Piercing device

Abstract

The utility model relates to a kind of puncture apparatus, and puncture apparatus includes the puncture rod and puncture cover of movable connection, and puncture cover includes shell, integral connector and first silica gel part, first silica gel part middle part forms first through hole, and the wall surface of first through hole is equipped with sealing element, integral connector includes annular horizontal part and guide portion, and horizontal part center is equipped with second through hole, and horizontal part is clamped in the wall surface of through hole, and guide portion includes the multiple baffle that extend from horizontal part to the side of sealing element, and multiple baffle is arranged along the circumference of second through hole and is flexibly connected in the side of horizontal part close to sealing element, each baffle is bent to the axis of second through hole and is abutted with sealing element to realize the guidance to puncture rod, and puncture rod passes second through hole of integral connector and sealing element in turn. The puncture apparatus provided in the application, by integrally designing connector, improve the integration and sealing reliability of puncture apparatus.

Description

Technical Field

[0001] This utility model relates to the field of puncture technology, and in particular to 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 Once the trocar is inside the body cavity, the trocar is withdrawn, and the sleeve assembly serves as a minimally invasive instrument channel for performing endoscopic surgical procedures and endoscopic examinations.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] Existing trocars often employ a split-type guide structure, which not only increases assembly complexity but may also lead to unstable sealing performance or insufficient guiding accuracy. Especially after repeated punctures, the split structure is prone to wear or displacement, affecting the overall reliability of the instrument. Therefore, there is an urgent need for a highly integrated trocar with reliable sealing. Utility Model Content

[0004] Based on this, this application provides a puncture device that improves the integration and sealing reliability of the puncture device by integrating the connector into one piece.

[0005] A puncture device includes a movably connected puncture rod and a puncture sleeve. The puncture sleeve includes a housing, an integral connector, and a first silicone element. A first through-hole is formed in the middle of the first silicone element, and a sealing element is provided on the wall of the first through-hole. The integral connector includes an annular horizontal portion and a guide portion. A second through-hole is formed in the center of the horizontal portion. The horizontal portion is engaged with the wall of the through-hole. The guide portion includes a plurality of baffles extending from the horizontal portion toward the sealing element. The plurality of baffles are arranged circumferentially along the second through-hole and are flexibly connected to the side of the horizontal portion near the sealing element. Each baffle is bent toward the axis of the second through-hole and abuts against the sealing element to guide the puncture rod. The puncture rod passes sequentially through the second through-hole of the integral connector and the sealing element.

[0006] The above-mentioned puncture device has a horizontal section that tightly engages with the wall of the first through-hole. Multiple bendable baffles extend from the horizontal section towards the seal, evenly distributed around the circumference of the second through-hole and naturally bending towards the central axis to contact the seal. When the puncture rod is inserted, the baffles adaptively adjust their angle, guiding the rod along the correct path, reducing deviation or friction, and improving puncture accuracy. Guided by the baffles, the puncture rod smoothly enters the target position. The integrated design of the connector enhances the device's integration and sealing reliability.

[0007] In one embodiment, the baffles are spaced apart circumferentially adjacent to each other along the second through-hole.

[0008] In one embodiment, the spacing between adjacent baffles is less than or equal to 3 mm.

[0009] In one embodiment, the baffle has openings on opposite sides of the second through-hole near the horizontal end, and the openings extend circumferentially to narrow the width of the baffle near the horizontal end.

[0010] In one embodiment, the outer wall of the horizontal portion is provided with a first step, and the wall surface of the first through opening is provided with a first groove on the side near the integral connector, and the first step is engaged with the first groove.

[0011] In one embodiment, the seal has a first puncture hole at its center so that the puncture rod can pass through the seal.

[0012] In one embodiment, the puncture rod includes a head, a metal rod body, and a blade head. The head is fixed to a first end of the metal rod body in the length direction. The blade head includes a blade tip and a connecting end. The connecting end of the blade tip is detachably fixed to a second end of the metal rod body in the length direction. The first end and the second end are opposite to each other.

[0013] In one embodiment, the housing includes a main shell and a cover, the cover being disposed on the main shell, and the integral connector and the first silicone component being disposed within an accommodating space formed between the main shell and the cover.

[0014] In one embodiment, the top of the main shell has a mounting groove, the integrated connector and the first silicone part are disposed in the mounting groove, and the cover abuts against the horizontal part to press the integrated connector and the first silicone part into the mounting groove.

[0015] In one embodiment, the baffle has six pieces, and the one-piece connector is made of plastic. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the puncture device according to one embodiment;

[0018] Figure 2 An exploded view of a portion of the structure of a puncture device according to an embodiment;

[0019] Figure 3 This is a schematic diagram of the structure of an integrated connector according to one embodiment;

[0020] Figure 4 This is a schematic diagram of the structure of a sealing element according to one embodiment;

[0021] Figure 5 for Figure 1 A sectional view;

[0022] Figure 6 This is a schematic diagram of the puncture device according to one embodiment;

[0023] Figure 7 An exploded view of a puncture device according to one embodiment.

[0024] 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 housing; 311 main housing; 3111 mounting groove; 312 cover; 313 accommodating space; 32 integrated connector; 32 horizontal part; 321 second through-hole; 3211 first step; 3212 guide part; 3221 baffle; 3221 opening; 3221a; 33 first silicone part; 33 first through-hole; 331 first groove; 3311 sealing element; 332 first puncture hole; 3321 Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] A trocar is a surgical instrument used to puncture the abdominal wall and provide access to body cavities for other surgical instruments; it belongs to the category of minimally invasive surgical instruments. A trocar typically includes a sleeve assembly that serves as the access 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, the tip of the trocar 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 can then serve as a minimally invasive instrument channel for performing endoscopic surgical procedures and endoscopic examinations. In existing trocars, the guiding structure is often a split design, which not only increases assembly complexity but may also lead to unstable sealing performance or insufficient guiding accuracy. Especially after repeated puncture operations, the split structure is prone to wear or displacement, affecting the overall reliability of the instrument. Some puncture devices use rigid guide rings or fixed baffles, which can provide initial guidance for the puncture rod, but are difficult to adapt to puncture rods of different diameters or compensate for deviations during the puncture process, easily leading to accelerated wear of the seals or increased puncture resistance. The internal components of the puncture sleeve are numerous and not well integrated, with multiple parts at risk of loose connections or seal failure, and may detach due to elastic fatigue after repeated use. Therefore, there is an urgent need for a puncture device with high integration and reliable sealing.

[0030] See Figures 1 to 7 To address the aforementioned problems, this application provides a puncture device 10. Figure 1 This is a schematic diagram of the puncture device according to one embodiment. Figure 2This is an exploded view of a portion of the structure of a puncture device according to one embodiment. Figure 3 This is a schematic diagram of the structure of an integrated connector according to one embodiment. Figure 4 This is a schematic diagram of the structure of a sealing element according to one embodiment. Figure 5 for Figure 1 sectional view, Figure 6 This is a schematic diagram of the puncture device according to one embodiment. Figure 7 This is an exploded view of a puncture device according to an embodiment. The puncture device 10 includes a movably connected puncture rod 20 and a puncture sleeve 30. The puncture sleeve 30 includes a housing 31, an integral connector 32, and a first silicone component 33. A first through-hole 331 is formed in the middle of the first silicone component 33. A sealing component 332 is provided on the wall surface of the first through-hole 331. The integral connector 32 includes an annular horizontal portion 321 and a guide portion 322. A second through-hole 3211 is opened in the center of the horizontal portion 321. The horizontal portion 321 is engaged with the wall surface of the through-hole. The guide portion... 322 includes a plurality of baffles 3221 extending from the horizontal portion 321 toward the seal 332. The plurality of baffles 3221 are arranged circumferentially along the second through-hole 3211 and are flexibly connected to the side of the horizontal portion 321 near the seal 332. Each baffle 3221 is bent toward the axis of the second through-hole 3211 and abuts against the seal 332 to guide the piercing rod 20. The piercing rod 20 passes through the second through-hole 3211 of the integral connector 32 and the seal 332 in sequence.

[0031] See Figures 1 to 7 The puncture rod 20 is movably connected to the puncture sheath 30. The puncture rod 20 is typically a hollow cylinder used to house surgical instruments or manipulation components. The puncture sheath 30 is a cannula covering the puncture rod 20, protecting the surgical area and allowing surgical instruments to pass through. The puncture rod 20 and puncture sheath 30 are commonly used in minimally invasive surgeries such as laparoscopic surgery, thoracoscopic surgery, and neurosurgical procedures. These puncture devices 10 can reduce surgical time, alleviate patient pain, reduce complications, and shorten recovery time. The puncture sheath 30 includes a housing 31, an integrated connector 32, and a first silicone element 33. The puncture sheath 30 provides a stable puncture channel and a sealing effect. The integrated connector improves the integration and sealing reliability of the puncture device. The first silicone element 33 is located inside the puncture sheath 30, with a first through-hole 331 in its center for the insertion and exit of the puncture rod 20. The wall of the first penetration 331 is fitted with a seal 332, which can fit tightly against the puncture rod 20 to prevent gas or liquid leakage and reduce frictional resistance.

[0032] The puncture device 10 can be made of stainless steel or plastic. Stainless steel puncture devices 10 have excellent 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 making 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 make components such as the outer cannula 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 puncture devices 10, dual-material puncture devices 10 can also be provided. Such puncture devices 10 combine the advantages of stainless steel and plastic, possessing both high strength and high toughness, as well as being lightweight and easy to sterilize.

[0033] See Figure 2 and Figure 3 The integrated connector 32 adopts an integrated design to ensure structural stability and easy assembly. It consists of an annular horizontal portion 321 and a guide portion 322. Specifically, the horizontal portion 321 has an annular structure, and a second through-hole 3211 is opened in the center of the horizontal portion 321 for the passage of the puncture rod 20. The horizontal portion 321 is tightly engaged with the wall surface of the first through-hole 331 to ensure the stability of the overall structure. Multiple bendable baffles 3221 extend from the horizontal portion 321 toward the sealing element 332. The multiple baffles 3221 are evenly arranged circumferentially along the second through-hole 3211 and naturally bend toward the central axis to contact the sealing element 332. In some embodiments, the entire connector is machined as a single piece, resulting in a high degree of integration of the puncture device 10 and facilitating assembly. In some embodiments, the integrated connector 32 is made of plastic, such as PE (polyethylene). The integrated connector 32 made of PE (polyethylene) has good anti-corrosion, flame retardant, heat insulation and shock absorption properties, while also being strong in pressure resistance, easy to install, and having the functions of vibration reduction and buffering thermal expansion.

[0034] When the puncture rod 20 is inserted, the baffle 3221 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 3211 of the integrated connector 32 and the first puncture hole 3321 of the seal 332. Guided by the baffle 3221, it smoothly enters the target position, preventing the puncture rod 20 from directly puncturing the seal 332 of the first silicone part 33, thereby improving the service life of the seal 332. When the puncture device 10 is used, the puncture rod 20 moves within the puncture sleeve 30. The baffle 3221 and the seal 332 work together to provide stable guidance and ensure sealing during the puncture process. Meanwhile, the bendable nature of the baffle 3221 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 3221 and the horizontal part 321 can improve the integration and sealing reliability of the puncture device 10.

[0035] See Figure 2 and Figure 3 Multiple baffles 3221 are arranged circumferentially along the second through-hole 3211, with appropriate gaps between adjacent baffles 3221. This allows the baffles 3221 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 3221 are not completely sealed, the puncture rod 20 can more naturally conform to the guiding direction of the baffles 3221 upon entry, avoiding deviation or jamming caused by rigid constraints. Simultaneously, the spacing design allows the baffles 3221 to deform independently under force, improving adaptability to puncture rods 20 of different diameters. In some embodiments, the spacing between adjacent baffles 3221 is less than or equal to 3mm. Even after the puncture rod 20 is fully inserted, the baffles 3221 can still uniformly conform to the sealing element 332, ensuring the airtightness of the puncture channel. When the puncture rod 20 is withdrawn, the elastic recovery capability of the baffle 3221 helps the seal 332 to quickly reset, preventing gas or liquid leakage. Simultaneously, arranging multiple baffles 3221 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 3221 are provided, arranged at intervals circumferentially along the second through-hole 3211.

[0036] See Figure 3In some embodiments, the baffle 3221 has openings 3221a on opposite sides of the second through-hole 3211 near the end of the horizontal portion 321. Each baffle 3221 has symmetrically extended openings 3221a on both sides of its root position where it connects to the horizontal portion 321. The two openings 3221a on each side of the baffle 3221 are not connected, ensuring that although the baffle 3221 narrows near the second through-hole 3211, the overall connection strength is maintained. The design of the openings 3221a significantly increases the flexibility of the baffle 3221'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 3221 can quickly return to its initial position. In some embodiments, the opening 3221a extends circumferentially to narrow the width of the baffle 3221 near the horizontal portion 321. The opening 3221a gradually narrows from the root of the baffle 3221 towards the tip, forming a special structure similar to a "neck." The extension direction of the opening 3221a is consistent with the circumferential arrangement of the baffle 3221. 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 3221 can smoothly unfold outward, providing a continuous and stable guiding force. When the puncture rod 20 is pulled out, the baffle 3221 automatically resets, assisting the seal 332 in restoring its sealed state.

[0037] See Figure 2 The outer wall of the horizontal part 321 is provided with a first step 3212, and the wall surface of the first through-hole 331 is provided with a first groove 3311 on the side near the integrated connector 32. The first step 3212 is inserted into the first groove 3311. The connection between the integrated connector 32 and the first silicone part 33 is achieved by the first step 3212 being precisely inserted into the first groove 3311. This can effectively prevent the components from loosening or shifting during use and improve the stability of the structure.

[0038] See Figure 4 The center of the seal 332 is provided with a first puncture hole 3321 so that the puncture rod 20 can pass through the seal 332. The diameter of the first puncture hole 3321 can be adjusted according to actual needs. In some embodiments, the hole wall of the first puncture hole 3321 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.

[0039] See Figure 1 , Figure 5 and Figure 7The 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.

[0040] See Figures 5-7 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.

[0041] See Figure 2 The housing 31 includes a main housing 311 and a cover 312, with the cover 312 covering the main housing 311. The housing 31 can be injection molded from a high-strength medical material. An integrated connector 32 and a first silicone component 33 are disposed within an accommodating space 313 formed between the main housing 311 and the cover 312. Specifically, in some embodiments, the top of the main housing 311 has a mounting groove 3111, within which the integrated connector 32 and the first silicone component 33 are disposed. The cover 312 abuts against the horizontal portion 321 to press the integrated connector 32 and the first silicone component 33 into the mounting groove 3111. When the puncture device 10 is installed, as the cover 312 is pressed down, its inner surface forms a surface contact with the horizontal portion 321 of the integrated connector 32. The uniformly distributed pressure securely fixes the entire component system within the mounting groove 3111, avoiding localized stress concentration and ensuring that it will not deform during long-term use.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] 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. A puncture device, characterized in that, The puncture device includes a movably connected puncture rod and a puncture sleeve. The puncture sleeve includes a housing, an integral connector, and a first silicone component. A first through-hole is formed in the middle of the first silicone component. A sealing element is provided on the wall of the first through-hole. The integral connector includes an annular horizontal portion and a guide portion. A second through-hole is opened in the center of the horizontal portion. The horizontal portion is engaged with the wall of the through-hole. The guide portion includes a plurality of baffles extending from the horizontal portion toward the sealing element. The plurality of baffles are arranged circumferentially along the second through-hole and are flexibly connected to the side of the horizontal portion near the sealing element. Each baffle is bent toward the axis of the second through-hole and abuts against the sealing element to guide the puncture rod. The puncture rod passes sequentially through the second through-hole of the integral connector and the sealing element.

2. The puncture device according to claim 1, characterized in that, The baffles are spaced apart along the circumference of the second through opening.

3. The puncture device according to claim 2, characterized in that, The spacing between adjacent baffles is less than or equal to 3 mm.

4. The puncture device according to claim 2, characterized in that, The baffle has openings on opposite sides of the second through-hole near the horizontal end, and the openings extend circumferentially to narrow the width of the baffle near the horizontal end.

5. The puncture device according to claim 1, characterized in that, The outer wall of the horizontal part is provided with a first step, and the wall surface of the first through opening is provided with a first groove on the side near the integral connector, and the first step is inserted into the first groove.

6. The puncture device according to claim 1, characterized in that, The seal has a first puncture hole in its center so that the puncture rod can pass through the seal.

7. The puncture device according to claim 1, characterized in that, The puncture rod includes a head, a metal rod body, and a blade head. The head is fixed to a first end of the metal rod body in the length direction. The blade head includes a blade tip and a connecting end. The connecting end of the blade tip is detachably fixed to a second end of the metal rod body in the length direction. The first end and the second end are opposite to each other.

8. The puncture device according to claim 1, characterized in that, The housing includes a main shell and a cover, the cover being disposed on the main shell, and the integrated connector and the first silicone component being disposed within the accommodating space formed between the main shell and the cover.

9. The puncture device according to claim 8, characterized in that, The top of the main shell has a mounting groove, the integrated connector and the first silicone component are disposed in the mounting groove, and the cover abuts against the horizontal part to press the integrated connector and the first silicone component into the mounting groove.

10. The puncture device according to claim 1, characterized in that, The baffle has six pieces, and the integrated connector is made of plastic.

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