Skin grafting device

Abstract

The invention provides a skin grafting device which comprises a skin taking structure and a driving part, the skin taking structure comprises a plurality of skin taking parts, each skin taking part comprises a tool bit and a first connecting part, the first connecting parts extend in the first direction, and the tool bits are connected to the ends, in the first direction, of the first connecting parts; the other end, in the first direction, of the first connecting part is rotatably connected to the driving part, the multiple skin taking parts are arranged at intervals in the direction perpendicular to the first direction, and the driving part is used for driving the skin taking parts to rotate around the axis parallel to the first direction. The multiple skin taking parts take skin at the same time, the skin taking efficiency is remarkably improved, in the rotation process of the skin taking parts, the tool bit extracts skin tissue, tiny autologous skin extracted by the skin taking parts carries hair follicles, sweat glands, melanocytes and the like, and the multiple skin taking parts carry the autologous skin to be implanted into allogeneic skin or artificial skin at the same time, so that a complete skin function reconstruction basis is provided, and the skin taking efficiency is improved. Therefore, the skin transplantation effect and the skin transplantation efficiency are improved, and meanwhile, a smaller wound is generated on a skin tissue donor region.

Description

Technical Field

[0001] This application relates to the field of skin transplantation equipment technology, and more particularly to a skin transplantation device. Background Technology

[0002] Repairing skin tissue defects is a major challenge in clinical medicine, especially in cases of large-area burns, trauma, or chronic ulcers. Traditional treatments, such as allogeneic skin grafting and artificial skin grafting, have poor effects on achieving skin function. Therefore, there is an urgent need for a transplantation device that can improve the effectiveness of skin transplantation. Summary of the Invention

[0003] This application provides a skin grafting device aimed at improving the skin grafting effect.

[0004] An embodiment of the first aspect of this application provides a skin grafting device, including: a skin harvesting structure and a driving unit. The skin harvesting structure includes a plurality of skin harvesting parts, each skin harvesting part including a blade and a first connecting part. The first connecting part extends along a first direction, and the blade is connected to one end of the first connecting part along the first direction. The other end of the first connecting part along the first direction is rotatably connected to the driving unit. The plurality of skin harvesting parts are spaced apart along a direction perpendicular to the first direction. The driving unit is used to drive the skin harvesting parts to rotate about an axis parallel to the first direction.

[0005] According to the embodiments of this application, the driving unit includes a first body part, a first driving motor and a plurality of first mounting seats. The plurality of first mounting seats are connected to the first body part and are spaced apart along a direction perpendicular to the first direction. The first driving motor is used to drive the first mounting seats to rotate about an axis parallel to the first direction. The other end of the first connecting part of the plurality of skin-picking parts is connected to the first mounting seat along the first direction.

[0006] According to the embodiments of this application, a plurality of first mounting seats are arranged in an array, each first mounting seat is movably disposed along a second direction and / or a third direction, and / or the center distance between the blades of two adjacent skin-taking parts is 7 mm to 15 mm; the second direction and the third direction intersect, and the second direction and the third direction are perpendicular to the first direction.

[0007] According to an embodiment of this application, the blade includes a blade, and the blade has a sampling port on the side opposite to the first connecting portion along a first direction. The sampling port is used to contain skin.

[0008] According to an embodiment of this application, the blade has a cavity that is connected to a sampling port. A barb structure and a piston are provided in the cavity. The barb structure has a gap extending in a first direction. The aperture of the gap gradually decreases in the direction away from the sampling port. The piston is located on the side of the barb structure away from the sampling port and is movable along the first direction through the gap.

[0009] According to embodiments of this application, the blade is cylindrical and has a diameter of 200 micrometers to 1200 micrometers.

[0010] According to the embodiments of this application, the skin grafting device further includes a pit-making structure, which includes a plurality of pit-making portions. Each pit-making portion includes a second connecting portion, which extends along a first direction. One end of the second connecting portion along the first direction is provided with a pointed tip. The distance between two adjacent pit-making portions is equal to the distance between two adjacent skin-harvesting portions, which is perpendicular to the first direction.

[0011] According to the embodiments of this application, along the direction away from the second connecting portion, the cross-sectional area of ​​the tip gradually decreases along the direction perpendicular to the first direction; or, the end of the tip away from the second connecting portion is cylindrical, and a pitting opening is provided on the side of the tip away from the second connecting portion along the first direction, the pitting opening being used to accommodate skin.

[0012] According to the embodiments of this application, the pit-making structure further includes an installation part, the installation part is provided with a plurality of second mounting seats, the plurality of second mounting seats are spaced apart along a direction perpendicular to the first direction, and the other end of the second connecting part of the plurality of pit-making parts is connected to the second mounting seats along the first direction.

[0013] According to an embodiment of this application, the mounting part includes a second drive motor, which is used to drive the second mounting base to rotate about an axis parallel to the first direction.

[0014] According to the embodiments of this application, a plurality of second mounting bases are arranged in an array, and each second mounting base is movably disposed along a second direction and / or a third direction, the second direction and the third direction intersect, and the second direction and the third direction are perpendicular to the first direction.

[0015] In the embodiments of this application, the skin harvesting structure includes multiple harvesting sections. These sections harvest skin simultaneously, significantly improving harvesting efficiency, especially suitable for large-area skin repair needs, and reducing surgical time. The multiple harvesting sections are spaced apart along a direction perpendicular to a first direction, each harvesting from different locations on the skin, thereby reducing damage to the skin. Each harvesting section includes a blade and a first connecting portion. The blade is connected to one end of the first connecting portion along the first direction, and the other end of the first connecting portion along the first direction is rotatably connected to a driving portion. The driving portion drives the first connecting portion to rotate, thereby rotating the blade. During the rotation of the harvesting section, the blade extracts skin tissue. The driving portion drives each harvesting section to rotate synchronously, improving the consistency of skin harvesting from each section. The tiny autologous skin cells extracted from the harvesting sections carry hair follicles, sweat glands, and melanocytes, etc. Multiple harvesting sections carrying autologous skin are simultaneously implanted into allogeneic or artificial skin to provide a complete foundation for skin function reconstruction, thereby improving the skin transplantation effect and efficiency. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0017] Figure 1 This is a schematic diagram of the structure of a skin transplantation device provided in an embodiment of this application; Figure 2 This is a schematic diagram of another skin grafting device provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of another skin transplantation device provided in the embodiments of this application; Figure 4 This is a partial structural schematic diagram of a skin transplantation device provided in an embodiment of this application; Figure 5 This is a partial structural schematic diagram of another skin grafting device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of another skin transplantation device provided in the embodiments of this application; Figure 7 This is a schematic diagram of the pit-making structure of a skin grafting device provided in an embodiment of this application; Figure 8 This is a schematic diagram of the pit-creating structure of another skin grafting device provided in this application embodiment; Figure 9 This is a partial structural diagram of the pit-making structure of a skin grafting device provided in an embodiment of this application; Figure 10 This is a schematic diagram of the pit-making structure of another skin grafting device provided in the embodiments of this application; Figure 11 This is a schematic diagram of the pit-making structure of another skin grafting device provided in the embodiments of this application.

[0018] Explanation of reference numerals in the attached drawings: 10, skin-taking structure; 20, pit-making structure; 100, skin-taking part; 110, blade; 111, blade; 112, sampling port; 113, protective layer; 114, cavity; 115, barb structure; 115a, first barb; 115b, second barb; 115c, gap; 117, piston; 120, first connecting part; 200, driving part; 210, first drive motor; 211, first transmission component; 220, first mounting base; 230, first body part; 240, driving device; 300, pit-making part; 310, tip; 311, pit-making opening; 320, second connecting part; 330, mounting part; 331, second mounting base; 332, second drive motor; 333, second transmission component; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0019] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0020] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Skin defect repair is a significant challenge in clinical medicine, especially in cases of severe burns, trauma, or chronic ulcers. Extensive skin loss not only affects a patient's appearance and function but can also lead to serious complications such as infection and fluid loss. Currently, commonly used clinical methods for skin repair include autologous skin grafting, allogeneic skin grafting, and artificial skin grafting; however, all of these techniques have significant limitations.

[0023] While autologous skin grafting offers the best biocompatibility and regenerative effects, the availability of donor sites is limited, especially for patients with extensive burns where there is a severe shortage of healthy skin for transplantation. Furthermore, the skin harvesting process causes secondary trauma to the donor site, increasing patient suffering and the risk of infection.

[0024] Allogeneic skin grafts are derived from donated human skin, but their sources are limited, and hair follicles, sweat glands, and melanocytes are usually inactivated or removed during the production process, resulting in transplanted skin lacking accessory structures and original skin color, and with incomplete function.

[0025] Artificial skin grafts are mostly made of animal tissue or synthetic materials, which also cannot preserve complex structures such as hair follicles and sweat glands, and there are problems such as immune rejection or mismatch in degradation rate, resulting in unsatisfactory long-term effects.

[0026] Therefore, this application proposes a skin transplantation device that extracts autologous skin tissue and precisely implants it into the recipient area (allogeneic skin or artificial skin) so that the allogeneic skin or artificial skin can achieve structural and functional regeneration that is closer to natural skin.

[0027] like Figure 1 As shown in the embodiment of this application, a skin grafting device is proposed, including: a skin harvesting structure 10 and a driving unit 200. The skin harvesting structure 10 includes a plurality of skin harvesting parts 100. Each skin harvesting part 100 includes a blade 110 and a first connecting part 120. The first connecting part 120 extends along a first direction X. The blade 110 is connected to one end of the first connecting part 120 along the first direction X. The other end of the first connecting part 120 along the first direction X is rotatably connected to the driving unit 200. The plurality of skin harvesting parts 100 are arranged at intervals perpendicular to the first direction X. The driving unit 200 is used to drive the skin harvesting parts 100 to rotate about an axis parallel to the first direction X.

[0028] In this embodiment, the skin harvesting structure 10 includes multiple harvesting sections 100. These multiple harvesting sections 100 harvest skin simultaneously, significantly improving harvesting efficiency, especially suitable for large-area skin repair needs, and reducing surgical time. The multiple harvesting sections 100 are spaced apart along a direction perpendicular to the first direction X, and each section 100 harvests skin from different locations on the skin, thereby reducing damage to the skin caused by the skin harvesting structure 10. Each harvesting section 100 includes a blade 110 and a first connecting section 120. The blade 110 is connected to one end of the first connecting section 120 along the first direction X, and the other end of the first connecting section 120 along the first direction X is rotatably connected to a driving section 200. The driving section 200 drives the first connecting section 120 to rotate, thereby driving the blade 110 to rotate. During the rotation of the harvesting section 100, the blade 110 extracts skin tissue. The driving section 200 drives each harvesting section 100 to rotate synchronously, improving the consistency of skin harvesting from each harvesting section 100. The skin harvester 100 is used to extract micro-autologous skin, which carries hair follicles, sweat glands and melanocytes. Multiple skin harvesters 100 carrying autologous skin are simultaneously implanted into the recipient area (allogeneic skin or artificial skin) to provide a complete foundation for skin function reconstruction, thereby improving the skin transplant effect and efficiency.

[0029] like Figure 1As shown, in some optional embodiments, the drive unit 200 includes a first body part 230, a first drive motor 210, and a plurality of first mounting seats 220. The plurality of first mounting seats 220 are connected to the first body part 230 and are spaced apart along a direction perpendicular to the first direction X. The first drive motor 210 is used to drive the first mounting seats 220 to rotate about an axis parallel to the first direction X. The first connecting part 120 of the plurality of skin-picking parts 100 is connected to the first mounting seat 220 at the other end along the first direction X.

[0030] In these optional embodiments, the first connecting portions 120 of the plurality of skin-harvesting parts 100 are connected at their other ends along the first direction X to a first mounting base 220, and the cutting head 110 is located at one end of the first connecting portion 120 opposite to the first mounting base 220. The plurality of first mounting bases 220 are spaced apart perpendicular to the first direction X, and are used to fix the position of the skin-harvesting parts 100 so that the plurality of skin-harvesting parts 100 are spaced apart perpendicular to the first direction X. A first drive motor 210 located in the first body portion 230 drives the first mounting base 220 to rotate about an axis parallel to the first direction X, so that the skin-harvesting parts 100 rotate about an axis parallel to the first direction X to harvest skin. The rotation of the first mounting base 220 drives the first connecting portion 120 and the cutting head 110 located on the first connecting portion 120 to rotate synchronously.

[0031] Optional, such as Figure 1 As shown, the drive unit 200 includes multiple first drive motors 210, each connected to a first mounting base 220. The first drive motors 210 and first mounting bases 220 are connected in a one-to-one correspondence. The first connecting part 120 is rigidly connected to the first mounting base 220. When the first drive motor 210 rotates, it directly drives the skin harvesting unit 100 to rotate. This design is compact and provides efficient power transmission, reducing energy loss. Each skin harvesting unit 100 is driven by its respective first drive motor 210, allowing independent adjustment of speed, direction, and start / stop time. This enables differentiated skin harvesting at different sites, such as parameter optimization for dense hair follicle areas versus ordinary skin areas, improving harvesting accuracy and adaptability. During the procedure, the torque or speed of a specific first drive motor 210 can be adjusted in real time based on differences in skin thickness and harvesting location to optimize the harvesting effect. Furthermore, a single motor failure only affects the corresponding skin harvesting unit 100; the remaining first drive motors 210 can still operate normally, improving the reliability of the skin grafting device and enhancing surgical safety.

[0032] Optional, such as Figure 2As shown, multiple first mounting bases 220 are connected to the same first drive motor 210 via a first transmission component 211. The first drive motor 210 simultaneously drives the multiple first mounting bases 220 to rotate. The first transmission component 211 can be a gear set, etc. A single first drive motor 210 drives multiple first mounting bases 220 to rotate synchronously, improving the consistency of the movement of the blades 110 of the multiple skin harvesting sections 100, reducing deviations in skin harvesting depth or angle caused by asynchronous operation, and improving the uniformity of the surgery. Connecting multiple first mounting bases 220 to the same first drive motor 210 via the first transmission component 211 helps reduce hardware costs and energy consumption, while simplifying the complexity of the control system and making it easier to maintain and calibrate. The centralized drive of a single motor eliminates the need to reserve installation space for the first drive motor 210 for each skin harvesting section 100, making the overall structure of the device more compact and facilitating flexible operation in narrow surgical areas.

[0033] like Figure 3 As shown, in some optional embodiments, a plurality of first mounting bases 220 are arranged in an array, and each first mounting base 220 is movably disposed along a second direction Y and / or a third direction Z, the second direction Y and the third direction Z intersect, and the second direction Y and the third direction Z are perpendicular to the first direction X.

[0034] In these optional embodiments, a plurality of first mounting bases 220 are arranged in an array, and a plurality of skin harvesting portions 100 are arranged in an array. The first mounting bases 220 are movable along a second direction Y, so that the skin harvesting portions 100 are movable along the second direction Y; or the first mounting bases 220 are movable along a third direction Z, so that the skin harvesting portions 100 are movable along the third direction Z; or the first mounting bases 220 are movable along both the second direction Y and the third direction Z, so that the skin harvesting portions 100 are movable along both the second direction Y and the third direction Z. The spacing and density of the array of skin harvesting portions 100 can be adjusted in real time according to the patient's wound shape or hair follicle distribution requirements.

[0035] Optionally, the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0036] Optionally, the drive unit 200 includes a linear guide rail extending in the second direction Y and / or the third direction Z. A first mounting base 220 is slidably connected to the linear guide rail. Each first mounting base 220 is connected to the guide rail by a slider so that the first mounting base 220 can move in the second direction Y and / or the third direction Z, thereby adjusting the spacing between two adjacent first mounting bases 220 to adjust the spacing between the cutter heads 110 on two adjacent first connecting parts 120.

[0037] Optionally, the drive unit 200 includes a hydraulic cylinder connected to the first mounting base 220. The hydraulic cylinder is used to drive the first mounting base 220 to move along the second direction Y and / or the third direction Z to adjust the spacing between the cutter heads 110 on two adjacent first connecting parts 120.

[0038] like Figure 4 As shown, in some optional embodiments, the blade 110 includes a blade 111, and the blade 111 has a sampling port 112 on the side opposite to the first connecting portion 120 along the first direction X. The sampling port 112 is used to receive skin.

[0039] In these optional embodiments, the blade 110 includes a blade 111. The blade 111 has a sampling port 112 on the side opposite to the first connecting portion 120 along the first direction X. When the blade 111 rotates, it cuts the skin to form an annular cutting surface. The cut skin falls into the sampling port 112, completing the skin removal step.

[0040] like Figure 5 As shown, in some optional embodiments, the blade 111 has a cavity 114, which is connected to the sampling port 112. A barb structure 115 and a piston 117 are provided in the cavity 114. The barb structure 115 has a gap 115c extending along the first direction X. The aperture of the gap 115c gradually decreases along the direction away from the sampling port 112. The piston 117 is located on the side of the barb structure 115 away from the sampling port 112, and the piston 117 is movable along the first direction X through the gap 115c.

[0041] In these optional embodiments, the cut skin enters the cavity 114 through the sampling port 112, and then enters the barbed structure 115 on the side opposite to the sampling port 112 through the gap 115c, completing the sampling. At this time, the piston 117 is located on the side of the barbed structure 115 opposite to the sampling port. The aperture of the gap 115c of the barbed structure 115 gradually decreases, and the barbed structure 115 keeps the skin in the cavity 114, reducing the risk of the skin falling out of the cavity 114. During skin implantation, the piston 117 moves along the first direction X toward the sampling port 112, and the piston 117 pushes the skin and moves synchronously through the gap 115c toward the sampling port 112, pushing the skin from the sampling port 112 to the implantation position.

[0042] Optional, such as Figure 5 As shown, the aperture of the pore 115c is 60%-90% of the diameter of the blade 111.

[0043] Optionally, the distance between the barb structure 115 and the sampling port 112 is between 0.3 mm and 0.8 mm.

[0044] Optionally, the height of the barb structure 115 along the first direction X is between 0.3 mm and 0.6 mm.

[0045] Optional, such as Figure 5 As shown, the barb structure 115 includes a first barb 115a and a second barb 115b. The first barb 115a and the second barb 115b are arranged opposite each other along a direction perpendicular to the first direction X. Along the direction away from the sampling port 112, the first barb 115a and the second barb 115b are inclined toward the middle of the cavity 114.

[0046] Optionally, the spacing between the first barb 115a and the second barb 115b is between 0.18 mm and 1.1 mm.

[0047] Optional, such as Figure 6 As shown, the piston 117 extends along the first direction X through the first connecting portion 120 into the first body portion 230. A driving device 240 is provided in the first body portion 230. The driving device 240 is connected to the piston 117 and is used to drive the piston 117 to move along the first direction X.

[0048] Optionally, the drive device 240 is used to drive the pistons 117 in multiple skin harvesting sites 100 to move synchronously, so as to achieve simultaneous transplantation of multiple skins, thereby improving transplantation efficiency.

[0049] Optionally, the blade 111 is cylindrical, with its axis parallel to the first direction X. The diameter of the blade 111 is between 200 and 1200 micrometers, specifically 200, 300, 500, 1000, and 1200 micrometers. Controlling the diameter of the blade 111 within this range reduces the size of the skin wound. Since the axis of the cylindrical blade 111 is parallel to the first direction X, when the blade 111 rotates around its axis, the trauma to the skin caused by the blade 111 is controlled within the diameter range of the cylindrical blade 111, reducing tearing damage to the skin and thus minimizing the degree of skin damage during skin harvesting.

[0050] Animal studies on wound healing effects after skin harvesting, regarding skin harvesting size and healing time: Rats were acclimatized for 7 days. After anesthesia, the rats' backs were shaved, disinfected with povidone-iodine for 3 minutes, and then wiped with 70% alcohol. Skin grafts with diameters of 0.2 mm, 0.5 mm, 1.0 mm, 1.2 mm, 3 mm, 5 mm, and 8 mm were harvested from the rats' backs using a biopsy scalpel, with a thickness of approximately 1 mm. Hemostasis was achieved at the harvest site using sterile cotton balls, but no suturing or other treatment was performed. Postoperative wound healing was observed and recorded daily. Results showed that skin defects with diameters of 0.2 mm, 0.5 mm, 1.0 mm, and 1.2 mm closed within 24 hours post-harvest; a 3 mm defect closed within 72 hours; a 5 mm defect closed within 96 hours; and an 8 mm defect closed approximately 144 hours post-harvest. These results indicate that controlling the harvested area to approximately 1.2 mm or less in diameter promotes rapid skin healing and reduces postoperative discomfort and infection risks. Therefore, setting the diameter of blade 111 to 200 micrometers to 1200 micrometers can reduce the healing time of the skin harvesting site and reduce post-harvest discomfort and infection risk.

[0051] Optional, such as Figure 3 As shown, multiple skin-harvesting sections 100 are arranged in an array, and the center distance between the blades 110 of two adjacent skin-harvesting sections 100 along the first direction X is 7 mm to 15 mm, specifically 7 mm, 8 mm, 10 mm, 12 mm, 15 mm, etc.

[0052] Animal studies on wound healing effects after skin harvesting, regarding the distance between skin harvesting sites: Rats were acclimatized for 7 days. After anesthesia, the backs of the rats were shaved, disinfected with iodine for 3 minutes, and then wiped with 70% alcohol. Six skin grafts, approximately 1 mm thick and 1 mm in diameter, were taken from the back of each rat using a biopsy scalpel. The graft sites were spaced 3 mm, 5 mm, 7 mm, 8 mm, 10 mm, 12 mm, 15 mm, and 20 mm apart. Hemostasis was performed at the graft sites after harvesting, but no suturing or other treatment was performed. Wound healing was observed and recorded daily post-operatively. Results showed that skin grafts with a diameter of 1.0 mm at graft site intervals of 7 mm, 8 mm, 10 mm, 12 mm, and 15 mm closed within 24 hours post-harvest. At graft site intervals of 3 mm and 5 mm, swelling occurred at the graft sites, and the 1.0 mm diameter skin graft closed within 72 hours post-harvest. These results indicate that graft site intervals of 7 mm or more promote rapid skin healing after harvesting, reducing post-harvest discomfort and the risk of infection. Therefore, the center-to-center distance between the blades 110 of two adjacent skin harvesting sites 100 along the direction perpendicular to the first direction X is 7 mm to 15 mm, which can reduce the healing time of the skin harvesting site and reduce post-harvest discomfort and infection risk. Optional, such as Figure 4As shown, a protective layer 113 is provided on the inner wall of the sampling port 112. The protective layer 113 is used to reduce the adhesion between the skin tissue and the inner wall of the sampling port 112 and improve the integrity of the sampled skin.

[0053] Optionally, the material of the protective layer 113 may include polytetrafluoroethylene.

[0054] In some alternative embodiments, after the skin grafting device extracts tiny autologous skin cells through the skin harvesting structure 10, the blade 111 of the cutting head 110 of the skin harvesting structure 10 punctures the recipient area skin and implants the skin into the recipient area. Alternatively, the skin grafting device also includes a pit-forming structure 20, in which multiple pit-forming sections 300 simultaneously form micro-pits in the recipient area (allogeneic skin or artificial skin), and the cutting head 110 of the skin harvesting structure 10 carries the autologous skin cells and implants them into the pits.

[0055] like Figure 7 As shown, in some optional embodiments, the skin grafting device further includes a pit-making structure 20, which includes a plurality of pit-making portions 300. Each pit-making portion 300 includes a second connecting portion 320, which extends along a first direction X. One end of the second connecting portion 320 along the first direction X is provided with a tip 310. The distance between two adjacent pit-making portions 300 is equal to the distance between two adjacent skin-harvesting portions 100.

[0056] In these optional embodiments, the pit-creating structure 20 includes multiple pit-creating portions 300, which simultaneously form micro-pits in the recipient area (allogeneic skin or artificial skin), significantly improving pit-creating efficiency, especially suitable for large-area skin repair needs, and reducing surgical time. The multiple pit-creating portions 300 are spaced apart along a direction perpendicular to the first direction X, creating pits at different locations on the recipient area, thereby reducing damage to the allogeneic or artificial skin. Each pit-creating portion 300 includes a second connecting portion 320 extending along the first direction X. One end of the second connecting portion 320 along the first direction X is provided with a tip 310, which is a conical or needle-like structure used to puncture and create micro-pits in the recipient area. The skin harvesting portion 100 implants the extracted micro-autologous skin, carrying hair follicles, sweat glands, and melanocytes, into the micro-pits, allowing the allogeneic or artificial skin to regenerate with a structure and function close to natural skin, thereby improving the skin transplantation effect. The spacing between two adjacent pit creation sections 300 is equal to the spacing between two adjacent skin harvesting sections 100, ensuring that the pits formed by the pit creation section 300 in the recipient area correspond one-to-one with the skin harvesting section 100, so that the autologous skin on the skin harvesting section 100 can be accurately implanted into each pit, thereby improving implantation efficiency.

[0057] like Figure 7As shown, in some alternative embodiments, along the direction away from the second connection portion 320, the tip 310 gradually decreases in cross-sectional area perpendicular to the first direction X.

[0058] In these alternative embodiments, the tip 310 gradually decreases in cross-sectional area perpendicular to the first direction X along a direction away from the second connection portion 320, forming a conical or pyramidal structure.

[0059] Optionally, the diameter of the tip 310 facing the second connector 320 is 150 micrometers to 300 micrometers, and the diameter of the tip 310 facing away from the second connector 320 is 20 micrometers to 50 micrometers.

[0060] Optionally, the tip 310 is made of medical-grade stainless steel or titanium alloy.

[0061] like Figure 8 and Figure 9 As shown, in some alternative embodiments, the end of the tip 310 away from the second connecting portion 320 is cylindrical, and the tip 310 has a pitting opening 311 on the side away from the second connecting portion 320 along the first direction X, the pitting opening 311 being used to accommodate skin.

[0062] In these optional embodiments, the tip 310 has a cylindrical design at its end. The axis of the cylindrical tip 310 is parallel to the first direction X. The tip 310 has a pit-making opening 311 on the side opposite to the second connecting portion 320 along the first direction X. The pit-making opening 311 has a sharp edge, and the tip 310 makes a circumferential cut to the recipient area to form a regular cylindrical pit, which improves the success rate of autologous skin implantation from the skin harvesting portion 100 into each pit. The pit-making opening 311 is used to accommodate the skin of the recipient area.

[0063] like Figure 7 and Figure 8 As shown, in some optional embodiments, the pit-making structure 20 further includes a mounting portion 330, which is provided with a plurality of second mounting seats 331. The plurality of second mounting seats 331 are spaced apart along a direction perpendicular to the first direction X, and the other end of the second connecting portion 320 of the plurality of pit-making portions 300 is connected to the second mounting seat 331 along the first direction X.

[0064] In these optional embodiments, the second connecting portion 320 of the plurality of pit-making portions 300 is connected to the other end of the second mounting base 331 along the first direction X. The plurality of second mounting bases 331 are spaced apart along the first direction X. The second mounting bases 331 are used to fix the position of the pit-making portions 300 so that the plurality of pit-making portions 300 are spaced apart along the first direction X. During the pit-making process, the plurality of pit-making portions 300 simultaneously make pits in the recipient area, thereby improving the pit-making efficiency.

[0065] Optionally, there is a first gap between the blades 110 of two adjacent first skin harvesting sections 100 and a second gap between the tips 310 of two adjacent pit-making sections 300. The first gap is equal to the second gap. Multiple pit-making sections 300 and multiple skin harvesting sections 100 can be set in a one-to-one correspondence. After obtaining tiny autologous skin, the skin harvesting section 100 can be implanted into multiple micro-pits at the same time.

[0066] In some alternative embodiments, the mounting portion 330 includes a second drive motor 332 for driving the second mounting base 331 to rotate about an axis parallel to the first direction X.

[0067] In these optional embodiments, the second drive motor 332 drives the second mounting base 331 to rotate about an axis parallel to the first direction X, and drives the pit-making part 300 to rotate about an axis parallel to the first direction X to make a pit. When the pit-making structure 20 includes multiple pit-making parts 300, the pressure required for multiple pit-making parts 300 to make pits simultaneously is relatively large. The second drive motor 332 is set to drive the pit-making part 300 to rotate about an axis parallel to the first direction X to cut the skin of the recipient area, thereby improving the pit-making effect of the pit-making part 300.

[0068] Optional, such as Figure 8 As shown, the mounting section 330 includes multiple second drive motors 332, each connected to a second mounting base 331. The second drive motors 332 and second mounting bases 331 are connected in a one-to-one correspondence. The second connecting section 320 is rigidly connected to the second mounting base 331. When the second drive motors 332 rotate, they directly drive the pit-creating section 300 to rotate. This design is compact, with efficient power transmission and reduced energy loss. Each pit-creating section 300 is driven by a separate second drive motor 332, allowing independent adjustment of speed, direction, and start / stop time to achieve differentiated pit creation at different sites. For example, parameter optimization can be applied to areas with dense hair follicles versus areas with normal skin, improving adaptability. During the procedure, the torque or speed of a specific second drive motor 332 can be adjusted in real time based on differences in skin thickness and pit creation location to optimize the pit creation effect. Furthermore, a single motor failure only affects the corresponding pit-creating section 300; the remaining second drive motors 332 can still operate normally, improving the reliability of the skin grafting device and enhancing surgical safety.

[0069] Optional, such as Figure 10As shown, multiple second mounting bases 331 are connected to the same second drive motor 332 via a second transmission component 333. The second drive motor 332 simultaneously drives the multiple second mounting bases 331 to rotate. The second transmission component 333 can be a gear set, etc. A single second drive motor 332 drives multiple second mounting bases 331 to rotate synchronously, improving the consistency of the movements of multiple pit-forming sections 300, reducing pit depth or angle deviations caused by asynchronous operations, and improving surgical uniformity. Connecting multiple second mounting bases 331 to the same second drive motor 332 via the second transmission component 333 helps reduce hardware costs and energy consumption, while simplifying the complexity of the control system and making it easier to maintain and calibrate. Single-motor centralized drive eliminates the need to reserve installation space for the second drive motor 332 for each pit-forming section 300, making the overall structure of the device more compact and facilitating flexible operation in narrow surgical areas.

[0070] like Figure 11 As shown, in some optional embodiments, a plurality of second mounting bases 331 are arranged in an array, and each second mounting base 331 is movably disposed along a second direction Y and / or a third direction Z, the second direction Y and the third direction Z intersect, and the second direction Y and the third direction Z are perpendicular to the first direction X.

[0071] In these optional embodiments, a plurality of second mounting bases 331 are arranged in an array, and a plurality of pit-forming portions 300 are arranged in an array. The second mounting bases 331 are movable along a second direction Y, so that the pit-forming portions 300 are movable along the second direction Y; or the second mounting bases 331 are movable along a third direction Z, so that the pit-forming portions 300 are movable along the third direction Z; or the second mounting bases 331 are movable along both the second direction Y and the third direction Z, so that the pit-forming portions 300 are movable along both the second direction Y and the third direction Z. The spacing and density of the array of pit-forming portions 300 can be adjusted in real time according to the patient's wound shape or hair follicle distribution requirements.

[0072] Optionally, the mounting portion 330 includes a linear guide rail extending in the second direction Y and / or the third direction Z. The second mounting base 331 is slidably connected to the linear guide rail. Each second mounting base 331 is connected to the guide rail by a slider so that the second mounting base 331 can move along the second direction Y and / or the third direction Z, thereby adjusting the spacing between two adjacent second mounting bases 331 to adjust the spacing between the tips 310 on two adjacent second connecting portions 320.

[0073] Optionally, the mounting part 330 includes a hydraulic cylinder connected to the second mounting base 331. The hydraulic cylinder is used to drive the second mounting base 331 to move along the second direction Y and / or the third direction Z to adjust the spacing between the tips 310 on two adjacent second connecting parts 320.

[0074] Optional, such as Figure 11As shown, multiple pit-making parts 300 are arranged in an array, and the center distance between the tips 310 of two adjacent pit-making parts 300 along the first direction X is 7 mm to 15 mm, specifically 7 mm, 8 mm, 10 mm, 12 mm, 15 mm, etc.

[0075] Optionally, the skin harvesting structure 10 includes multiple skin harvesting parts 100, the number of which can be between 10 and 1000, specifically 10, 50, 100, 200, 500, 800, 1000, etc.

[0076] Optionally, the pit-making structure 20 includes multiple pit-making sections 300, the number of which can be between 10 and 1000, specifically 10, 50, 100, 200, 500, 800, 1000, etc.

[0077] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A skin grafting device, characterized in that, include: Skin harvesting structure, the skin harvesting structure comprising: Multiple skin-harvesting sections, each skin-harvesting section including a blade and a first connecting portion, the first connecting portion extending along a first direction, and the blade being connected to one end of the first connecting portion along the first direction; The driving part is rotatably connected to the other end of the first connecting part along the first direction. A plurality of skin-harvesting parts are arranged at intervals perpendicular to the first direction. The driving part is used to drive the skin-harvesting parts to rotate about an axis parallel to the first direction.

2. The skin grafting device according to claim 1, characterized in that, The driving unit includes a first body, a first drive motor, and a plurality of first mounting seats. The plurality of first mounting seats are connected to the first body and are spaced apart along a direction perpendicular to the first direction. The first drive motor is used to drive the first mounting seats to rotate about an axis parallel to the first direction. The other end of the first connecting portion of the plurality of skin-picking portions is connected to the first mounting seat along the first direction.

3. The skin grafting device according to claim 2, characterized in that, Multiple first mounting bases are arranged in an array, each first mounting base is movably disposed along a second direction and / or a third direction, and / or the center distance between two adjacent skin-taking heads is 7 mm to 15 mm; the second direction and the third direction intersect each other, and the second direction and the third direction are perpendicular to the first direction.

4. The skin grafting device according to claim 1, characterized in that, The blade includes a blade, and the blade has a sampling port on the side opposite to the first connection part along the first direction. The sampling port is used to accommodate skin.

5. The skin grafting device according to claim 4, characterized in that, The blade has a cavity that is connected to the sampling port. A barb structure and a piston are provided in the cavity. The barb structure has a gap extending along the first direction. The diameter of the gap gradually decreases along the direction away from the sampling port. The piston is located on the side of the barb structure away from the sampling port and is movable along the first direction through the gap.

6. The skin grafting device according to claim 4, characterized in that, The blade is cylindrical and has a diameter of 200 micrometers to 1200 micrometers.

7. The skin grafting device according to claim 1, characterized in that, The skin grafting device further includes a pit-making structure, which includes multiple pit-making portions. Each pit-making portion includes a second connecting portion that extends along the first direction. One end of the second connecting portion along the first direction is provided with a pointed tip. The distance between two adjacent pit-making portions is equal to the distance between two adjacent skin-harvesting portions.

8. The skin grafting device according to claim 7, characterized in that, Along the direction away from the second connecting portion, the cross-sectional area of ​​the tip gradually decreases along the direction perpendicular to the first direction; or, the end of the tip away from the second connecting portion is cylindrical, and a pitting opening is formed on the side of the tip away from the second connecting portion along the first direction, the pitting opening being used to accommodate skin.

9. The skin grafting device according to claim 8, characterized in that, The pit-making structure also includes an installation part, which is provided with a plurality of second mounting seats. The plurality of second mounting seats are spaced apart along a direction perpendicular to the first direction, and the other end of the second connecting part of the plurality of pit-making parts is connected to the second mounting seats along the first direction.

10. The skin grafting device according to claim 9, characterized in that, The mounting part includes a second drive motor, which drives the second mounting base to rotate about an axis parallel to the first direction.

11. The skin grafting device according to claim 9, characterized in that, Multiple second mounting bases are arranged in an array, and each second mounting base is movably disposed along a second direction and / or a third direction, the second direction and the third direction intersect each other, and the second direction and the third direction are perpendicular to the first direction.

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