Negative pressure drainage device for breast surgery

Abstract

The invention discloses a negative pressure drainage device for breast surgery, which relates to the technical field of drainage devices, and adopts the technical scheme that the negative pressure drainage device comprises a negative pressure piston cavity, a pneumatic negative pressure mechanism is arranged in the negative pressure piston cavity, and a drainage mechanism is arranged on one side of the negative pressure piston cavity; the drainage mechanism comprises a drainage mounting nozzle, the drainage mounting nozzle is fixedly connected with the negative pressure piston cavity, and a hard plastic intubation tube is inserted into the drainage mounting nozzle. The negative pressure drainage device for the breast surgery has the advantages that the hard plastic intubation tube is manually pulled to be separated from the drainage mounting nozzle; the hard plastic insertion tube is separated from the drainage installation nozzle, the hard plastic hexagonal shaft is exposed, the hard plastic hexagonal shaft is rotated anticlockwise, the hard plastic threaded column is separated from the connecting plate in a threaded engagement mode, then the hard plastic threaded column is separated from the connecting plate, a drainage area device is convenient to replace, and similarly, a new drainage device is convenient to replace. Therefore, the negative pressure area device can be repeatedly used, and drainage economic cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage devices, and in particular to a negative pressure drainage device for breast surgery. Background Art

[0002] During breast surgery, the wound needs to be drained to remove accumulated fluid and bleeding, and drainage through an injection syringe is also a common method.

[0003] For example, publication number CN213608706U discloses a negative pressure drainage device for breast surgery, comprising a syringe and a drainage bottle fixedly disposed thereunder. The middle portion of the drainage bottle is hollowed out, and a hollow column integrally formed with and connected to the drainage bottle is provided in the hollowed-out middle portion. A piston rod and a piston are provided inside the syringe. A through hole is provided in the middle portion of the piston, through which the piston rod passes and a sealing cap is fixedly provided at the front end. A circular groove that matches the sealing cap is provided at the bottom end of the piston. The front end of the telescopic rod is fixedly connected to the sealing cap. A first one-way valve is installed between the bottom end of the syringe and the drainage bottle. A drainage tube is inserted at one end of the second one-way valve. One end of the drainage tube is connected to a drainage head by providing a corrugated connecting tube. The outer fixing sleeve of the corrugated connecting tube is provided with a waterproof patch. The utility model reduces the resistance when the piston rod is pushed forward, has a simple structure, is convenient for drainage, is convenient for handheld use anywhere, and is also convenient for the insertion and fixation of the drainage head.

[0004] In the above patent, negative pressure is used to drain the accumulated fluid into the injection syringe. However, the device after drainage comes into contact with the accumulated fluid and needs to be discarded. The entire device needs to be replaced, which increases medical costs. Therefore, there is a need for a negative pressure drainage device for breast surgery that separates the negative pressure area from the drainage area. After the drainage is completed, only the drainage area needs to be replaced, reducing economic costs. Summary of the Invention

[0005] To this end, the present invention provides a negative pressure drainage device for breast surgery, which uses a pneumatic negative pressure mechanism and a drainage mechanism to solve the problem that the device after drainage comes into contact with the accumulated fluid and needs to be discarded, and the entire device needs to be replaced, which increases medical costs.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a negative pressure drainage device for breast surgery, comprising a negative pressure piston chamber, a pneumatic negative pressure mechanism is provided inside the negative pressure piston chamber, and a drainage mechanism is provided on one side of the negative pressure piston chamber;

[0007] The drainage mechanism includes a drainage mounting nozzle, the drainage mounting nozzle is fixedly connected to the negative pressure piston chamber, a hard plastic cannula is inserted into the drainage mounting nozzle, one end of the hard plastic cannula is fixedly connected to the hard plastic liquid storage chamber, one end of the hard plastic liquid storage chamber is fixedly connected to the soft plastic drainage tube, one end of the soft plastic drainage tube is fixedly connected to the drainage sealing rubber pad, the bottom of the hard plastic liquid storage chamber is fixedly connected to the hard plastic port, a drainage assembly is provided inside the hard plastic port, a hard plastic hexagonal shaft is inserted into the hard plastic cannula, both ends of the hard plastic hexagonal shaft are fixedly connected to a hard plastic threaded column and a piston, the outside of the hard plastic hexagonal shaft is provided with a tripod and a hard plastic tripod, and the outside of the hard plastic threaded column is provided with a connecting assembly, the negative pressure drainage connecting assembly includes a connecting plate, connecting frames are fixedly provided on both sides of the connecting plate, one end of the two connecting frames are fixedly connected to a connecting block, and one side of the two connecting blocks is provided with a second spring and a second telescopic rod.

[0008] Preferably, the pneumatic negative pressure mechanism includes a pneumatic piston chamber, which is fixedly arranged inside the negative pressure piston chamber, and an air nozzle is fixedly arranged on the top of the pneumatic piston chamber, and the top of the air nozzle passes through the negative pressure piston chamber and is fixedly connected to the top of the negative pressure piston chamber. A pneumatic piston is provided inside the pneumatic piston chamber, and two piston rods are fixedly connected to one side of the pneumatic piston, and one end of the two piston rods is fixedly connected to the negative pressure piston, and two first telescopic rods are fixedly connected to one side wall of the negative pressure piston chamber, and the other ends of the two first telescopic rods are fixedly connected to one side wall of the negative pressure piston chamber, and the outside of the two first telescopic rods are both sleeved with a first spring, and one end of the two first springs is fixedly connected to one side wall of the negative pressure piston, and the other end of the two first springs is fixedly connected to one side wall of the negative pressure piston chamber.

[0009] Preferably, the drainage component includes a hard plastic tube, which is fixed inside a hard plastic port, and a hard plastic fixing ring is fixedly sleeved on the outside of the hard plastic tube. A third spring is fixedly connected to the bottom of the hard plastic fixing ring, and a hard plastic movable pad is fixedly connected to the bottom of the third spring. A plurality of drainage ports are opened inside the hard plastic movable pad.

[0010] Preferably, the pneumatic piston is disposed inside the pneumatic piston cavity and is slidably connected to the inside of the pneumatic piston cavity.

[0011] Preferably, the piston rod passes through a side wall of the pneumatic piston chamber and extends into the interior of the negative pressure piston chamber, and the piston rod is slidably connected to a side wall of the pneumatic piston chamber.

[0012] Preferably, the negative pressure piston is disposed inside the negative pressure piston cavity and is slidably connected to the inside of the negative pressure piston cavity.

[0013] Preferably, both ends of the second spring are fixedly connected to the second telescopic rod, one end of the second telescopic rod is fixedly connected to the negative pressure piston, and the other end of the second telescopic rod is fixedly connected to the connecting block.

[0014] Preferably, the hard plastic threaded column extends into the interior of the connecting plate and is connected to the connecting plate through threads.

[0015] Preferably, the hard plastic hexagonal shaft passes through the tripod and the hard plastic tripod and is slidably connected to the tripod and the hard plastic tripod, the tripod is fixed inside the drainage installation nozzle, and the hard plastic tripod is fixed inside the hard plastic cannula.

[0016] Preferably, the piston is arranged inside the soft plastic drainage tube and is slidably connected to the soft plastic drainage tube.

[0017] The embodiments of the present invention have the following advantages:

[0018] 1. The second telescopic rod and the second spring pull the connecting block to move through the negative pressure piston. The movement of the connecting block causes the hard plastic threaded column to drive the hard plastic hexagonal shaft to move through the connecting frame and the connecting plate. The movement of the hard plastic hexagonal shaft causes the piston to retract into the hard plastic liquid storage chamber, thereby making the soft plastic drainage tube unobstructed. As the negative pressure piston continues to move, a negative pressure area is formed inside the negative pressure piston cavity. The accumulated fluid in the affected area is drained into the hard plastic liquid storage chamber through the drainage sealing pad and the soft plastic drainage tube, thereby achieving the purpose of negative pressure drainage.

[0019] 2. Manually pull the hard plastic cannula to separate from the drainage installation nozzle. When the piston fits with the hard plastic tripod, the hard plastic cannula and the drainage installation nozzle are separated and the hard plastic hexagonal shaft leaks out. The hard plastic hexagonal shaft is rotated counterclockwise to disengage the hard plastic threaded column from the connecting plate, thereby separating the hard plastic threaded column from the connecting plate, making it easier to replace the drainage area device. Similarly, it is easier to replace a new drainage device, so that the negative pressure area device can be reused, reducing the economic cost of drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0022] Figure 1A partially cutaway perspective view of the main view provided by the present invention;

[0023] Figure 2 A partially sectional exploded perspective view of the drainage assembly provided by the present invention;

[0024] Figure 3 A partially sectional exploded perspective view of the negative pressure drainage connection assembly provided by the present invention;

[0025] Figure 4 A partial cross-sectional perspective view of the negative pressure mechanism provided by the present invention;

[0026] Figure 5 The present invention provides Figure 1 Stereoscopic view at A in the middle;

[0027] Figure 6 The present invention provides Figure 2 Stereoscopic view at point B in the middle;

[0028] Figure 7 The main stereogram provided by the present invention;

[0029] Figure 8 This is a bottom perspective view provided by the present invention.

[0030] In the figure: 1 negative pressure piston chamber, 2 pneumatic piston chamber, 3 air nozzle, 4 pneumatic piston, 5 piston rod, 6 negative pressure piston, 7 first telescopic rod, 8 first spring, 9 drainage mounting nozzle, 10 second spring, 11 second telescopic rod, 12 connecting block, 13 connecting frame, 14 connecting plate, 15 hard plastic threaded column, 16 hard plastic hexagonal shaft, 17 piston, 18 tripod, 19 hard plastic tripod, 20 hard plastic cannula, 21 hard plastic liquid storage chamber, 22 soft plastic drainage tube, 23 drainage sealing pad, 24 hard plastic port, 25 hard plastic tube, 26 hard plastic fixing ring, 27 third spring, 28 hard plastic movable pad, 29 drainage port. DETAILED DESCRIPTION

[0031] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0032] Refer to the attached Figure 1 -Attached Figure 8 The present invention provides a negative pressure drainage device for breast surgery, comprising a negative pressure piston chamber 1, a pneumatic negative pressure mechanism is provided inside the negative pressure piston chamber 1, and a drainage mechanism is provided on one side of the negative pressure piston chamber 1;

[0033] The drainage mechanism includes a drainage installation nozzle 9, the drainage installation nozzle 9 is fixedly connected to the negative pressure piston chamber 1, a hard plastic cannula 20 is inserted into the drainage installation nozzle 9, one end of the hard plastic cannula 20 is fixedly connected to a hard plastic liquid storage chamber 21, one end of the hard plastic liquid storage chamber 21 is fixedly connected to a soft plastic drainage tube 22, one end of the soft plastic drainage tube 22 is fixedly connected to a drainage sealing pad 23, the bottom of the hard plastic liquid storage chamber 21 is fixedly connected to a hard plastic port 24, a drainage component is provided inside the hard plastic port 24, and the hard plastic cannula 20 is internally plugged with a A hard plastic hexagonal shaft 16, with hard plastic threaded columns 15 and pistons 17 fixedly connected at both ends of the hard plastic hexagonal shaft 16, a tripod 18 and a hard plastic tripod 19 are sleeved on the outside of the hard plastic hexagonal shaft 16, and a connecting assembly is provided on the outside of the hard plastic threaded column 15. The negative pressure drainage connecting assembly includes a connecting plate 14, and connecting frames 13 are fixedly provided on both sides of the connecting plate 14. One end of each connecting frame 13 is fixedly connected to a connecting block 12, and one side of each connecting block 12 is provided with a second spring 10 and a second telescopic rod 11;

[0034] In this embodiment, in order to achieve drainage and facilitate the replacement of the drainage mechanism after drainage, the second telescopic rod 11 and the second spring 10 are pulled to move the connecting block 12 through the negative pressure piston 6. The connecting block 12 moves through the connecting frame 13 and the connecting plate 14, so that the hard plastic threaded column 15 drives the hard plastic hexagonal shaft 16 to move. The hard plastic hexagonal shaft 16 moves so that the piston 17 is retracted into the hard plastic liquid storage chamber 21, so that the soft plastic drainage tube 22 is in an unobstructed state. As the negative pressure piston 6 continues to move, a negative pressure area is formed inside the negative pressure piston cavity 1, and the accumulated fluid in the affected area is discharged through the drainage sealing pad 23 and the soft plastic drainage tube 22. The plastic drainage tube 22 is drained into the hard plastic liquid storage chamber 21 to achieve the purpose of negative pressure drainage. By manually pulling the hard plastic cannula 20 away from the drainage installation nozzle 9, when the piston 17 is in contact with the hard plastic tripod 19, the hard plastic cannula 20 is separated from the drainage installation nozzle 9 and the hard plastic hexagonal shaft 16 is leaked out. The hard plastic hexagonal shaft 16 is rotated counterclockwise to disengage the hard plastic threaded column 15 from the connecting plate 14, thereby disengaging the hard plastic threaded column 15 from the connecting plate 14, making it easier to replace the drainage area device. Similarly, it is easier to replace a new drainage device, so that the negative pressure area device can be reused, reducing the economic cost of drainage.

[0035] Among them, in order to achieve the purpose of forming negative pressure, the present device adopts the following technical solutions: the pneumatic negative pressure mechanism includes a pneumatic piston chamber 2, the pneumatic piston chamber 2 is fixedly arranged inside the negative pressure piston chamber 1, the top of the pneumatic piston chamber 2 is fixedly provided with an air nozzle 3, the top of the air nozzle 3 passes through the negative pressure piston chamber 1 and is fixedly connected to the top of the negative pressure piston chamber 1, a pneumatic piston 4 is provided inside the pneumatic piston chamber 2, one side of the pneumatic piston 4 is fixedly connected to two piston rods 5, one end of the two piston rods 5 is fixedly connected to a negative pressure piston 6, one side of the negative pressure piston 6 is fixedly connected to two first telescopic rods 7, the other end of the two first telescopic rods 7 The ends are fixedly connected to one side wall of the negative pressure piston chamber 1, the outside of the two first telescopic rods 7 are sleeved with a first spring 8, one end of the two first springs 8 are fixedly connected to one side wall of the negative pressure piston 6, the other end of the two first springs 8 are fixedly connected to one side wall of the negative pressure piston chamber 1, the pneumatic piston 4 is arranged inside the pneumatic piston chamber 2 and is slidably connected to the inside of the pneumatic piston chamber 2, the piston rod 5 passes through one side wall of the pneumatic piston chamber 2 and extends into the inside of the negative pressure piston chamber 1, the piston rod 5 is slidably connected to one side wall of the pneumatic piston chamber 2, and the negative pressure piston 6 is arranged inside the negative pressure piston chamber 1 and is slidably connected to the inside of the negative pressure piston chamber 1;

[0036] Among them, in order to achieve the purpose of connecting the negative pressure area and the drainage area, the present device adopts the following technical solutions: both ends of the second spring 10 are fixedly connected to the second telescopic rod 11, one end of the second telescopic rod 11 is fixedly connected to the negative pressure piston 6, the other end of the second telescopic rod 11 is fixedly connected to the connecting block 12, the hard plastic threaded column 15 extends into the interior of the connecting plate 14 and is connected to the connecting plate 14 through a thread, the hard plastic hexagonal shaft 16 passes through the tripod 18 and the hard plastic tripod 19 and is slidably connected to the tripod 18 and the hard plastic tripod 19, and the tripod 1 8 is fixedly arranged inside the drainage installation nozzle 9, the hard plastic tripod 19 is fixedly arranged inside the hard plastic cannula 20, the piston 17 is arranged inside the soft plastic drainage tube 22 and is slidably connected to the soft plastic drainage tube 22, the negative pressure piston 6 is connected to the second telescopic rod 11 and the connecting block 12 through the second spring 10, the connecting block 12 is connected to the connecting plate 14 and the hard plastic threaded column 15 through the connecting frame 13, the hard plastic threaded column 15 is connected to the piston 17 through the hard plastic hexagonal shaft 16, and the hard plastic cannula 20 is connected to the drainage installation nozzle 9, so that the negative pressure area and the drainage area are connected;

[0037] Among them, in order to achieve the purpose of draining the liquid accumulated in the hard plastic liquid storage chamber 21, the present device adopts the following technical solutions: the drainage component includes a hard plastic tube 25, the hard plastic tube 25 is fixedly arranged inside the hard plastic port 24, the hard plastic tube 25 is fixedly sleeved with a hard plastic fixing ring 26, the bottom of the hard plastic fixing ring 26 is fixedly connected to a third spring 27, the bottom of the third spring 27 is fixedly connected to a hard plastic movable pad 28, and a plurality of drainage ports 29 are opened inside the hard plastic movable pad 28. When the liquid accumulated in the hard plastic liquid storage chamber 21 is too much and needs to be drained, the air pump device is stopped to pump liquid into the pneumatic piston cavity 2 The air intake of the part allows the gas inside the pneumatic piston chamber 2 to be discharged, and the contracted first telescopic rod 7 and the first spring 8 cause the negative pressure piston 6 to reset to the left, thereby allowing the piston 17 to be inserted into the soft plastic drainage tube 22. When the piston 17 blocks the soft plastic drainage tube 22, as the negative pressure piston 6 continues to move, the internal pressure of the hard plastic liquid storage chamber 21 increases. When the internal pressure of the hard plastic liquid storage chamber 21 is greater than the elastic force of the third spring 27, the hard plastic movable pad 28 is separated from the bottom of the hard plastic tube 25, so that the accumulated liquid in the hard plastic liquid storage chamber 21 is discharged through the hard plastic port 24 and the hard plastic tube 25.

[0038] The use process of the present invention is as follows: when using the present invention, the air nozzle 3 is connected to the air pump device to facilitate the filling of air into the pneumatic piston chamber 2. During drainage, the drainage sealing pad 23 is attached to the drainage place and the edge is sealed to prevent air leakage. The pneumatic piston chamber 2 is filled with air, so that the pneumatic piston 4 moves toward the right end of the pneumatic piston chamber 2, and then the piston rod 5 drives the negative pressure piston 6 to move toward the right end of the negative pressure piston chamber 1. The movement of the negative pressure piston 6 causes the first telescopic rod 7 and the first spring 8 to contract. At the same time, the negative pressure piston 6 pulls the connecting block 12 to move through the second telescopic rod 11 and the second spring 10. The connecting block 12 moves through the connecting frame 13 and the connecting plate 14, so that the hard plastic threaded column 15 drives the hard plastic hexagonal shaft 16 to move. The movement of the hexagonal shaft 16 causes the piston 17 to be retracted into the hard plastic liquid storage chamber 21, thereby making the soft plastic drainage tube 22 unobstructed. As the negative pressure piston 6 continues to move, a negative pressure area is formed inside the negative pressure piston chamber 1, and the accumulated fluid in the affected area is drained into the hard plastic liquid storage chamber 21 through the drainage sealing rubber pad 23 and the soft plastic drainage tube 22, thereby achieving the purpose of negative pressure drainage. When the accumulated fluid in the hard plastic liquid storage chamber 21 needs to be discharged, the air pump device is stopped from supplying air to the pneumatic piston chamber 2 and the gas inside the pneumatic piston chamber 2 can be discharged. The contracted first telescopic rod 7 and the first spring 8 cause the negative pressure piston 6 to reset to the left, thereby allowing the piston 17 to be inserted into the soft plastic drainage tube 22. When the piston 17 blocks the soft plastic When the drainage tube 22 is opened, as the negative pressure piston 6 continues to move, the internal pressure of the hard plastic liquid storage chamber 21 increases. When the internal pressure of the hard plastic liquid storage chamber 21 is greater than the elastic force of the third spring 27, the hard plastic movable pad 28 is separated from the bottom of the hard plastic tube 25, so that the internal fluid of the hard plastic liquid storage chamber 21 is discharged through the hard plastic port 24 and the hard plastic tube 25. The drainage sealing pad 23, the soft plastic drainage tube 22 and the hard plastic liquid storage chamber 21 need to be replaced after use. The hard plastic cannula 20 is manually pulled out of the drainage installation nozzle 9. When the piston 17 is fitted with the hard plastic tripod 19, the hard plastic cannula 20 is separated from the drainage installation nozzle 9 and the hard plastic hexagonal shaft 16 is leaked. The hard plastic hexagonal shaft 16 is rotated counterclockwise so that the hard plastic threaded column 1 5 is disengaged from the threaded engagement with the connecting plate 14, thereby disengaging the hard plastic threaded column 15 from the connecting plate 14, which facilitates the replacement of the drainage area device. Similarly, when replacing a new drainage device, first connect the hard plastic threaded column 15 to the connecting plate 14, and then insert the hard plastic cannula 20 into the drainage installation nozzle 9. The outer diameter of the hard plastic cannula 20 is slightly larger than the inner diameter of the drainage installation nozzle 9. At the same time, the plastic material of the hard plastic cannula 20 allows the hard plastic cannula 20 to be inserted into the drainage installation nozzle 9 in an interference fit manner. In the absence of strong dragging, the hard plastic cannula 20 will not be disengaged from the drainage installation nozzle 9, so that the negative pressure drainage operation can be carried out stably, thereby allowing the negative pressure area device to be reused, reducing the economic cost of drainage.

[0039] The above are merely preferred embodiments of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement based on the technical solutions of the present invention falls within the scope of protection claimed by the present invention.

Claims

1. A negative pressure drainage device for breast surgery, comprising a negative pressure piston chamber (1), characterized in that: A pneumatic negative pressure mechanism is provided inside the negative pressure piston chamber (1), and a drainage mechanism is provided on one side of the negative pressure piston chamber (1); The drainage mechanism comprises a drainage installation nozzle (9), the drainage installation nozzle (9) is fixedly connected to the negative pressure piston chamber (1), a hard plastic insert tube (20) is inserted into the drainage installation nozzle (9), one end of the hard plastic insert tube (20) is fixedly connected to a hard plastic liquid storage chamber (21), one end of the hard plastic liquid storage chamber (21) is fixedly connected to a soft plastic drainage tube (22), one end of the soft plastic drainage tube (22) is fixedly connected to a drainage sealing rubber pad (23), the bottom of the hard plastic liquid storage chamber (21) is fixedly connected to a hard plastic port (24), and a drainage component is provided inside the hard plastic port (24).

2. A negative pressure drainage device for breast surgery according to claim 1, characterized in that: A hard plastic hexagonal shaft (16) is inserted into the hard plastic insert (20), and a hard plastic threaded column (15) and a piston (17) are fixedly connected at both ends of the hard plastic hexagonal shaft (16). A tripod (18) and a hard plastic tripod (19) are sleeved on the outside of the hard plastic hexagonal shaft (16), and a connecting component is provided on the outside of the hard plastic threaded column (15).

3. The negative pressure drainage device for breast surgery according to claim 2, characterized in that: The negative pressure drainage connection assembly comprises a connection plate (14), a connection frame (13) is fixedly provided on both sides of the connection plate (14), one end of each of the two connection frames (13) is fixedly connected to a connection block (12), one side of each of the two connection blocks (12) is provided with a second spring (10) and a second telescopic rod (11), and the piston (17) is arranged inside the soft plastic drainage tube (22) and is slidably connected to the soft plastic drainage tube (22).

4. The negative pressure drainage device for breast surgery according to claim 1, characterized in that: The pneumatic negative pressure mechanism comprises a pneumatic piston chamber (2), wherein the pneumatic piston chamber (2) is fixedly arranged inside the negative pressure piston chamber (1), an air nozzle (3) is fixedly arranged on the top of the pneumatic piston chamber (2), the top of the air nozzle (3) passes through the negative pressure piston chamber (1) and is fixedly connected to the top of the negative pressure piston chamber (1), a pneumatic piston (4) is arranged inside the pneumatic piston chamber (2), two piston rods (5) are fixedly connected to one side of the pneumatic piston (4), one end of the two piston rods (5) is fixedly connected to the negative pressure piston (6), one side of the negative pressure piston (6) is fixedly connected to two first telescopic rods (7), the other ends of the two first telescopic rods (7) are fixedly connected to a side wall of the negative pressure piston chamber (1), the outside of the two first telescopic rods (7) are both sleeved with a first spring (8), one end of the two first springs (8) are both fixedly connected to a side wall of the negative pressure piston (6), and the other ends of the two first springs (8) are both fixedly connected to a side wall of the negative pressure piston chamber (1).

5. The negative pressure drainage device for breast surgery according to claim 1, characterized in that: The liquid discharge component comprises a hard plastic tube (25), the hard plastic tube (25) is fixedly arranged inside the hard plastic port (24), a hard plastic fixing ring (26) is fixedly sleeved on the outside of the hard plastic tube (25), a third spring (27) is fixedly connected to the bottom of the hard plastic fixing ring (26), the bottom of the third spring (27) is fixedly connected to a hard plastic movable pad (28), and a plurality of liquid discharge ports (29) are opened inside the hard plastic movable pad (28).

6. The negative pressure drainage device for breast surgery according to claim 4, characterized in that: The pneumatic piston (4) is arranged inside the pneumatic piston chamber (2) and is slidably connected to the inside of the pneumatic piston chamber (2).

7. The negative pressure drainage device for breast surgery according to claim 4, characterized in that: The piston rod (5) passes through a side wall of the pneumatic piston chamber (2) and extends into the interior of the negative pressure piston chamber (1); the piston rod (5) is slidably connected to a side wall of the pneumatic piston chamber (2).

8. The negative pressure drainage device for breast surgery according to claim 3, characterized in that: Both ends of the second spring (10) are fixedly connected to the second telescopic rod (11), one end of the second telescopic rod (11) is fixedly connected to the negative pressure piston (6), and the other end of the second telescopic rod (11) is fixedly connected to the connecting block (12), and the negative pressure piston (6) is arranged inside the negative pressure piston chamber (1) and is slidably connected to the inside of the negative pressure piston chamber (1).

9. The negative pressure drainage device for breast surgery according to claim 2, characterized in that: The hard plastic threaded column (15) extends into the interior of the connecting plate (14) and is connected to the connecting plate (14) via threads.

10. The negative pressure drainage device for breast surgery according to claim 2, characterized in that: The hard plastic hexagonal shaft (16) passes through the tripod (18) and the hard plastic tripod (19) and is slidably connected to the tripod (18) and the hard plastic tripod (19); the tripod (18) is fixedly arranged inside the drainage installation nozzle (9); and the hard plastic tripod (19) is fixedly arranged inside the hard plastic cannula (20).

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