Endoscope and liquid path control mechanism thereof

Abstract

The utility model discloses a kind of liquid path control mechanisms of endoscope, include cylinder and rotating operating body.Rotating operating body is assembled in the internal space of cylinder, and inlet, liquid inlet, liquid return inlet and liquid return outlet that are communicated with the internal space of cylinder are equipped on cylinder;Rotating operating body is opened with first through-hole and second through-hole that are separated from each other through;First through-hole is respectively communicated with inlet and liquid inlet when rotating operating body is rotated to first position or second position relative to cylinder, and first through-hole is disconnected with at least one of inlet and liquid inlet when rotating operating body is rotated to third position;Second through-hole is disconnected with at least one of liquid return inlet and liquid return outlet when rotating operating body is rotated to first position or third position;Second through-hole is respectively communicated with liquid return inlet and liquid return outlet when rotating operating body is rotated to second position;To reach the advantage that operation is convenient with simplifying operation step.In addition, the utility model also discloses an endoscope.

Description

Technical Field

[0001] This utility model relates to a medical device, and more particularly to an endoscope and its fluid circuit control mechanism. Background Technology

[0002] As is well known, hysteroscopy is a type of endoscope used for uterine examinations and treatments.

[0003] The use of hysteroscopy involves the introduction of external cleaning fluid into the uterine cavity for cleaning and the removal of the cleaned fluid. Therefore, the design of a control mechanism is indispensable in the structure of a hysteroscope.

[0004] Currently, in hysteroscopes and their fluid return mechanisms disclosed in, for example, Chinese Patent Application No. 202421265388.3, ​​the fluid inlet and outlet switches are separate and operate independently, leading to an increase in the steps of fluid circuit control. For example, it is necessary to operate the fluid inlet and outlet switches separately and put them in the open position to open the fluid inlet and return circulation; similarly, it is necessary to operate the fluid inlet and outlet switches separately and put them in the closed position to close the fluid inlet and return circulation. Therefore, the hysteroscope and its fluid return mechanism disclosed in Chinese Patent Application No. 202421265388.3 have the drawback of inconvenient fluid circuit control operation.

[0005] Therefore, there is an urgent need for an endoscope and its fluid control mechanism to overcome the above-mentioned defects. Utility Model Content

[0006] One objective of this invention is to provide a fluid control mechanism for an endoscope, which simplifies the operation steps and has the advantage of convenient operation.

[0007] Another objective of this invention is to provide an endoscope that simplifies the operation process and offers the advantage of convenient operation.

[0008] To achieve the above objectives, the fluid control mechanism of the endoscope of this utility model includes a cylindrical body and a rotating operating body. The rotating operating body is rotatably mounted in the internal space of the cylindrical body and is sealed to the cylindrical body. The cylindrical body is provided with a fluid inlet, a fluid outlet, a fluid return inlet, and a fluid return outlet communicating with the internal space of the cylindrical body. The rotating operating body has a first through hole and a second through hole that are spaced apart from each other and located in the internal space. When the rotating operating body rotates relative to the cylindrical body to a first position or a second position, the first through hole communicates with the fluid inlet and the fluid outlet, respectively. When the rotating operating body rotates to a third position, the first through hole is disconnected from at least one of the fluid inlet and the fluid outlet. When the rotating operating body rotates to the first position or the third position, the second through hole is disconnected from at least one of the fluid return inlet and the fluid return outlet. When the rotating operating body rotates to the second position, the second through hole communicates with both the fluid return inlet and the fluid return outlet.

[0009] Compared with the prior art, the fluid circuit control mechanism of this utility model controls the fluid circuit state by rotating the rotating operating body relative to the cylinder to a first position, a second position, or a third position. For example, when the rotating operating body rotates to the first position (initial position), the inlet and outlet are connected through a first through hole, while the return inlet and outlet are disconnected to meet the need for fluid inlet only, which is suitable for uterine distension operations. When the rotating operating body rotates to the second position, the inlet and outlet are connected through the first through hole, and the return inlet and outlet are connected through the second through hole to meet the needs for both fluid inlet and return, which is suitable for operations that involve both uterine distension and external suction. When the rotating operating body rotates to the third position, the inlet and outlet are disconnected, and the return inlet and outlet are disconnected, which is suitable for operations after surgery. Therefore, the fluid circuit control mechanism of this utility model simplifies the operation steps and has the advantage of convenient operation.

[0010] Preferably, the two ends of the first through hole extend in the forward and reverse directions along the rotation direction of the rotating operating body, and the openings at both ends of the first through hole and the second through hole are located on the side of the rotating operating body.

[0011] Preferably, the openings at both ends of the first through hole are waist-shaped openings.

[0012] Preferably, the sidewall of the rotating operating body is fitted with a first sealing member and a second sealing member spaced apart from each other; the first sealing member is respectively arranged on the opposite sides of the opening of the first through hole, and the first sealing member also seals against the sidewalls of both the cylinder and the rotating operating body; the second sealing member is respectively arranged on the opposite sides of the opening of the second through hole, and the second sealing member also seals against the sidewalls of both the cylinder and the rotating operating body.

[0013] Preferably, one of the cylinder and the rotating operating body is provided with a first limiting structure and a second limiting structure located in the internal space. The first limiting structure and the second limiting structure are arranged spaced apart from each other along the rotation direction of the rotating operating body. The rotating operating body is correspondingly provided with a matching limiting structure placed between the first limiting structure and the second limiting structure. When the rotating operating body rotates to the second position, the matching limiting structure abuts against the first limiting structure and limits the rotation. When the rotating operating body rotates to the third position, the matching limiting structure abuts against the second limiting structure and limits the rotation.

[0014] Preferably, the first limiting structure and the second limiting structure are located on the end wall of the cylinder or the end wall of the rotating operating body, and the limiting structure protrudes correspondingly from the end wall of the rotating operating body or the end wall of the cylinder.

[0015] Preferably, the first limiting structure and the second limiting structure are arranged in an inverted "V" shape and each is an inclined plane; the side surface of the limiting structure has a first plane and a second plane that are parallel to each other, the second plane is arranged facing the second limiting structure, and the first plane is arranged facing the first limiting structure.

[0016] Preferably, the first limiting structure and the second limiting structure are tangentially connected by a first cylindrical surface with a minor arc as the guideline; the side surface of the limiting structure has a second cylindrical surface with a minor arc of 90 degrees as the guideline, the second cylindrical surface is tangentially connected between the first plane and the second plane, and the second cylindrical surface also rolls with the first cylindrical surface.

[0017] Preferably, the rotating operating body also has a knob structure extending outside the internal space of the cylinder; when the rotating operating body is in the first position, it can be rotated to the second position along one of the forward and reverse directions of the rotation direction of the rotating operating body, and when the rotating operating body is in the first position, it can be rotated to the third position along the other of the forward and reverse directions of the rotation direction of the rotating operating body.

[0018] To achieve the above objectives, the endoscope of this utility model includes an insert, a liquid return mechanism assembled and connected to the tail end of the insert, and the aforementioned liquid path control mechanism.

[0019] Compared to existing technologies, the fluid control mechanism controls the fluid path state by rotating the rotating manipulator relative to the cylinder to a first, second, or third position. For example, when the rotating manipulator is rotated to the first position (initial position), the inlet and outlet fluids are connected through a first through-hole, while the return inlet and outlet fluids are disconnected, meeting the need for fluid inlet only, suitable for uterine distension operations. When the rotating manipulator is rotated to the second position, the inlet and outlet fluids are connected through the first through-hole, and the return inlet and outlet fluids are connected through the second through-hole, meeting the needs for both fluid inlet and return, suitable for simultaneous uterine distension and suction operations. When the rotating manipulator is rotated to the third position, the inlet and outlet fluids are disconnected, and the return inlet and outlet fluids are disconnected, suitable for operations after surgery. Therefore, the endoscope of this invention simplifies the operation steps and has the advantage of convenient operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the endoscope of this utility model when the rotating operating body is rotated to the first position (initial position).

[0021] Figure 2 This is a perspective view of the hydraulic control mechanism of this utility model when the rotating operating body is rotated to the first position.

[0022] Figure 3 yes Figure 2 A plan view of the hydraulic control mechanism in the indicated state.

[0023] Figure 4 It is along Figure 3 Internal view of the section cut along line AA.

[0024] Figure 5 yes Figure 3 The liquid circuit control mechanism shown is a plan view viewed from right to left.

[0025] Figure 6 It is along Figure 5 Internal view of the section cut along the BB line.

[0026] Figure 7 This is a perspective view of the hydraulic control mechanism of this utility model when the rotating operating body is rotated to the second position.

[0027] Figure 8 yes Figure 7 A plan view of the hydraulic control mechanism in the indicated state.

[0028] Figure 9 It is along Figure 8 Internal view of the section cut along the CC line.

[0029] Figure 10 yes Figure 8 The liquid circuit control mechanism shown is a plan view viewed from right to left.

[0030] Figure 11 It is along Figure 10 Internal view of the section cut along the DD line.

[0031] Figure 12 This is a perspective view of the hydraulic control mechanism of this utility model when the rotating operating body is rotated to the third position.

[0032] Figure 13 yes Figure 12 A plan view of the hydraulic control mechanism in the indicated state.

[0033] Figure 14 It is along Figure 13 Internal view of the section cut along the EE line.

[0034] Figure 15 yes Figure 13 The liquid circuit control mechanism shown is a plan view viewed from right to left.

[0035] Figure 16 It is along Figure 15 Internal view of the section cut along the FF line.

[0036] Figure 17 This is a perspective view of the rotating operating body in the hydraulic control mechanism of this utility model.

[0037] Figure 18 yes Figure 17 The diagram shows the internal view of the rotating operating body cut through the center of the first through hole and perpendicular to the length direction of the rotating operating body by a plane.

[0038] Figure 19 This is a perspective view of the cylinder in the liquid circuit control mechanism of this utility model. Detailed Implementation

[0039] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0040] Please see Figure 1 The endoscope 1000 of this utility model includes a fluid control mechanism 100, an insert 200, and a fluid return mechanism 300 assembled and connected to the tail end of the insert 200. Since the specific structures of the fluid return mechanism 300 and the insert 200 are well known in the art, please refer to the hysteroscope and its fluid return mechanism disclosed in Chinese Patent Application No. 202421265388.3, ​​so they will not be described in detail here.

[0041] Combined Figure 2 , Figure 6 , Figure 7, Figure 11 , Figure 12 and Figure 16 The liquid control mechanism 100 includes a cylinder 10 and a rotary operating body 20. The rotary operating body 20 is rotatably mounted in the internal space 11 of the cylinder 10 and is sealed to the cylinder 10 to prevent liquid from leaking to the outside through the joint between the rotary operating body 20 and the cylinder 10. Alternatively, as an example, the rotary operating body 20 may also have a knob structure 26 extending outside the internal space 11 of the cylinder 10, so that the operator can more easily apply force to operate the rotary operating body 20 by means of the knob structure 26 located outside the cylinder 10. Obviously, depending on actual needs, the rotary operating body 20 may also be made not to extend outside the internal space 11 of the cylinder 10, as long as the cylinder 10 has a window for the rotary operating body 20 to be exposed to the outside, so that the operator can apply force to operate the rotary operating body 20 through the window. Therefore, it is not limited to what is shown in the figure. In addition, the sealing fit between the rotary operating body 20 and the cylinder 10 will be mentioned below.

[0042] Meanwhile, the cylinder 10 is provided with a liquid inlet 12, a liquid inlet 13, a liquid return inlet 14, and a liquid return outlet 15 communicating with the internal space 11 of the cylinder 10. Optionally, in Figure 6 , Figure 11 and Figure 16 In this example, the liquid inlet 12, liquid outlet 13, return inlet 14, and return outlet 15 are spaced apart from each other. The liquid inlet 12 and liquid outlet 13 are aligned radially in the cylinder 10, and the return inlet 14 and return outlet 15 are also aligned radially in the cylinder 10. The return inlet 14 and liquid outlet 13 are located on the same side of the cylinder 10, and the return outlet 15 and liquid inlet 12 are located on the same side of the cylinder 10. This design facilitates the manufacturing and processing of the cylinder 10 and also facilitates the connection operation between the cylinder 10 and the return mechanism 300. Specifically, the liquid inlet pipe 310 of the return mechanism 300 is connected to the liquid outlet 13, and the return pipe 320 of the return mechanism 300 is connected to the return inlet 14. See the attached diagram for details. Figure 1 As shown.

[0043] The rotating operating body 20 has a first through hole 21 and a second through hole 22 that are spaced apart from each other and located in the internal space 11. Therefore, when the rotating operating body 20 rotates relative to the cylinder 10 to the first position, the first through hole 21 is connected to the liquid inlet 12 and the liquid outlet 13, respectively, and the second through hole 22 is disconnected from the liquid return inlet 14 and the liquid return outlet 15, as shown in the figure. Figure 6 As shown, this is to meet the operational requirements of fluid inlet and uterine expansion; when the rotating operating body 20 rotates relative to the cylinder 10 to the second position, the first through hole 21 remains connected to the fluid inlet 12 and the fluid outlet 13 respectively, and at the same time, the second through hole 22 is also connected to the return fluid inlet 14 and the return fluid outlet 15 respectively, as shown in the diagram. Figure 11 As shown, this is to meet the operational requirements of simultaneous liquid inlet and liquid return; when the rotating operating body 20 is rotated to the third position, at this time, the first through hole 21 is disconnected from the liquid inlet 12 and the liquid outlet 13 respectively, and the second through hole 22 is disconnected from the liquid return inlet 14 and the liquid return outlet 15 respectively, as shown in the figure. Figure 16 As shown, this is for use in situations where surgery has just ended. It should be noted that... Figure 6 and Figure 16 Although it is shown that the first through hole 21 is disconnected from both the liquid inlet 12 and the liquid outlet 13 in the third position, it is clear that, depending on actual needs, the first through hole 21 can also be disconnected from either the liquid inlet 12 or the liquid outlet 13; furthermore, in Figure 6 and Figure 16 The diagram also shows that the second through-hole 22 is disconnected from both the return liquid inlet 14 and the return liquid outlet 15 in the first or third position. Clearly, depending on actual needs, the second through-hole 22 can also be disconnected from either the return liquid inlet 14 or the return liquid outlet 15. Therefore, it is not necessary to... Figure 6 and Figure 16 This is a limited list. More specifically, as follows:

[0044] Combination Figure 17 and Figure 18 As an example, the two ends 21a of the first through hole 21 also extend in the forward and reverse directions along the rotation direction of the rotating operating body 20, so as to better meet the need for the first through hole 21 to remain in communication with the liquid inlet 12 and the liquid outlet 13 in the first or second position; alternatively, in Figure 17 In this example, the openings 211 at the two ends 21a of the first through hole 21 are waist-shaped openings. In addition, the openings 211 at the two ends 21a of the first through hole 21 are located on the side 23a of the rotating operating body 20. Similarly, the openings 221 at the two ends of the second through hole 22 are also located on the side 23a of the rotating operating body 20.

[0045] like Figure 6 , Figure 11 , Figure 16 and Figure 17 As shown, as an example, the sidewall 23 of the rotating operating body 20 is fitted with a first sealing member 30 and a second sealing member 40 spaced apart from each other; the first sealing member 30 is respectively arranged on the opposite sides of the opening 211 of the first through hole 21, and the first sealing member 30 also seals with the sidewall 16 (23) of both the cylinder 10 and the rotating operating body 20; the second sealing member 40 is respectively arranged on the opposite sides of the opening 221 of the second through hole 22, and the second sealing member 40 also seals with the sidewall 16 (23) of both the cylinder 10 and the rotating operating body 20; so as to achieve the purpose of lateral sealing of the cylinder 10 and the rotating operating body 20 by means of the cooperation of the first sealing member 30 and the second sealing member 40. Specifically, in Figure 6 , Figure 11 , Figure 16 and Figure 17 In this example, there are two first seals 30 and two second seals 40, and they are sealing rings, but this is not a limitation.

[0046] Combination Figure 2 , Figure 5 , Figure 7 , Figure 10 , Figure 12 and Figure 15 As an example, when the rotating manipulator 20 is in the first position, it can rotate to the second position along either the forward or reverse direction of the rotation direction of the rotating manipulator 20. When the rotating manipulator 20 is in the first position, it can rotate to the third position along either the forward or reverse direction of the rotation direction of the rotating manipulator 20. This design makes the second and third positions arranged on opposite sides of the first position, so that when the first position is the initial position, it is convenient for the rotating manipulator 20 to quickly switch from the initial position to the second or third position.

[0047] In order to control the precision of rotating the rotating manipulator 20 to the second or third position, combined with Figure 4 , Figure 9 , Figure 14 and Figure 19 As an example, the cylinder 10 is provided with a first limiting structure 17 and a second limiting structure 18 located in the internal space 11. The first limiting structure 17 and the second limiting structure 18 are along the rotation direction of the rotating operating body 20 (see...). Figure 4 , Figure 9 and Figure 14 The rotating operating body 20 is arranged in a clockwise and counterclockwise direction, spaced apart from each other. Correspondingly, a limiting structure 24 is provided on the rotating operating body 20, positioned between the first limiting structure 17 and the second limiting structure 18. When the rotating operating body 20 rotates to the second position, the limiting structure 24 abuts against the first limiting structure 17, limiting its position. (See attached diagram). Figure 9 As shown; when the rotating operating body 20 rotates to the third position, the limiting structure 24 abuts against the second limiting structure 18 and limits its movement, as shown in the diagram. Figure 14 As shown. Specifically, at Figure 19 In the example, the first limiting structure 17 and the second limiting structure 18 are located on the end wall 19 of the cylinder 10, and the corresponding limiting structure 24 protrudes from the end wall 23 of the rotating operating body 20 (see...). Figure 17 This design allows the cylinder 10 and the rotating operating body 20 to be positioned relative to each other via their end walls 19 (23), thus reducing the radial dimension of the cylinder 10. Furthermore, in... Figure 4 , Figure 9 and Figure 14In this example, the first limiting structure 17 and the second limiting structure 18 are arranged in an inverted "V" shape and are each inclined planes. The side surface of the limiting structure 24 has a first plane 241 and a second plane 242 that are parallel to each other. The second plane 242 is arranged facing the second limiting structure 18, and the first plane 241 is arranged facing the first limiting structure 17. This ensures that the limiting structure 24 makes surface-to-surface contact with the cylinder 10 in both the second and third positions, thus improving positioning reliability. Alternatively, in... Figure 4 , Figure 9 and Figure 14 In the example, the first limiting structure 17 and the second limiting structure 18 are tangentially connected by a first cylindrical surface 19' with a minor arc as its guideline. The side surface of the limiting structure 24 has a second cylindrical surface 243 with a minor arc of 90 degrees as its guideline. The second cylindrical surface 243 is tangentially connected between the first plane 241 and the second plane 242, and the second cylindrical surface 243 also rolls with the first cylindrical surface 19'. This design ensures that the rotation center line of the rotating operating body 20, the center line of the first cylindrical surface 19', and the center line of the second cylindrical surface 243 coincide, as shown in the figure. Figure 6 , Figure 11 and Figure 16 As shown by the center line, and in conjunction with the side wall 16 of the cylinder 10, the rotation of the rotating operating body 20 is made more reliable. It should be noted that, although... Figure 4 , Figure 9 and Figure 14 The image shows the first limiting structure 17 and the second limiting structure 18 provided by the cylinder 10, and the matching limiting structure 24 provided by the rotating operating body 20. Obviously, depending on actual needs, the rotating operating body 20 can also be provided with the first limiting structure 17 and the second limiting structure 18, and the cylinder 10 can be provided with the matching limiting structure 24. Therefore, it is not considered... Figure 4 , Figure 9 and Figure 14 The above is the limit.

[0048] Compared with the prior art, the fluid control mechanism 100 controls the fluid circuit state by rotating the rotating operating body 20 relative to the cylinder 10 to a first position, a second position, or a third position. For example, when the rotating operating body 20 rotates to the first position (initial position), the inlet 12 and the outlet 13 are connected through the first through hole 21, while the return inlet 14 and the return outlet 15 are disconnected to meet the need for fluid intake only, which is suitable for uterine distension operations. When the rotating operating body 20 rotates to the second position, the inlet 12 and the outlet 13 are connected through the first through hole 21, and the return inlet 14 and the return outlet 15 are connected through the second through hole 22 to meet the needs for both fluid intake and return, which is suitable for uterine distension and external suction operations. When the rotating operating body 20 rotates to the third position, the inlet 12 and the outlet 13 are disconnected, and the return inlet 14 and the return outlet 15 are disconnected, which is suitable for operations after the operation is completed. Therefore, the endoscope 1000 of this invention simplifies the operation steps and has the advantage of convenient operation.

[0049] It should be noted that, at Figure 1 In the diagram, 220 is the outlet, through which fluid entering the endoscope 1000 flows into the uterine cavity; while 230 is the reflux port, through which fluid from the uterine cavity flows back into the inserter 200. Additionally, in... Figure 4 , Figure 9 and Figure 14 As an example, the positive direction of rotation of the rotating operating body 20 can be clockwise, and correspondingly, the opposite direction of rotation is counterclockwise.

[0050] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A fluid control mechanism for an endoscope, comprising a cylindrical body and a rotating operating body, wherein the rotating operating body is rotatably mounted in the internal space of the cylindrical body and is sealed to the cylindrical body, characterized in that, The cylinder is provided with a liquid inlet, a liquid inlet, a liquid return inlet, and a liquid return outlet communicating with the internal space of the cylinder. The rotating operating body is provided with a first through hole and a second through hole that are spaced apart from each other and located in the internal space. When the rotating operating body rotates relative to the cylinder to a first position or a second position, the first through hole communicates with the liquid inlet and the liquid inlet, respectively. When the rotating operating body rotates to a third position, the first through hole is disconnected from at least one of the liquid inlet and the liquid inlet. When the rotating operating body rotates to the first position or the third position, the second through hole is disconnected from at least one of the liquid return inlet and the liquid return outlet. When the rotating operating body rotates to the second position, the second through hole communicates with both the liquid return inlet and the liquid return outlet.

2. The liquid circuit control mechanism according to claim 1, characterized in that, The two ends of the first through hole extend forward and backward along the rotation direction of the rotating operating body, and the openings at both ends of the first and second through holes are located on the side of the rotating operating body.

3. The liquid circuit control mechanism according to claim 2, characterized in that, The openings at both ends of the first through hole are waist-shaped openings.

4. The liquid circuit control mechanism according to claim 2, characterized in that, The sidewall of the rotating operating body is fitted with a first sealing element and a second sealing element that are spaced apart from each other; the first sealing element is respectively arranged on the opposite sides of the opening of the first through hole, and the first sealing element also seals with the sidewall of both the cylinder and the rotating operating body; the second sealing element is respectively arranged on the opposite sides of the opening of the second through hole, and the second sealing element also seals with the sidewall of both the cylinder and the rotating operating body.

5. The hydraulic control mechanism according to claim 1, characterized in that, One of the cylinder and the rotating operating body is provided with a first limiting structure and a second limiting structure located in the internal space. The first limiting structure and the second limiting structure are arranged spaced apart from each other along the rotation direction of the rotating operating body. The rotating operating body is correspondingly provided with a matching limiting structure placed between the first limiting structure and the second limiting structure. When the rotating operating body rotates to the second position, the matching limiting structure abuts against the first limiting structure and limits the rotation. When the rotating operating body rotates to the third position, the matching limiting structure abuts against the second limiting structure and limits the rotation.

6. The liquid circuit control mechanism according to claim 5, characterized in that, The first limiting structure and the second limiting structure are located on the end wall of the cylinder or the end wall of the rotating operating body, and the corresponding limiting structure protrudes from the end wall of the rotating operating body or the end wall of the cylinder.

7. The hydraulic control mechanism according to claim 6, characterized in that, The first limiting structure and the second limiting structure are arranged in an inverted "V" shape and each is an inclined plane; the side surface of the limiting structure has a first plane and a second plane that are parallel to each other, the second plane is arranged facing the second limiting structure, and the first plane is arranged facing the first limiting structure.

8. The liquid circuit control mechanism according to claim 7, characterized in that, The first limiting structure and the second limiting structure are tangentially connected by a first cylindrical surface with a minor arc as the guideline; the side surface of the limiting structure has a second cylindrical surface with a minor arc of 90 degrees as the guideline, the second cylindrical surface is tangentially connected between the first plane and the second plane, and the second cylindrical surface also rolls with the first cylindrical surface.

9. The liquid circuit control mechanism according to claim 1, characterized in that, The rotating operating body also has a knob structure extending out of the internal space of the cylinder; when the rotating operating body is in the first position, it can be rotated to the second position along either the forward or reverse direction of the rotation direction of the rotating operating body, and when the rotating operating body is in the first position, it can be rotated to the third position along either the forward or reverse direction of the rotation direction of the rotating operating body.

10. An endoscope, comprising an insert and a fluid return mechanism assembled and connected to the tail end of the insert, characterized in that, The endoscope further includes a fluid control mechanism according to any one of claims 1 to 9.

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