CN118021244A - Traction rope installation method and endoscope - Google Patents

Traction rope installation method and endoscope Download PDF

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Publication number
CN118021244A
CN118021244A CN202410433385.4A CN202410433385A CN118021244A CN 118021244 A CN118021244 A CN 118021244A CN 202410433385 A CN202410433385 A CN 202410433385A CN 118021244 A CN118021244 A CN 118021244A
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CN
China
Prior art keywords
flexible catheter
adhesive
handle housing
proximal end
traction rope
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Granted
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CN202410433385.4A
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Chinese (zh)
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CN118021244B (en
Inventor
周震华
张翔
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Hunan Vathin Medical Instrument Co Ltd
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Hunan Vathin Medical Instrument Co Ltd
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Priority to CN202410433385.4A priority Critical patent/CN118021244B/en
Priority claimed from CN202410433385.4A external-priority patent/CN118021244B/en
Publication of CN118021244A publication Critical patent/CN118021244A/en
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Publication of CN118021244B publication Critical patent/CN118021244B/en
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Abstract

The invention provides a traction rope installation method and an endoscope, relates to the technical field of endoscopes, and solves the problem that the tensioning degree of an existing traction rope is inconvenient to adjust. The traction rope installation method is applied to an endoscope. The distance between the proximal end of the flexible catheter and the traction wheel is adjusted while the traction wheel and the active bending section of the insertion portion are fixed such that a section of the traction rope threaded in the flexible catheter from the location connected to the traction wheel to the proximal end of the flexible catheter reaches a predetermined tension, after which at least a portion of the tube section of the flexible catheter located inside the handle housing is fixed to the handle housing such that a section of the traction rope from the location connected to the traction wheel to the proximal end of the flexible catheter is maintained at the predetermined tension. The method utilizes the flexible conduit sleeved outside the traction rope and the distal end of which is fixed relative to the handle shell or the insertion part, so that the tensioning degree of the traction rope can be conveniently and rapidly adjusted under the condition that the traction rope is complete.

Description

Traction rope installation method and endoscope
Technical Field
The invention relates to the technical field of endoscopes, in particular to a traction rope installation method and an endoscope.
Background
The existing endoscope works on the principle that the insertion part is inserted into the human body through a natural cavity channel or a cavity channel which is artificially constructed for examination or treatment. After the endoscope stretches into the human body, diagnosis information is provided for doctors through the camera module, and if necessary, treatment instruments can be inserted into the endoscope to finish sampling or treatment of the lesion part, or a negative pressure source is attached to collect tissue samples of the lesion part. The direction of the far-end component is required to be adjusted at any time to enable the camera module and the orifice of the instrument tube to be aligned to each position of the lesion.
Adjusting the pointing direction of the distal assembly requires that the traction wheels are rotated by manual force to respectively pull the two traction ropes to transmit deflection power to the distal assembly, so that the distal assembly changes the pointing direction.
Due to manufacturing errors and assembly errors, the installed pull-cord may not reach the prescribed tension, which may cause the distal assembly to be directed to a delayed response and out of position adjustment. Therefore, in the related art, a tightness adjusting mechanism is added at the middle part of the traction rope to adjust the tensioning degree of the traction rope in the future, for example, the middle of the traction rope is broken, two breakpoint parts are exposed out of a flexible catheter and are respectively arranged on a threaded pipe and a threaded column which are in threaded butt joint with each other, when the tensioning degree of the installed traction rope does not reach the standard, the distance between the two breakpoints can be adjusted by rotating the threaded pipe or the threaded column, so that the length of the traction rope is changed to adjust the tensioning degree of the traction rope.
In the related art, the tightness adjustment of the traction rope is realized by arranging the tightness adjustment mechanism, so that the problem of inconvenient adjustment process of the tensioning degree of the traction rope exists.
Disclosure of Invention
The invention aims to provide a traction rope installation method and an endoscope, which are used for solving the problem that the tensioning degree of a traction rope is inconvenient to adjust.
The invention is realized by the following technical scheme:
the invention provides a traction rope installation method, which is applied to an endoscope and comprises the following steps:
A step of sleeving the flexible catheter to a site on the pull-cord between the proximal end and the distal end;
Connecting the proximal and distal ends of the traction rope to the traction wheel and the distal end of the active bending section of the insertion portion, respectively;
a step of securing the distal end of the flexible catheter to the proximal end of the passive curved section of the insertion portion or the active curved section of the insertion portion or the handle housing;
A step of mounting the traction wheel and the insertion portion to the handle housing;
Fixing the traction wheel and the active bending section of the insertion part relative to the connected handle shell, and adjusting the distance between the proximal end of the flexible catheter and the traction wheel so as to enable a section between the part connected with the traction wheel and the proximal end of the flexible catheter on the traction rope penetrating through the flexible catheter to reach a preset tensioning degree;
And a step of fixing at least a part of the tube section of the flexible catheter located inside the handle housing to the handle housing so that a section of the pulling rope from a portion connected to the pulling wheel to a proximal end of the flexible catheter is maintained at a predetermined tension.
Under the condition of adopting the method, the flexible conduit sleeved outside the traction rope is utilized in the process of adjusting the tensioning degree of the traction rope.
Since the tube diameter of the flexible conduit used to provide protection and guidance for the pull-cord is quite close to the diameter of the pull-cord and the flexible conduit can be considered as not being compressible along the axis, the trend of the flexible conduit, i.e. the trend of the pull-cord in the flexible conduit, the length of the pull-cord in the flexible conduit is equal to the length of the flexible conduit.
Since the distal end of the flexible catheter or the portion of the passive bending section penetrating the insertion portion is fixed relative to the handle housing, the degree of bending of the proximal end of the flexible catheter to the section distal to the handle housing can be varied by adjusting the distance of the proximal end of the flexible catheter relative to the traction wheel.
Since the traction wheel and the active bending section are fixed relative to the connected handle housing, the length of the traction rope inside the handle housing is determined, and thus the bending degree of the traction rope in the corresponding rope portion of the flexible catheter is synchronously changed during the adjustment of the distance of the proximal end of the flexible catheter relative to the traction wheel.
Thus, by adjusting the distance between the proximal end of the flexible catheter and the traction wheel, the center of gravity of the traction rope positioned on the inner side of the handle shell can be integrally close to or far away from the traction wheel, so that the tensioning degree of the section from the traction wheel to the proximal end of the flexible catheter on the traction rope can be adjusted. Under the condition of ensuring the integrity of the traction rope, the tensioning degree of the traction rope can be conveniently and rapidly adjusted in the assembly process, so that a section from the part connected with the traction wheel to the proximal end of the flexible catheter on the traction rope reaches the preset tensioning degree. In addition, in the handle housing, an additional tightness adjusting mechanism is not required to be added to adjust the tensioning degree of the traction rope, a larger space can be reserved in the handle housing to facilitate arrangement and adjustment of various components, or the handle housing can be designed to be more compact.
Further, the step of securing at least a portion of the tube segment of the flexible conduit inside the handle housing to the handle housing such that a section of the pull cord from the location of connection with the pull wheel to the proximal end of the flexible conduit is maintained at a predetermined tension comprises: an adhesive is added between the handle housing and the flexible conduit to adhesively secure at least a portion of the tube segment of the flexible conduit that is inside the handle housing to the handle housing.
Under the condition of adopting the method, the traction rope with the tensioning degree adjusted by adopting the adhesive is beneficial in that the structure for fixing the flexible catheter on the handle shell is simpler, and the process for fixing the flexible catheter is simpler and more convenient.
Further, adding an adhesive between the handle housing and the flexible conduit to adhesively secure at least a portion of a tube segment of the flexible conduit located inside the handle housing to the handle housing includes: under the condition that a section of the traction rope from a part connected with the traction wheel to the proximal end of the flexible catheter is maintained at a preset tensioning degree, adding a first adhesive to fix a first fixed part on the flexible catheter and the handle shell in a gluing way; after the first adhesive is cured, a second adhesive is added to adhesively secure a second securing location on the flexible catheter to the handle housing to strengthen the adhesive bond between the flexible catheter and the handle housing, wherein the second securing location is closer to the distal end of the flexible catheter than the first securing location.
Further, adding an adhesive between the handle housing and the flexible conduit to adhesively secure at least a portion of a tube segment of the flexible conduit located inside the handle housing to the handle housing further comprises: after the first adhesive is cured, a third adhesive is added to adhesively bond a third fixed part of the flexible catheter, which is closer to the proximal end of the flexible catheter than the first fixed part, to the handle housing to strengthen the adhesive strength between the flexible catheter and the handle housing while maintaining a section of the traction rope from the part connected with the traction wheel to the proximal end of the flexible catheter at a preset tension.
Further, the curing time of the first adhesive is shorter than the curing time of the second adhesive and the third adhesive, and/or the curing strength of the first adhesive is lower than the curing strength of the second adhesive and the third adhesive, and/or the curing hardness of the first adhesive is lower than the curing hardness of the second adhesive and the third adhesive.
Further, after the first adhesive is cured, while maintaining a predetermined tension in a section of the traction rope from the portion connected to the traction wheel to the proximal end of the flexible catheter, adding a third adhesive to adhesively bond a third fixing portion of the flexible catheter closer to the proximal end of the flexible catheter than the first fixing portion to the handle housing to strengthen the adhesive strength between the flexible catheter and the handle housing includes: if the length of the traction rope from the part connected with the traction wheel to the proximal end of the flexible catheter is not maintained at a preset tension level before the third adhesive is added, the distance between the proximal end of the flexible catheter and the traction wheel is adjusted so that the length of the traction rope from the part connected with the traction wheel to the proximal end of the flexible catheter is restored to the preset tension level, and then the third adhesive is added.
With the above method, when the third fixing portion, which is closer to the proximal end of the flexible catheter than the first fixing portion, is fixed to the handle housing, it is possible to allow the tension of the section of the traction rope from the portion connected to the traction wheel to the proximal end of the flexible catheter to be finely adjusted again, so that the section of the traction rope from the portion connected to the traction wheel to the proximal end of the flexible catheter can be adjusted to a preset tension more accurately. Therefore, the precision requirement for fixing the first fixed part on the flexible catheter can be reduced, the subsequent calibration is reserved, and the tensioning degree of the traction rope is adjusted more conveniently and rapidly.
The invention provides an endoscope, which comprises a traction rope, a flexible catheter, a traction wheel, an insertion part and a handle shell, wherein the insertion part comprises a passive bending section and an active bending section which are sequentially connected; the traction wheel and the passive bending section of the insertion part are respectively arranged on the handle shell; the proximal end and the distal end of the traction rope are respectively connected with the traction wheel and the distal end of the active bending section; the flexible catheter is sleeved on the traction rope, and the distal end of the flexible catheter is fixed at the proximal end of the passive bending section or the active bending section or the handle shell; at least a portion of the tube section of the flexible conduit located inside the handle housing is secured to the handle housing such that the proximal end of the flexible conduit is fixed relative to the traction wheel such that a length of the traction rope from the location of connection with the traction wheel to the proximal end of the flexible conduit is maintained at a predetermined tension.
When the structure is adopted, the distal end of the flexible conduit sleeved on the traction rope is fixed on the proximal end of the passive bending section or the active bending section or the handle shell, and at least part of the pipe section on the inner side of the handle shell is fixed on the handle shell, so that the flexible conduit provides a definite trend for the traction rope on the inner side of the handle shell. Under this kind of structure, in the assembly cover is equipped with the in-process of flexible pipe haulage rope, can adjust the tensioning degree of haulage rope through the crooked degree of adjusting flexible pipe, this makes the regulation of tensioning degree of haulage rope more convenient.
Further, in order to better realize the invention, the following arrangement structure is adopted: at least part of the pipe section of the flexible conduit, which is positioned at the inner side of the handle shell, is fixedly connected with the handle shell through the addition of adhesive.
Further, in order to better realize the invention, the following arrangement structure is adopted: the pipe section on the flexible catheter, which is positioned on the inner side of the handle shell, is provided with a first fixing part, a second fixing part and a third fixing part, the second fixing part and the third fixing part are respectively closer to the far end and the near end of the flexible catheter than the first fixing part, and the first fixing part, the second fixing part and the third fixing part are respectively bonded and fixed with the handle shell through a first adhesive, a second adhesive and a third adhesive which are respectively added.
When adopting above-mentioned setting structure, arrange third fixed part, first fixed part and second fixed part in proper order along flexible catheter's axis for there are three fixed point positions of arranging in proper order between flexible catheter and the handle casing, not only can be at the tensioning degree of assembly flexible catheter's in-process fine tuning haulage rope, can also improve flexible catheter's bending degree's stability, make flexible catheter can provide stable direction for the haulage rope, let the deflection action of the distal end subassembly of insert portion more quick accuracy.
Further, in order to better realize the invention, the following arrangement structure is adopted: the first adhesive has a lower cure hardness and a lower cure strength than the second adhesive and/or the third adhesive.
By adopting the arrangement structure, the curing hardness and the curing strength of the first adhesive are smaller than those of the second adhesive and/or the third adhesive, so that the reinforcing effect on the flexible catheter can be ensured.
Further, in order to better realize the invention, the following arrangement structure is adopted: the curing time of the first adhesive is shorter than the curing time of the second adhesive and the third adhesive.
By adopting the arrangement structure, the curing time of the first adhesive is shorter than that of the second adhesive and the third adhesive, so that the flexible catheter can be coarsely adjusted more quickly when being fixed for the first time, and the tensioning degree of the traction rope can be finely adjusted subsequently when the tensioning degree of the traction rope does not reach the preset tensioning degree, so that the flexible catheter can be fixed on the handle shell more conveniently and quickly, and the tensioning degree of the traction rope is adjusted.
Further, in order to better realize the invention, the following arrangement structure is adopted: the handle shell inner wall is provided with a first wire groove, a second wire groove and a third wire groove, the first fixed part, the second fixed part and the third fixed part are respectively accommodated in the first wire groove, the second wire groove and the third wire groove, the first adhesive is filled in the first wire groove and covers the first fixed part, the second adhesive is filled in the second wire groove and covers the second fixed part, and the third adhesive is filled in the third wire groove and covers the third fixed part.
When the structure is adopted, the first wire groove, the second wire groove and the third wire groove can increase the connection area with the adhesive, so that the first fixing part, the second fixing part and the third fixing part on the flexible catheter can be more stably fixed with the handle shell. The first wire groove, the second wire groove and the third wire groove can also better limit the position of the flexible conduit, so that the flexible conduit can be fixed with the handle shell through the adhesive more easily.
Further, in order to better realize the invention, the following arrangement structure is adopted: the flexible catheter is characterized in that a pipe section positioned on the inner side of the handle shell is further provided with a fourth fixed part, the fourth fixed part is closer to the proximal end of the flexible catheter than the third fixed part, and the inner wall of the handle shell is provided with a fourth wire slot capable of accommodating the fourth fixed part.
When the structure is adopted, a certain length is further reserved between the third fixed part and the proximal end of the flexible catheter, so that the distance between the proximal end of the flexible catheter and the traction wheel can be adjusted when the traction rope is loosened in the use process, the fourth fixed part and the handle shell are fixed, the tensioning degree of the traction rope is adjusted again, and the service life of the endoscope is prolonged.
Further, in order to better realize the invention, the following arrangement structure is adopted: the inner wall of the handle shell is provided with a first containing cavity with an open top between the first fixing part and the second fixing part, a second containing cavity with an open top between the first fixing part and the third fixing part and a third containing cavity with an open top between the third fixing part and the fourth fixing part, and the flexible catheter sequentially spans from the top openings of the first containing cavity, the second containing cavity and the third containing cavity.
When adopting above-mentioned setting structure, haulage rope is followed in proper order first hold the chamber, the second hold the chamber with the top opening part in third holds the chamber stridees across for can conveniently adjust the mode of pushing down the flexible pipe towards corresponding hold the intracavity to the tensioning degree of haulage rope.
The invention has the following advantages and beneficial effects:
In the invention, the distal end of the flexible conduit sleeved on the traction rope is fixed on the proximal end of the passive bending section or the active bending section or the handle shell, and at least part of the pipe section on the inner side of the handle shell is fixed on the handle shell, so that the flexible conduit provides a definite trend for the traction rope on the inner side of the handle shell. Under this kind of structure, in the assembly cover is equipped with the in-process of flexible pipe haulage rope, can adjust the tensioning degree of haulage rope through the crooked degree of adjusting flexible pipe, this makes the regulation of tensioning degree of haulage rope more convenient.
In the process of adjusting the tensioning degree of the hauling rope, a flexible conduit sleeved outside the hauling rope is utilized. Since the tube diameter of the flexible conduit used to provide protection and guidance for the pull-cord is quite close to the diameter of the pull-cord and the flexible conduit can be considered as not being compressible along the axis, the trend of the flexible conduit, i.e. the trend of the pull-cord in the flexible conduit, the length of the pull-cord in the flexible conduit is equal to the length of the flexible conduit. Since the distal end of the flexible catheter or the portion of the passive bending section penetrating the insertion portion is fixed relative to the handle housing, the degree of bending of the proximal end of the flexible catheter to the section distal to the handle housing can be varied by adjusting the distance of the proximal end of the flexible catheter relative to the traction wheel. Since the traction wheel and the active bending section are fixed relative to the connected handle housing, the length of the traction rope inside the handle housing is determined, and thus the bending degree of the traction rope in the corresponding rope portion of the flexible catheter is synchronously changed during the adjustment of the distance of the proximal end of the flexible catheter relative to the traction wheel. Thus, by adjusting the distance between the proximal end of the flexible catheter and the traction wheel, the center of gravity of the traction rope positioned on the inner side of the handle shell can be integrally close to or far away from the traction wheel, so that the tensioning degree of the section from the traction wheel to the proximal end of the flexible catheter on the traction rope can be adjusted. Under the condition of ensuring the integrity of the traction rope, the tensioning degree of the traction rope can be conveniently and rapidly adjusted in the assembly process, so that a section from the part connected with the traction wheel to the proximal end of the flexible catheter on the traction rope reaches the preset tensioning degree. In addition, in the handle housing, an additional tightness adjusting mechanism is not required to be added to adjust the tensioning degree of the traction rope, a larger space can be reserved in the handle housing to facilitate arrangement and adjustment of various components, or the handle housing can be designed to be more compact.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a structure within a handle housing of an endoscope at a first view angle;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 illustrates the portion of FIG. 2 in a configuration where the flexible catheter is not connected to the handle housing;
FIG. 4 illustrates the portion of FIG. 2 in a configuration where a first attachment site of the flexible catheter is coupled to the handle housing;
FIG. 5 illustrates the portion of FIG. 2 in a configuration where the first and second attachment sites of the flexible catheter are coupled to the handle housing;
FIG. 6 shows a partial structure within the handle housing of the endoscope at a second view angle;
FIG. 7 is an enlarged view of part B of FIG. 6;
FIG. 8 shows the internal structure of one half of the handle housing;
fig. 9 is an enlarged view of a portion C in fig. 8.
Marked in the figure as:
1. a traction rope; 2. a flexible catheter; 3. a traction wheel; 4. a passive bending section; 5. an active bending section;
6. A handle housing; 61. a first wire chase; 62. a second wire slot; 63. a third wire chase; 64. a fourth wire chase; 65. a first cavity; 66. a second cavity; 67. a third cavity; 6a, side plates; 6b, a separator;
7. A first adhesive; 8. a second adhesive; 9. and a third adhesive.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In the description of the present invention, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
The inventor finds that in the research, the mode of realizing the tightness adjustment of the traction rope by arranging the tightness adjustment mechanism in the related technology not only has the problem of inconvenient adjustment process of the tensioning degree of the traction rope, but also has the problem of complex structure, so that the added tightness adjustment mechanism occupies more space in the operation part, causes the condition of large arrangement difficulty of each pipeline, and also causes the condition of overlarge handle size.
In one aspect, the present application provides an endoscope, as shown in FIGS. 1-9, specifically configured to:
In this embodiment, as shown in fig. 1, the endoscope comprises a handle housing 6, a traction wheel 3, an insertion portion, a traction rope 1 and a flexible catheter 2, wherein the insertion portion comprises a passive bending section 4 and an active bending section 5 which are sequentially connected, and in the figure, in order to show the internal structure of the handle housing 6, half sides are removed, and an endoscope with half sides of the handle housing 6 is shown.
The traction wheel 3 is rotatably mounted to the handle housing 6 near the proximal end, and the passive bending section 4 of the insertion section is mounted to the distal end of the handle housing 6.
Part of the hauling cable 1 is accommodated in the handle housing 6, and the other part is threaded into the insertion portion from the distal end of the handle housing 6. The distal end of the traction rope 1 is fixedly connected to the traction wheel 3, and the proximal end is fixedly connected to the distal end of the active bending section 5 of the insertion part.
The traction ropes 1 are used in different numbers, such as 2 or 4, depending on the direction in which the active bending section 5 of the insert needs to be adjusted. One or two traction wheels 3 are arranged according to the number of the traction ropes 1, and two traction ropes 1 are fixed on one traction wheel 3 and used for controlling the reciprocating adjustment of the active bending section 5 in one direction.
Each hauling cable 1 is sleeved with a flexible conduit 2, and a part of the flexible conduit 2 can penetrate into the insertion part from the distal end of the handle shell 6 in the handle shell 6 according to the different lengths of the flexible conduit, so that the distal end is fixed on the proximal end of the passive bending section 4 or the active bending section 5, and can also be integrally positioned in the handle shell 6, so that the distal end is fixed on the handle shell 6.
The diameter of the flexible conduit 2 is very close to the diameter of the hauling cable 1, so that only one hauling cable 1 can be penetrated in the flexible conduit 2, and good guiding and protection are provided for the hauling cable 1 therein.
The flexible catheter 2 is basically a tube which cannot be compressed along the axis, or can be simultaneously a tube which cannot be stretched along the axis or is difficult to be stretched along the axis, and specifically, the flexible catheter can be a spring tube which can be stretched along the axis, a braided tube, a round tube or the like, and the flexible catheter can be made of metal or plastic.
At least part of the tube section of the flexible catheter 2 located inside the handle housing 6 is fixed to the handle housing 6 in a certain form, and the distance between the proximal end of the flexible catheter 2 and the traction wheel 3 is fixed, which determines the trend of the traction rope 1 penetrating through the flexible catheter 2 and the concentration of slack in a part from the proximal end to the distal end of the flexible catheter 2 located inside the handle housing 6, so that a section of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible catheter 2 is in a tight state and maintained at a preset tension degree, and under the preset tension degree, the traction wheel 3 and the active bending section 5 of the insertion part have a good follow-up property, and the bending of the active bending section 5 can be accurately controlled by pulling the deflector rod, so that the pointing direction of a distal end component mounted at the distal end of the active bending section 5 can be accurately regulated.
The predetermined tension level may be a determined point value or a range of values. The preset tightening level may be, for example, the magnitude of the generated elastic force of the traction rope 1 in case the traction wheel 3 is not shifted. When the traction rope 1 is tensioned, the traction rope 1 receives a certain tensile force, and the traction rope 1 generates an elastic force equal to the tensile force. Therefore, in some embodiments, the above method can enable the traction rope to generate elastic force with a preset magnitude after being installed, so that the traction wheel 3 and the active bending section have better follow-up property.
In this embodiment, the flexible catheter 2 sleeved on the pulling rope 1 of the endoscope cannot be compressed axially, the distal end of the flexible catheter 2 is fixed on the proximal end of the passive bending section 4 or the active bending section 5 or the handle housing 6, and at least part of the tube section on the inner side of the handle housing 6 is fixed on the handle housing 6, so that the flexible catheter 2 provides a definite trend for the pulling rope 1 on the inner side of the handle housing 6. With this structure, in the process of assembling the traction rope 1 sleeved with the flexible conduit 2, the tension degree of a section from the part connected with the traction wheel 3 to the proximal end of the flexible conduit 2 on the traction rope 1 can be adjusted by adjusting the bending degree of the flexible conduit 2, so that the tension degree of the traction rope 1 can be adjusted more conveniently.
According to some alternative embodiments, the part of the flexible conduit 2 located inside the handle housing 6 is fixed to the handle housing 6 by gluing with an adhesive.
The bonding site of the flexible catheter 2 and the handle housing 6 may be one site as shown in fig. 4, two sites as shown in fig. 5, three sites as shown in fig. 2, or the like. If there are a plurality of glue sites of the flexible catheter 2 and the handle housing 6, the glue sites are arranged in sequence along the axial direction of the flexible catheter 2.
Illustratively, as shown in fig. 4, the bonding part of the flexible catheter 2 and the handle housing 6 is set at one position, a first adhesive 7 is added between the first fixing part on the flexible catheter 2 and the handle housing 6, and the first adhesive 7 fixes the first fixing part of the flexible catheter 2 and the handle housing 6 after being cured.
Illustratively, as shown in fig. 5, the bonding portion between the flexible catheter 2 and the handle housing 6 is set to be a first fixing portion and a second fixing portion, the second fixing portion is closer to the distal end of the flexible catheter 2 than the first fixing portion, when the flexible catheter 2 and the handle housing 6 are fixed, a first adhesive 7 is added between the first fixing portion on the flexible catheter 2 and the handle housing 6, the first adhesive 7 is cured to fix the first fixing portion of the flexible catheter 2 and the handle housing 6, and then a second adhesive 8 is added between the second fixing portion on the flexible catheter 2 and the handle housing 6, and the second adhesive 8 is cured to fix the second fixing portion of the flexible catheter 2 and the handle housing 6. Of course, the bonding site between the flexible catheter 2 and the handle housing 6 may be only the first fixing site shown in fig. 2 and the third fixing site closer to the proximal end of the flexible catheter 2 than the first fixing site, so that after the first fixing site of the flexible catheter 2 is bonded to the handle housing 6, the third adhesive 9 is added between the third fixing site on the flexible catheter 2 and the handle housing 6, and after the third adhesive 9 is cured, the third fixing site of the flexible catheter 2 is fixed to the handle housing 6.
Illustratively, as shown in fig. 2 and 7, the glue joint of the flexible catheter 2 and the handle housing 6 is provided in three places, wherein the second and third fixing locations are closer to the distal and proximal ends of the flexible catheter 2 than the first fixing location, respectively. When the flexible catheter 2 and the handle housing 6 are fixed, a first adhesive 7 is added between a first fixing part on the flexible catheter 2 and the handle housing 6, the first adhesive 7 is cured to fix the first fixing part of the flexible catheter 2 and the handle housing 6, then, according to the need, a second adhesive 8 is added between a second fixing part on the flexible catheter 2 and the handle housing 6, after the second adhesive 8 is cured, the second fixing part of the flexible catheter 2 and the handle housing 6 are fixed, or a third adhesive 9 is added between a third fixing part on the flexible catheter 2 and the handle housing 6, after the third adhesive 9 is cured, the third fixing part of the flexible catheter 2 and the handle housing 6 are fixed.
The tension of the section of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible catheter 2 needs to be adjusted in advance before the first fixing part on the flexible catheter 2 is fixed, and the section of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible catheter 2 can be maintained at a preset tension after the first fixing part is fixed on the handle housing 6.
In this embodiment, after the flexible catheter 2 is fixed by the first fixing portion and the handle housing 6 by gluing, the second fixing portion or the third fixing portion is fixed by gluing with the handle housing 6, so that stability of the bending degree of the flexible catheter 2 can be improved, and the flexible catheter 2 can provide stable guiding for the traction rope 1. After the first fixing portion is glued to the handle housing 6, the proximal end position of the flexible catheter 2 may be changed excessively due to some reasons during operation, so that a section of the traction rope 1 from the portion connected with the traction wheel 3 to the proximal end of the flexible catheter 2 is not maintained at a preset tension, and when the flexible catheter 2 has a third fixing portion closer to the proximal end of the flexible catheter 2 than the first fixing portion, the proximal end of the flexible catheter 2 can be maintained at a preset tension by adjusting the distance between the proximal end of the flexible catheter 2 and the traction wheel 3 again later, so that the deflection action of the distal end assembly of the insertion portion is faster and more accurate. Under the condition that a first fixed part and a second fixed part exist on the flexible catheter 2 at the same time, the distance between the proximal end of the flexible catheter 2 and the traction wheel 3 can be preliminarily adjusted in a rough mode, after the first fixed part is fixedly glued with the handle shell 6, the distance between the proximal end of the flexible catheter 2 and the traction wheel 3 is finely adjusted, and finally the third fixed part is fixedly glued with the handle shell 6, so that the installation speed of the flexible catheter 2 can be improved and the tensioning degree of the traction rope 1 can be better ensured through two-time adjustment.
According to some alternative embodiments, the first adhesive 7 has a lower cure hardness and cure strength than the second adhesive 8 and/or the third adhesive 9. After the first fixing portion of the flexible catheter 2 is adhesively fixed to the handle housing 6, the position of the flexible catheter 2 can be adjusted more easily by pulling or the like, the reinforcing effect on the flexible catheter 2 can be ensured, or the flexible catheter 2 can be detached from the handle housing 6 for re-fixing after the cured first adhesive 7 is broken more easily.
The curing time of the first adhesive 7 is shorter than the curing time of the second adhesive 8 and the third adhesive 9, which allows the flexible conduit 2 to be fixed more quickly for rough adjustment. When the tension of the traction rope 1 does not reach the preset tension, the tension can be finely adjusted later, so that the flexible catheter 2 can be more conveniently and quickly fixed on the handle shell 6, and the tension of the traction rope 1 is adjusted.
At least one of the first adhesive 7, the second adhesive 8 and the third adhesive 9 adopts UV glue, wherein the second adhesive 8 and the third adhesive 9 may be the same or different.
According to some alternative embodiments, as shown in fig. 9, a wire groove for accommodating the flexible catheter 2 is provided on the inner wall of the handle housing 6, so that the fixing portion on the flexible catheter 2 can be more easily and stably fixed on the handle housing 6.
In some cases, as shown in fig. 2 and 9, for example, in the case where three glue joint portions of the first fixing portion, the second fixing portion and the third fixing portion are simultaneously provided on the flexible catheter 2, three wire grooves are correspondingly provided on the inner wall of the handle housing 6 to accommodate the first fixing portion, the second fixing portion and the third fixing portion, respectively. The three wire grooves include a third wire groove 63, a first wire groove 61, and a second wire groove 62 arranged in order along the axis of the flexible catheter 2 from the proximal end to the distal end.
The first wire groove 61, the second wire groove 62 and the third wire groove 63 are formed at the top ends of three partition plates 6b erected on the inner wall of the handle housing 6, respectively, so that the flexible catheter 2 is lifted off the inner wall of the handle housing 6.
The first fixing portion, the second fixing portion, and the third fixing portion of the flexible catheter 2 are respectively accommodated in the first wire groove 61, the second wire groove 62, and the third wire groove 63, and it is preferable that a plurality of flexible catheters 2 are accommodated in the first wire groove 61, the second wire groove 62, and the third wire groove 63 side by side. The first adhesive 7 is filled in the first wire groove 61 and covers the first fixing portion of the flexible catheter 2, the second adhesive 8 is filled in the second wire groove 62 and covers the second fixing portion of the flexible catheter 2, the third adhesive 9 is filled in the third wire groove 63 and covers the third fixing portion of the flexible catheter 2, and the root flexible catheters 2 are glued and fixed with the handle housing 6 at three positions one by one in a glue dispensing manner.
In this embodiment, the first wire groove 61, the second wire groove 62 and the third wire groove 63 are provided at the top end of the partition plate 6b, and besides providing three surfaces of the groove wall and the groove bottom, two plate surfaces of the partition plate 6b can be provided, so that the connection area with the adhesive can be increased, and the first fixing portion, the second fixing portion and the third fixing portion on the flexible catheter 2 can be more stably fixed to the handle housing 6. The first wire groove 61, the second wire groove 62 and the third wire groove 63 can also better restrict the position of the flexible catheter 2, so that the flexible catheter 2 can be more easily fixed with the handle housing 6 by an adhesive.
The distance between the third wire groove 63 and the first wire groove 61 is large enough that after the first fixing portion of the flexible catheter 2 is glued to the first wire groove 61, the length of the flexible catheter 2 between the first wire groove 61 and the third wire groove 63 can be conveniently controlled to adjust the distance between the proximal end of the flexible catheter 2 and the traction wheel 3. For example, the distance between the proximal end of the flexible catheter 2 and the traction wheel 3 can be adjusted by inserting a compression bar or screwing a stud between the first wire groove 61 and the third wire groove 63 to press the tube section of the flexible catheter 2 down against the inner wall of the handle housing 6.
According to some alternative embodiments, as shown in fig. 9, the tube section of the flexible catheter 2 located inside the handle housing 6 has a length between the first fixing location and the proximal end in addition to the first fixing location, so as to leave a fourth fixing location.
In some cases, a fourth wire groove 64 capable of accommodating a fourth fixing portion is provided on the inner wall of the handle housing 6, and the fourth wire groove 64 is formed on the top end of a partition 6b standing on the inner wall of the handle housing 6. The fourth fixing portion is a reserved fixing portion, and as shown in fig. 2, in the assembled endoscope, the fourth fixing portion of the flexible catheter 2 is not fixed to the fourth wire groove 64, and may be located outside the fourth wire groove 64 in a free state. When the pulling rope 1 loosens after the endoscope is used for a period of time, the handle shell 6 can be disassembled to automatically or by a manufacturer adjust the distance between the proximal end of the flexible catheter 2 and the pulling wheel 3, the fourth fixing part is placed into the fourth wire slot 64 and is fixed with the handle shell 6 in a dispensing mode, so that the tensioning degree of the pulling rope 1 is adjusted again, and the service life of the endoscope is prolonged.
Preferably, the flexible catheter 2 has a first fixing site, a second fixing site, a third fixing site and a fourth fixing site at the same time. The fourth fixation location is closer to the proximal end of the flexible catheter 2 than the third fixation location. When the traction rope 1 is loosened in the use process, the distance between the proximal end of the flexible catheter 2 and the traction wheel 3 can be adjusted, and the fourth fixing part and the handle shell 6 are fixed, so that the tensioning degree of the traction rope 1 is adjusted again, and the service life of the endoscope is prolonged. In order to facilitate the subsequent adjustment of the tensioning degree of the traction rope 1 by the user, the distance between the fourth fixing part and the third fixing part is larger than the distance between the third fixing part and the first fixing part, so that the user can directly adjust the tensioning degree of the traction rope 1 by pressing the pipe section of the flexible conduit 2 between the fourth wire groove 64 and the third wire groove 63 by means of a finger. After the tensioning degree of the traction rope 1 is adjusted, the fourth fixing portion of the flexible catheter 2 and the fourth wire groove 64 can be fixed in any feasible manner, and of course, the fourth fixing portion of the flexible catheter 2 can also be directly fixed with other positions on the handle housing 6 or with parts mounted on the handle housing 6.
According to some alternative embodiments, as shown in fig. 2 and 9, the first fixing portion, the second fixing portion and the third fixing portion of the flexible catheter 2 are respectively accommodated in the first wire groove 61, the second wire groove 62 and the third wire groove 63 at the top end of the partition 6b and fixed by dispensing, and the fourth fixing portion of the flexible catheter 2 is located from the side of the fourth wire groove 64 at the top end of the partition 6 b.
A side plate 6a is respectively arranged on two opposite sides of the four partition plates 6b on the inner wall of the handle shell 6, the four partition plates 6b are sequentially connected by the side plate 6a, a first containing cavity 65 with four surrounding parts and an open top is formed between the first fixing part and the second fixing part, a second containing cavity 66 with four surrounding parts and an open top is formed between the first fixing part and the third fixing part, a third containing cavity 67 with four surrounding parts and an open top is formed between the third fixing part and the fourth fixing part, and the flexible catheter 2 is sequentially supported on the fourth wire groove 64, the third wire groove 63, the first wire groove 61 and the second wire groove 62 along the axial direction of the flexible catheter and sequentially spans from the top openings of the third containing cavity 67, the second containing cavity 66 and the first containing cavity 65.
In this embodiment, the traction rope 1 spans from the top openings of the first accommodating cavity 65, the second accommodating cavity 66 and the third accommodating cavity 67 in sequence, so that the adjustment of the tensioning degree of the traction rope 1 can be conveniently adjusted by pressing down the flexible catheter 2 towards the corresponding accommodating cavity. The first adhesive 7, the second adhesive 8, and the third adhesive 9 may be in contact with the inner surfaces of the side plates 6a on both sides, thereby increasing the bonding area.
In another aspect, the present application provides a method of installing a pull-cord for use with an endoscope, preferably any of the embodiments described above, for adjusting the tension of the pull-cord.
The traction rope installation method comprises the following steps:
A step of fitting the flexible catheter 2 to a portion of the pull cord 1 between the proximal and distal ends.
A step of connecting the proximal and distal ends of the traction rope 1 to the distal ends of the traction wheel 3 and the active bending section 5 of the insertion portion, respectively.
A step of fixing the distal end of the flexible catheter 2 to the proximal end of the passive bending section 4 of the insertion portion or the active bending section 5 of the insertion portion or the handle housing 6.
A step of mounting the traction wheel 3 and the insert to the handle housing 6.
The step of fixing the traction wheel 3 and the active bending section 5 of the insertion part relative to the connected handle housing 6 and adjusting the distance of the proximal end of the flexible catheter 2 relative to the traction wheel 3 such that a section of the traction rope 1 threaded in the flexible catheter 2 from the location connected to the traction wheel 3 to the proximal end of the flexible catheter 2 reaches a preset degree of tension. In this step, the traction wheel 3 and the active bending section 5 of the insertion portion may be fixed by a clamp, for example, by clamping two sides of the active bending section 5 in the bending direction, so that the active bending section 5 cannot bend, and simultaneously, the traction wheel 3 is prevented from rotating when the traction rope 1 is pulled by clamping the road surface at one end of the traction wheel and the outer wall of the handle housing 6 by the clamp. The fixing of the traction wheel 3 can also be achieved by fixing the traction wheel axle or the like. The tension of the traction rope 1 can be adjusted by clamping a part of the flexible conduit 2 near the proximal end of the flexible conduit 2 by a pipe clamping device in a manner of enabling a section of the traction rope 1 from the part connected with the traction wheel 3 to reach a preset tension degree, and then adjusting the tension degree of the traction rope 1 in a manner of separating or approaching the flexible conduit 2 relative to the traction wheel 3, and adjusting the tension degree of the traction rope 1 by hooking or pressing the proximal end of the flexible conduit 2 towards the inner wall of the handle shell 6.
A step of fixing at least a part of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6 so that a section of the pulling rope 1 from the location of connection with the pulling wheel 3 to the proximal end of the flexible catheter 2 is maintained at a predetermined tension. In this step, the manner of maintaining the tension of the pulling rope 1 from the portion connected to the pulling wheel 3 to the proximal end of the flexible catheter 2 is related to the manner of adjusting the tension, for example, if the tension is adjusted by the tube gripping device, the position of the tube gripping device is maintained to maintain the tension of the pulling rope 1, and if the tension is adjusted by pressing the flexible catheter 2 down toward the inner wall of the handle housing 6, the pressing down of the flexible catheter 2 is maintained to maintain the tension of the pulling rope 1.
Generally, the endoscope is assembled by disengaging the handle housing 6, inserting the pull cord 1 into the flexible catheter 2 if a portion of the flexible catheter 2 is positioned in the insertion portion, integrating the insertion portion with the pull cord 1 and the flexible catheter 2, and then connecting and fixing the proximal end of the pull cord 1 to the traction wheel 3. If the flexible catheter 2 is entirely located within the handle housing 6, a generally integrated structure of the insertion portion and the pull cord 1 is obtained, and then the flexible catheter 2 is sleeved on the pull cord 1, and the proximal end of the pull cord 1 is connected to the traction wheel 3 for fixation. After the insertion part and the traction wheel 3 connected by the traction rope 1 are obtained, they are mounted on the handle housing 6.
In the case of this method, the flexible catheter 2 which is fitted over the traction rope 1 is used in the adjustment of the tension of the traction rope 1.
Since the tube diameter of the flexible conduit 2 used to provide protection and guidance for the pull-cord 1 is quite close to the diameter of the pull-cord 1 and the flexible conduit 2 can be seen as not being compressible along the axis, the trend of the flexible conduit 2, i.e. the trend of the pull-cord 1 in the flexible conduit 2, the length of the pull-cord 1 in the flexible conduit 2 is equal to the length of the flexible conduit 2.
Since the distal end of the flexible catheter 2 or the portion of the passive bending section 4 penetrating the insertion portion is fixed relative to the handle housing 6, the degree of bending of the proximal end of the flexible catheter 2 to the section distal to the handle housing 6 can be varied by adjusting the distance of the proximal end of the flexible catheter 2 relative to the traction wheel 3.
Since the traction wheel 3 and the active bending section 5 are fixed relative to the connected handle housing 6, the length of the traction cable 1 inside the handle housing 6 is determined, and thus the degree of bending of the corresponding cable section of the traction cable 1 in the flexible catheter 2 is synchronously changed during the adjustment of the distance of the proximal end of the flexible catheter 2 relative to the traction wheel 3.
Thus, by adjusting the distance of the proximal end of the flexible catheter 2 relative to the traction wheel 3, the center of gravity of the traction rope 1 located inside the handle housing 6 can be moved closer to or farther from the traction wheel 3 as a whole, thereby adjusting the degree of tension on the traction rope 1 from the traction wheel 3 to the proximal end of the flexible catheter 2. Under the condition of ensuring the integrity of the traction rope 1, the tensioning degree of the traction rope 1 can be very conveniently and rapidly adjusted in the assembly process, so that a section from the part connected with the traction wheel 3 on the traction rope 1 to the proximal end of the flexible catheter 2 reaches the preset tensioning degree. In addition, in the handle housing 6, there is no need to add an additional slack adjustment mechanism to adjust the tension of the traction rope 1, a larger space can be left in the handle housing 6 to facilitate arrangement and adjustment of the components, or the handle housing 6 can be made more compact.
According to some alternative embodiments, in the step of fixing at least part of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6 such that a section of the pull cord 1 from the location of connection with the pull wheel 3 to the proximal end of the flexible catheter 2 is maintained at a preset tension, an adhesive is added between the handle housing 6 and the flexible catheter 2 to adhesively fix at least part of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6.
In some cases, referring to fig. 4, a glue joint is selected on the tube section of the flexible catheter 2 inside the handle housing 6 for glue-fastening with the handle housing 6. Specifically, in the step of fixing at least a portion of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6 such that a section of the pulling rope 1 from the portion connected to the pulling wheel 3 to the proximal end of the flexible catheter 2 is maintained at a predetermined tension, a first fixing portion of the flexible catheter 2 is moved into a first wire groove 61 provided on the inner wall of the handle housing 6, and then a first adhesive 7 is added between the first wire groove 61 and the first fixing portion of the flexible catheter 2 to adhesively fix at least a portion of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6.
In some cases, referring to fig. 5, two glue sites are selected on the tube section of the flexible catheter 2 inside the handle housing 6 for glue fixation with the handle housing 6, one glue site being a first fixation site and the other glue site being a second fixation site, the second fixation site being closer to the distal end of the flexible catheter 2 than the first fixation site. Specifically, in the step of fixing at least a part of the tube section of the flexible catheter 2 located inside the handle housing 6 to the handle housing 6 such that a section of the pulling rope 1 from the portion connected with the pulling wheel 3 to the proximal end of the flexible catheter 2 is maintained at a predetermined tension, the first fixing portion and the second fixing portion of the flexible catheter 2 are moved into the first wire groove 61 and the second wire groove 62 provided on the inner wall of the handle housing 6, and then the first adhesive 7 and the second adhesive 8 are respectively added between the first wire groove 61 and the first fixing portion of the flexible catheter 2 and between the second wire groove 62 and the second fixing portion of the flexible catheter 2 to fix the part of the tube section of the flexible catheter 2 located inside the handle housing 6 to the handle housing 6.
Wherein the selected second fixation site on the flexible catheter 2 may also be replaced with a third fixation site located closer to the proximal end of the flexible catheter 2 than the first fixation site. In the step of fixing at least a part of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6 so that a section of the pulling rope 1 from the portion connected with the pulling wheel 3 to the proximal end of the flexible catheter 2 is maintained at a preset tension, the first fixing portion and the third fixing portion of the flexible catheter 2 are moved into the first wire groove 61 and the third wire groove 63 provided on the inner wall of the handle housing 6, and then the first adhesive 7 and the third adhesive 9 are respectively added between the first wire groove 61 and the first fixing portion of the flexible catheter 2 and between the third wire groove 63 and the third fixing portion of the flexible catheter 2 to adhesively fix the part of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6.
In some cases, referring to fig. 2 and 7, three glue sites are selected on the tube section of the flexible catheter 2 inside the handle housing 6 for glue fixation with the handle housing 6, one glue site being a first fixation site, one glue site being a second fixation site, and the other glue site being a third fixation site, the second fixation site being closer to the distal end of the flexible catheter 2 than the first fixation site, and the first fixation site being located between the second fixation site and the third fixation site. Specifically, in the step of fixing at least a part of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6 such that a section of the pulling rope 1 from the portion connected to the pulling wheel 3 to the proximal end of the flexible catheter 2 is maintained at a predetermined tension, the first fixing portion, the second fixing portion, and the third fixing portion of the flexible catheter 2 are moved into the first wire groove 61, the second wire groove 62, and the third wire groove 63 provided on the inner wall of the handle housing 6, and then the first adhesive 7, the second adhesive 8, and the third adhesive 9 are respectively added between the first wire groove 61 and the first fixing portion of the flexible catheter 2, the second wire groove 62 and the second fixing portion of the flexible catheter 2, and the third wire groove 63 and the third fixing portion of the flexible catheter 2 to adhesively fix a part of the tube section of the flexible catheter 2 inside the handle housing 6 to the handle housing 6.
In this embodiment, the traction rope 1 with the tensioning degree adjusted by the adhesive is beneficial in that a screw hole for screwing the stud is not needed or a buckle for installing the compression bar is not needed, and only a simple structure capable of receiving the adhesive is needed, so that the structure on the handle shell 6 for fixing the flexible catheter 2 is simpler, and the process for fixing the flexible catheter 2 is simpler and more convenient.
In the case where the first fixing portion and the second fixing portion are selected simultaneously on the tube section on the flexible catheter 2 located inside the handle housing 6, in the step of adding an adhesive between the handle housing 6 and the flexible catheter 2 to adhesively fix at least a portion of the tube section of the flexible catheter 2 located inside the handle housing 6 to the handle housing 6, while maintaining a section of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 at a predetermined degree of tension, a first adhesive 7 is added at the first wire groove 61 to adhesively fix the first fixing portion on the flexible catheter 2 to the first wire groove 61, a second adhesive 8 is added at the second wire groove 62 to adhesively fix the second fixing portion on the flexible catheter 2 to the handle housing 6 after the first adhesive 7 is cured, the second adhesive 8 is waited for curing to strengthen the adhesive strength between the flexible catheter 2 and the handle housing 6,
In the case where the first fixing portion and the third fixing portion are selected simultaneously on the tube section on the flexible catheter 2 inside the handle housing 6, in the step of adding an adhesive between the handle housing 6 and the flexible catheter 2 to adhesively fix at least a portion of the tube section of the flexible catheter 2 on the inside of the handle housing 6 to the handle housing 6, while maintaining a section of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 at a predetermined degree of tension, a first adhesive 7 is added at the first wire groove 61 to adhesively fix the first fixing portion on the flexible catheter 2 to the first wire groove 61, and after the first adhesive 7 is cured, a third adhesive 9 is added at the third wire groove 63 while maintaining a section of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 at a predetermined degree of tension, and the third adhesive 9 is waited for curing to strengthen the adhesive strength between the flexible catheter 2 and the handle housing 6. If the length of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 cannot be maintained at the preset tension before the third adhesive 9 is added at the third wire groove 63, the distance between the proximal end of the flexible catheter 2 and the traction wheel 3 is adjusted so that the length of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 is restored to the preset tension, and the third adhesive 9 is added at the third wire groove 63 while the length of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 is maintained at the preset tension, so that the third fixed portion of the flexible catheter 2 is adhesively fixed to the handle housing 6, and the third adhesive 9 is waited for curing to strengthen the adhesive strength between the flexible catheter 2 and the handle housing 6.
In the case where the first fixing portion and the third fixing portion are selected simultaneously on the tube section on the inner side of the handle housing 6 on the flexible catheter 2, when the third fixing portion, which is closer to the proximal end of the flexible catheter 2 with respect to the first fixing portion, is fixed to the handle housing 6, it is possible to allow the tensioning degree of the section of the traction rope 1 from the portion connected with the traction wheel 3 to the proximal end of the flexible catheter 2 to be finely adjusted again, so that the section of the traction rope 1 from the portion connected with the traction wheel 3 to the proximal end of the flexible catheter 2 can be adjusted more accurately to a preset tensioning degree. Thus, the precision requirement for fixing the first fixing part on the flexible catheter 2 can be reduced, the subsequent calibration is reserved, and the tensioning degree of the traction rope 1 is adjusted more conveniently and rapidly.
In the case where the first fixing portion, the second fixing portion and the third fixing portion are simultaneously selected on the tube section of the flexible catheter 2 located inside the handle housing 6, the first fixing portion should be first adhesively fixed to the first wire groove 61, and then the second fixing portion should be adhesively fixed to the second wire groove 62 or the third fixing portion should be adhesively fixed to the third wire groove 63. The sequence of the gluing of the second fixing part and the third fixing part is not specified.
According to some alternative embodiments, the curing time of the first adhesive 7 is shorter than the curing time of the second adhesive 8 and the third adhesive 9, and/or the curing strength of the first adhesive is lower than the curing strength of the second adhesive and the third adhesive, and/or the curing hardness of the first adhesive is lower than the curing hardness of the second adhesive and the third adhesive. In particular, the first adhesive 7, the second adhesive 8 and the third adhesive 9 may be UV adhesives to fix different portions of the flexible catheter 2 to the handle housing 6 in a short time. Of course, the first adhesive 7, the second adhesive 8 and the third adhesive 9 may be different types of adhesives.
Preferably, in the case that the flexible catheter 2 is selected to have only the first fixing portion and the second fixing portion, the curing hardness of the first adhesive 7 may be so soft that, before the second adhesive 8 is added, the length of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 is not maintained at a predetermined tension, a force may be applied to the portion of the tube section of the flexible catheter 2 located on the inner side of the handle housing 6, which is closer to the distal end than the second fixing portion, and the flexible catheter 2 is pulled to adjust the distance of the proximal end of the flexible catheter 2 with respect to the traction wheel 3 in such a manner that the cured first adhesive 7 is forced to be structurally deformed, so that the length of the traction rope 1 from the portion connected to the traction wheel 3 to the proximal end of the flexible catheter 2 is restored to the predetermined tension, and then the second adhesive 8 is added to fix the second fixing portion of the flexible catheter 2 to the handle housing 6. In this way, when the tension of the section of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible catheter 2 is not greatly different from the preset tension, the tension of the traction rope 1 can be forcibly adjusted to make up without damaging the connection relation between the first fixed part of the flexible catheter 2 and the handle shell 6.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.

Claims (10)

1. The traction rope installation method is characterized by comprising the following steps of: applied to an endoscope, comprising:
a step of sleeving the flexible catheter (2) on the traction rope (1) at a position between the proximal end and the distal end;
A step of connecting the proximal and distal ends of the continuous traction rope (1) to the distal ends of the traction wheel (3) and the active bending section (5) of the insertion portion, respectively;
A step of fixing the distal end of the flexible catheter (2) to the proximal end of the passive bending section (4) of the insertion portion or the active bending section (5) of the insertion portion or the handle housing (6);
a step of mounting the traction wheel (3) and the insertion portion to the handle housing (6);
A step of fixing the traction wheel (3) and the active bending section (5) of the insertion part relative to the connected handle shell (6), and adjusting the distance between the proximal end of the flexible catheter (2) and the traction wheel (3) so that a section between the part connected with the traction wheel (3) and the proximal end of the flexible catheter (2) on the traction rope (1) penetrating through the flexible catheter (2) reaches a preset tensioning degree;
And (3) fixing at least part of the tube section of the flexible catheter (2) positioned inside the handle housing (6) to the handle housing (6) so that a section of the traction rope (1) from a position connected with the traction wheel (3) to the proximal end of the flexible catheter (2) is maintained at a preset tension.
2. A traction rope installation method according to claim 1, characterized in that: the step of fixing at least part of the tube section of the flexible catheter (2) inside the handle housing (6) to the handle housing (6) such that a section of the pull cord (1) from the location of connection with the pull wheel (3) to the proximal end of the flexible catheter (2) is maintained at a predetermined tension level comprises:
An adhesive is added between the handle housing (6) and the flexible conduit (2) to adhesively secure at least a portion of the tube section of the flexible conduit (2) inside the handle housing (6) to the handle housing (6).
3. A traction rope installation method according to claim 2, characterized in that: adding an adhesive between the handle housing (6) and the flexible conduit (2) to adhesively secure at least a portion of a tube segment of the flexible conduit (2) located inside the handle housing (6) to the handle housing (6) includes:
Under the condition that a section of the traction rope (1) from a part connected with the traction wheel (3) to the proximal end of the flexible catheter (2) is maintained at a preset tensioning degree, adding a first adhesive (7) to fix a first fixed part on the flexible catheter (2) and the handle shell (6) in a cementing manner;
after the first adhesive (7) is cured, a second adhesive (8) is added to adhesively fix a second fixing location on the flexible catheter (2) to the handle housing (6) to strengthen the adhesive bond strength between the flexible catheter (2) and the handle housing (6), wherein the second fixing location is closer to the distal end of the flexible catheter (2) than the first fixing location.
4. A traction rope installation method according to claim 3, characterized in that: adding an adhesive between the handle housing (6) and the flexible conduit (2) to adhesively secure at least a portion of a tube segment of the flexible conduit (2) located inside the handle housing (6) to the handle housing (6) further comprises:
after the first adhesive (7) is cured, a third adhesive (9) is added to fix a third fixing part of the flexible catheter (2) closer to the proximal end of the flexible catheter (2) than the first fixing part to the handle shell (6) in a state of maintaining a section of the traction rope (1) from the part connected with the traction wheel (3) to the proximal end of the flexible catheter (2) at a preset tensioning degree, so as to strengthen the adhesive strength between the flexible catheter (2) and the handle shell (6).
5. The method of installing a traction rope according to claim 4, wherein: the curing time of the first adhesive is shorter than the curing time of the second adhesive and the third adhesive, and/or the curing strength of the first adhesive is lower than the curing strength of the second adhesive and the third adhesive, and/or the curing hardness of the first adhesive is lower than the curing hardness of the second adhesive and the third adhesive.
6. The method of installing a traction rope according to claim 4, wherein: after the first adhesive (7) is cured, while maintaining a section of the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible catheter (2) at a predetermined tension, adding a third adhesive (9) to adhesively fix a third fixing portion of the flexible catheter (2) closer to the proximal end of the flexible catheter (2) than the first fixing portion to the handle housing (6) to strengthen the adhesive strength between the flexible catheter (2) and the handle housing (6) includes:
If the length of the traction rope (1) from the part connected with the traction wheel (3) to the proximal end of the flexible catheter (2) is not maintained under the condition of the preset tensioning degree before the third adhesive (9) is added, the distance between the proximal end of the flexible catheter (2) and the traction wheel (3) is adjusted so that the length of the traction rope (1) from the part connected with the traction wheel (3) to the proximal end of the flexible catheter (2) is restored to the preset tensioning degree, and then the third adhesive (9) is added.
7. An endoscope, characterized in that: the traction device comprises a traction rope (1), a flexible catheter (2), a traction wheel (3), an insertion part and a handle shell (6), wherein the insertion part comprises a passive bending section (4) and an active bending section (5) which are sequentially connected; the traction wheel (3) and the passive bending section (4) of the insertion part are respectively arranged on the handle shell (6); the proximal end and the distal end of the traction rope (1) are respectively connected with the traction wheel (3) and the distal end of the active bending section (5); the flexible catheter (2) is sleeved on the traction rope (1), and the distal end of the flexible catheter (2) is fixed at the proximal end of the passive bending section (4) or the active bending section (5) or the handle shell (6);
At least part of the tube section of the flexible conduit (2) located inside the handle housing (6) is fixed to the handle housing (6) such that the distance of the proximal end of the flexible conduit (2) relative to the traction wheel (3) is fixed such that a section of the traction rope (1) from the location of connection with the traction wheel (3) to the proximal end of the flexible conduit (2) is maintained at a preset degree of tension.
8. An endoscope as defined in claim 7, wherein: at least part of the tube section of the flexible conduit (2) positioned at the inner side of the handle shell (6) is fixedly bonded with the handle shell (6) by adding an adhesive.
9. An endoscope as defined in claim 8, wherein: the pipe section on the inner side of the handle shell (6) of the flexible catheter (2) is provided with a first fixing part, a second fixing part and a third fixing part, the second fixing part and the third fixing part are respectively closer to the far end and the near end of the flexible catheter (2) than the first fixing part, and the first fixing part, the second fixing part and the third fixing part are fixed with the handle shell (6) in a cementing way through a first adhesive (7), a second adhesive (8) and a third adhesive (9) which are respectively added.
10. An endoscope as defined in claim 9, wherein: the first adhesive (7) has a lower cure hardness and a lower cure strength than the second adhesive (8) and/or the third adhesive (9);
and/or the number of the groups of groups,
The curing time of the first adhesive (7) is shorter than the curing time of the second adhesive (8) and the third adhesive (9);
and/or the number of the groups of groups,
The inner wall of the handle shell (6) is provided with a first wire groove (61), a second wire groove (62) and a third wire groove (63), the first fixed part, the second fixed part and the third fixed part are respectively accommodated in the first wire groove (61), the second wire groove (62) and the third wire groove (63), the first adhesive (7) is filled in the first wire groove (61) and covers the first fixed part, the second adhesive (8) is filled in the second wire groove (62) and covers the second fixed part, and the third adhesive (9) is filled in the third wire groove (63) and covers the third fixed part;
and/or the number of the groups of groups,
The pipe section of the flexible catheter (2) positioned at the inner side of the handle shell (6) is also provided with a fourth fixed part, the fourth fixed part is closer to the proximal end of the flexible catheter (2) than the third fixed part, and a fourth wire slot (64) capable of accommodating the fourth fixed part is formed in the inner wall of the handle shell (6);
and/or the number of the groups of groups,
The inner wall of the handle shell (6) is provided with a first containing cavity (65) with an open top between the first fixing part and the second fixing part, a second containing cavity (66) with an open top between the first fixing part and the third fixing part, and the flexible catheter (2) sequentially spans from the top openings of the first containing cavity (65) and the second containing cavity (66).
CN202410433385.4A 2024-04-11 Traction rope installation method and endoscope Active CN118021244B (en)

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Application Number Priority Date Filing Date Title
CN202410433385.4A CN118021244B (en) 2024-04-11 Traction rope installation method and endoscope

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CN118021244B CN118021244B (en) 2024-07-02

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003010107A (en) * 2002-06-12 2003-01-14 Olympus Optical Co Ltd Endoscope
CN102271572A (en) * 2008-12-10 2011-12-07 阿姆布股份有限公司 Endoscope bending section control mechanism
CN107049209A (en) * 2017-06-12 2017-08-18 上海成运医疗器械股份有限公司 Endoscope handle portion with angle control function
CN107529947A (en) * 2015-11-17 2018-01-02 奥林巴斯株式会社 Endoscope
US20230108741A1 (en) * 2021-10-04 2023-04-06 Olympus Medical Systems Corp. Insertion device and operation portion unit
CN219962822U (en) * 2022-12-15 2023-11-07 上海逸思医疗科技股份有限公司 Endoscope structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003010107A (en) * 2002-06-12 2003-01-14 Olympus Optical Co Ltd Endoscope
CN102271572A (en) * 2008-12-10 2011-12-07 阿姆布股份有限公司 Endoscope bending section control mechanism
CN107529947A (en) * 2015-11-17 2018-01-02 奥林巴斯株式会社 Endoscope
CN107049209A (en) * 2017-06-12 2017-08-18 上海成运医疗器械股份有限公司 Endoscope handle portion with angle control function
US20230108741A1 (en) * 2021-10-04 2023-04-06 Olympus Medical Systems Corp. Insertion device and operation portion unit
CN219962822U (en) * 2022-12-15 2023-11-07 上海逸思医疗科技股份有限公司 Endoscope structure

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