Automatic air leakage puncture outfit

Abstract

The utility model provides an automatic air leakage puncture outfit, and relates to the technical field of medical instruments. The automatic deflation puncture outfit comprises a puncture outfit body and a deflation assembly, a first cavity is formed in the puncture outfit body, a deflation hole and a deflation channel which can be communicated with each other are formed in the puncture outfit body, the deflation hole is communicated with the first cavity, the deflation channel is communicated with the external environment, and the deflation assembly is arranged in the deflation channel. The air leakage assembly blocks the air leakage hole under the condition that the air pressure in the first cavity is smaller than or equal to the preset air pressure, the air leakage assembly relieves blocking of the air leakage hole under the condition that the air pressure in the first cavity is larger than the preset air pressure, and automatic air leakage can be achieved when the air pressure exceeds the set value, so that the fluctuation of pneumoperitoneum is small.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an automatic deflation puncture device. BACKGROUND

[0002] The puncture device is an essential device for minimally invasive surgery, which provides a surgical channel for other minimally invasive surgical devices. During minimally invasive surgery, a pneumoperitoneum is established in the patient's body by a pneumoperitoneum machine to form a surgical space, and then the puncture device is punctured into the patient's body so that the front end of the puncture device reaches the vicinity of the lesion tissue while the rear end of the puncture device remains outside the patient's body.

[0003] During the periodic inflation process using the pneumoperitoneum machine, the time of each inflation is fixed, and the gas pressure is detected after each inflation. If the gas pressure is detected to exceed the set value after each inflation, the pneumoperitoneum machine will automatically deflate, which will cause large fluctuations in the pneumoperitoneum, which is not conducive to the health of the patient. CONTENT OF THE INVENTION

[0004] The present application aims to, for example, provide an automatic deflation puncture device which can automatically deflate when the gas pressure exceeds the set value to maintain the pneumoperitoneum in a relatively stable state.

[0005] Embodiments of the present application can be implemented as follows:

[0006] The embodiments of the present application provide an automatic deflation puncture device, which comprises a puncture device body and a deflation assembly. The inside of the puncture device body is provided with a first cavity. A deflation hole and a deflation channel capable of communicating are provided on the puncture device body. The deflation hole communicates with the first cavity, and the deflation channel communicates with the external environment. The deflation assembly is arranged in the deflation channel. The deflation assembly blocks the deflation hole when the gas pressure in the first cavity is less than or equal to a preset gas pressure, and the deflation assembly unblocks the deflation hole when the gas pressure in the first cavity is greater than the preset gas pressure.

[0007] Optionally, a fixing cover is provided on the puncture device body, and a first through hole communicating with the deflation channel is formed in the fixing cover. The deflation assembly comprises a spring and a gas blocking core. One end of the spring abuts against the fixing cover, and the other end of the spring is connected with the gas blocking core.

[0008] The gas blocking core blocks the deflation hole when the gas pressure in the first cavity is less than or equal to the preset gas pressure, and the gas blocking core unblocks the deflation hole when the gas pressure in the first cavity is greater than the preset gas pressure.

[0009] Optionally, the surface of the air resistance core away from the fixing cover is a first conical surface, the diameter of the air release channel, the diameter of the air resistance core and the diameter of the air release hole are sequentially reduced, the second conical surface is arranged at the connection position of the air release hole and the air release channel, when the first conical surface abuts against the second conical surface, the air resistance core blocks the air release hole; when the first conical surface is separated from the second conical surface, the air resistance core unblocks the air release hole.

[0010] Optionally, the puncture device further comprises a gas injection valve, the puncture device body is provided with a gas injection hole and a gas injection channel capable of being communicated, the gas injection hole is used for connecting a pneumoperitoneum machine, the gas injection channel is communicated with the first cavity, the gas injection valve is arranged on the puncture device body, and the gas injection valve can communicate or unblock the gas injection hole and the gas injection channel.

[0011] Optionally, a second through hole is arranged on the gas injection valve, the gas injection valve is rotatably arranged on the puncture device body, and in the rotating process of the gas injection valve, the gas injection valve can communicate the gas injection hole and the gas injection channel through the second through hole.

[0012] Optionally, the puncture device body comprises a sleeve, an air resistance valve and a pressing ring, a positioning column is arranged in the sleeve, a first positioning hole is arranged on the air resistance valve, a second positioning hole is arranged on the pressing ring, the positioning column penetrates through the first positioning hole and the second positioning hole at the same time, the pressing ring tightly presses the air resistance valve on the sleeve, and the bottom of the air resistance valve is provided with a cross-shaped opening.

[0013] Optionally, the puncture device body further comprises a first shell, a second shell and a sealing film structure, the first shell and the second shell are connected to form a second cavity between the first shell and the second shell, the sealing film structure comprises a sealing film and a fixing part connected with each other, the sealing film is located in the second cavity, and the fixing part is fixed between the first shell and the second shell.

[0014] Optionally, the puncture device body further comprises a first fixing part, a second fixing part and a support sheet, the first fixing part, the second fixing part and the support sheet are located in the second cavity, the support sheet is located above the sealing film and used for shielding the sealing film, and the first fixing part and the second fixing part are matched to tightly press the support sheet and the fixing part.

[0015] Optionally, the first fixing part is provided with a fixing column, the second fixing part is provided with a fixing hole, the fixing column sequentially penetrates through the support sheet and the fixing part and is in interference fit with the fixing hole.

[0016] Optionally, the second shell is provided with a clamping portion, and the sleeve is provided with a clamping gap, and during rotation of the second shell relative to the sleeve, the clamping portion can be clamped into or out of the clamping gap.

[0017] The automatic deflation puncture device provided by the embodiments of the present application has the following advantages: in order to enable the puncture device to automatically deflate when the air pressure exceeds a preset value, thereby reducing the fluctuation of the pneumoperitoneum, an automatic deflation puncture device is designed, which comprises a puncture device body and a deflation assembly. The puncture device body is internally provided with a first cavity. The puncture device body is provided with a deflation hole and a deflation channel capable of being communicated. The deflation hole is in communication with the first cavity. The deflation channel is in communication with the external environment. The deflation assembly is arranged in the deflation channel. The deflation assembly blocks the deflation hole when the air pressure in the first cavity is less than or equal to a preset air pressure. The deflation assembly unblocks the deflation hole when the air pressure in the first cavity is greater than the preset air pressure. When the air pressure in the first cavity is less than or equal to the preset air pressure, the deflation assembly blocks the deflation hole, and at this time, the deflation hole and the deflation channel are not communicated. When the air pressure in the first cavity is greater than the preset air pressure, the deflation assembly unblocks the deflation hole, and at this time, the deflation hole and the deflation channel are communicated, until the air pressure in the first cavity is less than or equal to the preset air pressure again, thereby realizing that the puncture device can automatically deflate once the air pressure exceeds the preset value without waiting for the air inflation of the pneumoperitoneum machine to end, and the fluctuation of the pneumoperitoneum is small. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 FIG. 1 is a structural schematic diagram of a puncture device in the embodiments of the present application;

[0020] Figure 2 FIG. 2 is an exploded view of the puncture device in the embodiments of the present application;

[0021] Figure 3 FIG. 3 is a first partial cross-sectional view of the puncture device in the embodiments of the present application;

[0022] Figure 4 FIG. 4 is an enlarged view of part A in FIG. 3; Figure 3

[0023] Figure 5 FIG. 5 is a second partial cross-sectional view of the puncture device in the embodiments of the present application;

[0024] Figure 6 ​This is a partial explosion diagram of the puncture device in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the structure of the second housing in an embodiment of this application.

[0026] Icons: 10-Puncture device; 100-Puncture device body; 110-First cavity; 120-Vent hole; 130-Vent channel; 140-Fixing cap; 141-First through hole; 150-Second conical surface; 160-Injection hole; 170-Injection channel; 200-Vent assembly; 210-Spring; 220-Vent-blocking core; 221-First conical surface; 300-Injection valve; 310-Second through hole; 400-Cannula; 410-Positioning pin; 420-Clamping notch; 500 - Airlock valve; 510- First positioning hole; 600- Pressure ring; 610- Second positioning hole; 700- First housing; 710- Second cavity; 720- First annular positioning part; 730- First fixing member; 731- Fixing post; 740- Second fixing member; 741- Fixing hole; 750- Support piece; 751- Extension; 800- Second housing; 810- Second annular positioning part; 820- Holding part; 900- Sealing membrane structure; 910- Sealing membrane; 920- Fixing part. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0033] The present application has found that in the process of periodic inflation by a pneumoperitoneum machine, the time of each inflation is fixed, the gas pressure is detected after each inflation, and the pneumoperitoneum machine will automatically deflate only if the detected gas pressure exceeds a set value after each inflation, which will cause large fluctuations in pneumoperitoneum, which is not conducive to the health of the patient. The embodiments of the present application provide an automatic deflation puncture device which can at least solve the above technical problems.

[0034] Please refer to Figures 1-4 The automatic deflation puncture device 10 provided by the embodiments of the present application comprises a puncture device body 100 and a deflation assembly 200, the inside of the puncture device body 100 is provided with a first cavity 110, the puncture device body 100 is provided with a deflation hole 120 and a deflation channel 130 which can communicate, the deflation hole 120 communicates with the first cavity 110, the deflation channel 130 communicates with the external environment, the deflation assembly 200 is arranged in the deflation channel 130, the deflation assembly 200 blocks the deflation hole 120 when the gas pressure in the first cavity 110 is less than or equal to a preset gas pressure, and the deflation assembly 200 unblocks the deflation hole 120 when the gas pressure in the first cavity 110 is greater than the preset gas pressure.

[0035] It should be noted that the internal gas pressure of pneumoperitoneum is usually controlled at 12-15mmHg (1.6-2kPa), and the preset gas pressure in the present embodiment is 2kPa.

[0036] When the air pressure in the first cavity 110 is less than or equal to 2 kPa, the deflation assembly 200 blocks the deflation hole 120, and the deflation hole 120 and the deflation channel 130 are not in communication. When the air pressure in the first cavity 110 is greater than 2 kPa, the deflation assembly 200 unblocks the deflation hole 120, and the deflation hole 120 and the deflation channel 130 are in communication until the air pressure in the first cavity 110 is less than or equal to 2 kPa again, so that the puncture device 10 automatically deflates when the air pressure exceeds the setting, and the fluctuation of the pneumoperitoneum is small.

[0037] It should be noted that the deflation assembly 200 of the present application can automatically deflate during the inflation of the pneumoperitoneum machine, without waiting for the inflation of the pneumoperitoneum machine to end before deflating, so that the fluctuation of the pneumoperitoneum is small, and the pneumoperitoneum is maintained in a relatively stable state. If the air pressure in the first cavity 110 is still greater than 2 kPa after the inflation of the pneumoperitoneum machine ends, the pneumoperitoneum machine and the deflation assembly 200 will deflate at the same time.

[0038] In the present embodiment, the puncture device body 100 is provided with a fixed cover 140, and the fixed cover 140 is provided with a first through hole 141 in communication with the deflation channel 130. The deflation assembly 200 includes a spring 210 and a gas blocking core 220. One end of the spring 210 abuts against the fixed cover 140, and the other end of the spring 210 is connected to the gas blocking core 220. The gas blocking core 220 blocks the deflation hole 120 when the air pressure in the first cavity 110 is less than or equal to a preset air pressure, and unblocks the deflation hole 120 when the air pressure in the first cavity 110 is greater than the preset air pressure.

[0039] The fixed cover 140 can be fixed to the puncture device body 100 by UV glue, as long as the first through hole 141 provided on the fixed cover 140 is in communication with the deflation channel 130.

[0040] When the air pressure in the first cavity 110 is less than or equal to the preset air pressure, the spring 210 is in a compressed state, so that the gas blocking core 220 always blocks the deflation hole 120. When the air pressure in the first cavity 110 is greater than the preset air pressure, the spring 210 continues to be compressed under force, so that the gas blocking core 220 no longer blocks the deflation hole 120, and the deflation hole 120 and the deflation channel 130 are in communication at this time. The gas in the first cavity 110 can be discharged in turn from the deflation hole 120, the deflation channel 130, and the first through hole 141, so that the air pressure in the first cavity 110 is reduced, until the air pressure in the first cavity 110 is less than or equal to the preset air pressure again, and the gas blocking core 220 blocks the deflation hole 120 again under the elastic action of the spring 210.

[0041] In the embodiment, the surface of the air blocking core 220 away from the fixing cover 140 is a first conical surface 221, the diameter of the air vent channel 130, the diameter of the air blocking core 220 and the diameter of the air vent hole 120 are sequentially reduced, and the second conical surface 150 is arranged at the communication position of the air vent hole 120 and the air vent channel 130. When the first conical surface 221 abuts against the second conical surface 150, the air blocking core 220 blocks the air vent hole 120. When the first conical surface 221 is separated from the second conical surface 150, the air blocking core 220 unblocks the air vent hole 120.

[0042] The air blocking core 220 is generally in a cylindrical shape, and the surface of the air blocking core 220 away from the fixing cover 140 is a first conical surface 221. The air vent hole 120 and the air vent channel 130 are both inner cavities in a cylindrical surface, and the second conical surface 150 is arranged at the communication position of the air vent hole 120 and the air vent channel 130.

[0043] When the air pressure in the first cavity 110 is less than or equal to the preset air pressure, the spring 210 is in a compressed state, the first conical surface 221 abuts against the second conical surface 150, and the air blocking core 220 blocks the air vent hole 120. When the air pressure in the first cavity 110 is greater than the preset air pressure, the spring 210 continues to be compressed under force, the first conical surface 221 is separated from the second conical surface 150, and thus the air blocking core 220 no longer blocks the air vent hole 120.

[0044] In the embodiment, the puncture device 10 further comprises a gas injection valve 300, and the puncture device body 100 is provided with a gas injection hole 160 and a gas injection channel 170 capable of being communicated. The gas injection hole 160 is used for connecting a pneumostasis machine, the gas injection channel 170 is connected with the first cavity 110, the gas injection valve 300 is arranged on the puncture device body 100, and the gas injection valve 300 can communicate or uncommunicate the gas injection hole 160 and the gas injection channel 170.

[0045] When the gas injection valve 300 is used to communicate the gas injection hole 160 and the gas injection channel 170, gas can be injected through the gas injection hole 160 connected with the pneumostasis machine, and at this time, the inflation channel for establishing pneumostasis is formed among the gas injection hole 160, the gas injection channel 170 and the first cavity 110. When the gas injection valve 300 is used to uncommunicate the gas injection hole 160 and the gas injection channel 170, the inflation channel formed among the gas injection hole 160, the gas injection channel 170 and the first cavity 110 is disconnected, and at this time, inflation is impossible.

[0046] In the embodiment, a second through hole 310 is arranged on the gas injection valve 300, and the gas injection valve 300 is rotatably arranged on the puncture device body 100. In the process of rotating the gas injection valve 300, the gas injection valve 300 can communicate the gas injection hole 160 and the gas injection channel 170 through the second through hole 310.

[0047] The axis directions of the second through hole 310, the gas injection hole 160 and the gas injection channel 170 are all along the same plane, and the puncture device body 100 is provided with a mounting hole, the axis direction of the mounting hole is perpendicular to the axis directions of the second through hole 310, the gas injection hole 160 and the gas injection channel 170, and the gas injection valve 300 is arranged in the mounting hole and can rotate around the axis of the mounting hole.

[0048] When the gas injection valve 300 rotates around the axis of the mounting hole to coincide with the axis directions of the second through hole 310, the gas injection hole 160 and the gas injection channel 170, the gas injection hole 160, the second through hole 310 and the gas injection channel 170 are sequentially communicated, and when the gas injection valve 300 rotates around the axis of the mounting hole by a certain angle, for example, 90°, the axis direction of the second through hole 310 is perpendicular to the axis directions of the gas injection hole 160 and the gas injection channel 170, at which time the gas injection hole 160 and the gas injection channel 170 are no longer communicated.

[0049] Please refer to Figures 5-7 In the embodiment, the puncture device body 100 includes a sleeve 400, a gas blocking valve 500 and a compression ring 600, the sleeve 400 is provided with a positioning column 410, the gas blocking valve 500 is provided with a first positioning hole 510, the compression ring 600 is provided with a second positioning hole 610, the positioning column 410 penetrates the first positioning hole 510 and the second positioning hole 610 at the same time, the compression ring 600 tightly presses the gas blocking valve 500 to the sleeve 400, and the bottom of the gas blocking valve 500 is provided with a cross-shaped opening.

[0050] The numbers of the positioning column 410, the first positioning hole 510 and the second positioning hole 610 are all multiple and one-to-one corresponding.

[0051] In the process of installing the gas blocking valve 500, the gas blocking valve 500 is first installed to the positioning column 410 through the first positioning hole 510, and then the compression ring 600 is installed to the positioning column 410 through the second positioning hole 610, and the compression ring 600 tightly presses the gas blocking valve 500 to the sleeve 400 to fix the gas blocking valve 500.

[0052] The cross-shaped opening at the bottom of the gas blocking valve 500 can be opened when the instrument passes, and the cross-shaped opening will be closed under the action of the gas pressure of the first cavity 110 when there is no instrument passing, thereby forming a seal and preventing the gas in the first cavity 110 from leaking out.

[0053] In the embodiment, the puncture device body 100 further includes a first shell 700, a second shell 800 and a sealing film structure 900, the first shell 700 and the second shell 800 are connected to form a second cavity 710 between the first shell 700 and the second shell 800, the sealing film structure 900 includes a sealing film 910 and a fixing part 920 connected with each other, the sealing film 910 is located in the second cavity 710, and the fixing part 920 is fixed between the first shell 700 and the second shell 800.

[0054] The first shell 700 and the second shell 800 can be connected in the form of ultrasonic welding, the first shell 700 is provided with a first annular positioning portion 720, the second shell 800 is provided with a second annular positioning portion 810, and the fixed portion 920 of the sealing film structure 900 is pressed between the first annular positioning portion 720 and the second annular positioning portion 810, so as to ensure the sealing property between the first shell 700 and the second shell 800; the sealing film 910 is approximately conical, and when the instrument enters the puncture device 10, the central hole of the sealing film 910 can wrap the instrument to form a seal.

[0055] In the embodiment, the puncture device main body 100 further comprises a first fixing member 730, a second fixing member 740 and a support sheet 750, the first fixing member 730, the second fixing member 740 and the support sheet 750 are all located in the second cavity 710, the support sheet 750 is located above the sealing film 910 and is used for shielding the sealing film 910, and the first fixing member 730 and the second fixing member 740 cooperate to press the support sheet 750 and the fixed portion 920.

[0056] The support sheet 750 is provided with an extension 751, the support sheet 750 is approximately conical, and the first fixing member 730 and the second fixing member 740 cooperate to press the extension 751 of the support sheet 750 to the fixed portion 920 of the sealing film structure 900.

[0057] When the instrument enters the puncture device 10, the support sheet 750 can shield the sealing film 910 to prevent the instrument from directly contacting the sealing film 910, thereby avoiding the damage of the sealing film 910 to a certain extent.

[0058] In the embodiment, the first fixing member 730 is provided with a fixed column 731, the second fixing member 740 is provided with a fixed hole 741, the fixed column 731 sequentially passes through the support sheet 750 and the fixed portion 920 and is in interference fit with the fixed hole 741.

[0059] The number of the fixed column 731 and the fixed hole 741 is multiple, and the multiple fixed columns 731 and the multiple fixed holes 741 are one-to-one corresponding.

[0060] The extension 751 of the support sheet 750 and the fixed portion 920 of the sealing film structure 900 are both provided with through holes, the fixed column 731 sequentially passes through the through holes on the extension 751 and the fixed portion 920 and is in interference fit with the fixed hole 741, thereby pressing the extension 751 and the fixed portion 920 together.

[0061] In the embodiment, the second shell 800 is provided with a clamping portion 820, the sleeve pipe 400 is provided with a clamping notch 420, and in the process of rotating the second shell 800 relative to the sleeve pipe 400, the clamping portion 820 can be clamped into or out of the clamping notch 420.

[0062] The second shell 800 can rotate relative to the sleeve 400, and the clamping portion 820 is arranged on the inner side wall of the second shell 800 and extends along the circumference of the second shell 800; the clamping notch 420 is arranged on the outer side wall of the sleeve 400 and extends along the circumference of the sleeve 400.

[0063] During the assembly of the puncture device 10, the second shell 800 can rotate relative to the sleeve 400, so that the clamping portion 820 is clamped into the clamping notch 420, at this time, the second shell 800 is relatively fixed with the sleeve 400; when it is needed to separate the second shell 800 from the sleeve 400, the second shell 800 is reversely rotated, so that the clamping portion 820 is released from the clamping notch 420.

[0064] When the second shell 800 is relatively fixed with the sleeve 400, the second shell 800 abuts against the air resistance valve 500, at this time, the air resistance valve 500 gives the second shell 800 an upward force, so that the clamping portion 820 is tightly abutted in the clamping notch 420, the stability of the connection between the second shell 800 and the sleeve 400 is improved, and the mutual abutment between the second shell 800 and the air resistance valve 500 also forms a seal between the second shell 800 and the air resistance valve 500.

[0065] In summary, the embodiment of the present application provides a puncture device 10 which automatically deflates, when the air pressure in the first cavity 110 is less than or equal to the preset air pressure, the air leakage assembly 200 blocks the air leakage hole 120, at this time, the air leakage hole 120 and the air leakage passage 130 are not communicated, and when the air pressure in the first cavity 110 is greater than the preset air pressure, the air leakage assembly 200 unblocks the air leakage hole 120, at this time, the air leakage hole 120 and the air leakage passage 130 are communicated, until the air pressure in the first cavity 110 is less than or equal to the preset air pressure again, so that the puncture device 10 can automatically deflate as soon as the air pressure exceeds the setting without waiting for the inflation of the pneumoperitoneum machine to end, the fluctuation of the pneumoperitoneum is small, the stability of the operation space is ensured, the operation is easier to perform, the operation time is saved, and the health of the patient is better protected.

[0066] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any change or replacement easily thought of by those skilled in the art within the technical range disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An automatically deflated puncture device, characterized in that, The device includes a puncture device body and a venting assembly. The puncture device body has a first cavity inside and a venting hole and a venting channel that are connected to each other. The venting hole is connected to the first cavity, and the venting channel is connected to the external environment. The venting assembly is disposed in the venting channel. The venting assembly blocks the venting hole when the air pressure in the first cavity is less than or equal to a preset air pressure, and releases the blockage of the venting hole when the air pressure in the first cavity is greater than the preset air pressure.

2. The automatically deflated puncture device according to claim 1, characterized in that, The puncture device body is provided with a fixed cover, and the fixed cover has a first through hole communicating with the venting channel; the venting assembly includes a spring and a gas-blocking core, one end of the spring abuts against the fixed cover, and the other end of the spring is connected to the gas-blocking core; The air-blocking core seals the vent hole when the air pressure in the first cavity is less than or equal to the preset air pressure, and releases the seal on the vent hole when the air pressure in the first cavity is greater than the preset air pressure.

3. The automatically deflated puncture device according to claim 2, characterized in that, The surface of the air-blocking core facing away from the fixed cover is a first conical surface. The diameter of the venting channel, the diameter of the air-blocking core, and the diameter of the venting hole decrease in sequence. A second conical surface is provided at the connection between the venting hole and the venting channel. When the first conical surface abuts against the second conical surface, the air-blocking core blocks the venting hole. When the first conical surface and the second conical surface are released from contact, the air-blocking core releases the blockage of the venting hole.

4. The automatically deflated puncture device according to claim 1, characterized in that, The puncture device also includes an air injection valve. The main body of the puncture device is provided with an air injection port and an air injection channel that can communicate with each other. The air injection port is used to connect to the pneumoperitoneum machine. The air injection channel is connected to the first cavity. The air injection valve is provided on the main body of the puncture device. The air injection valve can connect the air injection port and the air injection channel or disconnect the air injection port and the air injection channel.

5. The automatically deflated puncture device according to claim 4, characterized in that, The air injection valve has a second through hole and is rotatably mounted on the puncture device body. During the rotation of the air injection valve, the air injection valve can connect the air injection hole and the air injection channel through the second through hole.

6. The automatically deflated puncture device according to any one of claims 1-5, characterized in that, The puncture device body includes a cannula, an air-blocking valve, and a pressure ring. A positioning post is provided inside the cannula. The air-blocking valve has a first positioning hole, and the pressure ring has a second positioning hole. The positioning post passes through both the first positioning hole and the second positioning hole. The pressure ring presses the air-blocking valve tightly against the cannula. The bottom of the air-blocking valve has a cross-shaped opening.

7. The automatically deflated puncture device according to claim 6, characterized in that, The puncture device body also includes a first housing, a second housing, and a sealing membrane structure. The first housing and the second housing are connected to form a second cavity between the first housing and the second housing. The sealing membrane structure includes a sealing membrane and a fixing part connected to each other. The sealing membrane is located in the second cavity, and the fixing part is fixed between the first housing and the second housing.

8. The automatically deflated puncture device according to claim 7, characterized in that, The puncture device body also includes a first fixing member, a second fixing member, and a support plate. The first fixing member, the second fixing member, and the support plate are all located in the second cavity. The support plate is located above the sealing membrane and is used to cover the sealing membrane. The first fixing member and the second fixing member cooperate to press the support plate and the fixing part together.

9. The automatically deflated puncture device according to claim 8, characterized in that, The first fixing member is provided with a fixing post, and the second fixing member is provided with a fixing hole. The fixing post passes through the support plate and the fixing part in sequence and is interference-fitted with the fixing hole.

10. The automatically deflated puncture device according to claim 7, characterized in that, The second housing is provided with a retaining part, and the sleeve is provided with a retaining notch. During the rotation of the second housing relative to the sleeve, the retaining part can be engaged into the retaining notch or disengaged from the retaining notch.

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