CN112472004A

CN112472004A - Endoscope and insertion part for endoscope

Info

Publication number: CN112472004A
Application number: CN202011483163.1A
Authority: CN
Inventors: 陆海同; 蔡冰
Original assignee: Hangzhou Sikang New Medical Technology Co ltd
Current assignee: Hangzhou Sikang New Medical Technology Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-12

Abstract

The embodiment of the application discloses an insertion part for an endoscope and the endoscope. The insertion part comprises a snake bone part and an insertion tube; the insert tube comprises an insert tube body and a first soft adhesive layer coated on the outer wall of the insert tube body; the snake bone part comprises a snake bone body and a second soft rubber layer coated on the outer wall of the snake bone body; the snake bone body and the insertion pipe body are integrally formed; the inserting pipe body is provided with a plurality of cutting seams; the plurality of slits are distributed at intervals along the axial direction of the insertion pipe body. The snake bone body and the insertion pipe body are integrally formed, and the insertion pipe body is provided with a plurality of cutting seams through laser cutting or linear cutting, so that the wall thickness of the insertion pipe can be reduced, the operable space of the insertion part can be increased, and the strength of the insertion part can be improved.

Description

Endoscope and insertion part for endoscope

Technical Field

The present specification relates to the field of endoscopes, and more particularly, to an endoscope and an insertion portion for the endoscope.

Background

Currently, endoscopes are widely used in medical and industrial fields, and can be used for observing human organs, narrow gaps, holes and the like. The insertion part for the endoscope can be inserted into the space to be detected so as to directly check the condition in the space to be detected. For endoscopes in different application scenes, the thinner the wall thickness of the insertion tube is, the smaller the outer diameter of the insertion tube is, the larger the operable space of an operator is, and for a medical endoscope, the pain of a patient can be reduced. Therefore, it is necessary to provide an insertion section and an endoscope that have a small wall thickness and can satisfy the performance requirements of an insertion tube.

Disclosure of Invention

One embodiment of the present description provides an insertion section for an endoscope. The insertion part comprises a snake bone part and an insertion tube; the insert tube comprises an insert tube body and a first soft adhesive layer coated on the outer wall of the insert tube body; the snake bone part comprises a snake bone body and a second soft rubber layer coated on the outer wall of the snake bone body; the snake bone body and the insertion pipe body are integrally formed; the inserting pipe body is provided with a plurality of cutting seams; the plurality of slits are distributed at intervals along the axial direction of the insertion pipe body.

In some embodiments, the first soft gel layer has a hardness greater than the hardness of the second soft gel layer.

In some embodiments, the insertion tube further comprises a first braid coated on an outer wall of the insertion tube body; the first woven layer is positioned between the outer wall of the insertion tube body and the first soft rubber layer; the snake bone part also comprises a second braided layer coated on the outer wall of the snake bone body; the second weaving layer is located between the outer wall of the snake bone body and the second soft rubber layer.

In some embodiments, the insertion tube has a wall thickness in the range of 0.15mm to 0.4 mm.

In some embodiments, the snake bone body and the insertion tube body are made of stainless steel or plastic.

In some embodiments, the slits are formed by laser cutting or wire cutting.

In some embodiments, the slit is angled at 15 ° to 45 ° from a direction perpendicular to the axis of the insertion tube body.

In some embodiments, the ratio of the length of the slit to the outer diameter of the insertion tube body is in the range of 3-8.8.

In some embodiments, the slits have a width of 0.02mm to 2 mm.

In some embodiments, the slits are parallel to each other.

In some embodiments, the plurality of slits are evenly distributed in the axial direction of the insertion tube body.

In some embodiments, the plurality of slits are unevenly distributed in an axial direction of the insertion tube body.

In some embodiments, the insertion tube body includes a first end and a second end, the first end being proximate to the snake body and the second end being distal from the snake body, and a distance between two adjacent slits on the insertion tube body proximate to the first end is less than a distance between two adjacent slits on the insertion tube body proximate to the second end.

In some embodiments, the distance between the adjacent two slits gradually increases from the first end to the second end in the axial direction of the insertion tube body.

In some embodiments, the distance between two adjacent slits increases stepwise from the first end to the second end in the axial direction of the insertion tube body.

One of the embodiments of the present specification provides an endoscope including the insertion section for an endoscope according to any of the embodiments of the present specification.

Drawings

The present description will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not intended to be limiting, and in these embodiments like numerals are used to indicate like structures, wherein:

FIG. 1 is a cross-sectional view of an insertion portion for an endoscope, shown in accordance with some embodiments of the present description;

FIG. 2 is an enlarged schematic view of region A of FIG. 1;

FIG. 3 is a schematic view of a snake bone body integrally formed with an insertion tube body according to some embodiments of the present disclosure;

FIG. 4 is a schematic view of an insertion tube body according to some embodiments herein;

FIG. 5 is a schematic view of the expansion of the insertion tube body of FIG. 4;

FIG. 6 is a schematic view of another insertion tube body shown in accordance with some embodiments of the present description;

FIG. 7 is a schematic view of a further insertion tube body shown in accordance with some embodiments of the present description.

In the figure, 100-insertion part, 110-insertion tube, 111-insertion tube body, 112-cutting, 1121-first line section cutting, 1122-second line section cutting, 113-first soft rubber layer, 114-first weaving layer, 120-snake bone part, 121-snake bone body, 121 a-first bone joint, 121 b-second bone joint, 122-second soft rubber layer, 123-second weaving layer, M-first end and N-second end.

Detailed Description

Reference will now be made in detail to exemplary embodiments or implementations, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

The present embodiment relates to an insertion section for an endoscope and an endoscope, which can be used in medical and industrial fields. The endoscope comprises an endoscope operating handle, an insertion part and a lens module arranged at the tail end of the insertion part. The insertion section is connected to an endoscope operation handle. Under the control of the operating handle, the insertion part of the medical endoscope can enter the human body through a natural pore canal of the human body or a small incision made by an operation and is guided into the position of a pre-examined organ, so that the lens module arranged at the tail end of the insertion part can directly peep the pathological changes of the relevant part. Medical endoscopes may include, but are not limited to, gastroscopes, enteroscopes, colonoscopes, sigmoidoscopes, nasoscopes, bronchoscopes, cystoscopes, ureteroscopes, nephroscopes, colposcopes, hysteroscopes, laparoscopes, arthroscopes, thoracoscopes, mediastinoscopes, and the like. The insertion portion of an industrial endoscope may be directed into a small gap or hole that is not directly visible to the naked eye to facilitate inspection or detection of damaged components.

In some embodiments, the insertion portion may include a snake bone portion and an insertion tube. The insert tube can comprise an insert tube body and a first soft adhesive layer coated on the outer wall of the insert tube body. The snake bone part can comprise a snake bone body and a second soft rubber layer coated on the outer wall of the snake bone body. In some embodiments, the snake bone body and the insertion tube body are integrally formed, so that not only the connection part between the snake bone body and the insertion tube body, but also the connection process (such as bonding or welding) can be omitted. Because the snake bone body and the insertion tube body do not need to be connected, no protrusion and/or recess occurs on the connecting part, thereby not only increasing the operable space, but also improving the strength of the insertion part and avoiding the occurrence of fracture or damage during use.

In some embodiments, the insertion tube body may be provided with a plurality of slits, and the plurality of slits may be spaced apart along the axial direction of the insertion tube body. The plurality of cutting seams distributed at intervals along the axial direction of the inserting pipe body can ensure that the inserting pipe body has better breaking resistance, tensile resistance and twisting resistance simultaneously. In some embodiments, the plurality of slits may be formed by laser cutting or wire cutting fabrication. In some embodiments, the insert tube may further include a first braid wrapped around the insert tube body, the first braid may increase the torsional and tensile strength of the insert tube. Because the inserting tube body has better fracture resistance, tensile resistance and twisting resistance simultaneously, the performance requirement of the inserting tube can be met by using the weaving layer with thinner wall thickness to coat the inserting tube body. In some embodiments, the wall thickness of the insertion tube can be in the range of 0.2mm-0.3mm, so that the outer diameter of the insertion tube for the endoscope under different application scenes is greatly reduced, the movable space of the endoscope entering a certain space can be enlarged, and the pain of a patient can be reduced for the medical endoscope.

It should be understood that the application scenarios of the insertion portion and the endoscope are only examples or embodiments of the present application, and those skilled in the art can apply the present application to other similar scenarios without creative effort according to the drawings.

FIG. 1 is a cross-sectional view of an insertion portion for an endoscope, shown in accordance with some embodiments of the present description. Fig. 2 is an enlarged schematic view of region a in fig. 1.

As shown in fig. 1 and 2, the insertion part 100 may include an insertion tube 110 and a snake bone part 120. The insertion part 100 may be a part connected to an operation handle of the endoscope for insertion into a space to be inspected (e.g., a human organ or a part to be inspected) so as to directly view the condition in the space to be inspected. In some embodiments, the snake bone 120 can be a bendable tubular structure. The free end (i.e. the end capable of bending and turning) of the snake bone part 120 can be connected with the lens module. The snake bone part 120 can be driven by the pulling rope to bend and turn along a specific direction in the space to be detected, so that the lens module approaches or approaches to the position to be observed. In some embodiments, the insertion tube 110 may be a bendable tubular structure. One end of the insertion tube 110 may be directly connected to an end of the snake bone part 120 away from the lens module. The other end of the insertion tube 110 may be connected to an operating handle of the endoscope. A pulling string extends inside the insertion tube 110 and the snake bone 120, and has one end connected to the operating handle and the other end connected to the free end of the snake bone 120. The manipulation handle may control the degree of bending or the rotational direction of the insertion tube 110 and the snake 120 by controlling the degree of tightening or loosening of the traction rope inside the insertion tube 110 and the snake 120.

In some embodiments, the insertion tube 110 may include an insertion tube body 111 and a first soft gel layer 113. In some embodiments, the insertion tube body 111 may be provided with a plurality of slits 112. A plurality of slits 112 are circumferentially arranged on the outer wall of the insertion tube body 111. The lengths of the slits 112 extend in the circumferential direction of the insertion tube body 111. In some embodiments, the angular range of the slit 112 around the insertion tube body 111 may include 30 ° to 300 °. In some embodiments, the angular range of the slit 112 around the insertion tube body 111 may include 60 ° to 270 °. In some embodiments, the angular range of the slit 112 around the insertion tube body 111 may include 90 ° to 200 °. In some embodiments, the angular range of the slit 112 around the insertion tube body 111 may include 100 ° to 180 °. In some embodiments, the plurality of slits 112 are spaced apart in a circumferential direction of the insertion tube body 111. For example, 3 segments of spaced slits 112 are arranged circumferentially on the outer wall of the insertion tube body 111 in the same circumferential direction. Further, as shown in fig. 4, a plurality of slits 112 are distributed at intervals along the axial direction of the insertion tube body 111 (for example, the direction in which the straight line L in fig. 4 is located). The plurality of slits 112 formed in the insertion tube body 111 may provide superior folding resistance, tensile resistance, and torsion resistance. In some embodiments, fracture resistance may refer to the ability of the insertion tube body to resist being broken when subjected to external forces other than axial and non-circumferential forces (e.g., radial forces). For example, the operator can control the insertion portion 100 to be inserted into a tortuous and narrow space, and the insertion tube body 111 can be bent without being broken by an external force. In some embodiments, tensile may refer to the ability of the insertion tube body to resist tensile deformation when subjected to an external force in the axial direction. For example, the operator controls the insertion section 100 to move forward or backward in a narrow space, and the insertion tube main body 111 is not subjected to tensile deformation by an external force for stretching. In some embodiments, torsional resistance may refer to the ability of the insertion tube body to resist torsional deformation when subjected to a circumferential torsional force. For example, the operator controls the insertion portion 100 to rotate in a narrow space so that the lens module can obtain a better view, and the insertion tube body 111 is not distorted under the action of the torque force. Specific descriptions of the several slits can be found in other parts of this specification, such as fig. 4, 5, 6, and 7 and their related descriptions.

In some embodiments, the first soft gel layer 113 may be coated on the outer wall of the insertion tube body 111. In some embodiments, the material of the first soft adhesive layer 113 may include, but is not limited to, PVC resin, silicone rubber, polyurethane elastomer rubber, polyethylene plastic, polypropylene plastic, or the like. The first soft adhesive layer 113 may prevent the insertion tube body 111 from directly contacting the space to be detected or the insertion space. The first soft adhesive layer 113 can play a waterproof role, so that the insertion tube body 111 is prevented from being polluted or corroded by liquid, and the performance of the insertion tube 110 is prevented from being affected. In some embodiments, the first soft gel layer 113 may have flexibility, and when the insertion tube body 111 is passively bent by a force, the first soft gel layer 113 may be bent along with the bending of the insertion tube body 111.

In some embodiments, the insertion tube 110 may also include a first braid 114. In some embodiments, first braid 114 may be a tubular structure that is wrapped over the outer wall of insertion tube body 111. The first braid 114 may be positioned between the outer wall of the insertion tube body 111 and the first soft gel layer 113. In some embodiments, first braided layer 114 may be braided from a plurality of braided strands, each strand of braided strands may include a single strand or may include a plurality of strands. In some embodiments, the material of the wire may include, but is not limited to, stainless steel, carbon fiber, nylon, PET, poly-paraphenylene terephthalamide, and the like. First braided layer 114 may serve to increase the torsional and tensile strength of insertion tube 110. In some embodiments, first braid 114 may be flexible, and first braid 114 may flex with the bending of insertion tube body 111 when insertion tube body 111 is passively flexed by a force. In some embodiments, the torsional strength of first braid 114 may be greater than the torsional strength of insertion tube body 111. In some embodiments, the torsional strength of first braid 114 may be equal to the torsional strength of insertion tube body 111. In some embodiments, the torsional strength of first braid 114 may be less than the torsional strength of insertion tube body 111. In some embodiments, the tensile strength of first braid 114 may be greater than the tensile strength of insertion tube body 111. In some embodiments, the tensile strength of first braid 114 may be equal to the tensile strength of insert tube body 111. In some embodiments, the tensile strength of first braid 114 may be less than the tensile strength of insertion tube body 111.

In some embodiments, in order to improve the structural strength of the first soft adhesive layer 113, the first soft adhesive layer 113 may be integrally connected with the first woven layer 114. The connection manner of the first soft adhesive layer 113 and the first woven layer 114 may include, but is not limited to, adhesion, hot melting, and the like. In some embodiments, the first soft adhesive layer 113 may be integrally connected to the first woven layer 114 by extrusion molding. In some embodiments, the insertion tube body 111 and the first braid 114 may be integrally connected, and the connection may include, but is not limited to, bonding, etc.

In some embodiments, the insertion tube 110 may include an insertion tube body 111 and a first soft gel layer 113. In some embodiments, to further enhance the tensile and torsional strength of the insertion tube 110, the insertion tube 110 may also include a first braided layer 114. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.15mm to 0.4 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.16mm to 0.39 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.17mm to 0.38 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.18mm to 0.37 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.19mm to 0.36 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.2mm to 0.35 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.2mm to 0.34 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.2mm to 0.33 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.2mm to 0.32 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.2mm to 0.31 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.2mm to 0.3 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.21mm to 0.29 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.22mm to 0.28 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.23mm to 0.27 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.24mm to 0.26 mm. In some embodiments, the wall thickness of insertion tube 110 may be in the range of 0.245mm-0.255 mm.

In some embodiments, the snake bone portion 120 may include a snake bone body 121 and a second soft gel layer 122. In some embodiments, the snake bone body 121 can be a bendable tubular structure. The snake bone body 121 may include several bone segments, which may be connected in sequence to form a tubular structure. In some embodiments, adjacent condyles may be rotated relative to one another. Under the action of the traction rope, the snake bone body 121 can be bent and turned along a specific direction.

In some embodiments, the second soft rubber layer 122 may cover the outer wall of the snake bone body 121. In some embodiments, the material of the second soft rubber layer 122 may include, but is not limited to, PVC resin, silicone rubber, polyurethane elastomer rubber, polyethylene plastic, polypropylene plastic, or the like. The second soft rubber layer 122 can be used for enhancing the tensile strength and the torsional strength of the snake bone part 120, can also prevent the snake bone body 121 from directly contacting a space to be detected or an insertion space, plays a waterproof role, and can prevent liquid from polluting or corroding the snake bone body 121 to influence the performance of the snake bone part 120. In some embodiments, the second soft rubber layer 122 may have flexibility, and when the snake bone body 121 is stressed to bend and turn, the second soft rubber layer 122 may bend along with the bending of the snake bone body 121.

In some embodiments, the snake bone portion 120 can also include a second braided layer 123. In some embodiments, the second braid 123 may be a tubular structure that wraps over the outer wall of the snake body 121. The second braided layer 123 may be located between the outer wall of the snake bone body 121 and the second soft glue layer 122. In some embodiments, second braid 123 may be braided from a plurality of strands of braided wire, each strand of braided wire may include a single wire or may include a plurality of wires. In some embodiments, the filament material may include, but is not limited to, stainless steel, carbon fiber, nylon, PET, poly-paraphenylene terephthalamide, and the like. In some embodiments, the second braided layer 123 may have flexibility, and the second braided layer 123 may be bent along with the bending of the snake body 121 when the snake body 121 is bent.

In some embodiments, in order to improve the structural strength of the second soft rubber layer 122, the second soft rubber layer 122 may be integrally connected with the second woven layer 123. The connection manner of the second soft adhesive layer 122 and the second woven layer 123 may include, but is not limited to, adhesion, hot melting, and the like. In some embodiments, the second soft rubber layer 122 may be integrally connected to the second woven layer 123 by extrusion molding. In some embodiments, the snake bone body 121 and the second braided layer 123 may be integrally connected, and the connection manner may include, but is not limited to, adhesion, and the like.

In some embodiments, the hardness of the first soft rubber layer 113 may be greater than that of the second soft rubber layer 122, and the hardness of the second soft rubber layer 122 is relatively soft, so that the snake bone part 120 can bend and turn freely. The first soft gel layer 113 is relatively hard and can be easily manipulated by an operator (e.g., a physician) to deliver the insert 100 to a site or component to be detected. In some embodiments, the first soft adhesive layer 113 and the second soft adhesive layer 122 may be made of the same material. In some embodiments, the materials of the first soft adhesive layer 113 and the second soft adhesive layer 122 may also be different. The material of the first soft adhesive layer 113 and the second soft adhesive layer 122 is not limited in this embodiment, and includes but is not limited to resin, rubber, plastic, and the like. As an example, the material of the first and second

soft rubber layers

113 and 122 may include PVC resin, silicone rubber, polyurethane elastomer rubber, polyethylene plastic, polypropylene plastic, or the like.

In some embodiments, the first soft adhesive layer 113 and the second soft adhesive layer 122 may be integrally connected or formed, so as to eliminate the protrusion and/or depression of the connection portion of the first soft adhesive layer 113 and the second soft adhesive layer 122, which not only can reduce the outer diameter of the insertion portion 100, increase the operable space of the insertion portion 100, but also can improve the strength of the insertion portion 100. Wherein, the operable space may refer to a space size between an outer surface of the insertion part 100 and an inner wall of the space or the channel to be detected. Under a specific space or passage to be detected, the smaller the height of the protrusion of the connection portion of the first soft adhesive layer 113 and the second soft adhesive layer 122 is or no protrusion is, the larger the distance between the outer surface of the insertion portion 100 and the inner wall of the space or passage to be detected is, the larger the operable space of the insertion portion 100 is. In some embodiments, the connection of the first soft adhesive layer 113 and the second soft adhesive layer 122 may include, but is not limited to, heat fusion, adhesion, and the like.

In some embodiments, the first braided layer 114 and the second braided layer 123 may be integrally formed, which not only facilitates the integral covering of the first soft adhesive layer 113 and the second soft adhesive layer 122, but also improves the strength of the insertion portion 100, thereby avoiding the occurrence of fracture or breakage during use.

In some embodiments, the snake bone body 121 and the insertion tube body 111 may be integrally formed. In some embodiments, the snake bone body 121 and the insertion tube body 111 may be connected as one body. The connection of the snake body 121 and the insertion tube body 111 may include, but is not limited to, welding, etc.

FIG. 3 is a schematic view of a snake bone body integrally formed with an insertion tube body according to some embodiments of the present disclosure.

As shown in fig. 3, the snake bone body 121 and the insertion tube body 111 may be integrally formed. The snake bone body 121 can include several condyles (e.g., a first condyle 121a and a second condyle 121b, etc.). Several condyles may be connected in sequence to form the snake bone body 121. In some embodiments, adjacent condyles (e.g., first condyle 121a and second condyle 121b) may be relatively curved therebetween. The insertion tube body 111 may include a first end M and a second end N. The first end M is close to the snake bone body 121, and the second end N is far away from the snake bone body 121. The first end M of the insertion tube body 111 is integrally formed with one condyle (e.g., first condyle 121a) at the end of the snake bone body 121.

The snake bone body 121 and the insertion tube body 111 are integrally formed, so that not only can a connecting part between the snake bone body 121 and the insertion tube body 111 be omitted, but also a connecting process (such as bonding or welding) can be omitted, and meanwhile, the protrusions and/or the depressions at two ends of the connecting part can be eliminated, so that the outer diameter size of the insertion part 100 can be reduced, the operable space of the insertion part 100 can be increased, the strength of the insertion part 100 can be further improved, and the occurrence of fracture or damage in use can be avoided.

In some embodiments, the material of the snake bone body 121 and the insertion tube body 111 may include, but is not limited to, stainless steel or plastic. In some embodiments, the snake bone body 121 and the insertion tube body 111 may be the same material. For example, the snake bone body 121 and the insertion tube body 111 may be both made of stainless steel. For example, the snake bone body 121 and the insertion tube body 111 may be made of plastic. In some embodiments, the snake bone body 121 and the insertion tube body 111 may be made of different materials. For example, the insertion tube body 111 may be made of stainless steel, and the snake bone body 121 may be made of plastic. For another example, the insertion tube body 111 may be made of plastic, and the snake bone body 121 may be made of stainless steel.

FIG. 4 is a schematic view of an insertion tube body according to some embodiments herein. Fig. 5 is a schematic view of the expansion of the insertion tube body of fig. 4. FIG. 6 is a schematic view of another insertion tube body shown in accordance with some embodiments of the present description. FIG. 7 is a schematic view of a further insertion tube body shown in accordance with some embodiments of the present description.

In some embodiments, the plurality of slits 112 on the insertion tube body 111 may be formed by laser cutting or wire cutting. In some embodiments, the snake bone body 121 can be shaped by means of laser cutting. In some embodiments, the integrally formed snake bone body 121 and insertion tube body 111 can be formed by laser cutting. In some embodiments, the plurality of slits 112 on the insertion tube body 111 and/or the snake bone body 121 can be formed by injection molding or the like.

The line-form of the slits may include, but is not limited to, line-segment type slits, zigzag type slits, arc type slits, and/or crescent type slits, etc. In some embodiments, the plurality of slits 112 on the insertion tube body 111 may have the same line type. In some embodiments, the plurality of slits 112 may include a line segment type slit or a curved type slit. As shown in fig. 4 and 5, the slits 112 may each be a segment type slit. As shown in fig. 6, the slits may be all of a zigzag type slit. As shown in fig. 7, the slits may be all crescent-shaped slits. In some embodiments, the plurality of slits 112 on the insertion tube body 111 may have different line types. For example, the line type of the plurality of slits 112 inserted into the pipe body 111 may include a line segment type slit and a zigzag type slit. For another example, the line type of the plurality of slits 112 on the insertion tube body 111 may include an arc type slit and a crescent type slit. Also for example, the line type of the plurality of slits 112 inserted into the pipe body 111 may include a line segment type slit and an arc type slit. Also for example, the plurality of slits 112 on the insertion tube body 111 may be formed in a linear shape including a line-segment type slit, an arc-line type slit, and a crescent type slit. For another example, the plurality of slits 112 on the insertion tube body 111 may have a linear shape including a line segment type slit, a zigzag type slit, an arc type slit, and a crescent type slit.

As shown in fig. 4 and 5, a broken line L is a central axis of the insertion tube body 111. The dotted line P is perpendicular to the dotted line L. The axial direction of the insertion tube body 111 may be a direction indicated by a dotted line L, and the direction perpendicular to the axial direction of the insertion tube body 111 may be a direction indicated by a dotted line P. In some embodiments, the slits 112 may be angled at 15-45 degrees from the imaginary line P. In some embodiments, the slits 112 may be angled at 18-42 degrees from the imaginary line P. In some embodiments, the slits 112 may be angled at 20-40 degrees from the imaginary line P. In some embodiments, the slits 112 may be angled 22-38 from the imaginary line P. In some embodiments, the slits 112 may be angled at 25-35 degrees from the imaginary line P. In some embodiments, the slits 112 may be angled 28-32 from the imaginary line P. In some embodiments, the slits 112 may be angled at 29-30 degrees from the imaginary line P.

In some embodiments, the ratio of the length of the slit 112 to the outer diameter of the insertion tube body 111 is required to satisfy a predetermined condition, so as to ensure that the insertion tube body 111 has superior folding resistance, tensile resistance and torsion resistance. If the length of the slit 112 is too small and/or the outer diameter of the insertion tube body 111 is too large, the insertion tube body 111 cannot have the folding resistance, the tensile resistance, and the torsion resistance. If the length of the slit 112 is too large and/or the outer diameter of the insertion tube body 111 is too small, the insertion tube body 111 also cannot have the folding resistance, the tensile resistance, and the twisting resistance, and is easily broken or broken during use. Therefore, the ratio of the length of the slit 112 to the outer diameter of the insertion tube body 111 needs to be appropriate. In some embodiments, where the outer diameter of the insertion tube body 111 is 1mm to 12mm, the ratio of the length of the slits 112 to the outer diameter of the insertion tube body 111 may be in the range of 3 to 8.8. Wherein the outer diameter of the insertion tube body 111 is different according to its application. The outside diameter of the insertion tube body 111 is not limited in the present specification. In some embodiments, the ratio of the length of the slit 112 to the outer diameter of the insertion tube body 111 may be in the range of 3.5-8.5. In some embodiments, the ratio of the length of the slits 112 to the outer diameter of the insertion tube body 111 may be in the range of 4-8. In some embodiments, the ratio of the length of the slit 112 to the outer diameter of the insertion tube body 111 may be in the range of 4.5-7.5. In some embodiments, the ratio of the length of the slits 112 to the outer diameter of the insertion tube body 111 may be in the range of 5-7. In some embodiments, the ratio of the length of the slit 112 to the outer diameter of the insertion tube body 111 may be in the range of 5.5-6.5. In some embodiments, the ratio of the length of the slit 112 to the outer diameter of the insertion tube body 111 may be 6.

In some embodiments, the width of the slit 112 should satisfy a predetermined condition to ensure that the insert tube body 111 has superior folding resistance, tensile resistance and torsion resistance. If the width of the slit 112 is too small, the insertion tube body 111 cannot have the folding resistance, the tensile resistance, and the torsion resistance. If the width of the slit 112 is too large, the insertion tube body 111 also cannot have the folding resistance, the tensile resistance, and the torsion resistance, and is easily broken or broken during use. Therefore, the width of the slit 112 needs to be appropriate. In some embodiments, the width of the slits 112 may be 0.02mm to 2 mm. In some embodiments, the width of the slits 112 may be 0.05mm to 1.8 mm. In some embodiments, the width of the slits 112 may be 0.08mm to 1.7 mm. In some embodiments, the width of the slits 112 may be 0.1mm to 1.6 mm. In some embodiments, the width of the slits 112 may be 0.2mm to 1.5 mm. In some embodiments, the width of the slits 112 may be 0.3mm to 1.4 mm. In some embodiments, the width of the slits 112 may be 0.4mm to 1.3 mm. In some embodiments, the width of the slits 112 may be 0.5mm to 1.2 mm. In some embodiments, the width of the slits 112 may be 0.6mm to 1.1 mm. In some embodiments, the width of the slits 112 may be 0.7mm to 1.0 mm. In some embodiments, the width of the slits 112 may be 0.8mm to 0.9 mm.

In some embodiments, the length of the slit 112 is related to the outer diameter of the insertion tube body 111 and the angle of the slit 112 with respect to the direction perpendicular to the axis of the insertion tube body 111. In some embodiments, the length l of the kerf 112 can be expressed as:

where pi represents a circumferential ratio, D represents an outer diameter of the insertion pipe body 111, θ represents an angle of the slit 112 with respect to a direction perpendicular to the axis of the insertion pipe body 111, and a is a constant in a range of 1mm to 2 mm. By way of example, A may be 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, or the like.

In some embodiments, the plurality of slits 112 may be parallel to each other. As shown in fig. 4 and 5, the segment slits 112 are parallel to each other, that is, the angle between the segment slits 112 and the direction perpendicular to the axis of the insertion pipe body 111 may be equal. As shown in fig. 6, the zigzag slit 112 may include a first line segment slit 1121 and a second line segment slit 1122 which are connected. The first line segment slits 1121 of the plurality of zigzag slits 112 may be parallel to each other, and the second line segment slits 1122 may be parallel to each other. As shown in fig. 7, the arcs of the crescent slits 112 may be equal, and the arc lengths of the crescent slits 112 may be equal. In some embodiments, the included angles of the slits 112 and the direction perpendicular to the axis of the insertion tube body 111 may not be equal.

In some embodiments, the plurality of slits 112 provided on the insertion tube body 111 may be uniformly distributed in the axial direction of the insertion tube body 111. For example, any two adjacent slits 112 are equally spaced. In some embodiments, the pitch of any two adjacent slits 112 may be understood as the distance of any two adjacent slits 112 in the axial direction of the insertion pipe body 111. As shown in fig. 5, any two adjacent slits 112 are parallel to each other, and a line segment d indicates a distance between the two adjacent slits 112 in the axial direction, that is, a length of the line segment d indicates a distance between the two adjacent slits 112. In some embodiments, the slits 112 provided on the insertion tube body 111 may be unevenly distributed in the axial direction of the insertion tube body 111. As an example, the insertion tube body 111 may include a first end M and a second end N. The first end M is close to the snake bone body 121, and the second end N is far away from the snake bone body 121. The distance between two adjacent slits 112 on the insertion tube body 111 near the first end M may be smaller than the distance between two adjacent slits 112 on the insertion tube body 111 near the second end N. For example, the pitch of the adjacent two slits 112 may gradually increase from the first end M to the second end N in the axial direction of the insertion tube body 111. For another example, the plurality of slits 112 provided in the insertion pipe body 111 may include a first region slit, a second region slit, and a third region slit from the first end M to the second end N in the axial direction of the insertion pipe body 111. In some embodiments, the first region slits may include a plurality of slits 112 disposed in a portion of the region having a length a in the axial direction near the first end M. The third area slit may comprise slits 112 arranged in a part of the area having a length c in the axial direction near the second end N. The second region slits may include a number of slits 112 in the partial region having a length b in the axial direction between the first region slits and the third region slits. In some embodiments, the lengths of a, b, and c may or may not be equal. And the distance between two adjacent slits in the first area is d 1. The distance between two adjacent slits in the second area slits is d 2. The distance between two adjacent slits in the third area slit is d 3. In some embodiments, d1 < d2 < d3, i.e. the distance between two adjacent slits 112 may increase stepwise from the first end M to the second end N in the axial direction of the insertion tube body 111. In some embodiments, the spacing between adjacent slits in each of the three regions may also be non-uniform. For example, in at least one of the first region slit, the second region slit, and the third region slit, the distance between two adjacent slits gradually increases from the first end M to the second end N.

An embodiment of the present invention also provides a process for manufacturing an insertion portion for an endoscope, including: providing an insertion part base body, wherein the insertion part base body comprises a snake bone base body and an insertion pipe base body which are integrally formed. Based on the snake bone base body and the inserting pipe base body which are integrally formed, a plurality of bone sections and a plurality of cutting seams are respectively manufactured, and the snake bone body and the inserting pipe body which are integrally formed are obtained. The plurality of condyles and the plurality of slits may be formed by laser cutting. The outer walls of the insertion tube body and the snake bone body are respectively coated with a first braided layer and a second braided layer, and the first braided layer and the second braided layer can be integrally formed. And respectively coating the outer surfaces of the first woven layer and the second woven layer with a first soft adhesive layer and a second soft adhesive layer to obtain the insertion parts. The first soft rubber layer and the second soft rubber layer can be integrally formed.

The manufacturing process of the above embodiment not only omits a connecting process of the insertion tube body and the snake bone body, for example, a direct connecting process of the insertion tube body and the snake bone body, or a connecting process of the insertion tube body and the snake bone body through a connecting piece, but also omits connection of the first braided layer and the second braided layer, and connection of the first soft adhesive layer and the second soft adhesive layer. Because first weaving layer and second weaving layer integrated into one piece, first soft glue layer and second soft glue layer integrated into one piece can make the protruding and/or sunken of the no linkage part of portion of inserting of preparation, can further increase the operable space of portion of inserting, can also improve the intensity of portion of inserting, breaking occur or damage when avoiding using.

Embodiments of the present description also provide an endoscope, which may include the insertion portion according to any of the embodiments of the present description. In some embodiments, the endoscope may further include a pull cord, an operating portion, and a lens module. The haulage rope sets up in the portion inside the insertion portion, and the one end of haulage rope is fixed in the one end that the insertion tube was kept away from in snake bone portion, and the other end and the operation portion of haulage rope are connected. The lens module can be arranged at one end of the snake bone part far away from the insertion tube and is used for directly checking pathological changes of relevant parts or parts to be checked. One end of the insertion part far away from the snake bone part can be connected with an operation part, and the operation part can comprise an operation handle. The operator can control operating handle, through the tensioning of the stay cord of control intubate and inside snake bone portion or the degree of relaxing, controls the crooked degree or the rotation direction of intubate and snake bone portion to make the intubate can get into and wait to detect the space, in order to make things convenient for the inspection or detect and wait to inspect the position or wait to detect the part.

The beneficial effects that may be brought by the embodiments of the present application include, but are not limited to: (1) a plurality of cutting seams are distributed on the inserting pipe body at intervals, so that the inserting pipe body has better breaking resistance, tensile resistance and twisting resistance; (2) the wall thickness of the insertion tube can be in the range of 0.2mm-0.3mm, the outer diameter of the insertion tube can be reduced, the operable space of an operator can be enlarged, and the pain of a patient can be reduced for a medical endoscope; (3) the snake bone body and the insertion pipe body are integrally formed, so that not only can a connecting part between the snake bone body and the insertion pipe body be omitted, but also a connecting process (such as bonding or welding) can be omitted, and projections and/or depressions at two ends of the connecting part can be eliminated, so that the strength of the insertion part is further improved, and the occurrence of fracture or damage in use is avoided; (4) first weaving layer and second weaving layer integrated into one piece, first soft glue layer and second soft glue layer integrated into one piece can make the portion of inserting do not have the protruding and/or sunken of coupling part, further increase the operable space of portion of inserting, can also improve the intensity of portion of inserting. It is to be noted that different embodiments may produce different advantages, and in different embodiments, any one or combination of the above advantages may be produced, or any other advantages may be obtained.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be regarded as illustrative only and not as limiting the present specification. Various modifications, improvements and adaptations to the present description may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present specification and thus fall within the spirit and scope of the exemplary embodiments of the present specification.

Also, the description uses specific words to describe embodiments of the description. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the specification is included. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the specification may be combined as appropriate.

Claims

1. An insertion portion for an endoscope, characterized in that the insertion portion comprises a snake bone portion and an insertion tube;

the insert tube comprises an insert tube body and a first soft adhesive layer coated on the outer wall of the insert tube body;

the snake bone part comprises a snake bone body and a second soft rubber layer coated on the outer wall of the snake bone body;

the snake bone body and the insertion pipe body are integrally formed;

the inserting pipe body is provided with a plurality of cutting seams; the plurality of slits are distributed at intervals along the axial direction of the insertion pipe body.

2. The insertion section for an endoscope according to claim 1, wherein a hardness of said first soft rubber layer is larger than a hardness of said second soft rubber layer.

3. The insertion section for an endoscope according to claim 1,

the insertion tube further comprises a first braid layer coated on the outer wall of the insertion tube body; the first woven layer is positioned between the outer wall of the insertion tube body and the first soft rubber layer;

the snake bone part also comprises a second braided layer coated on the outer wall of the snake bone body; the second weaving layer is located between the outer wall of the snake bone body and the second soft rubber layer.

4. The insertion section for an endoscope according to claim 1, characterized in that the wall thickness of said insertion tube is in the range of 0.15mm-0.4 mm.

5. The insertion section for an endoscope according to claim 1, wherein a material of the snake bone body and the insertion tube body includes stainless steel or plastic.

6. The insertion portion for an endoscope of claim 1, wherein said slit is formed by laser cutting or wire cutting.

7. The insertion portion for an endoscope according to claim 1, wherein said slit is angled at an angle of 15 ° to 45 ° from a direction perpendicular to an axis of said insertion tube body.

8. The insertion portion for an endoscope of claim 1, wherein a ratio of a length of the slit to an outer diameter of the insertion tube body is in a range of 3-8.8.

9. The insertion portion for an endoscope of claim 1, wherein said plurality of slits are parallel to each other.

10. The insertion portion for an endoscope according to claim 1, wherein said slits are uniformly distributed in an axial direction of said insertion tube body.

11. The insertion portion for an endoscope according to claim 1, wherein said plurality of slits are unevenly distributed in an axial direction of said insertion tube body.

12. The insertion section for an endoscope of claim 11, wherein said insertion tube body includes a first end and a second end, said first end being adjacent said snake body and said second end being distal from said snake body, wherein a distance between adjacent two of said slits on said insertion tube body adjacent said first end is less than a distance between adjacent two of said slits on said insertion tube body adjacent said second end.

13. The insertion section for an endoscope according to claim 12, wherein a pitch of the adjacent two slits is gradually increased from the first end to the second end in an axial direction of the insertion tube body.

14. The insertion section for an endoscope according to claim 12, wherein a pitch of the adjacent two slits increases stepwise from the first end to the second end in an axial direction of the insertion tube body.

15. An endoscope, characterized by comprising an insertion section for an endoscope according to any one of claims 1 to 14.