Anti-blocking abdominal cavity aspirator

Abstract

The invention relates to the field of abdominal cavity aspirators, in particular to an anti-blocking abdominal cavity aspirator, and solves the technical problems that the negative pressure of the abdominal cavity aspirator is inconvenient to control in the using process, and normal operation is affected. According to the technical scheme, the anti-blocking abdominal cavity aspirator comprises a negative pressure generator, a liquid suction head, a hose, a seat plate, an end plate, a pedal, a spring cover, a protective cover, a driving gear, a driven gear, a rack, a valve head assembly and a pressure control mechanism. The device for controlling the magnitude of the negative pressure in a pedal mode is arranged between an original abdominal cavity aspirator and a hospital negative pressure system, once the liquid suction head adsorbs abdominal cavity tissue to cause blockage, the negative pressure can be adjusted to be small in time, the abdominal cavity tissue is removed, and the abdominal cavity tissue is prevented from being damaged; the pedal type pressure regulating device is convenient to use, provides great convenience for laparoscopic surgery, and solves the problems that the negative pressure is inconvenient to control in the using process of an abdominal cavity aspirator, and normal operation of the surgery is affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of abdominal cavity aspirator, in particular to a kind of anti-blocking abdominal cavity aspirator. BACKGROUND

[0002] In laparoscopic surgery, bleeding and intraoperative abdominal cavity effusion need to be promptly aspirated using abdominal cavity aspirator, so as to avoid abdominal fluid accumulation, affect the surgical vision and interfere with the surgical operation. The working principle of such abdominal cavity aspirator is to use a tubular tool connected to the hospital's negative pressure system to adhere to the accumulated fluid and blood on the patient's abdominal cavity tissue and aspirate them out.

[0003] Such aspirator is very common in laparoscopic surgery and is a necessary and critical medical device to ensure normal operation. However, the existing laparoscopic aspirator has a defect that the negative pressure is not easy to control. When the suction port is in the open state, it is easy to suck the patient's abdominal cavity tissue, causing the aspirator to be blocked. If the negative pressure is too large, it can easily cause the patient's abdominal cavity tissue to be sucked and broken, causing great surgical risk. If a simple pressure relief hole is provided on the aspirator to control the size of the negative pressure by controlling the opening degree of the pressure relief hole, it can cause a lot of noise at the pressure relief hole, affecting the communication during the operation. Moreover, if the position of the pressure relief hole is not good, it can also cause the pressure relief hole to suck other parts during the operation.

[0004] Therefore, in view of the above-mentioned problem of abdominal cavity aspirator that the size of negative pressure is not convenient to control during use, a foot-operated control negative pressure suction abdominal cavity aspirator can be designed to facilitate the doctor to control the size of the aspirator negative pressure by a series of actions such as light stepping, heavy stepping and foot releasing during the operation. SUMMARY

[0005] In order to overcome the problem of abdominal cavity aspirator that the size of negative pressure is not convenient to control during use, affecting the normal operation of the operation.

[0006] The technical scheme of the present application is: a kind of anti-blocking abdominal cavity aspirator, including negative pressure generator, liquid suction head, hose, seat plate, end plate, pedal, spring cover, protective cover, driving gear, driven gear, rack, valve head assembly, pressure control mechanism;Negative pressure generator is hospital negative pressure system equipment, seat plate is fixedly installed on the bed frame of operating bed by anchor bolt, the end of seat plate opposite to operating bed is integrally connected with vertical end plate, pedal is arranged on seat plate, one end of pedal is rotatably connected with end plate by pin shaft, spring cover is installed between the lower end of pedal and seat plate, protective cover is installed on the side of end plate above pin shaft, driving gear is fixedly installed on pin shaft, driving gear extends into protective cover through the opening below protective cover, driven gear is rotatably installed in protective cover and is engaged with driving gear, rack is slidably connected on the inner wall of protective cover and is engaged with driven gear, valve head assembly with three channel openings is installed on protective cover, two channel openings are outside protective cover, and the third channel opening is inside protective cover, two channel openings outside protective cover are connected with negative pressure generator and hose respectively, liquid suction head is connected to the other end of hose, pressure control mechanism is installed on rack and extends into the third channel opening inside protective cover, rack drives pressure control mechanism to move longitudinally to open and close valve head assembly.

[0007] Preferably, the doctor's feet are placed on the pedal, and the liquid suction head is held by the doctor to aim at the blood and tissue fluid in the patient's abdominal cavity, and the negative pressure generator is started to suck the liquid into the liquid storage tank, when the abdominal cavity tissue is adsorbed by the liquid suction head and blocks the liquid suction head, the doctor's feet are used to step on or release the pedal, to drive the pressure control mechanism to close or reduce the opening of the valve head assembly, to achieve the purpose of pressure reduction, so that the abdominal cavity tissue can be timely released from the liquid suction head.

[0008] As preferred, longitudinal sliding groove is formed on the inner wall of protective cover, back plate is fixedly connected to the side of rack facing the inner wall of protective cover, sliding block is fixedly installed on back plate and slidably connected in sliding groove, silicon rubber pad is arranged on the upper and lower ends of sliding block and has arc convex shape, through the sliding connection structure of sliding groove and sliding block, rack can stably slide longitudinally along the inner wall of protective cover, to avoid moving in other directions, causing gear transmission failure, and using the flexible material of silicon rubber pad, when sliding block moves to the end of sliding groove, it can play a buffering role, to protect the structure from impact damage, in actual use, slide rail, guide column and other structures can be used instead of sliding groove and sliding block in the present scheme, which can achieve the same effect.

[0009] Preferably, the valve head assembly includes a first chamber and a first diverter. An installation port is provided at the upper end of the protective cover, into which the first chamber is inserted. The upper and lower ends of the first chamber are interconnected, forming two channels. A Y-shaped first diverter is fixedly connected to the side wall of the first chamber outside the protective cover. The first diverter has two longitudinally adjacent upper and lower orifices at its connection with the first chamber. The upper channel of the first chamber is connected to a flexible hose, and the first diverter is connected to a negative pressure generator. The negative pressure generator forms a continuous air intake channel through the first chamber, the flexible hose, and the suction head. Through suction, a negative pressure is generated within the air intake channel. Using the Y-shaped first diverter, if both the upper and lower orifices are open, the airflow is greater, and the resulting negative pressure intensity is also greater. When one orifice is closed, the negative pressure intensity is halved.

[0010] Preferably, the pressure control mechanism includes a No. 1 top plate, a No. 1 shaft, and a No. 1 plug. The No. 1 top plate is bolted to the upper end of the rack. The upper end of the No. 1 top plate is fixedly connected to the No. 1 shaft, which extends into the lower end of the No. 1 pipe cavity. The upper end of the No. 1 shaft is fixedly installed with the No. 1 plug tightly against the inner wall of the No. 1 pipe cavity. The No. 1 plug abuts against the lower orifice and seals it. When the pedal is in the initial state, the rack is at its highest position, and the No. 1 plug remains blocking the lower orifice. Only the upper orifice is connected to the No. 1 pipe cavity, and the negative pressure in the intake passage is at its maximum. At half the maximum pressure, when the doctor steps on the pedal, the driving gear, driven gear, and rack drive each other, causing the rack to move downwards. This causes the No. 1 shaft and No. 1 plug to gradually move away from the lower orifice, opening both the upper and lower orifices. The negative pressure returns to its maximum value, and the suction becomes stronger. When the doctor releases the pedal, the spring cover returns to its original position, lifting the pedal. Through the reverse transmission between the driving gear, driven gear, and rack, the No. 1 shaft and No. 1 plug rise again, gradually closing the lower orifice again, and the negative pressure shrinks back to half of its maximum value.

[0011] Preferably, the valve head assembly includes a second cavity and a second diverter. An installation port is provided at the lower end of the protective cover, into which the second cavity is inserted. The upper and lower ends of the second cavity are interconnected, forming two channels. A Y-shaped diverter is fixedly connected to the side wall of the second cavity outside the protective cover. The diverter connects to the second cavity with two longitudinally adjacent upper and lower orifices. The lower orifice of the second cavity is connected to a flexible hose. The diverter is connected to a negative pressure generator. The negative pressure generator forms a continuous air intake channel through the second cavity, the flexible hose, and the suction head. Through suction, a negative pressure is created within the air intake channel. Using the Y-shaped diverter, if both the upper and lower orifices are open, the airflow is greater, and the resulting negative pressure intensity is also greater. When one orifice is closed, the negative pressure intensity is halved.

[0012] Preferably, the pressure control mechanism includes a second top plate, a second shaft, and a second plug. The second top plate is bolted to the lower end of the rack. The lower end of the second top plate is fixedly connected to the second shaft, which extends into the upper end of the second pipe cavity. The lower end of the second shaft is fixedly installed with the second plug, which is close to the inner wall of the second pipe cavity. The second plug is positioned above the upper orifice. When the pedal is in the initial state, the rack is at its highest point, both the upper and lower orifices are fully open and connected to the second pipe cavity, and the negative pressure in the intake channel is at its maximum. When the doctor steps on the pedal, the driving gear, driven gear, and rack drive each other, causing the rack to move downwards, which in turn causes the second shaft and the second plug to move downwards, gradually closing the upper orifice. At this point, only the lower orifice is open, and the negative pressure is reduced to half of the maximum pressure value, thus reducing the suction. When the doctor releases the pedal, the spring cover returns to its original position, lifting the pedal up. Through the reverse transmission between the driving gear, driven gear, and rack, the second shaft and the second plug rise again, gradually opening the upper orifice, and the negative pressure returns to the maximum pressure value.

[0013] Preferably, the valve head assembly includes a third chamber, a third direct head, a limiting plate, and a spring washer. An installation port is provided at the upper end of the protective cover, into which the third chamber is inserted. The upper and lower ends of the third chamber are interconnected, forming two channels. The third direct head is fixedly connected to the side wall of the third chamber outside the protective cover. An orifice is provided at the junction of the third direct head and the third chamber. The channel at the upper end of the third chamber is connected to a flexible hose. The third direct head is connected to a negative pressure generator. A limiting plate is fixedly connected to the inner side of the third chamber below the orifice, and a spring washer is provided on the limiting plate. When the orifice is open, the negative pressure generator forms a continuous air intake channel through the third chamber, the flexible hose, and the suction head. Negative pressure is created in the air intake channel through suction. When the orifice is closed, the air intake channel is disconnected, and the suction force of the suction head is interrupted.

[0014] Preferably, the pressure control mechanism includes a No. 3 top plate, a No. 3 shaft, and a No. 3 plug. The No. 3 top plate is bolted to the upper end of the rack. A No. 3 shaft, extending into the lower end of the No. 3 tube cavity, is fixedly connected to the upper end of the No. 3 top plate. The No. 3 shaft extends upwards and passes above the limiting plate. A No. 3 plug, tightly against the inner wall of the No. 3 tube cavity, is fixedly installed on the upper end of the No. 3 shaft. The No. 3 plug is positioned above the spring washer and abuts against the orifice, sealing it. The height of the spring washer is equal to the length of the No. 3 plug. When the pedal is in its initial state, the rack is at its highest point, the orifice is blocked by the No. 3 plug, and the air intake channel is disconnected, preventing the liquid suction head from... With suction, the device is in a stopped state. The doctor lightly presses the pedal, and the driving gear, driven gear, and rack drive each other, causing the rack to move downwards, which in turn moves the No. 3 shaft and No. 3 plug downwards, compressing the spring washer until the No. 3 plug abuts against the limit plate. At this point, the orifice is fully open, the air intake channel is connected, the device starts, and negative pressure is formed. When the doctor releases the pedal, the spring cover returns to its original position, lifting the pedal. Through the reverse transmission between the driving gear, driven gear, and rack, plus the return of the spring washer, the No. 3 shaft and No. 3 plug rise again, gradually closing the orifice. The negative pressure gradually decreases until the air intake channel is disconnected, and the negative pressure completely disappears.

[0015] The beneficial effects of this invention are: 1. By installing a foot-operated device to control the negative pressure between the existing abdominal suction device and the hospital's negative pressure system, the doctor can easily control the suction pressure without using their hands during the operation. If the suction head causes blockage due to the adhesion of abdominal tissue, the negative pressure can be reduced in time to remove the abdominal tissue and effectively prevent damage to the abdominal tissue. Compared with the original suction device that cannot adjust the negative pressure, this foot-operated pressure adjustment device is convenient to use and provides great convenience for laparoscopic surgery. 2. Using a gear and rack as the drive unit for the pressure control mechanism results in a simple and effective structure with high transmission efficiency and low susceptibility to failure. 3. Depending on the type of surgery, the equipment can be installed in a suitable position on the operating table frame during actual use, always ensuring it is close to the doctor's surgical operating area for easy control. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural diagram of the overall assembly of the anti-blockage abdominal suction device of the present invention. Figure 2 The diagram shown is a three-dimensional structural diagram of the internal structure of the protective cover of the anti-blockage abdominal suction device according to Embodiment 1 of the present invention; Figure 3 The diagram shown is a schematic cross-sectional view of the internal structure of the protective cover of an embodiment of the anti-blockage abdominal suction device of the present invention. Figure 4The diagram shown is a three-dimensional structural schematic of the pressure control mechanism and valve head assembly of an embodiment of the anti-blockage abdominal suction device of the present invention; Figure 5 The diagram shown is a three-dimensional structural diagram of the overall assembly of the anti-blockage abdominal suction device of the present invention, embodiment two; Figure 6 The diagram shown is a three-dimensional structural diagram of the internal structure of the protective cover of the anti-blockage abdominal suction device according to Embodiment 2 of the present invention; Figure 7 The diagram shown is a cross-sectional view of the internal structure of the protective cover of Embodiment 2 of the anti-blockage abdominal suction device of the present invention; Figure 8 The diagram shown is a three-dimensional structural schematic of the pressure control mechanism and valve head assembly of Embodiment 2 of the anti-blockage abdominal suction device of the present invention; Figure 9 The diagram shown is a three-dimensional structural diagram of the overall assembly of the anti-blockage abdominal suction device of the present invention, embodiment three. Figure 10 The diagram shown is a three-dimensional structural diagram of the internal structure of the protective cover of Embodiment 3 of the anti-blockage abdominal suction device of the present invention; Figure 11 The diagram shown is a three-dimensional cross-sectional view of the internal structure of the protective cover of Embodiment 3 of the anti-blockage abdominal suction device of the present invention; Figure 12 The diagram shown is a three-dimensional structural schematic of the pressure control mechanism and valve head assembly of Embodiment 3 of the anti-blockage abdominal suction device of the present invention; Figure 13 The diagram shown is a three-dimensional structural schematic of the gear transmission structure of the anti-blockage abdominal suction device of the present invention. Figure 14 The diagram shown is a three-dimensional schematic of the sliding guide structure of the anti-blockage abdominal suction device of the present invention.

[0017] Explanation of reference numerals in the attached diagram: 1. Seat plate; 2. End plate; 3. Pedal; 4. Spring cover; 5. Protective cover; 6. Drive gear; 7. Driven gear; 8. Rack; 11. Suction head; 12. Hose; 13. Slide groove; 14. Back plate; 15. Slider; 901. No. 1 cavity; 902. No. 1 diverter; 903. No. 2 cavity; 904. No. 2 diverter; 905. No. 3 cavity; 906. No. 3 direct head; 907. Limiting plate; 908. Spring washer; 1001. No. 1 top plate; 1002. No. 1 shaft; 1003. No. 1 plug; 1004. No. 2 top plate; 1005. No. 2 shaft; 1006. No. 2 plug; 1007. No. 3 top plate; 1008. No. 3 shaft; 1009. No. 3 plug. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] I. The rationality of the technical problem Currently, laparoscopic suction devices commonly used in clinical practice have a multi-port design at the front end. This design presents several drawbacks in clinical use: 1. When suctioning blood or irrigating the abdominal cavity, soft tissues such as the omentum, mesentery, or fragmented tissue often block the side or main ports at the front end of the suction device, preventing continuous use and indirectly increasing surgical time. This is highly detrimental to the surgical patient. 2. In cases of intra-abdominal bleeding, especially with particularly large or rapid bleeding, the inability to quickly and promptly aspirate blood leads to an unclear surgical field, hindering timely hemostasis or emergency procedures and increasing surgical risks.

[0020] II. Rationality of the Technical Solution (I) Precisely Addressing Existing Technical Pain Points with High Targeted Approach: The core problem with existing abdominal suction devices is the difficulty in controlling negative pressure in real time, which can easily lead to blockage or tissue damage due to tissue adsorption. Furthermore, traditional pressure relief port designs suffer from drawbacks such as high noise levels and the tendency to attract foreign objects. This solution utilizes a foot-operated mechanical adjustment structure, allowing doctors to control negative pressure in real time without manual operation: when the pedal is pressed or released, the gear-rack transmission drives the pressure control mechanism to change the opening degree of the valve head assembly's orifice, directly adjusting the negative pressure level (e.g., double-hole opening controls to halve or maximize negative pressure, while single-hole opening controls the presence or absence of negative pressure). This design fundamentally avoids the interference of manual operation on the surgery and eliminates the noise and foreign object adsorption problems associated with pressure relief ports, precisely addressing the core pain point of "inconvenient negative pressure control."

[0021] (II) Stable and efficient mechanical structure design, adaptable to medical scenario requirements. Reliable transmission system: Utilizing a meshing transmission of driving gears, driven gears, and racks, the rotational motion of the pedal is converted into the longitudinal linear motion of the rack. This results in high transmission efficiency, rapid response, and a simple structure that is less prone to failure, meeting the "stability first" requirement for medical equipment. Reasonable guidance and buffering design: The sliding groove inside the protective cover cooperates with the rack and slider to ensure stable longitudinal sliding of the rack and prevent transmission deviation. The silicone pads at both ends of the slider buffer impacts, reducing mechanical wear and extending equipment life. Reliable reset mechanism: The spring cover between the pedal and the seat plate not only supports the pedal but also automatically resets when the pedal is released, ensuring the immediacy and repeatability of negative pressure adjustment, meeting the "rapid adjustment" needs during surgery.

[0022] (III) Multiple Solutions Adaptable to Different Surgical Scenarios, High Flexibility The solution provides three combinations of valve head components and pressure control mechanisms (Examples 1 to 3) to cover different negative pressure adjustment needs: Example 1: Initial negative pressure is half of the maximum value; after stepping, both holes are fully opened to achieve maximum negative pressure, suitable for scenarios requiring "basic suction + enhanced suction"; Example 2: Initially at maximum negative pressure; after stepping, one hole opens to halve the negative pressure, suitable for scenarios requiring "strong suction + rapid decompression"; Example 3: Initially no negative pressure; after stepping, one hole fully opens to achieve negative pressure, suitable for scenarios requiring "suction to be activated on demand". This multi-solution design allows for flexible selection based on surgical type (such as degree of bleeding, tissue sensitivity), improving the device's adaptability.

[0023] (iv) The operation logic aligns with the surgical procedure, offering high practicality. Foot pedal control frees up the hands: When operating with the suction head, the doctor can adjust the negative pressure in real time through foot movements (lightly pressing, pressing hard, releasing), without interrupting hand operations, meeting the core requirement of "focused operation with both hands" during surgery. The installation layout is reasonable: fixed to the operating table frame by the seat board, close to the doctor's operating area for easy and immediate control; the protective cover encloses the transmission components, preventing contact with surgical instruments or tissues, meeting aseptic operation requirements.

[0024] (V) Safety and Reliability Meet Medical Standards: Negative pressure adjustment is achieved through a mechanical structure (the opening and closing of the plug orifice), without reliance on electronic components, reducing the risk of sudden malfunctions during surgery. The close cooperation between the valve head assembly and the pressure control mechanism (such as the plug being tightly attached to the inner wall of the lumen) ensures precise negative pressure adjustment, avoiding tissue damage caused by adjustment delays and improving surgical safety. In summary, this solution addresses the root cause of the problem, focusing on the stability of the mechanical structure, ease of operation, and adaptability to various scenarios. It not only solves the key defects of existing suction devices but also meets the actual needs of laparoscopic surgery, demonstrating clear technical rationality and clinical value.

[0026] Please see Figures 1-14This invention provides an anti-blockage abdominal suction device, comprising a negative pressure generator, a suction head 11, a hose 12, a seat plate 1, an end plate 2, a pedal 3, a spring cover 4, a protective cover 5, a drive gear 6, a driven gear 7, a rack 8, a valve head assembly, and a pressure control mechanism. The negative pressure generator is a hospital negative pressure system device. The seat plate 1 is fixedly installed on the operating table frame by anchor bolts. A vertical end plate 2 is integrally connected to one end of the seat plate 1 facing the operating table. A pedal 3 is provided on the seat plate 1. One end of the pedal 3 is rotatably connected to the end plate 2 by a pin. A spring cover 4 is installed between the lower end of the pedal 3 and the seat plate 1. A protective cover 5 is installed on one side of the end plate 2 above the pin. A drive gear 6 is fixedly installed on the pin. The drive gear 6 extends into the protective cover 5 through an opening below the protective cover 5. A driven gear 7, which meshes with the drive gear 6, is rotatably installed inside the protective cover 5. A driven gear 7, which is slidably connected to the inner wall of the protective cover 5, is also slidably connected to the driven gear. The rack 8 is engaged with the protective cover 5, which is equipped with a valve head assembly with three ports. Two ports are located outside the protective cover 5, and the third port is located inside the protective cover 5. The two ports outside the protective cover 5 are connected to the negative pressure generator and the hose 12, respectively. The suction head 11 is connected to the other end of the hose 12. The rack 8 is equipped with a pressure control mechanism that extends into the third port inside the protective cover 5. The rack 8 drives the pressure control mechanism to move longitudinally to open and close the valve head assembly. The doctor places his foot on the pedal 3, holds the suction head 11, and aims it at the blood and tissue fluid in the patient's abdominal cavity. The negative pressure generator is activated to draw the fluid into the storage tank. When the abdominal tissue is sucked up and blocked by the suction head 11, the doctor's foot either steps on it or releases the pedal 3 to drive the pressure control mechanism, close or reduce the opening of the valve head assembly, thereby reducing pressure and allowing the abdominal tissue to be removed from the suction head 11 in time.

[0027] Please see Figures 13-14 The inner wall of the protective cover 5 has a longitudinally formed groove 13. A back plate 14 is fixedly connected to the side of the rack 8 facing the inner wall of the protective cover 5. A slider 15 is fixedly installed on the back plate 14 and slidably connected in the groove 13. Both ends of the slider 15 are provided with arc-shaped protruding silicone pads. Through the sliding connection structure of the groove 13 and the slider 15, the rack 8 can slide stably longitudinally along the inner wall of the protective cover 5, avoiding movement in other directions and causing gear transmission failure. The flexible material of the silicone pads can play a buffering role when the slider 15 moves to the end of the groove 13, protecting the structure from impact damage. In actual use, the groove 13 and slider 15 in this solution can be replaced by slide rails, guide posts, etc., and the same effect can be achieved.

[0028] Example 1: Please refer to Figures 1-4In this embodiment, the valve head assembly includes a first cavity 901 and a first diverter 902. The upper end of the protective cover 5 has an installation port, into which the first cavity 901 is inserted. The upper and lower ends of the first cavity 901 are interconnected, forming two channel openings. A Y-shaped first diverter 902 is fixedly connected to the side wall of the first cavity 901 outside the protective cover 5. The first diverter 902 and the first cavity 901 have two longitudinally adjacent upper and lower orifices at their connection. The channel opening at the upper end of the first cavity 901 is connected to the flexible hose 12. The flow connector 902 is connected to the negative pressure generator. The negative pressure generator forms a continuous air intake channel through the first chamber 901, the hose 12, and the suction head 11. Through the suction action, a negative pressure is formed in the air intake channel. Utilizing the Y-shaped flow connector 902, if both the upper and lower orifices are open, the airflow is greater, and the resulting negative pressure intensity is also greater. When one orifice is closed, the negative pressure intensity is halved. The pressure control mechanism includes a first top plate 1001, a first shaft 1002, and a first plug 1003. The first top plate 1001 is anchored to the rack by bolts. At the upper end of plate 1001, a shaft 1002 is fixedly connected to the upper end of the first top plate 1001, extending into the lower end of the first tube 901. A plug 1003 is fixedly installed on the upper end of shaft 1002, closely adhering to the inner wall of the first tube 901. The plug 1003 abuts against the lower opening and seals it. When pedal 3 is in its initial state, rack 8 is at its highest position, and plug 1003 remains blocking the lower opening. Only the upper opening connects to the first tube 901. The negative pressure in the air intake channel is half of the maximum pressure. The doctor steps on pedal 3. At this time, the driving gear 6, driven gear 7 and rack 8 drive each other, causing rack 8 to move down, so that the first shaft 1002 and the first plug 1003 gradually move away from the lower orifice. Both the upper and lower orifices are open, the negative pressure is restored to the maximum pressure value, and the suction is stronger. When the doctor releases pedal 3, spring cover 4 resets and lifts pedal 3. Through the reverse transmission between driving gear 6, driven gear 7 and rack 8, the first shaft 1002 and the first plug 1003 rise again, gradually closing the lower orifice again, and the negative pressure is reduced to half of the maximum pressure value again.

[0029] Example 2: Please refer to Figures 5-8In this embodiment, the valve head assembly includes a second cavity 903 and a second diverter 904. The lower end of the protective cover 5 has an installation port into which the second cavity 903 is inserted. The upper and lower ends of the second cavity 903 are interconnected, forming two channel openings. A Y-shaped second diverter 904 is fixedly connected to the side wall of the second cavity 903 outside the protective cover 5. The second diverter 904 and the second cavity 903 have two longitudinally adjacent upper and lower orifices at their junction. The lower channel opening of the second cavity 903 connects to the flexible hose 12. The second diverter 904 is connected to the negative pressure generator. The negative pressure generator forms a continuous air intake channel through the second cavity 903, the hose 12, and the suction head 11. Through suction, a negative pressure is created within the air intake channel. Utilizing the Y-shaped structure of the second diverter 904, if both the upper and lower orifices are open, the airflow is greater, and the resulting negative pressure intensity is also greater. When one orifice is closed, the negative pressure intensity is halved. The pressure control mechanism includes the second top plate 1004, the second shaft 1005, and the second plug 1006; the second top plate 1004... The rack 8 is bolted and anchored to its lower end. A second shaft 1005, extending into the upper end of the second tube 903, is fixedly connected to the lower end of the second top plate 1004. A second plug 1006, tightly fitted to the inner wall of the second tube 903, is fixedly installed at the lower end of the second shaft 1005. The second plug 1006 is positioned above the upper orifice. When the pedal 3 is in its initial state, the rack 8 is at its highest point, both the upper and lower orifices are fully open and connected to the second tube 903, and the negative pressure in the air intake channel is at its maximum. When the doctor steps on the pedal 3, the main... The driving gear 6, driven gear 7, and rack 8 drive each other, causing rack 8 to move downwards, which in turn causes the second shaft 1005 and the second plug 1006 to move downwards, gradually closing the upper orifice. At this time, only the lower orifice is open, and the negative pressure is reduced to half of the maximum pressure value. The suction force decreases. When the doctor releases pedal 3, spring cover 4 returns to its original position and lifts pedal 3. Through the reverse transmission between driving gear 6, driven gear 7, and rack 8, the second shaft 1005 and the second plug 1006 rise again, gradually opening the upper orifice, and the negative pressure returns to the maximum pressure value.

[0030] Example 3: Please refer to Figures 9-12In this embodiment, the valve head assembly includes a third cavity 905, a third direct head 906, a limiting plate 907, and a spring washer 908. The upper end of the protective cover 5 has an installation port, into which the third cavity 905 is inserted. The upper and lower ends of the third cavity 905 are interconnected, forming two channel openings. The third direct head 906 is fixedly connected to the side wall of the third cavity 905 outside the protective cover 5. An opening is provided at the junction of the third direct head 906 and the third cavity 905. The channel opening at the upper end of the third cavity 905 is connected to the hose 12. The third direct head 906 is connected to the negative pressure generator. A spring washer 908 is fixedly connected to the inner side of the third cavity 905. A limiting plate 907 is located below the orifice, and a spring washer 908 is installed on the limiting plate 907. When the orifice is open, the negative pressure generator forms a continuous air intake channel through the third chamber 905, the hose 12, and the suction head 11. Through the suction action, a negative pressure is formed in the air intake channel. When the orifice is closed, the air intake channel is disconnected, and the suction force of the suction head 11 is interrupted. The pressure control mechanism includes a third top plate 1007, a third shaft 1008, and a third plug 1009. The third top plate 1007 is bolted to the upper end of the rack 8. The third shaft 1008, which extends into the channel opening at the lower end of the third chamber 905, is fixedly connected to the upper end of the third top plate 1007. The shaft 1008 extends upwards and passes above the limiting plate 907. A plug 1009, tightly fitted to the inner wall of the third tube 905, is fixedly installed on the upper end of the shaft 1008. The plug 1009 is positioned above the spring washer 908, abutting against and sealing the orifice. The height of the spring washer 908 is equal to the length of the plug 1009. When the pedal 3 is in its initial state, the rack 8 is at its highest point, the orifice is blocked by the plug 1009, the air intake is disconnected, the suction head 11 has no suction, and the equipment is in a stopped state. The doctor lightly presses the pedal 3 with their foot, activating the drive gear 6 and driven gear... The gear 7 and rack 8 drive each other, causing rack 8 to move downwards, which in turn causes the third shaft 1008 and the third plug 1009 to move downwards, compressing the spring washer 908 until the third plug 1009 abuts against the limiting plate 907. At this point, the orifice is fully open, the air intake channel is connected, the equipment starts, and negative pressure is formed. When the doctor releases pedal 3, the spring cover 4 returns to its original position and lifts pedal 3. Through the reverse transmission between the driving gear 6, driven gear 7, and rack 8, plus the return of spring washer 908, the third shaft 1008 and the third plug 1009 rise again, gradually closing the orifice. The negative pressure gradually decreases until the air intake channel is disconnected and the negative pressure completely disappears.

[0031] When working, the negative pressure generator and the suction head 11 are always connected. The equipment runs continuously at half the maximum negative pressure. The doctor steps on the pedal 3. Through the transmission between the driving gear 6, the driven gear 7 and the rack 8, the rack 8 drives the first shaft 1002 and the first plug 1003 to move away from the lower opening. The airflow increases, the negative pressure increases, and the suction head 11 obtains the maximum suction force. Operating according to the technical solution in Embodiment 2, the negative pressure generator and the suction head 11 are always in a connected state, and the equipment runs continuously at the maximum negative pressure. The doctor steps on the pedal 3, and through the transmission between the driving gear 6, the driven gear 7 and the rack 8, the rack 8 drives the second shaft 1005 and the second plug 1006 to move down, closing the upper orifice, reducing the airflow, reducing the negative pressure, and causing the suction head 11 to obtain a decrease in suction force. Operating according to the technical solution in Embodiment 3, the air intake channel between the negative pressure generator and the suction head 11 is always in a closed state. When the equipment stops running, the doctor gently presses the pedal 3 with his foot. Through the transmission between the driving gear 6, the driven gear 7 and the rack 8, the rack 8 drives the second shaft 1005 and the second plug 1006 to move down, opening the orifice, restoring the air intake channel, forming negative pressure, and the suction head 11 obtains suction.

[0032] Through the above steps, a foot-operated device for controlling the negative pressure is installed between the original abdominal aspirator and the hospital's negative pressure system. During the operation, the doctor can easily control the suction pressure without using their hands. If the suction head 11 causes blockage due to suctioning of abdominal tissue, the negative pressure can be adjusted in time to remove the abdominal tissue and effectively prevent damage to the abdominal tissue. Compared with the original aspirator that could not adjust the negative pressure, this foot-operated pressure regulating device is convenient to use and provides great convenience for laparoscopic surgery, solving the problem that the negative pressure of the abdominal aspirator is inconvenient to control during use, which affects the normal progress of the operation.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An anti-clogging abdominal suction device, comprising a negative pressure generator, a suction head (11), and a flexible tube (12); characterized in that: It also includes a seat plate (1), an end plate (2), a pedal (3), a spring cover (4), a protective cover (5), a drive gear (6), a driven gear (7), a rack (8), a valve head assembly, and a pressure control mechanism; the negative pressure generator is a hospital negative pressure system device. The seat plate (1) is fixedly installed on the operating table frame by anchor bolts. The end of the seat plate (1) facing the operating table is integrally connected to a vertical end plate (2). A pedal (3) is provided on the seat plate (1). One end of the pedal (3) is rotatably connected to the end plate (2) by a pin. A spring cover (4) is installed between the lower end of the pedal (3) and the seat plate (1). A protective cover (5) is installed on one side of the end plate (2) above the pin. A drive gear (6) is fixedly installed on the pin. The drive gear (6) is connected to the protective cover (5). The lower opening extends into the protective cover (5). Inside the protective cover (5), a driven gear (7) is rotatably installed and meshes with the driving gear (6). A rack (8) is slidably connected to the inner wall of the protective cover (5) and meshes with the driven gear (7). A valve head assembly with three channels is installed on the protective cover (5). Two channels are outside the protective cover (5), and the third channel is inside the protective cover (5). The two channels outside the protective cover (5) are connected to the negative pressure generator and the hose (12) respectively. The suction head (11) is connected to the other end of the hose (12). A pressure control mechanism is installed on the rack (8) and extends into the third channel inside the protective cover (5). The rack (8) drives the pressure control mechanism to move longitudinally to open and close the valve head assembly.

2. The anti-blockage abdominal suction device according to claim 1, characterized in that: The inner wall of the protective cover (5) has a longitudinal groove (13). The rack (8) is fixedly connected to the back plate (14) on the side facing the inner wall of the protective cover (5). The back plate (14) is fixedly installed with a slider (15) that is slidably connected in the groove (13). Both ends of the slider (15) are provided with arc-shaped protruding silicone pads.

3. The anti-blockage abdominal suction device according to claim 1, characterized in that: The valve head assembly includes a first chamber (901) and a first diverter (902); the upper end of the protective cover (5) is provided with an installation port, and the first chamber (901) is inserted into the installation port. The upper and lower ends of the first chamber (901) are connected to form two channel openings. The first diverter (902) with a Y-shaped structure is fixedly connected to the side wall of the first chamber (901) outside the protective cover (5). The first diverter (902) and the first chamber (901) are provided with two longitudinally adjacent upper and lower orifices. The channel opening at the upper end of the first chamber (901) is connected to the hose (12), and the first diverter (902) is connected to the negative pressure generator.

4. The anti-blockage abdominal suction device according to claim 3, characterized in that: The pressure control mechanism includes a top plate (1001), a shaft column (1002), and a plug (1003). The top plate (1001) is bolted to the upper end of the rack (8). The upper end of the top plate (1001) is fixedly connected to the shaft column (1002) which extends into the lower end of the tube (901). The upper end of the shaft column (1002) is fixedly installed with the plug (1003) which is close to the inner wall of the tube (901). The plug (1003) abuts against the lower orifice and closes the lower orifice.

5. The anti-blockage abdominal suction device according to claim 1, characterized in that: The valve head assembly includes a second pipe cavity (903) and a second diverter (904); the lower end of the protective cover (5) is provided with an installation port, and the second pipe cavity (903) is inserted into the installation port. The upper and lower ends of the second pipe cavity (903) are connected to form two channel openings. The second diverter (904) with a Y-shaped structure is fixedly connected to the side wall of the second pipe cavity (903) outside the protective cover (5). The second diverter (904) and the second pipe cavity (903) are provided with two longitudinally adjacent upper and lower orifices. The channel opening at the lower end of the second pipe cavity (903) is connected to the hose (12), and the second diverter (904) is connected to the negative pressure generator.

6. The anti-blockage abdominal suction device according to claim 5, characterized in that: The pressure control mechanism includes a second top plate (1004), a second shaft column (1005), and a second plug (1006). The second top plate (1004) is bolted to the lower end of the rack (8). The second shaft column (1005) is fixedly connected to the lower end of the second top plate (1004) and extends into the channel opening at the upper end of the second tube cavity (903). The second plug (1006) is fixedly installed at the lower end of the second shaft column (1005) and is close to the inner wall of the second tube cavity (903). The second plug (1006) is located above the upper opening.

7. The anti-blockage abdominal suction device according to claim 1, characterized in that: The valve head assembly includes a third chamber (905), a third direct head (906), a limiting plate (907), and a spring washer (908). The upper end of the protective cover (5) is provided with an installation port, and the third chamber (905) is inserted into the installation port. The upper and lower ends of the third chamber (905) are connected to form two channel openings. The third direct head (906) is fixedly connected to the side wall of the third chamber (905) outside the protective cover (5). An opening is provided at the junction of the third direct head (906) and the third chamber (905). The channel opening at the upper end of the third chamber (905) is connected to the hose (12). The third direct head (906) is connected to the negative pressure generator. The limiting plate (907) located below the opening is fixedly connected to the inner side of the third chamber (905). A spring washer (908) is provided on the limiting plate (907).

8. The anti-blockage abdominal suction device according to claim 7, characterized in that: The pressure control mechanism includes a No. 3 top plate (1007), a No. 3 shaft (1008), and a No. 3 plug (1009). The No. 3 top plate (1007) is bolted to the upper end of the rack (8). The No. 3 shaft (1008) is fixedly connected to the upper end of the No. 3 top plate (1007) and extends into the channel opening at the lower end of the No. 3 tube cavity (905). The No. 3 shaft (1008) extends upward and passes through the upper part of the limiting plate (907). The No. 3 plug (1009) is fixedly installed on the upper end of the No. 3 shaft (1008) and is close to the inner wall of the No. 3 tube cavity (905). The No. 3 plug (1009) is located above the spring washer (908) and abuts against the orifice and closes the orifice. The height of the spring washer (908) is equal to the length of the No. 3 plug (1009).

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