Bending section of endoscope insertion section, endoscope insertion section, and endoscope

Abstract

The present invention discloses a bending portion of an endoscope insertion portion, which includes a strip-shaped body extending in a first direction. A plurality of through holes extending in the first direction and penetrating the body are provided in the body. The body is provided with a plurality of V-shaped grooves arranged in the first direction and opening towards a second direction, and the second direction is perpendicular to the first direction. A groove with a flat bottom surface is provided in the area of the outer side of the body where the V-shaped grooves are provided, so that the outer edge of the side wall of the V-shaped groove forms a straight edge. Through the structural setting of forming a straight edge on the outer edge of the side wall of the V-shaped groove, when the bending portion of the endoscope insertion portion provided by the present invention is controlled to bend, it is not easy to be distorted; an endoscope insertion portion and an endoscope are also disclosed, and the structure is simple and can be manufactured at low cost.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a bending part of an endoscope insertion part, an endoscope insertion part and an endoscope. Background Art

[0002] An endoscope is a common medical device, which is composed of an operation part and an insertion part. The insertion part is arranged at the distal end of the operation part and is used to enter the human body through a natural orifice of the human body or through an incision formed by surgery. The insertion part successively includes a front end part and a bending part from far to near, and an observation mirror is arranged on the front end part. The bending part can be bent according to the control of the operation part, so as to change the observation direction of the observation mirror or change the direction in which a surgical instrument extends from a surgical instrument channel or a working channel.

[0003] At present, the bending part generally adopts a split snake bone structure, that is, a plurality of pipe joints are connected in sequence and can rotate relative to each other at a certain angle. By passing a traction wire through each pipe joint, the bending of the bending part is controlled so that a doctor can observe relevant parts. This structure is often too complex and has a high production cost.

[0004] Therefore, a monolithic or integral bending part has emerged.

[0005] Chinese Patent CN109963491A discloses a device and method for internal imaging. The device includes a handpiece and a connecting pipe extending from the proximal end of the handpiece. It is disclosed on page 7 of its specification that the connecting pipe may include a monolithic flexible or deformable support structure. The monolithic support structure has a series of offset annular 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 are connected by pairs of flexure bridges, and the flexure bridges generally allow flexure in at least one direction, so that the support structure can be manipulated in a two-dimensional direction by pulling and / or pushing appropriate pull wires to achieve the bending of the connecting pipe.

[0006] Chinese Patent CN205197941U discloses an endoscope bending part and a disposable endoscope, including a snake bone body; wherein the snake bone body includes a first side surface and a second side surface; the first side surface and the second side surface are opposite to each other, and a plurality of first grooves arranged in sequence along the axial direction are provided on both the first side surface and the second side surface. The snake bone body is internally provided with a plurality of first through holes and traction holes axially penetrating the snake bone body, as well as a first axial rigid support and a first support mounting hole. The first support mounting hole axially penetrates the inside of the snake bone body, and the first axial rigid support is arranged in the first support mounting hole to prevent the snake bone body from deforming in the axial direction and facilitate use.

[0007] However, for the existing components that implement the bending function, either the structure is complex and the production cost is high, or in actual use, it is found that there is often a certain deviation from the expected bending orientation. Summary of the Invention

[0008] The present invention provides a bending part of an endoscope insertion part, an endoscope insertion part and an endoscope, which can effectively control the bending orientation of the bending part at low cost.

[0009] The inventor found that in the prior art, the reason why the bending part deviates from the expected bending orientation in the working state is that the cross-section of the bending part body often adopts a circular or annular shape. In actual use, under the traction of the traction wire, the bending part bends, and actually rotates in the circumferential direction during bending, which is also called twisting or torsion. This affects the bending part to reach the expected bending orientation. The split snake bone structure has less twisting phenomenon because the rotation angle between the pipe joints is restricted, but the split snake bone structure is complex and the production cost is high; the integral snake bone structure usually has the above-mentioned problem of inaccurate bending orientation significantly.

[0010] According to the technical solution of the first aspect of the present invention, to solve the above technical problems:

[0011] An embodiment of the present invention discloses a bending part of an endoscope insertion part, including a strip-shaped body extending along a first direction. The outer contour of the cross-section of the body in the first direction is a 6-12-sided polygon. A plurality of through holes extending along the first direction and penetrating the body are provided in the body. A plurality of V-shaped grooves arranged along the first direction and opening towards a second direction are provided on the body, and the second direction is perpendicular to the first direction.

[0012] By adopting the above technical solution, through the setting that the outer contour of the cross-section of the body in the first direction is a 6-12-sided polygon, the bending part of the endoscope insertion part provided by the present invention is not easily twisted when being controlled to bend; through the setting of the V-shaped grooves, compared with other shapes, the beneficial effect of not being easily twisted is further strengthened.

[0013] Optionally, a plurality of V-shaped grooves arranged along the first direction and opening towards a third direction are provided on the body, and the third direction is perpendicular to both the second direction and the first direction at the same time.

[0014] Optionally, a plurality of V-shaped grooves arranged along the first direction and opening towards the opposite direction of the second direction and / or the opposite direction of the third direction are provided on the body.

[0015] Optionally, a V-shaped groove opening towards the second direction and a V-shaped groove opening towards the opposite direction of the second direction are oppositely arranged to form a first V-shaped groove group; a V-shaped groove opening towards the third direction and a V-shaped groove opening towards the opposite direction of the third direction are oppositely arranged to form a second V-shaped groove group.

[0016] Optionally, the distance between two V-grooves with opposite opening directions in the first V-groove group, and / or the distance between two V-grooves with opposite opening directions in the second V-groove group, is 0.3 - 0.9 mm.

[0017] Optionally, the first V-groove group and the second V-groove group are arranged at intervals along the first direction.

[0018] Optionally, the maximum opening angle degree of the V-groove is 3.75 times the diameter in millimeters of the circumscribed circle of the cross-section of the body.

[0019] Optionally, the through holes include a working channel through hole, an auxiliary channel through hole, and a wiring harness channel through hole.

[0020] Optionally, the wiring harness channel through hole provides a path for the traction wire, optical fiber, and electric wire; the working channel through hole provides a path for the working channel pipeline.

[0021] Optionally, the auxiliary channel through hole provides a path for the water pipe or air pipe.

[0022] Optionally, the bending part of the endoscope insertion part is integrally injection-molded.

[0023] Optionally, the material of the bending part of the endoscope insertion part is one of silicone rubber, TPE, TPU, PVC, and PP.

[0024] Optionally, from the proximal end to the distal end of the bending part, the opening angle of the V-groove increases in sequence.

[0025] Optionally, the minimum opening angle of the V-groove is 10 degrees.

[0026] The present invention also provides an endoscope insertion part, including the bending part of the above-mentioned endoscope insertion part.

[0027] Optionally, it further includes: a protective sleeve for sleeving outside the bending part; a working channel pipeline placed in the working channel through hole, and the material of the working channel pipeline is one of PVC, TPE, PTFE, and TPU; a water pipe or air pipe placed in the auxiliary channel through hole, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE, and TPU.

[0028] The present invention also provides an endoscope, including the above endoscope insertion part.

[0029] According to the technical solution of the second aspect of the present invention, to solve the above problems:

[0030] An embodiment of the present invention discloses a bending portion of an endoscope insertion portion, which includes a strip-shaped body extending in a first direction. A plurality of through holes extending in the first direction and penetrating the body are provided in the body. A plurality of V-shaped grooves arranged in the first direction and opening towards a second direction are provided on the body, and the second direction is perpendicular to the first direction. Among them, a groove with a flat bottom surface is provided in the area where the V-shaped grooves are arranged on the outer side of the body, so that the outer edges of the side walls of the V-shaped grooves form straight edges.

[0031] With the above technical solution, through the structural setting that the outer edges of the side walls of the V-shaped grooves form straight edges, when the bending portion of the endoscope insertion portion provided by the present invention is controlled to bend, it is not easy to be distorted; through the setting of the V-shaped grooves, compared with other shapes, the beneficial effect of not being easily distorted is further strengthened.

[0032] Optionally, there are a plurality of grooves along the circumferential direction of the body, so that the outer edges of the side walls of the V-shaped grooves form a broken line edge composed of straight edges.

[0033] Optionally, the V-shaped grooves and the grooves form a V-shaped groove area. A plurality of V-shaped groove areas arranged in the first direction and opening towards a third direction are provided on the body, and the third direction is perpendicular to both the second direction and the first direction at the same time.

[0034] Optionally, a plurality of V-shaped groove areas opening towards the opposite direction of the second direction and / or towards the opposite direction of the third direction are provided on the body.

[0035] Optionally, a V-shaped groove area opening towards the second direction and a V-shaped groove area opening towards the opposite direction of the second direction are arranged opposite to each other to form a first V-shaped groove area group; a V-shaped groove area opening towards the third direction and a V-shaped groove area opening towards the opposite direction of the third direction are arranged opposite to each other to form a second V-shaped groove area group.

[0036] Optionally, the projection of the outer edge of the V-shaped groove of a first V-shaped groove area group or a second V-shaped groove area group on a reference plane perpendicular to the first direction is a 6-12-sided polygon.

[0037] Optionally, the interval between two V-shaped grooves with opposite opening directions in the first V-shaped groove area group, and / or the interval between two V-shaped grooves with opposite opening directions in the second V-shaped groove area group, is 0.3-0.9 millimeters.

[0038] Optionally, the first V-shaped groove area group and the second V-shaped groove area group are arranged at intervals along the first direction.

[0039] Optionally, the maximum opening angle degree of the V-shaped groove is 3.75 times the millimeter number of the diameter of the circumscribed circle of the cross-section of the outer edge of the V-shaped groove of the V-shaped groove area group.

[0040] Optionally, the through holes include working channel through holes, auxiliary channel through holes, and wire harness channel through holes.

[0041] Optionally, a rib extending in the first direction is provided on the outer periphery of the bending portion body.

[0042] Optionally, the bending portion of the endoscope insertion portion is integrally injection-molded.

[0043] Optionally, the material of the bending portion of the endoscope insertion portion is one of silicone rubber, TPE, TPU, PVC, and PP.

[0044] Optionally, from the proximal end to the distal end of the bending portion, the opening angle of the V-shaped groove increases in sequence.

[0045] The present invention also provides an endoscope insertion portion, including the bending portion of the endoscope insertion portion described above.

[0046] Optionally, it further includes: a protective sleeve for sleeving outside the bending portion; a working channel pipeline placed in the through hole of the working channel, and the material of the working channel pipeline is one of PVC, TPE, PTFE, and TPU; a water pipe or an air pipe placed in the through hole of the auxiliary channel, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE, and TPU.

[0047] The present invention also provides an endoscope, including the above endoscope insertion portion. Description of the Drawings

[0048] Figure 1 A perspective view showing the structure of the bending portion of the endoscope insertion portion provided in an embodiment of the first aspect of the present invention.

[0049] Figure 2 A front view showing the structure of the bending portion of the endoscope insertion portion provided in an embodiment of the first aspect of the present invention.

[0050] Figure 3 A top view showing the structure of the bending portion provided in an embodiment of the first aspect of the present invention.

[0051] Figure 4 Showing along Figure 2 A cross-sectional view taken along A-A in

[0052] Figure 5 A left view showing the structure of the bending portion provided in an embodiment of the first aspect of the present invention.

[0053] Figure 6 A schematic diagram of the force on the side wall edge of the incision or groove when the bending portion of the prior art bends.

[0054] Figure 7 A schematic diagram of the force on the side wall edge of the V-shaped groove when the bending portion provided in an embodiment of the first aspect of the present invention bends.

[0055] Figure 8 The front view showing the partial structure of the bending part of the endoscope insertion part provided by an embodiment of the second aspect of the present invention.

[0056] Figure 9 Show Figure 8 The top view of the shown structure.

[0057] Figure 10 Show the cross-sectional view along B-B of Figure 9 . Detailed implementation manners

[0058] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this implementation manner. On the contrary, the purpose of introducing the invention in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0059] It should be noted that in this specification, similar reference 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 further defined and explained in subsequent drawings.

[0060] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0061] In the description of this embodiment, it should be noted that the terms "proximal" and "distal" are relative positional relationships. When an operator operates an instrument to process a target object, along this instrument, the side closer to the operator is "proximal", and the side closer to the target object is "distal".

[0062] The terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0063] In the description of this embodiment, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0064] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0065] An electronic endoscope is a medical electronic optical instrument integrating technologies such as optics, mechanics, and electronics, which can be inserted into the body cavities and internal organs of the human body for direct observation, diagnosis, and treatment. It uses an electronic imaging element with extremely small dimensions to image the object in the cavity to be observed through a tiny objective optical system, then sends the received image signal to an image processing system, and finally outputs the processed image on a display for doctors to observe and diagnose. Electronic endoscopes are divided into electronic gastroscopes, electronic duodenoscopes, electronic colonoscopes, etc.

[0066] The electronic endoscope includes an operation part and a slender insertion part located on the distal side of the operation part. The operator operates the operation part to bend the bending part located at the distal end of the insertion part in different directions. The observation optical system located at the distal end face of the insertion part obtains an image of the desired observation site, and the operator can accordingly perform observation, diagnosis, shooting, treatment, etc. That is to say, when used as the bending part of the endoscope insertion part, the distal end of the bending part is provided with an observation optical system, and the proximal end is connected to other parts of the insertion part and is bent under the control of the operation part.

[0067] According to a specific embodiment of the first aspect of the present invention,

[0068] Figure 1 A perspective view showing the structure of the bending part of the endoscope insertion part provided by an embodiment of the present invention in the first aspect is shown. As Figure 1 shown, the present invention provides a bending part 1 of an endoscope insertion part, including a strip-shaped body extending along a first direction X. The outer contour of the cross-section of the body in the first direction X is a 6- to 12-sided polygon (as an example, Figures 1 to 5 shown as a 12-sided polygon). A plurality of through holes extending along the first direction X and penetrating the body are provided in the body. A plurality of V-shaped grooves 111a arranged along the first direction X and opening toward a second direction Y are provided on the body, and the second direction Y is perpendicular to the first direction X.

[0069] The cross-section of the bending portion of the existing endoscope insertion tube is generally designed to be circular or annular, that is, it presents as a cylinder in the relaxed state (not being pulled by the traction wire). When the insertion portion enters the body cavity or other positions to be observed in the human body, the bending portion is bent under the traction of the traction wire. At this time, it often rotates in the circumferential direction while bending, that is, twists or torsions, which affects the bending portion to reach the desired bending orientation and causes the viewing angle to deviate. The reason is that, as Figure 6 shown, when the bending portion of the prior art, which is roughly cylindrical, bends, the two relatively arranged surfaces of the fan-shaped incision (as referred to in CN109963491A) or the groove (as referred to in CN205197941U) come into contact. At this time, the edges of the two contacting surfaces are circular, meaning that the forces on the edges of the relatively arranged surfaces are basically the same. In addition, in order to make the bending portion easy to bend and be able to restore its original shape when no longer being pulled by the traction wire, the bending portion often uses an elastic material. This leads to the bending portion provided by the prior art being prone to rotate circumferentially when bending, that is, twist. By adopting the above technical solution of the present invention, through the setting that the outer contour of the cross-section of the body in the first direction is a polygon with 6 - 12 sides, when the bending portion of the endoscope insertion portion provided by the present invention bends in the second direction Y, as Figure 7 shown, the edges of the relatively arranged side walls of the V-shaped groove are straight edges in a folded line shape. When the V-shaped groove provided by the embodiment of the present invention bends with the bending portion and its relatively arranged side walls come into contact, the forces on the side wall edges are not uniform circumferentially, that is, the forces at the fold angles are different from those at the straight edges. In this way, it can prevent the bending portion from rotating circumferentially to a certain extent when bending. However, if the outer contour of the cross-section of the body in the first direction is set as a polygon with the number of sides less than 6, it will affect the flexibility of the bending of the bending portion and reduce the number and size of through holes that the body can accommodate; and the anti-twisting performance will also weaken as the number of sides increases. Therefore, after repeated tests, it is appropriate to set the number of sides of the polygon between 6 and 12.

[0070] Furthermore, the V-shaped setting of the V-shaped groove, that is, the bottom of the groove is linear. In this way, when the bending portion bends and the relatively arranged side walls of the groove come into contact, the contact area between the two side walls is larger. Such a setting is also helpful for the anti-twisting effect compared with the U-shaped groove or the setting where the bottom is not linear in the prior art.

[0071] In addition, since the bending portion is part of the insertion portion, and the insertion portion needs to be inserted into the human body or a narrow environment, a protective sleeve is often required to be provided on the outer side of the bending portion. Setting the outer contour of the bending portion body as a polygon is also beneficial for inserting the protective sleeve axially along the bending portion compared to the circular shape in the prior art. Those skilled in the art can understand that this is because the contact area between the outer side of the bending portion and the inner side of the protective sleeve is reduced; there are gaps between the straight sides of the polygon and the inner wall of the generally circular protective sleeve, which is also beneficial for inserting the protective sleeve axially along the bending portion. The above effects are particularly obvious when both the protective sleeve and the bending portion are made of elastic materials. Most importantly, the above technical solution has a simple structure and can be manufactured at low cost.

[0072] Figure 2 The front view showing the structure of the bending portion of the insertion portion of the endoscope provided by an embodiment of the first aspect of the present invention. Figure 3 The top view showing the structure of the bending portion provided by an embodiment of the first aspect of the present invention. Figure 4 Showing along Figure 2 The cross-sectional view taken along A-A in Figure 5 The left view showing the structure of the bending portion provided by an embodiment of the first aspect of the present invention. As Figures 1 to 5 shown, a plurality of V-shaped grooves 112a arranged along the first direction X and opening towards the third direction Z are provided on the body, and the third direction Z is perpendicular to the second direction Y and the first direction X at the same time. A plurality of V-shaped grooves 111b arranged along the first direction X and opening towards the opposite direction Y' of the second direction Y, and / or V-shaped grooves 112b opening towards the opposite direction Z' of the third direction Z are also provided on the body.

[0073] Continue to refer to Figures 1 to 5 , a V-shaped groove 111a facing the second direction Y and a V-shaped groove 111b facing the opposite direction Y' of the second direction Y are arranged oppositely to form a first V-shaped groove group 111; a V-shaped groove 112a facing the third direction Z and a V-shaped groove 112b facing the opposite direction Z' of the third direction Z are arranged oppositely to form a second V-shaped groove group 112. The opposite arrangement means that the V-shaped groove 111a and the V-shaped groove 111b are in the same position in the first direction X. In other words, the distances between the V-shaped groove 111a and the V-shaped groove 111b from one end or the other end of the bending portion are the same, so that during the bending process of the bending portion, when one of the V-shaped grooves 111a and the V-shaped groove 111b is closed, the other V-shaped groove is further opened, which is beneficial to ensuring the stability of the bending portion during the bending process.

[0074] Continue to refer to Figure 1, the first V-groove group 111 and the second V-groove group 112 are arranged at intervals along the first direction X, which is beneficial to ensuring the normal bending and structural stability of the bending part when it bends along the second direction Y, the opposite direction Y' of the second direction, the third direction Z or the opposite direction Z' of the third direction. In another embodiment of the present invention, the interval d between two V-grooves with opposite opening directions in the first V-groove group 111 and / or the second V-groove group 112 is 0.3 - 0.9 millimeters (as Figure 2 and Figure 3 shown), to ensure the number of bending times of the bending part.

[0075] The diameter of the circumscribed circle of the cross-section of the main body of the bending part 1 is approximately 12 millimeters. Refer to Figure 2 , in the embodiment of the present invention, the maximum opening angle of the V-groove is 45 degrees. Through experimental comparison, it is found that based on the structures and materials of the components in the embodiments provided by the present invention, 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-groove is 10 degrees. Based on the cooperation of the structures and materials of the components in the embodiments provided by the present invention, 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 V-groove has a direct relationship with the diameter of the circumscribed circle of the cross-section of the main body of the bending part 1, and the cooperation relationship between the two directly affects the bending performance and anti-twisting performance of the bending part 1. According to the experiment, to ensure the above performance, the opening angle of the V-groove and the diameter of the circumscribed circle of the cross-section of the main body of the bending part 1 are approximately linearly related, that is, the numerical value of the maximum opening angle of the V-groove is 3.75 times the numerical value of the diameter of the circumscribed circle of the cross-section of the main body of the bending part 1.

[0076] As Figure 2 shown, the maximum opening angles α1, α2, α3 of the V-groove are 45 degrees at most and 10 degrees at least. Combining Figures 1 to 4 , in an embodiment of the present invention, from the proximal end 12 to the distal end 13 of the bending part 1, the opening angle of the V-groove gradually increases, that is, α1 < α2 < α3.

[0077] However, the maximum opening angle and the minimum opening angle of the above V-groove do not need to be satisfied simultaneously. In particular, the minimum opening angle can be adjusted as needed.

[0078] As Figure 5, the through holes may include a working channel through hole 14, an auxiliary channel through hole 15, or a wire harness channel through hole 16. The wire harness channel through hole 16 may include through holes 16a, 16b, and 16c, providing paths for the traction wire, optical fiber, and electric wire respectively. The role of the traction wire is to control the bending of the bending portion according to the operation of the operation portion. Specifically, one end of the traction wire is fixed to the operation portion, and the other end passes through the proximal end of the bending portion and is fixed to the distal end of the bending portion. By pulling and releasing the traction wire with the operation portion, the head end of the bending portion can be driven to pull and release, thereby realizing the bending control of the bending portion of the insertion portion; the optical fiber can provide illumination for the process of inserting the endoscope into the human body cavity and observing by transmitting the light of an external light source to the required position; the electric wire can be a camera cable for transmitting electronic data or a cable for transmitting a relatively 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 one of PVC (Chinese name: polyvinyl chloride), TPE (Chinese name: thermoplastic elastomer), PTFE (Chinese name: polytetrafluoroethylene), and TPU (Chinese name: thermoplastic polyurethane elastomer). The auxiliary channel through hole 15 provides a path for the water pipe or air pipe, and the material of the water pipe or air pipe can be one of PVC (Chinese name: polyvinyl chloride), TPE (Chinese name: thermoplastic elastomer), PTFE (Chinese name: polytetrafluoroethylene), and TPU (Chinese name: thermoplastic polyurethane elastomer). The material of the water pipe or air pipe and the material of the working channel pipeline can have a cooperative effect with the material of the bending portion 1 body. By mutually adjusting the two materials, the required control force, bending angle, and bending stability can be further controlled. In the embodiment of the present invention, the material of the bending portion 1 body can be one of silicone rubber, TPE (Chinese name: thermoplastic elastomer), TPU (Chinese name: thermoplastic polyurethane elastomer), PVC (Chinese name: polyvinyl chloride), and PP (Chinese name: polypropylene).

[0079] In the prior art, the bending portion of the endoscopic insertion portion adopts a split type, and multiple metal pipe joints are sequentially connected, or it is carved from a metal pipe. The assembly process is complex and the manufacturing cost is high. The bending portion of the endoscopic insertion portion provided by the present invention is integrally injection molded, reducing the assembly of parts and lowering the production cost.

[0080] The first aspect of the present invention further provides an endoscopic insertion portion, including the bending portion of the endoscopic insertion portion described in the above embodiment, and further including: a protective sleeve for sleeving outside the bending portion; a working channel pipeline placed in the working channel through hole, and the material of the working channel pipeline is one of PVC, TPE, PTFE, and TPU; a water pipe or air pipe placed in the auxiliary channel through hole, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE, and TPU.

[0081] The first aspect of the present invention further provides an endoscope, including the endoscope insertion part described above, which has a simple structure and can be manufactured at low cost.

[0082] According to a specific embodiment of the second aspect of the present invention,

[0083] An embodiment of the present invention discloses a bending part 1 of an endoscope insertion part, including a strip-shaped body extending along a first direction X. A plurality of through holes extending along the first direction X and penetrating the body are provided in the body. A plurality of V-shaped grooves arranged along the first direction X and opening towards a second direction Y are provided on the body. The second direction Y is perpendicular to the first direction X. Among them, as Figure 8 shown, a groove with a flat bottom surface 17 is provided in the area where the V-shaped groove is arranged on the outer side of the body, so that the outer edge 18 of the side wall of the V-shaped groove forms a straight edge.

[0084] In other embodiments, a plurality of grooves are provided along the circumferential direction of the body, so that the outer edge 18 of the side wall of the V-shaped groove forms a broken line edge composed of straight edges.

[0085] As described in the specific embodiment of the first aspect of the present invention above, in the specific embodiment of the second aspect of the present invention, compared with the prior art, when the bending part 1 bends towards the second direction Y, since the relatively arranged side wall edges 18 of the V-shaped groove are straight edges, or further straight edges forming a broken line, it is possible to prevent the bending part 1 from rotating in the circumferential direction to a certain extent during bending.

[0086] For the convenience of description, the V-shaped groove and the concave surface are defined as the V-shaped groove area. A plurality of V-shaped groove areas arranged along the first direction X and opening towards a third direction Z can be provided on the body. The third direction Z is perpendicular to both the second direction Y and the first direction X at the same time. A plurality of V-shaped groove areas arranged along the first direction X and opening towards the opposite direction Y' of the second direction Y and / or the opposite direction Z' of the third direction Z can also be provided on the body.

[0087] As Figure 8 shown, a V-shaped groove area facing the second direction Y and a V-shaped groove area facing the opposite direction Y' of the second direction Y are arranged opposite to each other to form a first V-shaped groove area group. Correspondingly, a V-shaped groove area facing the third direction Z and a V-shaped groove area facing the opposite direction Z' of the third direction Z can be arranged opposite to each other to form a second V-shaped groove area group.

[0088] In another embodiment, the projection of the outer edge 18 of the V-shaped groove of a first V-shaped groove area group or a second V-shaped groove area group on a reference plane perpendicular to the first direction X can be a 6-12-sided polygon. The beneficial effects of such a setting are as described in the specific embodiment of the first aspect of the present invention.

[0089] In another embodiment, the distance d between two V-grooves with opposite opening directions in the first V-groove group and / or the second V-groove group is 0.3 - 0.9 millimeters (as Figure 2 and Figure 3 shown) to ensure the number of bends of the bending part. The first V-groove group and the second V-groove group are arranged at intervals along the first direction X. The maximum opening angle degree of the V-groove is 3.75 times the diameter in millimeters of the circumcircle of the cross-section of the outer edge of the V-groove in the V-groove group.

[0090] The through holes can include a working channel through hole, an auxiliary channel through hole, and a wire harness channel through hole.

[0091] In one embodiment, as Figures 8 - 10 shown, a rib 19 extending along the first direction X is provided on the outer periphery of the body of the bending part 1. It can also be a bump, a convex point, etc. arranged along the first direction X, or a groove extending along the first direction X. As described above, such a setting is beneficial to more quickly insert the bending part 1 axially (i.e., the first direction X) into the protective sleeve.

[0092] Similar to the first aspect of the present invention, the bending part 1 of the endoscope insertion part can be integrally injection-molded. The material of the bending part 1 of the endoscope insertion part can be one of silicone rubber, TPE, TPU, PVC, and PP. From the proximal end 12 to the distal end 13 of the bending part 1, the opening angle of the V-groove can be set to increase sequentially.

[0093] The second aspect of the present invention also provides an endoscope insertion part, including the bending part 1 of the endoscope insertion part described above. The bending part 1 may further include: a protective sleeve for sleeving outside the bending part; a working channel pipeline placed in the working channel through hole, and the material of the working channel pipeline is one of PVC, TPE, PTFE, and TPU; a water pipe or an air pipe placed in the auxiliary channel through hole, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE, and TPU.

[0094] The second aspect of the present invention also provides an endoscope, including the above endoscope insertion part.

[0095] Although the present invention has been illustrated and described by referring to certain preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A bending section of an endoscope insertion section, comprising a strip-shaped body extending in a first direction, characterized in that, The interior of the body is provided with a plurality of through holes extending along the first direction and penetrating the body. The body is provided with a plurality of V-shaped grooves arranged along the first direction and opening towards the second direction, where the second direction is perpendicular to the first direction. Among them, in the area where the V-shaped grooves are arranged on the outer side of the body, there is 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 V-shaped grooves and the grooves form a V-shaped groove area. The body is provided with a plurality of V-shaped groove areas arranged along the first direction and opening towards the third direction, where the third direction is perpendicular to both the second direction and the first direction at the same time; The body is provided with a plurality of V-shaped groove areas arranged along the first direction and opening towards the opposite direction of the second direction and / or the opposite direction of the third direction; One of the V-shaped groove areas facing the second direction and one of the V-shaped groove areas facing the opposite direction of the second direction are arranged opposite to each other to form a first V-shaped groove area group; one of the V-shaped groove areas facing the third direction and one of the V-shaped groove areas facing the opposite direction of the third direction are arranged opposite to each other to form a second V-shaped groove area group; The outer edge projection of the V-shaped groove of one of the first V-shaped groove area groups or one of the second V-shaped groove area groups on a reference plane perpendicular to the first direction is a 6- to 12-sided polygon; the material of the bending part of the endoscope insertion part is one of silicone rubber, TPE, TPU, PVC, and PP.

2. The bending section of the endoscope insertion section according to claim 1, wherein There are a plurality of the grooves along the circumferential direction of the body, so that the outer edge of the side wall of the V-shaped groove forms a broken line edge composed of straight edges.

3. The bending part of the endoscope insertion part according to claim 1, characterized in that, The interval between two V-shaped grooves with opposite opening directions in the first V-shaped groove area group is 0.3 - 0.9 millimeters; and / or, the interval between two V-shaped grooves with opposite opening directions in the second V-shaped groove area group is 0.3 - 0.9 millimeters.

4. The bending portion of the endoscope insertion portion according to claim 3, characterized in that, The first V-shaped groove area group and the second V-shaped groove area group are arranged at intervals along the first direction.

5. The bending section of the endoscope insertion section according to any one of claims 1 to 4, characterized in that The maximum opening angle degree 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 area group.

6. The bending portion of the endoscope insertion portion according to claim 1 or 2, characterized in that, The through holes include a working channel through hole, an auxiliary channel through hole, and a wire harness channel through hole.

7. The bending portion of the endoscope insertion portion according to claim 1 or 2, characterized in that, The outer circumference of the body is provided with a rib extending along the first direction.

8. The bending section of the endoscope insertion section according to claim 1 or 2, characterized in that The bending part of the endoscope insertion part is integrally injection molded.

9. The bending section of the endoscope insertion section according to claim 5, characterized in that, From the proximal end to the distal end of the bending part, the opening angle of the V-shaped groove gradually increases.

10. An endoscope insertion section, characterized in that, It includes the bending part of the endoscope insertion part as described in any one of claims 1 - 9.

11. The endoscope insertion section according to claim 10, wherein, The through holes include a working channel through hole and an auxiliary channel through hole. The endoscope insertion part further includes: A protective sleeve for sleeving outside the bending part; A working channel pipeline placed in the working channel through hole, and the material of the working channel pipeline is one of PVC, TPE, PTFE, and TPU; A water pipe or an air pipe placed in the auxiliary channel through hole, and the material of the water pipe or the air pipe is one of PVC, TPE, PTFE, and TPU.

12. An endoscope, characterized in that, It includes the endoscope insertion part as described in claim 10 or 11.

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