Micro-needle-density-adjustable handheld medical skin rolling needle

Abstract

The invention relates to the technical field of medical instruments, in particular to a micro-needle density adjustable handheld medical skin roller needle. Comprising a handle, two sets of supports are symmetrically arranged on the handle, and a roller pin assembly is rotationally connected between the two sets of supports; the roller pin assembly comprises a cylinder, a plurality of sets of mounting plates are pushed to move towards one corresponding set of adjusting grooves while one ends of a plurality of sets of linkage rods move, so that a plurality of sets of movable microneedle sets synchronously move to the outside of the cylinder, and the movable microneedle sets and a plurality of sets of fixed microneedle sets are distributed in an annular array. The threaded shaft is driven by the motor to rotate reversely, the movable microneedle sets can retract into the cylinder, the density of the microneedles is reduced, automatic adjustment of the density of the microneedles is achieved, manual disassembly and assembly of the microneedles are not needed, and the working efficiency is improved. The micro-needle density adjusting efficiency is effectively improved, and meanwhile pollution to the micro-needles caused by manual disassembly and assembly is avoided.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a handheld medical skin roller with adjustable microneedle density. Background Technology

[0002] A dermaroller is a device that uses an array of microneedles to pierce the stratum corneum to promote drug penetration, collagen regeneration, or skin repair. It is widely used in cosmetic procedures (such as wrinkle removal and spot reduction) and clinical treatments (such as scar repair and hair loss treatment).

[0003] Traditional medical roller needles have non-adjustable microneedle density, requiring the purchase of multiple devices to suit different indications, which is costly and cumbersome to operate.

[0004] A search revealed that in the prior art, patent document CN221106742U, published on June 11, 2024, discloses a medical skin roller needle, relating to the field of medical device technology. It includes a roller, a support, and a handle. The two ends of the roller are rotatably connected to the inside of the support. The bottom end of the support is connected to the top end of the handle. The inside of the handle is configured as a receiving cavity, in which a syringe is positioned and placed. The syringe is connected to the support through the handle. This utility model of a medical skin roller needle uses an electric telescopic rod to push the syringe for drug delivery. One needle per patient avoids drug residue. Only the drug channel needs to be cleaned, reducing the difficulty of cleaning. It facilitates adjustment of the drug composition and dosage, making drug delivery more stable and improving work efficiency. The roller is composed of a needle plate and spacers. By adjusting the number and position of the needle plate and spacers, the density of the microneedles can be changed to achieve different therapeutic effects.

[0005] However, the device still has the following drawbacks: although it can change the density of the microneedles, it cannot achieve automatic adjustment. The needle plate and spacer pad need to be manually disassembled and installed, which is cumbersome. In addition, the roller needles can easily cause injury to the operator and also cause contamination of the roller needles during operation. Summary of the Invention

[0006] To address the above problems, the present invention provides a handheld medical skin roller with adjustable microneedle density, including a handle, on which two sets of supports are symmetrically arranged, and a roller assembly is rotatably connected between the two sets of supports.

[0007] The needle roller assembly includes a cylindrical body, on which cylindrical protective boxes are fixedly connected to the inner walls of both sides. Several groups of fixed microneedles are arranged in a circular array on the cylindrical body.

[0008] A set of the cylindrical protective boxes contains a motor installed inside, and the output end of the motor is connected to a threaded shaft.

[0009] The outer walls of both sets of cylindrical protective boxes are arranged in a ring array with several sets of limiting shafts, and a microneedle mounting part is provided between each pair of oppositely arranged limiting shafts;

[0010] The microneedle mounting part includes a mounting plate, on which a movable microneedle assembly is mounted, and a first hinge frame is provided on the mounting plate;

[0011] The threaded shaft is provided with a micro-needle adjustment part, which includes an internal threaded cylinder. The internal threaded cylinder is threadedly connected to the threaded shaft. The outer wall of the internal threaded cylinder is provided with several sets of second hinge frames. Each set of second hinge frames is rotatably connected with a linkage rod. The other end of each set of linkage rods is rotatably connected to a corresponding set of first hinge frames.

[0012] Furthermore, the cylinder is provided with several sets of adjustment grooves, which are respectively set between each pair of adjacent fixed microneedle groups, and the adjustment grooves are respectively movably fitted with a corresponding set of mounting plates.

[0013] Furthermore, the inner wall of the cylinder is provided with several sets of clearance grooves, and the other end of each of the several sets of limiting shafts is fixedly connected to the inner wall of the corresponding set of clearance grooves. Both ends of the mounting plate are fixedly connected to limiting blocks, and each of the two sets of limiting blocks has a limiting hole, which is movably fitted with the corresponding set of limiting shafts.

[0014] Furthermore, the cylindrical body is provided with several sets of storage slots, each set of storage slots being interconnected with a corresponding set of adjustment slots. The cylindrical body is also provided with several sets of fan-shaped slots, each set of fan-shaped slots being interconnected with a corresponding set of storage slots.

[0015] Furthermore, a protective mechanism is rotatably connected to one of the cylindrical protective boxes, and a torsion spring is provided between the protective mechanism and the cylindrical body, with the torsion spring sleeved on the cylindrical protective box.

[0016] Furthermore, the protective mechanism includes a sleeve, which is rotatably connected to the outer wall of a set of cylindrical protective boxes. The side wall of the sleeve is provided with a number of connecting plates in a circular array. A sealing protective cover plate is fixedly connected to the top of the connecting plates. A first magnetic block is installed on the outer wall of the sleeve.

[0017] Furthermore, a fixing frame is provided on the outer wall of the internally threaded cylinder, and a second magnetic block is installed on the fixing frame.

[0018] Furthermore, a sealing cap is provided at one end of the handle, the handle is a hollow tube, the inside of the handle stores a medicinal solution for skin treatment, and an injection mechanism is provided between one end of the handle and the roller assembly.

[0019] Furthermore, the injection mechanism includes a limiting frame, on which a flexible plate is fixedly connected. The other end of the flexible plate is fixedly connected to the bottom end of the handle. Two sets of rotating shafts are rotatably connected to the inner wall of the limiting frame. Sponge liquid-absorbing sleeves are sleeved on both sets of rotating shafts. Both sets of sponge liquid-absorbing sleeves are in contact with several sets of fixed microneedles and several sets of movable microneedles.

[0020] Furthermore, an injection tube is fixedly connected to the inner wall of the limiting frame. The injection tube is equipped with several sets of injection heads, and the outlet ends of the injection heads face the surfaces of the two sets of sponge absorbent sleeves respectively. The top end of the injection tube is connected to a transmission tube, and the transmission tube and the injection tube are internally interconnected. Several sets of inlets are opened on the side wall of the transmission tube, and a sealing plug is fixedly connected to the top end of the transmission tube. An injection port is opened at the center of the bottom end of the handle. The injection port is movably fitted with the transmission tube, and the injection port is movably engaged with the sealing plug.

[0021] The beneficial effects of this invention are:

[0022] 1. The motor drives the threaded shaft to rotate, causing the internal threaded cylinder to move synchronously with several sets of second hinge frames. This causes one end of several sets of linkage rods to move, pushing several sets of mounting plates toward the corresponding set of adjustment slots. This causes several sets of movable microneedles to move synchronously to the outside of the cylinder, forming a circular array with several sets of fixed microneedles, thus increasing the density of the microneedles. By driving the threaded shaft to rotate in the opposite direction, the movable microneedles can retract into the inside of the cylinder, reducing the density of the microneedles. This achieves automatic adjustment of the microneedle density without the need for manual disassembly and installation, effectively improving the efficiency of microneedle density adjustment while avoiding contamination of the microneedles caused by manual disassembly and installation.

[0023] 2. After the active microneedle assembly is fully inserted into the cylinder, the attraction between the second magnetic block and the first magnetic block is greater than the tension of the torsion spring, causing the second magnetic block to rotate until it comes into contact with the first magnetic block. As the second magnetic block rotates, it drives the sleeve to rotate, causing several sets of connecting plates to drive several sets of sealing and protective covers to rotate synchronously to the corresponding set of adjustment grooves, thus synchronously blocking several sets of adjustment grooves. This effectively prevents impurities of the medicine generated during the needle roller operation from entering the inside of the cylinder, thereby reducing the risk of bacterial growth.

[0024] 3. When the fixed or movable microneedle group rotates to a set of sponge suction sleeves, it exerts a squeezing force on the sponge suction sleeves, causing the sealing plug to move upward and triggering the injection. This allows the liquid to be precisely applied to the surface of the microneedle through the injection head, effectively controlling the injection flow rate and preventing the liquid from being insufficiently absorbed due to excessive flow. Furthermore, the liquid will only flow out automatically when the roller needle operation is performed, eliminating the need for manual control and making the roller needle operation more convenient.

[0025] 4. After the needle roller operation is completed, hold the handle and invert it. At this time, the sealing plug will descend and detach from the injection port due to the gravity of the injection mechanism itself. This will cause the residual medicine in the sponge suction sleeve and the limiting frame to flow back into the handle, thereby avoiding waste of raw materials. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the main structure according to an embodiment of the present invention is shown;

[0028] Figure 2 A schematic diagram of the needle roller assembly structure according to an embodiment of the present invention is shown;

[0029] Figure 3 A schematic diagram showing the connection relationship between the protective mechanism and the cylinder according to an embodiment of the present invention is shown;

[0030] Figure 4 A schematic diagram of the protective mechanism structure according to an embodiment of the present invention is shown;

[0031] Figure 5 A schematic diagram showing the connection relationship between the microneedle mounting part and the cylinder body according to an embodiment of the present invention is shown;

[0032] Figure 6 A schematic diagram showing the connection relationship between the microneedle mounting part and the threaded shaft according to an embodiment of the present invention is shown;

[0033] Figure 7 An embodiment of the present invention is shown. Figure 6 Enlarged view of point A in the middle;

[0034] Figure 8 A schematic cross-sectional view of the main body structure according to an embodiment of the present invention is shown;

[0035] Figure 9 An embodiment of the present invention is shown. Figure 8 Enlarged diagram of point B in the middle.

[0036] In the diagram: 100, Handle; 110, Sealing cap; 120, Support; 130, Injection port; 200, Needle roller assembly; 210, Cylinder body; 211, Storage groove; 212, Fan-shaped groove; 213, Adjustment groove; 214, Clearance groove; 220, Fixing microneedle assembly; 230, Cylindrical protective box; 231, Motor; 240, Protective mechanism; 241, Sleeve; 242, Connecting plate; 243, Sealing protective cover plate; 244, First magnetic block; 250, Torsion spring; 260, Limiting shaft; 270, Microneedle mounting part; 271, Installation. 272. Plate; 273. Limiting block; 274. Limiting hole; 275. Movable microneedle assembly; 276. First hinge frame; 280. Threaded shaft; 290. Microneedle adjustment part; 291. Internal threaded cylinder; 292. Second hinge frame; 293. Linkage rod; 294. Fixing frame; 295. Second magnetic block; 300. Liquid injection mechanism; 310. Limiting frame; 320. Flexible plate; 330. Rotating shaft; 340. Sponge liquid absorption sleeve; 350. Liquid injection tube; 351. Liquid injection head; 360. Transmission tube; 361. Liquid inlet; 370. Sealing plug. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0038] This invention provides a handheld medical skin roller with adjustable microneedle density, including a handle 100; exemplarily, such as... Figure 1 As shown.

[0039] A sealing cap 110 is provided at one end of the handle 100. The handle 100 is a hollow tube. The interior of the handle 100 stores a medicinal solution for skin treatment. Two sets of supports 120 are symmetrically arranged on the handle 100. A roller needle assembly 200 is rotatably connected between the two sets of supports 120. An injection mechanism 300 is provided between one end of the handle 100 and the roller needle assembly 200.

[0040] Specifically, by opening the sealing cap 110, the medicine is injected into the handle 100. By holding the handle 100, the roller assembly 200 is rolled on the skin. The medicine is introduced into the surface of the roller assembly 200 through the injection mechanism 300, so that the medicine adheres to the skin. The rolling of the roller assembly 200 promotes the absorption of the medicine.

[0041] For example, such as Figures 2-4 As shown.

[0042] The needle roller assembly 200 includes a cylindrical body 210, and cylindrical protective boxes 230 are fixedly connected to the inner walls of both sides of the cylindrical body 210. A protective mechanism 240 is rotatably connected to a set of cylindrical protective boxes 230. A torsion spring 250 is provided between the protective mechanism 240 and the cylindrical body 210, and the torsion spring 250 is sleeved on the cylindrical protective box 230.

[0043] The cylindrical body 210 is provided with a plurality of fixed microneedle groups 220 arranged in a circular array. The cylindrical body 210 is provided with a plurality of adjustment grooves 213, which are respectively located between each pair of adjacent fixed microneedle groups 220. The cylindrical body 210 is provided with a plurality of storage grooves 211, which are respectively connected to a corresponding set of adjustment grooves 213. The cylindrical body 210 is provided with a plurality of fan-shaped grooves 212, which are respectively connected to a corresponding set of storage grooves 211.

[0044] The protective mechanism 240 includes a sleeve 241, which is rotatably connected to the outer wall of a set of cylindrical protective boxes 230. The side wall of the sleeve 241 is provided with a plurality of connecting plates 242 arranged in a ring array. The plurality of connecting plates 242 are respectively movably fitted with a corresponding set of fan-shaped grooves 212. A sealing protective cover plate 243 is fixedly connected to the top of the connecting plate 242. The sealing protective cover plate 243 is movably fitted with the storage groove 211. The sealing protective cover plate 243 is matched with a corresponding set of adjustment grooves 213. A first magnetic block 244 is installed on the outer wall of the sleeve 241.

[0045] Specifically, the sleeve 241 drives several sets of connecting plates 242 to rotate, causing several sets of sealing and protective covers 243 to rotate synchronously. The sealing and protective covers 243 rotate to their respective positions at a set of adjustment grooves 213, covering the adjustment grooves 213 and protecting the inside of the cylinder 210 to prevent external impurities from entering. The sleeve 241 then drives several sets of connecting plates 242 to rotate in the opposite direction, causing the sealing and protective covers 243 to rotate synchronously in the opposite direction. This disengages the sealing and protective covers 243 from their respective adjustment grooves 213, leaving the adjustment grooves 213 in an open state for easy adjustment of the microneedle density.

[0046] For example, such as Figures 5-7 As shown.

[0047] A motor 231 is installed inside one set of the cylindrical protective boxes 230. The output end of the motor 231 is connected to a threaded shaft 280. The other end of the threaded shaft 280 is rotatably connected to the center of another set of cylindrical protective boxes 230.

[0048] The outer walls of both sets of cylindrical protective boxes 230 are arranged in a ring array with several sets of limiting shafts 260. The inner wall of the cylindrical body 210 is provided with several sets of relief grooves 214. The other end of each set of limiting shafts 260 is fixedly connected to the inner wall of a corresponding set of relief grooves 214. A microneedle mounting part 270 is provided between each pair of oppositely arranged limiting shafts 260.

[0049] The microneedle mounting part 270 includes a mounting plate 271, which is movably fitted to the inner wall of a corresponding set of adjustment grooves 213. Both ends of the mounting plate 271 are fixedly connected to limit blocks 272. Limit holes 273 are provided on both sets of limit blocks 272. The two sets of limit holes 273 are movably fitted to a corresponding set of limit shafts 260. A movable microneedle assembly 274 is mounted on the mounting plate 271. A first hinge frame 275 is provided on the mounting plate 271.

[0050] The threaded shaft 280 is provided with a microneedle adjustment part 290, which includes an internal threaded cylinder 291. The internal threaded cylinder 291 is threadedly connected to the threaded shaft 280. The outer wall of the internal threaded cylinder 291 is provided with a plurality of sets of second hinge frames 292 in an annular array. Each of the plurality of sets of second hinge frames 292 is rotatably connected with a linkage rod 293. The other end of each of the plurality of sets of linkage rods 293 is rotatably connected to a corresponding set of first hinge frames 275. The outer wall of the internal threaded cylinder 291 is provided with a fixing frame 294. A second magnetic block 295 is installed on the fixing frame 294. The second magnetic block 295 matches the first magnetic block 244.

[0051] Specifically, the motor 231 drives the threaded shaft 280 to rotate, causing the internal threaded cylinder 291 to drive several sets of second hinge frames 292 to move synchronously. This causes one end of several sets of linkage rods 293 to move while pushing several sets of mounting plates 271 toward the corresponding set of adjustment grooves 213. This causes several sets of movable microneedle groups 274 to move synchronously to the outside of the cylinder 210. The several sets of movable microneedle groups 274 and several sets of fixed microneedle groups 220 are arranged in a ring array, thereby increasing the density of microneedles.

[0052] Furthermore, the motor 231 drives the threaded shaft 280 to rotate in the opposite direction, causing the internal threaded cylinder 291 to move in the opposite direction. This causes several sets of mounting plates 271 to move the movable microneedle sets 274 toward the center of the cylinder 210, housing the movable microneedle sets 274 inside the cylinder 210. Simultaneously, the movement of the internal threaded cylinder 291 causes the second magnetic block 295 to move toward the first magnetic block 244, generating an attractive force on the first magnetic block 244. The shorter the distance between the second magnetic block 295 and the first magnetic block 244, the stronger the attractive force between them. After the movable microneedle sets 274 are completely inside the cylinder 210, the second magnetic block 295... The attraction value between the second magnetic block 295 and the first magnetic block 244 is greater than the tension value of the torsion spring 250, causing the second magnetic block 295 to rotate until it comes into contact with the first magnetic block 244. As the second magnetic block 295 rotates, it drives the sleeve 241 to rotate, causing several sets of connecting plates 242 to drive several sets of sealing and protective cover plates 243 to rotate synchronously to the corresponding set of adjustment grooves 213, thus synchronously blocking several sets of adjustment grooves 213. This results in only several sets of fixed microneedle groups 220 remaining on the surface of the cylinder 210, reducing the density of microneedles and simultaneously sealing and protecting the inside of the cylinder 210, effectively preventing impurities of the medicine generated during the roller needle operation from entering the inside of the cylinder 210.

[0053] For example, such as Figures 8-9 As shown.

[0054] The injection mechanism 300 includes a limiting frame 310, on which a flexible plate 320 is fixedly connected. The other end of the flexible plate 320 is fixedly connected to the bottom end of the handle 100. Two sets of rotating shafts 330 are rotatably connected to the inner wall of the limiting frame 310. Each set of rotating shafts 330 is fitted with a sponge absorbent sleeve 340. Both sets of sponge absorbent sleeves 340 are in contact with several sets of fixed microneedle groups 220 and several sets of movable microneedle groups 274. An injection tube 350 is fixedly connected to the inner wall of the limiting frame 310. The injection tube 350 is provided with several... The dry injection head 351 has several injection heads 351 whose outlet ends face the surfaces of two sets of sponge suction sleeves 340 respectively. The top end of the injection tube 350 is connected to the transmission tube 360, and the transmission tube 360 ​​is internally connected to the injection tube 350. Several sets of inlet ports 361 are opened on the side wall of the transmission tube 360. A sealing plug 370 is fixedly connected to the top end of the transmission tube 360. An injection port 130 is opened at the center of the bottom end of the handle 100. The injection port 130 is movably fitted with the transmission tube 360, and the injection port 130 is movably engaged with the sealing plug 370.

[0055] Specifically, before performing the roller needle operation by holding the handle 100, the injection port 130 of the handle 100 is in a downward position. At this time, due to the gravity of the limiting injection mechanism 300, the sealing plug 370 moves downward to cover the injection port 130, preventing the liquid in the handle 100 from flowing out. When performing the roller needle operation, the fixed microneedle group 220 and the movable microneedle group 274 rotate. When one of the fixed microneedle groups 220 or the movable microneedle group 274 rotates to a set of sponge absorbent sleeves 340, a squeezing force is generated on the sponge absorbent sleeves 340, causing the limiting frame 310 to move upward. The flexible plate 320 is squeezed and deformed, causing the injection tube 350 to drive the transmission tube 360 ​​and the sealing plug 370. The upward movement causes the inlet 361 on the transmission tube 360 ​​to move into the handle 100, allowing the liquid medicine in the handle 100 to enter the transmission tube 360 ​​through the inlet 361. Then, it flows out through several sets of injection heads 351 to the surface of two sets of sponge suction sleeves 340, allowing the sponge suction sleeves 340 to absorb the liquid medicine. This causes the fixed microneedle group 220 or the movable microneedle group 274 to rotate to the surface of the sponge suction sleeve 340 and squeeze it, causing the liquid medicine to adhere to the needle position of the fixed microneedle group 220 or the movable microneedle group 274. With the rolling action, the needle with the liquid medicine is inserted into the patient's skin, allowing the liquid medicine to enter synchronously, thus realizing the automatic liquid injection function of the roller needle.

[0056] Furthermore, after the needle roller operation is completed, the handle 100 is held and inverted. At this time, the sealing plug 370 is lowered and separated from the injection port 130 by the gravity of the injection mechanism 300 itself. This causes the residual medicine in the sponge suction sleeve 340 and the limiting frame 310 to flow back into the handle 100, thereby avoiding waste of raw materials.

[0057] The working principle of the handheld medical skin roller with adjustable microneedle density proposed in this invention is as follows:

[0058] By opening the sealing cap 110, the medication for skin care is injected into the handle 100. By holding the handle 100, the roller assembly 200 is rolled on the skin. The medication is introduced into the surface of the roller assembly 200 through the injection mechanism 300, so that the medication adheres to the skin. The rolling of the roller assembly 200 promotes the absorption of the medication.

[0059] The sleeve 241 drives several sets of connecting plates 242 to rotate, causing several sets of sealing and protective covers 243 to rotate synchronously. The sealing and protective covers 243 rotate to their respective positions at a set of adjustment grooves 213, covering the adjustment grooves 213 and protecting the inside of the cylinder 210 from external impurities. The sleeve 241 then drives several sets of connecting plates 242 to rotate in the opposite direction, causing the sealing and protective covers 243 to rotate synchronously in the opposite direction. This disengages the sealing and protective covers 243 from their respective adjustment grooves 213, leaving the adjustment grooves 213 in an open state for easy adjustment of the microneedle density.

[0060] The motor 231 drives the threaded shaft 280 to rotate, causing the internal threaded cylinder 291 to drive several sets of second hinge frames 292 to move synchronously. This causes one end of several sets of linkage rods 293 to move while pushing several sets of mounting plates 271 toward the corresponding set of adjustment grooves 213. This causes several sets of movable microneedle groups 274 to move synchronously to the outside of the cylinder 210, so that the several sets of movable microneedle groups 274 and several sets of fixed microneedle groups 220 are arranged in a ring array, thereby increasing the density of microneedles.

[0061] The motor 231 drives the threaded shaft 280 to rotate in the opposite direction, causing the internal threaded cylinder 291 to move in the opposite direction. This causes several sets of mounting plates 271 to move the movable microneedle sets 274 toward the center of the cylinder 210, thus housing the movable microneedle sets 274 inside the cylinder 210. Simultaneously, the movement of the internal threaded cylinder 291 causes the second magnetic block 295 to move toward the first magnetic block 244, generating an attractive force on the first magnetic block 244. The shorter the distance between the second magnetic block 295 and the first magnetic block 244, the stronger the attractive force between them. After the movable microneedle sets 274 are completely inside the cylinder 210, the second magnetic block 295 and the first magnetic block 244... The attraction between the magnetic blocks 244 is greater than the tension of the torsion spring 250, causing the second magnetic block 295 to rotate until it comes into contact with the first magnetic block 244. As the second magnetic block 295 rotates, it drives the sleeve 241 to rotate, causing several sets of connecting plates 242 to drive several sets of sealing and protective cover plates 243 to rotate synchronously to the corresponding set of adjustment grooves 213, thus synchronously blocking several sets of adjustment grooves 213. This results in only several sets of fixed microneedle groups 220 remaining on the surface of the cylinder 210, reducing the density of microneedles and simultaneously sealing and protecting the inside of the cylinder 210, effectively preventing impurities of the medicine generated during the roller needle operation from entering the inside of the cylinder 210.

[0062] Before performing the needle rolling operation by holding the handle 100, the injection port 130 of the handle 100 is in a downward position. At this time, due to the gravity of the limiting injection mechanism 300, the sealing plug 370 moves downward to cover the injection port 130, preventing the liquid medicine in the handle 100 from flowing out. When performing the needle rolling operation, the fixed microneedle group 220 and the movable microneedle group 274 rotate. When one of the fixed microneedle groups 220 or the movable microneedle group 274 rotates to a set of sponge suction sleeves 340, a squeezing force is generated on the sponge suction sleeves 340, causing the limiting frame 310 to move upward. The flexible plate 320 is squeezed and deformed, causing the injection tube 350 to drive the transmission tube 360 ​​and the sealing plug 370 upward. The movement causes the inlet 361 on the transmission tube 360 ​​to move to the inside of the handle 100, allowing the liquid medicine in the handle 100 to enter the transmission tube 360 ​​through the inlet 361. Then, it flows out through several sets of injection heads 351 to the surface of two sets of sponge suction sleeves 340, allowing the sponge suction sleeves 340 to absorb the liquid medicine. This causes the fixed microneedle group 220 or the movable microneedle group 274 to rotate to the surface of the sponge suction sleeve 340 and squeeze it, causing the liquid medicine to adhere to the needle position of the fixed microneedle group 220 or the movable microneedle group 274. With the rolling action, the needle with the liquid medicine attached is inserted into the patient's skin, allowing the liquid medicine to enter synchronously, realizing the automatic liquid injection function of the roller needle.

[0063] After the needle roller operation is completed, the handle 100 is held and inverted. At this time, the sealing plug 370 is lowered and separated from the injection port 130 by the gravity of the injection mechanism 300 itself. This causes the residual medicine in the sponge suction sleeve 340 and the limiting frame 310 to flow back into the handle 100, thereby avoiding waste of raw materials.

[0064] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A handheld medical skin roller with adjustable microneedle density, comprising a handle, characterized in that: Two sets of brackets are symmetrically arranged on the handle, and a needle roller assembly is rotatably connected between the two sets of brackets. The needle roller assembly includes a cylindrical body, on which cylindrical protective boxes are fixedly connected to the inner walls of both sides. Several groups of fixed microneedles are arranged in a circular array on the cylindrical body. A set of the cylindrical protective boxes contains a motor installed inside, and the output end of the motor is connected to a threaded shaft. The outer walls of both sets of cylindrical protective boxes are arranged in a ring array with several sets of limiting shafts, and a microneedle mounting part is provided between each pair of oppositely arranged limiting shafts; The microneedle mounting part includes a mounting plate, on which a movable microneedle assembly is mounted, and a first hinge frame is provided on the mounting plate; The threaded shaft is provided with a micro-needle adjustment part, which includes an internal threaded cylinder. The internal threaded cylinder is threadedly connected to the threaded shaft. The outer wall of the internal threaded cylinder is provided with several sets of second hinge frames. Each set of second hinge frames is rotatably connected with a linkage rod. The other end of each set of linkage rods is rotatably connected to a corresponding set of first hinge frames.

2. The handheld medical skin roller with adjustable microneedle density according to claim 1, characterized in that: The cylinder is provided with several sets of adjustment grooves, which are respectively set between each pair of adjacent fixed microneedle groups, and the adjustment grooves are respectively movably fitted with a corresponding set of mounting plates.

3. The handheld medical skin roller with adjustable microneedle density according to claim 2, characterized in that: The inner wall of the cylinder is provided with several sets of clearance grooves. The other end of each set of limiting shafts is fixedly connected to the inner wall of the corresponding set of clearance grooves. Both ends of the mounting plate are fixedly connected to limiting blocks. Limiting holes are provided on both sets of limiting blocks. The two sets of limiting holes are respectively in contact with the corresponding set of limiting shafts.

4. The handheld medical skin roller with adjustable microneedle density according to claim 2, characterized in that: The cylindrical body has several sets of storage slots, each set of storage slots being interconnected with a corresponding set of adjustment slots. The cylindrical body also has several sets of fan-shaped slots, each set of fan-shaped slots being interconnected with a corresponding set of storage slots.

5. The handheld medical skin roller with adjustable microneedle density according to claim 1, characterized in that: A protective mechanism is rotatably connected to a set of cylindrical protective boxes, and a torsion spring is provided between the protective mechanism and the cylindrical body, with the torsion spring sleeved on the cylindrical protective box.

6. The handheld medical skin roller with adjustable microneedle density according to claim 5, characterized in that... The protective mechanism includes a sleeve, which is rotatably connected to the outer wall of a set of cylindrical protective boxes. Several sets of connecting plates are arranged in a circular array on the side wall of the sleeve. A sealing protective cover plate is fixedly connected to the top of the connecting plate. A first magnetic block is installed on the outer wall of the sleeve.

7. The handheld medical skin roller with adjustable microneedle density according to claim 1, characterized in that: The outer wall of the internally threaded cylinder is provided with a fixing frame, and a second magnetic block is installed on the fixing frame.

8. The handheld medical skin roller with adjustable microneedle density according to claim 1, characterized in that: One end of the handle is provided with a sealing cap. The handle is a hollow tube. The inside of the handle stores a medicinal solution for skin treatment. An injection mechanism is provided between one end of the handle and the roller assembly.

9. The handheld medical skin roller with adjustable microneedle density according to claim 8, characterized in that: The liquid injection mechanism includes a limiting frame, on which a flexible plate is fixedly connected. The other end of the flexible plate is fixedly connected to the bottom end of the handle. Two sets of rotating shafts are rotatably connected to the inner wall of the limiting frame. Sponge liquid-absorbing sleeves are sleeved on both sets of rotating shafts. Both sets of sponge liquid-absorbing sleeves are in contact with several sets of fixed microneedles and several sets of movable microneedles.

10. The handheld medical skin roller with adjustable microneedle density according to claim 9, characterized in that: The inner wall of the limiting frame is fixedly connected to an injection tube, which is provided with several sets of injection heads. The outlet ends of the injection heads face the surfaces of the two sets of sponge absorbent sleeves. The top end of the injection tube is connected to a transmission tube, which is internally connected to the injection tube. Several sets of inlets are opened on the side wall of the transmission tube, and a sealing plug is fixedly connected to the top end of the transmission tube. An injection port is opened at the center of the bottom end of the handle. The injection port is movably fitted with the transmission tube, and the injection port is movably engaged with the sealing plug.

Images