Front end shell assembly, insertion portion and endoscope

Abstract

The present invention provides a front end shell assembly, an insertion part and an endoscope, belonging to the technical field of endoscopes. The front end shell assembly includes a front end shell, an airbag and a connecting tube; the front end shell has an instrument channel, and the instrument channel is used for optical fiber to pass through; the airbag is installed in the instrument channel, and the connecting tube is connected to the airbag, and the connecting tube is used to transport a filling medium into the airbag to expand the airbag, and the airbag in the expanded state can push the optical fiber passing through the instrument channel to move. By setting the airbag, the present invention can use the expansion of the airbag to push the optical fiber passing through the instrument channel to move, adjust the position of the optical fiber in the instrument channel, so that the optical fiber can be roughly coaxial with the instrument channel, which is convenient for the operator to judge the direction of the optical fiber, and also convenient for the operator to judge the distance of the optical fiber extending out of the instrument channel, thereby judging the distance between the optical fiber and the target object, reducing or even avoiding the influence of unclear optical fiber position information on the doctor's intraoperative operation, and ensuring the smooth progress of the operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of endoscopes, and in particular relates to a front end shell component, an insertion part and an endoscope. Background Art

[0002] Laser lithotripsy is a minimally invasive surgery mainly used to treat urinary stones, such as kidney stones, ureteral stones and bladder stones. This technology is widely used in clinical practice due to its high safety, low trauma and fast recovery.

[0003] Holmium laser lithotripsy is an advanced laser lithotripsy technique. The energy of holmium laser can vaporize the water between the end of the optical fiber and the stone, forming tiny cavitation bubbles, and transfer energy to the stone, crushing the stone into powder. Because water absorbs a lot of energy, it reduces damage to surrounding tissues. At the same time, the penetration depth of holmium laser into human tissue is very shallow, so the damage to surrounding tissues can be minimized during lithotripsy, and it is extremely safe.

[0004] However, in actual use, after the holmium laser fiber passes through the instrument channel, the direction of the holmium laser fiber is uncertain, and it is difficult for doctors to judge the direction of the holmium laser fiber, which affects the doctor's intraoperative operation and even affects the results of the operation. Summary of the invention

[0005] The purpose of the present application is to provide a front end shell assembly, an insertion portion and an endoscope to solve the above-mentioned technical problems existing in the prior art.

[0006] This application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application provides a front end shell assembly, which is applied to an endoscope, and includes a front end shell, an airbag, and a connecting tube; the front end shell has an instrument channel, and the instrument channel is used for optical fiber to pass through; the airbag is installed in the instrument channel, and the connecting tube is connected to the airbag, and the connecting tube is used to transport a filling medium into the airbag to expand the airbag. The airbag in the expanded state can push the optical fiber passing through the instrument channel to move, so that the optical fiber can be coaxial with the instrument channel.

[0008] In a second aspect, an embodiment of the present application provides an insertion portion, comprising a front end shell assembly provided in the embodiment of the first aspect.

[0009] In a third aspect, an embodiment of the present application provides an endoscope, comprising the insertion portion provided by the embodiment of the second aspect.

[0010] The technical solution adopted in this application can achieve the following beneficial effects:

[0011] In the present application, an airbag is provided and the expansion of the airbag is utilized to push the optical fiber inserted into the instrument channel to move and adjust the position of the optical fiber in the instrument channel, so that the optical fiber can be roughly coaxial with the instrument channel, which makes it easier for the operator to judge the direction of the optical fiber and the distance of the optical fiber extending out of the instrument channel, thereby judging the distance between the optical fiber and the target object, reducing or even avoiding the influence of unclear optical fiber position information on the doctor's intraoperative operation, and ensuring the smooth progress of the operation; and, because the optical fiber can be roughly coaxial with the instrument channel and the direction of the optical fiber is clear, the operator can combine the size of the optical fiber and the distance information between the optical fiber and the target object to roughly judge the size of the stone when the optical fiber contacts the stone, which makes it easier for the operator to determine the treatment method for the stone. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 1 ;

[0014] Figure 2 is a cross-sectional view of a front end shell assembly provided in some embodiments of the present application Figure 1 ;

[0015] Figure 3 is a cross-sectional view of a front end shell assembly provided in some embodiments of the present application Figure 2 ;

[0016] Figure 4 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 2 ;

[0017] Figure 5 is a cross-sectional view of a front end shell assembly provided in some embodiments of the present application Figure 3 ;

[0018] Figure 6 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 3 ;

[0019] Figure 7 is a cross-sectional view of a front end shell assembly provided in some embodiments of the present application Figure 4 ;

[0020] Figure 8This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 4 ;

[0021] Fig. 9 This is a schematic diagram of the structure of the endoscope provided in some embodiments of the present application. Figure 1 ;

[0022] Fig.10 This is a schematic diagram of the structure of the endoscope provided in some embodiments of the present application. Figure 2 ;

[0023] Fig.11 It is a schematic diagram of the structure of the syringe and the control valve provided in some embodiments of the present application.

[0024] In the figure: 100 - front end shell, 110 - instrument channel, 200 - air bag, 300 - connecting tube, 400 - control valve, 500 - syringe, 600 - instrument tube, 700 - handle, 800 - optical fiber. DETAILED DESCRIPTION

[0025] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0026] In each embodiment of the present application, "proximal end" and "distal end" refer to the end of the endoscope and its accessories that are closer to the user in the use environment as the "proximal end" and the end that is farther from the user as the "distal end", where the "distal end" and "proximal end" also correspond to the front and back relationships respectively.

[0027] In the related art, since the holmium laser fiber is thin and its diameter is too different from that of the instrument tube of the endoscope insertion part, when the holmium laser fiber shuttles through the instrument tube, the fiber will touch the inner wall of the instrument tube multiple times, causing the fiber to bend in an uncertain direction inside the instrument tube, resulting in the fiber pointing in an uncertain direction after passing through the instrument channel.

[0028] The direction of the optical fiber is uncertain, and it is difficult for doctors to determine the direction of the optical fiber during the stone removal operation. For example, the optical fiber may point to the stone removal basket, causing the basket connection wire of the stone removal basket to be broken; or the optical fiber deviates from the stone and points to the inner wall of the tissue, causing damage to the inner wall of the tissue; or the optical fiber advances too far, causing excessive squeezing between the optical fiber and the stone, resulting in damage to the optical fiber, or the optical fiber pushes the stone to move, causing the stone to move to a position that is difficult to operate, or the optical fiber pushes the stone to squeeze the inner wall of the tissue, damaging the inner wall of the tissue.

[0029] In view of this, the present application embodiment provides a front end shell assembly, which is applied to an endoscope, referring to Figures 1 to 8As shown, the front end shell 100 assembly includes three parts: the front end shell 100, the airbag 200 and the connecting pipe 300.

[0030] The front end housing 100 is located at the far end of the insertion part. In some embodiments, a camera module installation position and a light source installation position are also provided on the front end housing 100. The camera module installation position is used to install the camera module, which can obtain image information at the far end of the front end housing 100. The light source installation position is used to install a light source, which is used to provide illumination light to provide a clearer field of view for the operator.

[0031] The front end shell 100 has an instrument channel 110, which runs through both axial ends of the front end shell 100. The instrument channel 110 is used for various instruments to pass through, such as a stone removal basket, an optical fiber 800 and other instruments.

[0032] The tube section of the endoscope used to insert into the human body is generally referred to as the insertion portion, which includes a curved tube that can adapt to the curved cavity of the human body. An instrument tube 600 is disposed in the curved tube, and a front end shell 100 of the instrument tube 600 is disposed at the distal end of the curved tube. In some embodiments, the instrument tube 600 can extend from the curved tube to the instrument channel 110 in the front end shell 100, which can be referred to Figure 2 , Figure 5 as well as Figure 7 In other embodiments, the instrument tube 600 does not extend into the front end housing 100, and the instrument tube 600 is directly connected to the instrument channel 110 of the front end housing 100. Figure 3 As shown, the instrument tube 600 is not disposed in the instrument channel 110 .

[0033] The airbag 200 is installed in the instrument channel 110, and the connecting tube 300 is in communication with the airbag 200, and the connecting tube 300 is used to transport a filling medium into the airbag 200 to expand the airbag 200. The airbag 200 is located in the instrument channel 110, and the airbag 200 in an expanded state can contact the optical fiber 800 passing through the instrument channel 110, thereby pushing the optical fiber 800 to move, adjusting the position of the optical fiber 800 in the instrument channel 110, so that the optical fiber 800 can be coaxial with the instrument channel 110.

[0034] In actual use, the end of the connecting tube 300 away from the airbag 200 is usually arranged at the handle 700 of the endoscope, so that the operator can control the connecting tube 300. The medium transported by the connecting tube 300 into the airbag 200 can be a gas medium or a liquid medium, and both media can flow, thereby increasing the internal pressure of the airbag 200 and expanding the airbag 200. The connecting tube 300 can be arranged in the instrument channel 110, or directly arranged in the front end shell 100, or arranged outside the front end shell 100.

[0035] The airbag 200 is installed in the instrument channel 110. After the filling medium enters the airbag 200, the airbag 200 tends to expand toward the side with less pressure. Therefore, one side of the airbag 200 is the shell of the front end shell 100, and the other side is the instrument channel 110. Relative to the shell of the front end shell 100, the airbag 200 will expand toward the instrument channel 110, occupy the space in the instrument channel 110, and reduce the space of the instrument channel 110 around the optical fiber 800, thereby squeezing the optical fiber 800, or straightening the optical fiber 800 to adjust the position of the optical fiber 800.

[0036] The operator controls the expansion degree of the airbag 200 to adjust the degree of adjustment of the airbag 200 to the position of the optical fiber 800, so as to adjust the optical fiber 800 to a preset position. The operator can adjust the optical fiber 800 to a position roughly coaxial with the instrument channel 110, which is more convenient for the operator to determine the direction of the optical fiber 800; the optical fiber 800 can also be adjusted to other parts of the instrument channel 110 according to actual needs.

[0037] Adjusting the optical fiber 800 to a position roughly coaxial with the instrument channel 110 facilitates the operator to determine the direction of the optical fiber 800, so that the optical fiber 800 can accurately point to the location of the stone and treat the stone, avoiding the normal operation being affected by the wrong judgment of the position of the optical fiber 800. In addition, since the optical fiber 800 is roughly coaxial with the instrument channel 110, the direction of the optical fiber 800 is relatively clear, and the operator can determine the distance of the optical fiber 800 extending out of the instrument channel 110 based on the image information obtained by the camera module, thereby determining the distance between the optical fiber 800 and the target object. Combined with the size information of the optical fiber 800, when the optical fiber 800 contacts the stone, the operator can roughly determine the size of the stone, so that the operator can formulate a more appropriate treatment method based on the size of the stone.

[0038] After the airbag 200 is inflated, it can not only push the optical fiber 800 to move, but also adjust the position of the optical fiber 800. In addition, since the size of the instrument channel 110 is fixed, the moving distance of the optical fiber 800 in the instrument channel 110 is limited. Therefore, after the airbag 200 is inflated to a certain extent, the optical fiber 800 cannot continue to move due to the limitation of the instrument channel 110. At this time, the airbag 200 fixes the optical fiber 800 in the instrument channel 110, stabilizes the position of the optical fiber 800, and is more convenient for the doctor's intraoperative operation.

[0039] There are many ways to arrange the airbag 200 in the instrument channel 110. It should be noted that when the instrument tube 600 is arranged in the instrument channel 110, the instrument tube 600 needs to avoid the airbag 200 so that the airbag 200 in the expanded state can contact the optical fiber 800 passing through the instrument tube 600.

[0040] The airbag 200 can be completely disposed inside the instrument channel 110, and the inflated airbag 200 is also completely inside the instrument channel 110. Due to the space limitation of the instrument channel 110, the airbag 200 can be inflated more quickly to abut against the inner wall of the instrument channel 110, thereby fixing the optical fiber 800 inside the instrument channel 110.

[0041] In other embodiments, the airbag 200 may be disposed at the distal end of the instrument channel 110, as shown in FIG. Figures 1 to 8 As shown. The airbag 200 is located at the distal end of the instrument channel 110. When the airbag 200 is expanded, it can expand toward the outside of the instrument channel 110. The airbag 200 can contact the part of the optical fiber 800 located outside the instrument channel 110. The closer the airbag 200 is to the distal end of the optical fiber 800, the better the position stabilization effect of the optical fiber 800, the more accurate the directivity of the optical fiber 800, and the more accurate the doctor's intraoperative operation.

[0042] In some embodiments, the inflated balloon 200 may be completely outside the instrument channel 110. The more the inflated balloon 200 is outside the instrument channel 110, the closer the contact position between the balloon 200 and the optical fiber 800 is to the distal end of the optical fiber 800, and the better the position stabilization effect of the optical fiber 800.

[0043] The distal end of the instrument channel 110 may be provided with a mounting groove, which is communicated with the instrument channel 110 and passes through the distal end surface of the front end shell 100 , and the airbag 200 is mounted in the mounting groove. Alternatively, the airbag 200 may be directly fixed to the inner wall of the instrument channel 110 .

[0044] In some embodiments, at least part of the inflated airbag 200 is located in the instrument channel 110. The size of the instrument channel 110 is fixed. The airbag 200 is located in the instrument channel 110. When the inflated airbag 200 is pressed against the inner wall of the instrument channel 110, the position of the airbag 200 in the instrument channel 110 is stable, and the airbag 200 has a better fixing effect on the optical fiber 800. In addition, since the instrument channel 110 can restrict the airbag 200, it can be prevented from inflating the airbag 200 at will, resulting in the inflated airbag 200 being unable to push the optical fiber 800 to move, or being unable to push the optical fiber 800 to move in a preset direction.

[0045] The airbag 200 in the expanded state can fix the relative position of the optical fiber 800 and the instrument channel 110. In a specific implementation, the airbag 200 can wrap the optical fiber 800, and the airbag 200 and the inner wall of the instrument channel 110 are pressed tightly, thereby fixing the position of the optical fiber 800 and the instrument channel 110. Alternatively, the airbag 200 directly presses the optical fiber 800 against the inner wall of the instrument channel 110, thereby fixing the position of the optical fiber 800.

[0046] Since the airbag 200 has a certain elasticity, the inflated airbag 200 contacts the optical fiber 800 without causing any damage to the structure of the optical fiber 800; moreover, the airbag 200 has a squeezing effect on the optical fiber 800, which increases the contact area between the airbag 200 and the optical fiber 800, thereby improving the fixing stability of the airbag 200 on the optical fiber 800.

[0047] In some embodiments of the present application, the airbag 200 is configured as an annular structure, and the airbag 200 is coaxially arranged with the instrument channel 110. Figures 1 to 5 As shown in FIG. 1 , the optical fiber 800 passes through the instrument channel 110 and the airbag 200 at the same time. During the expansion process of the airbag 200, the airbag 200 expands simultaneously in the circumferential direction of the instrument channel 110, thereby clamping the optical fiber 800 in the middle. Figure 4 and Figure 5 As shown. Since the airbag 200 is coaxially arranged with the instrument channel 110, the inflated airbag 200 can clamp the optical fiber 800 at the center, so that the optical fiber 800 is as coaxial as possible with the instrument channel 110. Further preferably, the structure of the airbag 200 is balanced in its circumferential direction, so as to ensure that the airbag 200 is evenly expanded toward its axial position during the expansion process, thereby improving the coaxiality between the optical fiber 800 and the instrument channel 110.

[0048] The airbag 200 is configured as a ring structure, and the operator only needs to control the filling medium to be filled into the airbag 200 during use, which is convenient and quick to operate. Figure 4 and Figure 5 As shown, since the airbag 200 is disposed at the distal end of the instrument channel 110 , a portion of the inflated airbag 200 is located outside the instrument channel 110 , thereby improving the fixing stability of the optical fiber 800 .

[0049] In other embodiments of the present application, the front end shell 100 assembly may be provided with at least two air bags 200, referring to Figures 6 to 8 As shown, all the airbags 200 are distributed along the circumference of the instrument channel 110, and each airbag 200 is connected to a connecting tube 300, which can input a filling medium into the airbag 200, so that each airbag 200 can be expanded.

[0050] The airbags 200 are arranged separately from each other, and the position of the optical fiber 800 can be adjusted by controlling the expansion degree of different airbags 200 so that the optical fiber 800 is coaxial with the instrument channel 110, or the optical fiber 800 is controlled to move toward the inner wall of the instrument channel 110 so that the optical fiber 800 deviates from the axis of the instrument channel 110, and the position of the optical fiber 800 can be fine-tuned so that the optical fiber 800 can act on a specific position on the stone.

[0051] The connecting tube 300 connected to the airbag 200 may be the same connecting tube 300 , or may be connected to different connecting tubes 300 , so as to control the airbag 200 to be at different expansion degrees.

[0052] In some embodiments of the present application, among all the airbags 200, there are two airbags 200 distributed along the radial direction of the instrument channel 110. In the case where there are two or more airbags 200, two airbags 200 are arranged opposite to each other. Figures 6 to 8 In the embodiment, two airbags 200 are provided. The two airbags 200 are respectively located at the radial ends of the instrument channel 110. The two airbags 200 have the same force to adjust the position of the optical fiber 800, which is more convenient for the operator to adjust the position of the optical fiber 800. In addition, the operator does not need to distinguish the two airbags 200 during the adjustment process. Under this structure, an additional airbag 200 can be provided to control the optical fiber 800 to deviate in a preset direction. The adjustment of the position of the optical fiber 800 is more flexible. In addition, the three airbags 200 squeeze the optical fiber 800 together, and the position of the optical fiber 800 is more stable.

[0053] In other embodiments of the present application, all the airbags 200 can be arranged to be evenly distributed along the circumference of the instrument channel 110. In the case where the front end shell 100 is provided with two, three or more airbags 200, the airbags 200 are evenly distributed. The more airbags 200 there are, the more directions the optical fiber 800 can move when adjusting the optical fiber 800, and the higher the flexibility of adjustment. It should be noted that the multiple airbags 200 need to be located on the same circumference of the instrument channel 110. After the airbags 200 are inflated, the circumferential forces on the optical fiber 800 are in the same plane, so as to avoid the situation where the circumferential forces on the optical fiber 800 are not in the same plane, and the optical fiber 800 is bent and damaged.

[0054] In the case where two or more airbags 200 are provided, any airbag 200 can press the optical fiber 800 against the inner wall of the instrument channel 110 after expansion. Figure 8 As shown, Figure 8 In the embodiment, only one airbag 200 is inflated, and the other airbag 200 is not inflated. The expansion of a single airbag 200 can also fix the position of the optical fiber 800 in the instrument channel 110, and the position adjustment of the optical fiber 800 is more flexible, and at the same time, it is more convenient for the operator to operate.

[0055] In some specific embodiments, the front end housing 100 assembly further includes a control valve 400, which is connected to all the connecting tubes 300 and is used to control the flow or cutoff of the filling medium in the connecting tubes 300. The filling medium flows in the connecting tubes 300 and can flow into the airbag 200, so that the airbag 200 expands. If the filling medium is cut off in the connecting tubes 300, the filling medium cannot flow into the airbag 200, and the airbag 200 cannot expand.

[0056] The airbag 200 is inflated or not by setting the control valve 400. Fig.10 As shown, the control valve 400 is generally arranged at one end of the connecting pipe 300 near the handle 700 for easy operation. There can be a one-to-one correspondence between the connecting pipe 300 and the control valve 400, or two or more connecting pipes 300 can be connected to the same control valve 400, and multiple connecting pipes 300 can be controlled simultaneously by one control valve 400.

[0057] refer to Fig.11 As shown, the two connecting pipes 300 are connected to the same control valve 400. By rotating the control valve 400, either one of the two connecting pipes 300 can be connected, or both connecting pipes 300 can be connected at the same time, and the control is performed according to actual needs.

[0058] In some embodiments of the present application, the front end housing 100 assembly further includes a syringe 500, referring to Fig. 9 and Fig.10 As shown, the syringe 500 is installed at one end of the connecting tube 300 away from the airbag 200, and the syringe 500 is connected to the connecting tube 300, and the syringe 500 is used to inject the filling medium into the connecting tube 300. The syringe 500 is directly installed at the handle 700 of the endoscope, which is convenient for the operator to operate the syringe 500. The syringe 500 is pre-assembled to the handle 700 of the endoscope in advance, and the filling medium is filled inside the syringe 500 for subsequent use. In addition, the syringe 500 can also control the filling medium to flow back into the syringe 500, so that the airbag 200 in the expanded state gradually shrinks, the airbag 200 withdraws from the instrument channel 110, other instruments can be inserted into the instrument channel 110 for use, and the optical fiber 800 can be moved again. By operating the syringe 500, the position of the optical fiber 800 can be repeatedly adjusted.

[0059] In some embodiments of the present application, the airbag 200 is installed at the distal end of the instrument channel 110, and the radial dimension of the portion of the instrument channel 110 for installing the airbag 200 gradually increases from the proximal end of the front end shell 100 to the distal end of the front end shell 100. The airbag 200 is installed in the instrument channel 110, and in the radial direction of the instrument channel 110, one side of the airbag 200 is the shell of the front end shell 100, and the other side is the space of the instrument channel 110. When the filling medium is input into the airbag 200, due to the shell limitation of the front end shell 100, in the radial direction of the instrument channel 110, the airbag 200 will expand toward the side where the instrument channel 110 is located.

[0060] In the axial direction of the instrument channel 110, the larger the diameter of the instrument channel 110, the smaller the restriction on the airbag 200, and the airbag 200 is more likely to expand toward the larger diameter portion of the instrument channel 110. The closer to the distal end, the larger the diameter of the instrument channel 110, so the airbag 200 is more likely to expand toward the distal end of the instrument channel 110, thereby increasing the volume of the airbag 200 outside the front end housing 100, and further improving the stability of the airbag 200 fixing the optical fiber 800.

[0061] The embodiment of the present application also provides an insertion portion, including the front end shell 100 assembly provided in any of the above embodiments.

[0062] The present application also provides an endoscope, including the insertion portion provided by any of the above embodiments, with reference to Fig. 9 and Fig.10 The endoscope provided in the embodiment of the present application may be a pyeloscope, or a bronchoscope, a suction endoscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A front end housing assembly, applied to an endoscope, characterized in that: It comprises a front end shell (100), an air bag (200) and a connecting pipe (300); The front end housing (100) has an instrument channel (110), and the instrument channel (110) is used for allowing the optical fiber (800) to pass through; The airbag (200) is installed in the instrument channel (110), the connecting tube (300) is in communication with the airbag (200), and the connecting tube (300) is used to transport a filling medium into the airbag (200) so as to expand the airbag (200). The airbag (200) in the expanded state can push the optical fiber (800) passing through the instrument channel (110) to move so that the optical fiber (800) can be coaxial with the instrument channel (110); The airbag (200) is located at the distal end of the instrument channel (110); And / or, at least a portion of the inflated airbag (200) is located within the instrument channel (110).

2. A front end housing assembly according to claim 1, characterized in that: The airbag (200) is an annular structure, and the airbag (200) is coaxially arranged with the instrument channel (110).

3. A front end housing assembly according to claim 1, characterized in that: The front end shell (100) component has at least two airbags (200), all of the airbags (200) are distributed along the circumference of the instrument channel (110), and any of the airbags (200) is connected to the connecting tube (300).

4. A front end housing assembly according to claim 3, characterized in that: All the airbags (200) include two airbags (200) distributed radially along the instrument channel (110); And / or, any of the airbags (200) can press the optical fiber (800) against the inner wall of the instrument channel (110) after expansion.

5. A front end housing assembly according to claim 3, characterized in that: The front end housing (100) assembly further comprises a control valve (400), wherein the control valve (400) is connected to all the connecting pipes (300), and the control valve (400) is used to control the flow or cutoff of the filling medium in the connecting pipes (300).

6. A front end housing assembly according to claim 1, characterized in that: The front end shell (100) assembly further comprises a syringe (500), the syringe (500) being mounted on an end of the connecting tube (300) away from the airbag (200), and the syringe (500) being in communication with the connecting tube (300), and the syringe (500) being used to inject the filling medium into the connecting tube (300).

7. A front end housing assembly according to claim 1, characterized in that: Along the direction from the proximal end of the front end shell (100) to the distal end of the front end shell (100), the radial dimension corresponding to the portion of the instrument channel (110) used to install the airbag (200) gradually increases.

8. An insertion portion, characterized in that: Comprising the front end shell assembly according to any one of claims 1-7.

9. An endoscope, characterized in that: It comprises the insertion part as claimed in claim 8.

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