall of the V-shaped groove forms a straight edge.

In one embodiment, there are multiple grooves along the circumferential direction of the body, so that the outer edge of the side wall of the V-shaped groove forms a folding line edge composed of straight sides.

In one embodiment, the V-shaped groove and the groove form a V-shaped groove area, and the body is provided with a plurality of V-shaped groove areas arranged along the first direction and opening toward the third direction, and the third direction is perpendicular to the second direction at the same time. direction and first direction.

In one embodiment, a V-shaped groove area facing the second direction is opposite to a V-shaped groove area facing the opposite direction of the second direction, forming a first V-shaped groove area group; a V-shaped groove area facing the third direction The groove area is opposite to a V-shaped groove area facing the direction opposite to the third direction, forming a second V-shaped groove area group.

In one embodiment, the projection of the outer edge of the V-shaped groove of a first V-shaped groove block group or a second V-shaped groove block group on a reference plane perpendicular to the first direction is a 6-12 polygon.

In one embodiment, there is an interval between two V-shaped grooves with opposite opening directions of the first V-shaped groove group, and/or, between two V-shaped grooves with opposite opening directions of the second V-shaped groove group. The interval is 0.3-0.9 mm.

In one embodiment, the first V-shaped groove group and the second V-shaped groove group are arranged at intervals along the first direction.

In one embodiment, the maximum opening angle of the V-shaped groove is 3.75 times the diameter in millimeters of the circumscribed circle of the cross-section of the outer edge of the V-shaped groove of the V-shaped groove block group.

In one embodiment, a rib extending along the first direction is provided on the outer periphery of the bending portion body.

In one embodiment, it also includes: a protective sleeve, which is used to be sleeved on the outside of the bending part; a working channel pipeline placed in the through hole of the working channel, and the material of the working channel pipeline is PVC, TPE, PTFE and TPU A water pipe or air pipe placed in the through hole of the auxiliary channel, the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present application will be apparent from the description, drawings and claims.

Description of drawings

In order to better describe and illustrate embodiments and/or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. Additional details or examples used to describe the drawings should not be considered limitations on the scope of any of the disclosed inventions, the presently described embodiments and/or examples, and the best mode of these inventions currently understood.

FIG. 1 illustrates a perspective view of a structure of a curved portion of an insertion portion of an endoscope according to one or more embodiments.

FIG. 2 illustrates a bottom view of a structure of a curved portion of an insertion portion of an endoscope according to one or more embodiments.

Figure 3 illustrates a front view of a bend structure provided in accordance with one or more embodiments.

FIG. 4 illustrates a left side view of a structure of a bending portion according to one or more embodiments.

Fig. 5 shows a sectional view along A-A in Fig. 2 and Fig. 4 .

FIG. 6 is a schematic diagram of force acting on the edge of the side wall of the notch or the groove when the bending part is bent in the related art.

Fig. 7 is a schematic diagram of force acting on the edge of the side wall of the V-shaped groove when the bending part is bent according to one or more embodiments.

FIG. 8 illustrates a front view of a partial structure of a curved portion of an insertion portion of an endoscope according to one or more embodiments.

FIG. 9 shows a top view of the structure shown in FIG. 8 .

FIG. 10 shows a cross-sectional view along B-B of FIG. 9 .

Fig. 11 is a structural perspective view of an endoscope according to one or more embodiments.

Fig. 12 is a perspective view of an internal structure of an operating portion of an endoscope according to one or more embodiments.

FIG. 13 is a partially enlarged schematic view at point C in FIG. 12 .

Detailed ways

The implementation of the present application will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Although the description of the present application will be introduced in conjunction with a preferred embodiment, it does not mean that the features of the invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the present application. The following description contains numerous specific details in order to provide an in-depth understanding of the present application. The application may also be practiced without these details. Furthermore, some specific details will be omitted from the description in order to avoid obscuring or obscuring the focus of the application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

It should be noted that in this specification, similar numerals and letters denote similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be identified in subsequent drawings. for further definition and explanation.

In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the term "upper" is based on the orientation or positional relationship shown in the drawings, or the orientation or position that the inventive product is usually placed in use. The relationship is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

In the description of this embodiment, it should be noted that the terms "near" and "far" are relative positional relationships. When the operator operates a device to process the target object, along the device, the side close to the operator is "Near", the side closer to the target object is "Far".

The terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of this embodiment, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "connecting" and "connecting" should be understood in a broad sense, for example, it can be a fixed connection or a A detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be an internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this embodiment in specific situations.

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manner of the present application will be further described in detail below in conjunction with the accompanying drawings.

Electronic endoscopy (endoscopy) is a medical electronic optical instrument that can be inserted into the human body cavity and viscera cavity for direct observation, diagnosis and treatment, integrating light, mechanics, electricity and other technologies. It uses extremely small electronic imaging components to image the object in the cavity to be observed through a tiny objective lens optical system, then sends the received image signal to the image processing system, and finally outputs the processed image on the monitor for doctors Observation and diagnosis. Electronic endoscopes are divided into electronic gastroscopes, electronic duodenoscopes, and electronic colonoscopes.

With the development of endoscopic minimally invasive diagnosis and treatment technology, many diseases can be effectively treated on the basis of organ preservation. Appendectomy has always been the main method for the treatment of acute appendicitis. Inspired by ERCP (Endoscopic Retrograde Cholangiopancreatography, Endoscopic Retrograde Cholangiopancreatography) in the treatment of acute obstructive suppurative cholangitis, in recent years Endoscopic Retrograde Appendicitis Therapy (Endoscopic Retrograde Appendicitis Therapy) , ERAT) was proposed. Compared with traditional treatment methods, ERAT can quickly relieve symptoms, reduce the chance of recurrence, avoid the impact of long-term use of antibiotics on intestinal flora, avoid surgical trauma, preserve appendix function, and improve quality of life. In short, ERAT can directly observe the shape of the opening of the appendix through colonoscopy, confirm the diagnosis of appendicitis, and use ERCP-related catheter guide wire technology to perform operations such as intubation, suction decompression, angiography, flushing, and stent drainage of the appendix lumen. .

After the ERAT diagnosis and treatment technique was proposed, the industry gradually realized that ERAT can diagnose, lavage, remove stones, place stents and other treatments for appendicitis using radiographic technology, but it cannot directly view the image of the appendix cavity, and cannot completely rule out the tumor in the appendix cavity However, it is still not possible to achieve accurate extraction of appendix coprolites. Therefore, some scholars proposed that on the basis of the principle of ERAT, a single-use electronic endoscope should be used to pass through the working channel of the colonoscope and enter the appendix cavity to carry out diagnosis and treatment activities. For a clear definition, this application defines the above-mentioned single-use electronic endoscope for ERAT as a single-use electronic appendix endoscope, referred to as appendix or appendix endoscope.

However, the appendix is located at the lower right of the human abdomen, between the cecum and the ileum. It is a slender and curved blind tube. Its root is connected to the posteromedial wall of the cecum. any direction in the abdominal cavity. According to published literature, the opening of the appendix is often covered by Gerlach's valve, which makes intubation difficult. Among the various steps of ERAT, intubation is the most difficult and the most critical step. There are two reasons: first, the position of the appendix varies a lot, and the internal opening of the appendix is not necessarily at the position facing the endoscope; The colonoscope does not have a lifter, and the direction of the catheter cannot be adjusted by the lifter after the catheter extends out of the endoscopic end during intubation. The bending part and the corresponding insertion part provided by the present application have a large bending angle, and the manipulation force required to form a large bending angle is small, which can be completely applied to an appendoscope and is beneficial to solve the above-mentioned problem of difficult intubation.

In the related art, electronic endoscopes including the above-mentioned appendoscope usually include an operation part and an elongated insertion part positioned at the distal end side of the operation part. Bending in different directions, the observation optical system located on the distal end surface of the insertion part obtains images of the desired observation site, and the operator can perform observation, diagnosis, photography, treatment, etc. based on this. That is to say, when used as the bending part of the insertion part of the endoscope, the distal end of the bending part is provided with an observation optical system, and the proximal end is connected with other parts of the insertion part, and is controlled by the operation part to realize bending.

The inventor found that in the related art, the reason why the bending part deviates from the expected bending orientation in the working state is because the cross section of the bending part body is often circular or ring-shaped. In actual use, it is pulled by the pulling wire, When the bending part is bent, it is actually accompanied by a rotation in the circumferential direction, which can also be called twisting or twisting, which affects the desired bending orientation of the bending part. The split snake bone structure is less twisted because the mutual rotation angles are restricted between the pipe joints, but the split snake bone structure is complicated and the production cost is high; the one-piece snake bone structure usually has the above-mentioned obvious Problem with inaccurate bend orientation.

According to the specific implementation manner of the first aspect of the present application, Fig. 1 shows a perspective view of the structure of the bending part of the insertion part of the endoscope provided by an embodiment of the first aspect of the present application. As shown in FIG. 1 , the present application provides a bending part 1 of an endoscope insertion part, including a strip-shaped body 10 extending along a first direction X, and the cross-sectional outer profile of the body 10 in the first direction X is 6 - a 12-sided shape (as an example, shown as a 12-sided shape in Figures 1 to 5), the body 10 is provided with a plurality of through holes 11 extending along the first direction X and passing through the body 10, and the body 10 is provided with a plurality of The V-shaped grooves 111 a are arranged along the first direction X and open toward the second direction Y, and the second direction Y is perpendicular to the first direction X.

By adopting the above technical solution, the cross-sectional outer contour of the body 10 in the first direction is set to be 6-12 polygonal, so that the bending part of the endoscope insertion part provided by the application is not easy to be twisted when it is controlled to bend; through V Compared with other shapes, the setting of the shaped groove further strengthens the above-mentioned beneficial effect of not being easily twisted.

In the related art, the cross-section of the curved part of the endoscope insertion tube is generally designed to be circular or annular, that is, it appears as a cylinder in a relaxed state (not pulled by the pulling wire). When the insertion part enters the human body cavity and other places that need to be observed, the bending part is pulled by the pulling wire and bends. At this time, the bending is often accompanied by rotation in the circumferential direction, that is, twisting or twisting, which affects the reach of the bending part. Desired bending orientation, which deviates the viewing angle. The reason is that, as shown in Figure 6, when the substantially cylindrical curved portion of the related art is bent, the two oppositely arranged surfaces of the scallop or groove fit together, and at this time, the two mutually fitted surfaces The edge is rounded, which means that the force at each point on the edge of the opposite surface is basically the same; in addition, in order to make the bending part not only easy to realize bending, but also to restore the original shape when it is no longer pulled by the pulling line, the bending The parts are often made of elastic material. This leads to the fact that the curved portion provided by the related art is prone to rotate in the circumferential direction when it is bent, that is to say twisted. However, by adopting the above-mentioned technical solution of the present application, the cross-sectional outer contour of the main body 10 in the first direction is set to be 6-12 polygonal, so that the bending part 1 of the endoscope insertion part provided by the present application is bent in the second direction Y 7, the opposite side wall edges of the V-shaped groove are folded straight sides. When the V-shaped groove provided by the embodiment of the application follows the bending of the bending part 1, the opposite side walls of the V-shaped groove fit together. At the same time, the force on the edge of the side wall is not uniform in the circumferential direction, that is, the force at the corner is different from that at the straight edge, so that the bending part 1 can be prevented from rotating in the circumferential direction to a certain extent when it is bent. However, if the cross-sectional outer profile of the body 10 in the first direction is set as a polygon with sides less than 6, it will affect the bending flexibility of the bending part 1 and reduce the number and size of the through holes 11 that the body 10 can accommodate. ; and the anti-distortion performance will also decrease with the increase of the number of sides. Therefore, after trial and error, it is appropriate to set the number of sides of the polygon between 6-12.

In addition, the V-shaped configuration of the V-shaped groove means that the bottom of the groove is linear, so that when the curved part is bent and the opposite side walls of the groove are attached, the area where the two side walls are attached to each other is larger. Compared with the U-shaped groove or the non-linear bottom arrangement in the related art, such an arrangement is also helpful for realizing the effect of anti-distortion.

In addition, since the bending part 1 is a part of the insertion part, and the insertion part needs to be inserted into a human body or a narrow environment, the bending part often needs to be provided with a protective cover outside. Setting the outer contour of the bending part body 10 as a polygon, compared with the circular shape in the related art, is also conducive to axial penetration of the protective sleeve at the bending part. Those skilled in the art can understand that this is because the contact area between the outside of the curved part 1 and the inside of the protective cover is reduced; a gap is left between the straight sides of the polygon and the inner wall of the protective cover that is usually circular, which is also beneficial to the bending part 1. Thread the protective sleeve axially. The above effects are particularly obvious when both the protective cover and the bending portion 1 are made of elastic materials. Most importantly, the above technical solution has a simple structure and can be manufactured at low cost.

Fig. 2 shows a bottom view of the structure of the curved portion of the insertion portion of the endoscope provided by an embodiment of the first aspect of the present application, that is, a viewing angle along the Y direction. Fig. 3 shows a front view of the bending part structure provided by an embodiment of the first aspect of the present application, that is, a viewing angle along the Z' direction. Fig. 4 shows a left view of the bending part structure provided by an embodiment of the first aspect of the present application. Fig. 5 shows a sectional view along A-A in Fig. 2 and Fig. 4 . As shown in Figures 1 to 5, the body 10 is provided with a plurality of V-shaped grooves 112a arranged along the first direction X and opening toward the third direction Z, and the third direction Z is perpendicular to the second direction Y and the first direction at the same time. Direction X. The main body 10 is also provided with a plurality of V-shaped grooves 111b arranged along the first direction X and opening toward the opposite direction Y' of the second direction Y, and/or V-shaped grooves 111b opening toward the opposite direction Z' of the third direction Z. shaped groove 112b.

Continuing to refer to FIG. 1 to FIG. 5, a V-shaped groove 111a facing the second direction Y is opposite to a V-shaped groove 111b facing the opposite direction Y' of the second direction Y, forming a first V-shaped groove group 111; The V-shaped groove 112 a in the third direction Z is opposite to a V-shaped groove 112 b facing in the opposite direction Z′ of the third direction Z, forming a second V-shaped groove group 112 . The relative setting means that the axial positions of the V-shaped groove 111a and the V-shaped groove 111b in the first direction X are basically the same, in other words, the distance between the V-shaped groove 111a and the V-shaped groove 111b from one end of the bending part 1 is the same, so that During the bending process of the bending part 1, when one of the V-shaped

grooves

111a and 111b is closed, the other V-shaped groove is further opened, which is beneficial to ensure that the bending part 1 remains stable during the bending process.

Continuing to refer to FIG. 1 , the first V-shaped groove group 111 and the second V-shaped groove group 112 are arranged at intervals along the first direction X, which is beneficial to ensure that the bending part 1 is in the second direction Y, the opposite direction Y' of the second direction, When bending in the third direction Z or the opposite direction Z' of the third direction, the normal bending and structural stability of the bending part 1 are achieved. In another embodiment of the present application, the interval d between two V-shaped grooves with opposite opening directions in the first V-shaped groove group 111 and/or the second V-shaped groove group 112 is 0.3-0.9 millimeters (as shown in FIG. 2 and Figure 3), to ensure that the bending part 1 has enough bending times.

The diameter of the circumscribed circle of the cross section of the body 10 of the bending part 1 is approximately 12 millimeters. With reference to FIG. 2, in the embodiment of the application, the maximum opening angle of the V-shaped groove is 45 degrees. After testing and comparison, it is found that based on the For the structure and material of each component in the embodiment, a larger opening angle is not conducive to the accurate control of the bending angle, and has an adverse effect on the anti-twisting performance; the minimum opening angle of the V-shaped groove is 10 degrees, based on each of the embodiments provided by the application. Due to the combination of component structure and material, a smaller opening angle is difficult to provide the required degree of bending, that is, the angle at which the bending part is controlled to bend in the axial direction. Those skilled in the art can understand that the opening angle of the above-mentioned V-shaped groove is directly related to the diameter of the circumscribed circle of the cross section of the body 10 of the bending part 1, and the cooperation between the two directly affects the bending performance and anti-torsion performance of the bending part 1. According to the test, in order to ensure the above performance, the opening angle of the V-shaped groove is roughly linearly related to the diameter of the circumscribed circle of the cross-section of the body 10 of the bending part 1, that is, the maximum opening angle value of the V-shaped groove is the circumscribed circle of the cross-section of the body 10 of the bending part 1. The unit of circle diameter is 3.75 times the numerical value of millimeter.

As shown in Fig. 2 and Fig. 3, the opening angles α1, α2, α3 of the V-shaped grooves are at most 45 degrees and at least 10 degrees. Referring to FIG. 1 to FIG. 5 , in one embodiment of the present application, from the proximal end 12 to the distal end 13 of the curved portion 1 , the opening angle of the V-shaped groove gradually increases, ie α1<α2<α3. Wherein, α1 and α3 represent the opening angles of the V-shaped groove closest to the end of the bending part 1 respectively, and α2 represents the opening angle of the V-shaped groove not closest to the end of the bending part 1 .

However, the above-mentioned maximum opening angle and minimum opening angle of the V-shaped groove need not be satisfied at the same time. Especially the minimum opening angle can be adjusted as needed.

As shown in FIGS. 4 , 11 - 13 , the through holes 11 may include a working channel through hole 14 , an auxiliary channel through hole 15 or a harness channel through hole 16 . The harness passage through hole 16 may include sub-holes 16a, 16b, 16c to provide paths for pull wires 16a', optical fibers and electrical wires, respectively. The function of the pulling wire 16a' is to control the bending of the bending part 1 according to the operation of the operating part 200. Specifically, one end of the pulling wire 16a' may be fixed to the operating part 200, and the other end of the pulling wire 16a' may be fixed to the bending part after passing through the proximal end of the bending part 1. 1, the pulling wire 16a' can be pulled and loosened by the operating part 200 to drive the head end of the bending part 1 to be pulled and loosened, so as to realize the bending control of the bending part 1 of the insertion part; the optical fiber can pass through The light from the external light source is transmitted to the required position to provide illumination for the process of inserting the endoscope into the human cavity and observing; the wire can be a camera cable that transmits electronic data, or a cable that transmits a large current. The working channel through hole 14 provides a path for the working channel pipeline, and the material of the working channel pipeline can be PVC (Chinese name: polyvinyl chloride), TPE (Chinese name: thermoplastic elastomer), PTFE (Chinese name: polytetrafluoroethylene) And one of TPU (Chinese name: thermoplastic polyurethane elastomer). Auxiliary channel through hole 15 provides path for water pipe or air pipe, and the material of water pipe or air pipe can be PVC (Chinese name: polyvinyl chloride), TPE (Chinese name: thermoplastic elastomer), PTFE (Chinese name: polytetrafluoroethylene) and One of TPU (Chinese name: thermoplastic polyurethane elastomer). The material of the water pipe or air pipe, the material of the working channel pipeline and the material of the bending part 1 body 10 can cooperate with each other, and the required manipulation strength, bending angle and bending stability can be further controlled through the mutual deployment of the two materials sex. In the embodiment of the present application, the material of the bending part 1 body 10 can be silicone rubber, TPE (Chinese name: thermoplastic elastomer), TPU (Chinese name: thermoplastic polyurethane elastomer), PVC (Chinese name: polyvinyl chloride) and One of PP (Chinese name: polypropylene).

The selection of the above materials is suitable for the integrated arrangement of the bending part 1, and is also suitable for the non-integrated arrangement, that is, the selection of the above materials helps to strengthen the friction between the joints 20 when the joints 20 are separated from each other, so that when After the separated joints 20 are bent with each other, due to the frictional interaction between the joints 20 and the axial pressure formed by the traction wire on the joints 20, the parts in contact with each other can keep their relative positions unchanged, so the reduction can be achieved smoothly.

Optionally, the subhole 16a is provided with a pulling wire 16a' connecting the distal end 13 of the bending part 1 and the operating part 200 of the endoscope, and the pulling wire 16a' is used to control the bending of the bending part 1 according to the action of the operating part 200; The part between two adjacent V-shaped grooves is defined as a joint 20 , and every two joints 20 are separated from each other.

In this way, the pulling wire 16a' passes through the joints 20 of the bending part 1 one by one along the sub-hole 16a of the wire harness channel 16, and connects the joints 20 together, and the joints 20 are separated or disconnected (that is, not a whole) , but are kept in contact by the connecting effect of the pulling wire 16a'. When the bending part 1 is pulled by the traction wire 16a', it bends. Since the joints 20 are separated from each other, they are integrally connected with each other, which reduces the mutual bending constraints and is beneficial to the bending part 1. A larger bending angle is realized; and while a larger bending angle is realized, the pulling force required by the pulling wire 16a' can also be smaller.

Although the joints 20 are separated or disconnected from each other, due to the friction force between the joints 20 and the connection effect of the traction line 16a', the bending part 1 can still return to the shape before bending after bending. Moreover, as the outer side of the bending part 1 of the endoscope, a protective cover is also provided, and the protective cover also helps the recovery of the shape of the bending part 1 .

In the related art, the curved part of the insertion part of the endoscope is split, and a plurality of metal pipe sections are connected in sequence, or the metal pipes are carved, and the assembly process is complicated and the cost is high. The bending part 1 of the endoscope insertion part provided by the present application is integrally injection-molded, which reduces the assembly of components and reduces the production cost.

The first aspect of the present application also provides an endoscope insertion part 300, which includes the bending part 1 of the endoscope insertion part 300 described in the above embodiment, and further includes: a protective sleeve, which is used to be sleeved on the bending part 1; the working channel pipeline placed in the through hole 14 of the working channel, the material of the working channel pipeline is one of PVC, TPE, PTFE and TPU; placed in the auxiliary channel through hole 15 The water pipe or air pipe inside, the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.

As shown in FIGS. 11-13 , the first aspect of the present application also provides an endoscope 100 , including the above-mentioned endoscope insertion portion 300 , which has a simple structure and can be manufactured at low cost.

According to the specific implementation of the second aspect of the application, the embodiment of the application discloses a bending part 1 of the insertion part of the endoscope, including a strip-shaped body 10 extending along the first direction X, and inside the body 10 is a A direction X extends through a plurality of through holes 11 of the body 10. The body 10 is provided with a plurality of V-shaped grooves 111a arranged along the first direction X and opening toward the second direction Y. The second direction Y is perpendicular to the first direction Y. Direction X, wherein, as shown in Figure 8, the region where the V-shaped groove 111a is provided on the outside of the body 10 is provided with a groove 17' having a flat bottom surface 17, so that the side wall outer edge 18 of the V-shaped groove 111a forms a straight edge .

By adopting the above-mentioned technical scheme, the straight-edge structure is formed by the outer edge 18 of the side wall of the V-shaped groove 111a, so that the bending part 1 of the insertion part of the endoscope provided by the application is not easily twisted when it is controlled to bend; through the V-shaped groove 111a Compared with other shapes, the setting of further strengthens the above-mentioned beneficial effect that distortion is not easy to occur.

In other embodiments, multiple grooves 17' are provided along the circumferential direction of the body 10, so that the outer edge 18 of the side wall of the V-shaped groove 111a forms a folding line edge composed of straight sides.

As described above for the specific implementation of the first aspect of the present application, in the specific implementation of the second aspect of the present application, compared to the related art, it can still be realized that when the bending part 1 bends to the second direction Y, due to the V-shaped The outer edge 18 of the opposite side wall of the groove 111a is a straight edge, or further a straight edge forming a fold line, which can prevent the bending part 1 from rotating in the circumferential direction during bending to a certain extent.

For the convenience of expression, the V-shaped groove and the groove are defined as the V-shaped groove area. The body 10 may be provided with a plurality of V-shaped groove areas 112a' arranged along the first direction X and opening toward the third direction Z (as shown in FIG. 2 , the plane bottom surface 17 is not shown in the figure), and the third direction Z is perpendicular to the second direction Y and the first direction X at the same time. The body 10 may also be provided with a plurality of V-shaped groove areas 111b' arranged along the first direction X and opening toward the opposite direction Y' of the second direction Y (as shown in FIG. 3 , the plane bottom surface 17 is not shown in the figure. out), and/or the V-shaped groove area 112b' opening toward the direction Z' opposite to the third direction Z (as shown in FIG. 2 , the plane bottom surface 17 is not shown in the figure).

As shown in Figure 1, a V-shaped groove area 111a' facing the second direction Y and a V-shaped groove area 111b' facing the opposite direction Y' of the second direction Y are arranged opposite to form a first V-shaped groove area group 111'. Correspondingly, a V-shaped groove area 112a' facing the third direction Z can be arranged opposite to a V-shaped groove area 112b' facing the opposite direction Z' of the third direction Z, forming a second V-shaped groove area group 112' .

In another embodiment, the V-shaped groove side wall outer edge 18 of a first V-shaped groove area group 111' or a second V-shaped groove area group 112' can be on a reference plane perpendicular to the first direction X The projection is 6-12 polygons. The beneficial effect of such setting is as described in the specific implementation manner of the first aspect of the present application.

In another embodiment, the interval d between the two V-shaped grooves with opposite opening directions in the first V-shaped groove group 111' and/or the second V-shaped groove group 112' is 0.3-0.9 mm (as shown in Figure 2 and Figure 3), to ensure the bending times of the bending part 1. The first V-shaped groove group 111' and the second V-shaped groove group 112' are arranged at intervals along the first direction X. The maximum opening angle of the V-shaped groove area is 3.75 times the diameter of the circumscribed circle in millimeters of the outer edge 18 of the V-shaped groove side wall of the V-shaped groove area group.

As shown in FIGS. 4 and 5 , the through holes 11 may include a working channel through hole 14 , an auxiliary channel through hole 15 and a harness channel through hole 16 .

Optionally, the sub-hole 16a of the harness channel through hole 16 is provided with a pulling wire 16a' connecting the distal end 13 of the bending part 1 and the operating part 200 of the endoscope, and the pulling wire 16a' is used to control the The bending of the bending part 1 ; the part between two adjacent V-shaped grooves is defined as a joint 20 , and every two joints 20 are separated from each other.

In this way, the pulling wire 16a' passes through each condyle 20 of the bending part 1 one by one along the wire harness channel, and connects each condyle 20 together. 16a' connection to maintain contact. When the bending part 1 is pulled by the traction wire 16a', bending occurs, the condyles 20 are separated from each other, and compared with the condyles 20, they are integrally connected to each other, which reduces the mutual constraints and is beneficial to the bending part 1 to achieve more Large-angle bending; and while achieving a larger bending angle, the pulling force required by the pulling wire 16a' can also be smaller.

Although the joints 20 are separated or disconnected from each other, due to the friction force between the joints 20 and the connection effect of the traction line 16a', the bending part 1 can still return to the shape before bending after bending. In addition, a protective cover is provided on the outside of the bending part 1 of the endoscope, and the protective cover also helps to restore the shape of the bending part 1 .

In one embodiment, as shown in FIGS. 8-10 , a rib 19 extending along the first direction X is provided on the outer periphery of the body 10 of the bending part 1 . In other embodiments, it may also be a bump, a bump, etc. arranged along the first direction X, or a groove extending along the first direction X (different from the aforementioned groove 17'). As mentioned above, such arrangement is beneficial to insert the bending part 1 into the protective sheath along the axial direction (ie, the first direction X) more quickly.

Similar to the first aspect of the present application, the curved portion 1 of the insertion portion of the endoscope can be integrally injection molded. The material of the bending part 1 of the insertion part of the endoscope can be one of silicone rubber, TPE, TPU, PVC and PP. From the proximal end 12 of the curved part 1 to the distal end 13 of the curved part 1, the opening angle of the V-shaped groove can be set to increase sequentially. When the joints 20 are separated from each other, the above material pair helps to strengthen the friction between the joints 20, so that when the separated joints 20 are bent, due to the interaction of the friction force between the joints 20, the pulling wire will The axial pressure formed by the condyle 20 can keep the relative position of the parts in contact with each other unchanged, so the reduction can be smoothly realized.

The second aspect of the present application further provides an endoscope insertion part 300, including the above-mentioned bending part 1 of the endoscope insertion part. The bending part 1 can also include: a protective sleeve, which is used to be sleeved on the outside of the bending part 1; a working channel pipeline placed in the working channel through hole 14, and the material of the working channel pipeline is PVC, TPE, PTFE and TPU One of them; the water pipe or air pipe placed in the through hole 15 of the auxiliary channel, the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.

In one embodiment, a pulling wire 16a' connecting the distal end 13 of the bending part 1 and the operating part 200 of the endoscope is provided in the through hole 16 of the wire harness channel, and the pulling wire 16a' is used to control the bending part according to the action of the operating part 200 1; the part between two adjacent V-shaped grooves is defined as a joint 20, and every two joints 20 are separated from each other.

As shown in FIGS. 11-13 , the second aspect of the present application further provides an endoscope 100 , including the above-mentioned endoscope insertion part 300 .

Although the application has been illustrated and described by referring to some preferred implementations of the application, those of ordinary skill in the art should understand that the above content is a further detailed description of the application in conjunction with specific implementations, and cannot be deemed The specific implementation of the application is limited only by these descriptions. Those skilled in the art may make various changes in form and details, including some simple deduction or substitution, without departing from the spirit and scope of the application.

Claims

A bending part of an endoscope insertion part, comprising a strip-shaped body extending along a first direction, the cross-sectional outer contour of the body in the first direction is 6-12 polygonal, and the body is provided with A plurality of through holes extending along the first direction and passing through the body, the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening toward the second direction, the second direction perpendicular to the first direction.
The bending part of the endoscope insertion part according to claim 1, wherein the body is provided with a plurality of V-shaped grooves arranged along the first direction and opening toward a third direction, and the third direction At the same time, it is perpendicular to the second direction and the first direction.
The bending part of the insertion part of the endoscope according to claim 2, wherein, the body is provided with a plurality of objects arranged along the first direction and facing the opposite direction of the second direction and/or facing the A V-shaped groove opening in the opposite direction of the third direction.
The bending portion of the insertion portion of an endoscope according to claim 3, wherein one of the V-shaped grooves facing the second direction is opposite to one of the V-shaped grooves facing the opposite direction of the second direction , forming a first V-shaped groove group; one of the V-shaped grooves facing the third direction is opposite to the V-shaped groove facing the opposite direction of the third direction, forming a second V-shaped groove group, The first V-shaped groove group and the second V-shaped groove group are arranged at intervals along the first direction.
A bending part of an endoscope insertion part, comprising a strip-shaped body extending along a first direction, the body is provided with a plurality of through holes extending along the first direction and passing through the body, the body is There are a plurality of V-shaped grooves arranged along the first direction and opening toward a second direction, the second direction is perpendicular to the first direction, wherein the V-shaped grooves are arranged on the outer side of the body The region is provided with a groove with a flat bottom surface, so that the outer edge of the side wall of the V-shaped groove forms a straight edge.
The bending part of the endoscope insertion part according to claim 5, wherein, the V-shaped groove and the groove form a V-shaped groove area, and the body is provided with a plurality of and a V-shaped groove area opening toward a third direction, the third direction being perpendicular to the second direction and the first direction at the same time.
The bending part of the insertion part of the endoscope according to claim 6, wherein, the body is provided with a plurality of objects arranged along the first direction and facing the opposite direction of the second direction and/or facing the A V-shaped groove area opening in the direction opposite to the third direction.
The curved portion of the insertion portion of an endoscope according to claim 7, wherein one of said V-shaped groove regions facing said second direction and one said V-shaped groove region facing a direction opposite to said second direction Set oppositely to form a first V-shaped groove area group; one V-shaped groove area facing the third direction is opposite to the V-shaped groove area facing the opposite direction of the third direction to form a second V-shaped groove area. V-shaped groove group, the first V-shaped groove group and the second V-shaped groove group are arranged at intervals along the first direction.
The bending part of the endoscope insertion part according to claim 8, wherein, said V-shaped groove outer edge of one said first V-shaped groove block group or one said second V-shaped groove block block is perpendicular to The projection on the reference plane of the first direction is a 6-12 polygon.
The bending part of the insertion part of the endoscope according to claim 5, wherein the outer periphery of the main body is provided with ribs extending along the first direction.
An insertion part of an endoscope, comprising the bending part of the insertion part of an endoscope according to any one of claims 1-10.
The endoscope insertion part according to claim 11, wherein said through holes include a working channel through hole, an auxiliary channel through hole and a wire harness channel through hole, and said wire harness channel through hole is provided with a end and the traction line of the operating part of the endoscope, the traction line is used to control the bending of the bending part according to the action of the operating part; the part between two adjacent V-shaped grooves is defined as a condyle , every two joints are separated from each other.
The endoscope insertion part according to claim 11, wherein the curved part of the endoscope insertion part is integrally injection-molded.
The endoscope insertion part according to claim 11, wherein the material of the curved part of the endoscope insertion part is one of silicone rubber, TPE, TPU, PVC and PP.
The endoscope insertion portion according to claim 11, wherein an opening angle of the V-shaped groove increases sequentially from a proximal end of the curved portion to a distal end of the curved portion.
The endoscope insertion part according to claim 12, further comprising:

A protective sleeve is used to be sleeved on the outside of the curved portion;

The working channel pipeline placed in the through hole of the working channel, the material of the working channel pipeline is one of PVC, TPE, PTFE and TPU;

The water pipe or the air pipe placed in the through hole of the auxiliary channel, the material of the water pipe or the air pipe is one of PVC, TPE, PTFE and TPU.
An endoscope comprising the endoscope insertion portion according to any one of claims 11 to 16.