Disposable convenient electronic uterine cavity imaging catheter

Abstract

The invention relates to the technical field of medical instruments, and discloses a disposable convenient electronic uterine cavity imaging catheter which comprises a handle, an intubation tube arranged at one end of the handle, a button arranged on the handle, a liquid inlet tube and a liquid outlet tube arranged at the bottom of the handle, and a control unit arranged in the handle. The control unit comprises two control parts arranged in the handle; the control component comprises a valve assembly arranged in the handle and a locking assembly arranged on one side of the valve assembly. Opening and closing of the liquid inlet pipe and the liquid outlet pipe are independently regulated and controlled by pressing the locking assembly. In actual medical operation, a doctor can accurately control liquid to flow in and out according to specific conditions in the uterine cavity, unnecessary flowing of the liquid is avoided, the infection risk is reduced, the treatment effect can be improved, and the accuracy and safety of the medical operation are improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a disposable and convenient electronic uterine cavity imaging catheter. Background Art

[0002] The disposable electronic intrauterine imaging catheter is a professional device used in the medical field, especially for intrauterine examination and treatment. It can penetrate deep into the uterine cavity and use advanced technology to obtain image information inside the uterine cavity. The front end of the handle is equipped with a lens and an LED light source. The lens is like the doctor's "eye" and can clearly capture the subtle conditions in the uterine cavity, such as the morphology of the endometrium and whether there are pathological tissues. These image information provides a key and intuitive basis for doctors to accurately diagnose intrauterine diseases, such as endometrial polyps and intrauterine adhesions.

[0003] The bottom of the existing electronic intrauterine imaging catheter handle is usually equipped with an inlet tube and an outlet tube, and has a built-in switch valve. In actual use, the doctor needs to use the other hand to independently control the switch, and often achieves the switch effect by twisting the valve. During the operation, the operation is very inconvenient, the valve switching efficiency is relatively low, and the inlet tube and the outlet tube cannot be quickly and conveniently controlled independently. Summary of the invention

[0004] In view of the existing technical problems that the electronic intrauterine imaging catheter is very inconvenient to operate during surgery, the valve switching efficiency is relatively low, and the inlet and outlet tubes cannot be quickly and conveniently controlled independently, a disposable and convenient electronic intrauterine imaging catheter is proposed.

[0005] The purpose is to independently adjust the opening and closing of the liquid inlet and outlet pipes by pressing the locking component, accurately control the inlet and outlet of the liquid, and realize fast and convenient control of the inlet and outlet of the liquid.

[0006] The technical solution of the present invention is a disposable and convenient electronic uterine cavity imaging catheter, comprising a handle, a cannula arranged at one end of the handle, a button arranged on the handle, and a liquid inlet pipe and a liquid outlet pipe arranged at the bottom of the handle, and also comprising a control unit arranged inside the handle; The control unit includes two control components arranged inside the handle; the control components include a valve assembly arranged inside the handle, and a locking assembly arranged on one side of the valve assembly; The valve assembly is used to control the inflow and outflow of liquid in the liquid inlet pipe and the liquid outlet pipe, and the locking assembly is used to squeeze and push the valve assembly to release the squeezing and blocking of the liquid inlet pipe and the liquid outlet pipe by the valve assembly; The valve assembly includes a valve plate arranged inside the handle, an extrusion hole opened on one side of the middle part of the valve plate, an extrusion groove opened on the side wall of the extrusion hole, an extrusion plate arranged at one end of the valve plate, an extrusion block arranged on one side of the extrusion plate, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged in the corresponding two extrusion holes.

[0007] Furthermore, the extrusion plate is in an arc shape, and the extrusion block is in an arc shape matching the extrusion groove.

[0008] Furthermore, the valve assembly also includes a rotation groove opened on one side of the extrusion plate, a rotation column arranged in the rotation groove, and a torsion spring arranged between the rotation column and the extrusion plate.

[0009] Furthermore, the valve assembly also includes a movable groove arranged on one side of the extrusion groove, a reset block arranged in the movable groove, and the liquid inlet pipe or the liquid outlet pipe is arranged at the middle position between the reset block and the extrusion hole, an extrusion inclined surface arranged on one side of the reset block, a reset column arranged on one side of the reset block, a reset spring arranged on one side of the reset column, and the reset spring is arranged inside the extrusion plate.

[0010] Furthermore, the locking assembly includes a button arranged on one side of the handle, a pushing rod arranged on one side of the button, a rotating head arranged at one end of the pushing rod through a torsion spring, a locking spring arranged inside one side of the rotating head, a locking rod arranged on one side of the locking spring, the locking rod movably arranged inside the rotating head, an extrusion rod arranged at the top of the pushing rod, and the extrusion rod abuts against the back side of the extrusion plate, a mounting block arranged inside the handle, and an unlocking slot group opened on one side of the mounting block, and the locking rod is movably located in the unlocking slot group.

[0011] Furthermore, the unlocking groove group includes a sliding groove opened on one side of the mounting block, a clamping groove opened on one side of the sliding groove, a rotating arc surface arranged on one side of the clamping groove, a convex edge arranged at the end of the clamping groove, a reset groove arranged on one side of the convex edge, and a reset arc surface opened on the other side of the reset groove and smoothly connected to the sliding groove.

[0012] Furthermore, an arc-shaped sliding hole is provided on a side of the valve plate opposite to the extrusion hole.

[0013] Furthermore, two limit plates for limiting the horizontal position of the liquid inlet pipe and the liquid outlet pipe are arranged inside the handle, and the liquid inlet pipe and the liquid outlet pipe pass through the middle of the limit plates.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By pressing the locking component, the opening and closing of the inlet and outlet tubes can be independently controlled. In actual medical operations, doctors can accurately control the inflow and outflow of liquids according to the specific conditions in the uterine cavity, such as the need for flushing and injection. This precise control avoids unnecessary flow of liquids, reduces the risk of infection, improves the treatment effect, and improves the accuracy and safety of medical operations.

[0015] 2. The clever design of the torsion spring enables the extrusion plate to automatically reset and open the pipe after completing the extrusion and plugging. This automatic reset function saves medical staff time and energy in manual operation during multiple liquid inlet and outlet operations, and improves work efficiency. Moreover, the stable automatic reset mechanism ensures the consistency of each operation and reduces the possibility of human error.

[0016] 3. The reset block, reset column and reset spring provide comprehensive protection for the liquid inlet pipe. When the liquid inlet pipe is squeezed, they avoid premature aging and damage caused by multi-directional forces on the liquid inlet pipe, extend the service life of the liquid inlet pipe, and reduce replacement costs. At the same time, when the liquid inlet pipe returns to its original state, these structures can help it recover quickly, allowing the liquid to quickly reach the maximum flow rate, ensuring the efficient operation process.

[0017] 4. The front end of the handle is equipped with an advanced CMOS lens and a dual LED light source, which has millions of pixels and clear imaging to meet clinical needs. The button has the function of an integrated button on the handle to achieve photo taking and video recording at the handle end, improving ease of use. The control unit can independently control whether the inlet and outlet tubes are closed, making operation easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the handle of the present invention after partial cross-section; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the control unit of the present invention; Figure 4 It is a schematic diagram of the overall front view structure of the control unit of the present invention; Figure 5 It is a schematic diagram of the overall structure of a single control component of the present invention; Figure 6 It is a schematic diagram of the overall exploded structure of the valve assembly of the present invention; Figure 7 It is a schematic diagram of the overall exploded structure of the locking assembly of the present invention; Figure 8 It is an enlarged structural schematic diagram of the unlocking groove group as a whole of the present invention; Fig. 9The figure is a schematic diagram of the rotating state structure of the rotating head and the locking rod of the present invention during the unlocking and resetting process.

[0019] In the figure: 1. Handle; 2. Insertion tube; 3. Button; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Valve plate; 7. Extrusion hole; 8. Extrusion groove; 9. Extrusion plate; 10. Extrusion block; 11. Rotation groove; 12. Rotation column; 13. Movable groove; 14. Reset block; 15. Extrusion slope; 16. Reset column; 17. Reset spring; 18. Button; 19. Push rod; 20. Rotation head; 21. Locking spring; 22. Locking rod; 23. Extrusion rod; 24. Mounting block; 25. Sliding groove; 26. Clamping groove; 27. Rotation arc surface; 28. Convex edge; 29. ​​Reset groove; 30. Reset arc surface; 31. Sliding hole; 32. Limit plate. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] Example 1, reference Figure 1-Figure 9 , which is the first embodiment of the present invention, provides a disposable and convenient electronic uterine cavity imaging catheter, comprising a handle 1, a cannula 2 installed at one end of the handle 1, a button 3 installed on the handle 1, and a liquid inlet pipe 4 and a liquid outlet pipe 5 installed at the bottom of the handle 1, and also includes a control unit installed inside the handle 1; the control unit includes two control components installed inside the handle 1; the control component includes a valve assembly installed inside the handle 1, and a locking assembly installed on one side of the valve assembly; the valve assembly is used to control the inlet and outlet of liquid in the liquid inlet pipe 4 and the liquid outlet pipe 5, and the locking assembly is used to squeeze and push the valve assembly to release the extrusion and blocking of the liquid inlet pipe 4 and the liquid outlet pipe 5 by the valve assembly; the valve assembly includes a valve plate 6 fixedly connected to the inside of the handle 1, an extrusion hole 7 provided on one side of the middle part of the valve plate 6, an extrusion groove 8 provided on the side wall of the extrusion hole 7, an extrusion plate 9 rotatably connected to one end of the valve plate 6, and an extrusion block 10 fixedly connected to one side of the extrusion plate 9, and the liquid inlet pipe 4 and the liquid outlet pipe 5 are respectively arranged in the corresponding two extrusion holes 7.

[0022] Specifically, the front end of the handle 1 is equipped with a CMOS lens and a dual LED light source, which has a million pixels and clear imaging to meet clinical needs. The button 3 has the function of the integrated button 18 of the handle 1, which can realize the photo taking and video recording of the handle 1 end, and improve the convenience of use. The control unit can independently control whether the inlet pipe 4 and the outlet pipe 5 are closed, and the operation is convenient. When it is used specifically, when it is necessary to control the switch of the inlet pipe 4 or the outlet pipe 5, the independent adjustment of the inlet and outlet can be achieved by pressing the locking assembly independently. When the locking assembly is pressed, the valve assembly is pushed, so that the extrusion plate 9 is pushed and rotated, and the extrusion block 10 squeezes the inlet pipe 4, so that the inlet pipe 4 is squeezed into the extrusion groove 8. Since the extrusion groove 8 and the extrusion block 10 match, the inlet pipe 4 can be squeezed and deformed and then bent, thereby realizing the blocking of the inlet pipe 4. The inlet pipe 4 and the outlet pipe 5 are both rubber tubes that can be deformed. The extrusion hole 7 is used to limit the inlet pipe 4, which is convenient for the precise extrusion of the extrusion block 10.

[0023] Reference Figure 5-Figure 6 The extrusion plate 9 is in an inferior arc shape, and the extrusion block 10 is in an arc shape matching the extrusion groove 8.

[0024] Specifically, the inferior arc-shaped extrusion plate 9 allows the extrusion plate 9 to be pushed and rotated when the locking assembly is pushed and squeezed at its back position, and the extrusion block 10 and the extrusion groove 8 are both in matching arc shapes, thereby achieving complete blocking of the liquid inlet pipe 4 after squeezing. When the extrusion block 10 is driven by the extrusion plate 9 to reset and rotate, the liquid inlet pipe 4 tends to return to its original state, so that the liquid in the liquid inlet pipe 4 can flow smoothly, thereby achieving control over the liquid in the liquid inlet pipe 4.

[0025] Reference Figure 6 The valve assembly also includes a rotation groove 11 opened on one side of the extrusion plate 9, a rotation column 12 fixedly connected to the rotation groove 11, and a torsion spring abutting between the rotation column 12 and the extrusion plate 9 (the torsion spring has a torsion and reset function, which is not shown in the figure, and the same applies to the following).

[0026] Specifically, when the extrusion plate 9 is pushed to rotate, the torsion spring between the extrusion plate 9 and the rotating column 12 will be twisted to store force. When the extrusion plate 9 stops being pushed, under the restoring force of the torsion spring, the extrusion plate 9 will reset and rotate, thereby realizing automatic opening of the liquid inlet pipe 4.

[0027] Reference Figure 1-Figure 6 The valve assembly also includes a movable groove 13 opened on one side of the extrusion groove 8, a reset block 14 slidably connected in the movable groove 13, and the liquid inlet pipe 4 or the liquid outlet pipe 5 is arranged at the middle position between the reset block 14 and the extrusion hole 7, an extrusion inclined surface 15 opened on one side of the reset block 14, a reset column 16 fixedly connected to one side of the reset block 14, a reset spring 17 fixedly connected to one side of the reset column 16, and the reset spring 17 is fixedly connected to the inside of the extrusion plate 9.

[0028] Specifically, when the extrusion plate 9 is rotating during extrusion, the oblique edge of the extrusion block 10 will first push the extrusion oblique surface 15, so that the entire reset block 14 will shrink into the movable groove 13. After the reset block 14 is pushed, the extrusion block 10 will squeeze the liquid inlet pipe 4. Since the extruded surface of the liquid inlet pipe 4 will become flat and concave when it is squeezed, and the folded sides on both sides will fold and extend to both sides, the above design can avoid the two folded sides of the liquid inlet pipe 4 from being blocked and squeezed by the reset block 14 when extending, which can ensure the smooth extension of the folded side of the liquid inlet pipe 4, and avoid the folded side of the liquid inlet pipe 4 from being squeezed when the extrusion surface is squeezed and deformed, thereby preventing the liquid inlet pipe 4 from being subjected to multi-directional force and aging and damage caused by long-term extrusion. It not only improves the sealing of the liquid inlet pipe 4, but also improves the service life of the liquid inlet pipe 4, thereby improving the service life of the entire device, as well as the stability and safety. When the squeezing block 10 stops squeezing the squeezing surface of the liquid inlet tube 4, the liquid inlet tube 4 will tend to deform and return to its original shape. However, due to the long-term squeezing, the folded sides on both sides thereof cannot quickly and completely return to the cylindrical shape of the liquid inlet tube 4. The reset spring 17 will push the reset block 14 to squeeze and push the liquid inlet tube 4 during resetting, so that the liquid inlet tube 4 can quickly return to its original shape, so that the liquid inside the liquid inlet tube 4 can smoothly and quickly reach the maximum flow rate, and can ensure that the folded sides of the liquid inlet tube 4 always maintain the balance and stability between the compression deformation and the deformation recovery.

[0029] Example 2, reference Figure 1-Figure 4 and Figure 7-Figure 9 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the locking assembly includes a button 18 that is limitedly slidably connected to one side of the handle 1, and the two buttons 18 are stepped to facilitate the doctor to press them separately, a pushing rod 19 fixedly connected to one side of the button 18, a rotating head 20 that is rotationally connected to one end of the pushing rod 19 through a torsion spring, a locking spring 21 fixedly connected to the inside of one side of the rotating head 20, a locking rod 22 fixedly connected to one side of the locking spring 21, the locking rod 22 is slidably connected to the inside of the rotating head 20, an extrusion rod 23 fixedly connected to the top of the pushing rod 19, and the extrusion rod 23 abuts against the back side of the extrusion plate 9, a mounting block 24 fixedly connected to the inside of the handle 1, and an unlocking slot group opened on one side of the mounting block 24, and the locking rod 22 is located in the unlocking slot group and moves.

[0030] Specifically, the locking assembly is used to achieve locking and unlocking of the valve assembly. When the medical staff presses the button 18, the button 18 will drive the push rod 19 to move, and the moving rod will simultaneously drive the extrusion rod 23 to move, so that the extrusion rod 23 squeezes and pushes the extrusion plate 9, thereby achieving the extrusion plate 9 driving the extrusion block 10 to squeeze and seal the liquid inlet pipe 4. In the initial state, the back positions of the extrusion rod 23 and the extrusion plate 9 are in abutment. In the process of pressing the button 18, the locking rod 22 in the rotating head 20 will move in the unlocking groove group, achieving the abutment locking and sliding reset unlocking of the locking rod 22.

[0031] Reference Figure 8 The unlocking groove group includes a sliding groove 25 opened on one side of the mounting block 24, a clamping groove 26 opened on one side of the sliding groove 25, a rotating arc surface 27 opened on one side of the clamping groove 26, a convex edge 28 fixedly connected to the end of the clamping groove 26, a reset groove 29 opened on one side of the convex edge 28, and a reset arc surface 30 opened on the other side of the reset groove 29 and smoothly connected to the sliding groove 25.

[0032] Specifically, when the push rod 19 is pushed and moved, the rotating head 20 and the locking rod 22 therein are synchronously pushed and moved, so that the locking rod 22 moves in the sliding groove 25. When it moves into the engaging groove 26, under the action of the locking spring 21, the locking rod 22 is engaged in the engaging groove 26. At this time, the squeezing plate 9 is squeezed and rotated to squeeze and block the liquid inlet pipe 4, and under the reverse squeezing force of the squeezing plate 9, the locking rod 22 is firmly locked in the engaging groove 26. When the liquid inlet pipe 4 is unblocked, the button 18 is pressed again to make the push rod 19 continue to move. At this time, the locking rod 22 slides along the rotating arc surface 27, so that the locking rod 22 drives the rotating head 20 to rotate obliquely upward by twisting the torsion spring. When it reaches the convex edge 28, the locking rod 22 presses The locking spring 21 is compressed so that the locking rod 22 can turn over the convex edge 28 and enter the reset groove 29. At this time, the locking rod 22 extends under the reset action of the locking spring 21, and slides in the reset groove 29 with an inclined abutment. At this time, the pressing of the button 18 is stopped, and under the reset force of the torsion spring at the extrusion plate 9, the extrusion rod 23 is automatically pushed backward, so that the rotating head 20 and the locking rod 22 are reset and moved synchronously, and under the action of the reset arc surface 30, the torsion spring inside the rotating head 20 drives the rotating head 20 to reset and rotate on the reset arc surface 30, so that the locking rod 22 rotates to the initial state again. At this point, the complete push-lock and push-reset functions are realized, the structure is simple, the operation is convenient, and the practicality of locking and unlocking is high.

[0033] Reference Figure 5-Figure 6 An arc-shaped sliding hole 31 is provided on the side of the valve plate 6 opposite to the extrusion hole 7.

[0034] Specifically, the design of the arc-shaped sliding hole 31 facilitates slight expansion and contraction of the liquid inlet pipe 4 and the liquid outlet pipe 5 when they are squeezed and blocked, thereby avoiding damage to the tube walls of the liquid inlet pipe 4 and the liquid outlet pipe 5 and reducing the friction of their expansion and contraction.

[0035] Reference Figure 2 Two limit plates 32 for limiting the horizontal position of the liquid inlet pipe 4 and the liquid outlet pipe 5 are fixedly connected inside the handle 1, and the liquid inlet pipe 4 and the liquid outlet pipe 5 pass through the middle of the limit plates 32.

[0036] Specifically, the limiting plate 32 is used to limit the horizontal position of the liquid inlet pipe 4 and the liquid outlet pipe 5 to prevent them from bending, which is convenient for installation and blocking. The rest of the structure is the same as that of the first embodiment.

[0037] Based on Examples 1-2, the working principle of the present invention is as follows: by pressing the locking assembly, the extrusion plate 9 in the valve assembly is pushed to rotate, and the extrusion block 10 on the extrusion plate 9 squeezes the liquid inlet pipe 4 or the liquid outlet pipe 5 into the extrusion groove 8, so that it is bent and blocked, and the independent control of the liquid inlet and the liquid outlet is realized. The operation is extremely convenient, and the flow of the liquid can be precisely regulated. At the same time, when the extrusion plate 9 rotates, the torsion spring connected thereto accumulates force. After the pressing stops, the torsion spring resets and drives the extrusion plate 9 to rotate back, automatically opening the pipeline. In addition, structures such as the reset block 14, the reset column 16, and the reset spring 17 can prevent the liquid inlet pipe 4 from being subjected to multi-directional forces when it is squeezed, extend its service life, and help the liquid inlet pipe 4 to quickly return to its original state, ensuring that the liquid quickly reaches the maximum flow rate. The locking rod 22 in the locking assembly moves in the unlocking groove group to realize pressing to lock and pressing to unlock again. The structure is simple, and the convenience and practicality of operation are improved.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A disposable and convenient electronic uterine cavity imaging catheter, comprising a handle, a cannula arranged at one end of the handle, a button arranged on the handle, and a liquid inlet pipe and a liquid outlet pipe arranged at the bottom of the handle, characterized in that: Also included is a control unit disposed inside the handle; The control unit includes two control components arranged inside the handle; the control components include a valve assembly arranged inside the handle, and a locking assembly arranged on one side of the valve assembly; The valve assembly is used to control the inflow and outflow of liquid in the liquid inlet pipe and the liquid outlet pipe, and the locking assembly is used to squeeze and push the valve assembly to release the squeezing and blocking of the liquid inlet pipe and the liquid outlet pipe by the valve assembly; The valve assembly includes a valve plate arranged inside the handle, an extrusion hole opened on one side of the middle part of the valve plate, an extrusion groove opened on the side wall of the extrusion hole, an extrusion plate arranged at one end of the valve plate, an extrusion block arranged on one side of the extrusion plate, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged in the corresponding two extrusion holes.

2. The disposable and convenient electronic uterine cavity imaging catheter according to claim 1, characterized in that: The extrusion plate is in an inferior arc shape, and the extrusion block is in an arc shape matching the extrusion groove.

3. The disposable and convenient electronic uterine cavity imaging catheter according to claim 1, characterized in that: The valve assembly also includes a rotation groove opened on one side of the extrusion plate, a rotation column arranged in the rotation groove, and a torsion spring arranged between the rotation column and the extrusion plate.

4. The disposable and convenient electronic uterine cavity imaging catheter according to claim 1, characterized in that: The valve assembly also includes a movable groove arranged on one side of the extrusion groove, a reset block arranged in the movable groove, and a liquid inlet pipe or a liquid outlet pipe arranged at a middle position between the reset block and the extrusion hole, an extrusion inclined surface arranged on one side of the reset block, a reset column arranged on one side of the reset block, a reset spring arranged on one side of the reset column, and the reset spring is arranged inside the extrusion plate.

5. The disposable and convenient electronic uterine cavity imaging catheter according to claim 1, characterized in that: The locking assembly includes a button arranged on one side of the handle, a pushing rod arranged on one side of the button, a rotating head arranged at one end of the pushing rod through a torsion spring, a locking spring arranged inside one side of the rotating head, a locking rod arranged on one side of the locking spring, the locking rod movably arranged inside the rotating head, an extrusion rod arranged on the top of the pushing rod, and the extrusion rod abuts against the back side of the extrusion plate, a mounting block arranged inside the handle, and an unlocking slot group opened on one side of the mounting block, and the locking rod is movably located in the unlocking slot group.

6. The disposable and convenient electronic uterine cavity imaging catheter according to claim 5, characterized in that: The unlocking groove group includes a sliding groove opened on one side of the mounting block, a clamping groove opened on one side of the sliding groove, a rotating arc surface arranged on one side of the clamping groove, a convex edge arranged at the end of the clamping groove, a reset groove arranged on one side of the convex edge, and a reset arc surface opened on the other side of the reset groove and smoothly connected to the sliding groove.

7. The disposable and convenient electronic uterine cavity imaging catheter according to claim 1, characterized in that: An arc-shaped sliding hole is provided on one side of the valve plate opposite to the extrusion hole.

8. The disposable and convenient electronic uterine cavity imaging catheter according to claim 1, characterized in that: Two limit plates for limiting the horizontal position of the liquid inlet pipe and the liquid outlet pipe are arranged inside the handle, and the liquid inlet pipe and the liquid outlet pipe pass through the middle of the limit plates.

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