CN219516182U - Endoscope bending tube and endoscope - Google Patents

Abstract

The utility model discloses an endoscope bending tube and an endoscope, and relates to the technical field of medical instruments. The endoscope bending tube comprises a first tube section, wherein the first tube section comprises a plurality of first spiral cutting seams which are not communicated with each other and are arranged along a first spiral travel line at the outer periphery of the first tube section, and a plurality of second spiral cutting seams which are not communicated with each other and are arranged along a second spiral travel line at the outer periphery of the first tube section; the first spiral slits and the second spiral slits are alternately arranged in the axial direction of the first pipe section, and projection lines on the cross section of the first pipe section are oppositely arranged. The utility model directly processes the spiral kerf structure on the pipe section to realize the bending of the bending pipe structure, has low manufacturing cost, convenient processing, no separation problem and can improve the reliability of use, wherein the spiral kerfs extend along the spiral line and are arranged at intervals, thus realizing active bending and/or passive bending, and simultaneously effectively ensuring the axial stability of the bending pipe, so that the bending pipe is not easy to be elongated or compressed.

Description

Endoscope bending tube and endoscope

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an endoscope bending tube and an endoscope.

Background

The medical endoscope is mainly used for observing the target position in the human body and performing auxiliary minimally invasive or noninvasive treatment, and because the human body channel is complex to bend, a bending tube structure is arranged at the front end of the insertion part to ensure that the target position can be reached smoothly in order to ensure the endoscope.

The bending tube of the endoscope widely used at present is formed by connecting bending tube units which are manufactured independently one by one through rotating pins, the manufacturing cost is higher, and the rotating pins are required to be additionally used for connecting the bending tube units, so that if the rotating pins are loosened in the using process, the normal use of the endoscope can be influenced.

Therefore, how to provide a curved tube structure with lower manufacturing cost and more reliable use is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, an object of the present utility model is to provide an endoscope bending tube and an endoscope including the same, which are manufactured at a low cost and are more reliable in use.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

an endoscope bending tube comprises a first tube section, wherein the first tube section comprises a plurality of first spiral kerfs which are not communicated with each other and are formed along a first spiral travel line of the outer periphery of the first tube section, and a plurality of second spiral kerfs which are not communicated with each other and are formed along a second spiral travel line of the outer periphery of the first tube section;

wherein the first spiral kerf and the second spiral kerf are alternately arranged in the axial direction of the first pipe section, and projection lines on the cross section of the first pipe section are oppositely arranged.

Illustratively, the projection lines of the first and second helical slits on the cross section of the first tube segment are symmetrical about a first axis that passes through the center of the cross section of the first tube segment.

Illustratively, the length of the projection of the first and second helical slits on the cross-section of the first tube segment is greater than 1/2 of the circumference of the first tube segment.

Illustratively, the projection lines of the first and second helical slits on the cross section of the first tube segment have overlapping portions.

Illustratively, the end of the first helical slit is provided with a first enlarged end hole and/or the end of the second helical slit is provided with a second enlarged end hole.

Illustratively, the first helical flight line and the second helical flight line have the same helical direction and pitch profile characteristics.

Illustratively, the first pipe segment has a head end and a tail end, the first helical travel line and the second helical travel line having a pitch that is less in a first predetermined interval proximate the head end than in a second predetermined interval proximate the tail end.

Illustratively, the first pipe segment further comprises: a plurality of third helical slits formed along a third helical path of the outer periphery thereof and a plurality of fourth helical slits formed along a fourth helical path of the outer periphery thereof; wherein:

the first spiral kerf, the second spiral kerf, the third spiral kerf and the fourth spiral kerf are alternately arranged in the axial direction of the first pipe section, or the first spiral kerf, the third spiral kerf, the second spiral kerf and the fourth spiral kerf are alternately arranged in the axial direction of the first pipe section;

the third helical slit is disposed opposite the projection of the fourth helical slit on the cross section of the first tube segment and is offset from the projection of the first helical slit and the second helical slit on the cross section of the first tube segment.

Illustratively, the projection lines of the first and second helical slits on the cross section of the first tube segment are symmetrical about a first axis;

the projection lines of the third spiral kerf and the fourth spiral kerf on the cross section of the first tube segment are symmetrical about a second axis;

the first shaft and the second shaft each pass through the center of the cross section of the first pipe section, and are staggered by a preset angle in the circumferential direction of the first pipe section.

The preset angle is, for example, 90 °.

Illustratively, the first helical slit, the second helical slit, the third helical slit, and the fourth helical slit are identical in structure.

Illustratively, the first helical slit is a linear slit located on the first helical travel line; the second spiral kerf is a linear slit located on the second spiral travel line.

Illustratively, the method further comprises: a second tube segment connected to the first tube segment; the second pipe section comprises a plurality of first step-shaped slits which are not communicated with each other and are formed around a fifth spiral travel line on the periphery of the second pipe section, and a plurality of second step-shaped slits which are not communicated with each other and are formed around a sixth spiral travel line on the periphery of the second pipe section;

the first step-shaped slits and the second step-shaped slits are alternately arranged in the axial direction of the second pipe section, and projection lines on the cross section of the second pipe section are oppositely arranged;

the first step-type slit and the second step-type slit have the same structure, including: two main slits extending along the circumferential direction of the second pipe section and a connecting slit connecting the two main slits, the free ends of the two main slits being located on the corresponding helical travel lines.

An endoscope comprising the endoscope bending tube of any of the embodiments above.

The endoscope bending tube provided by the utility model has the beneficial effects that:

in the bending tube, the joint-cutting structure is directly processed on the endoscope bending tube so as to realize bending of the bending tube structure, compared with the prior art that a rotating pin is required to be purchased in addition to be axially connected with each bending tube unit, the joint-cutting structure is integrally arranged on the endoscope bending tube, the manufacturing cost is very low, the processing is convenient, the integral structure can not have separation problems, the reliability of use can be improved, in addition, the spiral joint-cutting structure is arranged at intervals along the spiral line in an extending manner, and is obliquely extended relative to the circumferential direction and the axial direction of the tube section, so that active bending and/or passive bending can be realized, meanwhile, the axial stability of the bending tube is effectively ensured, the bending tube is not easy to be elongated or compressed, and can be more smooth in bending and the bending form is ensured to be more approximate to a circle.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first embodiment of a bending tube for an endoscope according to the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at Q;

FIG. 3 is an enlarged view of a portion of the portion W of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1 at F;

FIG. 5 is a left side view of a first embodiment of a curved endoscope tube provided by the present utility model;

FIG. 6 is a bottom view of a first embodiment of a curved endoscope tube provided by the present utility model;

FIG. 7 is an enlarged view of the portion R of FIG. 6;

FIG. 8 is a right side view of a first embodiment of a curved endoscope tube provided by the present utility model;

FIG. 9 is an enlarged view at U of FIG. 8;

FIG. 10 is an enlarged view of FIG. 8 at I;

FIG. 11 is an enlarged view of FIG. 8 at O;

FIG. 12 is a top view of a first embodiment of a curved endoscope tube provided by the present utility model;

FIG. 13 is a schematic cross-sectional view of a first helical kerf projection wire of a first embodiment of a curved tube of an endoscope in accordance with the present utility model;

FIG. 14 is a schematic view of a second embodiment of a curved endoscope tube according to the present utility model;

fig. 15 is an enlarged view at L of fig. 14;

FIG. 16 is a left side view of a second embodiment of a curved endoscope tube provided by the present utility model;

FIG. 17 is a bottom view of a second embodiment of a curved endoscope tube provided by the present utility model;

FIG. 18 is a right side view of a second embodiment of a curved endoscope tube provided by the present utility model;

FIG. 19 is a top view of a second embodiment of a curved endoscope tube provided by the present utility model;

FIG. 20 is a schematic cross-sectional view of projection lines of first and second helical slits of a second embodiment of a curved endoscope tube according to the present utility model.

Reference numerals:

a first helical slit 11, a second helical slit 12, a first enlarged end hole 131, a second enlarged end hole 132;

a third helical slit 21, a fourth helical slit 22;

a first step-type slit 301, a second step-type slit 302, a main slit 31, a connecting slit 32, and a third enlarged end hole 33;

a traction rope positioning hole 4 and a connecting sheet 41;

a first pipe section 5;

a second pipe section 6;

a first axis X and a second axis Y.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The core of the utility model is to provide an endoscope bending tube and an endoscope comprising the endoscope bending tube, which have lower manufacturing cost and more reliable use.

Referring to fig. 1 to 13, the endoscope bending tube is a circular tube, and in other embodiments, the endoscope bending tube may be an elliptical tube, a square tube or other special tubes. The extending direction of the endoscope bending tube is the axial direction or the axial direction, and corresponds to the left-right direction in fig. 5.

In the embodiment of the utility model, the endoscope bending tube is provided with the kerf, and the kerf is of a hole-seam structure penetrating through the endoscope bending tube, and can be integrally formed on the endoscope bending tube through a cutting process.

As shown in fig. 1, the endoscope-bending tube includes a first tube section 5, and the first tube section 5 includes a plurality of first helical slits 11, which are not communicated with each other, provided along a first helical stroke line of an outer periphery thereof, and a plurality of second helical slits 12, which are not communicated with each other, provided along a second helical stroke line of an outer periphery thereof. The first spiral travel line and the second spiral travel line are two virtual line segments extending in the spiral direction on the first pipe segment 5. The spiral cutting seam is arranged along the spiral travel line, namely, the spiral cutting seam is spirally distributed along the extending direction of the corresponding spiral travel line, and the spiral cutting seam can be wholly or partially structurally positioned on the spiral travel line. For example, in order to facilitate processing and ensure that the curved configuration is more circular, in this embodiment, the first helical slit 11 is a linear slit located on the first helical travel line; the second spiral slit 12 is a linear slit located on the second spiral travel line, that is, a section selected at will on the first spiral slit 11 or the second spiral slit 12, in an inclined state with respect to the circumferential direction and the axial direction, and the spiral slit extends on the spiral travel line, that is, the spiral slit is located entirely on the spiral travel line. Of course, in other embodiments, the first spiral slit 11 and the second spiral slit 12 may be wave-shaped slits, saw-tooth-shaped slits, or slits with the corresponding spiral travel line as the central axis.

Wherein the first helical slits 11 and the second helical slits 12 are alternately arranged in the axial direction of the first pipe section 5, and projection lines on the cross section (cross section perpendicular to the axial direction) of the first pipe section 5 are oppositely arranged. Wherein in the present embodiment, in order to keep the bending angles of the first tube section 5 uniform in the opposite two directions, the projection lines of the first spiral slit 11 and the second spiral slit 12 on the cross section of the first tube section 5 are symmetrical with respect to a first axis X passing through the center of the cross section of the first tube section 5. Illustratively, as shown in fig. 13, in the cross section of the first pipe section 5, the projection lines of the first spiral slit 11 are distributed in a preset first area N1, the projection lines of the second spiral slit 12 are distributed in a preset second area N2, and the two projection lines are disposed opposite to each other and are symmetrical about a first axis X.

In this embodiment, the kerf structure is directly processed on the endoscope bending tube to realize bending of the bending tube structure, compared with the prior art that the rotation pin is required to be purchased in addition to axially connect each bending tube unit, the kerf is integrally arranged on the endoscope bending tube, the manufacturing cost is very low, the processing is convenient, the integral structure can not have separation problem, and the reliability of use can be improved.

Further, the projection lines of the first helical slit 11 and the second helical slit 12 on the cross section of the first pipe section 5 have overlapping portions. The overlapping portion is generally easily deformed, so that the force for deforming the first pipe section 5 can be reduced by providing the overlapping portion, that is, the first pipe section 5 can be more easily bent.

Specifically, in the present embodiment, the length of the projection line of the first spiral slit 11 and the second spiral slit 12 on the cross section of the first pipe section 5 is longer than 1/2 of the circumference of the first pipe section 5, so that the projection line of the first spiral slit 11 and the second spiral slit 12 on the cross section of the first pipe section 5 has an overlapping portion, thereby improving the bending capability of the first pipe section 5. Referring to fig. 13, the circumference of the first pipe section 5 is equally divided by the first axis X, projection lines of the first spiral slit 11 are distributed in a preset first area N1, two ends of the preset first area N1 are respectively N11 ends and N12 ends, projection lines of the second spiral slit 12 are distributed in a preset second area N2, two ends of the preset second area N2 are respectively N21 ends and N22 ends, and at this time, lengths of the first spiral slit 11 and the second spiral slit 12 are smaller than the circumference of the first pipe section 5 and larger than 1/2 circumference of the first pipe section 5. Of course, in other embodiments, the length of the projection of the first helical slit 11 and/or the second helical slit 12 on the cross section of the first tube segment 5 may also be less than 1/2 of the circumference of the first tube segment 5.

Further, the end of the first helical slit 1 is provided with a first enlarged end hole 131 and/or the end of the second helical slit 12 is provided with a second enlarged end hole 132. Referring to fig. 2 and 10, the end width of the first spiral slit 11 in the extending direction thereof is enlarged to constitute a first enlarged end hole 131, and the end width of the second spiral slit 12 in the extending direction thereof is enlarged to constitute a second enlarged end hole 132. When the bending tube is bent, the bending deformation strain of the circumferential end part of the slit is large, and the stress is also large, so that the stress concentration of the end part of the slit can be reduced by arranging an enlarged end hole at the end part of the spiral slit.

Further, the first pipe section 5 further includes a plurality of haulage rope positioning holes 4 formed on the punched pipe wall, where the plurality of haulage rope positioning holes 4 are respectively disposed opposite the plurality of first spiral slits 11 and the plurality of second spiral slits 12, for example, a portion of the haulage rope positioning holes 4 are respectively disposed opposite the plurality of first spiral slits 11, and the remaining portion of the haulage rope positioning holes 4 are respectively disposed opposite the plurality of second spiral slits 12, and each haulage rope positioning hole 4 is respectively disposed opposite the plurality of second spiral slits 12. Accordingly, the portion of the tube wall that is punched into the curved tube of the endoscope forms a web 41, which web 41 can be used as a pull-cord guiding position for limiting the movement of the pull-cord in the axial direction. When in use, one end of the traction rope is fixedly connected to the head end of the bent pipe, and the other end of the traction rope passes through the through holes formed between the connecting pieces 41 and the pipe wall of the first pipe section 5 and then is connected with the bending control part of the operation part, so that the clearance of the spiral kerf (for example, the first spiral kerf 11) positioned at the pulling force side is reduced, the clearance of the spiral kerf (for example, the second spiral kerf 12) positioned at the other side is increased, and the whole first pipe section 5 is bent and deformed towards the pulling force side, so that the bending and deformation of the first pipe section are actively controlled. In addition, the bending pipe has certain bending rigidity, so that the bending pipe is elastically deformed and bent under the stretching of the traction rope, and the bending pipe has an automatic recovery function after the upper pulling force of the traction rope is unloaded. Of course, it will be appreciated that in some embodiments the first tube section 5 may also act as a passive bending tube, being passively bent when subjected to an external force.

Further, the first spiral travel line and the second spiral travel line have the same spiral direction and pitch distribution characteristics, that is, the first spiral travel line and the second spiral travel line are staggered in the axial direction and can be overlapped after being translated.

The first spiral travel line and the second spiral travel line have the same spiral direction, and more first spiral slits 11 and second spiral slits 12 can be arranged along the axial direction of the first pipe section 5 under the condition that the connection strength of the first pipe section 5 is ensured. Specifically, if the outer peripheral surface of the first pipe section 5 is unfolded to be a single plane, when the spiral directions of the first spiral travel line and the second spiral travel line are the same, the first spiral slits 11 and the second spiral slits 12 are alternately arranged and parallel to each other; when the spiral directions of the first spiral travel line and the second spiral travel line are opposite, the extension lines of the first spiral kerf 11 and the second spiral kerf 12 intersect, so that a proper axial distance is ensured between the adjacent first spiral kerf 11 and the adjacent second spiral kerf 12 to ensure the connection strength of the first pipe section 5, and a single spiral kerf pair (i.e., the adjacent first spiral kerf 11 and the adjacent second spiral kerf 12) needs to occupy more axial arrangement space.

In addition, the first spiral travel line and the second spiral travel line also have the same pitch distribution characteristics, for example, the pitches of the first spiral travel line and the second spiral travel line in each section are the same, so that the uniformity of bending performance of the first pipe section 5 in two opposite directions can be improved.

Further, the first pipe section 5 has a head end and a tail end, and the pitch of the first spiral travel line and the second spiral travel line in a first preset section near the head end is smaller than the pitch of the first spiral travel line and the second spiral travel line in a second preset section near the tail end. Referring to fig. 1, in the present embodiment, on the first pipe section 5, each first spiral slit 11 and each second spiral slit 12 in the first preset section form a slit assembly a, and each first spiral slit 11 and each second spiral slit 12 in the second preset section form a slit assembly B.

When the cutting joint is arranged, the bending form of the bending pipe can be effectively controlled by adjusting the axial width of the cutting joint and the pitch of the adjacent cutting joint (specifically, the axial distance of two adjacent spiral cutting joints on the same spiral line is also the pitch of the spiral line), namely, when the pitch is fixed, the larger the axial width of the cutting joint is, the larger the maximum angle of bending is, and when the axial width of the cutting joint is fixed, the larger the pitch of the adjacent cutting joint is, the larger the bending rigidity is, and the larger the bending radius is.

In this embodiment, when applied to an endoscope, the lancing assembly a is disposed at the head end of the curved tube, as shown in fig. 2, 3, 9 and 10, because the first helical travel line and the second helical travel line have the same pitch distribution characteristics, in the lancing assembly a, the pitch of the adjacent first helical lancing 11 is s1, the pitch of the adjacent second helical lancing 12 is s1, and the pitches of the lancing assembly a are unified to s1; in the lancing assembly B, the pitch of the adjacent first spiral lancing 11 is s2, and the pitch of the adjacent second spiral lancing 12 is s2, so that the pitches of the lancing assembly B are unified to s2. The pitch s1 of the lancing assembly A is smaller than the pitch s2 of the lancing assembly B, so that the bending stiffness of the lancing assembly A is smaller than that of the lancing assembly B, and the lancing assembly A can be deformed firstly when being bent under the stress, thereby being convenient for bending control. Moreover, the lancing assembly A lancing can ensure good continuity performance of bending form, and can have smaller bending radius under the premise of ensuring strength under the same axial length.

Of course, in other embodiments, the pitch of the adjacent first spiral kerf 11 and the pitch of the adjacent second spiral kerf 12 in the same kerf assembly may be set to be different, and in this case, the pitch of the adjacent first spiral kerf 11 and the pitch of the adjacent second spiral kerf 12 in the kerf assembly a may be set to be smaller than the minimum of the pitch of the adjacent first spiral kerf 11 and the pitch of the adjacent second spiral kerf 12 in the kerf assembly B, so that the pitch of the kerf assembly a near the head end is smaller than the pitch of the kerf assembly B.

Further, as shown in fig. 1, the endoscope bending tube further includes: a second pipe section 6 connected to the first pipe section 5. As shown in fig. 4 and 7, the second pipe segment 6 includes a plurality of first stepped slits 301 formed around the fifth helical stroke line of the outer periphery thereof and a plurality of second stepped slits 302 formed around the sixth helical stroke line of the outer periphery thereof. The first and second stepped slits 301 and 302 are alternately arranged in the axial direction of the second pipe section 6, and projection lines of the first and second stepped slits 301 and 302 on the cross section of the second pipe section 6 are arranged oppositely, preferably symmetrically about the first axis X.

The step-shaped kerf is arranged around the corresponding spiral travel line, namely, the step-shaped kerf realizes the lifting of the spiral travel by forming a step in the axial direction, and the free end of the step-shaped kerf is positioned on the corresponding spiral travel line.

Specifically, the first and second stepped slits 301 and 302 may have the same structure, including: two main slits 31 extending along the circumferential direction of the second pipe section 6 and a connecting slit 32 connecting the two main slits 31, the free ends of the two main slits 31 are located on the corresponding helical travel lines, that is, the ends of the step-shaped slits are located on the corresponding helical travel lines, while the rest may not be located entirely on the corresponding helical travel lines, for example, for the circumferentially extending main slits 31, the rest is not located on the corresponding helical travel lines except for the ends.

Further, as shown in fig. 11, the free end of the main slit 31 may be provided with a third enlarged end hole 33, the effect of which may be referred to as an enlarged end hole 131 on the first spiral slit 11.

In the step-type slit, the connecting slit 32 connected between the two main slits 31 extends obliquely in the axial direction and the circumferential direction at the same time, or the connecting slit 32 extends in the axial direction, the bending tube torsional rigidity can be improved. Specifically, the connecting seam 32 is a linear seam, and in other embodiments, the connecting seam 32 may be replaced by other irregular structures, such as a hook structure.

In addition, the pitch and location of two adjacent stepped slits on the same helical wire may be provided in combination with the slits on the first pipe section 5. In this embodiment, all of the first step-shaped slits 301 and the second step-shaped slits 302 on the second tube section 6 constitute a slit assembly C, and as shown in fig. 1, the slit assembly a, the slit assembly B and the slit assembly C are sequentially arranged in the axial direction on the endoscope bending tube. When the bending tube is applied to an endoscope, the joint cutting assembly A is arranged at the head end of the bending tube, correspondingly, the joint cutting assembly C is arranged at one side close to the operation end, and the circumferential stop effect can be realized through the connecting joint 32 on the step joint cutting 3 so as to resist torsion force and lateral force in the other directions and improve the strength of the bending tube. In addition, as shown in fig. 9, 10 and 11, the pitch s1 of the lancing assembly a is smaller than the pitches s2 and s3 of the lancing assembly B and C (the pitch of the lancing assembly C may be defined with reference to the pitch of the lancing assembly a, and in the lancing assembly C, the axial distance between adjacent first stepped lancing 301 and the axial distance between adjacent second stepped lancing 302 are s 3), so that the bending stiffness of the lancing assembly a is smaller than that of the lancing assembly B and the lancing assembly C, and when the lancing assembly C is stressed and bent, the lancing assembly a is deformed first, thereby facilitating the bending control. Moreover, the lancing assembly A lancing can ensure good continuity performance of bending form, and can have smaller bending radius under the premise of ensuring strength under the same axial length.

Of course, in other embodiments, the slits in the first tube section 5 may be provided in other ways. In order to achieve multi-directional bending, as in the second embodiment shown in fig. 14-20, the first pipe section 5 may further include, in addition to the first spiral slit 11 and the second spiral slit 12: a plurality of third helical slits 21, which are not in communication with each other, open along a third helical travel line of the outer circumference of the first pipe section 5, and a plurality of fourth helical slits 22, which are not in communication with each other, open along a fourth helical travel line of the outer circumference of the first pipe section 5. The third spiral travel line and the fourth spiral travel line are also virtual line segments extending in the spiral direction on the first pipe segment 5.

In the axial direction of the first pipe section 5, first, second, third and fourth spiral slits 11, 12, 21, 22 are alternately arranged, as shown in fig. 15, for example. Alternatively, in other embodiments, the order of the alternating arrangement may be the first spiral slit 11, the third spiral slit 21, the second spiral slit 12, and the fourth spiral slit 22.

Wherein the third helical slit 21 is arranged opposite to the projection of the fourth helical slit 22 on the cross section of the first tube section 5 and is arranged offset to the projection of the first helical slit 11 and the second helical slit 12 on the cross section of the first tube section 5.

In particular, as shown in fig. 20, the projection lines of the first helical slit 11 and the second helical slit 12 on the cross section of the first tube section 5 are symmetrical about the first axis X; the projection of the third helical slit 21 and the fourth helical slit 22 on the cross section of the first tube section 5 is symmetrical about the second axis Y; both the first axis X and the second axis Y pass through the center of the cross section of the first pipe section 5, and are staggered by a preset angle in the circumferential direction of the first pipe section 5.

In this embodiment, the second axis Y and the first axis X are staggered by a preset angle of 90 ° in the circumferential direction of the first pipe section 5, so that the first pipe section 5 can be bent in four vertical directions. As shown in fig. 20, projection lines of the first spiral kerf 11 and the second spiral kerf 12 are respectively distributed in a preset first region N1 and a preset second region N2, and are symmetrical about a first axis X; the projection lines of the third spiral slit 21 and the fourth spiral slit 22 are respectively distributed in the preset third area N3 and the preset fourth area N4, and are symmetrical about the second axis Y.

Of course, in other embodiments, the preset angle of the second axis Y and the first axis X staggered in the circumferential direction of the first pipe segment 5 may be 60 ° or other angles, and other spiral slits, in which the projection lines in cross section are staggered with respect to the first spiral slit 11, the second spiral slit 12, the third spiral slit 21 and the fourth spiral slit 22, may be added to achieve six-directional or more-directional bending or any-directional bending of the curved pipe.

Further, as shown in fig. 15, the first, second, third and fourth spiral slits 11, 12, 21 and 22 have the same structure, so that the endoscope bending tube can be ensured to have the same connection strength and bending capability at different positions. Wherein, the structures of the slits are the same, which means that the translation and rotation of the slits in the space can be overlapped.

In addition to the above endoscope bending tube, the present utility model also provides an endoscope including the endoscope bending tube, and the endoscope bending tube may be specifically an endoscope bending tube provided in any of the above embodiments, and the beneficial effects may be referred to in the above embodiments accordingly. The structure of the other parts of the endoscope is referred to in the prior art, and will not be described herein.

It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" is two or more.

The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The endoscope bending tube and the endoscope provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (14)

1. An endoscope bending tube, characterized by comprising a first tube section (5), the first tube section (5) comprising a plurality of first helical slits (11) which are not communicated with each other and are formed along a first helical travel line of the outer periphery thereof, and a plurality of second helical slits (12) which are not communicated with each other and are formed along a second helical travel line of the outer periphery thereof;

wherein the first spiral slits (11) and the second spiral slits (12) are alternately arranged in the axial direction of the first pipe section (5), and projection lines on the cross section of the first pipe section (5) are oppositely arranged.

2. The endoscope bending tube according to claim 1, characterized in that the projection lines of the first helical slit (11) and the second helical slit (12) on the cross section of the first tube section (5) are symmetrical about a first axis (X) passing through the centre of the cross section of the first tube section (5).

3. The endoscope bending tube according to claim 2, characterized in that the length of projection lines of the first helical slit (11) and the second helical slit (12) on a cross section of the first tube section (5) is greater than 1/2 circumference of the first tube section (5).

4. The endoscope bending tube according to claim 1, characterized in that the projection lines of the first helical slit (11) and the second helical slit (12) on the cross section of the first tube section (5) have overlapping portions.

5. The endoscope bending tube according to claim 1, characterized in that the end of the first helical slit (11) is provided with a first enlarged end hole (131) and/or the end of the second helical slit (12) is provided with a second enlarged end hole (132).

6. The endoscope curved tube of claim 1 wherein said first helical travel line and said second helical travel line have the same helical direction and pitch profile.

7. An endoscope bending tube according to claim 6, characterized in that the first tube section (5) has a head end and a tail end, the pitch of the first and second helical travel lines being smaller in a first preset interval near the head end than in a second preset interval near the tail end.

8. The endoscope bending tube according to claim 1, characterized in that the first tube section (5) further comprises: a plurality of third helical slits (21) which are not communicated with each other and are formed along a third helical stroke line on the outer periphery thereof, and a plurality of fourth helical slits (22) which are not communicated with each other and are formed along a fourth helical stroke line on the outer periphery thereof; wherein:

the first spiral slits (11), the second spiral slits (12), the third spiral slits (21) and the fourth spiral slits (22) are alternately arranged in the axial direction of the first pipe section (5), or the first spiral slits (11), the third spiral slits (21), the second spiral slits (12) and the fourth spiral slits (22) are alternately arranged in the axial direction of the first pipe section (5);

the third spiral kerf (21) is arranged opposite to the projection line of the fourth spiral kerf (22) on the cross section of the first pipe section (5), and is arranged in a staggered manner with respect to the projection lines of the first spiral kerf (11) and the second spiral kerf (12) on the cross section of the first pipe section (5).

9. The endoscope bending tube according to claim 8, characterized in that the projection lines of the first helical slit (11) and the second helical slit (12) on the cross section of the first tube section (5) are symmetrical with respect to a first axis (X);

the projection lines of the third spiral slit (21) and the fourth spiral slit (22) on the cross section of the first pipe section (5) are symmetrical about a second axis (Y);

the first axis (X) and the second axis (Y) both pass through the center of the cross section of the first pipe section (5) and are staggered by a preset angle in the circumferential direction of the first pipe section (5).

10. The endoscope bending tube of claim 9, wherein the predetermined angle is 90 °.

11. The endoscope bending tube of claim 8, wherein the first helical slit (11), the second helical slit (12), the third helical slit (21) and the fourth helical slit (22) are identical in structure.

12. The endoscope bending tube of claim 1, wherein the first helical slit (11) is a linear slit on the first helical path; the second helical slit (12) is a linear slit located on the second helical travel line.

13. The endoscope curved tube of any of claims 1-12 further comprising: a second pipe section (6) connected to the first pipe section (5); the second pipe section (6) comprises a plurality of first step-shaped slits (301) which are not communicated with each other and are formed around a fifth spiral travel line on the periphery of the second pipe section, and a plurality of second step-shaped slits (302) which are not communicated with each other and are formed around a sixth spiral travel line on the periphery of the second pipe section;

the first step-shaped slits (301) and the second step-shaped slits (302) are alternately arranged in the axial direction of the second pipe section (6), and projection lines on the cross section of the second pipe section (6) are oppositely arranged;

the first step-shaped slit (301) and the second step-shaped slit (302) have the same structure, and comprise: -two main slits (31) extending along the circumference of the second pipe section (6) and-a connecting slit (32) connecting the two main slits (31), the free ends of the two main slits (31) being located on the corresponding helical travel line.

14. An endoscope comprising the endoscope bending tube of any one of claims 1 to 13.