Puncture rod and puncture outfit

Abstract

The puncture rod comprises a head portion, a metal rod body and a tool bit portion, the head portion is fixed at a first end of the metal rod body in the length direction, the tool bit portion comprises a tool bit end and a connecting end, the connecting end of the tool bit portion is detachably fixed at a second end of the metal rod body in the length direction, and the first end is opposite to the second end. According to the puncture rod and the puncture outfit, the puncture rod is designed in a split mode, the detachable cutter head part is convenient to replace and maintain, the assembly process is simple, operation is convenient, and the puncture rod is not prone to being bent.

Description

Technical Field

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

[0002] 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 serving 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 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 Once the trocar is inside the body cavity, the trocar is withdrawn, and the sleeve assembly can then serve as a minimally invasive instrument channel for performing endoscopic surgical procedures and endoscopic examinations. Existing trocars typically employ a one-piece or heat-shrink tubing structure, which is relatively complex in structure and assembly. Furthermore, the products are prone to deformation during injection molding and manufacturing, resulting in relatively weak strength during puncture. Utility Model Content

[0003] Based on this, this application provides a puncture rod, which is designed as a split puncture rod. The detachable blade head is easy to replace and maintain, the assembly process is simple, it is easy to operate, and the puncture rod is not easy to bend.

[0004] A 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 head 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.

[0005] The above-mentioned puncture rod has a gripping point at the head and a blade head for puncture. The connecting end of the blade head connects the metal rod body and the blade head. The connecting end of the blade head can be detachably fixed to the second end of the metal rod body in the length direction. The detachable connection method facilitates the replacement of the blade head, which is convenient for the replacement or maintenance of the puncture rod. At the same time, the metal rod structure allows the puncture rod to be easy to assemble and operate, while also ensuring that the puncture rod is not easily bent.

[0006] In one embodiment, the metal rod and the blade head form a continuous plane between their outer surfaces at the connection point. This continuous plane ensures smoothness and stability at the connection point. Setting the connection point as a continuous plane not only improves the aesthetics of the puncture rod but also reduces stress concentration at the connection point, thereby extending the service life of the puncture rod.

[0007] In one embodiment, the metal rod is a hollow rod. The hollow structure reduces overall weight and improves flexibility.

[0008] In one embodiment, the thickness of the metal rod is less than or equal to 2 mm. This smaller thickness ensures that the puncture rod is both strong and lightweight.

[0009] In one embodiment, the radial dimension of the metal rod at the second end is greater than the radial dimension of the first end, and the blade head is snapped and fixed to the second end. The larger radial dimension of the second end compared to the first end facilitates the snapping and fixing of the blade head.

[0010] In one embodiment, the metal rod has a locking protrusion in the inner wall of its second end, and a locking groove at the connecting end. The connecting end of the blade head extends into the second end of the metal rod, and the locking protrusion engages with the locking groove, thereby limiting the movement of the metal rod and the blade head along the length of the metal rod. The engagement of the locking protrusion and the locking groove ensures a secure and reliable connection between the blade head and the metal rod.

[0011] In one embodiment, a stepped surface is formed between the cutter tip and the outer side of the connecting end. A protrusion is provided on the outer side of the connecting end near the stepped surface. A limiting notch is formed at the edge of the tube opening at the second end of the metal rod. The protrusion engages in the limiting notch to prevent the cutter tip from rotating relative to the metal rod. The stepped surface creates a stable support structure between the cutter tip and the connecting end. During puncture, the stepped surface can distribute some of the pressure, reducing stress concentration at the connection between the cutter tip and the metal rod, extending the product's service life, improving the overall rigidity of the puncture rod, and ensuring it is not easily deformed or damaged during high-intensity operations. The matching design of the protrusion and the limiting notch makes the installation and removal of the cutter tip easier.

[0012] In one embodiment, the blade tip and the connecting end of the blade head have a transparent hollow structure. The transparent structure allows the user to directly observe the contact between the blade tip and the target being punctured, as well as the flow of fluid or tissue during the puncture process. The hollow structure design reduces the contact area between the blade tip and the target object during puncture, thereby reducing puncture resistance.

[0013] In one embodiment, the metal rod is made of stainless steel, and the blade head is made of plastic. The stainless steel rod has excellent strength, capable of withstanding the high pressure and repeated use during puncture operations, ensuring that the puncture rod is not easily bent or broken during operation, thus improving operational stability and safety.

[0014] A puncture device includes a puncture sheath and a puncture rod, the puncture rod being movably connected to the puncture sheath. The puncture sheath protects the surgical area and allows the puncture rod to pass through. By designing the puncture rod in a split configuration, the detachable blade head facilitates replacement and maintenance. The assembly process is simple and easy to operate, while also ensuring that the puncture rod is not easily bent. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0016] Figure 1 This is a schematic diagram of the puncture device according to one embodiment;

[0017] Figure 2 A cross-sectional view of a puncture device according to one embodiment;

[0018] Figure 3 This is a schematic diagram of the puncture device according to one embodiment;

[0019] Figure 4 An exploded view of a puncture device according to one embodiment.

[0020] Reference numerals: 10 puncture device; 20 puncture rod; 21 head; 22 metal rod body; 221 first end; 222 second end; 2221 limiting notch; 23 blade head; 231 blade tip; 232 connecting end; 2321 slot; 2322 protrusion; 233 stepped surface; 30 puncture sheath Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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 serving 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 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. Existing trocars typically employ a one-piece or heat-shrink tubing structure, which is relatively complex in structure and assembly. Furthermore, the products are prone to deformation during injection molding and manufacturing, resulting in relatively weak strength during puncture.

[0026] See Figures 1-4 To address the aforementioned problems, this application provides a puncture rod 20. Figure 1 This is a schematic diagram of the structure of the puncture device 10 according to one embodiment. Figure 2 This is a cross-sectional view of a puncture device 10 according to one embodiment. Figure 3 This is a schematic diagram of the structure of the puncture device 10 according to one embodiment. Figure 4This is an exploded view of a puncture device 10 according to an embodiment. The puncture rod 20 includes a head 21, a metal rod body 22, and a blade head 23. The head 21 is fixed to a first end 221 of the metal rod body 22 in the length direction. The blade head 23 includes a blade end 231 and a connecting end 232. The connecting end 232 of the blade head 23 is detachably fixed to a second end 222 of the metal rod body 22 in the length direction. The first end 221 and the second end 222 are opposite to each other.

[0027] See Figures 1-4 In the puncture rod 20 provided in this application, the puncture rod 20 is used in the puncture device 10. The puncture device 10 typically includes a puncture sheath 30 and a puncture rod 20. 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 operating parts. The puncture sheath 30 is a sleeve covering the rod of the puncture device 10, used to protect the surgical area and allow 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 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 gripping point for user operation. In some implementations, the head 21 can be ergonomically designed to prevent user fatigue during prolonged use. Furthermore, the head 21 is typically made of the same material as the metal rod 22 to ensure overall structural stability. The length and diameter of the metal rod 22 are designed according to the specific application. The metal rod 22 is usually hollow to reduce overall weight and improve flexibility. The metal rod 22 connects the head 21 and the blade head 23. The metal rod 22 can be made of stainless steel to ensure high strength and corrosion resistance.

[0028] See Figure 3 and Figure 4The 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.

[0029] 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. ABS resin offers advantages such as good moldability and chemical resistance, making it suitable for use in medical devices operating in environments requiring some degree of chemical corrosion. In some embodiments, in addition to single-material stainless steel and plastic trocars 10, dual-material trocars 10 can also be used. These trocars 10 combine the advantages of both stainless steel and plastic, possessing high strength and toughness while being lightweight and easy to sterilize. The emergence of dual-material trocars 10 provides medical personnel with more options, allowing them to select the appropriate trocar 10 based on specific surgical needs and patient conditions.

[0030] In some embodiments, the outer surfaces of the metal rod 22 and the blade head 23 at the connection point are continuous planes. This continuous plane ensures the smoothness and stability of the connection. Setting the connection point as a continuous plane not only improves the aesthetics of the puncture rod 20 but also reduces stress concentration at the connection, thereby extending the service life of the puncture rod 20. In some embodiments, the metal rod 22 has a hollow structure. This design reduces the overall weight of the puncture rod 20 while also improving its flexibility. Users can also install other auxiliary devices, such as sensors or wires, in the hollow area inside the metal rod 22 to expand the functionality of the puncture rod 20, depending on their needs.

[0031] See Figures 1-4 The thickness of the metal rod 22 can be set to less than or equal to 2mm. This smaller thickness ensures that the puncture rod 20 is both strong and lightweight. The radial dimension of the metal rod 22 at its second end 222 is larger than that at its first end 221 to facilitate the locking and fixing of the blade head 23. Specifically, the blade head 23 is locked and fixed to the second end 222. A locking protrusion 2322 is provided in the inner wall of the metal rod 22 at its second end 222, and a locking groove 2321 is provided at the connecting end 232. The locking protrusion 2322 and the locking groove 2321 are structurally compatible. When the connecting end 232 of the blade head 23 extends into the second end 222 of the metal rod 22, the locking protrusion 2322 engages with the locking groove 2321, thereby limiting the movement of the metal rod 22 and the blade head 23 along the length of the metal rod 22. The engagement of the snap-fit ​​protrusion 2322 and the slot 2321 allows the blade head 23 to be limited along the length of the metal rod 22, preventing the blade head 23 from moving axially during puncture and avoiding inaccurate puncture depth due to axial movement.

[0032] When using the puncture rod 20, the operator can first insert the connecting end 232 of the blade head 23 into the second end 222 of the metal rod body 22. Further, ensure that the engaging protrusion 2322 is aligned with the slot 2321, and gently press the blade head 23 until the engaging protrusion 2322 is engaged in the slot 2321. Further, check whether the blade head 23 is firmly fixed, ensuring that the engaging protrusion 2322 is engaged in the limiting notch 2221 to prevent rotation of the blade head 23. In some embodiments, the engaging protrusion 2322 can be configured as a cuboid structure, and the slot 2321 can be configured as an elongated concave groove. The width of the cuboid structure is slightly smaller than the width of the elongated concave groove to ensure that the engaging protrusion 2322 can be engaged in the slot 2321.

[0033] In some embodiments, a stepped surface 233 is formed between the cutter tip 231 and the outer side of the connecting end 232. The stepped surface 233 allows for a smooth transition between the connecting end 232 and the cutter tip 231. The design of the stepped surface 233 enables a stable support structure to be formed between the cutter tip 231 and the connecting end 232. During the puncture process, the stepped surface 233 can share some of the pressure, reduce stress concentration at the connection between the cutter tip 231 and the metal rod 22, extend the service life of the product, improve the overall rigidity of the puncture rod 20, and ensure that it is not easily deformed or damaged during high-intensity operations.

[0034] During the puncture operation, the stability of the blade tip 231 is crucial. If the blade tip 231 rotates, the puncture angle may deviate from the target, affecting operational accuracy and even causing damage. To prevent the blade tip 23 from rotating during use, a protrusion 2322 is provided on the outer side of the connecting end 232 near the stepped surface 233. A limiting notch 2221 is formed at the edge of the tube opening of the second end 222 of the metal rod 22. The dimensions of the protrusion 2322 and the limiting notch 2221 are matched, allowing the protrusion 2322 to engage with the limiting notch 2221, preventing the blade tip 231 from rotating relative to the metal rod 22 and ensuring the stability of the puncture operation. When using the puncture rod 20, the user simply inserts the connecting end 232 of the blade tip 23 into the second end 222 of the metal rod 22 and rotates it until the protrusion 2322 engages with the limiting notch 2221 to complete the installation. During disassembly, simply rotate the cutter head 23 in the reverse direction to disengage the protrusion 2322 from the limiting notch 2221, and the cutter head 23 can be easily removed. The design of the stepped surface 233 and the protrusion 2322 increases the contact area between the cutter head 23 and the metal rod 22, and achieves mechanical locking through the limiting notch 2221, ensuring a more secure connection between the cutter head 23 and the metal rod 22, and preventing loosening or detachment during use.

[0035] In some embodiments, the blade head 23 can be made of plastic and has a transparent hollow structure, facilitating observation of the puncture process. The plastic material has a certain degree of flexibility, which can reduce damage to the punctured object, and is also easy to clean and disinfect. In some embodiments, the protrusion 2322 can have a semi-circular cross-section, and the limiting notch 2221 is set as a semi-circular notch, wherein the diameter of the circle containing the semi-circular structure is less than or equal to the diameter of the circle containing the limiting notch 2221.

[0036] In some embodiments, the blade tip 231 and connecting end 232 of the blade head 23 are transparent and hollow. This not only enhances the functionality and practicality of the puncture rod 20 but also improves its adaptability and safety in different application scenarios. Making the blade head 23 transparent facilitates observation of the puncture process, improving operational accuracy and safety. It also facilitates inspection and maintenance, thus extending the service life of the puncture device 10. For example, in medical surgery, doctors can observe the puncture depth, angle, and whether the target area (such as blood vessels or tissue) has been successfully entered in real time, thereby improving the precision and safety of the surgery. In laboratory operations, users can observe the sample collection process to ensure sample integrity and accuracy. In industrial testing, operators can observe the flow of liquids or gases to ensure the reliability of test results. Simultaneously, the hollow structure reduces the weight of the blade head 23, improving operational flexibility and comfort. The hollow structure design reduces the contact area between the tip 231 and the target object during puncture, thereby reducing puncture resistance, making the puncture process smoother, and minimizing damage to the puncture object. In the medical field, this reduces trauma to patient tissues and lowers the risk of postoperative complications. In laboratory and industrial applications, it improves puncture efficiency and reduces operation time. Simultaneously, the hollow structure reduces the amount of material used in the tip 23, thus reducing the overall weight. This reduces the operator's burden, especially during prolonged operations, reducing hand fatigue and improving operational flexibility and precision, particularly in scenarios requiring fine control. Furthermore, the hollow structure allows the tip 231 to serve as a liquid or gas transport channel. For example, in the medical field, it can be used to draw blood, tissue fluid, or inject drugs, achieving multiple uses in one device; in the laboratory field, it can be used to collect liquid samples or transport reagents, improving experimental efficiency. In the industrial field, it can be used for liquid or gas sampling and detection, expanding the application range of the puncture rod 20.

[0037] In some embodiments, the metal rod 22 is made of stainless steel, and the blade head 23 is made of plastic. The stainless steel metal rod 22 possesses excellent mechanical strength, capable of withstanding the high pressure and repeated use during puncture operations, ensuring that the puncture rod 20 is not easily bent or broken during operation, thus improving operational stability and safety. It is also suitable for high-intensity puncture operations, such as deep tissue punctures in medical surgery or hard material punctures in industrial testing. In the medical field, the puncture rod 20 is easily exposed to the corrosive effects of disinfectants (such as alcohol and iodine). The stainless steel puncture rod 20 can withstand the corrosion of disinfectants, extending its service life. Stainless steel meets medical-grade standards and has good biocompatibility. During medical surgery, stainless steel will not cause adverse reactions to human tissue, ensuring surgical safety. The smooth surface of stainless steel does not easily attract dirt, facilitating cleaning and disinfection. The blade head 23 is made of plastic, allowing for a transparent design that facilitates observation of the puncture process. Simultaneously, the plastic material's flexibility reduces damage to the puncture site. In the medical field, this minimizes trauma to patient tissues and lowers the risk of postoperative complications. In the laboratory field, it reduces damage to cells or tissues, ensuring sample integrity. Furthermore, the low density and light weight of the plastic material reduce the overall weight of the blade head 23, lessening the operator's burden, especially during prolonged operations, and reducing hand fatigue.

[0038] The puncture device 10 of the second aspect of this utility model includes a puncture sheath 30 and a puncture rod 20. The puncture rod 20 is movably connected to the puncture sheath 30, and the puncture sheath 30 covers the puncture rod 20 to protect the surgical area and allow surgical instruments to pass through. Since this embodiment adopts all the technical features of the puncture rod 20 of the first aspect embodiment, this embodiment has all the beneficial effects brought by the first aspect embodiment, which will not be repeated here.

[0039] 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.

[0040] 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 rod, characterized in that, It includes a head, a metal rod, and a blade head. The head is fixed to a first end of the metal rod in the length direction. The blade head includes a blade tip and a connecting end. The connecting end of the blade head is detachably fixed to a second end of the metal rod in the length direction. The first end and the second end are opposite to each other.

2. The puncture rod according to claim 1, characterized in that, The outer surfaces of the metal rod and the blade head at the connection point form a continuous plane.

3. The puncture rod according to claim 1, characterized in that, The metal rod is a hollow rod.

4. The puncture rod according to claim 3, characterized in that, The thickness of the metal rod is less than or equal to 2 mm.

5. The puncture rod according to claim 3, characterized in that, The radial dimension of the metal rod at the second end is greater than that at the first end, and the blade head is snapped and fixed to the second end.

6. The puncture rod according to claim 3 or 5, characterized in that, The metal rod has a snap-fit ​​protrusion in the inner tube wall at the second end, and a slot is provided at the connecting end. The connecting end of the blade head extends into the second end of the metal rod, and the snap-fit ​​protrusion is engaged in the slot, so that the metal rod and the blade head are limited in the length direction of the metal rod.

7. The puncture rod according to claim 3 or 5, characterized in that, The cutter head forms a stepped surface between the outer side of the connecting end and the cutter head. The outer side of the connecting end has a protrusion on the side near the stepped surface. The metal rod forms a limiting notch at the edge of the tube opening at the second end. The protrusion is inserted into the limiting notch to prevent the cutter head from rotating relative to the metal rod.

8. The puncture rod according to claim 1, characterized in that, The blade head and the connecting end of the blade head have a transparent hollow structure.

9. The puncture rod according to claim 1, characterized in that, The metal rod is made of stainless steel, and the blade head is made of plastic.

10. A puncture device, characterized in that, It includes a puncture sheath and a puncture rod as described in any one of claims 1 to 9, the puncture rod being movably connected to the puncture sheath.

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