WO2023125138A1

WO2023125138A1 - Elastic tube, detector insertion structure and flexible detector

Info

Publication number: WO2023125138A1
Application number: PCT/CN2022/140281
Authority: WO
Inventors: 杨梦健
Original assignee: 微创优通医疗科技（上海）有限公司
Priority date: 2021-12-30
Filing date: 2022-12-20
Publication date: 2023-07-06
Also published as: CN217066330U

Abstract

An elastic tube, a detector insertion structure and a flexible detector. The flexible detector comprises a handle, a detector insertion structure and a camera module which are connected in sequence; the detector insertion structure comprises an elastic tube, the elastic tube is provided with a spiral cutting groove (1) extending in the circumferential direction of the elastic tube and extending in the axial direction of the elastic tube, the spiral cutting groove (1) comprises a first groove wall (11) and a second groove wall (12) which are oppositely arranged, and one or more bending limiting structures (2) are formed on the two groove walls; the bending limiting structure (2) comprises a first protruding portion (21) and a second protruding portion (22), and when the elastic tube is axially bent to a maximum angle, the first protruding portion (21) and the second protruding portion (22) in at least one bending limiting structure are mutually locked so that the bending angle of the elastic tube can be limited, which solves the problem of infinite bending of the elastic tube, reduces the risk of deformation and breakage of the elastic tube, and prolongs the service life of the elastic tube.

Description

Elastic tube, probe insertion structure and flexible probe

technical field

The present application relates to the technical field of medical devices, in particular to an elastic tube, a probe insertion structure and a flexible probe.

Background technique

At present, in the field of endoscopes, the main body of the endoscope is mostly made of plastic tubes or metal tubes. Among them, the plastic tubes are mainly produced by the plastic extrusion process. The performance of the plastic tubes produced by this process is relatively consistent in different positions and cannot be adapted to Each location requires different performance applications. In addition, the production process of plastic pipes is complex and the processing cycle is long, resulting in low production efficiency. Metal pipes are mainly obtained by cutting lines on the pipe. Metal pipes can be cut with different lines at different positions on the pipe, so that different positions of the metal pipe have different properties, but the lines on the metal pipe are more complicated and the production cycle is longer. , and most of these metal tubes do not have any limit when they are bent, so they are more prone to breakage and deformation, which shortens the service life of the metal tube and increases the cost of using the main body in the endoscope.

Contents of the invention

In order to solve the technical problems existing in the prior art, the purpose of this application is to provide an elastic tube, a detector insertion structure and a flexible detector, which overcome the problem of the existing detector main body bending without limit.

To achieve the above object, the present application provides an elastic tube, which has a helical cutting groove extending around the circumference of the elastic tube and along the axial direction of the elastic tube, and the helical cutting groove includes opposite first groove walls and the second groove wall, the first groove wall and the second groove wall form one or more bending limiting structures;

The bending limiting structure includes a first protrusion and a second protrusion, the first protrusion is formed by extending from the first groove wall to the second groove wall, and the second protrusion part is formed by extending from the second groove wall to the side of the first groove wall; when the elastic tube is axially bent to a maximum angle, at least one of the first protruding part and the first protrusion in the bending limiting structure The second protrusions are interlocked.

Optionally, the first protrusion has a groove, and the second protrusion moves relative to the first protrusion in the groove.

Optionally, the first protrusion is L-shaped or T-shaped.

Optionally, the second protrusion is L-shaped or T-shaped.

Optionally, the bending limiting structure includes two first protrusions and one second protrusion, and the second protrusion is arranged on the edge formed by the two first protrusions. in the groove.

Optionally, the first protruding portion has a first surface, the second protruding portion has a second surface, the first surface and the second surface are oppositely arranged with a gap reserved, the first protruding portion The first protruding part and the second protruding part are interlocked by abutting against the second surface.

Optionally, the bending limiting structures in two adjacent turns of the helical cutting groove along the axial direction of the elastic tube are staggered in the circumferential direction of the elastic tube.

Optionally, at least one twist limiting structure is formed on the first groove wall and the second groove wall, and the twist limiting structure includes a recess and a third protrusion inserted into the recess; The recessed portion is formed by one of the first groove wall and the second groove wall, and the other of the first groove wall and the second groove wall forms the third protrusion; When the elastic tube is twisted circumferentially, the concave portion and the third protruding portion remain relatively stationary in the circumferential direction.

Optionally, there are multiple twist limiting structures and bending limiting structures, all the twist limiting structures are arranged at intervals in the extending direction of the spiral cutting groove, and two adjacent ones One bending limiting structure is arranged between the twisting limiting structures.

To achieve the above purpose, the present application also provides a detector insertion structure, including any one of the elastic tubes.

To achieve the above purpose, the present application also provides a flexible detector, which includes a handle connected in sequence, the detector insertion structure, and a camera module.

In the elastic tube, detector insertion structure and flexible detector provided by the present application, at least one bending limiting structure is provided on the elastic tube, and the first protrusion and the second protrusion in the at least one bending limiting structure The parts can generate relative movement synchronously when the elastic tube is axially bent. When the elastic tube is axially bent to a certain angle, the first protruding part and the second protruding part can be locked with each other, thereby limiting the maximum bending angle of the elastic tube, thereby solving the problem that the elastic tube is bent indefinitely in the axial direction. And it can reduce the risk of deformation and fracture of the elastic tube, and prolong the service life of the elastic tube. At the same time, the elastic tube simplifies the complexity of cutting lines in the metal elastic tube, has lower processing cost and shorter production cycle, and has higher economic benefits. In addition, the elastic tube can also have good adaptability, can be conveniently applied in various products, and has relatively flexible application scenarios.

In the elastic tube, detector insertion structure and flexible detector provided by the present application, at least one torsion limiting structure is used to ensure that the elastic tube smoothly transmits torsional force in the axial direction, thereby solving the problem of poor torsion resistance of the elastic tube Problems, to avoid deformation and damage of the elastic tube when it is twisted, and further prolong the service life of the elastic tube.

Description of drawings

Fig. 1 is the front view of elastic tube in the preferred embodiment of the present application;

Fig. 2 is a schematic diagram of the unfolded structure of the helical cutting groove in the preferred embodiment of the present application.

In the figure: spiral cutting groove 1; first groove wall 11; second groove wall 12; bending stop structure 2; first protrusion 21; first surface 211; second protrusion 22; second surface 221; gap 23 ; third protrusion 31 .

Detailed ways

The present application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present application will become clearer from the following description. It should be noted that the drawings are all in very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present application.

In the description of the present application, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "front", "rear", "left", "right", " Vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be configured in a specific orientation. and operation, and therefore should not be construed as limiting the application.

In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limited. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The application will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the case of no conflict, the following embodiments and the features in the embodiments may complement each other or be combined with each other.

As shown in FIGS. 1-2 , a preferred embodiment of the present application provides an elastic tube, which is cut from a metal tube and can be bent in the axial direction. In a preferred embodiment, the elastic tube is a main body on a flexible probe such as an endoscope. Of course, in other embodiments, the elastic tube can also be used in other devices that require bending and twisting.

The elastic tube is cut to form a helical cutting groove 1, the helical cutting groove 1 extends around the circumference of the elastic tube and along the axial direction of the elastic tube, and the helical cutting groove 1 includes an opposite first groove The wall 11 and the second groove wall 12, the first groove wall 11 and the second groove wall 12 are formed with at least one bending limiting structure 2; the bending limiting structure 2 includes a first protrusion 21 and a second protrusion Stretching portion 22, the first protruding portion 21 is formed by extending from the first groove wall 11 to the second groove wall side, and the second protruding portion 22 is formed by extending from the second groove wall 12 to the first groove wall side; when the elastic When the tube is axially bent to a maximum angle, the first protruding portion 21 and the second protruding portion 22 in at least one bending limiting structure can approach each other until they are locked together.

In order to make the elastic tube have an axial bending limit ability, the applicant cuts the elastic tube to form a helical cutting groove 1, and the helical cutting groove 1 can form a helically wound multi-turn structure on the circumferential outer wall of the elastic tube, and the helical The cutting groove 1 has a first groove wall 11 and a second groove wall 12 formed by cutting, and at least one bending limiting structure 2 is formed on the first groove wall 11 and the second groove wall 12 . That is to say, the helical cutting groove 1 can be regarded as the cutting path on the elastic tube, the two sides of the cutting path are the groove walls of the helical cutting groove 1, and the groove wall of the specific shape can be obtained by cutting, and the groove wall of the specific shape The wall includes at least one bending limiting structure 2 . Specifically, when the elastic tube is axially bent, the first groove wall 11 and the second groove wall 12 are axially deformed and away from each other, and the first protruding portion 21 and the second protruding portion 22 can follow the first protruding portion respectively. The first groove wall 11 and the second groove wall 12 are displaced to move relative to each other, and can be locked with each other when they move to a limit position, thereby limiting the maximum bending angle of the elastic tube. Such setting not only solves the problem of unlimited axial bending of the elastic tube, but also limits the bending angle of the elastic tube within a certain range, reduces the risk of deformation and fracture of the elastic tube, and prolongs the service life of the elastic tube. Simultaneously, it also simplifies the complexity of making the cutting lines in the metal elastic tube, has lower processing cost and shorter production cycle, and has higher economic benefits. In addition, the elastic tube can also have good adaptability, can be conveniently applied in various products, and has relatively flexible application scenarios.

It should be understood that when the bending force (that is, the axial bending force of the elastic tube) subjected to the elastic tube is small, the first protrusion 21 and the second protrusion 22 in each bending limiting structure 2 move relatively. not in actual contact; but when the bending force suffered by the elastic tube is greater than the preset threshold, on the stretched side of the elastic tube, the first protruding part 21 and the second protruding part 21 in each bending limiting structure 2 The protruding parts 22 abut against each other to form a locked state to limit their respective movements, so that the elastic tube cannot continue to bend. At this time, the elastic tube obtains the maximum bending angle and can bear a certain bending force in the bending direction . Specifically, when the elastic tube is bent, one side of the elastic tube is stretched under force, so that the first protruding part 21 and the second protruding part 21 in at least one bending limiting structure on the groove wall on the stretched side of the elastic tube The extension parts 22 are close to each other until they are locked together, so as to limit the position in the bending direction when the elastic tube is bent to the maximum angle. The two protruding parts 22 keep their original positions unchanged due to no tensile force.

It should be understood that the present application does not limit the specific structure of the bending limiting structure 2, and the bending limiting structure 2 only needs to have a first protruding portion 21 and a second protruding portion 22 that can limit each other in the bending direction of the elastic tube That's it. It should also be understood that the present application does not limit the shapes of the first protruding portion 21 and the second protruding portion 22, for example, the first protruding portion 21 and the second protruding portion 22 may be independently L-shaped or T-shaped, etc. , it can be understood here that both the first protruding portion 21 and the second protruding portion 22 are L-shaped or both are T-shaped, or one of the protruding portions is L-shaped and the other is T-shaped.

This embodiment also provides a detector insertion structure (not shown), including the elastic tube. Further, this embodiment also provides a flexible detector (not shown), including a handle connected in sequence, a detector insertion structure and a camera module. In practice, the elastic tube can be inserted into the body and bent or twisted to detect or treat disease. It should be understood that the flexible detector involved in the embodiment of the present application includes but is not limited to an endoscope. This application uses an endoscope as an example to illustrate the structural characteristics of the elastic tube, but those skilled in the art should know that the elastic tube can also be It is used in flexible detectors in other medical and industrial fields.

In one embodiment, the first protruding part 21 has a groove (not labeled), and the second protruding part 22 moves relative to the first protruding part 21 in the groove. Preferably, the first protrusion 21 is disposed on at least one side of the second protrusion 22 along the circumferential direction of the elastic tube. When the elastic tube is bent, the second protrusion 22 moves in the groove; 22 The first protrusions 21 on at least one side are interlocked and limited, so as to limit the bending angle of the elastic tube.

Referring to FIG. 1, in this embodiment, the bending limiting structure includes two first protrusions 21 and one second protrusion 22, that is, the second protrusion 22 extends along the circumferential direction of the elastic tube. A first protruding portion 21 is respectively provided on both sides, and the second protruding portion 22 is disposed in the groove formed by the two first protruding portions 21 . Such setting, on the one hand, can make the second protruding part 22 and the first protruding part 21 on both sides can be interlocked and limited, so that when the elastic tube reaches the maximum bending angle, the first protruding part 21 and the first protruding part 21 can be enlarged. The contact area of the second protrusion 22 improves the bending force carried by the elastic tube in the bending direction; on the other hand, even if the first protrusion 21 on one side of the second protrusion 22 is damaged, the other side The first protruding portion 21 can also be locked with the second protruding portion 22 , thereby further ensuring the bending limiting ability of the elastic tube.

Further, the first protruding part 21 can be symmetrically or asymmetrically arranged on both sides of the second protruding part 22 along the circumferential direction of the elastic tube, preferably symmetrically, so as to reduce the processing difficulty of the bending limiting structure 2 and improve Cutting efficiency of elastic tubes.

Continuing to refer to FIG. 1 and FIG. 2, the first protrusion 21 has a first surface 211, the second protrusion 22 has a second surface 221, the first surface 211 and the second surface 221 are oppositely arranged and a gap 23 is reserved, The abutment of the first surface 211 and the second surface 221 makes the first protruding portion 21 and the second protruding portion 22 interlock. In this embodiment, the first protruding portion 21 is an L-shaped structure, the second protruding portion 22 is a T-shaped structure, and the first surface 211 of the first protruding portion 21 and the second surface of the second protruding portion 22 The surfaces 221 are disposed face to face in the axial direction. When the elastic tube is bent, the first protruding portion 21 and the second protruding portion 22 move closer to each other, that is, the first surface 211 and the second surface 221 move closer to each other; as the bending angle of the elastic tube increases, The first surface 211 and the second surface 221 finally contact and limit the position. At this time, a surface contact is formed between the first protruding part 21 and the second protruding part 22, which can further increase the bending of the elastic tube in the bending direction. The folding force can also avoid damage or abrasion due to the small contact area of the first protruding part 21 or the second protruding part 22, thereby prolonging the service life of the elastic tube. In addition, the setting of the gap 23 can also make the elastic tube have a certain displacement when it is subjected to axial tension; and when the elastic tube is stretched to a certain distance, the first surface 211 and the second surface 221 can abut and limit Position, so that the elastic tube cannot be stretched further in the axial direction, thereby limiting the stretching distance of the elastic tube in the axial direction, so that the elastic tube can be used in occasions where stretching is required.

Referring to Fig. 1, the helical cutting groove 1 is formed around the circumference of the elastic tube, and forms multiple turns in the axial direction of the elastic tube, wherein the bending limiting structures 2 in two adjacent turns are staggered in the circumferential direction of the elastic tube. . The "staggered arrangement" here means that the projections of the bending limiting structures 2 on the same plane perpendicular to the axis of the elastic tube in two adjacent turns do not completely coincide. In this way, the elastic tube can be bent in different directions to meet different bending requirements of the elastic tube.

Further, there are usually a plurality of bending limiting structures 2, which are arranged at intervals in the helical extension direction, and the projections of all bending limiting structures 2 on the axial end of the elastic tube can surround the elastic tube for a week, so that the elastic tube can Bending at any angle (that is, the elastic tube can be bent in the circumferential direction of 360°), when the elastic tube is used as the main body of the endoscope, the elastic tube so arranged can be more flexible after the endoscope enters the human body working. In addition, the elastic tube can also be applied to various devices that need to be bent, thereby expanding the usage scenarios of the elastic tube.

It should be known that when the elastic tube is bent, if the length of the gap 23 between the first surface 211 and the second surface 221 in the axial direction of the elastic tube is different, the maximum bending angle of the elastic tube will be different. Specifically, when the elastic tube is bent, the first groove wall 11 and the second groove wall 12 move relatively thereupon, so that the first protruding portion 21 and the second protruding portion 22 move synchronously until they are locked together. When the gap 23 between the first surface 211 and the second surface 221 is large, the first protruding portion 21 and the second protruding portion 22 can have a relatively large displacement before being locked together. At this time, the elastic tube The bendable angle is larger, that is, the maximum bending angle when the elastic tube is bent is larger. Similarly, when the gap 23 between the first surface 211 and the second surface 221 is small, the first protruding portion 21 and the second protruding portion 22 have a smaller displacement before being locked together. The angle at which the elastic tube can be bent is relatively small, that is, the maximum bending angle of the elastic tube is relatively small.

Therefore, when setting the bending limiting structure 2 on the elastic tube, the length of the gap 23 between the first surface 211 and the second surface 221 can be set according to the bending angle requirements of the elastic tube, so that the maximum bending angle of the elastic tube can satisfy Different usage requirements. In addition, for elastic tubes that require different bending requirements at different positions, different lengths of gaps 23 can be set in different turns of the helical cutting groove 1 of the elastic tube. At this time, different turns of the helical cutting groove 1 on the elastic tube can It has different bending capabilities, so that different positions of the elastic tube in the axial direction have different bending angles, so as to meet the complex use requirements of the elastic tube.

Referring to FIG. 1 , in the front view of the elastic tube, the distance W between adjacent circles in the helical cutting groove 1 is the pitch of the elastic tube. When the pitch of the elastic tube is large, the number of turns of the helical cutting groove 1 in the elastic tube with the same length is relatively small, that is, the number of bending stop structures 2 in the elastic tube is small at this time, and when each When the bendable angle of a bending limiting structure 2 is the same, the total angle that the elastic tube can bend (that is, the common bending angle of all the loops of the elastic tube) is smaller, that is, the elastic tube at this time can be bent at a smaller angle; the same , when the pitch of the elastic tube is small, the number of turns of the helical cutting groove 1 in the elastic tube under the same length is relatively large, that is, the number of bending limiting structures 2 in the elastic tube is large at this time, when each When the bending angles of a bending limiting structure 2 are the same, the total bending angle of the elastic tube (ie, the common bending angle of all the loops of the elastic tube) is larger, that is, the elastic tube at this time can be bent at a larger angle.

Therefore, when designing the elastic tube, the total bending angle of the elastic tube can be adjusted by setting different pitches, so that the elastic tube can adapt to bending requirements in different occasions. In addition, the elastic tube can also be provided with different pitches in different areas, so that when the elastic tube is bent, different areas have different bending angles, so as to meet the bending requirements of different areas of the elastic tube, and realize the flexibility and flexibility of the elastic tube design. Diversity, and make the elastic tube have good adaptability, and then can be conveniently applied in various products, so that the application range of the elastic tube is wider. It should be understood that the "area" herein refers to a section in the elastic tube, and the "different areas" of the elastic tube refer to different sections located in different positions.

Preferably, the first groove wall 11 and the second groove wall 12 are also formed with at least one twist limiting structure, the twist limiting structure includes a recess (not labeled) and a third protrusion 31 inserted into the recess . When the elastic tube twists in the circumferential direction, the concave portion and the third protruding portion 31 remain relatively stationary in the circumferential direction, so as to prevent the relative movement of the elastic tube in the circumferential direction, so that the elastic tube is twisted as a whole after being subjected to torsion. In this embodiment, the concave portion is formed by the first groove wall 11 , and the third protruding portion 31 is formed by the second groove wall 12 . In another embodiment, the third protruding portion 31 can also be formed by the first groove wall 11 , and the concave portion is formed by the second groove wall 12 . Such arrangement can enable the elastic tube to pass through the engagement of the recessed part and the third protruding part 31 when it is twisted, so that the torsional force of the elastic tube can be smoothly transmitted in the axial direction, that is, the entire elastic tube can be twisted when twisted. It can be twisted together, thereby solving the problem of poor torsion resistance of the elastic tube, avoiding deformation and damage when the elastic tube is twisted, and prolonging the service life of the elastic tube.

Specifically, when one end of the elastic tube is twisted, the concave part or the third protruding part 31 in the twist limiting structure on the twisted side is twisted, and can drive the twist limiting structure that engages with it and is away from the one end of the elastic tube. The third protruding part 31 or the recessed part in the structure is twisted accordingly, and at this time, the recessed part or the third protruding part 31 on the other side of the twist limiting structure away from the end of the elastic tube can be twisted synchronously, and can Drive the third protruding part 31 or the recessed part of the twist-limiting structure that engages with it and is further away from the one end of the elastic tube to twist accordingly, and so on, so that the torsional force at one end of the elastic tube can be smoothly transmitted to the other end of the elastic tube At one end, the synchronous torsion of the entire elastic tube can be realized, and the torsion resistance (ie, the ability to resist torsion) of the elastic tube can be improved.

It should be known that, during the processing of the elastic tube, the elastic tube can be cut in the helical direction of the helical cutting groove 1 to form the concave portion and the third protruding portion 31 that can engage with each other.

Preferably, the concave portion is formed by the first groove wall 11, the first protruding portion 21 and the concave portion are sequentially arranged in the extending direction of the first groove wall 11, and the third protruding portion 31 is formed by the second groove wall 12. Formed, the third protruding part 31 and the second protruding part 22 are sequentially arranged in the extending direction of the second groove wall 12. At this time, a plurality of bending limiting structures 2 and Multiple torsion limiting structures reduce the complexity of cutting lines in the elastic tube, simplify the processing difficulty of the elastic tube, thereby reducing the processing cost and production cycle of the elastic tube, and have high economic benefits.

The present application does not limit the connection sequence of the multiple bending limiting structures 2 and the twist limiting structures on the helical cutting groove 1 , and the connecting sequence of the multiple bending limiting structures 2 and the multiple twist limiting structures can be set as required.

In one embodiment, all twist limiting structures are arranged at intervals in the extending direction of the helical cutting groove 1, and one or more bending limiting structures 2 are arranged between two adjacent twist limiting structures to ensure that the elastic tube Under the premise of excellent torsional performance, the bending limiting ability of the elastic tube is improved through multiple bending limiting structures 2 .

In another embodiment, all the bending limiting structures 2 are arranged at intervals in the extending direction of the helical cutting groove 1, and one or more twisting limiting structures are arranged between two adjacent bending limiting structures 2 to ensure On the premise of the bending limit ability of the elastic tube, the torsion resistance performance of the elastic tube is improved through multiple torsion limit structures.

Referring to Fig. 2, in this embodiment, there are multiple torsion-limiting structures and bending-limiting structures 2, and all torsion-limiting structures are arranged at intervals in the extending direction of the helical cutting groove 1, and adjacent two A bending limit structure 2 is arranged between two twist limit structures, that is, a plurality of bend limit structures 2 and a plurality of twist limit structures are arranged at intervals in the extending direction of the helical cutting groove 1, so that each circle of the helical cutting groove can be guaranteed 1. Both have good bending limit ability and anti-torsion ability, and can ensure the consistent performance of each position of the elastic tube, so as to avoid damage to some areas of the elastic tube when it is bent or twisted, and prolong the service life of the elastic tube.

To sum up, the elastic tube provided by the present application is provided with at least one bending limiting structure 2, and the first protruding part 21 and the second protruding part 22 in at least one bending limiting structure 2 can generate relative movement synchronously when bending. . When the elastic tube is bent to a certain angle, the first protruding part 21 and the second protruding part 22 can be interlocked to limit the maximum bending angle of the elastic tube, thereby solving the problem of the elastic tube bending without limit, and The risk of deformation and breakage of the elastic tube is reduced, and the service life of the elastic tube is extended. At the same time, it simplifies the complexity of cutting lines in the metal elastic tube, has lower processing cost and shorter production cycle, and has higher economic benefits. In addition, the elastic tube can also have good adaptability, can be conveniently applied in various products, and has relatively flexible application scenarios.

The elastic tube provided by this application can also make the elastic tube smoothly transmit torsional force in the axial direction through the setting of the torsion limiting structure, thereby solving the problem of poor torsion resistance of the elastic tube and avoiding deformation and damage of the elastic tube when it is twisted , prolong the service life of the elastic tube.

The above description is only a description of the preferred embodiments of the application, not any limitation on the scope of the application. Any changes and modifications made by those of ordinary skill in the field of the application based on the above disclosures belong to the protection scope of the application.

Claims

An elastic tube, characterized in that it has a helical cutting groove extending around the circumference of the elastic tube and along the axial direction of the elastic tube, and the helical cutting groove includes a first groove wall and a second groove that are oppositely arranged wall, the first groove wall and the second groove wall form one or more bending limiting structures;

The bending limiting structure includes a first protrusion and a second protrusion, the first protrusion is formed by extending from the first groove wall to the second groove wall, and the second protrusion part is formed by extending from the second groove wall to the side of the first groove wall; when the elastic tube is axially bent to a maximum angle, at least one of the first protruding part and the first protrusion in the bending limiting structure The second protrusions are interlocked.
The elastic tube according to claim 1, wherein the first protrusion has a groove, and the second protrusion moves relative to the first protrusion in the groove.
The elastic tube according to claim 2, wherein the first protrusion is L-shaped or T-shaped.
The elastic tube according to claim 2 or 3, wherein the second protrusion is L-shaped or T-shaped.
The elastic tube according to claim 2, wherein the bending limiting structure includes two of the first protrusions and one of the second protrusions, and the second protrusion is arranged at In the groove formed by the two first protrusions.
The elastic tube according to claim 1, wherein said first protrusion has a first surface, said second protrusion has a second surface, and said first surface is opposite to said second surface. A gap is provided and reserved, and the first surface and the second surface abut against each other so that the first protruding portion and the second protruding portion are locked together.
The elastic tube according to claim 1, characterized in that, the bending limiting structures in two adjacent turns of the helical cutting groove along the axial direction of the elastic tube are staggered in the circumferential direction of the elastic tube.
The elastic tube according to claim 1, wherein the first groove wall and the second groove wall are further formed with at least one twist limiting structure, and the twist limiting structure includes a recess and is inserted into the a third protrusion of a depression; the depression is formed by one of the first and second groove walls, the other of the first and second groove walls The other forms the third protruding portion; when the elastic tube is twisted in the circumferential direction, the concave portion and the third protruding portion remain relatively stationary in the circumferential direction.
The elastic tube according to claim 8, characterized in that the number of the twist limiting structure and the bending limiting structure are multiple, and all the twist limiting structures are in the extending direction of the spiral cutting groove The upper part is arranged at intervals, and one bending limiting structure is arranged between two adjacent twisting limiting structures.
A detector insertion structure, characterized by comprising the elastic tube according to any one of claims 1-9.
A flexible detector, characterized by comprising sequentially connected handles, the detector insertion structure according to claim 10, and a camera module.