Micro-needle device for treating skin sensitive injury through salmon hydro-optical needle injection

Abstract

The utility model relates to a microneedle device for treating skin sensitive injury through salmon hydro-optical needle injection. The microneedle device comprises a liquid storage device, a microneedle injection head, a pressure accumulator, a pressing rod and a guide sleeve, the micro-needle injection head comprises a micro-needle seat of which the front end is provided with a hollow micro-needle; the pressure accumulator is an elastic spherical body, is connected with the liquid accumulator through a first pipeline provided with a first one-way valve, and is connected with the microneedle injection head through a second pipeline provided with a second one-way valve; the second one-way valve is used for allowing the injection in the pressure accumulator to enter the micro-needle injection head through the second pipeline when the pressure accumulator is pressed to deform and the inlet pressure exceeds the set starting pressure; the microneedle injection head is fixed on the inner side of one port of the guide sleeve; the front end of the pressing rod extends into the guide sleeve; the pressure accumulator is arranged in the guide sleeve and located between the microneedle injection head and the pressing rod. The microneedle device is easy and convenient to use, quantitative injection can be achieved, the microneedle is prevented from stirring the skin, and microneedle blockage is effectively reduced or even avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical cosmetic appliances, and in particular to a microneedle device for salmon hydration injection to treat sensitive skin damage. Background Art

[0002] When skin is dehydrated, it can quickly become noticeably dry and tight, and various skin problems can gradually develop. The skin is composed of three layers: the epidermis, dermis, and subcutaneous tissue. The subcutaneous tissue primarily consists of the deep plexus of arteries and veins and subcutaneous fat. Therefore, the main factors contributing to dehydration lie in the epidermis and dermis. From the outside in, the epidermis can be subdivided into the stratum corneum, stratum granulosum, stratum spinosum, and stratum basale.

[0003] If dehydration affects the stratum spinosum, the epidermis is already severely damaged. This can cause the stratum spinosum to become loose, making the skin more susceptible to acne, rashes, or inflammation with a stinging sensation.

[0004] Salmon testis extract hydrating injections, also known as salmon hydrating injections, are primarily composed of small-molecule hyaluronic acid and polydeoxyribonudeotide (PDRN), extracted from salmon testes. PDRN has excellent anti-inflammatory, repair, and tissue regeneration properties. Small-molecule hyaluronic acid replenishes the skin with moisture, improving dryness and dehydration. It also enhances the skin's water retention capacity, leaving it more hydrated and plump. Therefore, salmon hydrating injections are effective in treating sensitive skin.

[0005] The injectable salmon hydrating needle mainly injects nutrient solution into the dermis of the skin through a needle to achieve the effects of removing wrinkles, brightening skin tone, and increasing skin elasticity.

[0006] For example, when using a microneedle roller for injection, the microneedles will slightly stimulate the skin during the microneedle roller process, which will increase the pain. Utility Model Content

[0007] In view of the above problems, the present invention is proposed to provide a microneedle device for salmon water light injection treatment of sensitive skin damage that overcomes the above problems or at least partially solves the above problems.

[0008] The microneedle device for salmon water light injection to treat sensitive skin damage includes:

[0009] a liquid reservoir, the liquid reservoir being used to contain an injection liquid;

[0010] A microneedle injection head, comprising a microneedle seat, the front end of which is provided with a plurality of microneedles arranged in an array, wherein the microneedles are hollow microneedles; the microneedle seat is formed with a liquid channel connected to the ends of each microneedle;

[0011] An accumulator, wherein the accumulator is an elastic spherical body, the internal space of which can be filled with injection liquid flowing from the liquid reservoir; the accumulator is formed with a liquid inlet and a liquid outlet, the liquid inlet of the accumulator is connected to the liquid outlet of the liquid reservoir via a first pipe, and the liquid outlet of the accumulator is connected to the liquid inlet of the liquid channel via a second pipe; the first pipe is provided with a first one-way valve, the first one-way valve is used to prevent the injection liquid in the accumulator from flowing back into the liquid reservoir; the second pipe is provided with a second one-way valve, the second one-way valve is used to allow the injection liquid in the accumulator to enter the liquid channel through the second pipe when the accumulator is deformed under pressure and the inlet pressure exceeds the set starting pressure, and to prevent the injection liquid in the liquid channel from being sucked into the accumulator;

[0012] a pressing rod, wherein the pressing rod is formed with an inner space for arranging the liquid reservoir;

[0013] The guide sleeve is a straight tube; the microneedle injection head is fixed on the inner side of one port of the guide sleeve, and the microneedle extends out of the guide sleeve; the front end of the pressing rod extends into the guide sleeve, and can approach and move away from the microneedle injection head under the action of external force; the pressure accumulator is arranged in the guide sleeve and is located between the microneedle injection head and the pressing rod, and the pressure accumulator can be compressed and deformed in the process of the front end of the pressing rod approaching the microneedle injection head; after the external force that forces the front end of the pressing rod to approach the microneedle injection head is removed, the pressure accumulator can gradually restore its spherical shape, and push the pressing rod to move away from the microneedle injection head, and cause the injection liquid in the reservoir to enter the pressure accumulator through the first pipe.

[0014] In one embodiment, the microneedle seat is further formed with a receiving chamber for receiving a second one-way valve.

[0015] In one embodiment, the microneedle injection head further includes a front baffle, which covers the opening of the accommodation chamber. When the front end of the pressing rod approaches the microneedle injection head, the front baffle and the front end of the pressing rod jointly squeeze the pressure accumulator.

[0016] In one embodiment, the front end of the pressing rod is provided with a rear baffle covering the opening of its internal space; the rear baffle is arranged parallel to the front baffle, and when the front end of the pressing rod approaches the microneedle injection head, the front baffle and the rear baffle jointly squeeze the accumulator.

[0017] In one embodiment, the first one-way valve is arranged in the inner space of the pressing rod.

[0018] In one embodiment, the liquid reservoir includes a liquid storage tube, and the openings at both ends of the liquid storage tube are respectively covered by two sealing plates, one of which forms the liquid discharge end, and the other sealing plate forms a vent; the liquid reservoir also includes a follower plug arranged in the liquid storage tube and cooperating with the inner wall of the liquid storage tube.

[0019] In one embodiment, the fluid reservoir comprises a soft infusion bag, and the soft infusion bag is formed with the discharge end.

[0020] In one embodiment, it further includes:

[0021] The protective sleeve is arranged on the front end of the guide sleeve, and includes a fixed portion, an elastic portion, and a protective portion distributed in sequence along the length direction of the guide sleeve; the fixed portion is fixedly connected to the outer wall surface of the guide sleeve, and the elastic portion is connected to the fixed portion and the protective portion at the same time; when the elastic portion is in a natural state, the protective portion is located away from the fixed portion and surrounds the microneedle; when the protective portion is acted upon by an external force and approaches the fixed portion, the elastic portion is deformed, and the microneedle gradually extends out of the protective portion.

[0022] In one embodiment, the cross-section of the guide sleeve is rectangular, and the elastic portion includes four sub-elastic portions surrounding the guide sleeve and corresponding to the outer wall surfaces of the guide sleeve, and the sub-elastic portions are separated from each other; the sub-elastic portion is generally in the shape of a long strip, and its length direction is perpendicular to the moving direction of the protective portion. When the sub-elastic portion is in a natural state, its cross-section is an arc-shaped protrusion away from the outer wall surface of the corresponding guide sleeve.

[0023] In one embodiment, the microneedles are arranged in a rectangular array.

[0024] This microneedle device for salmon hydration injection to treat sensitive skin damage is simple and convenient to use, capable of achieving quantitative injection. Furthermore, during the injection process, it can prevent the microneedles from irritating the skin and effectively reduce or even prevent microneedle clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0026] Figure 1 This is a cross-sectional view of an exemplary embodiment of a microneedle device for salmon hydration injection to treat sensitive skin lesions according to the present invention;

[0027] Figure 2 for Figure 1 Bottom view of the microneedle device shown;

[0028] Figure 3 for Figure 1 A cross-sectional view of the microneedle device in another state (where the protective portion is located close to the fixing portion);

[0029] Figure 4 for Figure 3 Bottom view of the microneedle device shown;

[0030] Figure 5 for Figure 1 A cross-sectional view of the microneedle device in yet another state (where the inlet pressure of the second one-way valve exceeds the set starting pressure);

[0031] Figure 6 for Figure 1 A cross-sectional view of the microneedle device in another state (the pressing rod is located close to the microneedle injection head).

[0032] Explanation of the accompanying drawings: 1. Liquid reservoir; 2. Microneedle injection head; 3. Accumulator; 4. Pressing rod; 5. Guide sleeve; 6. Liquid storage tube; 7. Sealing plate; 8. Vent; 9. Follow-up plug; 10. Microneedle seat; 11. Microneedle; 12. Liquid channel; 13. First pipe; 14. Second pipe; 15. First one-way valve; 16. Second one-way valve; 17. Receiving chamber; 18. Front baffle; 19. Rear baffle; 20. Protective sleeve; 21. Fixing part; 22. Elastic part; 23. Protective part; 24. Sub-elastic part. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but are not to be construed as limiting the present invention. Those skilled in the art may make various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.

[0034] The terms "center", "longitudinal", "lateral", "length", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like mentioned or may be mentioned in the description of the present invention indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Furthermore, the terms "include," "comprising," and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] The following describes a microneedle device for treating sensitive skin damage with salmon water light injection according to an embodiment of the present invention with reference to the accompanying drawings.

[0038] See also Figure 1 and Figure 2 According to an embodiment of the present invention, a microneedle device for salmon water light needle injection to treat sensitive skin damage includes a liquid reservoir 1, a microneedle injection head 2, an accumulator 3, a pressing rod 4, and a guide sleeve 5.

[0039] The reservoir 1 is used to hold the injection liquid and can be a soft infusion bag of suitable size. The volume of the soft infusion bag can be reduced as the amount of injection liquid therein decreases, and when the injection liquid is discharged, no resistance or minimal resistance is generated to the injection liquid. Of course, the soft infusion bag is formed with a discharge end. The soft infusion bag is made of medical-grade materials, such as PVC (polyvinyl chloride).

[0040] In this embodiment, the liquid reservoir 1 adopts a tubular structure. Specifically, the liquid reservoir 1 may include a liquid storage tube 6, the openings at both ends of the liquid storage tube 6 are respectively covered by two sealing plates 7, one of which is formed with a liquid discharge end, and the other is formed with a vent 8. The liquid reservoir 1 may also include a follower plug 9 disposed in the liquid storage tube 6 and cooperating with the inner wall of the liquid storage tube 6. Figure 1 From this perspective, as the reservoir 1 delivers the injection, the follower plug 9 moves downward synchronously with the drop in the injection level. The vent 8 formed in the upper sealing plate 7 prevents negative pressure from forming in the non-liquid storage space, i.e., the space above the follower plug 9, thereby reducing the resistance to the injection during the delivery of the injection from the reservoir 1.

[0041] The microneedle injection head 2 includes a microneedle holder 10, the front end of which is provided with a plurality of microneedles 11 arranged in an array. During the process of using the microneedle device to perform salmon water light injection to treat sensitive skin damage, the microneedles 11 can pierce the skin's outermost stratum corneum in a short period of time, stimulating the proliferation of skin collagen in a natural way without damaging the skin's epidermis. By stimulating the skin, the proliferation of collagen is promoted.

[0042] The microneedle 11 is a hollow microneedle, and the microneedle seat 10 is formed with a liquid channel 12 connected to the end of each microneedle 11. After the injection enters the liquid channel 12, it can be injected through the hollow microneedle 11. The main components of the injection can include small molecule hyaluronic acid and polydeoxyribonudeotide (PDRN) extracted from salmon testis. PDRN has good anti-inflammatory repair and tissue regeneration functions. Small molecule hyaluronic acid can replenish sufficient moisture for the skin, thereby improving problems such as dry skin and water shortage. At the same time, it can also enhance the water retention capacity of the skin, making the skin more hydrated and plump. Small molecule hyaluronic acid and PDRN can effectively treat skin sensitive damage.

[0043] The pressure accumulator 3 is an elastic sphere, for example, made of medical silicone. Applying an external force to the pressure accumulator 3 causes it to deform. Upon removal of the external force, the pressure accumulator 3 returns to its spherical shape. The pressure accumulator 3 is hollow and can be filled with the injection solution flowing from the reservoir 1.

[0044] The accumulator 3 is formed with a liquid inlet and a liquid outlet. The liquid inlet of the accumulator 3 is connected to the liquid outlet of the reservoir 1 through a first pipe 13, and the liquid outlet of the accumulator 3 is connected to the liquid inlet of the liquid channel 12 through a second pipe 14. Figure 1 From the perspective of perspective, in this embodiment, the liquid inlet of the accumulator 3 is located at the top of the accumulator 3, and the liquid discharge port of the accumulator 3 is located at the bottom of the accumulator 3. The liquid inlet of the accumulator 3 is connected to the discharge end of the liquid reservoir 1 located above through a first pipe 13, and the liquid discharge port of the accumulator 3 is connected to the liquid inlet end of the liquid channel 12 located below through a second pipe 14.

[0045] The first conduit 13 is provided with a first one-way valve 15, which is used to prevent the injection liquid in the accumulator 3 from flowing back into the reservoir 1. Specifically, after the accumulator 3 is deformed by pressure, the internal liquid pressure is greater than the liquid pressure in the reservoir 1. The first one-way valve 15 can effectively prevent the injection liquid in the accumulator 3 from flowing back into the reservoir 1. The single injection volume of the microneedle device can be the volume of the accumulator 3, or slightly less than the volume of the accumulator 3.

[0046] The second pipe 14 is provided with a second one-way valve 16, which is used to allow the injection liquid in the accumulator 3 to enter the liquid channel 12 through the second pipe 14 when the accumulator 3 is deformed under pressure and the inlet pressure exceeds the set starting pressure, and to prevent the injection liquid in the liquid channel 12 from being sucked into the accumulator 3.

[0047] Specifically, the first one-way valve 15 can be a one-way valve with a relatively low starting pressure to reduce the resistance of the accumulator 3 to the injection liquid drawn from the reservoir 1 during the process of the accumulator 3 returning to its spherical shape. The second one-way valve 16 can be a one-way valve with a relatively high starting pressure so that after the accumulator 3 is pressurized, the injection liquid inside it is hydraulically increased. When the pressure is increased to a level greater than or equal to the starting pressure of the second one-way valve 16, the second one-way valve 16 opens, and the injection liquid in the accumulator 3 can be injected into the skin in sequence through the second pipe 14, the liquid channel 12, and the microneedle 11. The changes in the accumulator 3 during the injection process can be seen in the following figure. Figure 3 、 Figure 5 、 Figure 6 The initial hydraulic pressure of a single injection is relatively large, which can effectively reduce or even avoid clogging of the microneedle 11.

[0048] The pressing rod 4 forms an inner space for arranging the liquid reservoir 1, and the liquid reservoir 1 moves along with the pressing rod 4. Figure 1 From the perspective, pressing the pressing rod 4 can act on the pressure accumulator 3 to deform the pressure accumulator 3. When the pressing rod 4 is released, the pressure accumulator 3 returns to the spherical shape, prompting the pressing rod 4 to move upward and reset.

[0049] The guide sleeve 5 is a straight tube that can guide the pressing rod 4 to approach the microneedle injection head 2 and reset it away from the microneedle injection head 2. Specifically, the microneedle injection head 2 is fixed to the inner side of one end of the guide sleeve 5, and the microneedle 11 extends out of the guide sleeve 5. Figure 1 From the perspective, the microneedle injection head 2 is fixed to the inner side of the lower end of the guide sleeve 5, and the microneedle 11 extends out of the lower end of the guide sleeve 5 to avoid the guide sleeve 5 hindering the microneedle 11 from acting on the skin. The front end of the pressing rod 4 extends into the guide sleeve 5, referring to Figure 1 The lower end of the pressing rod 4 extends into the guide sleeve 5. The pressing rod 4 can move closer to and away from the microneedle injection head 2 under the action of external force.

[0050] The pressure accumulator 3 is disposed within the guide cannula 5 and positioned between the microneedle injection head 2 and the pressing rod 4. As the front end of the pressing rod 4 approaches the microneedle injection head 2, the pressure accumulator 3 is compressed and deformed. When the external force forcing the front end of the pressing rod 4 toward the microneedle injection head 2 is removed, the pressure accumulator 3 gradually returns to its spherical shape, pushing the pressing rod 4 away from the microneedle injection head 2 and causing the injection liquid in the reservoir 1 to enter the pressure accumulator 3 through the first conduit 13.

[0051] To accelerate the movement of the pressing rod 4 away from the microneedle injection head 2, a spring can be added. This spring is arranged within the guide sleeve 5 and located between the microneedle injection head 2 and the pressing rod 4. When the pressure accumulator 3 is in a spherical shape, the spring is in a natural state, that is, neither compressed nor stretched. During the process of pressure accumulator 3 being compressed and deformed, the two ends of the spring respectively abut against the microneedle injection head 2 and the pressing rod 4, deforming synchronously with the pressure accumulator 3, that is, being compressed. As the pressure accumulator 3 gradually returns to its spherical shape, the spring also deforms synchronously, that is, stretching and recovering. Of course, the spring and the pressure accumulator 3 cannot interfere with each other.

[0052] In this embodiment, the microneedle holder 10 further defines a housing chamber 17 for accommodating the second one-way valve 16. The microneedle injection head 2 may further include a front baffle 18 that covers the opening of the housing chamber 17. When the front end of the pressing rod 4 approaches the microneedle injection head 2, the front baffle 18 and the front end of the pressing rod 4 jointly compress the pressure accumulator 3.

[0053] In this embodiment, the first one-way valve 15 can be arranged in the internal space of the pressing rod 4. The front end of the pressing rod 4 can be provided with a rear baffle 19 covering the opening of the internal space thereof. The rear baffle 19 is arranged parallel to the front baffle 18. When the front end of the pressing rod 4 approaches the microneedle injection head 2, the front baffle 18 and the rear baffle 19 jointly compress the pressure accumulator 3.

[0054] The microneedle device may further include a protective sleeve 20. The protective sleeve 20 is sleeved on the front end of the guide cannula 5 to prevent the microneedles 11 from accidentally causing harm to the human body during the injection process and to protect the microneedles 11 from accidental collisions that may cause breakage.

[0055] Specifically, the protective sleeve 20 may include a fixing portion 21, an elastic portion 22, and a protective portion 23 that are sequentially distributed along the length direction of the guide sleeve 5. Figure 1 From the perspective, the fixed part 21, the elastic part 22 and the protective part 23 are distributed in sequence from top to bottom. The fixed part 21 is fixedly connected to the outer wall of the guide sleeve 5, for example, it can be glued or laser welded. The elastic part 22 is connected to the fixed part 21 and the protective part 23 at the same time, and similarly, it can be glued or laser welded. When the elastic part 22 is in a natural state, the protective part 23 is at a position away from the fixed part 21 and surrounds the microneedle 11. In the process of the protective part 23 approaching the fixed part 21 under the action of external force, the elastic part 22 is deformed, and the microneedle 11 gradually extends out of the protective part 23. Figure 3 After the external force acting on the protective portion 23 is removed, the elastic portion 22 gradually returns to its original state, that is, gradually returns to its natural state, and the protective portion 23 moves forward to surround the microneedle 11.

[0056] Preferably, the guide cannula 5 has a rectangular cross-section, and the microneedles 11 are arranged in a corresponding rectangular array to facilitate the doctor's operation and avoid overlapping injections. Accordingly, the structures that cooperate with the guide cannula 5, such as the microneedle holder 10, the pressing rod 4, and the protective sleeve 20, are all shaped to cooperate with it.

[0057] When the cross section of the guide sleeve 5 is rectangular, the elastic portion 22 includes four sub-elastic portions 24 surrounding the guide sleeve 5 and corresponding to the outer wall surfaces of the guide sleeve 5. The sub-elastic portions 24 are separated from each other. The sub-elastic portions 24 are generally long strips, with their length direction perpendicular to the movement direction of the protective portion 23. When the sub-elastic portions 24 are in a natural state, their cross section is an arc-shaped protrusion away from the outer wall surface of the corresponding guide sleeve 5. Figure 1 From the perspective, when the protective portion 23 approaches the fixing portion 21 under the action of external force, the upper and lower edges of the sub-elastic portion 24 approach each other, and the middle portion extends outward to prevent the sub-elastic portion 24 from abutting against the outer wall of the guide sleeve 5.

[0058] The method for using the microneedle device for treating sensitive skin damage by salmon hydrating injection may include the following steps:

[0059] Press the pressing rod 4 to discharge the air in the pressure accumulator 3 and the liquid channel 12, so that the pressure accumulator 3 and the liquid channel 12 are filled with injection liquid (such as Figure 1 Then hold the guide cannula 5 so that the protective sleeve 20 contacts the target skin, and then push the guide cannula 5 downward so that the microneedle 11 protrudes from the protective sleeve 20 (as shown); Figure 3 As shown in the state), the micro needle 11 penetrates the skin, and then presses the pressing rod 4, the accumulator 3 deforms and accumulates pressure, and waits until the inlet pressure of the second one-way valve 16 exceeds the set starting pressure (as shown in the state). Figure 5 As shown in the state), the second one-way valve 16 is opened, and the pressing rod 4 is pressed continuously until the pressing rod 4 can no longer be pushed forward. At this time, the injection liquid in the accumulator 3 is almost completely discharged (as shown in the state). Figure 6 After the microneedle device is pulled out, the pressure accumulator 3 gradually returns to a spherical shape, absorbs the injection liquid from the reservoir 1, and pushes the pressing rod 4 to move backward and reset.

[0060] The microneedle device used in this embodiment for salmon hydration injection to treat sensitive skin lesions is simple and convenient to use, capable of achieving quantitative injection. Furthermore, during the injection process, it can prevent the microneedles from irritating the skin and effectively reduce or even prevent microneedle clogging.

Claims

1. A microneedle device for salmon water light injection to treat skin sensitive damage, characterized by: include: a liquid reservoir, the liquid reservoir being used to contain an injection liquid; A microneedle injection head, comprising a microneedle seat, the front end of which is provided with a plurality of microneedles arranged in an array, wherein the microneedles are hollow microneedles; the microneedle seat is formed with a liquid channel connected to the ends of each microneedle; An accumulator, wherein the accumulator is an elastic spherical body, the internal space of which can be filled with injection liquid flowing from the liquid reservoir; the accumulator is formed with a liquid inlet and a liquid outlet, the liquid inlet of the accumulator is connected to the liquid outlet of the liquid reservoir via a first pipe, and the liquid outlet of the accumulator is connected to the liquid inlet of the liquid channel via a second pipe; the first pipe is provided with a first one-way valve, the first one-way valve is used to prevent the injection liquid in the accumulator from flowing back into the liquid reservoir; the second pipe is provided with a second one-way valve, the second one-way valve is used to allow the injection liquid in the accumulator to enter the liquid channel through the second pipe when the accumulator is deformed under pressure and the inlet pressure exceeds the set starting pressure, and to prevent the injection liquid in the liquid channel from being sucked into the accumulator; a pressing rod, wherein the pressing rod is formed with an inner space for arranging the liquid reservoir; The guide cannula is a straight tube; the microneedle injection head is fixed to the inner side of one end of the guide cannula, and the microneedle extends out of the guide cannula; the front end of the pressing rod extends into the guide cannula and can move closer to and away from the microneedle injection head under the action of an external force; the pressure accumulator is arranged in the guide cannula and is located between the microneedle injection head and the pressing rod. When the front end of the pressing rod approaches the microneedle injection head, the pressure accumulator is compressed and deformed; after the external force forcing the front end of the pressing rod to approach the microneedle injection head is removed, the pressure accumulator can gradually return to a spherical shape, push the pressing rod to move away from the microneedle injection head, and cause the injection liquid in the reservoir to enter the pressure accumulator through the first pipe; The microneedle seat is further formed with a receiving chamber for receiving a second one-way valve; The microneedle injection head further includes a front baffle, which covers the opening of the accommodation chamber. When the front end of the pressing rod approaches the microneedle injection head, the front baffle and the front end of the pressing rod jointly squeeze the pressure accumulator; The front end of the pressing rod is provided with a rear baffle covering the opening of its internal space; the rear baffle is arranged parallel to the front baffle, and when the front end of the pressing rod approaches the microneedle injection head, the front baffle and the rear baffle jointly squeeze the accumulator.

2. The microneedle device for treating sensitive skin damage by salmon water light injection according to claim 1 is characterized by: The first one-way valve is arranged in the inner space of the pressing rod.

3. The microneedle device for treating sensitive skin damage by salmon water light injection according to claim 2 is characterized by: The liquid reservoir includes a liquid storage tube, and the openings at both ends of the liquid storage tube are respectively covered by two sealing plates, one of which forms the liquid discharge end, and the other sealing plate forms a vent; the liquid reservoir also includes a follower plug arranged in the liquid storage tube and cooperating with the inner wall of the liquid storage tube.

4. The microneedle device for treating sensitive skin damage by salmon water light injection according to claim 2, characterized in that: The liquid reservoir includes an infusion soft bag, and the infusion soft bag is formed with the discharge end.

5. The microneedle device for salmon water light injection treatment of skin sensitive damage according to claim 3 or 4, characterized in that: Also includes: The protective sleeve is arranged on the front end of the guide sleeve, and includes a fixed portion, an elastic portion, and a protective portion distributed in sequence along the length direction of the guide sleeve; the fixed portion is fixedly connected to the outer wall surface of the guide sleeve, and the elastic portion is connected to the fixed portion and the protective portion at the same time; when the elastic portion is in a natural state, the protective portion is located away from the fixed portion and surrounds the microneedle; when the protective portion is acted upon by an external force and approaches the fixed portion, the elastic portion is deformed, and the microneedle gradually extends out of the protective portion.

6. The microneedle device for treating sensitive skin damage by salmon water light injection according to claim 5 is characterized by: The cross-section of the guide sleeve is rectangular, and the elastic portion includes four sub-elastic portions surrounding the guide sleeve and corresponding to the outer wall surfaces of the guide sleeve, and the sub-elastic portions are separated from each other; the sub-elastic portion is generally long and strip-shaped, and its length direction is perpendicular to the moving direction of the protective portion. When the sub-elastic portion is in a natural state, its cross-section is an arc-shaped protrusion away from the outer wall surface of the corresponding guide sleeve.

7. The microneedle device for treating sensitive skin damage by salmon water light injection according to claim 6, characterized in that: The microneedles are arranged in a rectangular array.

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