Auxiliary fat transplantation device for scar area

Abstract

The invention relates to the field of medical auxiliary equipment, and discloses an auxiliary fat transplantation device for a scar area, the auxiliary fat transplantation device comprises a syringe, the inner wall of the syringe is slidably connected with a piston, the outer wall of the piston is fixedly connected with a push rod, and the outer wall of the syringe is provided with an adsorption assembly; the adsorption assembly comprises a vacuum cover, the vacuum cover is arranged on the outer wall of the injection barrel, the outer wall of the vacuum cover is fixedly connected with a fixing pipe, the inner wall of the fixing pipe is fixedly connected with a plurality of cross-shaped sealing blocks, the cross-shaped sealing blocks are attached to the outer wall of the injection barrel, and the outer wall of the vacuum cover is fixedly connected with a connecting ring; a first sealing ring is arranged on the lower surface of the connecting ring, and a vacuum adsorption hole is formed in the vacuum cover. By means of the negative pressure adsorption structure, a scar area to be treated is evenly pulled and lifted before operation, fiber bundles in a concave area are preliminarily released, a stable'safe cortex operation space 'is formed, and the entering depth of a needle head is easier to control.

Description

Technical Field

[0001] This invention relates to the field of medical assistive device technology, specifically to an assistive fat grafting device for scar areas. Background Technology

[0002] Fat grafting is currently one of the important methods for improving depressed scars, post-traumatic tissue defects, and decreased skin elasticity, achieving soft tissue reconstruction by supplementing autologous fat. However, scar tissue is often accompanied by fibrosis, insufficient blood supply, and adhesions between the skin and deeper tissues, resulting in poor local tissue compliance and limited expansion space. Under these conditions, fat grafting often places higher demands on the uniformity of the injection environment, the degree of tissue loosening, and the fat survival environment. Therefore, a specialized device is needed to assist in expanding the accommodation space and optimizing the transplantation conditions.

[0003] In existing technologies, adjunctive fat grafting procedures for scar areas typically employ a combination of mechanical release tools and traditional blunt needle injection. During the procedure, the physician first uses a handheld release scalpel, needle-type releaser, or curved blade to sever the fibrous bundles beneath the scar, improving the hardened state of the local tissue. After release, a multi-hole blunt needle or traditional injection needle is used to evenly push the fat into the treated area. Some devices further improve the fat diffusion path through needle angle control and needle tip opening design, allowing the fat to spread better beneath the scar, thus improving the texture and smoothness of the transplanted tissue. Overall, the basic principle is to improve the tissue environment through manual release and zoned injection, thereby facilitating the successful fat grafting process.

[0004] However, due to the inherent density and fibrous adhesion of scar tissue, even after conventional mechanical release, the subcutaneous space for expansion may still be limited. During subsequent fat injection, if the local capacity is insufficient, fat may accumulate locally, hindering nutrient diffusion and creating an unfavorable survival environment. Therefore, improving subcutaneous fat capacity, reducing the risk of fat accumulation, and optimizing fat survival conditions after release remain key challenges for current techniques in fat grafting in scar areas. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an auxiliary fat grafting device for scar areas, which solves the problems in existing technologies where the dense texture and severe fibrous adhesion of scar tissue lead to a lack of effective subcutaneous fat-accommodating space, resulting in fat accumulation and necrosis and low survival rate when fat is forcibly injected.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: an auxiliary fat grafting device for scar areas, comprising an injection cylinder, a piston slidably connected to the inner wall of the injection cylinder, a push rod fixedly connected to the outer wall of the piston, and an adsorption component provided on the outer wall of the injection cylinder;

[0007] The adsorption assembly includes a vacuum hood disposed on the outer wall of the syringe. A fixing tube is fixedly connected to the outer wall of the vacuum hood. Multiple cross-shaped sealing blocks are fixedly connected to the inner wall of the fixing tube and are attached to the outer wall of the syringe. A connecting ring is fixedly connected to the outer wall of the vacuum hood. A first sealing ring is provided on the lower surface of the connecting ring. Vacuum adsorption holes are provided inside the vacuum hood. A rubber ring is fixedly connected to the inner wall of the vacuum hood. A first connecting tube is fixedly connected to the inner wall of the rubber ring. A sealing groove is provided inside the first connecting tube. A second sealing ring is provided on the inner wall of the first connecting tube. A sealing gasket is attached to the upper surface of the second sealing ring. A second connecting tube is fixedly connected to the upper surface of the sealing gasket. A first threaded ring is threadedly connected to the outer wall of the second connecting tube. A pipe is fixedly connected to the upper surface of the second connecting tube. A vacuum pump is fixedly connected to one end of the pipe.

[0008] Preferably, a first connecting post is fixedly connected to the outer wall of the syringe, and a retaining ring is fixedly connected to the outer wall of the first connecting post.

[0009] Preferably, a knob is threadedly connected to the outer wall of the fixing ring, and a limit plate is fixedly connected to the outer wall of the knob.

[0010] Preferably, a first retaining ring is fixedly connected to the outer wall of the fixing ring, and a second connecting post is rotatably connected to the outer wall of the knob.

[0011] Preferably, a third connecting post is slidably connected to the inner wall of the second connecting post, one end of the third connecting post is fixedly connected to the outer wall of the first retaining ring, and scales are engraved on the outer walls of both the second and third connecting posts.

[0012] Preferably, a connecting block is fixedly connected to one end of the syringe, and a fixing column is fixedly connected to one end of the connecting block.

[0013] Preferably, a fourth connecting column is slidably connected to the inner wall of the fixed column, and a needle is fixedly connected to one end of the fourth connecting column.

[0014] Preferably, a second retaining ring is fixedly connected to the outer wall of the fourth connecting post, and a second threaded ring is threadedly connected to the outer wall of the second retaining ring, and the fixed post is threadedly connected to the second threaded ring.

[0015] Preferably, a spring is provided inside the fourth connecting column, with one end of the spring fixedly connected to the inner wall of the fourth connecting column and the other end fixedly connected to a limiting ball.

[0016] Preferably, a limiting hole is formed in the inner wall of the fixed column, and the limiting ball is slidably connected inside the limiting hole formed inside the fixed column.

[0017] This invention provides an auxiliary fat grafting device for scar areas. It has the following beneficial effects:

[0018] 1. This invention forms a multi-stage sealed negative pressure adsorption structure through a vacuum hood, sealing ring, vacuum adsorption hole, first connecting tube, second connecting tube, pipeline, and vacuum pump. This structure can establish a stable and uniform negative pressure environment on the scar surface, gently lifting the depressed tissue and expanding the gap between the skin laxity layer and the fibrous bundle layer, thereby forming a safe and visible injection operation layer. At the same time, the vacuum adsorption structure, together with the fixing tube and cross sealing block, ensures that the injection cylinder remains sealed even after passing through the vacuum hood, effectively preventing the loss of negative pressure and achieving a more precise and safer basic operation for scar treatment.

[0019] 2. This invention, through an adjustable limiting mechanism consisting of a first connecting post, a fixing ring, a knob, a limiting plate, and a scale display structure set on the outer wall of the syringe, can precisely limit the maximum extension length of the needle, making the needle insertion depth controllable and readable. This ensures that the needle is always injected within the "safe skin layer" after being pulled up by negative pressure, reducing the risk of excessive puncture or accidental entry into non-target layers due to differences in operator experience. This control method transforms blind puncture into a quantifiable, standardized, and controllable operation, significantly improving safety and consistency.

[0020] 3. A quick-locking assembly is formed by a second threaded ring, a second retaining ring, a fixing post, a limiting hole, a limiting ball, and a spring, enabling automatic positioning and rapid disassembly / removal of the needle. When changing the needle, simply loosen the threaded ring and pull it out; during installation, inserting it will automatically spring into the positioning hole to lock it in place, and tightening the threaded ring will secure it firmly. This structure allows for quick switching between different needle sizes, preventing operational interruptions due to blockage or wear, while maintaining sterility throughout the needle replacement process, reducing the risk of cross-contamination, minimizing instrument wear, and significantly improving the overall continuity and efficiency of scar fat grafting surgery. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a schematic diagram of the vacuum chamber of the present invention;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the injection cartridge of the present invention;

[0025] Figure 5 This is a schematic diagram of the limiting plate of the present invention;

[0026] Figure 6 This is a schematic diagram of the needle of the present invention;

[0027] Figure 7 This is a schematic diagram of the second threaded ring of the present invention;

[0028] Figure 8 This is a schematic diagram of the limiting ball of the present invention.

[0029] The components are as follows: 1. Vacuum hood; 2. Connecting ring; 3. First sealing ring; 4. Rubber ring; 5. First connecting tube; 6. First threaded ring; 7. Second connecting tube; 8. Pipe; 9. Vacuum pump; 10. Fixed tube; 11. Injection cylinder; 12. Sealing groove; 13. Second sealing ring; 14. Sealing gasket; 15. Cross sealing block; 16. Push rod; 17. Knob; 18. Limiting plate; 19. Needle; 20. First connecting post; 21. Fixed ring; 22. First retaining ring; 23. Second connecting post; 24. Third connecting post; 25. Scale; 26. Piston; 27. Connecting block; 28. Second threaded ring; 29. ​​Fixed post; 30. Limiting hole; 31. Second retaining ring; 32. Limiting ball; 33. Spring; 34. Fourth connecting post; 35. Vacuum adsorption hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example:

[0032] Please see the appendix Figure 1 -Appendix Figure 8 This invention provides an auxiliary fat grafting device for scar areas, including an injection cylinder 11. A piston 26 is slidably connected to the inner wall of the injection cylinder 11, and a push rod 16 is connected to the outer wall of the piston 26. The piston 26 moves forward under the push rod 16 to squeeze the filler in the injection cylinder 11 and deliver it to the needle 19. The push rod 16 is fixedly connected to the outer wall of the piston 26, and an adsorption component is provided on the outer wall of the injection cylinder 11.

[0033] The adsorption assembly includes a vacuum hood 1. The bottom edge of the vacuum hood 1 is attached to the skin via a connecting ring 2 and a first sealing ring 3. Together with the internal first connecting tube 5 and vacuum adsorption holes 35, it forms a closed cavity. This cavity is used to create negative pressure under the suction of a vacuum pump 9, lifting and stabilizing the adsorption of the scar area. The vacuum hood 1 is located on the outer wall of the syringe 11. A fixing tube 10 is fixedly connected to the outer wall of the vacuum hood 1. Multiple cross-shaped sealing blocks 15 are fixedly connected to the inner wall of the fixing tube 10. The inner surfaces of the cross-shaped sealing blocks 15 are circumferentially attached to the outer wall of the syringe 11, providing guidance for the syringe 11 and maintaining airtightness when the syringe 11 enters the vacuum hood 1. The cross-shaped sealing blocks 15 are attached to the outer wall of the syringe 11. A connecting ring 2 is fixedly connected to the outer wall of the vacuum hood 1. A first sealing ring 3 is provided on the lower surface of the connecting ring 2, directly contacting the skin to ensure a sealed space is formed below the vacuum hood 1, preventing air leakage and improving the stability of negative pressure adsorption. Vacuum adsorption holes 35 are provided inside the vacuum hood 1. A rubber ring 4 is fixedly connected to the inner wall of the vacuum chamber 1. The inner wall of the rubber ring 4 is in contact with the first connecting pipe 5 to buffer the assembly tolerance of the first connecting pipe 5 and enhance the sealing performance between the first connecting pipe 5 and the vacuum chamber 1. The first connecting pipe 5 is fixedly connected to the inner wall of the rubber ring 4. A sealing groove 12 is opened inside the first connecting pipe 5. A second sealing ring 13 is provided on the inner wall of the first connecting pipe 5. A sealing gasket 14 is attached to the upper surface of the second sealing ring 13. The sealing gasket 14 is used to enhance the sealing effect between the first connecting pipe 5 and the second connecting pipe 7. The second connecting pipe 7 is fixedly connected to the upper surface of the sealing gasket 14. A first threaded ring 6 is threadedly connected to the outer wall of the second connecting pipe 7 and the first connecting pipe 5. The first threaded ring 6 locks the second connecting pipe 7 and the first connecting pipe 5 by tightening, so that the second connecting pipe 7 and the first connecting pipe 5 fit tightly and prevent air leakage, thereby maintaining the stability of the negative pressure system. A pipe 8 is fixedly connected to the upper surface of the second connecting pipe 7. A vacuum pump 9 is fixedly connected to one end of the pipe 8.

[0034] Specifically, the vacuum hood 1 forms a closed environment on the skin surface through the connecting ring 2 and the first sealing ring 3. The vacuum suction hole 35 inside generates negative pressure under the suction of the vacuum pump 9, which is used to lift the depressed scar. The first connecting tube 5, the second connecting tube 7, the rubber ring 4, the sealing groove 12, the second sealing ring 13, and the sealing gasket 14 together improve the sealing stability of the negative pressure system. The first threaded ring 6 and the second threaded ring 28 ensure that each connection part is stable and reliable. The fixing tube 10 and the cross sealing block 15 provide a guide and airtight channel for the syringe 11, so that the syringe 11 can still be smoothly inserted into the vacuum hood under negative pressure. 1. Inside the syringe 11, the piston 26 moves forward under the drive of the push rod 16 and the knob 17, precisely injecting fat from the needle 19 into the tissue layer below the scar. The scale 25 is used to control the injection volume. The limiting plate 18, the fixing ring 21, the first retaining ring 22, the second retaining ring 31, the limiting hole 30, the limiting ball 32 and the spring 33 provide stable limiting and positioning functions. The first connecting post 20, the second connecting post 23, the third connecting post 24 and the fourth connecting post 34 are used for internal structural support, so that the device can achieve stable, controllable and precise fat injection while adsorbing and lifting the scar tissue.

[0035] A first connecting post 20 is fixedly connected to the outer wall of the syringe 11. A retaining ring 21 is fixedly connected to the outer wall of the first connecting post 20. The retaining ring 21 is used to install the limit adjustment mechanism and provides a rotating base for the knob 17. The knob 17 is threadedly connected to the outer wall of the retaining ring 21. A limit plate 18 is fixedly connected to the outer wall of the knob 17. The surface of the limit plate 18 abuts against the fixed tube 10 and is used to change the relative length between the syringe 11 and the fixed tube 10 when the knob 17 is rotated, thereby limiting the forward movement of the syringe 11 and the needle 19 and controlling the maximum forward movement of the needle 19. The needle 19 is extended in length. A first retaining ring 22 is fixedly connected to the outer wall of the fixed ring 21. A second connecting post 23 is rotatably connected to the outer wall of the knob 17. A third connecting post 24 is slidably connected to the inner wall of the second connecting post 23. The third connecting post 24 is used to display the extension amount of the needle 19 in real time, providing the operator with intuitive depth information. One end of the third connecting post 24 is fixedly connected to the outer wall of the first retaining ring 22. Both the outer walls of the second connecting post 23 and the third connecting post 24 are engraved with scales 25. The extension length of the needle 19 can be read by external observation, which is convenient for controlling the needle insertion depth.

[0036] Specifically, the fixing ring 21 serves as the mounting base for the limiting system. When the knob 17 rotates on its outer wall, it drives the limiting plate 18 to change its contact position on the surface of the fixing tube 10, thereby adjusting the maximum forward movement of the injection cylinder 11 and the needle 19, achieving precise limitation on the extension depth of the needle 19. The first connecting post 20, the second connecting post 23, and the third connecting post 24 constitute a retractable depth indicator assembly. The third connecting post 24 changes synchronously with the movement of the injection cylinder 11. Its outer wall scale 25 and the scale on the second connecting post 23 together form a visual depth display, allowing the operator to judge the actual extension amount of the needle 19 in real time. During fat injection, the piston 26 moves forward under the push of the push rod 16, injecting the fat in the injection cylinder 11 evenly into the target layer after being lifted by negative pressure through the needle 19. The limiting plate 18 and the scale 25 ensure that the needle 19 is always in the "safe skin layer," effectively avoiding the risks caused by excessive puncture, making the injection process more controllable, visual, and standardized, and improving the safety and accuracy of scar filling.

[0037] A connecting block 27 is fixedly connected to one end of the syringe 11, and a fixing post 29 is fixedly connected to one end of the connecting block 27. A fourth connecting post 34 is slidably connected inside the fixing post 29, and its outer wall is threadedly engaged with a second threaded ring 28. This forms the housing part of the quick-locking structure for the needle 19. The fourth connecting post 34 is slidably connected to the inner wall of the fixing post 29. The needle 19 is fixedly connected to one end of the fourth connecting post 34, and a second retaining ring 31 is fixedly connected to the outer wall of the fourth connecting post 34. The second retaining ring 31 is used to withstand the clamping force of the second threaded ring 28, making the quick-locking structure more stable. The second retaining ring 31 is threadedly engaged with the outer wall of the second threaded ring 28. The fourth connecting post 34 is connected to a second threaded ring 28, and the fixing post 29 is threadedly connected to the second threaded ring 28. A spring 33 is provided inside the fourth connecting post 34. The spring 33 is used to provide the restoring force for the limiting ball 32 to push outward, so that the limiting structure can be automatically locked. One end of the spring 33 is fixedly connected to the inner wall of the fourth connecting post 34, and the other end is fixedly connected to the limiting ball 32. A limiting hole 30 is opened in the inner wall of the fixing post 29. The limiting hole 30 allows the limiting ball 32 to be inserted into it, which is used to realize the automatic positioning and quick locking of the needle 19. The limiting ball 32 is slidably connected inside the limiting hole 30 opened inside the fixing post 29.

[0038] Specifically, the fixing post 29 serves as the main structure for mounting the needle 19, internally accommodating a slidable fourth connecting post 34. The needle 19 is fixed at the front end of the fourth connecting post 34, and a spring 33 and a limiting ball 32 are provided at the rear end. The spring 33 provides an outward pushing force to the limiting ball 32, causing it to automatically spring into the limiting hole 30 on the fixing post 29 and complete the positioning of the needle 19. The second threaded ring 28 and the second retaining ring 31 form an end clamping and fixing structure. Tightening enhances locking stability, while loosening releases the lock and allows for quick removal of the needle 19. (This is for replacing the needle 19.) At 9 o'clock, after the new needle 19 is inserted into the fixing post 29, the limiting ball 32 retracts under compression. After being inserted into place, the limiting ball 32 automatically springs into the limiting hole 30 to achieve quick locking. Then, tightening the second threaded ring 28 completes the fixation. This structure supports quick switching between different sizes of needle 19, avoids interruptions caused by fat blockage, improves the continuity of the surgical process, maintains the sterility of the needle 19 installation process, reduces the risk of contamination, and reduces instrument wear caused by needle 19 wear or blockage, thereby significantly improving efficiency and safety in scar fat transplantation.

[0039] Working principle: When the auxiliary fat grafting device for scar areas is put into use, the vacuum hood 1 is first placed over the surface of the scar skin to be treated. The lower side of the vacuum hood 1 is tightly fitted to the skin through the first sealing ring 3. The first sealing ring 3 has a vacuum adsorption hole 35 for forming negative pressure adsorption. The vacuum adsorption hole 35 is connected to the second connecting pipe 7 through the first connecting pipe 5. The second connecting pipe 7 is connected to the external pipe 8, and the other end of the pipe 8 is connected to the vacuum pump 9. To improve the sealing of the entire negative pressure system, a sealing groove 12 is formed inside the first connecting pipe 5. A second sealing ring 13 is set in the sealing groove 12. At the same time, a sealing gasket 14 is further provided between the second connecting pipe 7 and the first sealing ring 3 to form a multi-level sealing structure. To ensure the fixation and airtightness between the connecting pipes, a first threaded ring 6 is threaded between the second connecting pipe 7 and the first connecting pipe 5. By tightening the first thread... Ring 6 allows the two tubes to fit tightly together, reducing the risk of air leakage during negative pressure transmission. When the vacuum pump 9 is started, the air inside the vacuum cover 1 is sequentially drawn out through the first connecting tube 5, the second connecting tube 7, and the pipe 8, so that the vacuum adsorption hole 35 inside the vacuum cover 1 forms a negative pressure zone, achieving stable adsorption and lifting of the scar area. This process can gently lift the depressed scar tissue, creating a gap between the skin laxity layer and the fibrous bundle layer, providing a safer and more precise operating layer for subsequent fat injection. Subsequently, the fixing tube 10 fixedly connected to the outer wall of the vacuum cover 1 begins to function. The fixing tube 10 is equipped with a cross-shaped sealing block 15 for maintaining airtightness and guiding function. The injection cylinder 11 is inserted into the fixing tube 10. The cross-shaped sealing block 15 circumferentially covers the outer wall of the injection cylinder 11, ensuring that the injection mechanism does not disrupt the negative pressure environment when passing through the vacuum cover 1, while also providing stable guidance for the injection cylinder 11.

[0040] During fat grafting, the operator pushes the plunger 16, causing the internal piston 26 to move forward, thereby squeezing the pre-loaded fat filler inside the injection cylinder 11 and injecting it through the needle 19 into the depressed area of ​​the lifted scar tissue, achieving uniform implantation. To avoid excessive puncture or entry into non-target layers, a fixing ring 21 is fixedly connected to the outer wall of the injection cylinder 11 via a first connecting post 20. A rotatable knob 17 is provided on the outer wall of the fixing ring 21. The knob 17 drives the outer limiting plate 18 to rotate synchronously, and the limiting plate 18 fits against the fixing tube 1. The outer wall of the third connecting column 24 allows for precise control of the needle depth by adjusting its position, thus limiting the maximum extension of the needle 19. Combined with the scale 25 on the outer wall of the third connecting column 24, the operator can visually judge the depth of the needle 19 into the skin, ensuring that the needle 19 always operates within the "safe skin layer" lifted by negative pressure. This structure effectively reduces the risk of over-puncture due to experience differences in traditional operations, transforming high-risk blind operations into a controllable and standardized safe operating procedure.

[0041] During use, the needle 19 may need to be replaced due to grease blockage, wear and dulling, or the need to switch to a different specification. To achieve quick, safe, and sterile disassembly and assembly, a quick-locking assembly consisting of a second threaded ring 28, a first retaining ring 22, a fixing post 29, a limiting hole 30, a limiting ball 32, and a spring 33 is provided at the front end of the needle 19 and the syringe 11. When it is necessary to disassemble the needle 19, the operator only needs to loosen the second threaded ring 28 to release its fixation to the first retaining ring 22, and then pull out the needle 19 horizontally. During the pulling process, the tail of the needle 19 will squeeze the limiting ball 32, causing the spring 33 to retract, allowing the needle 19 to smoothly disengage from the fixing post 29. Internal structure: When installing a new needle 19, insert the needle 19 into the inner cavity of the fixing post 29. The limiting ball 32 compresses the spring 33 under the pressure of the inner wall of the fixing post 29. When the needle 19 reaches the preset position, the limiting ball 32 is pushed into the limiting hole 30 by the spring 33 to achieve automatic locking. Then, tighten the second threaded ring 28 to complete the secondary fixation of the needle 19. This quick-disassembly and assembly structure not only supports flexible switching between different specifications of needles 19 according to surgical needs, but also keeps the needles in a sterile state to avoid cross-contamination. At the same time, it effectively reduces the interruption of surgery due to needle 19 blockage, reduces the instrument cost of a single surgery, and improves surgical efficiency.

[0042] Through the coordinated operation of the aforementioned components, this device can achieve stable operation in multiple stages such as negative pressure traction, precise puncture, controllable injection, and rapid replacement, significantly improving the safety, convenience, and accuracy of scar filling.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary fat grafting device for scar areas, comprising an injection cylinder (11), characterized in that, A piston (26) is slidably connected to the inner wall of the injection cylinder (11), a push rod (16) is fixedly connected to the outer wall of the piston (26), and an adsorption assembly is provided on the outer wall of the injection cylinder (11). The adsorption assembly includes a vacuum hood (1), which is disposed on the outer wall of the syringe (11). A fixing tube (10) is fixedly connected to the outer wall of the vacuum hood (1). A plurality of cross-shaped sealing blocks (15) are fixedly connected to the inner wall of the fixing tube (10). The cross-shaped sealing blocks (15) are fitted against the outer wall of the syringe (11). A connecting ring (2) is fixedly connected to the outer wall of the vacuum hood (1). A first sealing ring (3) is provided on the lower surface of the connecting ring (2). Vacuum adsorption holes (35) are opened inside the vacuum hood (1). A rubber ring (4) is fixedly connected to the inner wall of the vacuum hood (1). A first connecting pipe (5) is fixedly connected to the inner wall of the rubber ring (4). A sealing groove (12) is opened inside the first connecting pipe (5). A second sealing ring (13) is provided on the inner wall of the first connecting pipe (5). A sealing gasket (14) is attached to the upper surface of the second sealing ring (13). A second connecting pipe (7) is fixedly connected to the upper surface of the sealing gasket (14). A first threaded ring (6) is threadedly connected to the outer wall of the second connecting pipe (5). A pipe (8) is fixedly connected to the upper surface of the second connecting pipe (7). A vacuum pump (9) is fixedly connected to one end of the pipe (8).

2. The auxiliary fat grafting device for scar areas according to claim 1, characterized in that, The outer wall of the syringe (11) is fixedly connected to a first connecting post (20), and the outer wall of the first connecting post (20) is fixedly connected to a fixing ring (21).

3. The auxiliary fat grafting device for scar areas according to claim 2, characterized in that, The outer wall of the fixing ring (21) is threaded with a knob (17), and the outer wall of the knob (17) is fixedly connected with a limiting plate (18).

4. The auxiliary fat grafting device for scar areas according to claim 3, characterized in that, The outer wall of the fixing ring (21) is fixedly connected to a first retaining ring (22), and the outer wall of the knob (17) is rotatably connected to a second connecting post (23).

5. The auxiliary fat grafting device for scar areas according to claim 4, characterized in that, The inner wall of the second connecting post (23) is slidably connected to a third connecting post (24). One end of the third connecting post (24) is fixedly connected to the outer wall of the first retaining ring (22). Both the outer walls of the second connecting post (23) and the third connecting post (24) are engraved with scales (25).

6. The auxiliary fat grafting device for scar areas according to claim 2, characterized in that, One end of the syringe (11) is fixedly connected to a connecting block (27), and one end of the connecting block (27) is fixedly connected to a fixing post (29).

7. The auxiliary fat grafting device for scar areas according to claim 6, characterized in that, The inner wall of the fixed column (29) is slidably connected to a fourth connecting column (34), and a needle (19) is fixedly connected to one end of the fourth connecting column (34).

8. The auxiliary fat grafting device for scar areas according to claim 7, characterized in that, The outer wall of the fourth connecting post (34) is fixedly connected to a second retaining ring (31), and the outer wall of the second retaining ring (31) is threadedly connected to a second threaded ring (28). The fixed post (29) is threadedly connected to the second threaded ring (28).

9. The auxiliary fat grafting device for scar areas according to claim 8, characterized in that, A spring (33) is provided inside the fourth connecting post (34). One end of the spring (33) is fixedly connected to the inner wall of the fourth connecting post (34), and the other end is fixedly connected to a limiting ball (32).

10. The auxiliary fat grafting device for scar areas according to claim 9, characterized in that, The inner wall of the fixed column (29) is provided with a limiting hole (30), and the limiting ball (32) is slidably connected inside the limiting hole (30) provided inside the fixed column (29).

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