Traction rope mounting method and endoscope

Abstract

The present invention provides a traction rope mounting method and an endoscope, relates to the technical field of endoscopes, and solves the problem that it is inconvenient to adjust the degree of tension of existing traction ropes. The traction rope mounting method of the present invention applies to the endoscope. When a traction wheel and an active bending section of an insertion part are fixed, the distance between the near end of a flexible catheter relative to the traction wheel is adjusted to allow the section of the traction rope that penetrates through the flexible catheter between the part connected to the traction wheel and the near end of the flexible catheter to reach a preset degree of tension, and at least part of the pipe section of the flexible catheter located on the inner side of a handle housing is then fixed to the handle housing to maintain the section of the traction rope between the part connected to the traction wheel and the near end of the flexible catheter at the preset degree of tension. The method utilizes a flexible catheter that sleeves a traction rope and whose far end is fixed relative to a handle housing or an insertion part, so that the degree of tension of the traction rope can be conveniently and rapidly adjusted in the case that the traction rope is intact.

Description

Traction rope installation method and endoscope TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, in particular to a traction rope installation method and endoscope. BACKGROUND

[0002] The working principle of the existing endoscope is to insert the insertion part into the human body through the natural cavity or the artificially constructed cavity of the human body for examination or treatment. After the endoscope is inserted into the human body, the camera module provides diagnostic information for the doctor, and if necessary, a treatment instrument can be inserted into the endoscope to complete sampling or treatment of the lesion site, or a negative pressure source can be attached to collect tissue samples from the lesion site. The above operations need to adjust the pointing direction of the distal assembly at any time, so that the camera module and the instrument tube nozzle are aligned with each other at each position of the lesion site.

[0003] Adjusting the pointing direction of the distal assembly needs to rotate the traction wheel by manual force to pull the two traction ropes respectively to transmit the deflection power to the distal assembly, so that the distal assembly changes the pointing direction.

[0004] Due to manufacturing errors and assembly errors, the installed traction rope may not reach the specified tension, which will cause the pointing adjustment of the distal assembly to be delayed in response and not in place. Therefore, a tension adjustment mechanism is added to the middle part of the traction rope in the related art to adjust the tension of the traction rope afterwards, such as breaking the middle part of the traction rope, exposing the two breakpoint parts outside the flexible catheter, and respectively installing them on the threaded tube and threaded column that are screwed to each other. When it is found that the tension of the installed traction rope does not meet the standard, the distance between the two breakpoints can be adjusted by rotating the threaded tube or the threaded column, so as to change the length of the traction rope to adjust the tension of the traction rope.

[0005] The way of adjusting the tension of the traction rope by setting the tension adjustment mechanism in the related art has the problem of inconvenient traction rope tension adjustment. SUMMARY

[0006] The purpose of the present application is to provide a traction rope installation method and endoscope to solve the problem of inconvenient traction rope tension adjustment.

[0007] The present application is achieved by the following technical solutions:

[0008] The present application provides a traction rope installation method applied to an endoscope, comprising:

[0009] The step of sleeving the flexible catheter to the part between the proximal end and the distal end of the traction rope;

[0010] connecting the proximal end and the distal end of the traction rope to the traction wheel and the distal end of the active bending section of the insertion part, respectively;

[0011] fixing the distal end of the flexible tube to the passive bending section of the insertion part or the proximal end of the active bending section of the insertion part or the handle housing;

[0012] mounting the traction wheel and the insertion part to the handle housing;

[0013] fixing the traction wheel and the active bending section of the insertion part relative to the connected handle housing and adjusting the distance of the proximal end of the flexible tube relative to the traction wheel so that a section of the traction rope from the connection with the traction wheel to the proximal end of the flexible tube reaches a preset tensioning degree;

[0014] fixing at least a part of the tube section of the flexible tube inside the handle housing to the handle housing so that the section of the traction rope from the connection with the traction wheel to the proximal end of the flexible tube is maintained at the preset tensioning degree.

[0015] The present application provides an endoscope, which comprises a traction rope, a flexible tube, a traction wheel, an insertion part and a handle housing, wherein the insertion part comprises a passive bending section and an active bending section connected in sequence; the traction wheel and the passive bending section of the insertion part are mounted to the handle housing, respectively; the proximal end and the distal end of the traction rope are connected to the traction wheel and the distal end of the active bending section, respectively; the flexible tube is sleeved on the traction rope, and the distal end of the flexible tube is fixed to the passive bending section or the proximal end of the active bending section or the handle housing; at least a part of the tube section of the flexible tube inside the handle housing is fixed to the handle housing so that the distance of the proximal end of the flexible tube relative to the traction wheel is fixed, and so that the section of the traction rope from the connection with the traction wheel to the proximal end of the flexible tube is maintained at a preset tensioning degree.

[0016] The present application has the following advantages and beneficial effects:

[0017] In the present application, the distal end of the flexible tube sleeved on the traction rope is fixed to the proximal end of the passive bending section or the active bending section or the handle housing, and at least a part of the tube section inside the handle housing is fixed to the handle housing, which makes the flexible tube provide a determined path for the traction rope inside the handle housing. In this structure, during the assembly of the traction rope with the sleeved flexible tube, the tensioning degree of the traction rope can be adjusted by adjusting the bending degree of the flexible tube, which makes the adjustment of the tensioning degree of the traction rope more convenient.

[0018] In the process of adjusting the tension of the traction rope, a flexible conduit is used, which is sleeved outside the traction rope. Since the diameter of the flexible conduit used for protecting and guiding the traction rope is very close to the diameter of the traction rope, and the flexible conduit can be regarded as unable to be compressed along the axis, the path of the flexible conduit, i.e. the path of the traction rope in the flexible conduit, is equal to the length of the flexible conduit. Since the distal end of the flexible conduit or the part of the passive bending section penetrating into the insertion part is fixed relative to the handle shell, by adjusting the distance between the proximal end of the flexible conduit and the traction wheel, the bending degree of the part of the flexible conduit from the proximal end to the distal end of the handle shell can be changed. Since the traction wheel and the active bending section are fixed relative to the connected handle shell, the length of the traction rope inside the handle shell is determined, and therefore, in the process of adjusting the distance between the proximal end of the flexible conduit and the traction wheel, the bending degree of the corresponding rope section in the flexible conduit will change synchronously. In this way, by adjusting the distance between the proximal end of the flexible conduit and the traction wheel, the center of gravity of the traction rope inside the handle shell can be moved closer to or farther away from the traction wheel, so as to adjust the tension of the part of the traction rope from the traction wheel to the proximal end of the flexible conduit. The tension of the traction rope can be adjusted quickly and conveniently during assembly under the condition that the traction rope is intact, and the part of the traction rope from the part connected with the traction wheel to the proximal end of the flexible conduit can reach the preset tension. In addition, in the handle shell, no additional tension adjusting mechanism is needed to adjust the tension of the traction rope, and more space can be left in the handle shell to facilitate the arrangement and adjustment of components, or the handle shell can be designed to be more compact. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] FIG. 1 shows the structure inside the handle shell of the endoscope from a first perspective;

[0021] FIG. 2 is an enlarged view of part A in FIG. 1;

[0022] FIG. 3 shows the structure of the part shown in FIG. 2 when the flexible conduit is not connected with the handle shell;

[0023] FIG. 4 shows the structure of the part shown in FIG. 2 when the first fixed part of the flexible conduit is connected with the handle shell;

[0024] Figure 5 shows the structure of the flexible catheter shown in Figure 2 when the first and second fixed positions are connected to the handle shell;

[0025] Figure 6 shows the internal structure of the handle shell of the endoscope from a second perspective;

[0026] Figure 7 is an enlarged view of part B in Figure 6;

[0027] Figure 8 shows the internal structure of the handle shell;

[0028] Figure 9 is an enlarged view of part C in Figure 8.

[0029] The reference signs in the figures are:

[0030] 1, traction cord; 2, flexible catheter; 3, traction wheel; 4, passive bending section; 5, active bending section;

[0031] 6, handle shell; 61, first wire slot; 62, second wire slot; 63, third wire slot; 64, fourth wire slot; 65, first cavity; 66, second cavity; 67, third cavity; 6a, side plate; 6b, partition plate;

[0032] 7, first adhesive; 8, second adhesive; 9, third adhesive. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0034] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. The specific meaning of the above terms in the present application can be understood by the person skilled in the art according to the specific circumstances.

[0036] The inventor found in the research that the way of adjusting the tension of the traction rope by setting the tension adjusting mechanism in the related art not only has the problem that the tension adjusting process of the traction rope is inconvenient, but also has the problem of complex structure, which makes the increased tension adjusting mechanism occupy the internal arrangement space of the operation part, causes the condition that the pipeline arrangement is difficult, and also causes the condition that the handle size is too large.

[0037] On the one hand, the present application provides an endoscope, as shown in FIGS. 1-9, which is specially designed as follows:

[0038] In this embodiment, the endoscope, as shown in FIG. 1, includes a handle shell 6, a traction wheel 3, an insertion part, a traction rope 1 and a flexible catheter 2, the insertion part includes a passive bending section 4 and an active bending section 5 connected in sequence, in the figure, half of the handle shell 6 is removed to show the internal structure of the handle shell 6, and the endoscope with the half handle shell 6 is shown.

[0039] The traction wheel 3 is rotatably mounted on the handle shell 6 near the proximal end, and the passive bending section 4 of the insertion part is mounted on the distal end of the handle shell 6.

[0040] Part of the traction rope 1 is accommodated in the handle shell 6, and the other part passes into the insertion part from the distal end of the handle shell 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.

[0041] The traction rope 1 adopts different numbers, such as 2 or 4, according to the direction of the active bending section 5 of the insertion part that needs to be adjusted. One or two traction wheels 3 are provided according to the number of the traction rope 1, and two traction ropes 1 are fixed on one traction wheel 3 to control the reciprocating adjustment of the active bending section 5 in one direction.

[0042] A flexible catheter 2 is sleeved on each traction rope 1, and according to the different lengths of the flexible catheter 2, part of the flexible catheter 2 can pass into the insertion part from the distal end of the handle shell 6 in the handle shell 6, so that the distal end is fixed to the proximal end of the passive bending section 4 or the active bending section 5, or the flexible catheter 2 can be located in the handle shell 6 as a whole, so that the distal end is fixed to the handle shell 6.

[0043] The tube diameter of the flexible conduit 2 is close to the diameter of the traction rope 1, so that only one traction rope 1 can pass through the flexible conduit 2, and the traction rope 1 is well guided and protected.

[0044] The flexible conduit 2 is basically a tube that cannot be compressed along the axis, and can also be a tube that cannot or is difficult to be stretched along the axis, and can be a spring tube or a braided tube or a whole round tube that can be stretched along the axis, and the material can be metal or plastic.

[0045] At least part of the tube segment of the flexible conduit 2 inside the handle shell 6 is fixed to the handle shell 6 in a certain form, and the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 is fixed, which determines the direction of the traction rope 1 arranged in the flexible conduit 2 and the concentration of the slack part of the traction rope 1 at a certain position from the proximal end to the distal end of the flexible conduit 2 inside the handle shell 6, so that a section of the traction rope 1 from the part connected to the traction wheel 3 to the proximal end of the flexible conduit 2 is in a taut state and maintained at a predetermined tension, and the traction wheel 3 and the active bending segment 5 of the insertion part have a good follow-up, which can accurately control the bending of the active bending segment 5 by rotating the lever, so as to accurately adjust the direction of the distal end assembly installed at the distal end of the active bending segment 5.

[0046] The predetermined tension can be a certain point value or a range value. For example, the predetermined tension can be the elastic force generated by the traction rope 1 when the traction wheel 3 is not rotated. It should be noted that when the traction rope 1 is in tension, the traction rope 1 will be subjected to a certain tension, and the traction rope 1 will generate an elastic force equal to the tension. Therefore, in some embodiments, the above method can be used to make the traction rope generate a predetermined elastic force after installation, so that the traction wheel 3 and the active bending segment have good follow-up.

[0047] In the embodiment, the flexible conduit 2 sleeved on the traction rope 1 of the endoscope cannot be compressed along the axis, and the distal end of the flexible conduit 2 is fixed to the proximal end of the passive bending segment 4 or the active bending segment 5 or the handle shell 6, and at least part of the tube segment inside the handle shell 6 is fixed to the handle shell 6, which makes the flexible conduit 2 provide a certain direction for the traction rope 1 inside the handle shell 6. In this structure, during the assembly of the traction rope 1 sleeved with the flexible conduit 2, the tension of the section of the traction rope 1 from the part connected to the traction wheel 3 to the proximal end of the flexible conduit 2 can be adjusted by adjusting the bending degree of the flexible conduit 2, which makes the adjustment of the tension of the traction rope 1 more convenient.

[0048] According to some optional embodiments, the part of the tube segment of the flexible conduit 2 inside the handle shell 6 is fixed between the handle shell 6 by adding adhesive.

[0049] The glue joint between the flexible conduit 2 and the handle shell 6 can be one as shown in Fig. 4, two as shown in Fig. 5, three as shown in Fig. 2, and so on. If there are multiple glue joints between the flexible conduit 2 and the handle shell 6, the glue joints are arranged in sequence along the axis direction of the flexible conduit 2.

[0050] For example, as shown in Fig. 4, the glue joint between the flexible conduit 2 and the handle shell 6 is provided as one, and a first adhesive 7 is added between the first fixed position on the flexible conduit 2 and the handle shell 6, and after the first adhesive 7 is cured, the first fixed position on the flexible conduit 2 and the handle shell 6 are fixed.

[0051] For example, as shown in Fig. 5, the glue joint between the flexible conduit 2 and the handle shell 6 is provided as two, i.e. the first fixed position and the second fixed position, and the second fixed position is closer to the distal end of the flexible conduit 2 than the first fixed position. When fixing the flexible conduit 2 and the handle shell 6, a first adhesive 7 is first added between the first fixed position on the flexible conduit 2 and the handle shell 6, and after the first adhesive 7 is cured, the first fixed position on the flexible conduit 2 and the handle shell 6 are fixed. Then, a second adhesive 8 is added between the second fixed position on the flexible conduit 2 and the handle shell 6, and after the second adhesive 8 is cured, the second fixed position on the flexible conduit 2 and the handle shell 6 are fixed. Of course, the glue joint between the flexible conduit 2 and the handle shell 6 can also be only two, i.e. the first fixed position and the third fixed position which is closer to the proximal end of the flexible conduit 2 than the first fixed position, as shown in Fig. 2. In this case, after the first fixed position on the flexible conduit 2 and the handle shell 6 are glued and fixed, a third adhesive 9 is added between the third fixed position on the flexible conduit 2 and the handle shell 6, and after the third adhesive 9 is cured, the third fixed position on the flexible conduit 2 and the handle shell 6 are fixed.

[0052] For example, as shown in Fig. 2 and Fig. 7, the glue joint between the flexible conduit 2 and the handle shell 6 is provided as three, wherein the second fixed position and the third fixed position are closer to the distal end and the proximal end of the flexible conduit 2 than the first fixed position, respectively. When fixing the flexible conduit 2 and the handle shell 6, a first adhesive 7 is first added between the first fixed position on the flexible conduit 2 and the handle shell 6, and after the first adhesive 7 is cured, the first fixed position on the flexible conduit 2 and the handle shell 6 are fixed. Then, according to the needs, it can be chosen whether to first add a second adhesive 8 between the second fixed position on the flexible conduit 2 and the handle shell 6, and after the second adhesive 8 is cured, the second fixed position on the flexible conduit 2 and the handle shell 6 are fixed, or to first add a third adhesive 9 between the third fixed position on the flexible conduit 2 and the handle shell 6, and after the third adhesive 9 is cured, the third fixed position on the flexible conduit 2 and the handle shell 6 are fixed.

[0053] Before the first fixing position is fixed on the flexible conduit 2, 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 conduit 2 needs to be adjusted in advance, and after the first fixing position is fixed on the handle shell 6, the section of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible conduit 2 can be maintained at the preset tension.

[0054] In the embodiment, after the flexible conduit 2 is fixed on the handle shell 6 through the first fixing position, the flexible conduit 2 is fixed on the handle shell 6 through the second fixing position or the third fixing position, which can improve the stability of the bending degree of the flexible conduit 2 and enable the flexible conduit 2 to provide stable guidance for the traction rope 1. After the flexible conduit 2 is fixed on the handle shell 6 through the first fixing position, the position of the proximal end of the flexible conduit 2 may change excessively due to some reasons in the operation process, which causes the section of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible conduit 2 not to be maintained at the preset tension. When the flexible conduit 2 has the third fixing position closer to the proximal end of the flexible conduit 2 than the first fixing position, the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 can be adjusted again to maintain the section of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible conduit 2 at the preset tension, and the deflection of the distal end assembly of the insertion part is more rapid and accurate. In the case where the first fixing position and the second fixing position exist on the flexible conduit 2 at the same time, the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 can be preliminarily adjusted, the first fixing position is fixed on the handle shell 6, and then the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 is finely adjusted, and finally the third fixing position is fixed on the handle shell 6. In this way, the tension of the traction rope 1 can be better ensured while the installation speed of the flexible conduit 2 is improved through twice adjustment.

[0055] According to some optional embodiments, the curing hardness and the curing strength of the first adhesive 7 are less than the curing hardness and the curing strength of the second adhesive 8 and / or the third adhesive 9. After the first fixing position of the flexible conduit 2 is fixed on the handle shell 6, the position of the flexible conduit 2 can be more easily adjusted by pulling or the like, the reinforcing effect on the flexible conduit 2 can be ensured, or the fixed first adhesive 7 can be more easily damaged to remove the flexible conduit 2 from the handle shell 6 and fix it again.

[0056] The curing time of the first adhesive 7 is shorter than the curing time of the second adhesive 8 and the third adhesive 9, so that the preliminarily adjusted flexible conduit 2 can be fixed more quickly. When the tension of the traction rope 1 does not reach the preset tension, fine adjustment can be performed subsequently, so that the flexible conduit 2 can be more conveniently and quickly fixed on the handle shell 6 and the tension of the traction rope 1 can be adjusted.

[0057] At least one of the first adhesive 7, the second adhesive 8 and the third adhesive 9 is UV adhesive, and the second adhesive 8 and the third adhesive 9 can be the same or different.

[0058] According to some optional embodiments, as shown in FIG. 9, a wire slot for accommodating the flexible catheter 2 is arranged on the inner wall of the handle shell 6, so that the fixed positions on the flexible catheter 2 can be more easily and stably fixed on the handle shell 6.

[0059] In some cases, as shown in FIGS. 2 and 9, such as the case where the flexible catheter 2 is provided with three adhesive positions of the first fixed position, the second fixed position and the third fixed position, the inner wall of the handle shell 6 is correspondingly provided with three wire slots for accommodating the first fixed position, the second fixed position and the third fixed position. The three wire slots include the third wire slot 63, the first wire slot 61 and the second wire slot 62 arranged in sequence along the axis of the flexible catheter 2 from the proximal end to the distal end.

[0060] The first wire slot 61, the second wire slot 62 and the third wire slot 63 are respectively formed at the top ends of the three partitions 6b erected on the inner wall of the handle shell 6, so that the flexible catheter 2 is lifted away from the inner wall of the handle shell 6.

[0061] The first fixed position, the second fixed position and the third fixed position of the flexible catheter 2 are respectively accommodated in the first wire slot 61, the second wire slot 62 and the third wire slot 63, and it is preferable that a plurality of flexible catheters 2 are accommodated side by side in the first wire slot 61, the second wire slot 62 and the third wire slot 63. The first adhesive 7 is filled in the first wire slot 61 and covers the first fixed position of the flexible catheter 2, the second adhesive 8 is filled in the second wire slot 62 and covers the second fixed position of the flexible catheter 2, and the third adhesive 9 is filled in the third wire slot 63 and covers the third fixed position of the flexible catheter 2. The flexible catheter 2 is fixed to the handle shell 6 at the three positions by the way of point gluing.

[0062] In this embodiment, the first wire slot 61, the second wire slot 62 and the third wire slot 63 are arranged at the top ends of the partitions 6b, which can provide three surfaces of the slot wall and the slot bottom, and also provide two plate surfaces of the partitions 6b, so as to increase the connection area with the adhesive, and the first fixed position, the second fixed position and the third fixed position on the flexible catheter 2 can be more stably fixed to the handle shell 6. The first wire slot 61, the second wire slot 62 and the third wire slot 63 can also better limit the position of the flexible catheter 2, so that the flexible catheter 2 can be more easily fixed to the handle shell 6 by the adhesive.

[0063] The third slot 63 and the first slot 61 should have a large enough distance so that after the first fixed position of the flexible conduit 2 is glued and fixed with the first slot 61, the tube segment of the flexible conduit 2 between the first slot 61 and the third slot 63 can be easily controlled to adjust the distance between the proximal end of the flexible conduit 2 and the traction wheel 3. For example, a press bar or a screw post can be inserted between the first slot 61 and the third slot 63 to press the tube segment of the flexible conduit 2 towards the inner wall of the handle shell 6 to adjust the distance between the proximal end of the flexible conduit 2 and the traction wheel 3.

[0064] According to some optional embodiments, as shown in FIG. 9, the tube segment of the flexible conduit 2 inside the handle shell 6 has a certain length between the first fixed position and the proximal end in addition to the first fixed position to reserve the fourth fixed position.

[0065] In some cases, the inner wall of the handle shell 6 is provided with a fourth slot 64 capable of accommodating the fourth fixed position. The fourth slot 64 is formed at the top end of a partition plate 6b erected on the inner wall of the handle shell 6. The fourth fixed position is a reserved fixed position. As shown in FIG. 2, in the assembled endoscope, the fourth fixed position of the flexible conduit 2 is not fixed with the fourth slot 64 and is in a free state, which can be outside the fourth slot 64. When the traction cord 1 is loose after the endoscope is used for a period of time, the handle shell 6 can be disassembled for self-adjustment or sent to the manufacturer for adjustment of the distance between the proximal end of the flexible conduit 2 and the traction wheel 3. The fourth fixed position is placed into the fourth slot 64 and fixed with the handle shell 6 by means of glueing to adjust the tension of the traction cord 1 again and prolong the service life of the endoscope.

[0066] Preferably, the flexible conduit 2 has the first fixed position, the second fixed position, the third fixed position and the fourth fixed position. The fourth fixed position is closer to the proximal end of the flexible conduit 2 than the third fixed position. In this way, when the traction cord 1 is loose during use, the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 can be adjusted, and the fourth fixed position is fixed with the handle shell 6 to adjust the tension of the traction cord 1 again and prolong the service life of the endoscope. In order to facilitate the user to adjust the tension of the traction cord 1 later, the distance between the fourth fixed position and the third fixed position is larger than the distance between the third fixed position and the first fixed position, so that the user can directly adjust the tension of the traction cord 1 by pressing the tube segment of the flexible conduit 2 between the fourth slot 64 and the third slot 63 with fingers. After the tension of the traction cord 1 is adjusted, the fourth fixed position of the flexible conduit 2 can be fixed with the fourth slot 64 in any feasible way. Of course, the fourth fixed position of the flexible conduit 2 can also be directly fixed with other positions on the handle shell 6 or components installed on the handle shell 6.

[0067] According to some optional embodiments, as shown in FIG. 2 and FIG. 9, the first, second and third fixed positions of the flexible conduit 2 are respectively accommodated in the middle points of the first, second and third wire slots 61, 62 and 63 on the top end of the partition plate 6b and fixed by glue, and the fourth fixed position of the flexible conduit 2 passes from the side of the fourth wire slot 64 on the top end of the partition plate 6b.

[0068] On the inner wall of the handle shell 6, a side plate 6a is arranged on each of the opposite sides of the four partition plates 6b, the side plates 6a sequentially connect the four partition plates 6b, forming a first cavity 65 with a top opening around the first and second fixed positions, a second cavity 66 with a top opening around the first and third fixed positions, and a third cavity 67 with a top opening around the third and fourth fixed positions, and the flexible conduit 2 is sequentially supported on the fourth wire slot 64, the third wire slot 63, the first wire slot 61 and the second wire slot 62 in the direction from the proximal end to the distal end along the axial direction and sequentially crosses the top openings of the third cavity 67, the second cavity 66 and the first cavity 65.

[0069] In this embodiment, the traction rope 1 sequentially crosses the top openings of the first, second and third cavities 65, 66 and 67, so that the adjustment of the tension degree of the traction rope 1 can be conveniently adjusted by pressing the flexible conduit 2 into the corresponding cavity. In addition, the first, second and third adhesives 7, 8 and 9 can also contact the inner side of the side plate 6a on both sides, increasing the bonding area.

[0070] On the other hand, the present application provides a traction rope installation method, which is applied to an endoscope, preferably to the endoscope in any of the above embodiments, for adjusting the tension degree of the traction rope.

[0071] The traction rope installation method comprises:

[0072] The step of sleeving the flexible conduit 2 on the part between the proximal end and the distal end of the traction rope 1.

[0073] The step of connecting the proximal end and the distal end of the traction rope 1 to the traction wheel 3 and the distal end of the active bending section 5 of the insertion part, respectively.

[0074] The step of fixing the distal end of the flexible conduit 2 to the passive bending section 4 of the insertion part or the proximal end of the active bending section 5 of the insertion part or the handle shell 6.

[0075] The step of installing the traction wheel 3 and the insertion part to the handle shell 6.

[0076] The traction wheel 3 and the active bending section 5 of the insertion part are fixed relative to the connected handle shell 6, and the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 is adjusted so that the section of the traction rope 1 from the connection with the traction wheel 3 to the proximal end of the flexible conduit 2 reaches a preset tensioning degree. In this step, the fixing of the traction wheel 3 and the active bending section 5 of the insertion part can be achieved by clamps, such as by clamping the two sides of the active bending section 5 in the bending direction so that the active bending section 5 cannot bend, and by clamping the traction wheel 3 and the outer wall of the handle shell 6 to prevent the traction wheel 3 from rotating when pulling the traction rope 1. The fixing of the traction wheel 3 can also be achieved by fixing the traction wheel shaft, etc. The way to make the section of the traction rope 1 from the connection with the traction wheel 3 to the proximal end of the flexible conduit 2 reach a preset tensioning degree can be achieved by clamping the flexible conduit 2 near its proximal end by a pipe clamping device, and then adjusting the tensioning degree of the traction rope 1 by moving away from or closer to the traction wheel 3, or by adjusting the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 by hooking or pressing the flexible conduit 2 towards the inner wall of the handle shell 6.

[0077] The at least part of the pipe section of the flexible conduit 2 inside the handle shell 6 is fixed to the handle shell 6 so that the section of the traction rope 1 from the connection with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at a preset tensioning degree. In this step, the way to maintain the tensioning degree of the section of the traction rope 1 from the connection with the traction wheel 3 to the proximal end of the flexible conduit 2 is related to the way to adjust the tensioning degree, such as if the tensioning degree is adjusted by a pipe clamping device, the position of the pipe clamping device is maintained to maintain the tensioning degree of the traction rope 1, or if the tensioning degree is adjusted by pressing the flexible conduit 2 towards the inner wall of the handle shell 6, the pressing degree of the flexible conduit 2 is maintained to maintain the tensioning degree of the traction rope 1.

[0078] Generally, the assembly process of the endoscope is generally to separate the handle shell 6, if part of the flexible conduit 2 is located in the insertion part, generally the traction rope 1 is inserted into the flexible conduit 2 first, the insertion part is integrated with the traction rope 1 and the flexible conduit 2, and then the proximal end of the traction rope 1 is connected and fixed with the traction wheel 3. If the entire flexible conduit 2 is located in the handle shell 6, generally the insertion part integrated with the traction rope 1 is obtained first, then the flexible conduit 2 is sleeved on the traction rope 1, and the proximal end of the traction rope 1 is connected to the traction wheel 3 for fixation. After obtaining the insertion part and the traction wheel 3 connected by the traction rope 1, they are installed on the handle shell 6.

[0079] In the case of using the method, the flexible conduit 2 sleeved outside the traction rope 1 is used in the adjustment of the tension of the traction rope 1.

[0080] Since the pipe diameter of the flexible conduit 2 used for protecting and guiding the traction rope 1 is very close to the diameter of the traction rope 1, and the flexible conduit 2 can be regarded as unable to be compressed along the axis, the trajectory of the flexible conduit 2, i.e. the trajectory of the traction rope 1 in the flexible conduit 2, and the length of the traction rope 1 in the flexible conduit 2 are equal to the length of the flexible conduit 2.

[0081] Since the distal end of the flexible conduit 2 or the part of the passive bending section 4 penetrating into the insertion part is fixed relative to the handle shell 6, by adjusting the distance between the proximal end of the flexible conduit 2 and the traction wheel 3, the bending degree of the part from the proximal end of the flexible conduit 2 to the distal end of the handle shell 6 can be changed.

[0082] Since the traction wheel 3 and the active bending section 5 are fixed relative to the connected handle shell 6, and the length of the traction rope 1 inside the handle shell 6 is determined, in the process of adjusting the distance between the proximal end of the flexible conduit 2 and the traction wheel 3, the bending degree of the corresponding rope section of the traction rope 1 in the flexible conduit 2 will be changed synchronously.

[0083] In this way, by adjusting the distance between the proximal end of the flexible conduit 2 and the traction wheel 3, the center of gravity of the traction rope 1 inside the handle shell 6 can be made to approach or move away from the traction wheel 3 as a whole, so as to adjust the tension of the part of the traction rope 1 from the traction wheel 3 to the proximal end of the flexible conduit 2. The tension of the traction rope 1 can be adjusted conveniently and quickly in the assembly process while ensuring the integrity of the traction rope 1, so that the part of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible conduit 2 reaches the preset tension. In addition, in the handle shell 6, no additional tension adjustment mechanism is needed to adjust the tension of the traction rope 1, so that more space can be left in the handle shell 6 to facilitate the arrangement and adjustment of components, or the handle shell 6 can be designed to be more compact.

[0084] According to some optional embodiments, in the step of fixing at least part of the pipe section of the flexible conduit 2 inside the handle shell 6 to the handle shell 6 so that the part of the traction rope 1 from the part connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tension, an adhesive is added between the handle shell 6 and the flexible conduit 2 to glue and fix at least part of the pipe section of the flexible conduit 2 inside the handle shell 6 to the handle shell 6.

[0085] In some cases, referring to FIG. 4, one adhesive site is selected on the pipe segment of the flexible conduit 2 inside the handle housing 6 for adhesive fixing with the handle housing 6. Specifically, in the step of fixing the at least partial pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6 so that the segment of the traction rope 1 from the site connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tensioning degree, the first fixing site of the flexible conduit 2 is moved into the first wire slot 61 provided on the inner wall of the handle housing 6, and then the first adhesive 7 is added between the first wire slot 61 and the first fixing site of the flexible conduit 2 to adhesively fix the at least partial pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6.

[0086] In some cases, referring to FIG. 5, two adhesive sites are selected on the pipe segment of the flexible conduit 2 inside the handle housing 6 for adhesive fixing with the handle housing 6, one adhesive site is the first fixing site, and the other adhesive site is the second fixing site, the second fixing site is closer to the distal end of the flexible conduit 2 than the first fixing site. Specifically, in the step of fixing the at least partial pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6 so that the segment of the traction rope 1 from the site connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tensioning degree, the first fixing site and the second fixing site of the flexible conduit 2 are moved into the first wire slot 61 and the second wire slot 62 provided on the inner wall of the handle housing 6, and then the first adhesive 7 and the second adhesive 8 are added between the first wire slot 61 and the first fixing site of the flexible conduit 2 and between the second wire slot 62 and the second fixing site of the flexible conduit 2, respectively, to adhesively fix the partial pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6.

[0087] In some cases, referring to FIG. 5, two adhesive sites are selected on the pipe segment of the flexible conduit 2 inside the handle housing 6 for adhesive fixing with the handle housing 6, one adhesive site is the first fixing site, and the other adhesive site is the second fixing site, the second fixing site is closer to the distal end of the flexible conduit 2 than the first fixing site. Specifically, in the step of fixing the at least partial pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6 so that the segment of the traction rope 1 from the site connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tensioning degree, the first fixing site and the second fixing site of the flexible conduit 2 are moved into the first wire slot 61 and the second wire slot 62 provided on the inner wall of the handle housing 6, and then the first adhesive 7 and the second adhesive 8 are added between the first wire slot 61 and the first fixing site of the flexible conduit 2 and between the second wire slot 62 and the second fixing site of the flexible conduit 2, respectively, to adhesively fix the partial pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6.

[0088] In some cases, referring to FIG. 2 and FIG. 7, three adhesive sites are selected on the pipe segment of the flexible conduit 2 inside the handle housing 6 for adhesive fixing with the handle housing 6, one of the adhesive sites is the first fixing site, one of the adhesive sites is the second fixing site, and the other one of the adhesive sites is the third fixing site, the second fixing site is closer to the distal end of the flexible conduit 2 than the first fixing site, and the first fixing site is between the second fixing site and the third fixing site. Specifically, in the step of fixing the at least part of the pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6 so that the section of the pulling rope 1 from the site connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tensioning degree, the first fixing site, the second fixing site, and the third fixing site of the flexible conduit 2 are moved into the first wire slot 61, the second wire slot 62, and the third wire slot 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 added between the first wire slot 61 and the first fixing site of the flexible conduit 2, between the second wire slot 62 and the second fixing site of the flexible conduit 2, and between the third wire slot 63 and the third fixing site of the flexible conduit 2, respectively, to adhesively fix the part of the pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6.

[0089] In the embodiment, the adhesive is used to fix the pulling rope 1 with the adjusted tensioning degree, which has the advantage that no screw hole for screwing the stud or buckle for installing the pressing rod is needed, only a simple structure capable of receiving the adhesive is needed, which can make the structure of the handle housing 6 for fixing the flexible conduit 2 simpler and the process of fixing the flexible conduit 2 more convenient.

[0090] In the case that the first fixing site and the second fixing site are simultaneously selected on the pipe segment of the flexible conduit 2 inside the handle housing 6, in the step of adding the adhesive between the handle housing 6 and the flexible conduit 2 to adhesively fix the at least part of the pipe segment of the flexible conduit 2 inside the handle housing 6 to the handle housing 6, in the case that the section of the pulling rope 1 from the site connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tensioning degree, the first adhesive 7 is added at the first wire slot 61 to adhesively fix the first fixing site of the flexible conduit 2 with the first wire slot 61, the second adhesive 8 is added at the second wire slot 62 to adhesively fix the second fixing site of the flexible conduit 2 with the handle housing 6 after the first adhesive 7 is solidified, and the second adhesive 8 is solidified to reinforce the adhesive strength between the flexible conduit 2 and the handle housing 6.

[0091] In the case that the first fixing position and the third fixing position are both selected on the pipe segment of the flexible conduit 2 inside the handle shell 6, in the step of adding adhesive between the handle shell 6 and the flexible conduit 2 to glue-fix at least the pipe segment of the flexible conduit 2 inside the handle shell 6 to the handle shell 6, in the case that the tension of the section of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tension, the first adhesive 7 is added at the first wire slot 61 to glue-fix the first fixing position on the flexible conduit 2 to the first wire slot 61, after the first adhesive 7 is cured, in the case that the tension of the section of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tension, the third adhesive 9 is added at the third wire slot 63 to glue-fix the third fixing position on the flexible conduit 2 to the handle shell 6, and the third adhesive 9 is waited to be cured to reinforce the glue-fixing strength between the flexible conduit 2 and the handle shell 6. If the tension of the section of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 cannot be maintained at the preset tension before the third adhesive 9 is added at the third wire slot 63, the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 is adjusted first so that the section of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 returns to the preset tension, and then the third adhesive 9 is added at the third wire slot 63 to glue-fix the third fixing position on the flexible conduit 2 to the handle shell 6 in the case that the tension of the section of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is maintained at the preset tension, and the third adhesive 9 is waited to be cured to reinforce the glue-fixing strength between the flexible conduit 2 and the handle shell 6.

[0092] In the case that the first fixing position and the third fixing position are both selected on the pipe segment of the flexible conduit 2 inside the handle shell 6, when the third fixing position closer to the proximal end of the flexible conduit 2 than the first fixing position is fixed to the handle shell 6, the tension of the section of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 can be adjusted again more accurately, and the section of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 can be adjusted to the preset tension more accurately. This can reduce the accuracy requirement for fixing the first fixing position on the flexible conduit 2, and leave the subsequent calibration, so that the tension adjustment of the traction rope 1 is more convenient and faster.

[0093] In the case that the first fixing position, the second fixing position and the third fixing position are simultaneously selected on the pipe segment of the flexible conduit 2 inside the handle shell 6, the first fixing position should be firstly glued and fixed with the first wire slot 61, and then the second fixing position is considered to be glued and fixed with the second wire slot 62 or the third fixing position is considered to be glued and fixed with the third wire slot 63. The sequence of gluing and fixing the second fixing position and the third fixing position is not specified.

[0094] According to some optional 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. Specifically, the first adhesive 7, the second adhesive 8 and the third adhesive 9 can all use UV glue, so as to fix different positions of the flexible conduit 2 with the handle shell 6 in a very short time. Of course, the first adhesive 7, the second adhesive 8 and the third adhesive 9 can also use different types of adhesives.

[0095] Preferably, in the case that the flexible conduit 2 only selects the first fixing position and the second fixing position, the curing hardness of the first adhesive 7 can be soft to a certain extent, so that before the second adhesive 8 is added, the force can be applied to the position of the pipe segment of the flexible conduit 2 inside the handle shell 6 which is closer to the distal end than the second fixing position, the flexible conduit 2 is pulled to adjust the distance between the proximal end of the flexible conduit 2 and the traction wheel 3 in the form of structural deformation of the cured first adhesive 7, so that the segment of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 returns to the preset tensioning degree, and then the second adhesive 8 is added to fix the second fixing position of the flexible conduit 2 with the handle shell 6. In this way, when the tensioning degree of the segment of the traction rope 1 from the position connected with the traction wheel 3 to the proximal end of the flexible conduit 2 is not much different from the preset tensioning degree, the tensioning degree of the traction rope 1 is forcibly adjusted to make up for the difference without destroying the connection between the first fixing position of the flexible conduit 2 and the handle shell 6.

[0096] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for installing a traction rope, characterized in that: Applications in endoscopy include: The step of sheathing the flexible catheter (2) onto the portion between the proximal end and the distal end of the traction rope (1); The steps of connecting the proximal end and the distal end of the continuous traction rope (1) to the traction wheel (3) and the distal end of the active bending section (5) of the insertion part respectively; The step of fixing the distal end of the flexible catheter (2) to the passive bending section (4) of the insertion part or the proximal end of the active bending section (5) of the insertion part or the handle housing (6); The step of installing the traction wheel (3) and the insert portion to the handle housing (6); The step of fixing the traction wheel (3) and the active bending section (5) of the insertion portion relative to the connected handle housing (6), and adjusting the distance between the proximal end of the flexible catheter (2) and the traction wheel (3) so that the section of the traction rope (1) passing through the flexible catheter (2) from the portion connected to the traction wheel (3) to the proximal end of the flexible catheter (2) reaches a preset tension level; The step of fixing at least a portion of the flexible conduit (2) located inside the handle housing (6) to the handle housing (6) so that a section of the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2) is maintained at a preset tension level; The proximal end of the flexible conduit (2) is located between the traction wheel (3) and the pipe section of the flexible conduit (2) fixed to the handle housing (6).

2. A traction rope installation method according to claim 1, characterized in that: The steps of fixing at least a portion of the flexible conduit (2) located inside the handle housing (6) to the handle housing (6) so that a section of the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2) is maintained at a preset tension level include: Adhesive is added between the handle housing (6) and the flexible conduit (2) to glue and fix at least a portion of the flexible conduit (2) located inside the handle housing (6) to the handle housing (6).

3. A traction rope installation method according to claim 2, characterized in that: Adding adhesive between the handle housing (6) and the flexible conduit (2) to glue and fix at least a portion of the flexible conduit (2) located inside the handle housing (6) to the handle housing (6) comprises: While maintaining a preset tension on the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2), a first adhesive (7) is added to glue and fix the first fixing portion on the flexible conduit (2) to the handle housing (6); After the first adhesive (7) is cured, a second adhesive (8) is added to glue and fix the second fixing portion on the flexible catheter (2) to the handle housing (6) to strengthen the bonding strength between the flexible catheter (2) and the handle housing (6), wherein the second fixing portion is closer to the distal end of the flexible catheter (2) than the first fixing portion.

4. A traction rope installation method according to claim 3, characterized in that: Adding adhesive between the handle housing (6) and the flexible conduit (2) to glue and fix at least a portion of the flexible conduit (2) located inside the handle housing (6) to the handle housing (6) also includes: After the first adhesive (7) is cured, while maintaining a preset tension on the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2), a third adhesive (9) is added to glue and fix a third fixing portion on the flexible conduit (2) that is closer to the proximal end of the flexible conduit (2) than the first fixing portion to the handle housing (6), so as to strengthen the bonding strength between the flexible conduit (2) and the handle housing (6).

5. A traction rope installation method according to claim 4, characterized in that: 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. A traction rope installation method according to claim 4, characterized in that: After the first adhesive (7) is cured, while maintaining a preset tension on the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2), a third adhesive (9) is added to glue and fix a third fixing portion on the flexible conduit (2) closer to the proximal end of the flexible conduit (2) than the first fixing portion to the handle housing (6), so as to strengthen the bonding strength between the flexible conduit (2) and the handle housing (6), including: If the section of the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2) is not maintained at the preset tension level before the third adhesive (9) is added, the distance of the proximal end of the flexible conduit (2) relative to the traction wheel (3) is first adjusted so that the section of the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2) is restored to the preset tension level, and then the third adhesive (9) is added.

7. An endoscope, characterized in that: The invention comprises a traction rope (1), a flexible catheter (2), a traction wheel (3), an insertion portion and a handle shell (6), wherein the insertion portion comprises a passive bending section (4) and an active bending section (5) connected in sequence; the traction wheel (3) and the passive bending section (4) of the insertion portion are respectively mounted on the handle shell (6); the proximal end and the distal end of the traction rope (1) are respectively connected to 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 to the proximal end of the passive bending section (4) or the active bending section (5) or the handle shell (6); At least a portion of the flexible conduit (2) located inside the handle housing (6) is fixed to the handle housing (6), so that the distance between the proximal end of the flexible conduit (2) and the traction wheel (3) is fixed, so that the section of the traction rope (1) from the portion connected to the traction wheel (3) to the proximal end of the flexible conduit (2) is maintained at a preset tension level; wherein the proximal end of the flexible conduit (2) is located between the traction wheel (3) and the section of the flexible conduit (2) fixed to the handle housing (6).

8. An endoscope according to claim 7, characterized in that: At least a portion of the flexible conduit (2) located inside the handle housing (6) is glued and fixed to the handle housing (6) by adding an adhesive.

9. An endoscope according to claim 8, characterized in that: The tube section on the flexible catheter (2) located inside the handle housing (6) has a first fixing portion, a second fixing portion, and a third fixing portion, wherein the second fixing portion and the third fixing portion are respectively closer to the distal end and the proximal end of the flexible catheter (2) than the first fixing portion, and the first fixing portion, the second fixing portion, and the third fixing portion are adhesively fixed to the handle housing (6) by respectively added first adhesive (7), second adhesive (8), and third adhesive (9).

10. An endoscope according to claim 9, characterized in that: The cured hardness and cured strength of the first adhesive (7) are smaller than the cured hardness and cured strength of the second adhesive (8) and / or the third adhesive (9); and / or 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 inner wall of the handle housing (6) is provided with a first wire groove (61), a second wire groove (62) and a third wire groove (63), the first fixing portion, the second fixing portion and the third fixing portion 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 fixing portion, the second adhesive (8) is filled in the second wire groove (62) and covers the second fixing portion, and the third adhesive (9) is filled in the third wire groove (63) and covers the third fixing portion; And / or, the tube section of the flexible conduit (2) located inside the handle housing (6) further comprises a fourth fixing portion, the fourth fixing portion being closer to the proximal end of the flexible conduit (2) than the third fixing portion, and the inner wall of the handle housing (6) is provided with a fourth wire groove (64) capable of accommodating the fourth fixing portion; And / or, the inner wall of the handle housing (6) is provided with a first cavity (65) with a top opening between the first fixing portion and the second fixing portion, and a second cavity (66) with a top opening is provided between the first fixing portion and the third fixing portion, and the flexible conduit (2) sequentially spans the top openings of the first cavity (65) and the second cavity (66).

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