Medical three-way switch and cyst treatment instrument

Abstract

The application provides a medical tee switch and a cyst treatment device, which comprises a top base, a bottom base, a clamping hook, a suction stop component, an injection stop component, a negative pressure connection component and a positive pressure connection component. The top base is provided with an injection channel, a suction channel and a common channel which are connected with each other. The top base is also provided with an injection hole penetrating through the injection channel and a suction hole penetrating through the suction channel. The bottom base is connected with the top base and is provided with a positive pressure cavity and a negative pressure cavity which are isolated from each other. The clamping hook semi-surrounds the top base and the bottom base. The suction stop component is assembled in the suction hole and extends to the suction channel. The injection stop component is assembled in the injection hole and extends to the injection channel. The negative pressure connection component is assembled in the negative pressure cavity and is inserted into the suction channel. The negative pressure connection component is connected with the suction stop component and is used for driving the suction stop component to rotate. The positive pressure connection component is assembled in the positive pressure cavity and is inserted into the injection channel. The positive pressure connection component is connected with the injection stop component and is used for driving the injection stop component to rotate.

Description

Technical Field

[0001] This invention relates to the technical field of medical three-way switchers, specifically a medical three-way switcher and a cyst treatment device. Background Technology

[0002] Epidemiological studies show that various nodules or tumors are very common in clinical practice. The treatment process for these diseases generally involves first ablating the lesion, followed by alternating injections and extractions of saline solution. During the treatment of the lesion, the infusion and extraction of fluids occur through the same tubing, causing secondary contamination. Summary of the Invention

[0003] The purpose of this invention is to provide a medical three-way switch and a cyst treatment device to solve the problem of contamination caused by sharing the same pipe during lesion treatment.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a medical three-way switch, comprising: a top seat, a base, a hook, a suction stop assembly, an injection stop assembly, a negative pressure connection assembly, and a positive pressure connection assembly. The top seat has an injection channel, an aspiration channel, and a common channel that are interconnected. The top seat also has an injection hole that penetrates the injection channel and an aspiration hole that penetrates the aspiration channel. The base is connected to the top seat and has a positive pressure chamber and a negative pressure chamber that are isolated from each other. The hook partially surrounds the top seat and the base. The suction stop assembly is assembled in the aspiration hole and extends to the aspiration channel. The suction stop assembly is used for... The system includes components for blocking the suction channel and the common channel; an injection stop assembly is installed in the injection port and extends into the injection channel, used to block the injection channel and the common channel; a negative pressure connection assembly is installed in the negative pressure chamber and inserted into the suction channel, connected to the suction stop assembly, used to drive the suction stop assembly to rotate, thereby opening the suction channel and the common channel; and a positive pressure connection assembly is installed in the positive pressure chamber and inserted into the injection channel, connected to the injection stop assembly, used to drive the injection stop assembly to rotate, thereby opening the injection channel and the common channel.

[0005] Optionally, the positive pressure chamber includes a positive auxiliary chamber, a positive functional chamber, and a positive connecting chamber, with the positive connecting chamber connecting the positive auxiliary chamber and the positive functional chamber. The positive pressure connecting assembly includes a positive pressure piston, a positive connecting rod, a positive transition piston, a positive helical gear, a positive screw piston, and a positive return spring. The top seat extends toward the base to form a positive motion chamber communicating with the injection channel. The positive pressure piston is placed in the positive motion chamber, the positive transition piston is placed in the positive auxiliary chamber, the positive connecting rod connects the positive pressure piston and the positive transition piston respectively, the positive motion chamber and the positive auxiliary chamber are connected, the positive helical gear is assembled in the injection hole and meshes with the injection stop assembly, the positive screw piston is placed in the positive functional chamber and threadedly connected to the positive helical gear, and the positive return spring is connected to the positive screw piston and one end of the base facing the top seat respectively.

[0006] Optionally, the positive helical gear has a positive threaded hole inside, and the positive helical gear has a positive rack outside that meshes with the injection stop assembly. The positive screw piston includes a positive piston part and a positive screw part connected to the positive piston part. The positive piston part is located in the positive function cavity, and the positive screw part has a threaded structure and is threadedly connected to the positive threaded hole. The positive return spring is connected to the positive piston part and sleeved on the positive screw part.

[0007] Optionally, the injection stop assembly includes an injection valve core that meshes with a spur rack. The injection valve core includes an injection truncated cone and an injection valve part connected to the injection truncated cone. The injection truncated cone has an internal injection tooth groove that meshes with the spur rack. The injection valve part has a transverse injection passage groove for liquid flow.

[0008] Optionally, the injection stop assembly also includes an injection stop ring, around which a positive helical gear is wound, and the injection truncated cone presses the injection stop ring onto the top seat.

[0009] Optionally, the medical three-way switch also includes an indicator component, which includes a knob, a lever, and a rotating gear. The knob is located on the outside of the top seat, one end of the lever is connected to the knob, and the other end is connected to the rotating gear. The outer periphery of the truncated cone is provided with rotating teeth that mesh with the rotating gear.

[0010] Optionally, the negative pressure chamber includes a negative auxiliary chamber, a negative functional chamber, and a negative connecting chamber, with the negative connecting chamber connecting the negative auxiliary chamber and the negative functional chamber. The negative pressure connecting assembly includes a negative pressure piston, a negative connecting rod, a negative transition piston, a negative helical gear, a negative screw piston, and a negative return spring. The top seat extends away from the base to form a negative motion chamber communicating with the liquid suction channel. The negative motion chamber has a vent. The negative pressure piston is placed in the negative motion chamber, the negative transition piston is placed in the negative auxiliary chamber, the negative connecting rod connects the negative pressure piston and the negative transition piston respectively, the negative helical gear is assembled in the suction hole and meshes with the suction stop assembly, the negative screw piston is placed in the negative functional chamber and threadedly connected to the negative helical gear, and the negative return spring is connected to the negative screw piston and the end of the base facing the top seat respectively.

[0011] Optionally, the negative helical gear has a negative threaded hole inside, and a negative rack that meshes with the suction stop assembly is provided on the outside of the negative helical gear. The negative screw piston includes a negative piston part and a negative screw part connected to the negative piston part. The negative piston part is located in the negative functional cavity, and the negative screw part has a threaded structure and is threadedly connected to the negative threaded hole. The negative return spring is connected to the negative piston part and sleeved on the negative screw part.

[0012] Optionally, the suction stop assembly includes a suction valve core that meshes with a negative rack. The suction valve core includes a suction frustum and a suction valve part connected to the suction frustum. The suction frustum has an internal suction tooth groove that meshes with the negative rack, and the suction valve part has a transverse suction passage groove for liquid flow.

[0013] To achieve the above objectives, the present invention provides the following technical solution: a cyst treatment device, which includes any of the cyst treatment devices described above.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] This medical three-way switch integrates an injection channel, a suction channel, and a common channel. The common channel connects to the needle, the injection channel connects to the infusion setter containing medical fluid, and the suction channel connects to the suction setter. When the infusion setter is operating, the suction channel is closed, and the infusion setter injects medical fluid through the needle; when the suction setter is operating, the injection channel is closed, and the suction setter aspirates waste fluid through the needle. Therefore, the medical three-way switchter achieves automatic switching and independent operation of injection and suction functions. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the medical three-way switch provided by the present invention;

[0017] Figure 2 This is an exploded view of the medical three-way switch provided by the present invention;

[0018] Figure 3 This invention provides Figure 1 A schematic diagram of the cross-section along the AA direction;

[0019] Figure 4 This invention provides Figure 1 A schematic diagram of the cross-section along the BB direction.

[0020] Top seat 10, injection channel 11, suction channel 12, common channel 13, base 20

[0021] Positive pressure chamber 21, positive auxiliary chamber 24, positive functional chamber 26, positive connecting chamber 28

[0022] Negative pressure chamber 22, negative auxiliary chamber 23, negative functional chamber 25, negative connecting chamber 27

[0023] Hook 30, suction stop assembly 40, suction valve core 41, suction frustum 43, suction valve part 44

[0024] Suction internal tooth groove 45, suction through groove 46, suction stop ring 42, injection stop assembly 50

[0025] Inject valve core 51, inject truncated cone 53, inject valve part 54, inject internal tooth groove 55, inject through groove 56

[0026] 52. Retaining ring; 60. Negative pressure connecting component; 61. Negative pressure piston; 62. Negative connecting rod; 63. Negative transition piston.

[0027] Negative helical gear 64, negative threaded hole 66, negative rack 67, negative screw piston 65

[0028] Negative piston part 68, negative screw part 69, negative return spring 601, positive pressure connecting assembly 70

[0029] Positive pressure piston 71, positive connecting rod 72, positive transition piston 73, positive helical gear 74

[0030] 76. Positive threaded hole; 77. Positive rack; 75. Positive screw piston; 78. Positive piston section; 79. Positive screw section

[0031] Return spring 701, indicator assembly 80, knob 81, lever 82, rotating gear 83 Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Please see Figures 1 to 3 , Figure 1 This is a three-dimensional structural diagram of the medical three-way switch provided by the present invention. Figure 2 This is an exploded view of the medical three-way switch provided by the present invention. Figure 3 This invention provides Figure 1 A schematic diagram of the cross section along the AA direction.

[0038] This invention provides a medical three-way switch, which integrates an injection channel 11, an aspiration channel 12, and a common channel 13. The common channel 13 is used to connect to a needle, the injection channel 11 is used to connect to an infusion device containing medical fluid, and the aspiration channel 12 is used to connect to an aspirator. When the infusion device is working, the aspiration channel 12 is closed, and the infusion device injects medical fluid through the needle; when the aspirator is working, the injection channel 11 is closed, and the aspirator aspirates waste fluid through the needle. Therefore, the medical three-way switch realizes automatic switching and independent operation of injection and aspiration.

[0039] Specifically, the medical three-way switch includes a top seat 10, a base 20, a hook 30, a suction stop assembly 40, an injection stop assembly 50, a negative pressure connection assembly 60, and a positive pressure connection assembly 70. The top seat 10 has interconnected injection channels 11, suction channels 12, and a common channel 13. The top seat 10 also has an injection hole that penetrates the injection channel 11 and a suction hole that penetrates the suction channel 12. The base 20 is connected to the top seat 10 and has mutually isolated positive pressure chambers 21 and negative pressure chambers 22. The hook 30 partially surrounds the top seat 10 and the base 20, enabling a detachable connection between the top seat 10 and the base 20. The base 20 is reusable, while the top seat 10 is disposable and needs to be replaced each time. The suction stop assembly 40 is installed in the suction hole and extends to the suction channel 12. The injection stop assembly 50 is installed in the injection hole and extends to the injection channel 11. The negative pressure connection assembly 60 is installed in the negative pressure chamber 22. The negative pressure connecting component 60 is inserted into the suction channel 12 and connected to the suction stop component 40. The negative pressure connecting component 60 is used to drive the suction stop component 40 to rotate. The angle of rotation of the suction stop component 40 can be 45 degrees, 60 degrees, 90 degrees, etc., to eliminate the obstruction of the connection between the suction channel 12 and the common channel 13 by the suction stop component 40. Under normal circumstances, the suction stop component 40 blocks the connection between the suction channel 12 and the common channel 13. The positive pressure connecting component 70 is assembled in the positive pressure chamber 21 and inserted into the injection channel 11. The positive pressure connecting component 70 is connected to the injection stop component 50 and is used to drive the injection stop component 50 to rotate. The angle of rotation of the injection stop component 50 can be 45 degrees, 60 degrees, 90 degrees, etc., to eliminate the obstruction of the connection between the injection stop component 50 and the injection stop component 11. Under normal circumstances, the injection stop component 50 blocks the connection between the injection channel 11 and the common channel 13.

[0040] To enable those skilled in the art to further understand the technical solution of the present invention, the following will explain the specific implementation process, but this does not limit the technical solution of the present invention in any way.

[0041] 1. The injector injects medical fluid into the injection channel 11. Because the injection channel 11 is blocked by the injection stop assembly 50, the pressure in the injection channel 11 increases. The positive pressure connection assembly 70 moves towards the base 20 and further drives the injection stop assembly 50 to rotate. The injection stop assembly 50 opens the injection channel 11 and the common channel 13, and the injector injects medical fluid normally through the common channel 13.

[0042] 2. After the injection of medical fluid is completed, the pressure in the injection channel 11 returns to normal. The positive pressure connection component 70 moves in the original direction by its own deformation capacity or by reverse atmospheric pressure. The positive pressure connection component 70 drives the injection stop component 50 to rotate in the opposite direction. The injection stop component 50 blocks the connection between the injection channel 11 and the common channel 13.

[0043] 3. The suction device draws air into the suction channel 12. Because the suction channel 12 is blocked by the suction stop assembly 40, the pressure in the suction channel 12 is reduced. The negative pressure connection assembly 60 moves towards the base 20 and further drives the suction stop assembly 40 to rotate. The suction stop assembly 40 opens the suction channel 12 and the common channel 13, and the suction device normally draws waste liquid through the common channel 13.

[0044] 4. After the work of sucking up waste liquid is completed, the pressure in the suction channel 12 returns to normal. The negative pressure connection component 60 moves in the original direction by its own deformation capacity or reverse atmospheric pressure. The negative pressure connection component 60 drives the suction stop component 40 to rotate in the opposite direction. The suction stop component 40 blocks the connection between the suction channel 12 and the common channel 13.

[0045] The following will explain the structural principles of the top seat 10, base 20, hook 30, suction stop assembly 40, injection stop assembly 50, negative pressure connection assembly 60, and positive pressure connection assembly 70 one by one.

[0046] The positive pressure chamber 21 includes a positive auxiliary chamber 24, a positive functional chamber 26, and a positive connecting chamber 28, with the positive connecting chamber 28 connecting the positive auxiliary chamber 24 and the positive functional chamber 26. The positive pressure connecting assembly 70 includes a positive pressure piston 71, a positive connecting rod 72, a positive transition piston 73, a positive helical gear 74, a positive screw piston 75, and a positive return spring 701. The top seat 10 extends toward the base 20 to form a positive motion chamber communicating with the injection channel 11. The positive pressure piston 71 is placed in the positive motion chamber, the positive transition piston 73 is placed in the positive auxiliary chamber 24, the positive connecting rod 72 connects the positive pressure piston 71 and the positive transition piston 73 respectively, the positive motion chamber and the positive auxiliary chamber 24 are connected, the positive helical gear 74 is assembled in the injection hole and meshes with the injection stop assembly 50, the positive screw piston is placed in the positive functional chamber 26 and threadedly connected to the positive helical gear 74, and the positive return spring 701 is connected to the positive screw piston and one end of the base 20 facing the top seat 10 respectively. The positive pressure piston 71 moves towards the base 20 under pressure. The positive pressure piston 71 drives the positive transition piston 73 to move through the positive connecting rod 72. The positive transition piston 73 compresses the positive auxiliary chamber 24. The positive auxiliary chamber 24 transmits the pressure to the positive functional chamber 26 through the positive connecting chamber 28. The positive functional chamber 26 applies the pressure to the positive screw piston 75. The positive screw piston 75 moves upward. At this time, the positive return spring 701 is compressed. Because the positive screw piston 75 and the positive helical gear 74 are threadedly connected, the positive helical gear 74 will rotate. The positive helical gear 74 further drives the injection stop assembly 50 to rotate. After the infusion device stops injecting medical fluid, the pressure on the positive pressure piston 71 disappears, the positive return spring 701 returns to its original deformation, drives the positive screw piston to move in the opposite direction, the positive helical gear 74 is driven to rotate in the opposite direction by the positive screw piston, further causing the stop assembly 50 to rotate in the opposite direction. In addition, the reverse movement of the positive screw piston will compress the air in the positive function chamber 26, and the air is transmitted to the positive auxiliary chamber 24 through the positive connecting chamber 28, thereby driving the positive pressure piston 71 and the positive transition piston 73 to reset.

[0047] The positive helical gear 74 has a positive threaded hole 76 inside, and a positive rack 77 that meshes with the injection stop assembly 50 is provided on the outside of the positive helical gear 74. The positive screw piston 75 includes a positive piston part 78 and a positive screw part 79 connected to the positive piston part 78. The positive piston part 78 is disposed in the positive function chamber 26. The positive piston part 78 is used to be squeezed or actively compressed by the air in the positive function chamber 26. The positive screw part 79 has a threaded structure and is threadedly connected to the positive threaded hole 76. When the positive screw part 79 moves up or down, it will drive the positive helical gear 74 to rotate through the threaded connection with the positive threaded hole 76. The positive helical gear 74 drives the injection stop assembly 50 to rotate through the positive rack 77. The positive return spring 701 is connected to the positive piston part 78 and sleeved on the positive screw part 79. The positive screw part 79 supports the positive return spring 701, ensuring that the positive return spring 701 always moves in the extension direction of the positive screw part 79.

[0048] The injection stop assembly 50 includes an injection valve core 51 that meshes with a spur rack 77. The injection valve core 51 includes an injection frustum 53 and an injection valve part 54 connected to the injection frustum 53. The injection frustum 53 has an internal injection groove 55 that meshes with the spur rack 77. The spur rack 77 and the internal injection groove 55 work together to drive the injection frustum 53 to rotate, which in turn drives the injection valve part 54 to rotate. The injection valve part 54 has a transverse injection passage 56 for allowing liquid to flow. When the injection valve part 54 rotates a certain angle, the injection passage 56 connects to the injection channel 11 and the common channel 13, respectively, thereby keeping the injection channel 11 and the common channel 13 unobstructed. Under normal circumstances, the part of the injection valve part 54 not equipped with the injection passage 56 is aligned with the injection channel 11 and the common channel 13, thus achieving the purpose of isolating the injection channel and the common channel 13.

[0049] The injection stop assembly 50 also includes an injection stop ring 52, around which a spur helical gear 74 is wound. An injection frustum 53 presses the injection stop ring 52 onto the top seat 10. The injection stop ring 52 serves to seal the gap between the spur helical gear 74 and the top seat 10, preventing liquid on the top seat 10 from overflowing through the spur helical gear 74 into the base 20 and thus contaminating it. The injection stop ring 52 can be made of silicone or foam.

[0050] In one embodiment, the medical three-way switch further includes an indicator component 80, which indicates that the injection channel 11 and the common channel 13 are connected. Specifically, the indicator component 80 includes a knob 81, a lever 82, and a rotating gear 83. The knob 81 is located on the outside of the top seat 10 and can be in a straight line or a cross shape. One end of the lever 82 is connected to the knob 81, and the other end is connected to the rotating gear 83. The outer periphery of the injection truncated cone 53 has rotating teeth that mesh with the rotating gear 83. When the injection truncated cone 53 rotates, it drives the rotating gear 83 to rotate through the rotating teeth. The rotating gear 83 further drives the knob 81 to rotate through the lever 82, so that the injection valve core 51 and the knob 81 rotate synchronously, thereby indicating that the injection channel 11 and the common channel 13 are connected.

[0051] The latch 30 may include a first plate, a second plate, a third plate, a fourth plate, and a fifth plate that are bent and connected in sequence. The third plate abuts against the base 20, the second plate abuts against both the base 20 and the top seat 10, the fourth plate abuts against both the base 20 and the top seat 10, the first plate abuts against the top seat 10, and the fifth plate abuts against the top seat 10. Thus, the first, second, third, fourth, and fifth plates together partially surround the top seat 10 and the base 20, allowing the top seat 10 and the base 20 to be detachably connected. The number of latches 30 can be one, two, three, etc. Of course, the hook 30 can also be upside down to partially surround the top seat 10 and the base 20. Specifically, the third plate abuts against the top seat 10, the second plate abuts against the base 20 and the top seat 10 respectively, the fourth plate abuts against the base 20 and the top seat 10 respectively, the first plate abuts against the base 20, and the fifth plate abuts against the base 20. Thus, the first plate, the second plate, the third plate, the fourth plate and the fifth plate together upside down to partially surround the top seat 10 and the base 20, so that the top seat 10 and the base 20 can be detachably connected.

[0052] Please see Figure 1 , Figure 2 and Figure 4 , Figure 4 This invention provides Figure 1 A schematic diagram of the cross-section along the BB direction.

[0053] The negative pressure chamber 22 includes a negative auxiliary chamber 23, a negative functional chamber 25, and a negative connecting chamber 27, which connects the negative auxiliary chamber 23 and the negative functional chamber 25. The negative pressure connecting assembly 60 includes a negative pressure piston 61, a negative connecting rod 62, a negative transition piston 63, a negative helical gear 64, a negative screw piston 65, and a negative return spring 601. The top seat 10 extends away from the base 20 to form a negative motion chamber that communicates with the liquid suction channel 12. The negative pressure piston 61 is placed in the negative motion chamber, which has a vent that communicates with the atmosphere. The negative transition piston 63 is placed in the negative auxiliary chamber 23. The negative connecting rod 62 connects the negative pressure piston 61 and the negative transition piston 63. The negative helical gear 64 is fitted into the suction hole and meshes with the suction stop assembly 40. The negative screw piston is placed in the negative functional chamber 25 and is threadedly connected to the negative helical gear 64. The negative return spring 601 is connected to the negative screw piston and the end of the base 20 facing the top seat 10. The negative pressure piston 61 moves towards the base 20 under pressure. The negative pressure piston 61 drives the negative transition piston 63 to move through the negative connecting rod 62. The negative transition piston 63 compresses the negative auxiliary chamber 23. The negative auxiliary chamber 23 transmits the pressure to the negative functional chamber 25 through the negative connecting chamber 27. The negative functional chamber 25 applies the pressure to the negative screw piston 65. The negative screw piston 65 moves upward. At this time, the negative return spring 601 is compressed. Because the negative screw piston 65 and the negative helical gear 64 are threadedly connected, the negative helical gear 64 will rotate. The negative helical gear 64 further drives the suction stop assembly 40 to rotate. After the aspirator stops sucking up waste liquid, the pressure on the negative pressure piston 61 disappears, the negative return spring 601 returns to its original deformation, and drives the negative screw piston to move in the opposite direction. The negative helical gear 64 is driven to rotate in the opposite direction by the negative screw piston. Furthermore, the suction stop assembly 40 rotates in the opposite direction to return to its original position. The suction stop assembly 40 blocks the connection between the suction channel 12 and the common channel 13. In addition, the reverse movement of the negative screw piston will compress the air in the negative functional chamber 25. The air is transmitted to the negative auxiliary chamber 23 through the negative connecting chamber 27, thereby driving the negative pressure piston 61 and the negative transition piston 63 to reset.

[0054] The negative helical gear 64 has a negative threaded hole 66 inside, and a negative rack 67 that meshes with the suction stop assembly 40 is provided on the outside of the negative helical gear 64. The negative screw piston 65 includes a negative piston part 68 and a negative screw part 69 connected to the negative piston part 68. The negative piston part 68 is disposed in the negative functional cavity 25 and is used to be squeezed or actively compressed by the air in the negative functional cavity 25. The negative screw part 69 has a threaded structure and is threadedly connected to the negative threaded hole 66. During the upward or downward movement, the negative screw part 69 drives the negative helical gear 64 to rotate through the threaded connection with the negative threaded hole 66. The negative helical gear 64 drives the suction stop assembly 40 to rotate through the negative rack 67. The negative return spring 601 is connected to the negative piston part 68 and sleeved on the negative screw part 69. The negative screw part 69 supports the negative return spring 601, ensuring that the negative return spring 601 always moves in the extension direction of the negative screw part 69.

[0055] The suction stop assembly 40 includes a suction valve core 41 that meshes with a negative rack 67. The suction valve core 41 includes a suction frustum 43 and a suction valve part 44 connected to the suction frustum 43. The suction frustum 43 has an internal suction groove 45 that meshes with the negative rack 67. The negative rack 67 and the internal suction groove 45 work together to drive the suction frustum 43 to rotate, which in turn drives the suction valve part 44 to rotate. The suction valve part 44 has a transverse suction passage 46 for allowing liquid to flow. When the suction valve part 44 rotates a certain angle, the suction passage 46 connects to the liquid suction channel 12 and the common channel 13, respectively, thereby keeping the liquid suction channel 12 and the common channel 13 unobstructed. Under normal circumstances, the part of the suction valve part 44 that is not provided with the suction passage 46 is aligned with the liquid suction channel 12 and the common channel 13, thus achieving the purpose of suction and blocking the liquid suction channel and the common channel 13.

[0056] The suction stop assembly 40 also includes a suction ring 42, around which a negative helical gear 64 is wound, and a suction frustum 43 presses the suction ring 42 onto the top seat 10. The suction ring 42 serves to seal the gap between the negative helical gear 64 and the top seat 10, preventing liquid on the top seat 10 from overflowing into the base 20 through the negative helical gear 64 and thus contaminating the base 20. The suction ring 42 can be made of silicone or foam.

[0057] In another embodiment, the medical three-way switch also includes an indicator component 80, which indicates that the aspiration channel 12 and the common channel 13 are connected. Specifically, the indicator component 80 includes a knob 81, a lever 82, and a rotating gear 83. The knob 81 is located on the outside of the top seat 10 and can be in a straight line or a cross shape. One end of the lever 82 is connected to the knob 81, and the other end is connected to the rotating gear 83. The outer periphery of the suction truncated cone 43 has rotating teeth that mesh with the rotating gear 83. When the suction truncated cone 43 rotates, it drives the rotating gear 83 to rotate through the rotating teeth. The rotating gear 83 further drives the knob 81 to rotate through the lever 82, so that the suction valve core 41 and the knob 81 rotate synchronously, thereby indicating that the aspiration channel 12 and the common channel 13 are connected.

[0058] To achieve the above objectives, the present invention provides the following technical solution: a cyst treatment device, which includes the cyst treatment device described in any of the above embodiments.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A medical three-way switch, characterized in that, The medical three-way switch includes: The top seat has an interconnected injection channel, a suction channel and a common channel. The top seat also has an injection hole that penetrates the injection channel and a suction hole that penetrates the suction channel. The base is connected to the top seat, and the base has a positive pressure chamber and a negative pressure chamber that are isolated from each other; The hook partially surrounds the top seat and the base; A suction stop assembly is fitted into the suction hole and extends to the liquid suction channel, the suction stop assembly being used to block the liquid suction channel and the common channel; A stop assembly is fitted into the injection hole and extends to the injection channel, the stop assembly being used to block the injection channel and the common channel; A negative pressure connection component is assembled in the negative pressure chamber and inserted into the liquid suction channel. The negative pressure connection component is connected to the suction stop component. The negative pressure connection component is used to drive the suction stop component to rotate, so as to open the liquid suction channel and the common channel. A positive pressure connection component is assembled in the positive pressure chamber and inserted into the injection channel. The positive pressure connection component is connected to the injection stop component. The positive pressure connection component is used to drive the injection stop component to rotate, so as to open the injection channel and the common channel. The positive pressure chamber includes a positive auxiliary chamber, a positive functional chamber, and a positive connecting chamber, with the positive connecting chamber connecting the positive auxiliary chamber and the positive functional chamber. The positive pressure connecting assembly includes a positive pressure piston, a positive connecting rod, a positive transition piston, a positive helical gear, a positive screw piston, and a positive return spring. The top seat extends toward the base to form a positive motion chamber communicating with the injection channel. The positive pressure piston is placed in the positive motion chamber, and the positive transition piston is placed in the positive auxiliary chamber. The positive connecting rod connects the positive pressure piston and the positive transition piston respectively. The positive motion chamber and the positive auxiliary chamber are connected. The positive helical gear is assembled in the injection hole and meshes with the injection stop assembly. The positive screw piston is placed in the positive functional chamber and threadedly connected to the positive helical gear. The positive return spring is connected to the positive screw piston and one end of the base facing the top seat respectively.

2. The medical three-way switch according to claim 1, characterized in that, The positive helical gear has a positive threaded hole inside, and a positive rack that meshes with the injection stop assembly is provided on the outside of the positive helical gear. The positive screw piston includes a positive piston part and a positive screw part connected to the positive piston part. The positive piston part is disposed in the positive functional cavity, and the positive screw part has a threaded structure and is threadedly connected to the positive threaded hole. The positive return spring is connected to the positive piston part and sleeved on the positive screw part.

3. The medical three-way switch according to claim 2, characterized in that, The injection stop assembly includes an injection valve core that meshes with the spur rack. The injection valve core includes an injection frustum and an injection valve part connected to the injection frustum. The injection frustum has an internal injection tooth groove that meshes with the spur rack. The injection valve part has a transverse injection passage groove for liquid flow.

4. The medical three-way switch according to claim 3, characterized in that, The injection stop assembly also includes an injection stop ring, which is wound around the positive helical gear, and the injection cylinder presses the injection stop ring onto the top seat.

5. The medical three-way switch according to claim 3, characterized in that, The medical three-way switch also includes an indicator component, which includes a knob, a lever, and a rotating gear. The knob is located on the outside of the top seat. One end of the lever is connected to the knob, and the other end is connected to the rotating gear. The outer periphery of the injection truncated cone has rotating teeth that mesh with the rotating gear.

6. The medical three-way switch according to claim 1, characterized in that, The negative pressure chamber includes a negative auxiliary chamber, a negative functional chamber, and a negative connecting chamber, with the negative connecting chamber connecting the negative auxiliary chamber and the negative functional chamber. The negative pressure connecting assembly includes a negative pressure piston, a negative connecting rod, a negative transition piston, a negative helical gear, a negative screw piston, and a negative return spring. The top seat extends away from the base to form a negative motion chamber communicating with the liquid suction channel. The negative motion chamber has a vent. The negative pressure piston is placed in the negative motion chamber, and the negative transition piston is placed in the negative auxiliary chamber. The negative connecting rod connects the negative pressure piston and the negative transition piston respectively. The negative helical gear is assembled in the suction hole and meshes with the suction stop assembly. The negative screw piston is placed in the negative functional chamber and threadedly connected to the negative helical gear. The negative return spring is connected to the negative screw piston and the end of the base facing the top seat respectively.

7. The medical three-way switch according to claim 6, characterized in that, The negative helical gear has a negative threaded hole inside, and a negative rack that meshes with the suction stop assembly is provided on the outside of the negative helical gear. The negative screw piston includes a negative piston part and a negative screw part connected to the negative piston part. The negative piston part is disposed in the negative functional cavity, and the negative screw part has a threaded structure and is threadedly connected to the negative threaded hole. The negative return spring is connected to the negative piston part and sleeved on the negative screw part.

8. The medical three-way switch according to claim 7, characterized in that, The suction stop assembly includes a suction valve core that meshes with the negative rack. The suction valve core includes a suction frustum and a suction valve part connected to the suction frustum. The suction frustum has an internal suction groove that meshes with the negative rack. The suction valve part has a transverse suction passage groove for liquid flow.

9. A cyst treatment device, characterized in that, The cyst treatment device includes: the medical three-way switch as described in any one of claims 1 to 8.

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