Fetal head vacuum extraction device

Abstract

The present invention provides a fetal head vacuum suction device, which relates to the field of medical technology. The fetal head vacuum suction device includes a handle, and the left side wall of the handle is fixedly connected with a front box, a main through pipe, and a suction cup in sequence, and the handle and the front box are fixedly connected by an upper support tube and a lower support tube. In the present invention, the suction cup can be folded and shrunk by a guide rod by pushing the push plate, thereby reducing the adverse feeling caused to the mother when the suction cup is inserted into the mother. The folding component can be opened by the clamping component after the suction cup enters the mother to restore the shape of the suction cup. The waterproof probe, wire, and USB connector are set to observe the traction position in real time during the traction process, and the pressure relief treatment can be performed in the first time when an accident is found. The passive safety valve can always control the internal negative pressure within a safe range and will not exceed the safety value, thereby avoiding damage to the fetal head. The first anti-slip rubber sleeve and the second anti-slip rubber sleeve can avoid slipping during use.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and specifically to a fetal head vacuum aspiration device. Background Art

[0002] In the early days, when obstetricians in hospitals encountered difficult labor, the fetal head aspirator they used was connected by a glass syringe and a rubber hose. By repeatedly sucking, negative pressure was generated inside the fetal head aspirator. Generally, it was completed by the cooperation of two or more people, which brought certain difficulties to the work. Moreover, if the glass syringe was not properly handled, it was easy to break, causing unnecessary virus and bacterial infections. And the generated negative pressure, without accurate measurement, could not reach the accurate negative pressure value, making it easy for the fetal head to slip or be too tight when being pulled by the fetal head suction cup, bringing certain risks to the fetus. In severe cases, the fetus could be suffocated or die.

[0003] With the development of technology, people invented a palm-sized negative pressure pump, which generated negative pressure suction by manual pressing and was equipped with a vacuum float. Different negative pressure value ranges were distinguished by different colors on the vacuum float. The negative pressure value could be controlled by observing the color area on the vacuum float, avoiding being too tight or too loose. It had been greatly improved compared with the early technology.

[0004] However, the common fetal head vacuum aspiration devices on the market still have many inconveniences in use. For example, when inserting the device into the mother's body, it is necessary to manually pinch the suction cup together to insert it. And generally, the negative pressure value is controlled by manual reading. When the negative pressure value is too high, manual pressure relief is required. At this time, the excessive negative pressure has already affected the baby. Moreover, during the traction process of the current device, the situation of the attracted position of the fetal head cannot be observed. In some cases, unexpected situations at the attracted part of the fetal head cannot be known in time and can only be discovered after removing the device at the end of the traction work, resulting in the inability to know and handle the accident in the first time and there being potential safety hazards. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a fetal head vacuum aspiration device, which solves the problems that in the prior art, it is necessary to manually pinch the suction cup together to insert it into the mother's body, and that the existing device only controls the negative pressure value by manual reading, which is likely to cause damage to the fetal head and the attracted position cannot be observed in real time during the traction process.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the present invention is realized by the following technical solutions: A fetal head vacuum aspiration device, including a handle, on the left side wall of the handle are sequentially fixedly connected with a front box, a main pipe, and a suction cup. The handle and the front box are fixedly connected by an upper support pipe and a lower support pipe. The upper support pipe is arranged above the lower support pipe. End caps are threadedly connected to both the top and bottom of the handle. Inside the handle are arranged a negative pressure generating component and an active safety component. Anti-slip components for preventing slipping are arranged on the outer sides of the handle and the negative pressure generating component. Inside the front box are sequentially fixedly connected with a passive safety component, a first three-way joint, and a second three-way joint from top to bottom. A negative pressure gauge is fixedly connected to the front wall of the front box. The outer wall of the negative pressure gauge penetrates through the front wall of the front box to the inside and is fixedly connected to the front side interface of the second three-way joint. The lower side interface of the second three-way joint is fixedly connected to the negative pressure generating component. The upper side interface of the first three-way joint is fixedly connected to the passive safety component. The right side interface of the first three-way joint is fixedly connected to the active safety component. Inside the main pipe are fixedly connected with a first air inlet pipe, a first air extraction pipe, and a visual component. A sealing filling layer is arranged between the first air inlet pipe, the first air extraction pipe, the visual component and the inner wall of the main pipe. The ends of the first air inlet pipe and the first air extraction pipe facing the suction cup are both communicated with the inside of the suction cup. The outer walls of the ends of the first air inlet pipe and the first air extraction pipe away from the suction cup penetrate through the side wall of the front box to the inside. The end of the first air inlet pipe away from the suction cup is fixedly connected to the left side interface of the first three-way joint. The end of the first air extraction pipe away from the suction cup is fixedly connected to the upper side interface of the second three-way joint. Multiple groups of guiding blind holes are arranged on the inner wall of the suction cup. The openings of multiple groups of the guiding blind holes all face the front box. A closing device for closing the suction cup is arranged on the outer wall of the main pipe. The closing device is slidably connected with multiple groups of guiding blind holes. A clamping component for fixing the position of the closing device on the outer wall of the main pipe is arranged on the closing device.

[0009] Preferably, the negative pressure generating component includes a negative pressure generating pump, a support rod, and a second air extraction pipe. The negative pressure generating pump is fixedly connected inside the handle. The negative pressure generating pump is arranged between the inner upper wall and the inner lower wall of the handle. The second air extraction pipe is fixedly connected to the side wall of the negative pressure generating pump. The outer wall of the end of the second air extraction pipe away from the negative pressure generating pump sequentially penetrates through the left side wall of the handle, the inner wall of the lower support pipe, and the right side wall of the front box to the inside of the front box. The end of the second air extraction pipe away from the negative pressure generating pump is fixedly connected to the lower side interface of the second three-way joint. The support rod is slidably connected to the side wall of the negative pressure generating pump away from the second air extraction pipe. The outer wall of the end of the support rod away from the negative pressure generating pump penetrates through the right side wall of the handle. The end of the support rod away from the negative pressure generating pump is fixedly connected with a pressure handle.

[0010] Preferably, the anti-slip components include a first anti-slip rubber sleeve and a second anti-slip rubber sleeve. The first anti-slip rubber sleeve is sleeved on the outer wall of the pressure handle. The second anti-slip rubber sleeve is sleeved on the outer wall of the handle.

[0011] Preferably, the active safety component includes an active safety valve and a second intake pipe. The active safety valve is fixedly connected to the left inner wall of the handle. The outer wall of the active safety valve button penetrates through the left side wall of the handle. The second intake pipe is fixedly connected to the top of the active safety valve. One end of the second intake pipe away from the active safety valve penetrates through the left side wall of the handle, the inner wall of the upper support pipe, and the right side wall of the front box to the inside of the front box in sequence. The end of the second intake pipe away from the active safety valve is fixedly connected to the right interface of the first three-way joint.

[0012] Preferably, the passive safety component includes a passive safety valve and an air extraction port. The passive safety valve is fixedly connected to the left inner wall of the front box. The passive safety valve is arranged on the inner wall of the front box and above the first three-way joint. The passive safety valve is fixedly connected to the upper interface of the first three-way joint. The air extraction port is fixedly connected to the side of the front box away from the handle. The air extraction port is arranged on the side wall of the front box and above the main pipe. The outer wall of the air extraction port penetrates through the side wall of the front box. The end of the air extraction port extending into the front box is fixedly connected to the passive safety valve.

[0013] Preferably, the folding device includes a push plate, a baffle, a first spring, and multiple guide rods. The baffle is fixedly connected to the outer wall of the main pipe. The baffle is arranged on the outer wall of the main pipe and near one end of the suction cup. The push plate is slidably connected to the outer wall of the main pipe. The push plate is arranged on the outer wall of the main pipe and between the baffle and the front box. Multiple guide rods are fixedly connected to the side of the push plate facing the baffle. Multiple guide rods are circularly arrayed on the side wall of the push plate. One end of multiple guide rods away from the push plate penetrates through the baffle. The ends of multiple guide rods away from the push plate are slidably connected to multiple guide blind holes. The first spring is sleeved on the outer wall of the main pipe and between the push plate and the baffle.

[0014] Preferably, the clamping component includes an annular clamping part, a second spring, a buckle, and a stop block. The stop block is fixedly connected to the outer wall of the lowermost group among multiple guide rods. The stop block is arranged on the outer wall of the lowermost group among multiple guide rods and near the push plate. There is an annular groove on the outer wall of the baffle. The annular clamping part is slidably connected to the inside of the annular groove. The second spring is arranged between the upper inner wall of the annular clamping part and the annular groove. The buckle is fixedly connected to the lower inner wall of the annular clamping part.

[0015] Preferably, the visual component includes a waterproof probe, a wire, and a USB connector. The waterproof probe is fixedly connected to the inner wall of the main pipe and near one end of the suction cup. The wire is fixedly connected to one end of the waterproof probe facing the front box. One end of the wire away from the waterproof probe penetrates through the inside of the main pipe, the left wall of the front box, and the lower wall of the front box to the lower side of the front box in sequence. The USB connector is fixedly connected to the end of the wire away from the waterproof probe.

[0016] Working principle: Hold the handle with one hand, and push the push plate towards the baffle with the other hand, driving the guide rod to slide into the guiding blind hole. The suction cup is closed and reduced by the restraint of the guide rod until the push plate is hooked on the buckle on the inner annular fixture of the baffle through the stopper on the outer wall of the guide rod. Connect the wire of the waterproof probe to the display device through the USB connector. Insert the closed and reduced suction cup into the mother body, and observe the insertion length through the probe. When entering the mother body and approaching the fetal head, press the annular fixture to disengage the buckle from the stopper. The push plate is restored to the disposal position by the restoring elastic force of the first spring, synchronously driving the guide rod to retreat to the mouth of the guiding blind hole in the suction cup. The suction cup loses the restraint of the guide rod and returns to a circular shape. Further, push the handle to put the suction cup on the fetal head, and check whether the suction position is correct through the waterproof probe. Confirm that there is no maternal tissue clamped between the suction cup and the fetal head, and make appropriate adjustments. After the adjustment is completed, hold the handle with four fingers of one hand, place the thumb on the pressing handle, and the thumb and the other four fingers make a fist-like force to drive the pressing handle to press the negative pressure generating pump. The negative pressure generating pump evacuates the air between the suction cup and the fetal head through the second exhaust pipe and the first exhaust pipe to form a negative pressure. Observe the range of the negative pressure value through the negative pressure gauge. When approaching the range, appropriately reduce the amplitude of pressing the pressing handle until the negative pressure value reaches the specified safety value, and then perform the traction work. During the traction process, check the real-time image of the traction position transmitted by the waterproof probe to the display device. When an abnormal situation occurs during the traction process and after the traction work is completed, press the active safety valve to connect the outside with the suction cup and the fetal head through the second intake pipe and the first intake pipe, so that the negative pressure between the suction cup and the fetal head disappears, and the suction cup can be separated from the fetal head. During the formation of the negative pressure, if the negative pressure is formed too fast and is about to exceed the safety value, the device immediately activates the passive safety valve to supply air to the space between the suction cup and the fetal head through the air extraction port of the passive safety valve. Once the internal negative pressure value reaches the safe range, the passive safety valve will automatically close, and no pressure relief will occur to cause the suction cup to disengage. The internal negative pressure value is always controlled within the safe range through the passive safety valve.

[0017] (III) Beneficial effects

[0018] The present invention provides a fetal head vacuum suction device, which has the following beneficial effects:

[0019] 1. Through the provided closing device, pushing the push plate can close and reduce the suction cup with the guide rod, reducing the uncomfortable feeling on the mother body when the suction cup is inserted into the mother body. The closing component can be opened after the suction cup enters the mother body through the clamping component to restore the shape of the suction cup.

[0020] 2. The provided waterproof probe, wire and USB connector can observe the traction position in real time during the traction process, and pressure relief treatment can be carried out in the first time when an accident is found, which can protect the fetal head to the greatest extent.

[0021] 3. The provided passive safety valve can always control the internal negative pressure within the safe range and will not exceed the safety value, avoiding damage to the fetal head.

[0022] 4. The provided anti-slip components, namely the first anti-slip rubber sleeve and the second anti-slip rubber sleeve, can prevent slipping during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the overall structure of the present invention in the state where the suction cups are retracted;

[0025] Figure 3 is a partial cross-sectional view of the main through pipe and the suction cups of the present invention;

[0026] Figure 4 is the present invention Figure 3 -A partial enlarged view;

[0027] Figure 5 is the present invention Figure 3 -B partial enlarged view;

[0028] Figure 6 is a partial cross-sectional view of the handle and the front box of the present invention;

[0029] Figure 7 is a cross-sectional view of the main through pipe of the present invention;

[0030] Figure 8 is a partial cross-sectional view of the side of the baffle and the annular clamping member of the present invention;

[0031] Figure 9 is a schematic diagram of the structure of the annular clamping member of the present invention;

[0032] Figure 10 is a schematic diagram of the structure of the baffle of the present invention.

[0033] Among them, 1. Handle; 2. Front box; 3. Main through pipe; 4. Suction cup; 5. Upper support pipe; 6. Lower support pipe; 7. Support rod; 8. Pressure handle; 9. First anti-slip rubber sleeve; 10. Second anti-slip rubber sleeve; 11. Active safety valve; 12. Negative pressure gauge; 13. Air extraction port; 14. Wire; 15. End cover; 16. Push plate; 17. Baffle; 18. First spring; 19. Guide rod; 20. Annular clamping member; 21. Guide blind hole; 22. First intake pipe; 23. First air extraction pipe; 24. Waterproof probe; 25. Sealing filling layer; 26. Second spring; 27. Block; 28. Negative pressure generating pump; 29. Second intake pipe; 30. Second air extraction pipe; 31. First three-way joint; 32. Second three-way joint; 33. Passive safety valve; 34. Buckle; 35. USB joint; 36. Ring groove. DETAILED DESCRIPTION OF THE INVENTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example:

[0036] like Figure 1-10 As shown, an embodiment of the present invention provides a fetal head vacuum suction device, including a handle 1, a front box 2, a main through pipe 3, and a suction cup 4 are fixedly connected to the left side wall of the handle 1 in sequence, the handle 1 and the front box 2 are fixedly connected via an upper support tube 5 and a lower support tube 6, the upper support tube 5 is arranged above the lower support tube 6, the top and bottom of the handle 1 are both threadedly connected with an end cap 15, a negative pressure generating component and an active safety component are arranged on the inner side of the handle 1, and an anti-skid component for preventing slipping is arranged on the outer side of the handle 1 and the negative pressure generating component, a passive safety component, a first three-way joint 31, and a second three-way joint 32 are fixedly connected to the inner side of the front box 2 from top to bottom, a negative pressure gauge 12 is fixedly connected to the front wall of the front box 2, the outer wall of the negative pressure gauge 12 passes through the front wall of the front box 2 to the inner side and is fixedly connected to the front interface of the second three-way joint 32, the lower interface of the second three-way joint 32 is fixedly connected to the negative pressure generating component, the upper interface of the first three-way joint 31 is fixedly connected to the passive safety component, and the right interface of the first three-way joint 31 is fixedly connected to the active safety component. The components are fixedly connected, and the first air inlet pipe 22, the first air extraction pipe 23, and the visual component are fixedly connected to the inner side of the main through-tube 3. A sealing filling layer 25 is arranged between the first air inlet pipe 22, the first air extraction pipe 23, the visual component and the inner side wall of the main through-tube 3. The ends of the first air inlet pipe 22 and the first air extraction pipe 23 facing the suction cup 4 are both connected to the inner side of the suction cup 4. The outer walls of the ends of the first air inlet pipe 22 and the first air extraction pipe 23 away from the suction cup 4 are both passed through the side wall of the front box 2 to the inner side. The first air inlet pipe 22 is away from the suction cup 4. The end of the disc 4 is fixedly connected to the left interface of the first three-way joint 31, the end of the first exhaust pipe 23 away from the suction cup 4 is fixedly connected to the upper interface of the second three-way joint 32, the inner wall of the suction cup 4 is provided with a plurality of groups of guide blind holes 21, the openings of the plurality of groups of guide blind holes 21 are all facing the front box 2, and the outer wall of the main through pipe 3 is provided with a folding device for folding the suction cup 4, the folding device is slidably connected to the plurality of groups of guide blind holes 21, and the folding device is provided with a clamping component for fixing the folding device at the outer wall position of the main through pipe 3.

[0037] The negative pressure generating assembly includes a negative pressure generating pump 28, a support rod 7, and a second air extraction pipe 30. The negative pressure generating pump 28 is fixedly connected to the inside of the handle 1. The negative pressure generating pump 28 is arranged between the upper inner wall and the lower inner wall of the handle 1. The second air extraction pipe 30 is fixedly connected to the side wall of the negative pressure generating pump 28. The outer wall of the end of the second air extraction pipe 30 away from the negative pressure generating pump 28 sequentially penetrates the left side wall of the handle 1, the inner side wall of the lower support pipe 6, and the right side wall of the front box 2 to the inside of the front box 2. The end of the second air extraction pipe 30 away from the negative pressure generating pump 28 is fixedly connected to the lower side interface of the second three-way joint 32. The support rod 7 is slidably connected to the side wall of the negative pressure generating pump 28 away from the second air extraction pipe 30. The outer wall of the end of the support rod 7 away from the negative pressure generating pump 28 penetrates the right side wall of the handle 1. A pressure handle 8 is fixedly connected to the end of the support rod 7 away from the negative pressure generating pump 28. Negative pressure is generated between the suction cup 4 and the fetal head by the negative pressure generating pump 28 for traction.

[0038] The anti-slip assembly includes a first anti-slip rubber sleeve 9 and a second anti-slip rubber sleeve 10. The first anti-slip rubber sleeve 9 is sleeved on the outer wall of the pressure handle 8. The second anti-slip rubber sleeve 10 is sleeved on the outer wall of the handle 1. The anti-slip assembly can prevent the hand from slipping on the outer walls of the handle 1 and the pressure handle 8 during operation.

[0039] The active safety assembly includes an active safety valve 11 and a second air inlet pipe 29. The active safety valve 11 is fixedly connected to the left inner wall of the handle 1. The outer wall of the button of the active safety valve 11 penetrates the left side wall of the handle 1. The second air inlet pipe 29 is fixedly connected to the top of the active safety valve 11. The outer wall of the end of the second air inlet pipe 29 away from the active safety valve 11 sequentially penetrates the left side wall of the handle 1, the inner side wall of the upper support pipe 5, and the right side wall of the front box 2 to the inside of the front box 2. The end of the second air inlet pipe 29 away from the active safety valve 11 is fixedly connected to the right side interface of the first three-way joint 31. The function of the active safety valve 11 is to intake air to remove the negative pressure between the suction cup 4 and the fetal head in case of an accident and after the traction work is completed, so that the suction cup 4 is separated from the fetal head.

[0040] The passive safety assembly includes a passive safety valve 33 and an air extraction port 13. The passive safety valve 33 is fixedly connected to the left inner wall of the front box 2. The passive safety valve 33 is arranged on the inner side wall of the front box 2 and above the first three-way joint 31. The passive safety valve 33 is fixedly connected to the upper side interface of the first three-way joint 31. The air extraction port 13 is fixedly connected to the side of the front box 2 away from the handle 1. The air extraction port 13 is arranged on the side wall of the front box 2 and above the main pipe 3. The outer wall of the air extraction port 13 penetrates the side wall of the front box 2. The end of the air extraction port 13 extending into the front box 2 is fixedly connected to the passive safety valve 33. The inside of the passive safety valve 33 is a microporous film, which will open only when the pressure value reaches a certain level and will automatically close when the pressure value drops. The opening and closing pressure value of this microporous film is selected according to the safety value during fetal head traction.

[0041] The retracting device includes a push plate 16, a baffle 17, a first spring 18, and multiple groups of guide rods 19. The baffle 17 is fixedly connected to the outer wall of the main through pipe 3. The baffle 17 is arranged on the outer wall of the main through pipe 3 and at one end close to the suction cup 4. The push plate 16 is slidably connected to the outer wall of the main through pipe 3. The push plate 16 is arranged on the outer wall of the main through pipe 3 and between the baffle 17 and the front box 2. Multiple groups of guide rods 19 are fixedly connected to the side of the push plate 16 facing the baffle 17. The multiple groups of guide rods 19 are circularly arrayed on the side wall of the push plate 16. The outer walls of the ends of the multiple groups of guide rods 19 away from the push plate 16 penetrate through the baffle 17. The ends of the multiple groups of guide rods 19 away from the push plate 16 are slidably connected to multiple groups of guiding blind holes 21. The first spring 18 is sleeved on the outer wall of the main through pipe 3 and between the push plate 16 and the baffle 17. By inserting the guide rods 19 into the guiding blind holes 21 on the inner wall of the suction cup 4, the suction cup 4 can be retracted inward and reduced in size.

[0042] The clamping component includes an annular clamping piece 20, a second spring 26, a buckle 34, and a stopper 27. The stopper 27 is fixedly connected to the outer wall of the lowermost group among the multiple groups of guide rods 19. The stopper 27 is arranged on the outer wall of the lowermost group among the multiple groups of guide rods 19 and at a position close to the push plate 16. A ring groove 36 is arranged on the outer wall of the baffle 17. The annular clamping piece 20 is slidably connected to the inner side of the ring groove 36. The second spring 26 is arranged between the upper inner wall of the annular clamping piece 20 and the ring groove 36. The buckle 34 is fixedly connected to the lower inner wall of the annular clamping piece 20. The clamping component can position the retracting device during operation.

[0043] The visual component includes a waterproof probe 24, a wire 14, and a USB connector 35. The waterproof probe 24 is fixedly connected to the inner wall of the main through pipe 3 and at one end close to the suction cup 4. The wire 14 is fixedly connected to the end of the waterproof probe 24 facing the front box 2. The outer wall of the end of the wire 14 away from the waterproof probe 24 sequentially penetrates through the inside of the main through pipe 3, the left wall of the front box 2, the lower wall of the front box 2 to the lower side of the front box 2. The USB connector 35 is fixedly connected to the end of the wire 14 away from the waterproof probe 24. Through the waterproof probe 24, the part of the fetal head being tractioned can be observed in real time, and corresponding treatment measures can be taken immediately in case of an accident.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Vacuum extraction device for fetal head, comprising a handle (1), characterized in that: The left side wall of the handle (1) is fixedly connected with a front box (2), a main through pipe (3), and a suction cup (4) in sequence. The handle (1) and the front box (2) are fixedly connected via an upper support pipe (5) and a lower support pipe (6). The upper support pipe (5) is arranged above the lower support pipe (6). The top and bottom of the handle (1) are both threadedly connected with end caps (15). The inside of the handle (1) is provided with a negative pressure generating component and an active safety component. The outside of the handle (1) and the negative pressure generating component are both provided with anti-skid components for preventing slipping. The inside of the front box (2) is fixedly connected with the main through pipe (3) and the suction cup (4) in sequence from top to bottom. A passive safety component, a first three-way joint (31), and a second three-way joint (32) are fixedly connected; a negative pressure gauge (12) is fixedly connected to the front wall of the front box (2); an outer wall of the negative pressure gauge (12) passes through the front wall of the front box (2) to the inside and is fixedly connected to the front interface of the second three-way joint (32); a lower interface of the second three-way joint (32) is fixedly connected to the negative pressure generating component; an upper interface of the first three-way joint (31) is fixedly connected to the passive safety component; a right interface of the first three-way joint (31) is fixedly connected to the active safety component; an inner wall of the main through pipe (3) is fixedly connected to the negative pressure generating component; A first air inlet pipe (22), a first air extraction pipe (23), and a visual component are fixedly connected to the front box (2); a sealing filling layer (25) is provided between the first air inlet pipe (22), the first air extraction pipe (23), the visual component, and the inner side wall of the main through pipe (3); the ends of the first air inlet pipe (22) and the first air extraction pipe (23) facing the suction cup (4) are both connected to the inner side of the suction cup (4); the outer walls of the ends of the first air inlet pipe (22) and the first air extraction pipe (23) away from the suction cup (4) are both passed through the side wall of the front box (2) to the inner side; the end of the first air inlet pipe (22) away from the suction cup (4) is The suction cup (4) is fixedly connected to the left interface of the first three-way joint (31); the end of the first exhaust pipe (23) away from the suction cup (4) is fixedly connected to the upper interface of the second three-way joint (32); the inner wall of the suction cup (4) is provided with a plurality of guide blind holes (21); the openings of the plurality of guide blind holes (21) are all oriented toward the front box (2); the outer wall of the main through pipe (3) is provided with a retracting device for retracting the suction cup (4); the retracting device is slidably connected to the plurality of guide blind holes (21); and the retracting device is provided with a clamping assembly for fixing the retracting device at the outer wall of the main through pipe (3).

2. The fetal head vacuum aspiration device according to claim 1, characterized in that: The negative pressure generating assembly includes a negative pressure generating pump (28), a support rod (7), and a second air extraction pipe (30). The negative pressure generating pump (28) is fixedly connected to the inner side of the handle (1). The negative pressure generating pump (28) is arranged between the upper inner wall and the lower inner wall of the handle (1). The second air extraction pipe (30) is fixedly connected to the side wall of the negative pressure generating pump (28). The outer wall of the end of the second air extraction pipe (30) away from the negative pressure generating pump (28) sequentially penetrates through the left side wall of the handle (1), the inner side wall of the lower support pipe (6), and the right side wall of the front box (2) to the inside of the front box (2). The end of the second air extraction pipe (30) away from the negative pressure generating pump (28) is fixedly connected to the lower side interface of the second three-way joint (32). The support rod (7) is slidably connected to the side wall of the negative pressure generating pump (28) away from the second air extraction pipe (30). The outer wall of the end of the support rod (7) away from the negative pressure generating pump (28) penetrates through the right side wall of the handle (1). The end of the support rod (7) away from the negative pressure generating pump (28) is fixedly connected to a pressure handle (8).

3. The fetal head vacuum aspiration device according to claim 2, characterized in that: The anti-slip assembly includes a first anti-slip rubber sleeve (9) and a second anti-slip rubber sleeve (10). The first anti-slip rubber sleeve (9) is sleeved on the outer wall of the pressure handle (8). The second anti-slip rubber sleeve (10) is sleeved on the outer wall of the handle (1).

4. The fetal head vacuum aspiration device according to claim 3, characterized in that: The active safety assembly includes an active safety valve (11) and a second air inlet pipe (29). The active safety valve (11) is fixedly connected to the left inner wall of the handle (1). The outer wall of the button of the active safety valve (11) penetrates through the left side wall of the handle (1). The second air inlet pipe (29) is fixedly connected to the top of the active safety valve (11). The outer wall of the end of the second air inlet pipe (29) away from the active safety valve (11) sequentially penetrates through the left side wall of the handle (1), the inner side wall of the upper support pipe (5), and the right side wall of the front box (2) to the inside of the front box (2). The end of the second air inlet pipe (29) away from the active safety valve (11) is fixedly connected to the right side interface of the first three-way joint (31).

5. The fetal head vacuum aspiration device according to claim 4, wherein: The passive safety assembly includes a passive safety valve (33) and an air extraction port (13). The passive safety valve (33) is fixedly connected to the left inner wall of the front box (2). The passive safety valve (33) is arranged on the inner side wall of the front box (2) and above the first three-way joint (31). The passive safety valve (33) is fixedly connected to the upper side interface of the first three-way joint (31). The air extraction port (13) is fixedly connected to the side of the front box (2) away from the handle (1). The air extraction port (13) is arranged on the side wall of the front box (2) and above the main pipe (3). The outer wall of the air extraction port (13) penetrates through the side wall of the front box (2). The end of the air extraction port (13) extending into the front box (2) is fixedly connected to the passive safety valve (33).

6. The fetal head vacuum aspiration device according to claim 5, wherein: The retracting device includes a push plate (16), a baffle (17), a first spring (18), and multiple groups of guide rods (19). The baffle (17) is fixedly connected to the outer wall of the main through pipe (3). The baffle (17) is arranged on the outer wall of the main through pipe (3) and at one end close to the suction cup (4). The push plate (16) is slidably connected to the outer wall of the main through pipe (3). The push plate (16) is arranged on the outer wall of the main through pipe (3) and between the baffle (17) and the front box (2). Multiple groups of the guide rods (19) are fixedly connected to the side of the push plate (16) facing the baffle (17). Multiple groups of the guide rods (19) are circularly arrayed on the side wall of the push plate (16). The outer walls of the ends of multiple groups of the guide rods (19) far from the push plate (16) penetrate through the baffle (17). The ends of multiple groups of the guide rods (19) far from the push plate (16) are slidably connected to multiple groups of guiding blind holes (21). The first spring (18) is sleeved on the outer wall of the main through pipe (3) and between the push plate (16) and the baffle (17).

7. The fetal head vacuum aspiration device according to claim 6, wherein: The clamping assembly includes an annular clamping member (20), a second spring (26), a buckle (34), and a stop block (27). The stop block (27) is fixedly connected to the outer wall of the lowermost group among multiple groups of the guide rods (19). The stop block (27) is arranged on the outer wall of the lowermost group among multiple groups of the guide rods (19) and at a position close to the push plate (16). A ring groove (36) is arranged on the outer wall of the baffle (17). The annular clamping member (20) is slidably connected to the inner side of the ring groove (36). The second spring (26) is arranged between the upper inner wall of the annular clamping member (20) and the ring groove (36). The buckle (34) is fixedly connected to the lower inner wall of the annular clamping member (20).

8. The fetal head vacuum aspiration device according to claim 7, wherein: The visual component includes a waterproof probe (24), a wire (14), and a USB connector (35). The waterproof probe (24) is fixedly connected to the inner wall of the main through pipe (3) and at one end close to the suction cup (4). The wire (14) is fixedly connected to the end of the waterproof probe (24) facing the front box (2). The outer wall of the end of the wire (14) far from the waterproof probe (24) sequentially penetrates through the inside of the main through pipe (3), the left wall of the front box (2), the lower wall of the front box (2) to the lower side of the front box (2). The USB connector (35) is fixedly connected to the end of the wire (14) far from the waterproof probe (24).

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