Hysteroscope and multilayer rubber mat sealing structure thereof

Abstract

The utility model discloses a multilayer rubber mat sealing structure of a hysteroscope. The multilayer rubber mat sealing structure comprises a first rubber mat, a second rubber mat and a flexible connecting arm which can be bent and folded. A first avoiding groove is formed in the side wall of the first rubber mat, and a second avoiding groove is formed in the side wall of the second rubber mat; one end of the connecting arm is located in the first avoiding groove and connected with the groove wall of the first avoiding groove into a whole, the other end of the connecting arm is located in the second avoiding groove and connected with the side wall of the second avoiding groove into a whole, and the thickness of the connecting arm is smaller than the groove depth of the first avoiding groove and the groove depth of the second avoiding groove; when the first rubber mat is arranged relative to the second rubber mat, the connecting arm is bent and folded, and the bent and folded part of the connecting arm can completely sink into the first avoiding groove and / or the second avoiding groove; the multi-layer rubber mat sealing structure can be normally installed in the liquid return mechanism under the condition of preventing neglected installation. In addition, the utility model further discloses a hysteroscope.

Description

Technical Field

[0001] This utility model relates to a medical device, and more particularly to a hysteroscope and its multi-layer adhesive sealing structure. Background Technology

[0002] Currently, external instruments (such as, but not limited to, shaving tools) enter the uterine cavity through the instrument channel of the hysteroscope to perform corresponding operations. Since the hysteroscope also needs to be circulated with fluid, the instrument channel inserted into the hysteroscope must be sealed to prevent leakage from the gap between the external instrument and the channel. Therefore, two rubber gaskets are needed to seal the instrument channel. As the external instrument passes through the center of the rubber gasket, the gasket tightly holds the external instrument at the point where it passes through, thus achieving the purpose of sealing.

[0003] During the assembly of the hysteroscope, two rubber pads need to be installed inside the outer cylinder of the hysteroscope's fluid return mechanism. Since the two rubber pads are two separate parts, there is a possibility of missing one during the assembly process, i.e., only one rubber pad is installed.

[0004] In addition, the two rubber gaskets are sealed only by their interlayered end faces, so the sealing performance between the interlayered end faces of the two rubber gaskets is not good.

[0005] In addition, the insertion and removal of external instruments between the two rubber pads is not smooth.

[0006] Therefore, there is an urgent need for a hysteroscope and its multi-layered rubber gasket sealing structure to overcome one or more of the above-mentioned defects. Utility Model Content

[0007] One objective of this invention is to provide a multi-layered rubber gasket sealing structure for a hysteroscope, which can prevent leakage while still allowing for proper installation within the fluid return mechanism.

[0008] Another objective of this invention is to provide a hysteroscope that can be properly installed in the fluid return mechanism while preventing missed installation.

[0009] To achieve the above objectives, the multi-layered adhesive sealing structure of the hysteroscope of this utility model includes a first adhesive pad, a second adhesive pad for being layered with the first adhesive pad, and a flexible, bendable, and foldable connecting arm. A first recessed groove is formed on the sidewall of the first adhesive pad, and the first recessed groove also penetrates the layered end face of the first adhesive pad. A second recessed groove is formed on the sidewall of the second adhesive pad for being arranged opposite to the first recessed groove, and the second recessed groove also penetrates the layered end face of the second adhesive pad. One end of the connecting arm is located within the first recessed groove and is integrally connected to the groove wall of the first recessed groove, and the other end of the connecting arm is located within the second recessed groove and is integrally connected to the sidewall of the second recessed groove. The thickness of the connecting arm is less than the groove depth of both the first and second recessed grooves. During the layering process of the first adhesive pad relative to the second adhesive pad, the connecting arm bends and folds, and the bent and folded portion of the connecting arm can be completely submerged in the first recessed groove and / or the second recessed groove.

[0010] Compared with existing technologies, the design of "one end of the connecting arm is located in the first relief groove and is integrated with the groove wall of the first relief groove, and the other end of the connecting arm is located in the second relief groove and is integrated with the side wall of the second relief groove, and the thickness of the connecting arm is less than the groove depth of both the first relief groove and the second relief groove" allows the connecting arm to bend and fold during the layering of the first rubber pad relative to the second rubber pad. The bent and folded part of the connecting arm can be pressed into the first relief groove or the second relief groove by the operator, so that the bent and folded part is completely sunk into the first relief groove and / or the second relief groove, avoiding the bent and folded part from protruding outward from the first rubber pad and / or the second rubber pad, thereby ensuring that the multi-layer rubber pad sealing structure can be properly installed and operated in the return liquid mechanism; and since the first rubber pad and the second rubber pad are integrated by the connecting arm, the omission of the first rubber pad or the second rubber pad can be prevented.

[0011] Preferably, the depth of at least one of the first and second recesses is three times or more the thickness of the connecting arm.

[0012] Preferably, the first rubber pad has a sealing through hole for the insertion of an external instrument; the second rubber pad has a first slit opposite to the sealing through hole for the insertion of an external instrument.

[0013] Preferably, the first slit is in the shape of an "I".

[0014] Preferably, an insertion ring extends axially from the layered end face of the first rubber pad, and the insertion ring has a ring buckle that protrudes radially outward from the insertion ring; the layered end face of the first rubber pad has an outer annular surface surrounding the insertion ring from the outside of the insertion ring; the ring buckle has an annular end face arranged opposite to the outer annular surface; the second rubber pad has an insertion groove for the insertion ring and the ring buckle to be axially inserted into the second rubber pad together, and a groove for radially expanding the insertion groove and for the ring buckle to be inserted into the groove. The snap-fit ​​annular groove has a first groove wall and a second groove wall that are axially spaced apart from each other. The second groove wall is located between the first groove wall and the layered end face of the second rubber gasket, and the second groove wall is used to tightly adhere to the annular end face in a sealing manner. The slot of the insertion groove is located on the layered end face of the second rubber gasket, and the layered end face of the second rubber gasket has an outer sealing surface for tightly adhering to the outer annular surface in a sealing manner. The sealing through hole is arranged opposite to the space enclosed by the insertion ring body.

[0015] Preferably, the first rubber pad also has an axially extending guide ring arranged on opposite sides of the insertion ring body, the space enclosed by the guide ring body is arranged opposite to the sealing through hole, and the space enclosed by the guide ring body has a conical space that connects with the sealing through hole.

[0016] Preferably, the first rubber pad is further provided with a thinning groove, which penetrates the layered end face of the first rubber pad and communicates with the space enclosed by the sealing through hole and the insertion ring.

[0017] Preferably, the insertion groove is an annular groove; the insertion ring has an annular end face arranged opposite to the layered end face of the first rubber pad, and the annular end face is used to tightly adhere to the bottom surface of the insertion groove in a sealing manner.

[0018] Preferably, the second rubber pad has an annular fitting cavity and a frustum-shaped channel and a cylindrical channel surrounded by the insertion groove. The frustum-shaped channel penetrates the layered end face of the second rubber pad, and the cylindrical channel connects the frustum-shaped channel and the first seam. The fitting cavity and the insertion groove are arranged on opposite sides facing each other. The opening of the fitting cavity is located on the end face of the second rubber pad, which is opposite to the layered end face of the second rubber pad. The position of the second rubber pad surrounded by the fitting cavity forms a column, and the first seam is located on the column. The column has an inclined structure for making the end of the column conical.

[0019] To achieve the above objectives, the hysteroscope of this utility model includes a handle, a fluid return mechanism assembled in the handle, a strip-shaped insertion part assembled on the handle, and the aforementioned multi-layer rubber gasket sealing structure. The multi-layer rubber gasket sealing structure is assembled in the fluid return mechanism and seals the instrument channel of the fluid return mechanism.

[0020] Compared with existing technologies, the design of "one end of the connecting arm is located in the first relief groove and is integrated with the groove wall of the first relief groove, and the other end of the connecting arm is located in the second relief groove and is integrated with the side wall of the second relief groove, and the thickness of the connecting arm is less than the groove depth of both the first relief groove and the second relief groove" allows the connecting arm to bend and fold during the layering of the first rubber pad relative to the second rubber pad. The bent and folded part of the connecting arm can be pressed into the first relief groove or the second relief groove by the operator, so that the bent and folded part is completely sunk into the first relief groove and / or the second relief groove, avoiding the bent and folded part from protruding outward from the first rubber pad and / or the second rubber pad, thereby ensuring that the multi-layer rubber pad sealing structure can be properly installed and operated in the return liquid mechanism; and since the first rubber pad and the second rubber pad are integrated by the connecting arm, the omission of the first rubber pad or the second rubber pad can be prevented. Attached Figure Description

[0021] Figure 1 This is a three-dimensional view of the hysteroscope of this utility model.

[0022] Figure 2 yes Figure 1 A three-dimensional exploded view.

[0023] Figure 3 yes Figure 2 A further exploded 3D diagram.

[0024] Figure 4 yes Figure 3 A further breakdown of the 3D diagram.

[0025] Figure 5 This is a perspective view of the multi-layered rubber gasket sealing structure in the hysteroscope of this utility model after the first and second rubber gasket layers are installed.

[0026] Figure 6 yes Figure 5 A floor plan viewed from top to bottom.

[0027] Figure 7 It is along Figure 6 Internal view of the section cut along line AA.

[0028] Figure 8 This is a three-dimensional view of the multi-layered rubber gasket sealing structure in the hysteroscope of this utility model after the first rubber gasket is unfolded relative to the second rubber gasket.

[0029] Figure 9 yes Figure 8 A stereoscopic view from another angle. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to specific implementation examples and accompanying drawings, and the technical solutions of this utility model will be explained. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Embodiments of this utility model will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please see Figures 1 to 4 The hysteroscope 1000 of this utility model includes a multi-layer rubber gasket sealing structure 100, a handle 200, a fluid return mechanism 300 assembled in the handle 200, and a strip-shaped insertion part 400 assembled on the handle 200. Since the insertion part 400, the handle 200 and the fluid return mechanism 300 are well known in the art, they will not be described in detail here.

[0033] The multi-layer rubber gasket sealing structure 100 is assembled inside the liquid return mechanism 300 and seals the instrument channel 310 of the liquid return mechanism 300 to prevent liquid leakage from the gap between the instrument channel 310 and the external instrument inserted into the instrument channel 310; alternatively, it can be combined with Figures 2 to 4 As an example, the multi-layer rubber gasket sealing structure 100 is assembled inside the outer cylinder 320 of the return mechanism 300.

[0034] Combined Figures 5 to 9As an example, the multi-layer gasket sealing structure 100 includes a first gasket 10, a second gasket 20 for being layered with the first gasket 10, and a flexible, bendable, foldable connecting arm 30. A first recess 12 is formed on the sidewall 11 of the first gasket 10, and the first recess 12 also penetrates the layering end face 13 of the first gasket 10. A second recess 22 is formed on the sidewall 21 of the second gasket 20 for being arranged opposite to the first recess 12, and the second recess 22 also penetrates the layering end face 23 of the second gasket 20. One end 31 of the connecting arm 30 is located within the first recess 12 and is integrally connected to the groove wall 121 of the first recess 12, as shown in the diagram. Figure 7 As shown; the other end 32 of the connecting arm 30 is located in the second relief groove 22 and is integrated with the side wall 221 of the second relief groove 22, as shown in the figure. Figure 8 As shown; and the thickness of the connecting arm 30 is less than the groove depth of both the first clearance groove 12 and the second clearance groove 22.

[0035] Therefore, during the process of layering the first rubber pad 10 relative to the second rubber pad 20, the first rubber pad 10 causes the connecting arm 30 to bend and fold, and the bent and folded part 33 of the connecting arm 30 can be completely sunk into the first relief groove 12 and the second relief groove 22, as shown in the figure. Figure 5 As shown; thus ensuring that the connecting arm 30 does not protrude from the side wall 11 of the first rubber pad 10 and / or the side wall 21 of the second rubber pad 20 after being layered with the first rubber pad 10 and the second rubber pad 20, thereby ensuring that the multi-layer rubber pad sealing structure 100 can be properly installed and operated within the cylinder 320 outside the return mechanism 300. It should be further noted that... Figure 5 In the diagram, the direction indicated by the dashed arrow is the thickness direction of the connecting arm 30, which is also the groove depth direction of both the first clearance groove 12 and the second clearance groove 22; furthermore, although Figure 5 This demonstrates that the bent fold portion 33 of the connecting arm 30 is completely submerged in the first recess 12 and the second recess 22. Obviously, depending on actual needs, the bent fold portion 33 of the connecting arm 30 can also be completely submerged in either the first recess 12 or the second recess 22. Therefore, it is not considered... Figure 5 The above is a limited description. More specifically, as follows:

[0036] like Figure 5 As shown, as an example, the groove depth of both the first relief groove 12 and the second relief groove 22 is three times or more the thickness of the connecting arm 30; obviously, depending on actual needs, the groove depth of the first relief groove 12 or the second relief groove 22 can also be three times or more the thickness of the connecting arm 30.

[0037] Combination Figures 5 to 9As an example, the first rubber pad 10 has a sealing through-hole 14 for the insertion of external instruments, and the second rubber pad 20 has a first slit 24 for the insertion of external instruments, which is opposite (e.g., aligned) to the sealing through-hole 14. Therefore, during the process of the external instrument passing through the sealing through-hole 14 and then through the first slit 24, the sealing through-hole 14 primarily seals the external instrument, while the first slit 24 is opened during the instrument's exit, allowing the second rubber pad 20 to tightly hold the external instrument in place by defining the position of the first slit 24. Furthermore, since the second rubber pad 20 has a long and narrow first slit 24, after the external instrument is inserted, the first slit 24 of the second rubber pad 20 automatically returns to its original state due to its rubber elasticity, thus restoring the sealing function of the instrument channel 310. Specifically, in... Figure 5 , Figure 6 and Figure 9 As an example, the first seam 24 is in the shape of an "I" to facilitate the processing of the first seam 24 on the second rubber pad 20. For example, the first seam 24 can be formed by making cuts on the second rubber pad 20 with a tool. More specifically, as an example, the seam width of the first seam 24 ranges from 1 mm to 5 mm, for example, the seam width of the first seam 24 is 1 mm, 2 mm, 3 mm, 4 mm or 5 mm.

[0038] like Figures 7 to 9 As an example, the first adhesive pad 10 has an axially visible end face 13 on the layered surface (visible). Figure 7 A connector ring 15 extends from the top and bottom of the connector, and the connector ring 15 has radial (visible) features. Figure 7 The buckle 16 protrudes outward from the insertion ring body 15 in the left-right direction, and the layered end face 13 of the first rubber pad 10 has an outer annular surface 131 surrounding the insertion ring body 15 from the outside. The buckle 16 has an annular end face 161 arranged opposite to the outer annular surface 131. The second rubber pad 20 has an insertion groove 25 for the insertion ring body 15 and the buckle 16 to be axially inserted into the second rubber pad 20, and an annular groove 26 for radially expanding the insertion groove 25 and for the buckle 16 to be fastened. The annular groove 26 has a first groove wall surface 261 and a second groove wall surface 262 that are axially spaced apart from each other. The second groove wall surface 262 is located between the first groove wall surface 261 and the layered end face 23 of the second rubber pad 20, and the second groove wall surface 262 is used to tightly fit the annular end face 161 in a sealing manner. The slot 251 of the insertion groove 25 is located on the layered end face 23 of the second rubber pad 20, and the layered end face 23 of the second rubber pad 20 has an outer sealing surface 231 for sealing with the outer annular surface 131. At this time, the sealing through hole 14 is arranged opposite (e.g., aligned) to the space 151 enclosed by the insertion ring body 15 to meet the need for external instruments to pass through the space 151 enclosed by the insertion ring body 15.

[0039] Therefore, by utilizing the cooperation between the outer annular surface 131 and the outer sealing surface 231, and the cooperation between the second groove wall surface 262 and the annular end face 161, a seal is provided at two points, effectively improving the sealing effect between the layered first rubber gasket 10 and the second rubber gasket 20. Furthermore, by utilizing the cooperation between the insertion ring body 15 and the insertion groove 25, and the cooperation between the ring buckle 16 and the annular groove 26, the stability between the layered first rubber gasket 10 and the second rubber gasket 20 is further improved. In addition, a more detailed description of the first rubber gasket 10 and the second rubber gasket 20 is as follows:

[0040] like Figure 7 As shown, as an example, the first rubber pad 10 also has a guide ring 17 extending axially on it and arranged on the opposite side to the insertion ring 16. For example, in Figure 7 In this configuration, the guide ring 17 is located below the first rubber pad 10, while the insertion ring 16 is located above the first rubber pad 10. The space 171 enclosed by the guide ring 17 is arranged opposite to the sealing through hole 14. The space 171 enclosed by the guide ring 17 has a conical space 1711 that connects and communicates with the sealing through hole 14. This conical space 1711 helps to better guide external instruments into the sealing through hole 14, improving operational convenience. Furthermore, regarding... Figure 7 As an example, the first rubber pad 10 is also provided with a thinning groove 18. The thinning groove 18 penetrates the layered end face 13 of the first rubber pad 10 and connects to the space 151 enclosed by the sealing through hole 14 and the insertion ring body 15. This thinning groove 18 makes the position 181 of the first rubber pad 10 between the thinning groove 18 and the conical space 1711 more flexible and elastic. Furthermore, in... Figure 8 In this example, the insertion groove 25 is an annular groove to facilitate the manufacturing of the insertion groove 25 on the second rubber pad 20; the insertion ring body 15 has an annular end face 152 arranged opposite to the layered end face 13 of the first rubber pad 10, the annular end face 152 being used to tightly adhere to the bottom surface 252 of the insertion groove 25 in a sealing manner, so as to further improve the sealing reliability between the first rubber pad 10 and the second rubber pad 20.

[0041] like Figures 7 to 9As shown in the illustration, the second rubber pad 20 has an annular fitting cavity 27 and a frustum-shaped channel 28 and a cylindrical channel 29 surrounded by an insertion groove 25. The frustum-shaped channel 28 penetrates the layered end face 23 of the second rubber pad 20, and the cylindrical channel 29 connects the frustum-shaped channel 27 and the first slot 24. This design better guides the external instrument towards the first slot 24 during insertion, effectively improving the convenience of inserting the external instrument. Furthermore, the housing cavity 27 and the insertion slot 25 are arranged on opposite sides facing each other. The opening 271 of the housing cavity 27 is located on the end face 23' of the second rubber pad 20. This end face 23' is opposite to the layered end face 23 of the second rubber pad 20, and a column 24' is formed at the position where the second rubber pad 20 is surrounded by the housing cavity 27. The first seam 24 is located on the column 24'. An inclined structure 241 is provided on the column 24' to make the end of the column 24' conical. With the help of the inclined structure 241, on the one hand, the column 24' is shaped like a duckbill, and on the other hand, the liquid in the instrument channel 320 can apply an inclined force to the inclined structure 241 relative to the column 24'. Thus, the column 24' is used to define the position of the first seam 24 and has a better gripping effect on the external instrument.

[0042] Compared with the prior art, by using the design that "one end 31 of the connecting arm 30 is located in the first relief groove 12 and is integrated with the groove wall 121 of the first relief groove 12, and the other end 32 of the connecting arm 30 is located in the second relief groove 22 and is integrated with the side wall 221 of the second relief groove 22, and the thickness of the connecting arm 30 is less than the groove depth of both the first relief groove 12 and the second relief groove 22", the connecting arm 30 can be bent and folded during the layering of the first rubber pad 10 relative to the second rubber pad 20, and the bending of the connecting arm 30 The folded portion 33 can be pressed into the first relief groove 12 and / or the second relief groove 22 by the operator, so that the bent folded portion 33 is completely submerged in the first relief groove 12 and / or the second relief groove 22, preventing the bent folded portion 33 from protruding outward from the first rubber pad 10 and / or the second rubber pad 20, thereby ensuring that the multi-layer rubber pad sealing structure 100 can be properly installed and operated in the return liquid mechanism 300; and since the first rubber pad 10 and the second rubber pad 20 are connected as one unit by the connecting arm 30, it can prevent the first rubber pad 10 or the second rubber pad 20 from being missed.

[0043] It is worth noting that the connecting arm 30 can use the same rubber material as the first rubber pad 10 and the second rubber pad 20, but obviously, it can also use a different material than the first rubber pad 10 and the second rubber pad 20.

[0044] It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, the embodiments disclosed above are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Therefore, equivalent variations made within the scope of the claims of this utility model are still within the scope of this utility model.

Claims

1. A multi-layered rubber gasket sealing structure for a hysteroscope, comprising a first rubber gasket and a second rubber gasket for layering, characterized in that, The multi-layer gasket sealing structure further includes a flexible and bendable connecting arm that can be folded in half. A first avoidance groove is formed on the side wall of the first gasket, and the first avoidance groove also penetrates through the layered end face of the first gasket; a second avoidance groove for being arranged opposite to the first avoidance groove is formed on the side wall of the second gasket, and the second avoidance groove also penetrates through the layered end face of the second gasket; one end of the connecting arm is located in the first avoidance groove and is integrally connected to the groove wall of the first avoidance groove, the other end of the connecting arm is located in the second avoidance groove and is integrally connected to the side wall of the second avoidance groove, and the thickness of the connecting arm is less than the groove depths of both the first avoidance groove and the second avoidance groove; when the first gasket is layered relative to the second gasket, the connecting arm is bent and folded, and the bent and folded part of the connecting arm can completely sink into the first avoidance groove and / or the second avoidance groove.

2. The multi-layer gasket sealing structure according to claim 1, characterized in that, The groove depth of at least one of the first avoidance groove and the second avoidance groove is 3 times or more than 3 times the thickness of the connecting arm.

3. The multi-layer gasket sealing structure according to claim 1, characterized in that, A sealing through hole for an external instrument to insert and pass through is formed on the first gasket; a first slit for being opposite to the sealing through hole and for an external instrument to insert and pass through is formed on the second gasket.

4. The multi-layer gasket sealing structure according to claim 3, characterized in that, The first slit is in a "one" shape.

5. The multi-layer gasket sealing structure according to claim 3, characterized in that, An insertion ring body axially extends from the layered end face of the first gasket, and a ring buckle radially protruding outward from the insertion ring body is provided on the insertion ring body; the layered end face of the first gasket has an outer ring surface surrounding the insertion ring body from the outside of the insertion ring body; the ring buckle has an annular end face arranged opposite to the outer ring surface; an insertion slot for the insertion ring body and the ring buckle to axially insert into the second gasket together and a ring slot for expanding the insertion slot in the radial direction and for the ring buckle to be buckled are formed on the second gasket, the ring slot has a first groove wall surface and a second groove wall surface axially spaced apart from each other, the second groove wall surface is located between the first groove wall surface and the layered end face of the second gasket, and the second groove wall surface is used for making a sealing surface-to-surface close contact with the annular end face; the slot opening of the insertion slot is located on the layered end face of the second gasket, and the layered end face of the second gasket has an outer sealing surface for making a sealing surface-to-surface close contact with the outer ring surface; the space surrounded by the sealing through hole is arranged opposite to the space surrounded by the insertion ring body.

6. The multi-layer gasket sealing structure according to claim 5, characterized in that, A guiding ring body axially extending on the first gasket and arranged on the opposite side of the insertion ring body is further provided, the space surrounded by the guiding ring body is arranged opposite to the sealing through hole, and the space surrounded by the guiding ring body has a tapered space connected and communicated with the sealing through hole.

7. The multi-layer gasket sealing structure according to claim 5, characterized in that, A thinning groove is further formed on the first gasket, and the thinning groove penetrates through the layered end face of the first gasket and is connected to the space surrounded by the sealing through hole and the insertion ring body.

8. The multi-layer gasket sealing structure according to claim 5, characterized in that, The insertion slot is an annular slot; the insertion ring body has an annular end face arranged opposite to the layered end face of the first gasket, and this annular end face is used for making a sealing surface-to-surface close contact with the bottom surface of the insertion slot.

9. The multi-layer gasket sealing structure according to claim 5, characterized in that, The second rubber pad has an annular fitting cavity and a frustum-shaped channel and a cylindrical channel surrounded by the insertion groove. The frustum-shaped channel penetrates the layered end face of the second rubber pad, and the cylindrical channel connects the frustum-shaped channel and the first seam. The fitting cavity and the insertion groove are arranged on opposite sides of each other. The opening of the fitting cavity is located on the end face of the second rubber pad, which is opposite to the layered end face of the second rubber pad. The position of the second rubber pad surrounded by the fitting cavity forms a column. The first seam is located on the column. The column has an inclined structure for making the end of the column conical.

10. A hysteroscope, comprising a handle, a fluid return mechanism assembled within the handle, and an elongated insertion portion assembled on the handle, characterized in that, The hysteroscope further includes a multi-layered rubber gasket sealing structure according to any one of claims 1 to 9, wherein the multi-layered rubber gasket sealing structure is assembled in the fluid return mechanism and seals the instrument channel of the fluid return mechanism.

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