CN117752288A - Self-locking structure of endoscope insertion tube and endoscope - Google Patents
Self-locking structure of endoscope insertion tube and endoscope Download PDFInfo
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- CN117752288A CN117752288A CN202410076357.1A CN202410076357A CN117752288A CN 117752288 A CN117752288 A CN 117752288A CN 202410076357 A CN202410076357 A CN 202410076357A CN 117752288 A CN117752288 A CN 117752288A
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- 230000037431 insertion Effects 0.000 title claims abstract description 84
- 238000003825 pressing Methods 0.000 claims abstract description 246
- 230000007246 mechanism Effects 0.000 claims abstract description 44
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- 238000005452 bending Methods 0.000 abstract description 39
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 10
- 238000013461 design Methods 0.000 description 9
- 230000000670 limiting effect Effects 0.000 description 7
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- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
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Abstract
The application provides a self-locking structure of endoscope insertion tube and endoscope, its self-locking structure includes casing, turns to traction assembly and locking mechanism. The housing serves as a carrier for the self-locking structure to provide support and protection for the internal components. The steering traction assembly is arranged in the shell, and a steering control rope of the insertion tube is connected to the steering traction assembly; the steering traction assembly is used for traction and control of the extension and contraction of the steering control rope so as to control the bending degree of the insertion tube. The locking mechanism is used for locking the steering traction assembly to ensure that the steering traction assembly is stable at a specific position. The locking mechanism comprises a flexible pressing piece and a pressing driving assembly; the self-locking structure of the endoscope insertion tube can prevent the steering traction assembly and the locking mechanism from bearing larger locking force for a long time, and the locking mechanism can selectively apply proper locking force according to the bending degree of the insertion tube; the bending stability of the endoscope insertion tube is ensured, and meanwhile, the fatigue damage of the locking mechanism is reduced, so that the service life of the endoscope insertion tube is prolonged.
Description
Technical Field
The application belongs to the technical field of endoscopes, and particularly relates to a self-locking structure of an endoscope insertion tube and an endoscope.
Background
An endoscope, which is a common medical instrument, is mainly used for examining internal tissues and organs of a human body. The device consists of a control handle, an insertion tube, a light source, a camera and other core parts. The control handle is connected to the proximal end of the insertion tube and is the primary tool operated by the physician. The light source and the camera are positioned at the distal end of the insertion tube and are responsible for collecting images when the insertion tube is inserted into the human body.
By controlling the handle, the doctor can precisely control the bending angle of the insertion tube to bend it at a predetermined angle. When the endoscope works, the distal end of the insertion tube is sent into the human body, and at this time, the light source provides illumination for the camera, so that the camera can capture clear images and information of internal organs. The doctor adjusts the bending angle of the insertion tube and the position of the camera through the control handle so as to obtain the optimal observation angle and the optimal visual field, thereby diagnosing the lesion more accurately.
To ensure the sharpness of the image acquired by the endoscope, the light source and camera head must rest stably on a particular imaging location. Therefore, the fixing of the bending angle and the imaging position of the insertion tube is important. Currently, most endoscopes achieve bending and steering of the insertion tube by controlling steering control cords within the insertion tube through a control handle. However, in some cases, especially after large bending angles or long-term use of the device, it may be difficult to maintain the insertion tube at a stable bending angle and imaging position, which undoubtedly causes a lot of inconveniences for the use of the endoscope.
Disclosure of Invention
An object of the embodiment of the application is to provide a self-locking structure of an endoscope insertion tube and an endoscope, so as to solve the technical problems that the bending angle of the endoscope insertion tube is difficult to lock and is easy to damage in the prior art.
In order to achieve the above purpose, the technical scheme adopted in the application is as follows:
provided is a self-locking structure of an endoscope insertion tube, comprising:
a housing;
the steering traction assembly is arranged in the shell, and a steering control rope of the insertion tube is connected to the steering traction assembly;
a locking mechanism for locking the steering traction assembly; the locking mechanism comprises a flexible pressing piece and a pressing driving assembly; when the locking mechanism locks the steering traction assembly, the flexible pressing piece is pressed against the steering traction assembly; one end of the pressing driving assembly is connected with the flexible pressing piece, and the other end of the pressing driving assembly is connected with the shell; the pressing driving assembly is in an unfolding state and a shrinking state, and when the locking mechanism locks the steering traction assembly, the pressing driving assembly is in the unfolding state; the pressing and driving assembly has a plurality of unfolding lengths so as to apply different pressures to the flexible pressing and driving piece; when the locking mechanism unlocks the steering traction assembly, the pressing driving assembly is in a contracted state, and the pressing driving assembly is contracted so as to reduce the pressure on the flexible pressing piece.
As a further improvement of the above technical scheme:
optionally, the pressing driving assembly includes a driving member, and a first pressing member and a second pressing member that are disposed opposite to each other, where one end of the first pressing member is connected to the housing, and one end of the second pressing member is movably connected to the flexible pressing member; the driving piece is connected with the first pressing piece, and when the pressing driving assembly is in a unfolding state, the driving piece is used for driving the first pressing piece and the second pressing piece to deviate from each other; when the pressing and supporting driving assembly is in a contracted state, the driving piece is used for driving the first pressing and supporting piece and the second pressing and supporting piece to be close to each other.
Optionally, the first pressing piece has a first wedge-shaped protrusion at an end facing the second pressing piece, and the second pressing piece has a second wedge-shaped protrusion at an end facing the first pressing piece; the driving piece is used for driving the first pressing piece to rotate around the axial direction of the second pressing piece, and the pressing driving assembly is in an unfolding state when the first pressing piece rotates until the first wedge-shaped bulge abuts against the second wedge-shaped bulge; when the first pressing piece rotates to the state that the first wedge-shaped bulge is separated from the second wedge-shaped bulge, the pressing driving assembly is in a contracted state.
Optionally, the first wedge-shaped protrusion comprises a plurality of first protruding parts connected in sequence, and the protruding height of each first protruding part is gradually increased one by one; and/or the second wedge-shaped bulge comprises a plurality of second bulge parts which are connected in sequence, and the bulge height of each second bulge part is gradually increased one by one; when the first pressing piece rotates to the position where different first protruding parts are pressed against the second protruding parts, the pressing driving assembly has different unfolding lengths.
Optionally, the second protruding portion includes inclined plane portion and the platform portion that connects gradually, inclined plane portion with the platform portion is the contained angle and arranges, inclined plane portion connects in between the adjacent the platform portion.
Optionally, the first pressing member is provided with a plurality of first wedge-shaped protrusions, and each of the first wedge-shaped protrusions is distributed in sequence along the circumferential direction of the first pressing member; and/or the second pressing piece is provided with a plurality of second wedge-shaped bulges, and the second wedge-shaped bulges are sequentially distributed along the circumferential direction of the second pressing piece.
Optionally, the locking mechanism further includes a pressing reset assembly, the pressing reset assembly includes a reset substrate and an elastic element, the reset substrate is connected to the housing, one end of the elastic element is connected to the reset substrate, and the other end of the elastic element is connected to the second pressing reset element.
Optionally, the flexible pressing piece is a flexible pressing ring, and when the flexible pressing ring is pressed against the steering traction assembly, the flexible pressing ring is in surface contact with the steering traction assembly.
Optionally, the steering traction assembly comprises a rocker arm, a traction seat, a supporting piece and a control rope connecting assembly, wherein the rocker arm is connected to the traction seat, the supporting piece is provided with a supporting spherical surface, the traction seat is movably connected to the supporting spherical surface of the supporting piece, and the control rope connecting assembly is connected to the traction seat.
The application also provides an endoscope, which comprises an endoscope insertion tube and the self-locking structure of the endoscope insertion tube.
The application provides a self-locking structure of endoscope insertion tube and beneficial effect of endoscope lies in:
the application provides a self-locking structure of endoscope insertion tube, this self-locking structure includes casing, turns to traction assembly and locking mechanism. The housing serves as a carrier for the self-locking structure to provide support and protection for the internal components. The steering traction assembly is arranged in the shell, and a steering control rope of the insertion tube is connected to the steering traction assembly; the steering traction assembly is used for traction and control of the extension and contraction of the steering control rope so as to control the bending degree of the insertion tube.
The locking mechanism is used for locking the steering traction assembly to ensure that the steering traction assembly is stable at a specific position. The locking mechanism comprises a flexible pressing piece and a pressing driving assembly; when the locking mechanism locks the steering traction assembly, the flexible pressing part can apply certain pressure to the steering traction assembly, so that friction force which is enough to resist the traction force on the steering control rope is generated between the flexible pressing part and the steering traction assembly, and the steering traction assembly is firmly locked at a specified position. One end of the pressing and driving assembly is connected with the flexible pressing and driving member so as to drive the flexible pressing and driving member to press and press against the steering traction assembly or separate from the steering traction assembly. The other end of the pressing drive assembly is connected to the housing to provide a reaction force against the steering traction assembly. The pressing driving assembly has two working states of an expanding state and a contracting state. When the locking mechanism locks the steering traction assembly, the pressing driving assembly is in an unfolding state; the unfolded pressing and supporting driving assembly can apply certain pressure to the flexible pressing and supporting piece, so that the flexible pressing and supporting piece is pressed on the steering traction assembly. Because the pressing and driving assembly has a plurality of unfolding lengths, different pressures can be applied to the flexible pressing and driving piece according to the requirement; when the bending angle of the insertion tube is smaller, the steering control rope is only subjected to smaller traction force, and the locking mechanism can lock the position of the steering traction assembly only by providing smaller locking force. Therefore, the steering traction assembly can be locked by only providing smaller pressure to the pressing and driving assembly, and fatigue damage is prevented from being aggravated due to the fact that the flexible pressing and driving assembly receives larger pressure for a long time. When the bending angle of the insertion tube is large, the steering control cord needs to withstand a large traction force. The flexible pressing piece can be stably locked to the steering traction assembly by adjusting the unfolding length of the pressing driving assembly and increasing the pressure applied to the flexible pressing piece. When the locking mechanism unlocks the steering traction assembly, the pressing driving assembly is in a contracted state, and the pressing driving assembly is contracted, so that the pressure on the flexible pressing piece is reduced, the locking state of the steering traction assembly is released, and the traction control of the steering traction assembly on the steering control rope is restored.
The self-locking structure of the endoscope insertion tube can prevent the steering traction assembly and the locking mechanism from bearing larger locking force for a long time, and the locking mechanism can selectively apply proper locking force according to the bending degree of the insertion tube; the bending stability of the endoscope insertion tube is ensured, and meanwhile, the fatigue damage of the locking mechanism is reduced, so that the service life of the endoscope insertion tube is prolonged.
The application also provides an endoscope, which comprises an endoscope insertion tube and the self-locking structure of the endoscope insertion tube. Since the endoscope has the self-locking structure of the endoscope insertion tube, the endoscope also has the advantage of the self-locking structure of the endoscope insertion tube.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a split structure of a self-locking structure of an endoscope insertion tube provided by the present application;
FIG. 2 is a schematic cross-sectional view of a self-locking structure of an endoscope insertion tube provided herein;
FIG. 3 is a schematic view of a partially enlarged structure of a self-locking structure of an endoscope insertion tube provided by the present application;
FIG. 4 is a schematic perspective view of a steering traction assembly of the self-locking structure provided by the present application;
fig. 5 is a schematic cross-sectional view of a steering traction assembly of the self-locking structure provided herein.
Wherein, each reference sign in the figure:
1. a housing; 2. a steering traction assembly; 21. a rocker arm; 22. a traction seat; 23. a support; 24. a control rope connection assembly; 241. a control rope connecting sleeve; 242. limit pins; 25. a dust cover; 3. an insertion tube; 4. a steering control rope; 5. a locking mechanism; 51. a flexible pressing member; 52. pressing against the driving assembly; 521. the first pressing piece; 5211. a first wedge-shaped protrusion; 522. a second pressing member; 5221. a second wedge-shaped protrusion; 5222. a bevel portion; 5223. a platform part; 5224. a limit column; 523. a driving member; 6. pressing against the reset assembly; 61. resetting the substrate; 611. a through hole; 62. an elastic member.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, 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. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
It should be noted that "distal" and "proximal" are used as terms of orientation, which are terms commonly used in the medical device arts, where "distal" refers to an end facing away from an operator during a surgical procedure and "proximal" refers to an end near the operator during a surgical procedure. Axial, refers to a direction parallel to the line connecting the distal center and the proximal center of the medical instrument; radial refers to a direction perpendicular to the axial direction.
The endoscope insertion tube 3 is generally composed of a flexible tube body, a cable for controlling the bending degree, an internal lead wire, and the like. The bending control line is controlled to stretch and retract in the pipe body through the control handle, so that the bending degree of the pipe body is regulated and controlled. In general, the number of bending control wires is four, which are evenly distributed around the axis of the tube. By cooperatively controlling the extension and retraction of the bending control wires, the endoscope insertion tube 3 can achieve arbitrary bending in a wide angle range of 0 ° -360 °.
In order to ensure that the endoscope insertion tube 3 can be stably maintained at an arbitrary bending angle, the control handle needs to be internally provided with a control wire locking structure. When the endoscope insertion tube 3 is bent to a specific angle or position, the telescopic length of each bending control wire is locked by the control wire locking structure, thereby ensuring that the body is stably maintained at a predetermined bending angle or position.
The inventor has found during intensive studies that the existing control wire locking structure applies a considerable locking force to ensure stable locking of the telescopic length of the bending control wire, regardless of the angle to which the endoscope insertion tube 3 is bent. While this design improves bending stability of the endoscope insertion tube 3 and reduces operational risks, excessive locking forces undoubtedly exacerbate fatigue damage of the locking structure, thereby shortening the operational life of the endoscope insertion tube 3. For an endoscope with high price, the reduction of the use cost of doctors and patients is also a problem to be solved urgently. However, in order to extend the working life of the locking structure, it is necessary to alleviate its fatigue damage and reduce the locking force. Once the locking force is reduced, bending stability of the endoscope insertion tube 3 may be affected again, increasing the operational risk.
In order to solve the technical contradiction, the inventor proposes a brand new self-locking structure of the endoscope insertion tube 3. The self-locking structure reduces fatigue damage of the locking structure while ensuring bending stability of the endoscope insertion tube 3, thereby prolonging the service life of the endoscope insertion tube 3. The design of the self-locking structure not only balances the contradiction between bending stability and structural fatigue damage, but also effectively solves the problem of reducing the use cost. See the following description for detailed description.
As shown in fig. 1 to 3, the present application provides a self-locking structure of an endoscope insertion tube 3, which includes a housing 1, a steering traction assembly 2, and a locking mechanism 5. The housing 1 serves as a carrier for the self-locking structure, providing support and protection for the internal components. The steering traction assembly 2 is arranged in the shell 1, and a steering control rope 4 of the insertion tube 3 is connected to the steering traction assembly 2; the steering traction assembly 2 is used to traction the extension and retraction of the steering control cord 4 to control the degree of bending of the insertion tube 3.
The locking mechanism 5 is used to lock the steering traction assembly 2, ensuring that it remains stable in a specific position. The locking mechanism 5 comprises a flexible pressing piece 51 and a pressing driving assembly 52; when the locking mechanism 5 locks the steering traction assembly 2, the flexible pressing piece 51 applies a certain pressure to the steering traction assembly 2, so that a friction force which is enough to resist the traction force on the steering control rope 4 is generated between the flexible pressing piece 51 and the steering traction assembly 2, and the steering traction assembly 2 is firmly locked at a specified position. One end of the pressing driving assembly 52 is connected to the flexible pressing member 51, so as to drive the flexible pressing member 51 to press against the steering traction assembly 2 or separate from the steering traction assembly 2. The other end of the pressing drive assembly 52 is connected to the housing 1 to provide a reaction force when pressing the steering traction assembly 2. The pressing against the drive assembly 52 has two operating states, an extended state and a retracted state. When the locking mechanism 5 locks the steering traction assembly 2, the driving assembly 52 is pressed to be in an unfolding state; the unfolded pressing and driving assembly 52 can apply a certain pressure to the flexible pressing and driving piece 51, so that the flexible pressing and driving piece 51 is pressed on the steering traction assembly 2. Since the pressing drive assembly 52 has a plurality of deployment lengths, different pressures may be applied to the flexible pressing member 51 as desired; when the bending angle of the insertion tube 3 is small, the steering control rope 4 is only subjected to small traction force, and the locking mechanism 5 only needs to provide small locking force to lock the position of the steering traction assembly 2. Therefore, the steering traction assembly 2 can be locked by only providing a small pressure to the driving assembly 52, so that fatigue damage is prevented from being aggravated due to the fact that the flexible pressing member 51 receives a large pressure for a long time. When the bending angle of the insertion tube 3 is large, the steering control cord 4 needs to withstand a large traction force. By adjusting the deployment length of the pressing drive assembly 52, the pressure applied to the flexible pressing member 51 is increased, enabling the flexible pressing member 51 to lock the steering traction assembly 2 stably. When the locking mechanism 5 unlocks the steering traction assembly 2, the pressing driving assembly 52 is in a contracted state, the pressing driving assembly 52 is contracted, so that the pressure on the flexible pressing piece 51 is reduced, the locking state of the steering traction assembly 2 is released, and the traction control of the steering traction assembly 2 on the steering control rope 4 is restored.
The self-locking structure of the endoscope insertion tube 3 can avoid that the steering traction assembly 2 and the locking mechanism 5 bear larger locking force for a long time, and the locking mechanism 5 can selectively apply proper locking force according to the bending degree of the insertion tube 3; while securing bending stability of the endoscope insertion tube 3, fatigue damage of the locking mechanism 5 is reduced, thereby improving the service life of the endoscope insertion tube 3.
As shown in fig. 1 to 3, in one embodiment of the present application, the pressing driving assembly 52 includes a driving member 523, and a first pressing member 521 and a second pressing member 522 disposed opposite to each other, where one end of the first pressing member 521 is movably connected to the housing 1. The housing 1 provides support for the first pressing member 521, and the housing 1 is used for limiting the first pressing member 521 from being separated from the second pressing member 522, and when the driving member 523 drives the first pressing member 521 to rotate, the first pressing member 521 can rotate against the friction force with the housing 1. One end of the second pressing member 522 is connected to the flexible pressing member 51 to transmit the pressing force on the second pressing member 522 to the flexible pressing member 51.
The driving member 523 is connected to the first pressing member 521, and when the pressing driving assembly 52 is in the deployed state, the driving member 523 is configured to drive the first pressing member 521 and the second pressing member 522 to deviate from each other, so that the deployed length of the pressing driving assembly 52 is increased, and thus the pressure on the flexible pressing member 51 is increased; when the pressing driving assembly 52 is in the contracted state, the driving member 523 is used for driving the first pressing member 521 and the second pressing member 522 to approach each other, so that the expanding length of the pressing driving assembly 52 is reduced, and the pressure on the flexible pressing member 51 is reduced. Through the pressing and propping driving assembly 52, enough pressure can be provided to stably lock the steering traction assembly 2 when the bending angle of the insertion tube 3 is large, and reduced pressure is provided to lock the steering traction assembly 2 when the bending angle of the insertion tube 3 is small, so that fatigue damage of the flexible pressing and propping piece 51 caused by overlarge pressure born for a long time is effectively avoided.
In one embodiment of the present application, the deployment length adjustment against the drive assembly 52 may be a stepless adjustment or a multi-stage adjustment to provide greater flexibility to the user. The adjusting modes can be selected according to actual application requirements so as to meet working conditions under different bending angles and pressure requirements.
In terms of the mechanism for realizing the deployment length adjustment, a wedge structure, a hydraulic/pneumatic cylinder, a screw nut mechanism or the like may be selected. These mechanisms ensure a high degree of stability and reliability of the hold-down drive assembly 52 during operation while providing smooth, accurate pressure changes during adjustment.
As shown in fig. 1 to 3, in one embodiment of the present application, the first pressing member 521 has a first wedge-shaped protrusion 5211 at an end facing the second pressing member 522, and the second pressing member 522 has a second wedge-shaped protrusion 5221 at an end facing the first pressing member 521; the driving member 523 is configured to drive the first pressing member 521 to rotate about the axial direction of the second pressing member 522, so as to drive the first wedge-shaped protrusion 5211 and the second wedge-shaped protrusion 5221 to abut or separate.
When the first pressing member 521 rotates until the first wedge-shaped protrusion 5211 abuts against the second wedge-shaped protrusion 5221, the gap between the first pressing member 521 and the second pressing member 522 is increased until the pressing driving assembly 52 is in the fully deployed state. At this time, the flexible pressing member 51 receives the maximum pressure, ensuring that the steering traction assembly 2 is stably locked in the specified position. When the first pressing member 521 rotates until the first wedge-shaped protrusion 5211 is separated from the second wedge-shaped protrusion 5221, the gap between the first pressing member 521 and the second pressing member 522 is reduced, and the pressing driving assembly 52 is in a contracted state. At this time, the pressure on the flexible pressing member 51 is reduced, thereby releasing the locked state of the steering traction assembly 2.
By rotating the driving member 523, the gap between the first pressing member 521 and the second pressing member 522 can be adjusted to adjust the deployment length of the pressing driving assembly 52, thereby achieving the adjustment of the pressure of the flexible pressing member 51.
As shown in fig. 1 to 3, in one embodiment of the present application, the first wedge-shaped protrusion 5211 includes a plurality of first protrusions connected in sequence, and the protrusion height of each first protrusion is increased one by one. Likewise, the second wedge-shaped protrusions 5221 include a plurality of second protrusions connected in sequence, the protrusion heights of the second protrusions being increased one by one; when the first pressing member 521 rotates until the first protrusion portion and the second protrusion portion are pressed against each other, the pressing driving assembly 52 has different unfolding lengths.
This design allows the first pressing member 521 to abut against a different second projection of the second wedge-shaped projection 5221 during rotation, resulting in a different deployment length. As the first pressing member 521 rotates, it may sequentially press against each second protrusion of the second wedge-shaped protrusion 5221, thereby continuously adjusting the deployment length of the pressing driving assembly 52. The design of such multiple stage adjustment provides greater flexibility to the user and allows for precise selection of the desired deployment length according to actual needs. In medical applications, by adjusting the rotational position of the first pressing member 521, for different bending angles and pressure requirements, a quick and accurate adjustment can be achieved, ensuring that the endoscope insertion tube 3 always maintains a stable bending state, while avoiding unnecessary structural fatigue and damage.
As shown in fig. 1 to 3, in one embodiment of the present application, the second protrusion includes a slope portion 5222 and a land portion 5223 connected in sequence, the slope portion 5222 being disposed at an angle to the land portion 5223, the slope portion 5222 being connected between adjacent land portions 5223. Likewise, the first boss also includes such a ramp and land.
The ramp portion 5222 is designed to achieve a smooth transition from the previous land to the next land. When the first pressing member 521 is rotated, the inclined surface portion 5222 can guide the driving member 523 to smoothly switch to the adjacent platform portion 5223, thereby ensuring continuous adjustment of the deployment length of the pressing driving assembly 52. The design avoids the possible clamping stagnation or vibration phenomenon in the rotation process, and improves the stability and reliability of the whole structure. The platform 5223 is designed to provide a stable docking point. The platform 5223 can ensure stable contact with the second abutments 522 during deployment or retraction of the abutment drive assembly 52. Further, a smooth transition can be ensured between the slope portion 5222 and the land portion 5223. The smaller included angle can make the transition smoother, and reduce the resistance in the rotation process, so that the first pressing piece 521 can rotate more easily.
As shown in fig. 1 to 3, in one embodiment of the present application, the first pressing member 521 has a plurality of first wedge-shaped protrusions 5211 thereon, each of the first wedge-shaped protrusions 5211 is equally distributed in the circumferential direction of the first pressing member 521 in sequence, the second pressing member 522 has a plurality of second wedge-shaped protrusions 5221 thereon, and each of the second wedge-shaped protrusions 5221 is distributed in the circumferential direction of the second pressing member 522 in sequence.
When the first pressing member 521 is in contact with the second pressing member 522, the first pressing member 521 and the second pressing member 522 do not rely on a single point or area to perform pressure transmission, and the pressure can be effectively dispersed by arranging the plurality of first wedge-shaped protrusions 5211 and the plurality of second wedge-shaped protrusions 5221, so that the stress on the second pressing member 522 is more balanced; the local stress to which the second pressing member 522 is subjected is reduced, preventing structural deformation or damage due to excessive concentrated pressure.
As shown in fig. 1 to 3, in one embodiment of the present application, the locking mechanism 5 further includes a pressing reset assembly 6, where the pressing reset assembly 6 includes a reset substrate 61 and an elastic member 62, and the reset substrate 61 is connected to the housing 1, and provides support for the elastic member 62.
One end of the elastic member 62 is connected to the reset substrate 61, and the other end of the elastic member 62 is connected to the second pressing member 522. When the flexible pressing member 51 is press-locked to the steering traction assembly 2, the pressing member 52 is correspondingly unfolded, and the elastic member 62 is compressed during this process, thereby storing energy. When the flexible pressing member 51 needs to be unlocked from the steering traction assembly 2, the previously compressed elastic member 62 releases the stored energy, and expands and drives the pressing and driving assembly 52 to contract. In this way, the pressure of the flexible pressing member 51 against the steering traction assembly 2 is reduced, and the unlocking operation is achieved.
It should be noted that the specific form of the elastic member 62 may be varied, such as a spring, a spring sheet, an elastic column, etc., which provides more flexibility for practical situations. Meanwhile, in order to more uniformly disperse the pressure and provide a more stable restoring force, the number of the elastic members 62 may be set to be plural and uniformly arranged along the circumferential direction of the first pressing member 521 or the second pressing member 522.
In the process of rotating the driving member 523 in the locking direction, the first pressing member 521 is driven by the driving member 523 to rotate relative to the second pressing member 522. At this time, the first wedge-shaped protrusions 5211 and the second wedge-shaped protrusions 5221 gradually abut, resulting in a gradually increased gap between the first pressing member 521 and the second pressing member 522. During this process, the second pressing member 522 compresses the elastic member 62 connected thereto.
In contrast, when the driving piece 523 rotates in the unlocking direction, the first wedge-shaped protrusion 5211 and the second wedge-shaped protrusion 5221 are gradually separated. In this process, the previously compressed elastic member 62 acts to press the second pressing member 522 toward the first pressing member 521. This causes the gap between the first and second abutments 521 and 522 to gradually decrease until they come together.
This design ensures not only the stability and reliability of the locking mechanism 5, but also the quick locking and unlocking of the steering traction assembly 2 by the flexible pressing member 51 by utilizing the energy storage and release capabilities of the elastic member. At the same time, the uniform arrangement of the plurality of elastic members also contributes to the improvement of balance and durability of the overall structure.
As shown in fig. 1 to 3, in one embodiment of the present application, to avoid the first pressing member 521 from twisting together with the second pressing member 522 when rotating. A plurality of stopper posts 5224 are also provided on the second press 522. The axial direction of the limit post 5224 is parallel to the axial direction of the second pressing member 522. One end of each limiting post 5224 is connected to the second pressing member 522, and is specifically connected to a side of the second pressing member 522 opposite to the second wedge-shaped protrusion 5221, and each limiting post 5224 is uniformly arranged along the circumferential direction of the second pressing member 522. The other end of each of the stopper posts 5224 is inserted into the through hole 611 of the reset substrate 61 and can be extended and contracted with respect to the through hole 611. Under the limiting action of each limiting post 5224, the second pressing piece 522 can only be close to or far away from the reset substrate 61 and cannot rotate relative to the reset substrate 61, so that the first pressing piece 521 is prevented from driving the second pressing piece 522 to twist together when rotating.
As shown in fig. 1 to 3, in one embodiment of the present application, the flexible pressing member 51 is a flexible pressing ring, and when the flexible pressing ring presses against the steering traction assembly 2, the flexible pressing ring is in surface contact with the steering traction assembly 2.
Since the inner ring of the flexible pressing ring is hollow, this can facilitate penetration of the manipulation portion of the steering traction assembly 2 through the flexible pressing ring so as not to interfere with the operation of the steering traction assembly 2. Under the squeezing action of the pressing and driving assembly 52, the friction area between the flexible pressing and driving ring and the steering traction assembly 2 is greatly increased due to the surface contact. This not only enhances the friction between the two, but also helps to prevent unwanted movement of the steering traction assembly 2 during operation.
As shown in fig. 4 and 5, in one embodiment of the present application, the steering traction assembly 2 includes a rocker arm 21, a traction seat 22, a support member 23, and a control rope connection assembly 24, wherein the rocker arm 21 is connected to the traction seat 22, the support member 23 has a support spherical surface, the traction seat 22 is movably connected to the support spherical surface of the support member 23, and the control rope connection assembly 24 is connected to the traction seat 22.
The rocker arm 21 serves as an operator's operating member, and by means of the rocker arm 21, the operator can flexibly control the movement of the fifth wheel 22 on the support 23. The design not only simplifies the operation flow, but also improves the accuracy and response speed of the operation. In order to prevent external dust from entering the steering traction assembly 2 through the gap of the steering traction assembly 2, the rocker arm 21 is further sleeved with a dust cover 25. The middle part of the dust cover 25 is sleeved on the rocker arm 21 to avoid the operator from directly contacting the rocker arm 21. The circumference of the dust cover has folds that connect in turn so that the dust cover can self-expand or contract when the rocker arm 21 swings to accommodate the swing of the rocker arm 21. The connection between the fifth wheel 22 and the support 23 is designed as a spherical connection, which allows the fifth wheel 22 to rotate at any angle on the support 23. This flexibility ensures that the steering traction assembly 2 remains stable in various operating conditions and that accurate steering adjustments can be made according to actual requirements. To further enhance the ease of operation, the outer side of the fifth wheel 22 is also designed to be spherical. This design not only increases the contact area with the flexible pressure member 51, but also ensures a close fit between the two, thereby providing better control during operation. The design of the control cord connection assembly 24 solves the problem of securing the steering control cord 4. By using a combination of the control rope connection sleeve 241 and the limit pin 242, the tail end of the steering control rope 4 is fixed in the control rope connection sleeve 241, while the control rope connection sleeve 241 is inserted on the fifth wheel 22. The function of the limit pin 242 is to further secure the control rope connection sleeve 241, ensuring that the steering control rope 4 is not accidentally loosened or displaced during operation.
The present application also provides an endoscope including the endoscope insertion tube 3 and the self-locking structure of the endoscope insertion tube 3 in the above-described embodiments. Since this endoscope has the self-locking structure of the endoscope insertion tube 3, it also has the advantage of the self-locking structure of the endoscope insertion tube 3.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (10)
1. A self-locking structure of an endoscope insertion tube, comprising:
a housing (1);
the steering traction assembly (2) is arranged in the shell (1), and a steering control rope (4) of the insertion tube (3) is connected to the steering traction assembly (2);
a locking mechanism (5) for locking the steering traction assembly (2); the locking mechanism (5) comprises a flexible pressing piece (51) and a pressing driving assembly (52); when the locking mechanism (5) locks the steering traction assembly (2), the flexible pressing piece (51) presses against the steering traction assembly (2); one end of the pressing driving assembly (52) is connected to the flexible pressing piece (51), and the other end of the pressing driving assembly (52) is connected to the shell (1); the pressing driving assembly (52) is in an unfolding state and a shrinkage state, and when the locking mechanism (5) locks the steering traction assembly (2), the pressing driving assembly (52) is in the unfolding state; the pressing and driving assembly (52) has a plurality of unfolding lengths so as to apply different pressures to the flexible pressing and driving piece (51); when the locking mechanism (5) unlocks the steering traction assembly (2), the pressing driving assembly (52) is in a contracted state, and the pressing driving assembly (52) is contracted so as to reduce the pressure on the flexible pressing piece (51).
2. The self-locking structure of an endoscope insertion tube according to claim 1, wherein the pressing and driving assembly (52) comprises a driving member (523), and a first pressing and abutting member (521) and a second pressing and abutting member (522) which are arranged facing each other, wherein one end of the first pressing and abutting member (521) is movably connected to the housing (1), and one end of the second pressing and abutting member (522) is connected to the flexible pressing and abutting member (51); the driving piece (523) is connected to the first pressing piece (521), and when the pressing driving assembly (52) is in a unfolded state, the driving piece (523) is used for driving the first pressing piece (521) and the second pressing piece (522) to deviate from each other; the driving member (523) is configured to drive the first pressing member (521) and the second pressing member (522) to approach each other when the pressing driving assembly (52) is in the contracted state.
3. The self-locking structure of an endoscope insertion tube according to claim 2, wherein an end of the first pressing member (521) facing the second pressing member (522) has a first wedge-shaped protrusion (5211), and an end of the second pressing member (522) facing the first pressing member (521) has a second wedge-shaped protrusion (5221); the driving piece (523) is used for driving the first pressing piece (521) to rotate around the axial direction of the second pressing piece (522), and when the first pressing piece (521) rotates until the first wedge-shaped bulge (5211) is abutted against the second wedge-shaped bulge (5221), the pressing driving assembly (52) is in a unfolding state; when the first pressing piece (521) rotates to the state that the first wedge-shaped bulge (5211) is separated from the second wedge-shaped bulge (5221), the pressing driving assembly (52) is in a contracted state.
4. A self-locking structure of an endoscope insertion tube according to claim 3, wherein said first wedge-shaped protrusion (5211) comprises a plurality of first protrusions connected in sequence, the protrusion height of each of said first protrusions being gradually increased one by one; and/or, the second wedge-shaped bulge (5221) comprises a plurality of second bulge parts which are connected in sequence, and the bulge height of each second bulge part is gradually increased one by one; when the first pressing piece (521) rotates to the position that the first protruding part and the second protruding part are in contact, the pressing driving assembly (52) has different unfolding lengths.
5. The self-locking structure of an endoscope insertion tube according to claim 4, wherein the second protruding portion includes a slope portion (5222) and a land portion (5223) connected in sequence, the slope portion (5222) being disposed at an angle to the land portion (5223), the slope portion (5222) being connected between adjacent land portions (5223).
6. The self-locking structure of an endoscope insertion tube according to claim 4, wherein the first pressing member (521) has a plurality of first wedge-shaped protrusions (5211), and each of the first wedge-shaped protrusions (5211) is sequentially distributed along a circumferential direction of the first pressing member (521); and/or the second pressing piece (522) is provided with a plurality of second wedge-shaped bulges (5221), and each second wedge-shaped bulge (5221) is distributed along the circumferential direction of the second pressing piece (522) in sequence.
7. The self-locking structure of an endoscope insertion tube according to claim 2, wherein the locking mechanism (5) further comprises a pressing-against reset assembly (6), the pressing-against reset assembly (6) comprises a reset base plate (61) and an elastic member (62), the reset base plate (61) is connected to the housing (1), one end of the elastic member (62) is connected to the reset base plate (61), and the other end of the elastic member (62) is connected to the second pressing-against member (522).
8. The self-locking structure of an endoscope insertion tube according to any one of claims 1 to 7, characterized in that the flexible pressing member (51) is a flexible pressing ring, which is in surface contact with the steering traction assembly (2) when pressed against the steering traction assembly (2).
9. The self-locking structure of an endoscope insertion tube according to any one of claims 1 to 7, characterized in that the steering traction assembly (2) comprises a rocker arm (21), a traction seat (22), a support member (23) and a control rope connection assembly (24), the rocker arm (21) being connected to the traction seat (22), the support member (23) having a supporting sphere, the traction seat (22) being movably connected to the supporting sphere of the support member (23), the control rope connection assembly (24) being connected to the traction seat (22).
10. An endoscope, characterized by comprising an endoscope insertion tube (3) and a self-locking structure of the endoscope insertion tube according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410076357.1A CN117752288A (en) | 2024-01-18 | 2024-01-18 | Self-locking structure of endoscope insertion tube and endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410076357.1A CN117752288A (en) | 2024-01-18 | 2024-01-18 | Self-locking structure of endoscope insertion tube and endoscope |
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| CN117752288A true CN117752288A (en) | 2024-03-26 |
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| CN202410076357.1A Pending CN117752288A (en) | 2024-01-18 | 2024-01-18 | Self-locking structure of endoscope insertion tube and endoscope |
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| CN (1) | CN117752288A (en) |
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