WO2023025119A1 - Tube coudé auto-adaptatif, tube coudé pour endoscope, partie d'insertion et endoscope - Google Patents

Tube coudé auto-adaptatif, tube coudé pour endoscope, partie d'insertion et endoscope Download PDF

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Publication number
WO2023025119A1
WO2023025119A1 PCT/CN2022/114094 CN2022114094W WO2023025119A1 WO 2023025119 A1 WO2023025119 A1 WO 2023025119A1 CN 2022114094 W CN2022114094 W CN 2022114094W WO 2023025119 A1 WO2023025119 A1 WO 2023025119A1
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WO
WIPO (PCT)
Prior art keywords
bending
adaptive
tube
self
groove
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PCT/CN2022/114094
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English (en)
Chinese (zh)
Inventor
胡舜
荆峰
林守钢
龚鹏程
陈国富
朱彦聪
Original Assignee
深圳开立生物医疗科技股份有限公司
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Publication of WO2023025119A1 publication Critical patent/WO2023025119A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A61B1/0051—Flexible endoscopes with controlled bending of insertion part
    • A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A61B1/008—Articulations

Definitions

  • the present application relates to the technical field of medical devices, and more specifically, relates to an adaptive bending tube.
  • the present application also relates to a curved tube for an endoscope including the self-adaptive curved tube, an insertion portion, and an endoscope.
  • insertion tubes that can enter the cavity of the human body, such as the insertion part of an endoscope, are widely used to facilitate observation of target positions in the human body and assist minimally invasive or non-invasive treatment.
  • the insertion tube Due to the complexity of the channel bending in the human body cavity, especially for some continuous bending or severe bending of the human body cavity, in order to ensure the smooth entry of the insertion tube, it is usually required that the insertion tube has an adaptive bending part, and the adaptive bending The part can be adaptively and freely bent due to the restriction of the shape of the cavity of the human body, so that the insertion tube can smoothly enter the cavity of the human body.
  • an endoscope In the case of an endoscope, it includes an insertion portion, which generally includes a front end portion, a curved portion, and a flexible portion.
  • the rigidity of the section of the flexible part close to the bending part is usually reduced, so that the rigidity of the section of the flexible part close to the bending part is lower than that of the flexible part
  • the rigidity of the other parts forms an adaptive bending section, so that a section of the flexible part close to the bending part can be adaptively bent due to the restriction of the cavity channel, so as to ensure the smoothness of the insertion part entering the human cavity.
  • the adaptive bending section is formed by reducing the rigidity of a section of the flexible part close to the bending section, so that the maximum bending angle of the adaptive bending section is not easy to control. Moreover, the bending fatigue life of this adaptive bending section is low, and when bending prone to failure.
  • the purpose of the present application is to provide an adaptive bending pipe, the maximum bending angle of which is controllable, and the bending is not prone to failure.
  • Another object of the present application is to provide a curved tube for endoscope including the above-mentioned self-adaptive curved tube, which has both an active bending part and a passive bending part, and the maximum bending angle of the passive bending part is controllable, and It is not easy to fail when bent.
  • Another object of the present application is to provide an insertion part comprising the above-mentioned curved tube for an endoscope, which has better adaptability to human cavity.
  • Another object of the present application is to provide an endoscope comprising the above-mentioned insertion portion, which has better insertion performance.
  • An adaptive bending tube comprising several coaxially arranged bending rings, two adjacent bending rings are connected by a clamping structure, and there is a preset gap between two adjacent bending rings in the clamping state ;
  • the clamping structure includes:
  • a protrusion provided on one of the two adjacent bending rings, the free end of the protrusion is provided with a first hook
  • the groove provided on the other of the two adjacent bending rings, the notch of the groove is provided with a second hook, and the second hook is used to cooperate with the first hook to prevent the protrusion from disengaging from the groove;
  • the protrusion is movably embedded in the groove along the axial direction of the bending ring, and the protrusion can rotate relative to the groove.
  • any two adjacent curved rings are respectively connected by at least two snapping structures, and all the snapping structures between two adjacent curved rings are distributed in a spiral shape.
  • the end surface of the curved ring is provided with at least two stepped surfaces staggered along its axial direction, and the two adjacent engaging structures along the circumferential direction of the curved ring are respectively located on different steps. face.
  • the end surface of the curved ring is provided with at least two stepped surfaces staggered along its axial direction, and the engaging structure is arranged between two adjacent stepped surfaces along the circumferential direction.
  • a sunken groove is provided at the junction of two circumferentially adjacent stepped surfaces, and the protrusion extends from the bottom of the sunken groove along the axial direction of the curved ring.
  • the stepped surface is perpendicular to the axis of the curved ring.
  • the two axially adjacent snapping structures of the curved ring are staggered along the circumferential direction of the curved ring.
  • the protruding portion and the first hook form a T-shaped structure, and the second hooks are respectively provided on opposite sides of the notch.
  • the protrusion and the first hook form an L-shaped structure, and one side of the notch is provided with the second hook.
  • the engaging directions of any two adjacent first hooks along the helical travel direction of the engaging structure are opposite.
  • directions of any two adjacent protrusions along the helical travel direction of the locking structure are opposite.
  • the side of the protrusion facing the groove wall of the groove has a first arc-shaped surface; the side wall of the groove and the bottom wall of the groove pass through the second arc-shaped surface connected.
  • the protruding part and the groove cooperate to limit in the circumferential direction of the bending ring, so as to prevent two adjacent bending rings from twisting relative to each other.
  • the adaptive bend tube is cut from a one-piece tubular member.
  • a curved tube for an endoscope comprising:
  • the active bending tube the first end of which is used to connect with the traction rope passing through it, so that the active bending tube can be driven to bend by pulling the traction rope;
  • the first end of the self-adaptive bending tube is connected to the second end of the active bending tube, and the second end of the self-adaptive bending tube is used to connect with the flexible endoscope tube connected.
  • the self-adaptive bending tube is connected to the active bending tube through an adapter ring.
  • an elastic tube is pierced in the self-adaptive bending tube, which is used for the passage of the traction rope, one end of the elastic tube is connected with the adapter ring, and the other end of the elastic tube is connected with the It is connected with the end of the flexible tube away from the self-adaptive bending tube or the operating part of the endoscope.
  • An insertion part includes a front end part, a flexible tube and any one of the above-mentioned curved tubes for endoscope.
  • An endoscope includes the insertion portion as described above.
  • the self-adaptive bending pipe provided by the application is formed by several coaxially arranged bending rings, and two adjacent bending rings are connected by a snap-in structure, and the snap-in structure includes a protrusion and a groove, because the protrusion is in the groove
  • the inner part can move along the axial direction of the bending ring and the protrusion can rotate relative to the groove.
  • the bending ring of the self-adaptive bending tube is subjected to a force with a certain angle or perpendicular to its axis, if the initial state is adjacent If the preset gap between the two bending rings is not zero, the clamping structure between the bending rings on the force receiving side will be axially compressed, so that the free end and the groove of the protrusion on the force receiving side will The bottoms of the grooves are close to each other; at the same time, the snap-fit structure between the bending rings on the non-stressed side that is completely opposite to the stressed side is subjected to axial tension, that is, the protrusion of the non-stressed side The free end and the groove bottom of the groove are far away from each other; in addition, there will be a composite motion of axial movement and relative rotation along the bending ring between the protrusion and the groove in other directions, thus making the entire self-adaptive bending tube bending.
  • the bending ring of the self-adaptive bending tube When the bending ring of the self-adaptive bending tube is subjected to a force with a certain angle or perpendicular to its axis, if the preset gap between two adjacent bending rings is zero in the initial state, that is, two adjacent bending rings
  • the clamping structure between the bending rings on the force-bearing side remains close to each other, as a rotation fulcrum, so that the bending rings on the non-force-bearing side that are completely opposite to the force-bearing side
  • the clamping structure is subjected to axial tension, so that the free end of the protrusion on the non-stress side and the groove bottom of the groove are away from each other; between the protrusion and the groove in other directions, there will be an axis along the bending ring.
  • the maximum bending angle of the self-adaptive bending tube and the stroke of the axial movement of the protrusion relative to the groove, the angular range of the rotation of the protrusion relative to the groove, and the size of the preset gap between two adjacent bending rings Therefore, by rationally designing the size of the preset gap between two adjacent bending rings, the stroke of the axial movement of the protrusion relative to the groove, and the angular range of the rotation of the protrusion relative to the groove, the self-adaptive The maximum bending angle of the bending tube makes the maximum bending angle of the adaptive bending tube controllable; in addition, using the preset gap between two adjacent bending rings, the axial movement of the protrusion relative to the groove and the relative The rotation of the groove realizes the bending of the self-adaptive bending tube.
  • the rigidity of the section of the flexible part close to the bending part is reduced to form the self-adaptive bending part, which avoids the elastic deformation of the self-adaptive bending tube itself. Bending occurs, thus improving the bending fatigue life of adaptive bending tubes and preventing bending failures.
  • the bending tube for endoscope provided by this application includes the active bending tube and the above-mentioned self-adaptive bending tube. invalidated.
  • the insertion part provided by the present application includes the above-mentioned curved tube for endoscope, which has better adaptability to the cavity of the human body.
  • the endoscope provided by the present application including the above-mentioned insertion portion, has better insertion performance.
  • Fig. 1 is a schematic structural diagram of an adaptive bending pipe provided by a specific embodiment of the present application
  • Fig. 2 is an enlarged view of the clamping structure in Fig. 1;
  • Fig. 3 is a schematic structural diagram of an adaptive bending pipe provided by another specific embodiment of the present application.
  • Fig. 4 is a structural schematic diagram of an adaptive bending pipe provided by another specific embodiment of the present application.
  • FIG. 5 is a schematic structural view of a curved tube for an endoscope provided in a specific embodiment of the present application
  • Fig. 6 is the sectional view of Fig. 5;
  • FIG. 7 is a schematic structural view of a curved tube for an endoscope provided in another specific embodiment of the present application.
  • Fig. 8 is a sectional view of Fig. 7;
  • Figure 9 is a front view of the bending unit
  • Fig. 10 is a schematic structural diagram of an endoscope provided by a specific embodiment of the present application.
  • Fig. 11 is a schematic diagram of the structure of the insertion part in Fig. 10 inserted into the cavity of the human body;
  • Fig. 12 is a left side view of Fig. 11 .
  • 11 is the bending ring
  • 111 is the preset gap
  • 112 is the step surface
  • 1121 is the sinking groove
  • 113 is the connection surface
  • 114 is the fifth mating end face
  • 115 is the sixth mating end face
  • 12 is the clamping structure
  • 121 is the protrusion 1211 is the first hook
  • 1212 is the first arc surface
  • 1213 is the first mating surface
  • 1214 is the third mating surface
  • 122 is the groove
  • 1221 is the second hook
  • 1222 is the second arc surface
  • 1223 is the second mating surface
  • 1224 is the fourth mating surface
  • 1 is the self-adaptive bending tube
  • 2 is the active bending tube
  • 21 is the traction rope
  • 22 is the bending unit
  • 23 is the rivet
  • 24 is the shaft axis
  • 25 is the guide ring
  • 3 is the flexible tube
  • 4 is the front end
  • 5 is the Adapter ring
  • 6 is an elastic tube
  • 100 is an insertion part
  • 200 is an operation part
  • 300 is a connector
  • 400 is a connecting pipe.
  • the core of the present application is to provide an adaptive bending pipe, the maximum bending angle of which is controllable, and the bending is not prone to failure.
  • Another core of the present application is to provide a curved tube for endoscope including the self-adaptive curved tube, which has both an active bending part and a passive bending part, and the maximum bending angle of the passive bending part is controllable, and It is not easy to fail when bent.
  • Another core of the present application is to provide an insertion part comprising the above-mentioned curved tube for endoscope, which has better lumen adaptability.
  • Another core of the present application is to provide an endoscope comprising the above-mentioned insertion portion, which has better insertion performance.
  • FIG. 1-FIG. 12 are the attached drawings of the specification of this application.
  • the present application provides an adaptive bending pipe, which includes several coaxially arranged bending rings 11, two adjacent bending rings 11 are connected by a snap-fit structure 12, and are adjacent in the snap-fit state There is a predetermined gap 111 between the two bending rings 11; wherein, the engaging structure 12 includes a protrusion 121 and a groove 122 fitted with concave and convex, and the protrusion 121 is arranged on one of the two adjacent bending rings 11
  • the groove 122 is arranged on the other of the two adjacent bending rings 11, the free end of the protrusion 121 is provided with a first hook 1211, and the notch of the groove 122 is provided with a second hook 1221,
  • the first hook 1211 cooperates with the second hook 1221 to prevent the protrusion 121 from detaching from the groove 122 , so as to ensure the reliability of the connection between two adjacent bending rings 11 .
  • the protruding portion 121 is embedded in the groove 122 so as to move along the axial direction of the bending ring 11 , and the protruding portion 121 can rotate relative to the groove 122 . That is to say, after the protrusion 121 is embedded in the groove 122, the dimension of the first hook 1211 along the axial direction of the bending ring 11 is smaller than the distance between the second hook 1221 and the groove 122 along the axial direction of the bending ring 11.
  • the protrusion 121 and the groove 122 can rotate relative to each other, so as to ensure the relative rotation between two adjacent bending rings 11, so as to realize the bending of the self-adaptive bending pipe.
  • the specific size of the preset gap 111 between two adjacent bending rings 11 is not limited, and those skilled in the art can set it according to actual needs.
  • the preset gap 111 can be At this time, after the two adjacent curved rings 11 are connected by the snap-fit structure 12, the parts other than the snap-fit structure 12 on the adjacent two curved rings 11 are close to each other and face to face; of course , the preset gap 111 can also be any value greater than zero, as long as the self-adaptive bending tube formed by it has bending performance and its structural strength can be ensured.
  • the present application does not limit the stroke size of the axial movement of the protrusion 121 relative to the groove 122, and the stroke of the axial movement of the protrusion 121 relative to the groove 122 may be equal to the predetermined distance between two adjacent bending rings 11. It is assumed that the gaps 111 are the same or different. When the stroke of the axial movement of the protrusion 121 relative to the groove 122 is the same as the preset gap 111 between two adjacent curved rings 11 , when the free end of the protrusion 121 contacts the bottom of the groove 122 , Then the preset gap 111 between two adjacent bending rings 11 is zero; The predetermined gap 111 between the bending rings 11 is the largest.
  • the maximum bending can be achieved as long as one matching surface of the corresponding feature is abutted during the movement. angle.
  • the maximum bending angle of the adaptive bending tube is related to the stroke of the axial movement of the protrusion 121 relative to the groove 122, the angle range of the rotation of the protrusion 121 relative to the groove 122, and the distance between two adjacent bending rings 11.
  • the size of the preset gap 111 is related, therefore, by rationally designing the size of the preset gap 111 between two adjacent curved rings 11, the stroke of the axial movement of the protrusion 121 relative to the groove 122 and the relative concave of the protrusion 121
  • the angle range of the rotation of the groove 122 can control the maximum bending angle of the self-adaptive bending tube, so that the maximum bending angle of the self-adaptive bending tube is controllable; in addition, using the preset gap 111 between two adjacent bending rings 11, the convex
  • the axial movement of the raised part 121 relative to the groove 122 and the rotation of the raised part 121 relative to the groove 122 realize the bending of the self-adaptive bending tube.
  • the self-adaptive bending part is formed to avoid bending due to the elastic deformation of the self-adaptive bending pipe itself, so the bending fatigue life of the self-adaptive bending pipe can be improved and bending failure can be prevented.
  • any two adjacent bending rings 11 are connected through at least two clamping structures respectively. 12 connections. That is to say, there are more than two engaging structures 12 distributed between two adjacent bending rings 11 along the circumferential direction of the bending rings 11, so that through the joint action of a plurality of engaging structures 12, two adjacent bending rings 11 to ensure the reliability of the connection between the bending rings 11.
  • all the clamping structures 12 between two adjacent bending rings 11 are distributed in a spiral shape.
  • all the engaging structures 12 between two adjacent bending rings 11 are evenly distributed along the circumference of the bending ring 11, That is, the angles between two adjacent engaging structures 12 between adjacent two bending rings 11 are the same, which is beneficial to ensure the uniformity of the bending rigidity of the self-adaptive bending tube in all directions.
  • the end surface of the bending ring 11 There are at least two stepped surfaces 112 staggered along the axial direction thereof, and two engaging structures 12 adjacent to each other along the circumferential direction of the bending ring 11 are located on different stepped surfaces 112 .
  • the different stepped surfaces 112 are staggered from each other along the axial direction of the curved ring 11, when the engaging structure 12 (such as the protrusion 121 or the groove 122) is provided on the different stepped surfaces 112, Then, the locking structures 12 on different stepped surfaces 112 can be staggered along the axial direction of the bending ring 11 .
  • the two adjacent engaging structures 12 along the circumferential direction of the bending ring 11 can be respectively provided on two adjacent step surfaces 112, or can be provided on two non-adjacent step surfaces 112, that is, There may be more than one stepped surface 112 not provided with a snapping structure 12 (such as a protrusion 121 or a groove 122 ) between two adjacent snapping structures 12 along the circumferential direction of the bending ring 11 .
  • a snapping structure 12 such as a protrusion 121 or a groove 122
  • this embodiment does not limit the connection between two adjacent step surfaces 112.
  • the connection surface 113 of the axis is connected. It can be understood that, in order to prevent the connection between two adjacent step surfaces 112 from affecting the bending of the self-adaptive bending tube, the corresponding connection surfaces 113 of two adjacent bending rings 11 are arranged oppositely, and the corresponding two connection surfaces 113 There is a certain gap between them.
  • the end surface of the bending ring 11 is provided with There are at least two stepped surfaces 112 staggered along its axial direction, and the engaging structure 12 is arranged between two adjacent stepped surfaces 112 along the circumferential direction, that is, two adjacent stepped surfaces 112 pass through the engaging structures 12 (such as Protrusion 121 or groove 122) transition.
  • a sunken groove 1121 is provided at the junction of two adjacent stepped surfaces 112 in the circumferential direction, and the protrusion 121 extends from the bottom of the sunken groove 1121 along the axial direction of the bending ring 11. .
  • the protrusion 121 protrudes from the sinker groove 1121, so that at least part of the dimension of the protrusion 121 along the axial direction of the bending ring 11 coincides with the partial dimension of the bending ring 11 itself along its axial direction, so that the bending ring
  • the overall maximum width of 11 is reduced, which is equivalent to compressing the axial distance of the snap-fit structure 12 between different bending rings 11 along the bending ring 11, thus reducing the rigidity of the adaptive bending tube and improving the self-adaptive bending. Flexibility to accommodate curved pipe bends.
  • the specific arrangement of the stepped surface 112 is not limited.
  • the stepped surface 112 can be an inclined surface with a certain inclination angle relative to the axis of the bending ring 11.
  • the stepped surface 112 is perpendicular to the axis of the bending ring 11 .
  • the stepped surface 112 may also form a certain inclined angle with respect to the axis of the bending ring 11 .
  • the two axially adjacent snapping structures 12 of the bending ring 11 are staggered along the circumferential direction of the bending ring 11 .
  • the two snap-in structures 12 that are adjacent to the bending ring 11 in the axial direction are not completely aligned, but are staggered from each other along the circumferential direction of the bending ring 11, which is beneficial to ensure that the bending ring 11
  • the axial dimension of the bending ring 11 can be reduced, thereby reducing the rigidity of the self-adaptive bending pipe and improving its bending flexibility.
  • the side wall of the groove 122 is connected to the bottom wall of the groove 122 through the second arc surface 1222 . That is to say, in this embodiment, through the cooperation between the first arc-shaped surface 1212 and the second arc-shaped surface 1222 , a rotating pair is formed, so that the protrusion 121 can rotate relative to the groove 122 .
  • the specific shapes of the first hook 1211 and the second hook 1221 are not limited, as long as the first hook 1211 and the second hook 1221 can cooperate with each other to prevent the protrusion 121 from Get out from the groove 122.
  • the protrusion 121 and the first hook 1211 form a T-shaped structure, and the two sides of the groove 122 opposite to the notch are respectively provided with second hooks 1221 .
  • the protrusion 121 and the first hook 1211 form an L-shaped structure, and the second hook 1221 is provided on one side of the notch of the groove 122 . It can be seen that the latter scheme has a simpler structure and is easier to process than the former scheme.
  • the hooking directions of any two adjacent first hooks 1211 along the helical travel direction of the locking structure 12 are opposite, and they are positive and negative hooks.
  • any two adjacent first hooks 1211 along the helical stroke direction of the locking structure 12 The hooking orientation of the can also be the same.
  • the number of hooking structures is equivalent to the number of hooking structures with an L-shaped structure Therefore, in the case of the same hook size, the hooking structure of the T-shaped structure can lay more than the L-shaped structure, and then, when the T-shaped structure is used in the self-adaptive bending tube, a higher Structural strength.
  • the self-adaptive bending tube is formed by cutting from an integral tubular member. That is to say, by cutting, the bending ring 11 with the predetermined gap 111 and the engaging structure 12 are formed integrally, the structure is simple, and the processing cost is low.
  • the protrusion 121 and the groove 122 cooperate to limit the circumferential direction of the bending ring 11 , so as to prevent two adjacent bending rings 11 from twisting relative to each other. That is to say, along the circumferential direction of the bending ring 11, the dimensions of the protrusion 121 and the groove 122 are the same or have a small gap, as long as the relative rotation of the protrusion 121 and the groove 122 can be ensured, so as to utilize the protrusion.
  • the cooperative positioning of the rising portion 121 and the groove 122 along the circumference of the bending ring 11 prevents relative rotation between the bending rings 11 around their axes, so that the adaptive bending tube has better torsional rigidity.
  • the orientations of the protrusions 121 may be the same or different; correspondingly, the orientations of the grooves 122 may be the same or different.
  • the directions of the protrusions 311 may be the same, that is, each bending ring 11 has a protrusion 121 at one end and a groove 122 at the other end.
  • any two adjacent The directions of the protrusions 121 are opposite, that is, each bending ring 11 is alternately provided with protrusions 121 and grooves 122 in the circumferential direction at both ends thereof.
  • the present application also provides a curved tube for endoscope including the self-adaptive curved tube disclosed in the above embodiment, and the curved tube for endoscope also includes an active The bending tube 2, the first end of the active bending tube 2 is used to be connected with the traction rope 21 passing through it, so as to drive the active bending tube 2 to bend by pulling the traction rope 21; the second end of the active bending tube 2 is connected with the self-adaptive The first end of the curved tube is connected, and the second end of the self-adaptive curved tube is used to connect with the flexible tube 3 of the endoscope.
  • the flexible tube 3 is mainly used to realize the connection between the insertion part of the endoscope and the operation part located outside the body cavity of the human body.
  • the curved tube for endoscope has both an active bending part (ie, the active bending tube 2 ) and a passive bending part (ie, the self-adaptive bending tube).
  • the endoscope bending tube When the endoscope bending tube is applied to an endoscope, the end of the traction rope 21 away from the active bending tube 2 is connected to the angle control knob of the operating part 200 of the endoscope, so that the angle control knob can be operated to pull it The traction rope 21, and then the traction rope 21 drives the active bending tube 2 to bend, so that the active bending tube 2 passes through the human cavity smoothly.
  • the force generated by the adaptive bending tube function, so that the self-adaptive bending tube can be freely bent along the shape of the human body cavity.
  • the maximum bending angle of the self-adaptive bending tube can be controlled. Therefore, the self-adaptive bending tube can be reasonably designed according to the shape of the human body cavity. Adapt to the maximum bending angle of the bending tube, so that the maximum bending angle of the adaptive bending tube can meet the shape requirements of the human cavity; in addition, the bending fatigue life of the adaptive bending tube is long, which can prevent bending failure. Therefore, the endoscope The curved tube can be applied not only to disposable endoscopes, but also to reusable endoscopes.
  • the active bending part includes several coaxially arranged bending units 22, there is a certain interval between two adjacent bending units 22, and the adjacent bending units 22 are rotationally connected by rotating shafts (such as rivets 23), so that adjacent The two bending units 22 can rotate relative to each other around the shaft axis 24 .
  • two adjacent bending units 22 are connected by two rotating shafts (such as rivets 23) arranged symmetrically about the axis of the bending units 22, and one bending unit 22 is connected to the rotating shafts (
  • the rivets 23) are arranged at a certain angle staggered along the circumferential direction of the bending unit 22.
  • a bending unit 22 is arranged vertically to the rotating shafts (such as rivets 23) connected to the bending units 22 on both sides (as shown in FIG. 9 ), so that by operating the traction rope 21, the active The curved tube 2 rotates back and forth around two shaft axes 24 which are perpendicular to each other respectively.
  • the active bending tube 2 can be rotated in four directions, up, down, left, and right, and the active bending tube 2 can be bent in any direction of 360° through compound motion.
  • the number of traction ropes 21 is the same as the number of rotating shafts (such as rivets 23 ) at different angles in the circumferential direction of the bending unit 22 .
  • the four rotating shafts are symmetrically arranged in pairs with respect to the axis of the bending unit 22 respectively.
  • the rotating shafts (such as rivets 23) are vertically arranged, and the four rotating shafts (such as rivets 23) of different bending units 22 are aligned one by one respectively, and are respectively located on four straight lines, then the number of traction ropes 21 is four, and the four traction ropes 21 are all set in the active bending tube 2, as shown in Figure 6 and Figure 8, the position corresponding to each rotating shaft (such as rivets 23) on the bending unit 22 is respectively provided with a guide ring 25, and the traction rope 21 is drawn from the guide ring 25
  • the traction force of the traction rope 21 is transmitted to the bending unit 22 through the guide ring 25, and then the bending unit 22 is rotated around the corresponding rotating shaft (such as a rivet) 23) axis rotates, so that the active bending tube 2 bends in a certain direction (such as up or down or left or right, etc.).
  • the specific connection mode between the adaptive bending tube and the active bending tube 2 is not limited, as long as the connection between the two can be realized, considering the convenience of the connection between the two, as a
  • the self-adaptive bending pipe is connected to the active bending pipe 2 through an adapter ring 5 .
  • the adapter ring 5 includes a first socket portion for socketing with the active bending pipe 2 and a second socket portion for socketing with the self-adaptive bending pipe , between the active bending tube 2 and the first socket part and between the self-adaptive bending tube and the second socket part are respectively connected by fasteners or fixed by riveting or by other means such as welding.
  • the traction rope 21 penetrates from the flexible tube 3 of the endoscope, passes through the adaptive bending tube and the active bending tube 2 in sequence to the first end of the active bending tube 2, and connects with the first end of the active bending tube 2.
  • an elastic tube 6 is pierced in the self-adaptive bending tube and the flexible tube 3, and the elastic tube 6 is used for For the traction rope 21 to pass through, considering the convenience of fixing the elastic tube 6, in some embodiments, one end of the elastic tube 6 is connected to the adapter ring 5, and the other end of the elastic tube 6 is away from the flexible tube 3 for self-adaptive bending One end of the tube is connected to the operating part of the endoscope, so as to ensure the performance of the self-adaptive bending tube and the flexible tube 3 when the active bending tube 2 is bent.
  • each elastic tube 6 is threaded with a traction rope 21 .
  • the quantity of traction rope 21 is four
  • the quantity of elastic tube 6 is also four
  • the outer peripheral portion of each traction rope 21 is all sleeved with elastic tube 6, and at this moment, by four traction rope 21 control four bending directions to achieve multi-degree-of-freedom traction.
  • the present application also provides an insertion part including the curved tube for endoscope disclosed in the above embodiments, and an endoscope including the insertion part. Please refer to the prior art for the structures of other parts of the endoscope.
  • the endoscope includes an insertion part 100, an operation part 200, a connector 300 and a connecting pipe 400, wherein the insertion part 100 is used to enter the human body for inspection, and it includes a front end part 4, a curved tube for an endoscope With the flexible tube 3, the front end 4 is connected to the first end of the active bending tube 2 of the bending tube for the endoscope, and the flexible tube 3 is connected to the second end of the self-adaptive bending tube of the bending tube for the endoscope;
  • Part 4 is provided with structures such as a camera unit, an instrument channel, and a water-air channel, which are used for visually observing the target area of the human body and facilitating the use of instruments for auxiliary treatment.
  • the end of the flexible tube 3 away from the self-adaptive bending tube is connected to the operating part 200.
  • the operating part 200 is provided with an angle control knob for controlling the bending of the active bending tube 2 of the insertion part 100 and other various function buttons, so that the operator can adjust the bending angle according to the needs. Realize the corresponding functions.
  • the operation part 200 is connected with the connector 300 through the connection pipe 400, and the connector 300 is used to connect with external devices such as the processor of the endoscope and the light source, and the connector 300 realizes signals, Transmission and connection of lighting or other functions.
  • the insertion part and the endoscope include the above-mentioned curved tube for endoscope, and the curved tube for endoscope includes the self-adaptive curved tube disclosed in the above embodiment, the maximum bending angle of the self-adaptive curved tube is controllable, and its bending is not easy. Failure, therefore, makes the insertion part have better lumen adaptability, and further, the endoscope has better insertion performance.
  • FIGS. 11 and 12 are schematic views of inserting the insertion part 100 of the endoscope into the cavity of a human body.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

L'invention concerne un tube coudé auto-adaptatif (1), un tube coudé pour un endoscope, une partie d'insertion (100) et un endoscope. Le tube coudé auto-adaptatif comprend plusieurs anneaux courbés agencés de manière coaxiale (11), deux anneaux courbés adjacents (11) sont reliés au moyen d'une structure à encliquetage (12), et un espace prédéfini est formé entre deux anneaux courbés adjacents (11) dans un état d'encliquetage; et la structure à encliquetage (12) comprend une partie surélevée (121) disposée sur l'un des deux anneaux courbés adjacents (11), et une rainure (122) disposée dans l'autre des deux anneaux courbés adjacents (11), un premier crochet (1211) est disposé au niveau d'une extrémité libre de la partie surélevée (121), et un second crochet (1221) est disposé au niveau d'une ouverture de rainure de la rainure (122) et est utilisé pour être mis en correspondance avec le premier crochet (1211) de façon à empêcher la partie surélevée (121) d'être séparée de la rainure (122); et la partie surélevée (121) est incorporée de façon mobile dans la rainure (122) dans une direction axiale de l'anneau courbé (11), et la partie surélevée (121) peut tourner par rapport à la rainure (122). L'angle de courbure maximal du tube coudé auto-adaptatif (1) peut être commandé au moyen de la conception rationnelle de la taille de l'espace prédéfini entre deux anneaux courbés adjacents (11), la course de déplacement axial de la partie en relief (121) par rapport à la rainure (122), et la plage d'angle de rotation de la partie surélevée (121) par rapport à la rainure (122); et le tube coudé auto-adaptatif (1) a une grande résistance à la fatigue et n'est pas sujet à l'échec lors du pliage.
PCT/CN2022/114094 2021-08-23 2022-08-23 Tube coudé auto-adaptatif, tube coudé pour endoscope, partie d'insertion et endoscope WO2023025119A1 (fr)

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CN202110969088.8A CN115104996A (zh) 2021-08-23 2021-08-23 一种自适应弯曲管、内窥镜用弯曲管及内窥镜
CN202110969088.8 2021-08-23

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