Airtight member and puncture outfit

Abstract

The utility model relates to an airtight piece and a puncture outfit, the airtight piece comprises a fixed 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 respectively abut against the bottom edges of different triangular cones so as 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 air sealing piece. The puncture outfit can improve the sealing reliability and the structural stability of the puncture outfit.

Description

Technical Field

[0001] This utility model relates to the field of puncture technology, and in particular to an airtight component and a puncture device. Background Technology

[0002] A trocar, a minimally invasive surgical instrument, is widely used in medical settings such as laparoscopic surgery to create access to body cavities for instrument insertion, removal, and manipulation. A trocar typically comprises a sleeve assembly that serves as a channel for other surgical instruments and a trocar penetrating within the sleeve assembly. To penetrate the skin, the epidermis is first incised with a scalpel, and then the trocar penetrates the skin and enters the body cavity. By applying pressure to the proximal end of the trocar, its tip is pushed through the skin until it enters the body cavity. Once the trocar is inside the body cavity, the trocar is withdrawn, and the sleeve assembly serves as a minimally invasive instrument channel for performing endoscopic surgical procedures and endoscopic examinations.

[0003] Traditional puncture devices often employ silicone airtight components, which achieve a seal during the passage of the puncture rod through their elastic opening and closing. However, existing airtight components have several shortcomings. For example, they are prone to deformation and displacement during opening and closing, leading to incomplete sealing and gas leakage; after repeated punctures, the airtight components are susceptible to fatigue and deformation, affecting the lifespan of the puncture device; and the resistance during the passage of the puncture rod is relatively high, making operation inconvenient. Some airtight components use a multi-piece structure, but the uneven distribution of slits can easily lead to unbalanced forces during the passage of the puncture rod, further increasing the risk of seal failure. Therefore, there is an urgent need for a structurally stable and reliably sealing airtight component and puncture device. Utility Model Content

[0004] Based on this, this application provides an airtight component and a puncture device, which can improve the sealing reliability and structural stability of the puncture device.

[0005] An airtight component includes a fixed part, a peripheral part, and an opening and closing part connected in sequence. The opening and closing part includes three triangular pyramids that are connected to each other. Two base edges of one of the triangular pyramids abut against the base edges of the other triangular pyramids to form three slits in the opening and closing part.

[0006] The above-mentioned airtight components, by improving the internal sealing membrane structure, incorporate three interconnected triangular pyramids. Two base edges of one pyramid abut against the base edges of different pyramids, creating three slits in the opening and closing section. This enhances sealing and resilience, ensuring stability when closed and preventing misalignment and leakage, thus guaranteeing the air-blocking performance of the trocar. Simultaneously, it reduces resistance to surgical instruments during insertion and removal, ensuring smoother instrument use.

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

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

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

[0010] In one embodiment, the triangular pyramid extends away from the fixing part at the connection between the first and second triangular pieces to form a support blade.

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

[0012] In one embodiment, each of the first and second triangular pieces has a convex arc surface on the surface near the fixing part.

[0013] A puncture device includes a puncture rod, a puncture sleeve, and the aforementioned airtight component. The puncture sleeve includes a sleeve rod portion and a connecting portion connected together, forming a puncture channel in the puncture sleeve. An installation port is formed in the connecting portion, and the installation port is opposite to the puncture channel. The airtight component includes a fixing portion, a peripheral portion, and an opening and closing portion connected in sequence. The fixing portion is fixed to the connecting portion, and the peripheral portion abuts against the peripheral wall of the installation port. The opening and closing portion includes three triangular pyramids that are connected to each other. Two base edges of one triangular pyramid abut against the base edges of different triangular pyramids to form three slits in the opening and closing portion. The slits are directly opposite the puncture channel, and the puncture rod can abut against the slits to pass through the airtight component and reach the puncture channel.

[0014] In the above-described puncture device, when the puncture rod is advanced, its tip presses against the arc surface of the triangular pyramid, causing the arc surface structure of the pyramid to be compressed. This causes the slit to expand evenly, allowing the puncture rod to pass smoothly. After the puncture rod is withdrawn, the triangular pyramid elastically returns to its closed state, and the slit re-seals, allowing the airtight component to automatically reset. The slit is aligned with the puncture channel, and the puncture rod can push open the slit to pass through the airtight component and reach the puncture channel, maintaining the airtightness of the puncture device during the puncture process and improving the sealing reliability and structural stability of the puncture device.

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

[0016] In one embodiment, the protrusion has a through hole, the puncture device also includes a fixing member, the connecting part has a locking hole, the fixing member has a buckle, the buckle passes through the through hole and is locked into the locking hole, and the fixing member presses the airtight member to the connecting part. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of the puncture device according to one embodiment;

[0019] Figure 2 for Figure 1 A sectional view;

[0020] Figure 3 This is a schematic diagram of the puncture device according to one embodiment;

[0021] Figure 4 This is a schematic diagram of a partial structure of a puncture device according to one embodiment;

[0022] Figure 5 This is a schematic diagram of the structure of an airtight component according to one embodiment;

[0023] Figure 6 This is a schematic diagram of the structure of an airtight component according to one embodiment;

[0024] Figure 7 This is a schematic diagram of a partial structure of a puncture device according to one embodiment;

[0025] Figure 8 An exploded view of a puncture device according to one embodiment;

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

[0027] Figure 10 This is a schematic diagram of the structure of a sealing element according to one embodiment.

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

[0029] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0030] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] A trocar, a minimally invasive surgical instrument, is widely used in medical settings such as laparoscopic surgery to create access to body cavities for instrument insertion, removal, and manipulation. A trocar typically comprises a sleeve assembly that serves as a channel for other surgical instruments and a trocar penetrating within the sleeve assembly. To penetrate the skin, the epidermis is first incised with a scalpel, and then the trocar penetrates the skin and enters the body cavity. By applying pressure to the proximal end of the trocar, its tip is pushed through the skin until it enters the body cavity. Once the trocar is inside the body cavity, the trocar is withdrawn, and the sleeve assembly serves as a minimally invasive instrument channel for performing endoscopic surgical procedures and endoscopic examinations.

[0034] Traditional puncture devices often use silicone airtight components, which achieve a seal when the puncture rod passes through through the elastic opening and closing of the silicone airtight component. However, existing airtight components have some shortcomings. For example, the airtight component is prone to deformation and displacement during opening and closing, leading to poor sealing and gas leakage; after repeated punctures, the airtight component is prone to fatigue deformation, affecting the service life of the puncture device; and the resistance when the puncture rod passes through is relatively large, making operation inconvenient. Some airtight components use a multi-piece structure, but the uneven distribution of slits can easily lead to unbalanced forces when the puncture rod passes through, further increasing the risk of seal failure. Therefore, there is an urgent need for a puncture device airtight component with a stable structure, reliable sealing, and high durability.

[0035] See Figures 1-10 To solve the above problems, the first aspect of this utility model provides an airtight component 40. The airtight component 40 includes a fixed part 41, a peripheral part 42 and an opening and closing part 43 connected in sequence. The fixed part 41 is fixed to the connecting part 32. The peripheral part 42 abuts against the peripheral wall of the mounting opening 321. The opening and closing part 43 includes three triangular pyramids 431 that are connected to each other. The two base edges 431c of one triangular pyramid 431 abut against the base edges 431c of different triangular pyramids 431 respectively so that the opening and closing part 43 forms three slits 431a.

[0036] See Figures 4-6The airtight component 40 serves a sealing function, maintaining the airtightness of the puncture device 10 during puncture, while ensuring the smooth passage of the puncture rod 20 and minimizing damage. The airtight component 40 includes a fixing part 41, a peripheral part 42, and an opening / closing part 43 connected in sequence. The fixing part 41 secures the airtight component 40 to the connecting part 32, increasing the compactness of the puncture device 10 structure. In some embodiments, the fixing part 41 may have a ring-shaped structure, and can be tightly fixed to the connecting part 32 of the puncture sheath 30 by means of a snap-fit ​​51 or similar structure. The peripheral part 42 abuts against the peripheral wall of the mounting port 321 to stably fix the airtight component 40 and the puncture sheath 30. In some embodiments, the peripheral part 42 may be made of a cylindrical elastic material. The top of the peripheral part 42 is connected to the fixing part 41, and the side 431b of the triangular pyramid 431 is closer to the fixing part 41 than the bottom edge 431c, with the bottom end extending into the interior of the mounting port 321 to ensure airtightness. By improving the internal sealing membrane structure of the airtight component 40, three interconnected triangular pyramids 431 are set up, and the two base edges 431c of one triangular pyramid 431 abut against the base edges 431c of different triangular pyramids 431 respectively, so that the opening and closing part forms three slits 431a. This can enhance the sealing and recovery performance, ensuring that the airtight component 40 has a certain stability when closed, and is not easy to misalign and cause air leakage, thus ensuring the air resistance performance of the trocar 10. At the same time, it also reduces the resistance of surgical instruments in the process of entering and exiting the trocar 10, ensuring smoother use of surgical instruments.

[0037] The two outer edges 431b of each triangular pyramid 431 are fixed to the bottom edge of the peripheral portion 42 to ensure that the force is evenly transmitted to the peripheral portion 42 when subjected to stress. The connection can be a smooth transition 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 sealed path from the fixing portion 41 to the opening and closing portion 43. The above structure can ensure the installation stability of the airtight component 40 while maintaining the degree of 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 together. The first triangular piece 4311 and the second triangular piece 4312 are connected at a specific angle to form a stable three-dimensional cone structure. Between adjacent triangular pyramids 431, the base edge 431c of the first triangular piece 4311 of one triangular pyramid 431 is in close contact with the base edge 431c of the second triangular piece 4312 of the adjacent triangular pyramid 431. At the same time, the base edge 431c of the second triangular piece 4312 of the same triangular pyramid 431 abuts against the base edge 431c of the first triangular piece 4311 of another adjacent triangular pyramid 431. The interlocking structure between adjacent triangular pyramids 431 allows the airtight component 40 to form a uniformly distributed sealing interface, ensuring no leakage. At the same time, when the piercing rod 20 passes through, the different triangular pyramids 431 can expand outward synchronously and uniformly, providing multi-layer sealing protection. Even if a single component is slightly worn, the overall sealing performance can still be maintained. The mutual support between adjacent components enhances the stability of the overall structure. In some embodiments, the surfaces of the first triangular piece 4311 and the second triangular piece 4312 on the side opposite to the puncture channel 33 are convex arc surfaces. That is, the surfaces of each of the first triangular pieces 4311 and the second triangular piece 4312 on the side near the fixing part 41 are convex arc surfaces, and the arc surfaces are located on the side opposite to the puncture channel 33, corresponding to the contact surface of the puncture rod 20. The arc surface structure can naturally guide the puncture rod 20 into place, reduce the impact force at initial contact, and realize a gradual unfolding process.

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

[0040] See Figure 5 and Figure 6The airtight component 40 includes a support blade 4313, which is located on the side of the triangular pyramid 431 facing the puncture channel 33. Specifically, the triangular pyramid 431 extends away from the fixing part 41 at the connection point of the corresponding first triangular piece 4311 and second triangular piece 4312 to form the support blade 4313. The triangular pyramid 431 also extends towards the puncture channel 33 at the connection point of the corresponding first triangular piece 4311 and second triangular piece 4312, forming the support blade 4313. In other words, the support blade 4313 is located on the inner side of each triangular pyramid 431 facing the puncture channel 33. The support blade 4313 naturally extends from the connection point of the first triangular piece 4311 and second triangular piece 4312 and extends towards the puncture channel 33. The outer end of the support blade 4313 maintains stable contact with the peripheral wall of the mounting port 321, forming an integrated structure with the main structure of the triangular pyramid 431. The support blade 4313 provides additional mechanical support to the triangular pyramid 431, enhancing the stability of the overall structure and dispersing stress during the puncture operation. Simultaneously, the support blade 4313 and the slit 431a form a synergistic sealing system, which helps maintain the shape integrity of the airtight component 40, ensures the accuracy of the opening and closing action of the triangular cone 431, and limits excessive deformation of the triangular cone 431 during opening and closing. When the airtight component 40 is static, the support blade 4313 maintains slight tension and maintains contact pressure with the peripheral wall of the mounting port 321; when puncturing, the support blade 4313 moves in coordination with the triangular cone 431, providing a reverse support force to ensure the accuracy of the opening and closing action of the triangular cone 431. Through geometric relationships and mechanical cooperation, the support blade 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. The wavy structure has better elastic deformation capability, so that the puncture rod 20 does not require too much force to penetrate, thus improving the operability of the puncture device 10.

[0041] To ensure airtight installation and ease of maintenance, in some embodiments, the fixing part 41 is arranged in a ring shape. The ring shape provides uniform force distribution. The radial dimension of the fixing part 41 is larger than the radial dimension of the peripheral part 42, which is cylindrical and integrally formed with the fixing part 41. The diameter of the peripheral part 42 is slightly smaller than that of the fixing part 41, forming a stepped transition. Specifically, the annular protrusion 421 of the fixing part 41 smoothly overlaps the connecting part 32 of the puncture sleeve 30, forming a stable support platform that ensures accurate positioning of the airtight component 40. In some embodiments, through holes 4211 are provided on the protrusion 421. Multiple through holes 4211 can be provided, and the multiple through holes 4211 are spaced apart. The puncture device 10 also includes a fixing member 50. The connecting part 32 is provided with a locking hole 322, and the fixing member 50 is provided with a buckle 51. Multiple buckles 51 can be provided. The number of buckles 51 is the same as the number of through holes 4211 and locking holes 322. The buckles 51 pass through the through holes 4211 and are locked into the locking holes 322. The fixing member 50 presses the airtight member 40 onto the connecting part 32. During installation, the airtight component 40 is pre-positioned and placed at the pre-position of the connecting part 32. The position of the fastener 50 buckle 51 and the through hole 4211 is aligned. Appropriate pressure is applied to make the buckle 51 pass through the through hole 4211. A "click" sound indicates that the buckle 51 has been engaged in the locking hole 322. Further confirm that the fastener 50 is fully pressing the airtight component 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 1-10 The puncture device 10 according to a second aspect of the utility model includes a puncture rod 20, a puncture sleeve 30, and an airtight component 40. The puncture sleeve 30 includes a sleeve rod portion 31 and a connecting portion 32 connected together. A puncture channel 33 is formed in the puncture sleeve 30, and an installation port 321 is formed in the connecting portion 32, with the installation port 321 opposite to the puncture channel 33. The airtight component 40 includes a fixing portion 41, a peripheral portion 42, and an opening / closing portion 43 connected in sequence. The fixing portion 41 is fixed to the connecting portion. On 32, the peripheral side 42 abuts against the peripheral wall of the mounting port 321. The opening and closing part 43 includes three triangular pyramids 431 that are connected to each other. The two base edges 431c of one triangular pyramid 431 abut against the base edges 431c of the other triangular pyramids 431 respectively, so that the opening and closing part 43 forms three slits 431a. The slits 431a are directly opposite the puncture channel 33. The puncture rod 20 can abut against the slits 431a to pass through the airtight member 40 to reach the puncture channel 33.

[0043] The trocar 10 includes a trocar 20 and a trocar sheath 30. The trocar 20 is movably connected to the trocar sheath 30. The trocar 20 is typically a hollow cylinder used to house surgical instruments or operating parts. The trocar sheath 30 is a cannula covering the trocar 20, used to protect the surgical area and allow surgical instruments to pass through. Specifically, the trocar sheath 30 includes a connected sleeve portion 31 and a connecting portion 32. The sleeve portion 31 forms the main housing of the trocar sheath 30. A trocar channel 33 is formed inside the trocar sheath 30, through which the trocar 20 or external instruments can pass. The connecting portion 32 forms a mounting port 321 opposite to the trocar channel 33, into which an airtight component 40 can be fixed. The puncture rod 20 and puncture sheath 30 can be used for minimally invasive surgeries, such as laparoscopic surgery, thoracoscopic surgery, and neurosurgery. The puncture device 10 can reduce operation time, alleviate patient pain, reduce complications, and shorten recovery time.

[0044] In some embodiments, the puncture sheath 30 further includes a housing 34, an integrated connector 35, and a first silicone element 36. A first through-hole 361 is formed in the middle of the first silicone element 36. A sealing element 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 opened in the center of the horizontal portion 351. The horizontal portion 351 is engaged with the wall of the through-hole. The guide portion 352 includes a plurality of baffles 3521 extending from the horizontal portion 351 toward the sealing element 362. The plurality of baffles 3521 are arranged circumferentially along the second through-hole 3511 and are flexibly connected to the side of the horizontal portion 351 near the sealing element 362. Each baffle 3521 is bent toward the axis of the second through-hole 3511 and abuts against the sealing element 362 to guide the puncture rod 20. The puncture rod 20 passes through the second through-hole 3511 and the sealing element 362 of the integrated connector 35 in sequence. The puncture sleeve 30 provides a stable puncture channel and a sealing effect. The integrated connector improves the integration and sealing reliability of the puncture device. A first silicone element 36 is located inside the puncture sleeve 30, with a first through-hole 361 in its center for the insertion and exit of the puncture rod 20. A sealing element 362 is embedded in the wall of the first through-hole 361, which tightly fits the puncture rod 20 to prevent 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 puncture devices 10 have good corrosion resistance, resisting the erosion of bodily fluids and disinfectants, ensuring stability and safety during surgery. Stainless steel also has good biocompatibility, reducing the risk of allergic reactions and rejection. The heat-treated stainless steel puncture needle tip has moderate hardness, ensuring accuracy and safety during puncture. Plastic puncture devices 10 are lightweight, inexpensive, and highly disposable. They can be made of polycarbonate or ABS resin (thermoplastic polymer). Polycarbonate is a high-performance thermoplastic with high transparency, high strength, impact resistance, and good thermal stability. These properties make it an ideal material for manufacturing 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 reduce the generation of bubbles and defects. ABS resin is a commonly used thermoplastic with good mechanical and processing properties. It is often used to manufacture components such as the outer sheath and sealing pad of the puncture device 10. The advantages of ABS resin include good moldability and chemical resistance, making it suitable for use in medical devices that need to withstand certain chemical corrosion. In some embodiments, in addition to single-material stainless steel and plastic trocars, dual-material trocars 10 can also be provided. Dual-material trocars 10 combine the advantages of stainless steel and plastic, possessing both high strength and toughness, as well as being lightweight and easy to sterilize.

[0046] See Figure 7 and Figure 9 The integrated connector 35 adopts an integrated design to ensure structural stability and easy assembly. It consists of an annular horizontal portion 351 and a guide portion 352. Specifically, the horizontal portion 351 has an annular structure, and a second through-hole 3511 is opened in the center of the horizontal portion 351 for the passage of 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. Multiple bendable baffles 3521 extend from the horizontal portion 351 toward the sealing member 362. The multiple baffles 3521 are evenly arranged circumferentially along 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 machined as a single piece, making the puncture device 10 highly integrated and easy to assemble. In some embodiments, the integrated connector 35 is made of plastic, such as PE (polyethylene). The integrated connector 35 made of PE (polyethylene) has good corrosion resistance, flame retardancy, heat insulation and shock resistance, while also being strong in pressure resistance, easy to install, and having the functions of vibration reduction and buffering thermal expansion.

[0047] When the puncture rod 20 is inserted, the baffle 3521 can adaptively adjust its angle to guide the puncture rod 20 along the correct path, reducing deviation or friction and improving puncture accuracy. The puncture rod 20 is made of high-strength material, and its front end is designed with a sharp structure to facilitate tissue penetration. When the user uses the puncture device 10, the puncture rod 20 passes sequentially 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, preventing the puncture rod 20 from directly puncturing the seal 362 of the first silicone part 36, thereby improving the service life of the seal 362. When the puncture device 10 is used, the puncture rod 20 moves within the puncture sleeve 30. The baffle 3521 and the seal 362 work together to provide stable guidance and ensure sealing during the puncture process. Meanwhile, the bendable nature of the baffle 3521 allows it to adapt to puncture rods 20 of different diameters and automatically resets after puncture to maintain a sealed state. The integrated structure of the baffle 3521 and the horizontal part 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 gaps between adjacent baffles 3521. This allows the baffles 3521 to adjust their angle more flexibly when the puncture rod 20 is inserted, reducing the contact area with the puncture rod 20 and thus reducing frictional resistance, making the puncture process smoother. Since the baffles 3521 are not completely sealed, the puncture rod 20 can more naturally conform to the guiding direction of the baffles 3521 upon entry, avoiding deviation or jamming caused by rigid constraints. Simultaneously, the spacing design allows the baffles 3521 to deform independently under force, improving adaptability to puncture rods 20 of different diameters. In some embodiments, the spacing between adjacent baffles 3521 is less than or equal to 3mm. Even after the puncture rod 20 is fully inserted, the baffles 3521 can still uniformly conform to the sealing element 362, ensuring the airtightness of the puncture channel. When the puncture rod 20 is withdrawn, the elastic recovery capability of the baffle 3521 helps the seal 362 to quickly reset, preventing gas or liquid leakage. Simultaneously, arranging multiple baffles 3521 at intervals reduces material fatigue, preventing overall structural deformation or breakage due to long-term use and extending the service life of the puncture device 10. In some embodiments, six identical baffles 3521 are provided, arranged at intervals along the circumference of the second through-hole 3511.

[0049] See Figure 9In some embodiments, the baffle 3521 has openings 3521a on opposite sides of the second through-hole 3511 near the end of the horizontal portion 351. Each baffle 3521 has symmetrically extended openings 3521a on both sides of its root position where it connects to the horizontal portion 351. The two openings 3521a on each side of the baffle 3521 are not connected, ensuring that although the baffle 3521 narrows near the second through-hole 3511, the overall connection strength is maintained. The design of the openings 3521a significantly increases the flexibility of the baffle 3521's root, allowing it to deflect more freely when subjected to the force of the piercing rod 20, effectively reducing frictional resistance during piercing. After completing its guiding function, the baffle 3521 can quickly return to its initial position. In some embodiments, the opening 3521a extends circumferentially to narrow the width of the baffle 3521 near the horizontal portion 351. The opening 3521a gradually narrows from the root of the baffle 3521 towards the tip, forming a special structure similar to a "neck." The extension direction of the opening 3521a is consistent with the circumferential arrangement of the baffle 3521. The narrowed root structure forms a natural stress buffer area, which can prevent excessive stress concentration at the connection point. When the puncture rod 20 is inserted, the baffle 3521 can smoothly unfold outward, providing a continuous and stable guiding force. When the puncture rod 20 is pulled out, the baffle 3521 automatically resets, assisting the seal 362 in restoring its sealed state.

[0050] See Figures 7-9 The outer wall of the horizontal part 351 is provided with a first step 3512, and the wall of the first through-hole 361 is provided with a first groove 3611 on the side near the integrated connector 35. The first step 3512 is inserted into the first groove 3611. The connection between the integrated connector 35 and the first silicone part 36 is realized by the precise insertion of the first step 3512 into the first groove 3611, which can effectively prevent the components from loosening or shifting during use and improve the stability of the structure.

[0051] See Figure 10 The center of the seal 362 is provided with a first puncture hole 3621 so that the puncture rod 20 can pass through the seal 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 when the puncture rod 20 moves and reduce the operating 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 typically fixed to the metal rod body 22. The main function of the head 21 is to provide a grip point for easy user operation. In some embodiments, the head 21 can be designed with an ergonomic structure to ensure that the user does not experience fatigue during prolonged use. Furthermore, the material of the head 21 is usually the same as that of 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 typically a hollow structure to reduce overall weight and improve flexibility. The metal rod body 22 connects the head 21 and the blade head 23. The metal rod body 22 can be made of stainless steel to ensure 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 tip 231 and a connecting end 232. The connecting end 232 of the blade head 23 connects the blade head 23 to the metal rod 22, serving to connect the metal rod 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 22 in the length direction. This detachable connection facilitates the replacement of the blade head 23 during puncture of the rod 20, making replacement or maintenance easier. The first end 221 and the second end 222 are opposite each other. The blade tip 231 is the working part of the puncture rod 20, typically designed with a sharp or pointed shape for puncture or cutting. The puncture rod 20 provided in this application differs from the existing one-piece injection-molded blade rod and heat-shrink tubing structure. By designing the puncture rod 20 as a separate unit, the detachable blade head 23 facilitates replacement and maintenance, simplifies the assembly process, and is easy to operate, while also ensuring that the puncture rod 20 is not easily bent.

[0054] The housing 34 includes a main housing 341 and a cover 342, with the cover 342 covering the main housing 341. The housing 34 can be injection molded from a high-strength medical material. An integrated connector 35 and a first silicone component 36 are disposed within an accommodating space 343 formed between the main housing 341 and the cover 342. Specifically, in some embodiments, the top of the main housing 341 has a mounting groove 3411, within which the integrated connector 35 and the first silicone component 36 are disposed. The cover 342 abuts against the horizontal portion 351 to press the integrated connector 35 and the first silicone component 36 into the mounting groove 3411. When the puncture device 10 is installed, as the cover 342 is pressed down, its inner surface forms a surface contact with the horizontal portion 351 of the integrated connector 35. This evenly distributed pressure securely fixes the entire assembly system within the mounting groove 3411, preventing localized stress concentration and ensuring no deformation during long-term use.

[0055] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An airtight component, characterized in that, The airtight component includes a fixed part, a peripheral part, and an opening and closing part connected in sequence. The opening and closing part includes three triangular pyramids that are connected to each other. The two base edges of one of the triangular pyramids abut against the base edges of the other triangular pyramids to form three slits in the opening and closing part.

2. The airtight component according to claim 1, characterized in that, Two sides of each of the triangular pyramids are connected to the bottom end of the peripheral side portion, and the top end of the peripheral side portion is connected to the fixing portion. The side of each triangular pyramid is closer to the fixing portion than the bottom edge.

3. The airtight component according to claim 2, characterized in that, The triangular pyramid includes a first triangular piece and a second triangular piece connected together. The base of the first triangular piece of one triangular pyramid abuts against the base of the second triangular piece of an adjacent triangular pyramid, and the base of the second triangular piece abuts against the base of the first triangular piece of another adjacent triangular pyramid.

4. The airtight component according to claim 3, characterized in that, The same triangular pyramid includes three sides and two base sides. The two outer sides of the triangular pyramid are connected to the bottom of the peripheral portion, and the middle side is the connection point between the first triangular piece and the second triangular piece.

5. The airtight component according to claim 3, characterized in that, The triangular pyramid extends away from the fixed part at the connection point corresponding to the first and second triangular pieces to form a support blade.

6. The airtight component according to claim 5, characterized in that, The slits formed between the supporting blade at the bottom of one of the triangular pyramids and the other two triangular pyramids are located on the same plane.

7. The airtight component according to claim 5, characterized in that, Each of the first triangular piece and the second triangular piece has a convex arc surface on the side near the fixing part.

8. A puncture device, characterized in that, The device includes a puncture rod, a puncture sleeve, and an airtight component as described in any one of claims 1 to 7. The puncture sleeve includes a sleeve portion and a connecting portion connected together, forming a puncture channel in the puncture sleeve. An installation port is formed in the connecting portion, and the installation port is opposite to the puncture channel. The airtight component includes a fixing portion, a peripheral portion, and an opening and closing portion connected in sequence. The fixing portion is fixed to the connecting portion. The peripheral portion abuts against the peripheral wall of the installation port. The opening and closing portion includes three triangular pyramids that are connected to each other. Two base edges of one triangular pyramid abut against the base edges of different triangular pyramids to form three slits in the opening and closing portion. The slits are directly opposite the puncture channel. The puncture rod can abut against the slits to pass through the airtight component and reach the puncture channel.

9. The puncture device according to claim 8, characterized in that, The fixing part has a ring structure, and the peripheral part has a cylindrical structure. The peripheral part is connected to the bottom end of the fixing part. The radial dimension of the fixing part is larger than the radial dimension of the peripheral part to form a protrusion. The fixing part overlaps the protrusion of the peripheral part in the radial direction with the connecting part.

10. The puncture device according to claim 9, characterized in that, The protrusion has a through hole, the puncture device also includes a fixing member, the connecting part has a locking hole, the fixing member has a buckle, the buckle passes through the through hole and is locked into the locking hole, and the fixing member presses the airtight member to the connecting part.

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