Modularized liposuction needle
By using modular design and PTFE-coated liposuction cannulas, the problems of easy damage, difficult cleaning, and high friction of existing liposuction cannulas have been solved, achieving easy maintenance, low cost, and high efficiency in fat removal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-25
- Publication Date
- 2026-04-21
AI Technical Summary
Existing liposuction needles are fragile and easily damaged, difficult to clean and disinfect, have high friction, and pose safety hazards, affecting surgical results and costs.
It adopts a modular design, including a needle handle module, a needle body module, and a needle tip module. Each part is detachable for easy maintenance and replacement. The needle body adopts a split structure and a polytetrafluoroethylene coating to reduce friction.
Avoid complete waste, reduce costs, improve operational safety and fat graft survival rate, simplify cleaning and maintenance, and reduce the risk of cell damage.
Smart Images
Figure CN121891631A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to medical devices, specifically to a modular liposuction needle. Background Technology
[0002] Liposuction involves inserting a hollow liposuction cannula into a tiny incision in the skin, connecting it to a negative pressure suction device, to physically and selectively remove subcutaneous fat tissue, achieving the purpose of local sculpting and body contour reshaping.
[0003] As the core instrument in liposuction, the quality of the liposuction cannula directly affects the safety of the surgery or treatment, the doctor's operating experience, and the patient's surgical outcome. However, existing liposuction cannulas are hollow stainless steel tubes approximately 40cm in length and 1.5–3.5mm in diameter. The side holes at the tip are typically concentrated within a 2cm range, presenting the following drawbacks: First, they are structurally fragile and difficult to maintain, with stress concentrated at the tip, making them prone to plastic deformation or metal fatigue during use. Once deformation occurs, the entire cannulas becomes unusable, resulting in resource waste and increased surgical costs. Second, the narrow needle tract makes thorough cleaning and disinfection difficult post-operatively, and it's impossible to observe internal wear or burr formation, posing safety risks. Third, limited by current stainless steel processing technology, the inner and outer surfaces of the cannulas are relatively rough. During use, the rough outer surface generates significant friction due to reciprocating motion within the tissue, increasing the surgeon's workload and potentially causing skin burns due to frictional heat. The rough inner surface also causes additional shearing and grinding of fat cells during suction, leading to increased cell breakage, decreased viable cell retrieval, and negatively impacting subsequent fat grafting results, increasing the risk of post-operative inflammation, and reducing fat graft survival rates. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a modular liposuction needle, which has the advantages of modular structure, easy maintenance and low friction.
[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A modular liposuction needle includes a needle handle module, a needle body module and a needle tip module. The tail end of the needle body module is installed in the needle handle module, the needle tip module is installed at the head end of the needle body module, and the needle tip module is connected to the interior of the needle body module to form a needle channel.
[0006] The beneficial effects of this invention are: the modular design of the liposuction needle allows for the individual replacement of easily damaged parts, avoiding the need for complete disposal due to local damage, thus preventing waste and reducing costs.
[0007] Based on the above technical solution, the present invention can be further improved as follows.
[0008] Furthermore, the needle body module includes a needle tube body, which is formed by two arc-shaped parts joined together by an interlocking structure.
[0009] The beneficial effect of adopting the above-mentioned further solution is that the needle body adopts a split structure, which is convenient to open and easy to clean, and can detect whether there are burrs or wear inside at any time, thus eliminating the surgical risks caused by hidden damage to the instrument.
[0010] Furthermore, the needle body is provided with an anti-slip block near the tail end, and the anti-slip block is engaged in a slot within the needle handle module.
[0011] The beneficial effect of adopting the above-mentioned further solution is that the anti-slip block and the slot cooperate to prevent relative sliding between the needle body module and the needle handle module, and simplify the installation of the needle body module and the needle handle module.
[0012] Furthermore, the tail end of the needle tube body has an enlarged portion, part of which is located outside the needle handle module for connection with the suction device. The head end of the needle tube body has a connecting portion, which is provided with external threads for connection with the needle tip module. The outer diameter of the enlarged portion is larger than the outer diameter of the middle part of the needle tube body, and the outer diameter of the middle part of the needle tube body is larger than the outer diameter of the connecting portion. The needle channel is a straight channel with equal diameter.
[0013] The advantages of adopting the above-mentioned further solution are that the enlarged part is convenient to connect to the pipe of the suction device, and the head end connection part is convenient to connect to the needle tip module.
[0014] Furthermore, the needle tip module includes a needle body, the first end of which is a blunt needle tip, and the tail end of which is threaded to a connecting part. The middle part of the needle body is provided with multiple side holes, which are arranged spirally on the needle body, and each side hole is connected to the needle channel.
[0015] The beneficial effect of adopting the above-mentioned further solution is that the spiral arrangement of multiple side holes can effectively disperse stress, avoid stress concentration, and cover all liposuction directions, thereby improving liposuction efficiency.
[0016] Furthermore, the needle tip module also includes an anti-loosening nut, which includes a nut body and a first extension. The first extension is fixed axially to one end of the nut body. Both the nut body and the first extension are provided with internal threads. The tail end of the needle body is provided with internal threads. The tail end face of the needle body extends axially outward to form a second extension. The second extension overlaps the outside of the first extension. The external threads of the connecting part are sequentially connected to the internal threads of the nut body, the first extension, and the tail end of the needle body.
[0017] The beneficial effect of adopting the above-mentioned further solution is that the anti-loosening nut can ensure a stable connection between the needle body and the needle tube body. At the same time, the inner wall of the needle tube body connection part is smoothly connected with the inner wall of the needle body, avoiding damage to fat cells at the joint.
[0018] Furthermore, the outer walls of the needle body, the needle tube body, and the needle channel wall are all coated with a polytetrafluoroethylene coating.
[0019] The beneficial effects of adopting the above-mentioned further solution are that the part of the liposuction needle that comes into contact with the fat tissue is coated with a polytetrafluoroethylene coating, which greatly reduces the roughness of the outer wall of the needle body and the needle tube body, and lowers the coefficient of friction (the coefficient of friction of stainless steel is 0.15-0.40, while that of polytetrafluoroethylene is 0.04-0.05). This reduces the physical exertion of the doctor and eliminates the possibility of skin burns caused by friction. The smooth sidewall of the needle tract and the extremely smooth inner surface of the needle tract reduce the mechanical damage to fat cells during the aspiration process and improve the survival rate of transplantation. At the same time, the coating also helps to seal the joint surface of the liposuction needle.
[0020] Furthermore, the needle handle module includes a housing formed by two separate housings, the internal space of the housing serving as a receiving cavity, the sidewalls of the receiving cavity being provided with slots, and the opposite ends of the receiving cavity being provided with openings to form needle channels.
[0021] The advantage of adopting the above-mentioned further solution is that the split shell makes it convenient to install and fix the two arc-shaped split needle modules.
[0022] Furthermore, the two housings are hinged on one side, and a snap-fit structure is provided on the other side of the two housings, which locks the two housings together as one unit.
[0023] The advantage of adopting the above-mentioned further solution is that the two separate shells adopt a snap-fit structure, which simplifies the opening and closing operation of the shells.
[0024] Furthermore, the needle handle module also includes a locking member, one end of which is hinged to the outer wall of a sub-shell, and the other end of which is provided with a limiting part. The limiting part engages in a limiting groove on the outer wall of another sub-shell, so that the middle part of the locking member spans the side of the two sub-shells that are provided with a buckle structure. One end of the locking member with the limiting part extends to form a handle, which covers the limiting groove on the shell and extends in a direction away from the shell.
[0025] The beneficial effect of adopting the above-mentioned further solution is that the locking component ensures the connection stability of the housing. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of a modular fat needle according to the present invention; Figure 2 This is a schematic diagram illustrating the cooperation between the needle body module and the needle handle module in this invention; Figure 3 This is a schematic diagram of the needle tip module in this invention; Figure 4 This is a schematic diagram of the structure when the anti-loosening nut separates from the needle tip body in this invention; Figure 5 This is a schematic diagram of the needle body module in this invention; Figure 6 This is a schematic diagram of the structure of the needle body module when it is disassembled in this invention; Figure 7 This is a schematic diagram of the needle handle module when it is opened in this invention; Figure 8 This is a cross-sectional schematic diagram of the needle handle module in this invention.
[0027] The attached diagram lists the components represented by each number as follows: 1. Needle tip module; 11. Blunt needle tip; 12. Side hole; 13. Second extension; 14. Anti-loosening nut; 15. First extension; 16. Needle thread; 2. Needle body module; 20. Needle path; 21. Arc-shaped split; 22. Enlarged part; 23. Connecting part; 24. Engaging groove; 25. Engaging part; 26. Anti-slip block; 3. Needle handle module; 30. Needle body channel; 31. Split shell; 32. Slot; 33. Buckle structure; 34. Hinge; 35. Locking part; 351. Limiting part; 352. Handle; 36. Limiting groove. Detailed Implementation
[0028] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.
[0029] Example 1 like Figure 1 , 2 As shown, a modular liposuction needle includes a needle handle module 3, a needle body module 2, and a needle tip module 1. The tail end of the needle body module 2 is installed in the needle handle module 3, and the needle tip module 1 is installed at the head end of the needle body module 2. The needle tip module 1 and the interior of the needle body module 2 are connected to form a needle channel 20 (see...). Figure 2 (The middle dashed line area).
[0030] This embodiment uses a modularly designed liposuction needle, which allows for the individual replacement of easily damaged parts, avoiding the need for complete disposal due to damage, thus preventing waste and reducing costs.
[0031] Specifically, such as Figure 1 , 2As shown, the needle handle module 3 is a hollow cylinder. The hollow part of the needle handle module 3 serves as a receiving cavity, which is coaxial with the needle body module 2. In this embodiment, the tail end of the needle body module 2 is detachably installed in the needle handle module 3. The tail end of the needle body module 2 is used to connect with the hose of the external suction device. Preferably, the tail end of the needle body module 2 and the receiving cavity are limited by a mutually cooperating concave-convex structure, which simplifies disassembly and assembly. Of course, in other embodiments, the tail end of the needle body module 2 and the receiving cavity are connected by interference fit, bonding, screws, etc., but the disassembly and assembly are more complicated.
[0032] The needle tip module 1 is detachably installed at the head end of the needle body module 2. The needle body module 2 is a hollow tube structure. The needle tip module 1 and the needle body module 2 are connected to form a needle channel 20 to ensure the aspiration of fat tissue. Preferably, the head ends of the needle tip module 1 and the needle body module 2 are connected by threads, for example, by using an anti-loosening nut structure. This can ensure connection stability and ease of disassembly and assembly. Of course, as other embodiments, the head ends of the needle tip module 1 and the needle body module 2 can be detachably connected by plug-in or other methods.
[0033] Example 2 Based on the above embodiments, the needle body module 2 includes a needle tube body, which is formed by two arc-shaped parts 21 joined together by an interlocking structure. In this embodiment, the needle tube body adopts a split structure, which is convenient to open, easy to clean thoroughly, and allows for the timely detection of any burrs or wear inside, eliminating surgical risks caused by hidden damage to the instrument.
[0034] like Figure 5 , 6 As shown, the needle body includes two semi-circular arc-shaped parts 21. The two arc-shaped parts 21 together form a hollow needle body, which facilitates the flow of adipose tissue through the needle body. The occlusal structure between the two arc-shaped parts 21 includes an occlusal part 25 and an occlusal groove 24. Specifically, the edge of one arc-shaped part 21 extends outward along the circumferential direction to form two rectangular protrusions, each of which serves as an occlusal part 25. The edge of the other arc-shaped part 21 is recessed inward along the circumferential direction to form two rectangular grooves, each of which serves as an occlusal groove 24. The occlusal part 25 is inserted into the occlusal groove 24.
[0035] Furthermore, a biting part 25 and a biting groove 24 can be provided simultaneously on the edge of the same arc-shaped split 21, and multiple biting parts 25 and multiple biting grooves 24 can be provided on the same side edge of each arc-shaped split 21. Preferably, the multiple biting parts 25 and multiple biting grooves 24 on the same side of the arc-shaped split 21 are distributed at intervals along the axial direction of the arc-shaped split 21.
[0036] When cleaning or testing is required, the syringe body can be disassembled into two arc-shaped parts 21, allowing direct flushing of the inside of the syringe body and direct observation of whether the inside of the arc-shaped parts 21 has been thoroughly cleaned.
[0037] Example 3 Based on the above embodiment, an anti-slip block 26 is provided on the outer side of the needle body near the tail end. The anti-slip block 26 engages in the slot 32 within the needle handle module 3. In this embodiment, the anti-slip block 26 cooperates with the slot 32 to prevent relative sliding between the needle body module and the needle handle module, and simplifies the installation of the needle body module and the needle handle module 3.
[0038] Specifically, such as Figure 6 As shown, the needle body is provided with multiple anti-slip blocks 26 near the tail end. In the figure, each anti-slip block 26 is an annular protrusion. Two adjacent protective blocks are distributed at intervals along the axial direction of the needle body. Correspondingly, multiple slots 32 are provided in the receiving cavity of the needle handle module 3. Each anti-slip block 26 is inserted into a slot 32, thereby restricting the movement of the needle body along the axial direction of the needle handle module 3.
[0039] Of course, as other embodiments, the anti-slip block 26 can also be other protruding structures, and the shape of the corresponding slot 32 in the needle handle module 3 needs to match the shape of the anti-slip block 26.
[0040] Example 4 Based on the above embodiments, the tail end of the needle body has an enlarged portion 22, part of which is located outside the needle handle module 3 for connection with the suction device. The head end of the needle body has a connecting portion 23, which is provided with an external thread for connection with the needle tip module 1. The outer diameter of the enlarged portion 22 is larger than the outer diameter of the middle part of the needle body, and the outer diameter of the middle part of the needle body is larger than the outer diameter of the connecting portion 23. The needle channel 20 is a straight channel with equal diameter.
[0041] In this embodiment, the enlarged portion 22 facilitates connection to the pipe of the suction device, and the connecting portion 23 at the head end of the needle body facilitates connection to the needle tip module 1.
[0042] like Figure 5 , 6As shown, the needle body is a stepped hollow tube with a thicker outer diameter at one end and a thinner outer diameter at the other. The tail end of the needle body has a bulge 22 with the largest outer diameter, facilitating positioning and connection to the suction device. A portion of the bulge 22 is located outside the needle handle body 3 for connection to the suction device's tubing, while the other portion is located inside the needle handle body 3 for positioning the needle module 2. The head end of the needle body has a connecting portion 23 with the smallest outer diameter, facilitating connection to the needle tip module 1. Preferably, the outer side of the connecting portion 23... The wall is provided with external threads, so that the connecting part 23 and the needle tip module 1 are connected by an anti-loosening nut, which can ensure the connection stability and also facilitate disassembly and assembly. The needle body located between the expansion part 22 and the connecting part 23 has an interlocking structure in the middle. The outer diameter of the needle body is larger than the outer diameter of the connecting part 23 and smaller than the outer diameter of the expansion part 22. Preferably, the outer diameter of the middle part of the needle body is equal to the outer diameter of the needle tip module 1. Similarly, the inner diameter of the middle part of the needle body is equal to the inner diameter of the needle tip module 1, so that they can be connected to form a straight needle channel 20 with equal diameter.
[0043] Example 5 Based on the above embodiments, the needle tip module 1 includes a needle body, the first end of which is a blunt needle tip 11, and the tail end of which is threadedly connected to the connecting part 23. The middle part of the needle body has multiple side holes 12, which are spirally arranged on the needle body, and each side hole 12 communicates with the needle channel 20. In this embodiment, the multiple side holes 12 can effectively disperse stress, avoid stress concentration, and improve liposuction efficiency.
[0044] Specifically, such as Figure 3 , 4 As shown, the needle body is a hollow rod. The outer diameter of the first end of the needle body gradually decreases to form a blunt needle 11. In this embodiment, the first end of the needle body has a triangular blunt needle 11, and the tail end of the needle body is provided with an internal thread for threading the needle body onto the connecting part 23. The middle part of the needle body is provided with a plurality of side holes 12, each side hole 12 being connected to the central hole area of the needle body. Under the action of the suction device, the adipose tissue enters the hollow area of the needle body through the side hole 12 and then enters the needle tube body. That is, the adipose tissue flows along the needle channel 20.
[0045] In this embodiment, the needle body has three side holes 12 in the middle. The three side holes 12 are spaced apart along the axial direction of the needle body, and adjacent two side holes 12 are staggered to each other, so that all the side holes 12 are arranged in a spiral on the needle body. In this embodiment, the central angle between two adjacent side holes 12 is 120°.
[0046] Example 6 Based on the above embodiments, the needle tip module 1 further includes an anti-loosening nut, which includes a nut body 14 and a first extension 15. The first extension 15 is axially fixed to one end of the nut body 14. Both the nut body 14 and the first extension 15 are provided with internal threads. The tail end of the needle body is provided with internal threads. The tail end face of the needle body extends outward along the axial direction to form a second extension 13. The second extension 13 overlaps the outside of the first extension 15. The external thread of the connecting part 23 is sequentially connected to the internal threads of the nut body 14, the first extension 15, and the tail end of the needle body.
[0047] In this embodiment, the anti-loosening nut 14 can ensure a stable connection between the needle body and the needle tube body. At the same time, the inner wall of the needle tube body connection part is in line with the inner wall of the needle body, so as to avoid damage to fat cells at the joint.
[0048] like Figure 3 , 4 As shown, the outer diameter of the anti-loosening nut 14 is the same as that of the needle body, and the inner diameter of the anti-loosening nut 14 is the same as that of the needle body, so that the anti-loosening nut 14 and the needle body are threaded together on the connecting part 23, which helps to ensure the flatness of the needle tip module 1 inside and out; specifically as follows Figure 4 As shown, the anti-loosening nut 14 includes a nut body with the same outer diameter as the needle body. The nut body has an internal thread, allowing it to form a threaded connection with the connecting part 23. One end of the nut body extends axially to form a first extension 15, which has the same internal thread as the nut body, facilitating a threaded connection between the first extension 15 and the connecting part 23. The thickness of the first extension 15 is less than the thickness of the nut body. Correspondingly, the tail end of the needle body has an internal thread. For ease of description, the internal thread at the tail end of the needle body is referred to as the needle thread 16. See [link to documentation] for details. Figure 3 , 4 The tail end of the needle body extends outward along the axial direction to form a second extension 13. The thickness of the second extension 13 is less than the wall thickness of the needle body, and the sum of the thicknesses of the first extension 15 and the second extension 13 is equal to the wall thickness of the nut body or the needle body. When the anti-loosening nut 14 and the needle body are threaded together at the connecting part 23, the first extension 15 overlaps the outside of the second extension 13, so that the needle body and the needle tube body have the same outer diameter. At the same time, the inner wall of the connecting part 23 of the needle tube body is aligned with the inner wall of the needle body to avoid damage to fat cells at the joint.
[0049] Preferably, the anti-loosening nut 14 can be an eccentric nut.
[0050] Example 7 Based on the above embodiments, the outer walls of the needle body, the needle tube body, and the side walls of the needle channel 20 are all coated with polytetrafluoroethylene coating.
[0051] In this embodiment, the outer walls of the needle body, the needle tube body, and the needle channel 20 are coated with a polytetrafluoroethylene (PTFE) coating, which reduces the coefficient of friction of the outer walls of the needle body and the needle tube body. Typically, when the outer walls of the needle body and the needle tube body are made of stainless steel, their coefficient of friction is 0.15 to 0.40, while when a PTFE coating is used, the coefficient of friction is 0.04 to 0.05. This reduces the difficulty and physical exertion of the doctor's operation, eliminates the possibility of skin burns caused by friction, and the smooth sidewalls of the needle channel 20 reduce mechanical damage to fat cells during aspiration, improve the transplant survival rate, and at the same time, the coating also helps to seal the joint surfaces of the two parts.
[0052] Of course, as other embodiments, other coatings with smooth properties, such as polyvinylpyrrolidone, diamond-like carbon film, etc., can be coated alone or in any combination of two or more.
[0053] Preferably, the thickness of the polytetrafluoroethylene coating is 0.03-0.05 mm.
[0054] As another embodiment, the polytetrafluoroethylene coating can also be applied to existing liposuction needles, that is, the outer side wall and the inner side wall (needle channel) of the one-piece liposuction needle body are both provided with polytetrafluoroethylene coating.
[0055] Example 8 Based on the above embodiments, the needle handle module 3 includes a housing formed by two separate housings 31. The internal space of the housing serves as a receiving cavity, and the side wall of the receiving cavity is provided with a slot 32. Openings are provided at opposite ends of the receiving cavity to form needle channels 30. In this embodiment, the separate housing facilitates the installation of the needle module 2.
[0056] Specifically, such as Figure 7 As shown, two slots 32 are provided in the receiving cavity. Of course, the number of slots 32 can be increased or decreased according to actual needs. Two adjacent slots 32 are spaced apart along the axial direction of the receiving cavity. Openings are provided at opposite ends of the receiving cavity. One of the openings serves as a needle channel 30, and the needle tube body extends out of the housing from the needle channel 30.
[0057] Furthermore, the two separate housings 31 can be closed using a snap-fit structure 33, or they can be closed together using bolts, adhesives, or other methods.
[0058] Example 9 Based on the above embodiment, the two sub-shells 31 are hinged on one side, and a snap-fit structure 33 is provided on the other side of the two sub-shells 31, which locks the two sub-shells 31 together as one unit. In this embodiment, the two sub-shells 31 adopt a snap-fit structure 33, which simplifies the opening and closing operation of the shells.
[0059] like Figure 7 As shown, two hinges 34 are provided on one side of the two sub-shells 31, and two buckle structures 33 are provided on the other side of the two sub-shells 31. In this embodiment, one side edge of one sub-shell 31 is provided with two closed buckles distributed at intervals, and one side edge of the other sub-shell 31 is provided with two closed slots 32 distributed at intervals, which are used to engage with the closed buckles one by one. The hinges 34 and buckle structures 33 are used to cooperate to enable quick opening and closing, and can be operated with one hand, making it convenient to remove the needle module 2 for inspection, cleaning or replacement at any time.
[0060] Example 10 Based on the above embodiment, the needle handle module 3 further includes a locking member 35. One end of the locking member 35 is hinged to the outer wall of a sub-shell 31, and the other end of the locking member 35 is provided with a limiting part 351. The limiting part 351 engages in a limiting groove 36 on the outer wall of another sub-shell 31, so that the middle part of the locking member 35 spans the side of the two sub-shells 31 where the snap-fit structure 33 is provided. One end of the locking member 35 with the limiting part 351 extends to form a handle 352. The handle 352 covers the limiting groove 36 on the shell and extends in a direction away from the shell. In this embodiment, the locking member 35 ensures the connection stability of the shell.
[0061] Specifically, such as Figure 8 As shown, the locking member 35 has an overall arc-shaped cantilever structure, allowing it to fit against the outer wall of the housing. One end of the locking member 35 is hinged to the outer wall of a sub-housing 31, and the other end of the locking member 35 is provided with a limiting part 351. The limiting part 351 faces the housing and protrudes from the surface of the locking member 35. A limiting groove 36 is provided on the outer wall of the housing, allowing the middle part of the locking member 35 to cross the side of the two sub-housing 31s where the snap-fit structure 33 is provided. One end of the locking member 35 with the limiting part 351 extends to form a handle 352. The handle 352 can cover the limiting groove 36 on the housing and extends in a direction away from the housing, giving the handle 352 a certain arc shape.
[0062] When in use, first insert the assembled needle body module 2 into the opened housing in the needle handle module 3. The needle body module 2 is set along the needle body channel 30. Then, close the housing and insert the limiting part 351 of the locking part 35 into the limiting groove 36. Then tighten the needle tip module 1. When the needle body is bent or damaged, only the needle tip module 1 can be replaced. When cleaning or testing is required, open the needle handle module 3 and take out the needle body module 2. Disassemble the needle tube body into two arc-shaped parts 21 and thoroughly rinse and observe the internal needle channel 20 of the needle tube body.
[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0066] In this invention, 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," "over," and "on top" of 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.
[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A modular liposuction needle, characterized in that, It includes a needle handle module (3), a needle body module (2) and a needle tip module (1). The tail end of the needle body module (2) is installed in the needle handle module (3), and the needle tip module (1) is installed at the head end of the needle body module (2). The needle tip module (1) and the needle body module (2) are connected to form a needle channel (20).
2. The modular liposuction needle according to claim 1, characterized in that, The needle module (2) includes a needle tube body, which is formed by two arc-shaped parts (21) joined together by an interlocking structure.
3. The modular liposuction needle according to claim 2, characterized in that, The needle body is provided with an anti-slip block (26) near the tail end, and the anti-slip block (26) is engaged in the slot (32) in the needle handle module (3).
4. The modular liposuction needle according to claim 3, characterized in that, The tail end of the needle tube body has an enlarged portion (22), part of which is located outside the needle handle module (3) for connection with the suction device. The head end of the needle tube body has a connecting portion (23), which is provided with an external thread for connection with the needle tip module (1). The outer diameter of the enlarged portion (22) is larger than the outer diameter of the middle part of the needle tube body. The outer diameter of the middle part of the needle tube body is larger than the outer diameter of the connecting portion (23). The needle channel (20) is a straight channel with equal diameter.
5. The modular liposuction needle according to claim 4, characterized in that, The needle tip module (1) includes a needle body, the first end of which is a blunt needle tip (11), the tail end of which is threaded to the connecting part (23), and the middle part of the needle body is provided with multiple side holes (12), and the multiple side holes (12) are arranged in a spiral on the needle body, and each side hole (12) is connected to the needle channel (20).
6. The modular liposuction needle according to claim 5, characterized in that, The needle tip module (1) also includes an anti-loosening nut, which includes a nut body (14) and a first extension (15). The first extension (15) is fixed axially to one end of the nut body (14). Both the nut body (14) and the first extension (15) are provided with internal threads. The tail end of the needle body is provided with internal threads. The end face of the tail end of the needle body extends outward along the axial direction to form a second extension (13). The second extension (13) overlaps the outside of the first extension (15). The external thread of the connecting part (23) is connected in sequence to the internal threads of the nut body (14), the first extension (15) and the tail end of the needle body.
7. The modular liposuction needle according to claim 6, characterized in that, The inner wall of the needle tip body is aligned with the inner wall of the needle tube connection part (23) to form a needle channel (20) with the same inner diameter. The outer walls of the needle tip body, the needle tube body and the needle channel (20) are all coated with polytetrafluoroethylene coating.
8. The modular liposuction needle according to claim 1, characterized in that, The needle handle module (3) includes a housing formed by two separate housings (31), the internal space of the housing serves as a receiving cavity, the side wall of the receiving cavity is provided with a slot (32), and the opposite ends of the receiving cavity are respectively provided with openings to form needle channels (30).
9. The modular liposuction needle according to claim 1, characterized in that, The two sub-shells (31) are hinged on one side, and a snap-fit structure (33) is provided on the other side of the two sub-shells (31), which locks the two sub-shells (31) together as one unit.
10. A modular liposuction needle according to claim 9, characterized in that, The needle handle module (3) also includes a locking member (35), one end of which is hinged to the outer wall of a sub-shell (31), and the other end of which is provided with a limiting part (351). The limiting part (351) engages in the limiting groove (36) on the outer wall of another sub-shell (31), so that the middle part of the locking member (35) spans the side of the two sub-shells (31) provided with the buckle structure (33). One end of the locking member (35) provided with the limiting part (351) extends to form a handle (352). The handle (352) covers the limiting groove (36) on the shell and extends in a direction away from the shell.