Puncture liquid feeding device for skin superficial surface

Abstract

The invention provides a skin superficial puncture liquid feeding device which comprises a cylinder, a piston and a fixing hole plate are arranged in the cylinder, a liquid medicine cavity capable of being used for containing a liquid bag is defined by the front side face of the piston, the rear side face of the fixing hole plate and the inner wall of the cylinder, and a puncture structure capable of being used for puncturing the liquid bag is arranged in the liquid medicine cavity; a handle is arranged at the rear end of the piston and extends out of the rear end of the barrel; a microneedle array is arranged on the front side of the fixed pore plate and is positioned in the cylinder; and a protection structure is arranged at the front end of the barrel. By the adoption of the device, the liquid bag is squeezed to be punctured through the piston for liquid supply, and cleanliness of liquid medicine and dryness of the surface of the device are guaranteed; the negative pressure of the cylinder body is controlled by the amplitude of pulling out the handle, puncture is realized by utilizing the process that the skin is raised under the action of the negative pressure, the microneedle array can easily puncture and sink into the superficial surface of the skin, the deep skin is prevented from being injured, and the whole skin at the puncture part can uniformly absorb medicines.

Description

Technical Field

[0001] The invention relates to the technical field of skin medical instruments, and in particular to a puncture and liquid feeding device for superficial skin. Background Art

[0002] When treating skin diseases, it is necessary to administer drugs superficially to the skin. Applying and acupuncture are commonly used methods of administration. Currently, there are many products on the market with different application or acupuncture methods. For example:

[0003] Patent CN101011611A provides a suction cup needle-free syringe, which absorbs the skin bulge through the negative pressure of the suction cup body, and the skin bulge pushes the injection cartridge, so that the liquid medicine in the injection cartridge flows to the skin, and at the same time, the pores of the skin bulge are enlarged to achieve drug administration. The effective drug administration area of ​​the device depends on the flow path of the liquid medicine, and the skin bulge blocks the end of the injection cartridge, making it difficult for the liquid medicine to flow out, and it is impossible to achieve uniform puncture and drug administration on the entire bulge, so its treatment range is limited; in addition, the injection cartridge is inside the suction cup body, and it is difficult to ensure that it is aligned with the affected part of the skin during operation.

[0004] Patent CN209059289U provides a dermatological acne needle, which is aimed at the treatment position through a suction cup, and the treatment position is first punctured downward by the needle, and then the needle and the piston rise together to generate negative pressure in the suction cup to suck out the dirt in the skin. Since the needle will puncture the skin deeply when puncturing downward, this device cannot be used to treat some diseases that limit the depth of puncture; at the same time, its puncture process is separated from the negative pressure process, and it is not possible to combine with other negative pressure drug delivery devices. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to achieve superficial skin puncture and liquid delivery, avoid puncturing deep skin, and achieve uniform puncture and drug delivery of the entire affected area.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] The present invention provides a puncture and liquid delivery device for superficial skin, comprising a cylinder, wherein a piston and a fixed orifice plate are arranged in the cylinder, wherein the front side surface of the piston, the rear side surface of the fixed orifice plate and the inner wall of the cylinder form a liquid cavity for placing a liquid capsule, wherein a puncture structure for puncturing the liquid capsule is arranged in the liquid cavity; a handle is arranged at the rear end of the piston, and the handle extends out of the rear end of the cylinder; a microneedle array is arranged on the front side of the fixed orifice plate, and the microneedle array is located in the cylinder; and a protective structure is arranged at the front end of the cylinder.

[0008] The beneficial effects of the present invention are:

[0009] By adopting the present invention, the front end of the cylinder is an outward convex structure, which is easy to align with the puncture area; the liquid capsule is squeezed by the piston until it is punctured for liquid supply, and the drug solution is isolated from the outside world before use, thereby ensuring the cleanliness of the drug solution and the surface dryness of the device, and avoiding the growth of microorganisms; the negative pressure of the cylinder is controlled by the amplitude of pulling out the handle, and the puncture is achieved by utilizing the process of the skin bulging due to the negative pressure. During puncture, the superficial layer of the skin is in a relaxed state, the puncture resistance is small, and the microscopic thickness is increased, so that the microneedle array can easily puncture and sink into the superficial skin, avoiding damage to the deep skin, and achieving the goal that the entire skin at the puncture site can evenly absorb the drug.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the puncture structure is located on the rear side of the fixed orifice plate; and the liquid capsule is spherical, ellipsoidal or cylindrical.

[0012] The puncture position of the liquid capsule is located at the front end, and the liquid can directly infiltrate the microneedle array through the fixed hole plate, with a fast infiltration speed and high operating efficiency; at the same time, the liquid residue in the back half of the liquid cavity is reduced, the utilization rate of the liquid is high, and the cross contamination of the liquid is reduced when it is reused.

[0013] Furthermore, the puncture structure is a puncture needle, and the puncture needle is located at the edge of the fixed hole plate; the liquid capsule is spherical or ellipsoidal.

[0014] When not in use, the liquid capsule is not squeezed, and the edge of the liquid capsule does not touch the edge area of ​​the fixed hole plate, which effectively protects the liquid capsule from being punctured prematurely, avoids liquid medicine contamination, and keeps the fixed hole plate dry to prevent microbial growth.

[0015] Furthermore, a plurality of needles are distributed on the edge of the fixed orifice plate.

[0016] It is convenient to puncture multiple positions of the liquid capsule at the same time, so that the drug solution flows out evenly, and each part of the fixed hole plate and the microneedle array can be evenly infiltrated, the operation efficiency is high, and the waste of drug solution dripping due to a long infiltration process is avoided.

[0017] Furthermore, the fixed orifice plate is evenly and densely covered with through holes.

[0018] It is convenient to make the medicine liquid pass through the fixed orifice plate evenly; at the same time, when the piston is not pushed, the medicine liquid cannot pass through the through hole by itself under the action of surface tension, which is convenient to operate and avoids the waste of medicine liquid dripping out.

[0019] Furthermore, a retreat blocking plate is also provided in the cylinder, and the piston is located between the retreat blocking plate and the fixed orifice plate.

[0020] The retreat blocking plate can limit the maximum extent of the piston's retreat, thereby limiting the negative pressure in the cylinder, avoiding damage to the skin due to excessive negative pressure; at the same time, it limits the maximum extent of skin bulge, avoiding microneedles from piercing deep skin.

[0021] Furthermore, one end of the handle extending out of the cylinder is provided with a limit plate and a limit buckle, and the limit buckle is located at the front side of the limit plate and is sleeved on the handle.

[0022] Before use, the limit buckle is used to block the limit plate to prevent the handle from being pushed by external force and causing the liquid capsule to be punctured, which is safe.

[0023] Furthermore, the limiting buckle is an open ring and is elastic.

[0024] When in use, the limit buckle can be pulled from the opposite side of the opening to be removed; after production or use, the opening of the limit buckle can be opened and put on the handle. The installation is convenient and the limit buckle can be reused.

[0025] Furthermore, the opening of the limiting buckle is V-shaped and the large end of the opening is directly opposite to the center of the limiting buckle.

[0026] It is convenient to pull the limit buckle out from the handle, which reduces resistance and facilitates operation.

[0027] Furthermore, a replacement section is provided at the front end of the cylinder, the replacement section is connected to the cylinder through threads, and the fixed orifice plate is located in the replacement section.

[0028] After use, the device can be reused by replacing a new replacement segment and a new liquid capsule in the liquid cavity; the used liquid medicine and the contaminated skin tissue are removed together with the old replacement segment, avoiding cross infection caused by the microneedle array.

[0029] Furthermore, a water-absorbing material layer is provided at the front of the medicine liquid cavity, and the liquid capsule is arranged in the water-absorbing material layer.

[0030] When the sac is punctured, the medicine flows out to the medicine cavity and is absorbed by the water-absorbing material layer. The piston continues to be pushed, and the piston can squeeze out the medicine and pass through the fixed orifice plate, so as to facilitate the infiltration of the microneedle array and the affected skin area, and avoid the medicine passing through the fixed orifice plate in advance and causing dripping; when the handle is pulled out backward at a uniform speed, the water-absorbing material layer prevents the liquid from the fixed orifice plate from flowing to the rear end of the medicine cavity, thereby maintaining the cleanliness of the rear end of the medicine cavity and making it easier for the medicine to stay in the front part of the medicine cavity.

[0031] Furthermore, a closed structure is provided at the rear end of the cylinder, and the handle passes through the closed structure.

[0032] The closed structure can be a cover, a plate, an inner flange, etc., which is convenient for guiding the handle, avoiding the bending moment of the handle from being transmitted to the piston, and ensuring the sealing between the piston and the inner wall of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] Figure 2 It is a schematic diagram of the structure of the present invention with a replacement section.

[0035] Figure 3 It is a structural schematic diagram of the fixed orifice plate.

[0036] Figure 4 It is a schematic diagram of the structure of the limit buckle.

[0037] Figure 5 This is a schematic diagram before puncturing the sac during use.

[0038] Figure 6 Schematic diagram of liquid infiltrating the needle tip during use.

[0039] Figure 7 This is a schematic diagram of pushing the handle to the bottom when in use.

[0040] Figure 8 Schematic diagram of the negative pressure microneedle puncture process during use.

[0041] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0042] 1-cylinder; 2-piston; 3-handle; 4-fixed hole plate; 5-microneedle array; 6-liquid capsule; 7-puncture needle; 8-limiting disk; 9-limiting buckle; 10-retracting blocking plate; 11-protective cover; 12-replacement section; 13-water-absorbing material layer. DETAILED DESCRIPTION

[0043] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0044] The present invention refers to Figure 1-8 .

[0045] The present invention provides a puncture and liquid delivery device for superficial skin, comprising a barrel 1, wherein a piston 2 and a fixed orifice plate 4 are arranged inside the barrel 1, wherein the front side surface of the piston 2, the rear side surface of the fixed orifice plate 4 and the inner wall of the barrel 1 form a liquid cavity for placing a liquid capsule 6, wherein a puncture structure for puncturing the liquid capsule 6 is arranged inside the liquid cavity; a handle 3 is arranged at the rear end of the piston 2, and the handle 3 extends out of the rear end of the barrel 1; a microneedle array 5 is arranged at the front side of the fixed orifice plate 4, and the microneedle array 5 is located inside the barrel 1; and a protective structure is arranged at the front end of the barrel 1.

[0046] Note: The protective structure may be a protective cover 11, a plug, cotton, a sealing film, etc. During transportation and storage, the microneedle array 5 is placed in a closed environment to avoid contamination.

[0047] Usage steps: 1. Figure 5 As shown, remove the protective structure, push the handle 3 forward, and the piston 2 squeezes the liquid capsule 6 until it is deformed, until the liquid capsule 6 is punctured, and the liquid medicine in the liquid capsule 6 flows out into the liquid medicine cavity; 2. Figure 6 As shown, continue to slowly push the handle 3, and the liquid in the liquid cavity passes through the fixed orifice plate 4 under the push of the piston 2 until the needle tip of the microneedle array 5 is infiltrated by the liquid; 3. Figure 7 As shown, aim the front end of the barrel 1 at the affected part of the skin, and continue to push the handle 3 to the bottom, so that the space where the microneedle array 5 is located is filled with the liquid medicine, so that the liquid completely infiltrates the affected part of the skin; 4. Figure 8 As shown, the handle 3 is pulled out backward at a uniform speed, and negative pressure is generated at the front end of the barrel 1. The skin bulges toward the microneedle array 5 under the action of the negative pressure. The microneedle array 5 punctures the superficial surface of the skin, and the drug solution is fully absorbed by the skin from the uniform small holes punctured by the microneedles.

[0048] Since the magnitude of the negative pressure depends on the amplitude of pulling out the handle 3, and the amplitude of pulling out the handle 3 is controllable, the amplitude and pressure of the skin bulge caused by the negative pressure adsorption can be accurately controlled by controlling the amplitude of pulling out the handle 3, so that the microneedle only pierces the superficial skin without damaging the deep skin. At the same time, the puncture is achieved by utilizing the process of the skin bulging due to the negative pressure, the superficial layer of the skin is in a relaxed state, the puncture resistance is small, and the microscopic thickness is increased, which eliminates the possibility of the microneedle damaging the deep skin.

[0049] According to the specific use scenario, the present invention can be used as a disposable consumable, or it can be reused by replacing the liquid capsule 6 and the fixed orifice plate 4. It can be used to treat common skin diseases such as common warts, and can also be used for skin surface allergy detection.

[0050] In summary, according to the present invention, the front end of the cylinder 1 is an outward convex structure, which is easy to align with the puncture area; the liquid capsule 6 is squeezed by the piston 2 until it is punctured for liquid supply, and the drug solution is isolated from the outside world before use, thereby ensuring the cleanliness of the drug solution and the surface dryness of the device, and avoiding the growth of microorganisms; the negative pressure of the cylinder 1 is controlled by the amplitude of pulling out the handle 3, and the puncture is achieved by utilizing the process of the skin bulging due to the negative pressure. During puncture, the superficial layer of the skin is in a relaxed state, the puncture resistance is small, and the microscopic thickness is increased, so that the microneedle array 5 can easily puncture and sink into the superficial skin, avoiding damage to the deep skin, and achieving the goal that the entire skin at the puncture site can evenly absorb the drug.

[0051] Furthermore, the puncture structure is located on the rear side of the fixed orifice plate 4; the liquid capsule 6 is spherical, ellipsoidal or cylindrical.

[0052] The puncture position of the liquid capsule 6 is located at the front end, and the liquid can directly infiltrate the microneedle array 5 through the fixed hole plate 4, with a fast infiltration speed and high operating efficiency; at the same time, the liquid residue in the back half of the liquid cavity is reduced, the liquid utilization rate is high, and the cross contamination of the liquid is reduced when it is reused.

[0053] Furthermore, the puncture structure is a puncture needle 7, and the puncture needle 7 is located at the edge of the fixed hole plate 4; the liquid capsule 6 is spherical or ellipsoidal.

[0054] When not in use, the liquid capsule 6 is not squeezed, and the edge of the liquid capsule 6 does not contact the edge area of ​​the fixed hole plate 4, which effectively protects the liquid capsule 6 from being punctured prematurely, avoids liquid medicine contamination, and keeps the fixed hole plate 4 dry to avoid microbial growth.

[0055] Furthermore, a plurality of needles 7 are distributed on the edge of the fixed orifice plate 4 .

[0056] It is convenient to puncture multiple positions of the liquid capsule 6 at the same time, so that the liquid medicine flows out evenly, and each part of the fixed hole plate 4 and the microneedle array 5 can be evenly infiltrated, the operation efficiency is high, and the waste of liquid medicine dripping due to a long infiltration process is avoided.

[0057] Further, such as Figure 3 As shown: the fixed orifice plate 4 is evenly and densely covered with through holes.

[0058] Preferably, each microneedle on the microneedle array 5 is arranged corresponding to one through hole.

[0059] It is convenient to make the medicine liquid pass through the fixed orifice plate 4 evenly; at the same time, when the piston 2 is not pushed, the medicine liquid cannot pass through the through hole by itself under the action of surface tension, which is convenient to operate and avoids the waste of medicine liquid dripping out.

[0060] Furthermore, a retreat blocking plate 10 is also provided in the cylinder 1 , and the piston 2 is located between the retreat blocking plate 10 and the fixed orifice plate 4 .

[0061] The retreat blocking plate 10 can limit the maximum extent of the retreat of the piston 2, thereby limiting the negative pressure in the cylinder 1, avoiding damage to the skin due to excessive negative pressure; at the same time, it limits the maximum extent of skin bulge, avoiding microneedles from piercing deep skin.

[0062] Further, such as Figure 1 , 2 As shown in FIG. 4 , the end of the handle 3 extending from the cylinder body 1 is provided with a limit plate 8 and a limit buckle 9 . The limit buckle 9 is located at the front side of the limit plate 8 and is sleeved on the handle 3 .

[0063] Before use, the limiting buckle 9 blocks the limiting plate 8 to prevent the handle 3 from being pushed by external force and causing the liquid capsule 6 to be punctured, which has good safety.

[0064] Further, such as Figure 4 As shown: the limit buckle 9 is an open ring and is elastic.

[0065] When in use, the limit buckle 9 can be pulled out from the opposite side of the opening; after production or use, the opening of the limit buckle 9 can be opened and it can be put on the handle 3, which is easy to install and the limit buckle 9 can be reused.

[0066] Furthermore, the opening of the limiting buckle 9 is V-shaped and the large end of the opening is directly opposite to the center of the limiting buckle 9 .

[0067] It is convenient to pull the limit buckle 9 out from the handle 3, which reduces the resistance and facilitates the operation.

[0068] Further, such as Figure 2 As shown: a replacement section 12 is provided at the front end of the cylinder 1 , the replacement section 12 is connected to the cylinder 1 by threads, and the fixed orifice plate 4 is located in the replacement section 12 .

[0069] After use, the device can be reused by replacing a new replacement segment 12 and a new liquid capsule 6 in the liquid medicine cavity; the used liquid medicine and the contaminated skin tissue are removed together with the old replacement segment 12, thus avoiding cross infection caused by the microneedle array 5.

[0070] Furthermore, a water-absorbing material layer 13 is provided at the front of the medicine liquid cavity, and the liquid capsule 6 is arranged in the water-absorbing material layer 13 .

[0071] When the liquid capsule 6 is punctured, the medicine flows out to the medicine cavity and is absorbed by the water-absorbing material layer 13, and the piston 2 continues to be pushed. The piston 2 can squeeze out the medicine and pass through the fixed hole plate 4, which is convenient for infiltrating the microneedle array 5 and the affected part of the skin, and avoids the medicine passing through the fixed hole plate 4 in advance to cause dripping; when the handle 3 is pulled out backward at a uniform speed, the water-absorbing material layer 13 prevents the liquid from the fixed hole plate 4 from flowing to the rear end of the medicine cavity, maintains the cleanliness of the rear end of the medicine cavity, and makes it easy for the medicine to stay in the front part of the medicine cavity.

[0072] Furthermore, a closed structure is provided at the rear end of the cylinder body 1, and the handle 3 passes through the closed structure.

[0073] The closed structure can be a cover, a plate, an inner flange, etc., which is convenient for guiding the handle 3 to prevent the bending moment of the handle 3 from being transmitted to the piston 2, thereby ensuring the sealing between the piston 2 and the inner wall of the cylinder 1.

[0074] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0075] In addition, if there are order description terms, such as "first", "second", etc., their purpose in this specification is to facilitate understanding or simplify description. For example, in order to distinguish multiple technical features of the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, if the terms describing the relative functional relationship of structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be a fixed connection, a detachable connection, or an integrated one; can be a mechanical connection or an electrical connection; can be a direct connection or an indirect connection through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements; "fix" can be an integrated fixation or a detachable fixation through fasteners; can be a direct fixation or a fixation through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0077] In the present invention, if there are descriptive terms with subsidiary or connecting meanings, for example, a first feature is "on" or "below" a second feature, unless otherwise clearly specified and limited, it should not be interpreted in a restrictive manner. For example, "on" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0078] Furthermore, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of the different embodiments and examples described in this specification without contradiction, and these combinations or combinations shall all fall within the scope summarized by the present invention.

[0080] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by a person skilled in the art within the scope of information available from public channels and in combination with the technical inspiration provided by the present application documents are still within the scope of protection of the present application.

Claims

1. A puncture and liquid delivery device for superficial skin, characterized in that: The invention comprises a cylinder (1), wherein a piston (2) and a fixed orifice plate (4) are arranged inside the cylinder (1), wherein the front side of the piston (2), the rear side of the fixed orifice plate (4) and the inner wall of the cylinder (1) form a liquid medicine cavity for placing a liquid capsule (6), wherein a puncturing structure for puncturing the liquid capsule (6) is arranged inside the liquid medicine cavity; a handle (3) is arranged at the rear end of the piston (2), and the handle (3) extends out of the rear end of the cylinder (1); a microneedle array (5) is arranged at the front side of the fixed orifice plate (4), and the microneedle array (5) is located inside the cylinder (1); and a protective structure is arranged at the front end of the cylinder (1).

2. The puncture and liquid feeding device for superficial skin according to claim 1, characterized in that: The puncture structure is located on the rear side of the fixed orifice plate (4); the liquid capsule (6) is spherical, ellipsoidal or cylindrical.

3. The puncture and liquid feeding device for superficial skin according to claim 2, characterized in that: The puncturing structure is a puncture needle (7), and the puncture needle (7) is located at the edge of the fixed hole plate (4); the liquid capsule (6) is spherical or ellipsoidal.

4. The superficial puncture and liquid feeding device according to claim 3, characterized in that: A plurality of needles (7) are distributed on the edge of the fixed orifice plate (4); and through holes are evenly and densely distributed on the fixed orifice plate (4).

5. The puncture and liquid feeding device for superficial skin according to claim 1, characterized in that: A retreat blocking plate (10) is also provided in the cylinder (1), and the piston (2) is located between the retreat blocking plate (10) and the fixed orifice plate (4).

6. The superficial puncture and liquid feeding device according to claim 1, characterized in that: One end of the handle (3) extending from the cylinder (1) is provided with a limiting plate (8) and a limiting buckle (9); the limiting buckle (9) is located on the front side of the limiting plate (8) and is sleeved on the handle (3).

7. The superficial puncture and liquid feeding device according to claim 6, characterized in that: The limiting buckle (9) is in the shape of an open ring and is elastic.

8. The puncture and liquid feeding device for superficial skin according to claim 7, characterized in that: The opening of the limiting buckle (9) is V-shaped, and the large end of the opening is directly opposite to the center of the limiting buckle (9).

9. The superficial puncture and liquid feeding device according to claim 1, characterized in that: A replacement section (12) is provided at the front end of the cylinder (1), the replacement section (12) is connected to the cylinder (1) via threads, and the fixed orifice plate (4) is located inside the replacement section (12).

10. The superficial puncture and liquid feeding device according to claim 1, characterized in that: The rear end of the barrel (1) is provided with a closed structure, and the handle (3) passes through the closed structure; the front part of the liquid medicine cavity is also provided with a water-absorbing material layer (13), and the liquid capsule (6) is arranged in the water-absorbing material layer (13).

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