A multi-channel scalp injection device

Abstract

The application provides a multi-channel scalp injection device, and belongs to the technical field of medical devices; the device comprises a main shell assembly, an angle adjusting mechanism, a push rod assembly, an injector, a clamping part and a depth limiting mechanism. The injector is a 1ml sterile injector which is detachably installed in a U-shaped groove formed on the outer side of the sleeve, and can meet the requirement of one use and one discard for PRP injection; the unified and accurate adjustment of the angles of each sleeve is realized by a first micro servo cylinder driving a connecting rod mechanism, the main push support is driven by a second micro servo cylinder to realize the synchronous full extraction of PRP liquid and the synchronous quantitative injection of multiple injectors, and the single-channel injection amount of a single time can be controlled to 0.05-0.1ml; the main push support is adaptively lifted for compensation during the angle adjusting process, which can ensure that the injection push rod has no misoperation; the depth adjusting assembly cooperates with a double-coordinate scale system to compensate for the depth deviation caused by the angle, and the depth control limiting sleeve can be replaced to adapt to different head types; and the efficiency, accuracy and safety of scalp PRP injection are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a multi-channel scalp injection device. Background Technology

[0002] Currently, in clinical and cosmetic medicine fields, scalp PRP injections are typically performed by doctors using a standard 1ml syringe. This method has several drawbacks: 1. Poor precision: It relies entirely on the doctor's feel, making it difficult to guarantee the consistency of needle insertion angle, depth and injection point spacing, which affects the treatment effect.

[0003] 2. Low efficiency: Single-needle injection to cover the entire scalp treatment area takes a long time, causing doctor fatigue and poor patient experience.

[0004] 3. High pain level: Repeated single-needle punctures are required to cover the entire treatment area, which requires dozens of punctures. Patients experience significant pain and have poor compliance.

[0005] 4. Poor repeatability: Due to the lack of standardized tools, the effects of different treatments or different doctors vary greatly.

[0006] Therefore, there is an urgent need in the field for a dedicated PRP scalp injection device that can solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-channel scalp injection device to solve the problems of poor accuracy, low efficiency, strong pain and poor repeatability in the prior art.

[0008] The objective of this invention is achieved through the following technical solution: a multi-channel scalp injection device, comprising a main shell assembly, an angle adjustment mechanism, a push rod assembly, and a syringe; The main housing assembly includes a main housing, the angle adjustment mechanism includes a first micro servo electric cylinder, the push rod assembly includes a push rod, and the syringe includes a U-shaped groove, a syringe barrel, and an injection push rod; The main housing has two rows of sleeves arranged in a linear array inside. The top of the main body of each sleeve has a push hole. The first micro servo electric cylinder can drive each sleeve to rotate synchronously. The push rod is slidably inserted into the push hole. The top of the inner part of the main housing is provided with a liftable main push support. Each sleeve in the same row is fixedly connected. A transverse connecting column is fixed between the tops of each push rod in the same row. The transverse connecting column is slidably connected in the guide groove of the main push support. The U-shaped groove is opened at the bottom of the main body of the sleeve and is connected to the push hole. When the piston at the head of the injection push rod is in the empty position, the syringe can be inserted into the U-shaped groove. At the same time, the end of the injection push rod is engaged with the bottom of the push rod. Furthermore, when the first micro servo electric cylinder drives each sleeve to synchronously adjust and change its angle, the main push guide can form an adaptive lifting and lowering adjustment.

[0009] The main shell assembly also includes a bottom connecting plate. The bottom outer bottom of the main shell is fixed with a pair of bottom fins. The bottom connecting plate is fixed between the bottom of the bottom fins. The bottom inner bottom of the main shell is fixed with a bottom plate. A vertical plate is fixed between the bottom connecting plate and the bottom plate. A middle plate is provided above the bottom plate. The middle plate is fixed to the inner wall of the main shell.

[0010] The angle adjustment mechanism also includes a rotating base and a connecting rod. The rotating base is fixedly installed in the vertical plate. An angle adjustment shaft is fixedly connected between the lower ends of each sleeve in the same row. The angle adjustment shaft on the same side is screwed into the rotating base. A connecting shaft is fixedly connected between the upper ends of each sleeve in the same row. A bushing is fixedly installed in the main body of the connecting rod. The connecting shaft on the same side is screwed into the bushing. A first solid cavity is fixedly connected to one side of the bottom of the outer wall of the main housing. A first solid shaft is inserted in the first solid cavity. The outer end of the main body of the first micro servo electric cylinder is screwed into the first solid shaft. The telescopic rod head of the first micro servo electric cylinder is screwed into an adjacent set of connecting shafts.

[0011] The push rod assembly also includes a U-shaped long strip seat, which is fixed to the top of the sleeve. Pushing slide columns are fixed to both outer walls of the top of the push rod. Pushing slide grooves are opened on both sides of the main body of the U-shaped long strip seat. Pushing slide columns on the same side are slidably connected in the pushing slide grooves. The transverse connecting column is fixed between the pushing slide columns in the same row and facing each other. The push rod assembly also includes a top seat, a top cover, and a second micro servo cylinder. The top two sides of the middle plate are fixedly connected to the main guide column. The two outer sides of the main push guide are fixedly installed with the main guide seat. The main guide seat on the same side is slidably connected to the main guide column. The top seat is fixedly connected between the top ends of the main guide column. The other side of the bottom of the outer wall of the main housing is fixedly connected to the second solid cavity. The second solid shaft is inserted transversely in the second solid cavity. The middle of the bottom end of the main push guide is fixedly connected to the intermediate seat. The bottom end of the main body of the second micro servo cylinder is screwed to the second solid shaft. The telescopic rod head of the second micro servo cylinder is screwed to the intermediate seat. The outer circular surface of each set of main guide columns is fitted with a compression spring. One end of the compression spring is fixed to the middle plate, and the other end is fixed to the main guide seat. The top cover is connected to the opening at the top of the main housing. The middle of the top end of the main push guide is fixedly connected to the connecting rod. The middle of the main body of the top seat has a connecting rod sliding hole. The connecting rod is slidably inserted into the connecting rod sliding hole. The push rod has a hollow structure, and each set of push rods has a tension spring connected to its inner bottom surface. The top of the tension spring is fixed to the inner top of the U-shaped long strip seat.

[0012] The syringe also includes a insertion groove, a docking semicircular seat, and a docking post. The insertion groove is formed in a U-shaped groove. The insertion seat is fixed to the outer wall of the end of the syringe. The syringe is locked in the U-shaped groove through the insertion engagement of the insertion seat and the insertion groove. An anti-torsion seat is also fixed to the outer wall of the syringe. A reference semicircular seat is fixed to the head end of the push rod. A docking hole is formed in the main body of the reference semicircular seat, and the center plane of the reference semicircular seat is directly opposite the side opening of the U-shaped groove. The docking semicircular seat is fixed to the end of the injection push rod, and the docking post is fixed to the center plane of the docking semicircular seat.

[0013] Furthermore, it also includes a snap-fit ​​part, which includes a snap-fit ​​slot, a buckle, a locking sleeve, and a support block. The snap-fit ​​slot is symmetrically opened at the lower end of the main body of the bottom fin. The top of the buckle is symmetrically fixed with a snap-fit ​​insert. The outer circular surface of the lower end of the bottom fin and the outer circular surface of the snap-fit ​​insert are both provided with snap-fit ​​external threads. The support block is evenly fixed to the outer side of the snap-fit ​​insert. The inner wall of the locking sleeve is provided with snap-fit ​​internal threads. The outer circular surface of the upper end of the bottom connecting plate is fixed with a limit block.

[0014] Furthermore, it also includes a depth limiting mechanism, which includes a fixed sleeve, a depth adjusting external thread, and a depth control limiting sleeve. The fixed sleeve is fixed to the bottom end of the buckle sleeve. The depth adjusting external thread is formed on the outer circular surface of the fixed sleeve. The inner wall of the depth control limiting sleeve is provided with a depth adjusting internal thread. The depth control limiting sleeve can form a mating connection with the depth adjusting external thread through the depth adjusting internal thread. The depth control limiting sleeve wraps each syringe within it. The bottom surface of the depth control limiting sleeve is provided with a scalp-fitting curved surface. The outer circular surface of the fixed sleeve with the depth adjusting external thread is provided with a dual-coordinate depth adjustment display scale.

[0015] By adopting the above technical solution, the present invention can achieve the following beneficial effects: (1) The present invention adapts to a standard 1ml sterile syringe through the detachable design of the syringe, which meets the sterile requirement of PRP injection for one-time use and one-time disposal. At the same time, the dual servo cylinder coordinated control formed by the first micro servo cylinder and the second micro servo cylinder overcomes the defects of traditional manual injection such as inconsistent angle, uncontrollable depth, inaccurate dosage and low efficiency of single channel. After being filled at once, the injection angle can be flexibly adjusted. During the angle adjustment process, the adaptive lifting compensation of the main push guide ensures zero error operation of PRP liquid volume. The single injection volume of a single channel can be accurately controlled within 0.05-0.1ml and the output of multiple channels is synchronous and equal, which significantly improves the efficiency, accuracy and safety of scalp PRP injection. (2) This invention achieves independent and precise adjustment of the injection angle and insertion depth through the cooperation of the snap-fit ​​part and the depth limiting mechanism; the snap-fit ​​part forms a rigid limit and fixation for the syringe by a detachable threaded locking method, eliminating the radial wobble of the syringe during injection; the depth limiting mechanism adjusts the depth by screwing the depth control sleeve and the fixing sleeve, and compensates for the depth deviation caused by the angle change by a dual-coordinate scale system with a dual-coordinate depth adjustment display scale. Furthermore, the scalp-contacting surface can be changed according to different head shapes and scalp area curvatures, ensuring that the needles of each syringe penetrate the scalp at the same depth at each point, effectively avoiding the problem of inconsistent depth caused by differences in scalp curvature, and further improving the depth accuracy and treatment uniformity of multi-channel synchronous injection. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main shell assembly of the present invention; Figure 3 This is a top view of the main shell assembly of the present invention; Figure 4 This is a cross-sectional view of the main shell assembly of the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the angle adjustment mechanism and the main shell assembly of the present invention; Figure 6 This is a schematic diagram of the structure of the first micro servo electric cylinder and connecting rod of the present invention; Figure 7 This is a schematic diagram of the push rod portion of the present invention; Figure 8 This is a schematic diagram of the transmission structure of the push rod assembly of the present invention; Figure 9 This is a schematic diagram of the main guide support part of the present invention; Figure 10 This is a schematic diagram of the structure of the transverse connecting column and the main push-guide brace of the present invention; Figure 11 This is a schematic diagram of the tension spring portion of the present invention; Figure 12 This is a schematic diagram of the syringe of the present invention; Figure 13 This is a schematic diagram of the structure of the snap-fit ​​part and the depth limiting mechanism of the present invention; Figure 14 This is an exploded view of the snap-fit ​​connector portion of the present invention; Figure 15 This is a schematic diagram of the card connector block portion of the present invention; Figure 16 This is a schematic diagram of how the present invention extracts PRP from a blood bag via a transfer tube.

[0018] Figure label: 1. Main shell assembly; 2. Angle adjustment mechanism; 3. Push rod assembly; 4. Syringe; 5. Snap-fit ​​part; 6. Depth limiting mechanism; 7. Adaptor tube; 101. Main shell; 102. Bottom fin; 103. Bottom connecting plate; 104. Vertical plate; 105. Bottom plate; 106. Middle plate; 201. Rotary seat; 202. Sleeve; 203. Connecting rod; 204. First fixed cavity; 205. First fixed shaft; 206. A miniature servo electric cylinder; 207, angle adjustment shaft; 208, connecting shaft; 209, bushing; 301, push hole; 302, U-shaped long strip seat; 303, push slide groove; 304, push rod; 305, push slide column; 306, transverse connecting column; 307, main guide column; 308, main push guide support; 309, main guide seat; 310, compression spring; 311, top seat; 312, top cover; 313, second fixing... Cavity; 314, Second fixed shaft; 315, Second miniature servo electric cylinder; 316, Transmitter seat; 317, Connecting rod; 318, Connecting rod sliding hole; 319, Tension spring; 401, U-shaped groove; 402, Syringe; 403, Insertion groove; 404, Insertion seat; 405, Anti-torsion seat; 406, Injection plunger; 407, Reference semi-circular seat; 408, Docking hole; 409, Docking semi-circular seat; 410, Docking Column; 501, Snap-fit ​​slot; 502, Clip sleeve; 503, Snap-fit ​​insert; 504, Snap-fit ​​external thread; 505, Locking sleeve; 506, Snap-fit ​​internal thread; 507, Support block; 508, Limiting block; 601, Fixing sleeve; 602, Depth adjustment external thread; 603, Dual-axis depth adjustment display scale; 604, Depth control limiting sleeve; 605, Depth adjustment internal thread; 606, Scalp-fitting curved surface. Detailed Implementation

[0019] 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.

[0020] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Example 1: This invention provides a synchronous angle adjustment for each syringe 4, and includes an example of injection. Figures 1-12 As shown; Inside the main housing 101 of the main housing assembly 1, sleeves 202 are screwed together in two rows of linear arrays. The top of the main body of each sleeve 202 has a push hole 301. The first micro servo electric cylinder 206 can drive each sleeve 202 to rotate synchronously. The push rod 304 is slidably inserted into the push hole 301. The top of the inner end of the main housing 101 is provided with a liftable main push guide 308. Each sleeve 202 in the same row is fixedly connected. A transverse connecting post 306 is fixedly connected between the tops of each push rod 304 in the same row. The transverse connecting post 306 is slidably connected in the guide groove of the main push guide 308. The U-shaped groove 401 is opened at the bottom of the main body of the sleeve 202 and communicates with the push hole 301. When the piston at the head of the injection push rod 406 is in the empty position, that is, when the piston at the head of the injection push rod 406 abuts against the bottom wall of the syringe 402, the syringe 402 can be locked into the U-shaped groove 401. At the same time, the end of the injection push rod 406 is locked into the bottom of the push rod 304. Furthermore, when the first micro servo electric cylinder 206 drives each sleeve 202 to synchronously adjust and change its angle, the main push guide 308 can form an adaptive lifting and lowering adjustment, so that during the process of the angle change of each sleeve 202, the sliding position of each push rod 304 relative to the sleeve 202 will not change, that is, the angle adjustment of the sleeve 202 will not cause the injection push rod 406 to malfunction.

[0022] The specific structures of the main shell assembly 1 and the angle adjustment mechanism 2 are as follows: Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, bottom fins 102 are fixed in pairs on the outer bottom of the main housing 101. A bottom connecting plate 103 is fixed between the bottom of the bottom fins 102 to provide lateral support. A bottom plate 105 is fixed to the inner bottom of the main housing 101. A vertical plate 104 is fixed between the bottom connecting plate 103 and the bottom plate 105. A middle plate 106 is provided above the bottom plate 105. The middle plate 106 is fixed to the inner wall of the main housing 101. A groove for the sleeve 202 to pass through is opened in the main body of the bottom plate 105. Rotary seats 201 are arranged and fixedly installed in the vertical plate 104. Angle adjustment shafts 207 are fixedly connected between the lower ends of each sleeve 202 in the same row. Angle adjustment shafts 207 on the same side are screwed into the rotary seats 201. Connecting shafts 208 are fixedly connected between the upper ends of each sleeve 202 in the same row. Bushings 209 are arranged and fixedly installed in the main body of the connecting rod 203. Connecting shafts 208 on the same side are screwed into the bushings 209. The spacing between adjacent rotary seats 201 is equal to the spacing between adjacent bushings 209. A first solid cavity 204 is fixedly connected to one side of the bottom of the outer wall of the main housing 101. A first solid shaft 205 is inserted laterally in the first solid cavity 204. The outer end of the main body of the first micro servo electric cylinder 206 is screwed to the first solid shaft 205. The telescopic rod head of the first micro servo electric cylinder 206 is screwed to an adjacent set of connecting shafts 208. One end of the main body of the connecting rod 203 is provided with a groove to eliminate interference with the telescopic rod of the first micro servo electric cylinder 206. The inner cavity of the first solid cavity 204 can accommodate the first micro servo electric cylinder 206 to form a driving action. The main housing 101 is equipped with a control system. The first micro servo cylinder 206 is connected to the control system. When the control system starts the first micro servo cylinder 206, the movement of the telescopic rod of the first micro servo cylinder 206, in conjunction with the hinge between the main body of the first micro servo cylinder 206 and the first fixed shaft 205, pushes and pulls the connecting shaft 208. Since the bottom of the sleeve 202 is restricted to the rotary seat 201 by the angle adjustment shaft 207, the push and pull action formed by the telescopic rod of the first micro servo cylinder 206 will force the sleeve 202 to rotate around the angle adjustment shaft 207, thereby achieving uniform and precise adjustment of the angle of each sleeve 202.

[0023] The specific structures of the push rod assembly 3 and the syringe 4 are as follows: Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the U-shaped long strip seat 302 is fixed to the top of the sleeve 202, and the two outer walls of the top of the push rod 304 are fixed with push sliding columns 305. Push sliding grooves 303 are opened on both sides of the main body of the U-shaped long strip seat 302. The push sliding columns 305 on the same side are slidably connected in the push sliding grooves 303. The transverse connecting column 306 is fixed between the push sliding columns 305 in the same row and facing each other. The top two sides of the middle plate 106 are fixedly connected to the main column 307, and the two outer sides of the main push guide 308 are fixedly installed with the main seat 309. The main seat 309 on the same side is slidably connected to the main column 307, and the top seat 311 is fixedly connected to the top of the main column 307. A second solid cavity 313 is fixedly connected to the other side of the bottom of the outer wall of the main housing 101. A second solid shaft 314 is inserted transversely in the second solid cavity 313. A central pivot 316 is fixedly connected to the middle of the bottom end of the main push guide 308. The bottom end of the main body of the second micro servo electric cylinder 315 is screwed to the second solid shaft 314. The telescopic rod head of the second micro servo electric cylinder 315 is screwed to the central pivot 316. Each set of main guide columns 307 has a compression spring 310 fitted on its outer circular surface. One end of the compression spring 310 is fixed to the middle plate 106 and the other end is fixed to the main guide seat 309. It can provide the main push guide support 308 with an upward support elastic force in a free state and form a balance with the thrust of the second micro servo electric cylinder 315. The second micro servo electric cylinder 315 is also connected to the control system. When the control system starts the second micro servo electric cylinder 315, the movement of the telescopic rod of the second micro servo electric cylinder 315, in conjunction with the hinge between the main body of the second micro servo electric cylinder 315 and the second fixed shaft 314, can realize the movement of the main push guide 308 guided by the sliding engagement of the main guide seat 309 and the main guide column 307, ensuring that the main push guide 308 does not tilt or rotate during the lifting process. The top cover 312 is attached to the opening at the top of the main housing 101. A connecting rod 317 is fixedly connected to the middle of the top of the main push guide 308. A connecting rod sliding hole 318 is opened in the middle of the main body of the top seat 311. The connecting rod 317 is slidably inserted into the connecting rod sliding hole 318. The sliding cooperation between the connecting rod 317 and the connecting rod sliding hole 318 provides guidance in the middle of the main push guide 308. Together with the guidance of the main guide columns 307 on both sides and the main guide seat 309, a three-point constraint is formed, which effectively prevents the main push guide 308 from deflecting or twisting during the lifting and lowering process, and ensures the linearity of the movement. The connecting rod 317 is exposed at the top of the main housing 101. In the event of a single control system failure, the operator can directly press down or lift the connecting rod 317 to drive the main push guide 308 to achieve emergency injection or reset. Furthermore, the exposed length of the main shell assembly 17 changes in real time as the main push guide 308 rises and falls, allowing the operator to intuitively judge the current liquid extraction position, the remaining liquid volume, and the injection progress. The push rod 304 has a hollow structure. Each push rod 304 has a tension spring 319 connected to its inner bottom surface. The top of the tension spring 319 is fixed to the inner top of the U-shaped long strip seat 302, which can ensure that the push rod 304 always has an upward tension. The needle at the tip of syringe 402 is a detachable 34G ultrafine needle; The insertion slot 403 is formed in the U-shaped groove 401. The outer wall of the end of the syringe 402 is fixedly connected to the insertion seat 404. The syringe 402 is placed in the U-shaped groove 401 through the insertion engagement of the insertion seat 404 and the insertion slot 403. The outer wall of the syringe 402 is also fixedly connected to the anti-torsion seat 405. The contour formed by the anti-torsion seat 405 and the syringe 402 matches the contour of the U-shaped groove 401, which can prevent the syringe 402 from torturing after installation. The head end of the push rod 304 is fixedly connected to a reference semicircular seat 407. The main body of the reference semicircular seat 407 is provided with a docking hole 408, and the central plane of the reference semicircular seat 407 is directly opposite to the side opening of the U-shaped groove 401. The docking semicircular seat 409 is fixedly connected to the end of the injection push rod 406, and the docking post 410 is fixedly connected to the central plane of the docking semicircular seat 409. When the injection plunger 406 is in the empty limit position and the push rod 304 is in the lower limit position, after the connector 404 is inserted into the connector slot 403, the docking post 410 is inserted into the docking hole 408, and the center plane of the docking semicircular seat 409 is flush with the center plane of the reference semicircular seat 407, which allows the syringe 402 to be stably locked in the U-shaped groove 401, while the end of the injection plunger 406 is securely locked with the bottom end of the push rod 304.

[0024] The working principle is as follows: The syringe 4 is loaded in an empty state, and the push rod 304 is at its lower limit position. The operator first pushes the injection plunger 406 to the position where the piston at the tip abuts against the bottom wall of the syringe 402, at which point the syringe 402 is emptied. Then, each syringe 402 is inserted laterally into the opening of the U-shaped groove 401 at the bottom of the sleeve 202, so that the syringe 402 is placed in the U-shaped groove 401. At the same time, the end of the injection plunger 406 is engaged with the bottom end of the push rod 304, completing the positioning and installation of each syringe 402 and the injection plunger 406. After loading is completed, the control system starts the second micro servo electric cylinder 315 to pull back, and pulls the main push guide 308 upward along the main guide column 307 via the central pivot 316. The main push guide 308 drives each push rod 304 and injection push rod 406 to move upward via the transverse connecting column 306 and the push slide column 305, and then moves downward again to the limit, ensuring that the piston at the head end of each injection push rod 406 is precisely in contact with the bottom wall of the syringe 402, eliminating manual loading deviation, and uniformly calibrating to the correct initial emptying position; During loading, the needles are not inserted. After loading, the operator connects the four ends of each syringe to the outlets of the multi-inlet adapter 7. The inlet of the adapter 7 is connected to the blood bag. The operator then activates the second micro servo cylinder 315 through the control system, causing its telescopic rod to retract upwards. The bottom end of the main body of the second micro servo cylinder 315 is hinged to the second fixed cavity 313 via the second fixed shaft 314. The head end of its telescopic rod is hinged to the central rotating seat 316. When the telescopic rod retracts upwards, it pulls the central rotating seat 316, which in turn drives the main pusher. The main pusher 308 slides upward along the main guide column 307. The main pusher 308 drives the transverse connecting column 306 to move upward. The transverse connecting column 306 pulls the pusher slide columns 305 on both sides to slide upward along the pusher slide groove 303. The pusher slide column 305 drives the pusher rod 304 to slide upward along the pusher hole 301. The bottom end of the pusher rod 304 pulls the end of the locked injection pusher 406 to move upward. The piston at the head end of the injection pusher 406 moves upward in the syringe 402, forming a negative pressure, and quantitatively drawing PRP liquid into each syringe 402. Since each push rod 304 is rigidly connected to the main push guide 308 through the transverse connecting column 306, the upward movement of the main push guide 308 can synchronously drive all the injection push rods 406 to perform retraction, so that each 1 ml syringe 402 can be filled synchronously in one operation; the control system precisely controls the retraction stroke of the second micro servo cylinder 315 so that each syringe 402 is filled to the 1 ml mark. During this process, the compression spring 310 sleeved on the outer circular surface of the main column 307 is further compressed to store energy, and the tension spring 319 inside the push rod 304 is further stretched to store energy. The two are respectively used to store elastic potential energy for subsequent reset and injection propulsion strokes. After the PRP solution is extracted, the operator closes the blood bag outlet valve and separates each outlet of the transfer tube 7 from the syringe tip 4. The transfer tube 7 is disposed of as a disposable consumable. The blood bag has a capacity of 10 to 20 ml. In a single treatment, multiple cycles of aspiration and injection are required to gradually use up the PRP solution. After the treatment, the blood bag is disposed of as medical waste. The blood bag is equipped with a volume scale, and the operator visually confirms the remaining fluid volume before each round of aspiration. When the remaining fluid volume is insufficient to fill the 1ml capacity of each syringe 402, the operator sets the reduced aspiration stroke of the second micro servo electric cylinder 315 for that round of aspiration according to the remaining fluid volume. The control system executes aspiration according to the reduced stroke, so that each syringe 402 stops after drawing the fluid volume corresponding to the remaining fluid volume, which avoids the intake of air and minimizes the waste of PRP fluid. Then, needles are installed at the tip of each syringe 402, and the operator positions the device above the scalp; according to the anatomical morphology of the target injection area, the control system activates the first micro servo cylinder 206 to adjust the angle. The telescopic rod of the first micro servo electric cylinder 206 generates a linear motion of extending or retracting. Since the main body of the first micro servo electric cylinder 206 is hinged and constrained by the first fixed shaft 205, the linear motion of the telescopic rod is converted into a pushing and pulling force on the connecting shaft 208, realizing the synchronous displacement of each connecting shaft 208. Since the bottom of the sleeve 202 is constrained to the rotary seat 201 via the angle adjustment shaft 207, the displacement of the connecting shaft 208 forces the sleeve 202 to rotate around the angle adjustment shaft 207, realizing the uniform and precise adjustment of the angle of each sleeve 202. The sleeve 202 can be adjusted in multiple positions (such as 45°, 60°, 75°, 90°) within the range of 45° to 90°, and locked. During angle adjustment, the control system synchronously activates the second micro servo electric cylinder 315 to drive the main push guide 308 to adaptively lift and lower, compensating for the vertical displacement of the push rod 304 caused by the rotation of the sleeve 202, so that the sliding displacement of the push rod 304 relative to the sleeve 202 remains unchanged, and the injection push rod 406 does not produce misoperation. After the angle adjustment is locked, the operating device positions the device above the target area of ​​the scalp and presses it down, so that the needles at the tips of each syringe 402 are simultaneously inserted into the scalp at a set angle to a predetermined depth; the control system controls the second micro servo cylinder 315 to slightly retract and move the telescopic rod, which pushes the main push guide 308 down along the main guide column 307 via the central pivot 316. The main push guide 308 pushes the push slide column 305 down along the push slide groove 303 via the transverse connecting column 306. The push slide column 305 drives the push rod 304 along the push slide groove 303. The orifice 301 slides down, and the push rod 304 pushes the injection push rod 406 down, so that the PRP liquid in the syringe 402 is discharged through the needle to complete the injection; the control system precisely controls the single stroke of the second micro servo electric cylinder 315, controlling the single injection volume of a single syringe 402 to 0.05-0.1ml, and all syringes 402 inject the same volume synchronously; after a single injection, it moves to the next point and repeats the operation. Each 1ml syringe 402 can support 10-20 points; the angle can be readjusted midway, and the compensation mechanism ensures that the remaining liquid volume is not affected; Both the first micro servo electric cylinder 206 and the second micro servo electric cylinder 315 are micro servo electric cylinders with built-in displacement sensors to achieve closed-loop position control. The control system can accurately set and feedback the real-time stroke position of their telescopic rods. For the first micro servo electric cylinder 206, the control system calculates the required telescopic rod stroke based on the target injection angle, drives the telescopic rod of the first micro servo electric cylinder 206 to generate a corresponding push-pull displacement, which is rigidly transmitted to each sleeve 202 through the connecting rod 203 and the bushing 209. Since the rotation angle of each sleeve 202 around the angle adjustment shaft 207 has a definite geometric mapping relationship with the telescopic rod stroke of the first micro servo electric cylinder 206, the precise setting and synchronous adjustment of the angle of each sleeve 202 can be achieved by controlling the stroke of the first micro servo electric cylinder 206. For the second micro servo cylinder 315, the stroke of its telescopic rod has a definite transmission ratio relationship with the axial displacement of the push rod 304. The axial displacement of the push rod 304 directly determines the advancing distance of the piston of the injection push rod 406 in the syringe 402. That is, the injection volume is linearly corresponding to the stroke of the telescopic rod of the second micro servo cylinder 315. The control system has a pre-stored conversion relationship between the stroke and the dose of a 1ml syringe 402. By precisely setting the single downward stroke of the second micro servo cylinder 315, the single injection volume of a single channel can be continuously adjusted within the range of 0.05-0.1ml. At the same time, during the angle adjustment process, the control system calculates the vertical displacement of the top of the push rod 304 based on the real-time stroke of the first micro servo cylinder 206, and synchronously controls the second micro servo cylinder 315 to generate an equal amount of compensation stroke to ensure compensation accuracy.

[0025] Example 2: Based on Example 1, the present invention provides an example of adjusting and controlling the injection depth. Figure 1 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown; The snap-fit ​​slots 501 in the snap-fit ​​part 5 are symmetrically opened at the lower end of the main body of the bottom fin 102. The snap-fit ​​plug 503 is symmetrically fixed at the top of the buckle 502. The outer circular surface of the lower end of the bottom fin 102 and the outer circular surface of the snap-fit ​​plug 503 are both provided with snap-fit ​​external threads 504. The support block 507 is evenly fixed to the outer side of the snap-fit ​​plug 503, the inner wall of the locking sleeve 505 is provided with snap-fit ​​internal thread 506, and the outer circular surface of the upper end of the bottom connecting plate 103 is fixed with a limit block 508. The snap-fit ​​plug 503 on the same side can be inserted into the snap-fit ​​slot 501. After the snap-fit ​​plug 503 is inserted into place, the snap-fit ​​external thread 504 on the outer circular surface of the snap-fit ​​plug 503 and the snap-fit ​​external thread 504 on the outer circular surface of the bottom fin 102 form the same path of thread. At this time, the inner side of the snap-fit ​​plug 503 is flat against the outer side of the sleeve 202 and the anti-torsion seat 405, which can form a fitting limit on the outside of the syringe 402. The locking sleeve 505 forms a threaded connection with the locking insert 503 and the bottom fin 102 through the locking internal thread 506 and the locking external thread 504 on the outer surface of the locking insert 503 and the locking external thread 504 on the outer surface of the bottom fin 102, forming the same path. This can form a detachable fixed connection between the component formed by the locking sleeve 502, the locking insert 503 and the support block 507 and the bottom fin 102. The support block 507 is used to support the inner wall of the locking sleeve 505 without affecting the engagement of the internal thread 506 and the external thread 504. The limiting block 508 is used to limit the tightening position of the locking sleeve 505. The main body of the buckle 502 also has notches on both sides to eliminate interference with the bottom connecting plate 103; The fixed sleeve 601 in the depth limiting mechanism 6 is fixed to the bottom end of the buckle 502. The depth adjustment external thread 602 is opened on the outer circular surface of the fixed sleeve 601. The inner wall of the depth control limiting sleeve 604 is provided with the depth adjustment internal thread 605. The depth control limiting sleeve 604 can form a mating connection with the depth adjustment external thread 602 through the depth adjustment internal thread 605. The depth control limiting sleeve 604 can wrap each syringe 402 in it. The bottom surface of the depth control limiting sleeve 604 is provided with the scalp-fitting curved surface 606. The outer circular surface of the fixed sleeve 601 with the external thread 602 for depth adjustment is provided with a dual-coordinate depth adjustment display scale 603, which can indicate the thread adjustment of the depth control limit sleeve 604 relative to the fixed sleeve 601. This allows the depth control limit sleeve 604 to be adjusted to different height positions relative to the bottom surface of the fixed sleeve 601. Since the length of the syringe 402 remains unchanged, when the depth control limit sleeve 604 is adjusted in height relative to the bottom surface of the fixed sleeve 601, the extension length of the needle tip of the syringe 402 relative to the scalp-fitting curved surface 606 can be limited. The scalp-fitting curved surface 606 on the bottom surface of the depth control limit sleeve 604 is designed to adapt to the head-fitting curvature of a certain head shape. Furthermore, the depth control limit sleeve 604 can be replaced according to the curvature of different head shapes or different curvature areas of the scalp to achieve a perfect fit to the scalp. When the sleeve 202 rotates around the angle adjustment shaft 207, the needle tip of the syringe 402 moves in an arc around a certain radius, resulting in a vertical displacement. However, after the depth control sleeve 604 is screwed to the set position, the scalp-contact surface 606 remains fixed, causing deviations in the needle extension length at different angles. Therefore, the dual-coordinate depth adjustment display scale 603 uses a dual-coordinate scale system. The main scale indicates the target injection depth (e.g., 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm), and the secondary scale indicates the corresponding compensation offset in angle increments. In use, the user first screws the depth control sleeve 604 to the target depth value on the main scale, then reads the corresponding offset on the secondary scale according to the current injection angle, and fine-tunes the depth control sleeve 604 to that offset position. This completes the depth calibration after angle compensation without additional calculations. Furthermore, since the curvature variation range of the scalp-contacting curved surface 606 of the different depth control limit sleeves 604 is limited, and the reference of the dual-coordinate depth adjustment display scale 603 remains unchanged, the change in the injection limit of the syringe 402 caused by changing the depth control limit sleeve 604 is very limited and does not affect the final treatment effect. After treatment, the operator unscrews and removes the locking sleeve 505, detaching the locking part 5 along with the depth limiting mechanism 6 from the main housing 101. Then, the emptied syringes 402 along with the injection plunger 406 are removed from the U-shaped groove 401 of the sleeve 202 and disposed of as medical waste according to aseptic procedures, meeting the aseptic requirement of PRP being used and discarded once. During treatment, the scalp-adhering curved surface 606 on the bottom of the depth control sleeve 604 adheres to the scalp and may come into contact with scalp bleeding; therefore, blood may be present on the surface of the scalp-adhering curved surface 606. To mitigate the risk of blood contamination, the depth control sleeve 604 must be discarded. Components such as the buckle sleeve 502, snap-fit ​​block 503, support block 507, locking sleeve 505, snap-fit ​​slot 501, bottom fin 102, and the fixing sleeve 601 of the depth limiting mechanism 6 do not directly contact blood and can be wiped with surface disinfection. The internal transmission mechanisms of the main shell assembly 1, angle adjustment mechanism 2, and push rod assembly 3 are located within a closed shell and do not require direct sterilization. For the next round of treatment, simply reload a new 1ml sterile syringe 402 and injection push rod 406 for use.

[0026] Furthermore, it should be noted that the installation positions of each syringe 402 within the sleeve 202 are uniformly fixed, with the needle tips in the same plane. Since the scalp is curved, theoretically, this would lead to differences in the insertion depth of the needles in each channel. However, in actual operation, the device only applies to a local area of ​​the scalp each time. Within this local area, the curvature of the scalp surface is extremely small and can be approximated as a plane. The distance difference between each needle and the scalp is negligible. In addition, the scalp application surface 606 is customized according to the curvature of the target scalp area, thus achieving a preliminary adaptation to the local curvature during application, making the contact reference surface between each needle and the scalp more consistent. Therefore, within the local injection area of ​​a single application, the difference in the insertion depth of each needle is minimal and does not affect the effective delivery of PRP at the target layer or the final treatment effect.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-channel scalp injection device, comprising a main housing assembly (1), characterized in that: It also includes an angle adjustment mechanism (2), a push rod assembly (3), and a syringe (4); The main housing assembly (1) includes a main housing (101), the angle adjustment mechanism (2) includes a first micro servo electric cylinder (206), the push rod assembly (3) includes a push rod (304), and the syringe (4) includes a U-shaped groove (401), a syringe (402), and an injection push rod (406). The main housing (101) has two rows of sleeves (202) arranged in a linear array inside. The top of the main body of the sleeve (202) is provided with a push hole (301). The first micro servo electric cylinder (206) can drive each sleeve (202) to rotate synchronously. The push rod (304) is slidably inserted in the push hole (301). The top of the inner end of the main housing (101) is provided with a liftable main push guide (308). Each sleeve (202) in the same row is fixedly connected. A transverse connecting column (306) is fixed between the top ends of each push rod (304) in the same row. The transverse connecting column (306) is slidably connected in the guide groove of the main push guide (308). The U-shaped groove (401) is opened at the bottom of the main body of the sleeve (202) and is connected to the push hole (301). When the piston at the head end of the injection push rod (406) is in the empty position, the syringe (402) can be inserted into the U-shaped groove (401). At the same time, the end of the injection push rod (406) is engaged with the bottom end of the push rod (304). Furthermore, when the first micro servo electric cylinder (206) drives each sleeve (202) to synchronously adjust and change its angle, the main push guide (308) can form an adaptive lifting adjustment.

2. The multi-channel scalp injection device according to claim 1, characterized in that: The main shell assembly (1) also includes a bottom connecting plate (103). The bottom of the main shell (101) is fixed with a pair of bottom fins (102). The bottom connecting plate (103) is fixed between the bottom of the bottom fins (102). The bottom of the main shell (101) is fixed with a bottom plate (105). A vertical plate (104) is fixed between the bottom connecting plate (103) and the bottom plate (105). A middle plate (106) is provided above the bottom plate (105). The middle plate (106) is fixed to the inner wall of the main shell (101).

3. The multi-channel scalp injection device according to claim 2, characterized in that: The angle adjustment mechanism (2) also includes a rotating base (201) and a connecting rod (203). The rotating base (201) is arranged and fixedly installed in the vertical plate (104). Angle adjustment shafts (207) are fixedly connected between the lower ends of each sleeve (202) in the same row. The angle adjustment shafts (207) on the same side are screwed into the rotating base (201). A connecting shaft (208) is fixedly connected between the upper ends of each sleeve (202) in the same row. The connecting rod (203) is arranged and fixedly installed in the main body. A bushing (209) is installed, and a connecting shaft (208) on the same side is screwed into the bushing (209). A first solid cavity (204) is fixed to one side of the bottom of the outer wall of the main housing (101). A first solid shaft (205) is inserted in the first solid cavity (204). The outer end of the main body of the first micro servo electric cylinder (206) is screwed to the first solid shaft (205). The telescopic rod head of the first micro servo electric cylinder (206) is screwed to an adjacent set of connecting shafts (208).

4. A multi-channel scalp injection device according to claim 2 or 3, characterized in that: The push rod assembly (3) also includes a U-shaped long strip seat (302), which is fixed to the top of the sleeve (202). Pushing slides (305) are fixed to both outer walls of the top of the push rod (304). Pushing grooves (303) are provided on both sides of the main body of the U-shaped long strip seat (302). Pushing slides (305) on the same side are slidably connected in the pushing grooves (303). The transverse connecting column (306) is fixed between the pushing slides (305) in the same row and facing each other.

5. A multi-channel scalp injection device according to claim 4, characterized in that: The push rod assembly (3) also includes a top seat (311), a top cover (312), and a second micro servo electric cylinder (315). A main guide column (307) is fixedly connected to both sides of the top of the middle plate (106). A main guide seat (309) is fixedly installed on both outer sides of the main push guide (308). The main guide seat (309) on the same side is slidably connected to the main guide column (307). The top seat (311) is fixedly connected between the top ends of the main guide column (307). A second fixed cavity (313) is fixedly connected to the other side of the bottom of the outer wall of the main housing (101). A second fixed shaft (314) is inserted laterally in the second fixed cavity (313). A transfer seat (316) is fixedly connected to the middle of the bottom end of the main push guide (308). The bottom of the main body of the micro servo electric cylinder (315) is screwed to the second fixed shaft (314). The telescopic rod head of the second micro servo electric cylinder (315) is screwed to the central rotating seat (316). Each set of main columns (307) has a compression spring (310) sleeved on its outer circular surface. One end of the compression spring (310) is fixed to the middle plate (106), and the other end is fixed to the main seat (309). The top cover (312) is attached to the opening at the top of the main housing (101). The top center of the main push guide (308) is fixed with a connecting rod (317). The main body of the top seat (311) has a connecting rod sliding hole (318) in the middle. The connecting rod (317) is slidably inserted into the connecting rod sliding hole (318).

6. A multi-channel scalp injection device according to claim 5, characterized in that: The push rod (304) is a hollow structure. Each push rod (304) has a tension spring (319) connected to its inner bottom surface. The top of the tension spring (319) is fixed to the inner top of the U-shaped long strip seat (302).

7. A multi-channel scalp injection device according to claim 1, 2, 3, 5 or 6, characterized in that: The syringe (4) also includes a insertion groove (403), a docking semicircular seat (409), and a docking post (410). The insertion groove (403) is formed in a U-shaped groove (401). The outer wall of the end of the syringe (402) is fixedly connected to a insertion seat (404). The syringe (402) is placed in the U-shaped groove (401) through the insertion engagement of the insertion seat (404) and the insertion groove (403). The outer wall of the syringe (402) is also fixedly connected to an anti-twist device. The head end of the rotating seat (405) and the push rod (304) is fixedly connected to the reference semicircular seat (407). The main body of the reference semicircular seat (407) is provided with a docking hole (408), and the center plane of the reference semicircular seat (407) is directly opposite to the side opening of the U-shaped groove (401). The docking semicircular seat (409) is fixedly connected to the end of the injection push rod (406), and the docking post (410) is fixedly connected to the center plane of the docking semicircular seat (409).

8. A multi-channel scalp injection device according to claim 2, 3, 5 or 6, characterized in that: It also includes a snap-fit ​​part (5), which includes a snap-fit ​​slot (501), a buckle (502), a locking sleeve (505) and a support block (507). The snap-fit ​​slot (501) is symmetrically opened at the lower end of the main body of the bottom fin (102). The top of the buckle (502) is symmetrically fixed with a snap-fit ​​plug (503). The outer circular surface of the lower end of the bottom fin (102) and the outer circular surface of the snap-fit ​​plug (503) are both provided with snap-fit ​​external threads (504). The support block (507) is evenly fixed to the outer side of the snap-fit ​​plug (503). The inner wall of the locking sleeve (505) is provided with snap-fit ​​internal threads (506). The outer circular surface of the upper end of the bottom connecting plate (103) is fixed with a limit block (508).

9. A multi-channel scalp injection device according to claim 8, characterized in that: It also includes a depth limiting mechanism (6), which includes a fixed sleeve (601), a depth adjusting external thread (602), and a depth control limiting sleeve (604). The fixed sleeve (601) is fixed to the bottom end of the buckle sleeve (502). The depth adjusting external thread (602) is formed on the outer circular surface of the fixed sleeve (601). The inner wall of the depth control limiting sleeve (604) is provided with a depth adjusting internal thread (605). The depth control limiting sleeve (604) can form a mating connection with the depth adjusting external thread (602) through the depth adjusting internal thread (605). The depth control limiting sleeve (604) encloses each syringe (402) within it. The bottom surface of the depth control sleeve (604) is provided with a scalp-fitting curved surface (606), and the outer circular surface of the fixed sleeve (601) with the depth adjustment external thread (602) is provided with a dual-coordinate depth adjustment display scale (603).

Images