Microneedle treatment device for scar resolution

Abstract

This invention relates to the field of medical aesthetic instruments and provides a microneedle treatment device for scar reduction, comprising a main unit and a treatment head. Multiple evenly distributed microneedles are fixedly mounted on a carrier plate, which has multiple needle exit holes penetrating the plate. The ends of the microneedles extend into the needle exit holes, and multiple lateral grooves are formed on the inner side of each needle exit hole, penetrating the carrier plate. A driving mechanism is provided within the cavity to drive the microneedles in reciprocating motion. Negative pressure grooves are distributed on the outer side of the end plate. A negative pressure mechanism is installed on the treatment head to draw air from the cavity and create negative pressure at the negative pressure grooves and lateral grooves. By setting the negative pressure mechanism to create negative pressure within the cavity, and by using the negative pressure grooves on the end plate to locally adhere and tighten the skin in the treatment area, skin slippage is effectively prevented, significantly improving the verticality and consistency of microneedle puncture and reducing the risk of needle slippage, deviation, or unexpected damage.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical and cosmetic instruments, and particularly relates to a microneedle treatment device for scar regression. BACKGROUND

[0002] As a minimally invasive and efficient skin repair technology, microneedle treatment has shown broad application prospects in the fields of scar repair, skin regeneration and transdermal drug delivery in recent years. Its core mechanism lies in the use of a micrometer-scale needle array to form a large number of controllable microchannels in the stratum corneum. On the one hand, it can physically stimulate the dermis to start the wound repair response and promote the neogenesis and rearrangement of collagen and elastic fibers. On the other hand, it can significantly enhance the transdermal absorption efficiency of exogenous active ingredients, thereby synergistically improving the texture, color and flatness of scar tissue.

[0003] However, when performing clinical operations on complex types such as hypertrophic scars, atrophic scars or contracture scars, problems such as uneven skin surface, abnormal local tension or significantly reduced tissue elasticity often occur. During the process of applying microneedle puncture in such areas, the skin is prone to sliding, rebounding or local deformation due to external force, resulting in the microneedle failing to accurately penetrate along the preset vertical direction, and the phenomenon of "sliding needle" or "inclined puncture" occurs. Such non-ideal puncture not only weakens the uniformity and depth consistency of the microchannels formed, affecting the repeatability of the treatment effect, but also may cause adverse reactions such as tearing of the epidermis, rupture of capillaries, bleeding and even secondary infection. Therefore, it is necessary to design a microneedle treatment device for scar regression. SUMMARY

[0004] The present application provides a microneedle treatment device for scar regression to solve the problem that the existing microneedle treatment device is prone to sliding or inclined puncture due to uneven skin during treatment, affecting the treatment effect and causing adverse reactions.

[0005] The present application is implemented as follows: a microneedle treatment device for scar regression, comprising a host and a treatment head, the treatment head is electrically connected with the host through a flexible cable, a cavity is formed in the front end of the treatment head, an end plate is fixedly installed at the end of the treatment head, the end plate is used for plugging the cavity, a carrier plate is slidably installed in the cavity, a plurality of elastic sheets are fixedly connected to the carrier plate, the elastic sheets are fixedly connected with the treatment head, a plurality of microneedles are fixedly installed on the carrier plate and are uniformly distributed, a plurality of needle outlet holes are formed in the carrier plate, the needle outlet holes all penetrate the carrier plate, the end of the microneedle extends into the needle outlet hole, a plurality of side grooves are formed in the inner side of the needle outlet hole, and the side grooves penetrate the carrier plate.

[0006] The cavity is equipped with a driving mechanism, which drives the microneedles to reciprocate. The front end of the treatment head has multiple negative pressure grooves arranged in a circumferential array. The negative pressure grooves are all distributed on the outside of the end plate. One end of the negative pressure groove extends into the treatment head and communicates with the cavity. The treatment head is equipped with a negative pressure mechanism, which is used to draw air from the cavity and generate negative pressure at the negative pressure grooves and side grooves.

[0007] Preferably, the driving mechanism includes an electromagnet fixedly installed inside the treatment head, a connecting frame fixedly installed at the bottom of the carrier plate, a magnet fixedly installed at the lower end of the connecting frame, the magnet being positioned facing the electromagnet, and the electromagnet generating a repulsive force on the magnet when energized.

[0008] Preferably, the negative pressure mechanism includes a channel formed inside the treatment head, an installation port is provided on one side of the treatment head, a miniature negative pressure pump is fixedly installed in the installation port, one end of the channel is connected to the air inlet pipe of the miniature negative pressure pump, and the other end of the channel is connected to a cavity.

[0009] Preferably, the installation port is provided with a cover, which is installed on the treatment head and used to seal the installation port, and the exhaust pipe of the miniature negative pressure pump passes through the cover and is connected to the outside.

[0010] Preferably, the cavity is provided with an inner tube fixedly mounted on an end plate. The end plate is a good thermal conductor. Multiple coaxially arranged annular cavities are opened in the end plate. Adjacent annular cavities are connected by perforations. The perforations are opened in the end plate. The innermost annular cavity is connected to the inner tube. An outer tube is fixedly mounted on the carrier plate. One end of the outer tube is sleeved outside the inner tube, and the two are slidably connected. The contact surface between the inner tube and the outer tube is sealed. The carrier plate is an annular carrier plate. The inner cavity of the carrier plate, the outer tube, the inner tube, the multiple annular cavities and the perforations are in a connected state, and all are filled with coolant. A thermoelectric cooling chip is fixedly mounted on the carrier plate. The cold end of the thermoelectric cooling chip faces the inner cavity of the carrier plate and absorbs heat from the coolant.

[0011] Preferably, the outer tube is provided with a guide vane that extends into the inner tube. One end of the guide vane is rotatably mounted on and through the thermoelectric cooling chip. The contact surface between the guide vane and the thermoelectric cooling chip is sealed. A heat insulation cover is fixedly mounted on the hot end of the thermoelectric cooling chip. A micro motor is provided inside the heat insulation cover. The output shaft of the micro motor is fixedly connected to the guide vane. The micro motor is used to drive the guide vane to rotate.

[0012] Preferably, the treatment head is fitted with and fixedly mounted with an annular portion, and the main unit is equipped with a support mechanism for supporting the treatment head and the cable.

[0013] Preferably, the support mechanism includes a bracket fixedly mounted on the host, the upper end of the bracket having a groove, the treatment head being placed in the groove and the bracket limiting the annular portion.

[0014] Preferably, a guide wheel is fixedly mounted on the bracket, and the cable is placed on the guide wheel.

[0015] Preferably, casters are installed at all four corners of the bottom of the main unit.

[0016] Compared with related technologies, the microneedle treatment device for scar reduction provided by the present invention has the following beneficial effects:

[0017] 1. By setting a negative pressure mechanism to create negative pressure in the cavity, and by using the negative pressure groove on the end plate to locally adsorb and tighten the skin in the treatment area, the skin slippage is effectively prevented, the verticality and consistency of microneedle puncture are significantly improved, and the risk of needle slippage, deviation or unexpected damage is reduced.

[0018] 2. The lateral grooves on the carrier plate exert a local traction effect on the tissue around the puncture point under negative pressure, which moderately stretches and loosens the dense scar tissue, helping the microneedle to penetrate more smoothly. The negative pressure environment not only assists microneedle puncture, but also enhances the penetration efficiency of subsequent topical drugs or active ingredients into the subcutaneous tissue through the microchannels. The negative pressure can simultaneously absorb the trace amounts of tissue fluid, blood or exudate generated during the puncture process, reducing the risk of infection, maintaining a clear treatment interface, and facilitating continuous operation and postoperative recovery.

[0019] 3. By setting up a closed-loop cooling channel at the front end of the treatment head, consisting of an inner tube, an outer tube, a ring cavity, and a carrier plate, and combining it with a thermoelectric cooling pad to directly cool the coolant, the temperature of the microneedle puncture area can be rapidly and accurately reduced, effectively inhibiting the nerve endings' perception of pain and improving patient comfort. Forced convection circulation continuously removes heat, effectively controlling the temperature of the microneedles and surrounding tissues, preventing heat accumulation, and ensuring treatment safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is an enlarged schematic diagram of a portion of the structure of the treatment head and cable in this invention;

[0022] Figure 3 This is an exploded view of the treatment head and groove in this invention;

[0023] Figure 4 This is an enlarged cross-sectional view of the treatment head in this invention;

[0024] Figure 5 This is an exploded view of the treatment head and the cap in this invention;

[0025] Figure 6 For the present invention Figure 3 Enlarged view of point A in the middle;

[0026] Figure 7 For the present invention Figure 4 Enlarged view of point B in the middle;

[0027] Figure 8 For the present invention Figure 5 Enlarged diagram of point C in the middle.

[0028] In the diagram: 1. Main unit; 2. Treatment head; 3. Cable; 4. Cavity; 5. End plate; 6. Carrier plate; 7. Microneedle; 8. Needle outlet; 9. Side groove; 10. Negative pressure groove; 11. Elastic sheet; 12. Electromagnet; 13. Connecting frame; 14. Magnet; 15. Channel; 16. Mounting port; 17. Miniature negative pressure pump; 18. Cover; 19. Inner tube; 20. Annular cavity; 21. Perforation; 22. Outer tube; 23. Thermoelectric cooling plate; 24. Guide plate; 25. Heat insulation cover; 26. Miniature motor; 27. Annular part; 28. Support; 29. ​​Groove; 30. Guide wheel. Detailed Implementation

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] A preferred embodiment of the microneedle treatment device for scar reduction provided by the present invention is as follows: Figures 1 to 8 As shown:

[0032] A microneedle treatment device for scar fading includes a main unit 1 and a treatment head 2. The treatment head 2 is electrically connected to the main unit 1 via a flexible cable 3. A cavity 4 is formed at the front end of the treatment head 2. An end plate 5 is fixedly installed at the end of the treatment head 2 to seal the cavity 4. A carrier plate 6 is slidably installed inside the cavity 4. Multiple elastic sheets 11 are fixedly connected to the carrier plate 6 and are fixedly connected to the treatment head 2. Multiple evenly distributed microneedles 7 are fixedly installed on the carrier plate 6. Multiple needle outlet holes 8 are formed on the carrier plate 6, and all needle outlet holes 8 penetrate the carrier plate 6. The ends of the microneedles 7 extend into the needle outlet holes 8. Multiple lateral grooves 9 are formed on the inner side of each needle outlet hole 8, and the lateral grooves 9 penetrate the carrier plate 6.

[0033] The cavity 4 is equipped with a drive mechanism, which is used to drive the microneedle 7 to reciprocate. The front end of the treatment head 2 has multiple negative pressure grooves 10 arranged in a circular array. The negative pressure grooves 10 are all distributed on the outside of the end plate 5. One end of the negative pressure groove 10 extends into the treatment head 2 and communicates with the cavity 4. The treatment head 2 is equipped with a negative pressure mechanism, which is used to draw air from the cavity 4 and generate negative pressure at the negative pressure grooves 10 and the side grooves 9.

[0034] The driving mechanism includes an electromagnet 12 fixedly installed inside the treatment head 2, a connecting frame 13 fixedly installed at the bottom of the carrier plate 6, and a magnet 14 fixedly installed at the lower end of the connecting frame 13. The magnet 14 is positioned facing the electromagnet 12, and the electromagnet 12 generates a repulsive force on the magnet 14 when energized.

[0035] The negative pressure mechanism includes a channel 15 formed inside the treatment head 2. An installation port 16 is provided on one side of the treatment head 2, and a miniature negative pressure pump 17 is fixedly installed on the treatment head 2 within the installation port 16. One end of the channel 15 communicates with the air inlet pipe of the miniature negative pressure pump 17, and the other end of the channel 15 communicates with the cavity 4. A cover 18 is provided at the installation port 16, which is installed on the treatment head 2 and used to seal the installation port 16. The exhaust pipe of the miniature negative pressure pump 17 passes through the cover 18 and communicates with the outside.

[0036] In this embodiment, the device consists of a main unit 1 and a treatment head 2, which are electrically connected via a flexible cable 3. The treatment head 2 has an internal cavity 4, the front end of which is sealed by an end plate 5. A slidable carrier plate 6 is installed inside the cavity 4, and multiple microneedles 7 are fixed on the carrier plate 6. The carrier plate 6 is connected to the treatment head 2 via an elastic sheet 11, giving it a repositioning capability. The device controls the reciprocating puncture motion of the microneedles 7 through a drive mechanism and creates a negative pressure environment on the skin through a negative pressure mechanism, assisting the microneedles 7 in precisely and efficiently acting on scar tissue.

[0037] The microneedle 7 operates as follows: When the main unit 1 powers the electromagnet 12, the electromagnet 12 generates a magnetic field, which exerts a repulsive force on the magnet 14, pushing the carrier plate 6 towards the front end of the treatment head 2 (i.e., towards the end plate 5). Since the microneedle 7 is fixed to the carrier plate 6, it moves forward with the carrier plate 6, extending out from the needle outlet 8 and piercing the skin. When the electromagnet 12 is de-energized, the repulsive force disappears, and under the elastic force of the elastic sheet 11, the carrier plate 6 is pulled back to its original position, and the microneedle 7 retracts into the cavity 4, completing one puncture cycle. The main unit 1 can control the on / off frequency of the electromagnet 12 to achieve high-frequency reciprocating puncture of the microneedle 7, thereby providing uniform and controllable minimally invasive stimulation to the scar area, promoting collagen remodeling and tissue repair.

[0038] When the miniature negative pressure pump 17 is started, it draws air from the cavity 4, causing the air pressure inside the cavity 4 to decrease.

[0039] The cavity 4 is connected to the skin surface through negative pressure grooves 10 (located outside the end plate 5 and arranged in a circular array); at the same time, the needle outlet 8 on the carrier plate 6 has a through lateral groove 9 on its inner side, which is also connected to the cavity 4. Negative pressure is generated at the negative pressure grooves 10, which locally attracts and tightens the skin in the treatment area, improving the verticality and consistency of the microneedle 7 puncture and reducing the risk of needle slippage or damage; the negative pressure at the lateral grooves 9 helps to form local tissue traction during microneedle 7 puncture, making it easier for the microneedle 7 to penetrate scar tissue and may promote the penetration of subsequent drugs or active ingredients; on the other hand, negative pressure can also help to remove trace amounts of tissue fluid or exudate generated during puncture, keeping the treatment area clean.

[0040] In a further preferred embodiment of the present invention:

[0041] The cavity 4 contains an inner tube 19 fixedly mounted on an end plate 5. The end plate 5 is a good heat conductor. Multiple coaxially arranged annular cavities 20 are opened in the end plate 5. Adjacent annular cavities 20 are connected by perforations 21. The perforations 21 are opened in the end plate 5. The innermost annular cavity 20 is connected to the inner tube 19. An outer tube 22 is fixedly mounted on the carrier plate 6. One end of the outer tube 22 is sleeved on the outside of the inner tube 19 and the two are slidably connected. The contact surface between the inner tube 19 and the outer tube 22 is sealed. The carrier plate 6 is an annular carrier plate. The inner cavity of the carrier plate 6, the outer tube 22, the inner tube 19, the multiple annular cavities 20 and the perforations 21 are in a connected state and are all filled with coolant. A thermoelectric cooling chip 23 is fixedly mounted on the carrier plate 6. The cold end of the thermoelectric cooling chip 23 faces the inner cavity of the carrier plate 6 and absorbs heat from the coolant.

[0042] The outer tube 22 is provided with a guide vane 24, which extends into the inner tube 19. One end of the guide vane 24 is rotatably mounted on the thermoelectric cooling chip 23 and passes through the thermoelectric cooling chip 23. The contact surface between the guide vane 24 and the thermoelectric cooling chip 23 is sealed. The hot end of the thermoelectric cooling chip 23 is fixedly mounted with a heat insulation cover 25. The heat insulation cover 25 is provided with a micro motor 26. The output shaft of the micro motor 26 is fixedly connected to the guide vane 24. The micro motor 26 is used to drive the guide vane 24 to rotate.

[0043] In this embodiment, an inner tube 19 is fixedly installed on an end plate 5 inside the cavity 4. The end plate 5 itself is a good thermal conductor and has multiple coaxial annular cavities 20 inside. Adjacent annular cavities 20 are connected by perforations 21, and the innermost annular cavity 20 is connected to the inner tube 19. Meanwhile, the carrier plate 6 has an annular structure, on which an outer tube 22 is fixed. The outer tube 22 is sleeved outside the inner tube 19 and is slidably sealed to the inner wall, forming a closed but relatively slidable double-layer tube structure.

[0044] The entire cooling channel consists of the following interconnected parts: the inner cavity of the carrier plate 6, the outer tube 22, the inner tube 19, the innermost annular cavity 20, the perforation 21, the outer annular cavity 20 (connected in sequence), and the return to the inner cavity of the carrier plate 6, forming a closed loop filled with coolant. Thermoelectric cooling element 23 directly absorbs heat and cools the coolant in contact with it, reducing the coolant temperature.

[0045] The micro motor 26 is installed inside the heat shield 25. The heat shield 25 is used to isolate the heat generated by the hot end of the thermoelectric cooling chip 23 to avoid interference with the motor. When the micro motor 26 is started, it drives the guide plate 24 to rotate, pushing the coolant to flow in a direction in the annular gap and inner cavity between the inner tube 19 and the outer tube 22, forming a forced convection circulation. The coolant flows from the inner cavity of the carrier plate 6 through the outer tube 22 into the inner tube 19; it enters the innermost annular cavity 20 of the end plate 5 through the inner tube 19, and then diffuses outward layer by layer to each annular cavity 20 through the perforation 21. Utilizing the good thermal conductivity of the end plate 5, the coolant in the annular cavity 20 can efficiently absorb the heat at the front end of the treatment head 2 (especially the working area of ​​the microneedle 7); the coolant after absorbing heat finally flows back to the inner cavity of the carrier plate 6 and is cooled again by the thermoelectric cooling chip 23 to complete the circulation.

[0046] By lowering the temperature of the treatment area, the patient's pain is reduced. On the other hand, the temperature of the microneedles and the treatment area is effectively controlled to avoid local overheating caused by high-frequency puncture and to protect the skin tissue.

[0047] In a further preferred embodiment of the present invention:

[0048] The treatment head 2 is fitted with and fixedly mounted with an annular portion 27. A support mechanism is mounted on the main unit 1 to support the treatment head 2 and the cable 3. The support mechanism includes a bracket 28 fixedly mounted on the main unit 1. A groove 29 is formed at the upper end of the bracket 28, in which the treatment head 2 is placed and the bracket 28 limits the position of the annular portion 27. A guide wheel 30 is fixedly mounted on the bracket 28, and the cable 3 is placed on the guide wheel 30.

[0049] The main unit 1 is equipped with casters at all four corners of its bottom, allowing the entire device to move, turn, and position flexibly within the treatment room. This facilitates rapid transfer between different beds or patients, making it particularly suitable for multi-workstation clinical or home care scenarios.

[0050] When the device is not in use, the treatment head 2 is placed in the groove 29, and the annular portion 27 is limited by the side wall of the groove 29, thereby preventing the treatment head 2 from rolling, slipping, or shaking in the non-operational state, ensuring its stability and safety during storage and standby. This structure allows the treatment head 2 to be easily removed when needed and conveniently returned after use, facilitating storage and rapid deployment, while avoiding contamination or damage to the microneedles 7 or negative pressure port due to careless placement. The flexible cable 3 is led out from the main unit 1 and rests on the guide wheel 30. The guide wheel 30 provides support and guidance for the cable 3.

[0051] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0052] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A microneedle treatment device for scar fading, comprising a main unit (1) and a treatment head (2), wherein the treatment head (2) is electrically connected to the main unit (1) via a flexible cable (3), characterized in that, The treatment head (2) has a cavity (4) at its front end and an end plate (5) fixedly installed at its end. The end plate (5) is used to seal the cavity (4). A carrier plate (6) is slidably installed inside the cavity (4). Multiple elastic sheets (11) are fixedly connected to the carrier plate (6). The elastic sheets (11) are fixedly connected to the treatment head (2). Multiple evenly distributed microneedles (7) are fixedly installed on the carrier plate (6). Multiple needle outlet holes (8) are opened on the carrier plate (6). The needle outlet holes (8) all penetrate the carrier plate (6). The ends of the microneedles (7) extend into the needle outlet holes (8). Multiple side grooves (9) are opened on the inner side of the needle outlet holes (8). The side grooves (9) penetrate the carrier plate (6). The cavity (4) is provided with a driving mechanism, which is used to drive the microneedle (7) to reciprocate. The front end of the treatment head (2) is provided with a plurality of negative pressure grooves (10) arranged in a circular array. The negative pressure grooves (10) are all distributed on the outside of the end plate (5). One end of the negative pressure groove (10) extends into the treatment head (2) and communicates with the cavity (4). The treatment head (2) is equipped with a negative pressure mechanism, which is used to draw air from the cavity (4) and generate negative pressure at the negative pressure grooves (10) and the side grooves (9).

2. The microneedle treatment device for scar reduction as described in claim 1, characterized in that, The driving mechanism includes an electromagnet (12) fixedly installed inside the treatment head (2), a connecting frame (13) fixedly installed at the bottom of the carrier plate (6), a magnet (14) fixedly installed at the lower end of the connecting frame (13), the magnet (14) is positioned facing the electromagnet (12), and the electromagnet (12) generates a repulsive force on the magnet (14) when energized.

3. The microneedle treatment device for scar reduction as described in claim 2, characterized in that, The negative pressure mechanism includes a channel (15) opened in the treatment head (2), and an installation port (16) is opened on one side of the treatment head (2). A miniature negative pressure pump (17) is fixedly installed in the installation port (16) on the treatment head (2). One end of the channel (15) is connected to the air inlet pipe of the miniature negative pressure pump (17), and the other end of the channel (15) is connected to the cavity (4).

4. The microneedle treatment device for scar reduction as described in claim 3, characterized in that, A cover (18) is provided at the installation port (16). The cover (18) is installed on the treatment head (2) and used to block the installation port (16). The exhaust pipe of the micro negative pressure pump (17) passes through the cover (18) and is connected to the outside.

5. The microneedle treatment device for scar reduction as described in claim 4, characterized in that, The cavity (4) is provided with an inner tube (19) fixedly installed on the end plate (5). The end plate (5) is a good heat conductor. Multiple coaxially arranged annular cavities (20) are opened in the end plate (5). Adjacent annular cavities (20) are connected by perforations (21). The perforations (21) are opened in the end plate (5). The innermost annular cavity (20) is connected to the inner tube (19). An outer tube (22) is fixedly installed on the carrier plate (6). One end of the outer tube (22) is sleeved with... Outside the inner tube (19), and the two are slidably connected. The contact surface of the inner tube (19) and the outer tube (22) is sealed. The carrier plate (6) is an annular carrier plate. The inner cavity of the carrier plate (6), the outer tube (22), the inner tube (19), multiple annular cavities (20) and the perforation (21) are in a connected state and are all filled with coolant. A thermoelectric cooling chip (23) is fixedly installed on the carrier plate (6). The cold end of the thermoelectric cooling chip (23) faces the inner cavity of the carrier plate (6) and absorbs heat from the coolant.

6. The microneedle treatment device for scar reduction as described in claim 5, characterized in that, The outer tube (22) is provided with a guide plate (24), which extends into the inner tube (19). One end of the guide plate (24) is rotatably mounted on the thermoelectric cooling plate (23) and passes through the thermoelectric cooling plate (23). The contact surface between the guide plate (24) and the thermoelectric cooling plate (23) is sealed. The hot end of the thermoelectric cooling plate (23) is fixedly mounted with a heat insulation cover (25). The heat insulation cover (25) is provided with a micro motor (26). The output shaft of the micro motor (26) is fixedly connected to the guide plate (24). The micro motor (26) is used to drive the guide plate (24) to rotate.

7. The microneedle treatment device for scar reduction as described in claim 1, characterized in that, The treatment head (2) is fitted with and fixedly mounted with an annular part (27), and the host (1) is equipped with a support mechanism for supporting the treatment head (2) and the cable (3).

8. The microneedle treatment device for scar reduction as described in claim 7, characterized in that, The support mechanism includes a bracket (28) fixedly installed on the host (1). The upper end of the bracket (28) has a groove (29). The treatment head (2) is placed in the groove (29) and the bracket (28) limits the annular part (27).

9. The microneedle treatment device for scar reduction as described in claim 8, characterized in that, A guide wheel (30) is fixedly installed on the bracket (28), and the cable (3) is placed on the guide wheel (30).

10. The microneedle treatment device for scar reduction as described in claim 1, characterized in that, The main unit (1) is equipped with casters at all four corners of its bottom.

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