Airtight piece for preventing air leakage of puncture outfit and puncture outfit

Abstract

The invention relates to an airtight piece for preventing air leakage of a puncture outfit and the puncture outfit, the airtight piece comprises a fixing part, a peripheral side part and an opening and closing part which are connected in sequence, the opening and closing part comprises three triangular cones which are connected with one another, and two bottom edges of one triangular cone abut against the bottom edges of different triangular cones respectively to enable the opening and closing part to form three kerfs. According to the airtight piece, the sealing performance and the recovery performance can be enhanced and guaranteed, it can be guaranteed that the airtight piece has certain stability when closed, the air leakage phenomenon caused by dislocation is not likely to happen, and the air blocking performance of the puncture outfit is guaranteed; meanwhile, the resistance of the surgical instrument in the puncture outfit entering and exiting process is reduced, and it is guaranteed that the surgical instrument is used more smoothly. The puncture outfit comprises a puncture rod, a puncture sleeve and an airtight piece used for preventing air leakage of the puncture outfit. The puncture outfit can improve the sealing reliability and the structural stability of the puncture outfit.

Description

Technical Field

[0001] The present invention relates to the field of puncture technology, and in particular to an airtight component for preventing air leakage of a puncture device and a puncture device. Background Art

[0002] As a minimally invasive surgical instrument, the trocar is widely used in medical scenarios such as laparoscopic surgery to establish a body cavity channel to facilitate the entry, exit, and operation of instruments. The trocar typically includes a sleeve assembly that serves as an entry channel for other surgical instruments and a puncture rod that runs through the sleeve assembly. To penetrate the skin, the skin epidermis is first incised with a scalpel, and then the puncture rod penetrates the skin and enters the body cavity. By applying pressure to the proximal end of the puncture rod, the tip of the puncture rod is pushed through the skin until it enters the body cavity. The trocar enters the body cavity, the puncture rod is withdrawn, and the sleeve assembly can be used as a minimally invasive instrument channel for performing endoscopic surgical procedures and endoscopic examinations.

[0003] Traditional trocars often use silicone airtight fittings, which elastically open and close to achieve a seal when the puncture rod passes through. However, existing airtight fittings have some shortcomings. For example, the airtight fittings are prone to deformation and displacement when opening and closing, resulting in a loose seal and gas leakage; the airtight fittings are prone to fatigue deformation after multiple punctures, which reduces the service life of the trocar; and the resistance to the passage of the puncture rod is large, making operation inconvenient. Some airtight fittings use a multi-piece structure, but the slits are unevenly distributed, which can easily lead to unbalanced force when the puncture rod passes through, further increasing the risk of seal failure. Therefore, there is an urgent need for an airtight fitting and trocar with a stable structure and reliable sealing. Summary of the Invention

[0004] Based on this, the present application provides an airtight component and a trocar for preventing air leakage of the trocar, which can improve the sealing reliability and structural stability of the trocar.

[0005] An airtight part for preventing air leakage from a puncture device, the airtight part comprises a fixing part, a peripheral side part and an opening and closing part connected in sequence, the opening and closing part comprises three triangular pyramids connected to each other, the two bases of one triangular pyramid respectively abut against the bases of different triangular pyramids to form three slits in the opening and closing part.

[0006] The above-mentioned airtight part for preventing air leakage of the trocar improves the internal sealing membrane structure of the airtight part, sets three triangular pyramids connected to each other, and the two bases of one triangular pyramid are respectively abutted against the bases of different triangular pyramids to form three slits in the opening and closing part, which can enhance the sealing and recovery performance, ensure that the airtight part has a certain stability when closed, is not easy to be misplaced and cause air leakage, and ensure the air blocking performance of the trocar; at the same time, it also reduces the resistance of surgical instruments in the process of entering and exiting the trocar, ensuring that the surgical instruments are used more smoothly.

[0007] In one embodiment, two sides of each triangular pyramid are connected to the bottom end of the peripheral side portion, the top end of the peripheral side portion is connected to the fixing portion, and the side of the triangular pyramid is closer to the fixing portion than the bottom end.

[0008] In one embodiment, the triangular pyramid includes a first triangular piece and a second triangular piece connected to each other, the base edge of the first triangular piece of one triangular pyramid abuts against the base edge of the second triangular piece of an adjacent triangular pyramid, and the base edge of the second triangular piece abuts against the base edge of the first triangular piece of another adjacent triangular pyramid.

[0009] In one embodiment, the same triangular pyramid includes three sides and two bottom sides, the two outer sides of the triangular pyramid are connected to the bottom ends of the peripheral side portions, and the middle side is the connection between the first triangular piece and the second triangular piece.

[0010] In one embodiment, the triangular pyramid extends from a connection point between the first triangular piece and the second triangular piece toward a side away from the fixing portion to form a supporting blade.

[0011] In one embodiment, the supporting blades at the bottom of one of the triangular pyramids and the slits formed between the other two triangular pyramids are located on the same plane.

[0012] In one embodiment, a surface of each of the first triangular piece and the second triangular piece close to the fixing portion is a convex arc surface.

[0013] A puncture device comprises a puncture rod, a puncture sleeve and the aforementioned air-tight part for preventing air leakage of the puncture device, the puncture sleeve comprises a connected sleeve rod portion and a connecting portion, a puncture channel is formed in the puncture sleeve, a mounting opening is formed in the connecting portion, and the mounting opening is opposite to the puncture channel; the air-tight part comprises a fixing part, a peripheral side part and an opening and closing part connected in sequence, the fixing part is fixed on the connecting portion, the peripheral side part abuts against the peripheral wall of the mounting opening, the opening and closing part comprises three triangular pyramids connected to each other, the two bases of one triangular pyramid respectively abut against the bases of different triangular pyramids to form three slits in the opening and closing part, the slits are opposite to the puncture channel, and the puncture rod can abut against the slit to pass through the air-tight part to reach the puncture channel.

[0014] In the aforementioned trocar, when the puncture rod is advanced, the tip of the rod presses against the curved surface of the triangular pyramid, squeezing the curved structure and evenly expanding the slit, allowing the rod to pass through smoothly. After the puncture rod is withdrawn, the triangular pyramid elastically returns to its closed state, resealing the slit and automatically resetting the airtight member. The slit is aligned with the puncture channel, allowing the puncture rod to push open the slit and pass through the airtight member to reach the puncture channel, maintaining the airtightness of the trocar during the puncture process and improving the sealing reliability and structural stability of the trocar.

[0015] In one embodiment, the fixing portion is an annular structure, the circumferential side portion is a cylindrical structure, the circumferential side portion is connected to the bottom end of the fixing portion, the radial dimension of the fixing portion is larger than the radial dimension of the circumferential side portion to form a protrusion, and the fixing portion overlaps the connecting portion in the radial direction relative to the protrusion of the circumferential side portion.

[0016] In one embodiment, a through hole is provided on the protruding portion, the puncture device further includes a fixing member, a clamping hole is provided on the connecting portion, a buckle is provided on the fixing member, the buckle passes through the through hole and is clamped into the clamping hole, and the fixing member presses the airtight member onto the connecting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 This is a schematic structural diagram of a trocar according to an embodiment;

[0019] Figure 2 for Figure 1 sectional view of

[0020] Figure 3 This is a schematic structural diagram of a trocar according to an embodiment;

[0021] Figure 4 A schematic diagram of a partial structure of a trocar according to an embodiment;

[0022] Figure 5 This is a schematic structural diagram of an airtight member according to an embodiment;

[0023] Figure 6 This is a schematic structural diagram of an airtight member according to an embodiment;

[0024] Figure 7 A schematic diagram of a partial structure of a trocar according to an embodiment;

[0025] Figure 8 An exploded view of a trocar according to an embodiment;

[0026] Figure 9This is a schematic structural diagram of an integrated connector according to an embodiment;

[0027] Figure 10 Schematic diagram of the structure of a sealing member according to an embodiment.

[0028] Reference numerals: puncture device 10; puncture rod 20; head 21; metal rod body 22; first end 221; second end 222; blade head 23; blade head end 231; connecting end 232; puncture sleeve 30; sleeve rod portion 31; connecting portion 32; mounting opening 321; clamping hole 322; puncture channel 33; housing 34; main housing 341; mounting groove 3411; cover 342; accommodating space 343; integrated connecting member 35; horizontal portion 351; second through-opening 3511; first step 3512; guide 352; blocking piece 3521; opening 3521a; first silicone member 36; first through-hole 361; first groove 3611; sealing member 362; first puncture hole 3621; airtight member 40; fixing portion 41; peripheral side portion 42; protrusion 421; through hole 4211; opening and closing portion 43; triangular pyramid 431; slit 431a; side edge 431b; bottom edge 431c; first triangular piece 4311; second triangular piece 4312; supporting blade 4313; fixing member 50; buckle 51 DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0030] In the description of this invention, "above," "below," and "within" are understood to be exclusive of the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0031] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection; and internal communication between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in the present invention based on the specific content of the technical solution.

[0033] As a minimally invasive surgical instrument, the trocar is widely used in medical scenarios such as laparoscopic surgery to establish a body cavity channel to facilitate the entry, exit, and operation of instruments. The trocar typically includes a sleeve assembly that serves as an entry channel for other surgical instruments and a puncture rod that runs through the sleeve assembly. To penetrate the skin, the skin epidermis is first incised with a scalpel, and then the puncture rod penetrates the skin and enters the body cavity. By applying pressure to the proximal end of the puncture rod, the tip of the puncture rod is pushed through the skin until it enters the body cavity. The trocar enters the body cavity, the puncture rod is withdrawn, and the sleeve assembly can be used as a minimally invasive instrument channel for performing endoscopic surgical procedures and endoscopic examinations.

[0034] Traditional trocars often use silicone airtight fittings, which elastically open and close to achieve a seal when the puncture rod passes through. However, existing airtight fittings have some shortcomings. For example, when the airtight fitting is opened and closed, it is easy to deform and deflect, resulting in a loose seal and gas leakage; after multiple punctures, the airtight fitting is prone to fatigue deformation, which affects the service life of the trocar; when the puncture rod passes through, the resistance is large, making operation inconvenient. Some airtight fittings use a multi-piece structure, but the slits are unevenly distributed, which can easily lead to unbalanced force when the puncture rod passes through, further increasing the risk of sealing failure. Therefore, there is an urgent need for a trocar airtight fitting with a stable structure, reliable sealing, and strong durability.

[0035] See Figures 1 to 10 To solve the above problems, the first embodiment of the invention of the present application provides an airtight member 40 for preventing air leakage of the puncture device. The airtight member 40 includes a fixing portion 41, a peripheral side portion 42 and an opening and closing portion 43 connected in sequence. The fixing portion 41 is fixed to the connecting portion 32, the peripheral side portion 42 abuts against the peripheral wall of the mounting opening 321, and the opening and closing portion 43 includes three triangular pyramids 431 connected to each other. The two bases 431c of a triangular pyramid 431 respectively abut against the bases 431c of different triangular pyramids 431 to form three slits 431a in the opening and closing portion 43.

[0036] See Figures 4 to 6The airtight member 40 performs a sealing function, maintaining the tightness of the puncture device 10 during the puncture process while ensuring smooth passage of the puncture rod 20 and minimizing damage. The airtight member 40 comprises a fixing portion 41, a circumferential portion 42, and an opening and closing portion 43, which are sequentially connected. The fixing portion 41 secures the airtight member 40 to the connecting portion 32, thereby increasing the compactness of the puncture device 10. In some embodiments, the fixing portion 41 can be annular and can be tightly secured to the connecting portion 32 of the puncture sleeve 30 using a buckle 51 or other structure. The circumferential portion 42 abuts against the peripheral wall of the mounting opening 321, thereby stably securing the airtight member 40 to the puncture sleeve 30. In some embodiments, the circumferential portion 42 can be made of a cylindrical elastic material. The top of the circumferential portion 42 is connected to the fixing portion 41. The side 431b of the triangular pyramid 431 is adjacent to the fixing portion 41 relative to the bottom 431c, and the bottom extends into the interior of the mounting opening 321 to ensure airtightness. By improving the internal sealing membrane structure of the airtight part 40, three triangular pyramids 431 connected to each other are set, and the two bottom edges 431c of a triangular pyramid 431 are respectively abutted against the bottom edges 431c of different triangular pyramids 431 to form three slits 431a in the opening and closing part, the sealing and recovery properties can be enhanced, and the airtight part 40 can be guaranteed to have a certain stability when closed, and it is not easy to be misplaced and cause air leakage, thereby ensuring the air-blocking performance of the puncture device 10; at the same time, it also reduces the resistance of the surgical instrument in the process of entering and exiting the puncture device 10, ensuring that the surgical instrument is used more smoothly.

[0037] The two outer edges 431b of each triangular pyramid 431 are fixed to the bottom edge of the peripheral portion 42, ensuring that stress is evenly transferred to the peripheral portion 42. A smooth transition is achieved at the connection to avoid material fatigue caused by stress concentration. The top of the peripheral portion 42 extends and connects to the annular fixing portion 41, forming a complete sealing path from the fixing portion 41 to the opening and closing portion 43. This structure ensures the stable installation of the airtight member 40 while maintaining the freedom of movement of the opening and closing portion 43.

[0038] Each triangular pyramid 431 includes a first triangular piece 4311 and a second triangular piece 4312 connected at a specific angle to form a stable three-dimensional cone structure. Between adjacent triangular pyramids 431, the base 431c of the first triangular piece 4311 of one triangular pyramid 431 fits tightly against the base 431c of the second triangular piece 4312 of the adjacent triangular pyramid 431. Simultaneously, the base 431c of the second triangular piece 4312 of the same triangular pyramid 431 abuts against the base 431c of the first triangular piece 4311 of another adjacent triangular pyramid 431. The interlocking structure between adjacent triangular pyramids 431 creates a uniformly distributed sealing interface for the airtight member 40, ensuring no leakage. Furthermore, when the puncture rod 20 passes through, the different triangular pyramids 431 can expand outward synchronously and evenly, providing multi-level sealing protection. Even if a single component experiences slight wear, the overall sealing function remains intact. The mutual support between adjacent components enhances the stability of the overall structure. In some embodiments, the first triangular piece 4311 and the second triangular piece 4312 have a convex curved surface on the side facing away from the puncture channel 33. That is, the first triangular piece 4311 and the second triangular piece 4312 have a convex curved surface on the side near the fixing portion 41. The curved surface is located on the side facing away from the puncture channel 33 and corresponds to the contact surface of the puncture rod 20. The curved surface structure can naturally guide the puncture rod 20 into the device, reduce the impact force during initial contact, and achieve a gradual deployment process.

[0039] The same triangular pyramid 431 includes three side edges 431b and two base edges 431c. The three side edges 431b form the main frame of the pyramid, and the two base edges 431c form a sealed contact surface. The two outer side edges 431b of the triangular pyramid 431 are connected to the bottom end of the peripheral side portion 42. The two outer side edges 431b are directly and firmly connected to the bottom end of the peripheral side portion 42. The middle side edge 431b serves as the inner connecting line between the first triangular piece 4311 and the second triangular piece 4312. The side edges 431b of the triangular pyramid 431 are farther away from the puncture channel 33 than the base edge 431c, that is, the side edges 431b of the triangular pyramid 431 are closer to the fixed portion 41 than the base edge 431c. During the puncture process, when the puncture rod 20 contacts, the base edge 431c is first subjected to force, the side edges 431b guide the expansion direction, and the middle connecting edge coordinates the movement of the two triangular pieces.

[0040] See Figure 5 and Figure 6The airtight member 40 includes a support blade 4313 located on the side of the triangular pyramid 431 facing the puncture channel 33. Specifically, the support blade 4313 extends from the junction of the first triangular piece 4311 and the second triangular piece 4312 of the triangular pyramid 431 toward the side away from the fixed portion 41. The support blade 4313 extends from the junction of the first triangular piece 4311 and the second triangular piece 4312 toward the puncture channel 33. Specifically, the support blade 4313 is located on the inner side of each triangular pyramid 431 facing the puncture channel 33. The support blade 4313 is formed by a natural extension from the junction of the first triangular piece 4311 and the second triangular piece 4312 and extends toward the puncture channel 33. The outer end of the support blade 4313 maintains stable contact with the peripheral wall of the mounting opening 321, forming an integrated structure with the main structure of the triangular pyramid 431. The support blade 4313 provides additional mechanical support for the triangular pyramid 431, enhancing the stability of the overall structure and dissipating stress during the puncture operation. At the same time, the support blades 4313 and the slits 431a form a cooperative sealing system that helps maintain the shape integrity of the airtight member 40, ensures the accuracy of the opening and closing of the triangular pyramid 431, and limits excessive deformation of the triangular pyramid 431 during opening and closing. When the airtight member 40 is static, the support blades 4313 maintain slight tension and contact pressure with the surrounding wall of the mounting opening 321. During puncture, the support blades 4313 move in coordination with the triangular pyramid 431, providing reverse support force to ensure the accuracy of the opening and closing of the triangular pyramid 431. Through geometric and mechanical coordination, the support blades 4313 can significantly improve the operability and sealing reliability of the puncture device 10. In some embodiments, the bottom edge 431c of the support blade 4313 is wavy. This wavy structure has better elastic deformation capacity, which reduces the need for excessive force when the puncture rod 20 penetrates, thereby improving the operability of the puncture device 10.

[0041] In order to ensure airtight installation and easy maintenance, in some embodiments, the fixing portion 41 is provided in an annular structure, which can provide uniform force distribution. The radial dimension of the fixing portion 41 is larger than the radial dimension of the circumferential side portion 42. The circumferential side portion 42 is a cylindrical structure and is integrally formed with the fixing portion 41. The diameter of the circumferential side portion 42 is slightly smaller than the fixing portion 41, forming a stepped transition. Specifically, the annular protrusion 421 of the fixing portion 41 is smoothly overlapped on the connecting portion 32 of the puncture sleeve 30 to form a stable support platform, which can ensure that the airtight member 40 is accurately positioned. In some embodiments, a through hole 4211 is provided on the protrusion 421, and the through hole 4211 can be provided in plurality, with the plurality of through holes 4211 being arranged at intervals. The puncture device 10 also includes a fixing part 50, a card hole 322 is provided on the connecting part 32, and a buckle 51 is provided on the fixing part 50. The buckle 51 can be set to multiple, and the number of buckles 51 is consistent with the number of through holes 4211 and card holes 322. The buckle 51 passes through the through hole 4211 and is snapped into the card hole 322. The fixing part 50 presses the airtight part 40 onto the connecting part 32. During installation, first pre-position the airtight part 40, place the airtight part 40 at the predetermined position of the connecting part 32, align the position of the buckle 51 of the fixing part 50 with the through hole 4211, apply appropriate pressure to make the buckle 51 pass through the through hole 4211, and hear a "click" sound, indicating that the buckle 51 has been snapped into the hole 322. Further confirm that the fixing part 50 completely presses the airtight part 40, and check the locking status of each buckle 51. The above process can be installed and disassembled without tools, and the buckle 51 structure can provide clear buckle 51 feedback, which is convenient for installation and improves the convenience of installation and maintenance of the puncture device 10.

[0042] See Figures 1 to 10 The puncture device 10 of the second embodiment of the invention includes a puncture rod 20, a puncture sleeve 30 and an airtight member 40 for preventing air leakage of the puncture device. The puncture sleeve 30 includes a sleeve rod portion 31 and a connecting portion 32 connected to each other. A puncture channel 33 is formed in the puncture sleeve 30, and a mounting port 321 is formed in the connecting portion 32. The mounting port 321 is opposite to the puncture channel 33; the airtight member 40 includes a fixing portion 41, a peripheral portion 42 and an opening and closing portion 43 connected in sequence. The fixing portion 41 fixes On the connecting portion 32, the peripheral side portion 42 abuts against the peripheral wall of the mounting opening 321. The opening and closing portion 43 includes three triangular pyramids 431 connected to each other. The two bases 431c of one triangular pyramid 431 abut against the bases 431c of different triangular pyramids 431, forming three slits 431a on the opening and closing portion 43. The slits 431a are directly opposite the puncture channel 33. The puncture rod 20 can push through the slits 431a to pass through the airtight member 40 and reach the puncture channel 33.

[0043] The puncture device 10 includes a puncture rod 20 and a puncture sleeve 30. The puncture rod 20 is movably connected to the puncture sleeve 30. The puncture rod 20 is generally a hollow cylinder for accommodating surgical instruments or operating components. The puncture sleeve 30 is a sleeve that covers the puncture rod 20, protecting the surgical field and allowing surgical instruments to pass through. Specifically, the puncture sleeve 30 includes a sleeve portion 31 and a connecting portion 32, which are connected to each other. The sleeve portion 31 forms the main housing of the puncture sleeve 30. The interior of the puncture sleeve 30 defines a puncture channel 33, through which the puncture rod 20 or external instruments can pass. The connecting portion 32 defines a mounting opening 321, which is opposite the puncture channel 33 and into which the airtight member 40 can be secured. The puncture rod 20 and the puncture sleeve 30 can be used in minimally invasive surgery, such as laparoscopic surgery, thoracoscopic surgery, neurosurgery, etc. The puncture device 10 can reduce the operation time, relieve the patient's pain, reduce complications and shorten the recovery time.

[0044] In some embodiments, the puncture sleeve 30 further includes a shell 34, an integrated connector 35, and a first silicone member 36. A first through-hole 361 is formed in the middle of the first silicone member 36. A sealing member 362 is provided on the wall of the first through-hole 361. The integrated connector 35 includes an annular horizontal portion 351 and a guide portion 352. A second through-hole 3511 is formed in the center of the horizontal portion 351. The horizontal portion 351 is clamped on the wall of the through-hole. The guide portion 352 includes a plurality of baffles 3521 extending from the horizontal portion 351 toward one side of the sealing member 362. The plurality of baffles 3521 are arranged along the circumference of the second through-hole 3511 and are bendably connected to a side of the horizontal portion 351 near the sealing member 362. Each baffle 3521 is bent toward the axis of the second through-hole 3511 and abuts against the sealing member 362 to guide the puncture rod 20. The puncture rod 20 sequentially passes through the second through-hole 3511 and the sealing member 362 of the integrated connector 35. The puncture sheath 30 provides a stable puncture channel and a strong seal. The integrated connector enhances the integration and sealing reliability of the puncture device. A first silicone member 36 is located within the puncture sheath 30, with a first through-hole 361 defined in its center for the insertion and exit of the puncture rod 20. A seal 362 is embedded in the wall of the first through-hole 361, which tightly fits the puncture rod 20, preventing gas or liquid leakage while reducing frictional resistance.

[0045] In some embodiments, the puncture device 10 can be made of stainless steel or plastic. Stainless steel offers excellent corrosion resistance, resisting erosion by body fluids and disinfectants, ensuring stability and safety during surgery. Stainless steel also exhibits good compatibility with human tissue, reducing the risk of allergic and rejection reactions. The heat-treated stainless steel needle tip has a moderate hardness, ensuring accurate and safe puncture. Plastic puncture devices 10 are lightweight, inexpensive, and highly disposable. Polycarbonate or ABS resin (a thermoplastic polymer) can be used. Polycarbonate is a high-performance thermoplastic with high transparency, strength, impact resistance, and excellent thermal stability. These properties make it an ideal material for transparent cannulas. To maintain the transparency of the puncture sheath 30, high-purity polycarbonate raw materials must be selected, and parameters such as temperature, cooling rate, and pressure must be strictly controlled during production to minimize bubbles and defects. ABS resin is a commonly used thermoplastic with excellent mechanical and processing properties. It is commonly used to manufacture components such as the outer cannula and sealing gasket of the puncture device 10. ABS resin has advantages such as good formability and chemical resistance, making it suitable for use in medical devices subject to certain chemical corrosion environments. In some embodiments, in addition to single-material stainless steel and plastic trocars, dual-material trocars 10 can also be provided. These dual-material trocars 10 combine the advantages of both stainless steel and plastic, offering high strength and toughness while being lightweight and easy to sterilize.

[0046] See Figure 7 and Figure 9 The integrated connector 35 adopts an integrated design to ensure a stable structure and easy assembly. It consists of an annular horizontal portion 351 and a guide portion 352. Specifically, the horizontal portion 351 is annular in structure, and a second through-hole 3511 is opened in the center of the horizontal portion 351. The second through-hole 3511 is used to pass the puncture rod 20. The horizontal portion 351 is tightly engaged with the wall surface of the first through-hole 361 to ensure the stability of the overall structure. A plurality of bendable baffles 3521 extend from the horizontal portion 351 toward the sealing member 362. The plurality of baffles 3521 are evenly arranged along the circumference of the second through-hole 3511 and naturally bend toward the central axis to contact the sealing member 362. In some embodiments, the entire connector is processed in one piece, so that the puncture device 10 has a high degree of integration and is easy to assemble. In some embodiments, the integrated connector 35 is made of plastic material, for example, the integrated connector 35 is made of PE (polyethylene) material. The integrated connector 35 made of PE (polyethylene) material has good anti-corrosion, flame retardant, heat preservation and shockproof properties. At the same time, it has strong pressure resistance, is easy to install, and has the function of reducing vibration and buffering thermal expansion.

[0047] When the puncture rod 20 is inserted, the baffle 3521 adaptively adjusts its angle to guide the puncture rod 20 along the correct path, reducing deflection or friction on the puncture rod 20 and improving puncture accuracy. The puncture rod 20 is made of high-strength material and features a sharp tip for easier tissue penetration. When the user uses the puncture device 10, the puncture rod 20 sequentially passes through the second through-hole 3511 of the integrated connector 35 and the first puncture hole 3621 of the seal 362. Guided by the baffle 3521, it smoothly enters the target position. This prevents the puncture rod 20 from directly piercing the seal 362 of the first silicone member 36, thereby increasing the service life of the seal 362. When the puncture device 10 is in use, the puncture rod 20 moves within the puncture sleeve 30, with the baffle 3521 and seal 362 working together to provide stable guidance and ensure a tight seal during the puncture process. At the same time, the bendable nature of the baffle 3521 enables it to adapt to puncture rods 20 of different diameters, and automatically reset after puncture is completed to maintain a sealed state. The integrated structure of the baffle 3521 and the horizontal portion 351 can improve the integration and sealing reliability of the puncture device 10.

[0048] See Figure 7 and Figure 9 Multiple baffles 3521 are arranged circumferentially along the second through-hole 3511, with appropriate spacing between adjacent baffles 3521. This allows the baffles 3521 to more flexibly adjust their angles during insertion, reducing the contact area with the puncture rod 20 and thereby reducing frictional resistance for a smoother puncture process. Because the baffles 3521 are not completely enclosed, the puncture rod 20 can more naturally conform to the guidance of the baffles 3521 during insertion, avoiding deviation or jamming caused by rigid constraints. Furthermore, the spacing design allows the baffles 3521 to deform independently when subjected to force, improving adaptability to puncture rods 20 of varying diameters. In some embodiments, the spacing between adjacent baffles 3521 is less than or equal to 3 mm. When the puncture rod 20 is fully inserted, the baffles 3521 can still evenly contact the seal 362, ensuring a tight seal on the puncture channel. When the puncture rod 20 is removed, the elastic recovery of the baffle 3521 helps the seal 362 quickly reset, preventing gas or liquid leakage. Furthermore, the spacing of the baffles 3521 reduces material fatigue, prevents deformation or breakage of the overall structure due to long-term use, and extends the service life of the puncture device 10. In some embodiments, six baffles 3521 are provided, all identical, and spaced apart along the circumference of the second through-opening 3511.

[0049] See Figure 9In some embodiments, the baffle 3521 is provided with openings 3521a on opposite sides of the second through-opening 3511, near one end of the horizontal portion 351. Each baffle 3521 has symmetrically extended openings 3521a at its base where it connects to the horizontal portion 351. The two openings 3521a on each baffle 3521 are disconnected. This allows the baffle 3521 to narrow near the second through-opening 3511, while maintaining overall connection strength. The openings 3521a significantly increase the flexibility of the base of the baffle 3521, allowing it to deflect more freely when subjected to force from the puncture rod 20, effectively reducing frictional resistance during the puncture process. After completing its guiding function, the baffle 3521 quickly returns to its initial position. In some embodiments, the opening 3521a extends circumferentially, narrowing the width of the baffle 3521 near one end of the horizontal portion 351. The opening 3521a gradually narrows from the base of the baffle 3521 toward the tip, forming a unique "neck" structure. The extension direction of the opening 3521a aligns with the circumferential arrangement of the baffles 3521. The narrowed base structure creates a natural stress buffer, preventing excessive stress concentration at the connection. When the puncture rod 20 is inserted, the baffle 3521 smoothly expands outward, providing a continuous and stable guiding force. When the puncture rod 20 is removed, the baffle 3521 automatically resets, assisting the seal 362 in restoring its sealed state.

[0050] See Figures 7 to 9 The outer wall of the horizontal portion 351 is provided with a first step 3512, and the wall surface of the first through-hole 361 is provided with a first groove 3611 on the side close to the integrated connector 35. The first step 3512 is snapped into the first groove 3611. The connection between the integrated connector 35 and the first silicone member 36 is achieved by precisely snapping the first step 3512 into the first groove 3611, which can effectively prevent the component from loosening or shifting during use and improve the stability of the structure.

[0051] See Figure 10 A first puncture hole 3621 is provided at the center of the sealing member 362 to allow the puncture rod 20 to pass through the sealing member 362 . The diameter of the first puncture hole 3621 can be adjusted according to actual needs. In some embodiments, the hole wall of the first puncture hole 3621 is a smooth plane to reduce the resistance during the movement of the puncture rod 20 and reduce the operational resistance during the use of the puncture sleeve 30 .

[0052] See Figures 1 to 8The puncture rod 20 includes a head 21, a metal rod body 22 and a blade head 23. The head 21 is the first end 221 of the puncture rod 20 and is usually fixed to the metal rod body 22. The main function of the head 21 is to provide a gripping point for user convenience. In some embodiments, the head 21 can be set to an ergonomic structure to ensure that the user does not feel tired when using it for a long time. In addition, the material of the head 21 is usually consistent with the metal rod body 22 to ensure the stability of the overall structure. The length and diameter of the metal rod body 22 are designed according to the specific application scenario. The metal rod body 22 is usually a hollow structure to reduce the overall weight and improve flexibility. The metal rod body 22 can connect the head 21 and the blade head 23. The material of the metal rod body 22 can be stainless steel to ensure that it has high strength and corrosion resistance.

[0053] See Figure 2 and Figure 8 The blade head 23 is used for puncture. The blade head 23 includes a blade end 231 and a connecting end 232. The connecting end 232 of the blade head 23 is the part that connects the blade head 23 to the metal rod body 22 and has the function of connecting the metal rod body 22 and the blade head 23. The connecting end 232 of the blade head 23 is detachably fixed to the second end 222 of the metal rod body 22 in the longitudinal direction. The detachable connection method facilitates the replacement of the blade head 23 when the puncture rod 20 is used, so as to facilitate replacement or maintenance. The first end 221 and the second end 222 are opposite to each other. The blade end 231 is the working part of the puncture rod 20 and is usually designed to be pointed or sharp to facilitate puncture or cutting. The puncture rod 20 provided in this application is different from the structure of the one-piece injection molded blade rod and heat shrink tube in the prior art. By designing the puncture rod 20 as a split body, the detachable blade head 23 is easy to replace and maintain, the assembly process is simple, easy to operate, and the puncture rod 20 is not easy to bend.

[0054] The housing 34 comprises a main shell 341 and a cover 342, which is positioned over the main shell 341. The housing 34 can be injection molded from a high-strength medical material. The integrated connector 35 and the first silicone member 36 are positioned within the accommodating space 343 formed between the main shell 341 and the cover 342. Specifically, in some embodiments, a mounting groove 3411 is defined at the top of the main shell 341, within which the integrated connector 35 and the first silicone member 36 are positioned. The cover 342 abuts against the horizontal portion 351, pressing the integrated connector 35 and the first silicone member 36 into the mounting groove 3411. When the trocar 10 is installed, the cover 342 is pressed downward, and its inner surface comes into contact with the horizontal portion 351 of the integrated connector 35. This evenly distributed pressure secures the entire assembly within the mounting groove 3411, preventing localized stress concentration and ensuring deformation during long-term use.

[0055] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An airtight member for preventing air leakage of a trocar, characterized in that: The airtight part includes a fixing part, a peripheral side part and an opening and closing part connected in sequence. The opening and closing part includes three triangular pyramids connected to each other. The two bases of one triangular pyramid are respectively abutted against the bases of different triangular pyramids to form three slits in the opening and closing part.

2. The airtight member for preventing air leakage of a trocar according to claim 1, characterized in that: Two side edges of each triangular pyramid are connected to the bottom end of the peripheral side portion, the top end of the peripheral side portion is connected to the fixing portion, and the side edges of the triangular pyramid are closer to the fixing portion than the bottom edge.

3. The airtight member for preventing air leakage of a trocar according to claim 2, characterized in that: The triangular pyramid includes a first triangular piece and a second triangular piece connected to each other. The base edge of the first triangular piece of one triangular pyramid abuts against the base edge of the second triangular piece of an adjacent triangular pyramid, and the base edge of the second triangular piece abuts against the base edge of the first triangular piece of another adjacent triangular pyramid.

4. The airtight member for preventing air leakage of a trocar according to claim 3, characterized in that: The same triangular pyramid includes three sides and two bottom sides. The two outer sides of the triangular pyramid are connected to the bottom ends of the peripheral side portions, and the middle side is the connection between the first triangular piece and the second triangular piece.

5. The airtight member for preventing air leakage of a trocar according to claim 3, characterized in that: The triangular pyramid extends from a connection point corresponding to the first triangular piece and the second triangular piece toward a side away from the fixing portion to form a supporting blade.

6. The airtight member for preventing air leakage of a trocar according to claim 5, characterized in that: The supporting blades at the bottom of one triangular pyramid and the slits formed between the other two triangular pyramids are located on the same plane.

7. The airtight member for preventing air leakage of a trocar according to claim 5, characterized in that: A surface of each of the first triangular piece and the second triangular piece close to the fixing portion is a convex arc surface.

8. A trocar, characterized in that: It comprises a puncture rod, a puncture sleeve and an air-tight part for preventing air leakage of the puncture device according to any one of claims 1 to 7, the puncture sleeve comprises a sleeve rod portion and a connecting portion connected to each other, a puncture channel is formed in the puncture sleeve, a mounting opening is formed in the connecting portion, and the mounting opening is opposite to the puncture channel; the air-tight part comprises a fixing part, a peripheral side part and an opening and closing part connected in sequence, the fixing part is fixed on the connecting portion, the peripheral side part abuts against the peripheral wall of the mounting opening, the opening and closing part comprises three triangular pyramids connected to each other, the two bases of one triangular pyramid respectively abut against the bases of different triangular pyramids to form three slits in the opening and closing part, the slits are opposite to the puncture channel, and the puncture rod can abut against the slit to pass through the air-tight part to reach the puncture channel.

9. The trocar according to claim 8, characterized in that The fixing portion is an annular structure, the circumferential side portion is a cylindrical structure, the circumferential side portion is connected to the bottom end of the fixing portion, the radial dimension of the fixing portion is larger than the radial dimension of the circumferential side portion to form a protrusion, and the fixing portion overlaps the connecting portion in the radial direction relative to the protrusion of the circumferential side portion.

10. The trocar according to claim 9, characterized in that The protruding portion is provided with a through hole, the puncture device further comprises a fixing member, the connecting portion is provided with a clamping hole, the fixing member is provided with a buckle, the buckle passes through the through hole and is clamped into the clamping hole, and the fixing member presses the airtight member onto the connecting portion.

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