Skin care chip and skin care instrument

Abstract

The invention relates to a skin care product in the technical field of transdermal drug delivery, in particular to a skin care chip and a skin care instrument. The skin care chip comprises a substrate, miniature protrusions are formed on the front face of the substrate, one or more limiting parts are further formed on the front face of the substrate, each limiting part is provided with a top face capable of making contact with the skin, each limiting part is further provided with one or more side faces, and the side faces are formed between the top faces and the front face of the substrate; the micro protrusions are distributed close to at least one side face of the limiting part, and a preset distance is formed between the micro protrusions and the side faces. When the skin care chip acts on the skin, the top face presses the skin to enable the skin around the limiting part to be continuously sunken, and the micro protrusions which are close to the limiting part and have the preset distance can penetrate into the skin by the preset depth. According to the technical scheme, the transdermal puncture depth can be regulated and controlled, non-uniformity of the puncture depth caused by skin depression is avoided, the situation that the puncture depth of the micro protrusions is too deep, and consequently design expectation is exceeded is prevented, and the use precision is further reliably improved.

Description

Technical Field

[0001] This invention relates to a skin care product in the field of transdermal drug delivery technology, and more particularly, to a skin care chip and a skin care device. Background Technology

[0002] The stratum corneum of human skin acts as a physiological barrier, effectively preventing the invasion of external bacteria and microorganisms. However, it also hinders the transdermal absorption of active ingredients. In the field of transdermal drug delivery and skin care technology, existing technologies mainly rely on chemical penetration enhancers (such as traditional plasters) or physical penetration enhancers to improve transdermal efficiency. However, chemical penetration enhancers are prone to causing allergic reactions such as skin redness, swelling, and itching. The mainstream physical transdermal technology—microneedle transdermal drug delivery—offers advantages such as being non-invasive and safe.

[0003] In the field of microneedle transdermal drug delivery technology, different microneedle puncture depths are required to address various skin problems or care needs. The mainstream technology in this area is to produce microneedles of different heights to meet diverse needs. While this approach can satisfy various care requirements, it also results in a wide variety of microneedle product sizes and complex production lines. Furthermore, microneedle transdermal drug delivery technology still has many areas for improvement in terms of puncture depth control, operational safety, and drug delivery stability.

[0004] The main structure of microneedle products includes a substrate and needles formed on the substrate, with the needles arranged in an array on the substrate (CN100402107C, CN100355470C, etc.). Existing microneedle products are classified into several types according to the needle type, including solid microneedles, hollow microneedles, and soluble microneedles. The aspect ratio (the ratio of microneedle height to microneedle base width) of microneedles is generally 5:1, 10:1, or higher. While this ratio is beneficial for penetrating the stratum corneum, the actual puncture depth fluctuates significantly due to uneven force applied by the user or differences in skin elasticity. These factors result in low transdermal drug delivery efficiency when the microneedles penetrate superficially, and a high risk of damaging nerve endings in the dermis when penetrating deeply, inducing bleeding, pain, or inflammation. Especially in medical care scenarios, medical-grade high-needle products require a long recovery period after surgery, making them unsuitable for high-frequency daily care. Furthermore, high-needle microneedles with a high aspect ratio pose a risk of needle breakage and residue, further limiting their application in people with sensitive skin.

[0005] In addition to the aforementioned general drawbacks, hollow microneedles are expensive due to the difficulty in processing their nanoscale hollow structure; soluble microneedle materials (such as hyaluronic acid complexes) have insufficient mechanical strength, resulting in ineffective puncture and needle breakage, and have the drawback of low utilization of active ingredients. Furthermore, soluble microneedles need to be applied piece by piece during use, which takes a long time for each treatment, is cumbersome, and can easily cause repeated local irritation.

[0006] In addition to the structural defects of the products themselves, microneedling products rely on a reciprocating lifting technique (CN103079634B) during operation. Ordinary users find it difficult to accurately control the puncture frequency and pressure threshold. Excessive force or prolonged pressing can cause local epidermal stress reactions, which further increases the rate of skin allergies.

[0007] On the other hand, the mechanical properties of skin tissue are close to those of a viscoelastic solid. When its vibration frequency exceeds 200 Hz, the skin exhibits significant solid characteristics due to high-frequency stress. In the field of microneedle transdermal drug delivery technology, the mainstream approach is to utilize the solid characteristics of the skin under this high-frequency vibration, and to select a nursing instrument with a vibration frequency much higher than 200 Hz to perform puncture care on the skin, thereby reducing the error fluctuation of the puncture depth.

[0008] In summary, existing microneedle transdermal technologies suffer from uncontrollable puncture depth, insufficient structural strength, and inadequate operability, leading to unstable transdermal drug delivery efficiency, increased sensitization rates, and limited user experience. Therefore, there is an urgent need for a microneedle transdermal technology solution that can precisely control puncture depth, reduce mechanical damage, and is compatible with non-professional operations. This would meet the diverse needs of medical and daily care scenarios and effectively suppress allergic reactions caused by uneven transdermal penetration. Summary of the Invention

[0009] To address the technical problems of existing microneedle products, such as uncontrollable puncture depth, high sensitization rate, high operation difficulty, and unstable transdermal delivery efficiency, this invention innovates on the structure itself to provide a unique skin care chip and skin care device.

[0010] The skin care chip includes a substrate, on the front side of which micro-protrusions are formed. One or more limiting portions are also formed on the front side. The limiting part has a top surface that can contact the skin. The limiting portion also has one or more side surfaces, which are formed between the top surface and the front surface of the substrate; The micro protrusions are distributed near at least one side of the limiting portion, and there is a preset distance between the micro protrusions and the side. When the skin care chip is applied to the skin, the top surface presses against the skin, causing the skin around the limiting portion to continuously indent. The micro protrusions near the limiting portion with the preset spacing can penetrate the skin to a preset depth.

[0011] The technical solution is further explained below.

[0012] The front side of the substrate: The substrate can be processed into a flat, thin plate shape, and this structure has opposing front and back sides. For ease of description and understanding, the side of the substrate facing the skin and where the micro-protrusions are distributed is defined as the front side of the substrate. The substrate in this technical solution can be made of at least one material selected from monocrystalline silicon, metal, polymer materials, and ceramics. It is easy to understand that the substrate is a flat plate, and its front side is also a plane, excluding arched or bent surfaces.

[0013] Micro-bumps: In this technical solution, micro-bumps refer to microstructures that arch or protrude from the front of the substrate, such as microneedles, microknives, or clusters of microneedles. The height of the micro-bumps ranges from 1 to 1000 micrometers, and the bottom width ranges from 1 to 1000 micrometers. Micro-bumps and limiting portions can be formed by etching the substrate material using 3D etching processes, or by removing excess parts of the substrate using chemical processes such as wet etching.

[0014] Limiting portion: In this technical solution, the cross-section of the limiting portion can be rectangular, trapezoidal, or other suitable shapes. The surface of the limiting portion facing the skin and capable of contacting the skin is the top surface of the limiting portion, and the outer surface connecting this top surface to the front surface of the substrate is defined as the side surface. The limiting portions can be distributed in various shapes on the substrate.

[0015] Continuous depression: Because the skin is continuous, when the skin is pressed and depressed, the depression deformation is also continuous.

[0016] Preset Spacing: In this technical solution, the micro-protrusions are positioned within a specific distance range near the side of the limiting part. This preset spacing is the shortest distance between the end of the micro-protrusion and the side of the limiting part. When the limiting part presses against the skin and forms a small indentation, with the limiting part as the center, the closer the micro-protrusion is to the limiting part, the shallower its penetration depth into the skin; while the micro-protrusion farther away from the limiting part can penetrate the skin to a deeper depth. That is, in this technical solution, the preset spacing between the micro-protrusion and the side of the limiting part is positively correlated with the preset depth of penetration of the micro-protrusion into the skin. It should be noted that the "distribution of micro-protrusions near the side of the limiting part" in this technical solution includes the following situations: both the case where the micro-protrusion is directly opposite the side of the limiting part and the case where the micro-protrusion is not directly opposite the side of the limiting part. For example, when the limiting part is prismatic, the micro protrusions can be positioned directly opposite the centerline of one side of the limiting part; they can also be distributed near the connecting edge of two adjacent sides, i.e., at one edge of the limiting part; or they can be evenly distributed around the prismatic limiting part. As another example, when the limiting part is cylindrical, the micro protrusions can be distributed around the cylinder.

[0017] One of the original design features of this technical solution lies in the introduction and design of the limiting part. This limiting part utilizes the viscoelastic properties of skin. When the skin care chip acts on the skin at a frequency below 200Hz, the top surface of the limiting part presses against the skin, causing it to indent and resulting in continuous indentation deformation of the skin around the limiting part. Thus, the depth of penetration of the micro-protrusions distributed within a specific distance range of the limiting part into the skin can be controlled, preventing the micro-protrusions from penetrating too deeply. Compared to existing technologies that meet various care needs by producing microneedles of different specifications, this technical solution adjusts the depth of penetration of the micro-protrusions into the skin by changing the preset distance between the micro-protrusions and adjacent limiting parts, thereby meeting various care needs for different puncture depths.

[0018] The advantage of this technical solution lies in providing a uniquely structured skin care chip and proposing a novel technical solution for regulating puncture depth.

[0019] More importantly, this technical solution improves the user experience: when using this skin care chip, users no longer need to worry about excessive force, as the limiting structure automatically controls the puncture depth, ensuring it remains within a suitable range. When the puncture depth is controllable, the stability of transdermal drug delivery is also enhanced. In summary, the skin care chip in this technical solution features a unique structural design and offers technological advancements such as ease of operation, automatic controllable puncture depth, low sensitization rate, and stable transdermal drug delivery efficiency.

[0020] In a preferred embodiment, the preset spacing is not less than 30 micrometers and not more than 2000 micrometers.

[0021] It is readily understood that the front surface of the substrate is not limited in shape and can be a regular polygon, an irregular polygon, a circle, or other curved shapes (such as an ellipse). In a preferred embodiment, the front surface of the substrate is rectangular. Further, this rectangle can be a long strip with a longer length (long side) and a narrower width (short side). This structural design effectively reduces the overall area of ​​the skin care chip while maintaining a large treatment length. When using this skin care chip for skin care, the chip moves along the short side of the substrate, and the long side slides to care for the skin, maintaining a large treatment area and high efficiency.

[0022] In a preferred embodiment, the limiting portion, the micro-protrusion, and the substrate are integrated into a single structure. Optional processing techniques include 3D laser etching, wet etching, etc.

[0023] In a preferred embodiment, the material used to manufacture the micro-protrusions is at least one of the following: metallic materials, polymeric materials, inorganic crystal materials (such as high-purity single-crystal silicon or ceramics), inorganic amorphous materials (such as glass), and modified materials (such as glass-ceramic materials).

[0024] In a preferred embodiment, the top ends of the micro protrusions are on the same plane, and the top surface of the limiting portion is parallel to the plane.

[0025] In a further preferred embodiment, the microprotrusion is cone-shaped, and the ratio of the height of the microprotrusion to the width of its base is its aspect ratio. At least two types of microprotrusions with different aspect ratios are present on the front side of the substrate. In this preferred embodiment, microprotrusions with different aspect ratios have different puncture forces. This application adjusts the aspect ratio of the microprotrusions to control the depth of penetration into the skin by microprotrusions at different locations, thereby achieving multiple transdermal drug delivery depths in a single skin care procedure.

[0026] In a further preferred embodiment, the height of the limiting portion is greater than or equal to the height of the micro-protrusion. In this preferred embodiment, the height of the micro-protrusion in the skin care chip does not exceed the limiting portion, thus the puncture end of the micro-protrusion is less susceptible to wear and external impact during packaging, resulting in better protection. Furthermore, because the height of the micro-protrusion does not exceed the limiting portion, during skin care, the micro-protrusion only punctures the superficial layer of the skin, effectively preventing excessive puncture depth. This preferred embodiment is more suitable for superficial skin care, is simpler and more convenient to operate, and is safer to use.

[0027] In a further preferred embodiment, the height of the limiting portion is less than the height of the micro protrusion.

[0028] In a preferred embodiment, the limiting portion is formed on the edge of the front side of the substrate. The limiting portion can be formed on one side edge of the front side of the substrate; it can also be formed on two opposite edges of the front side of the substrate; or it can be formed around the perimeter of the front side of the substrate, forming a closed limiting ring. It is readily apparent that the limiting portions can be arranged in different ways depending on the shape of the substrate.

[0029] In a preferred embodiment, the limiting portion is formed at the center of the front side of the substrate.

[0030] In a preferred embodiment, the limiting portions are arranged in an array on the front side of the substrate. The limiting portions may be arranged in a discrete array on the front side of the substrate.

[0031] In a preferred embodiment, the limiting portion forms a grid structure and divides the front side of the substrate into one or more blocks, with the micro protrusions distributed in each of the blocks.

[0032] In a further preferred embodiment, a shallow groove is formed on the top surface of the limiting portion. Depending on the shape or arrangement of the limiting portions, the limiting grooves on different limiting portions can communicate with each other. In this embodiment, the design of the shallow groove promotes the rapid diffusion of active ingredients and serums on the skin surface, acting as a guide and channel. Simultaneously, when the skin care chip slides on the skin surface, the edge of the shallow groove can scrape the skin surface, providing a massage function and further accelerating the dispersion and absorption of active ingredients such as serums on the skin surface.

[0033] In a preferred embodiment, a through hole is also formed on the substrate, with one end of the through hole formed on the back side of the substrate and the other end of the through hole formed on the limiting portion.

[0034] The skin care chip in this application can be used as a consumable in an instrument. Therefore, this invention also provides a skin care device, comprising a body, a skin care end, a drive module, and any of the aforementioned skin care chips; the skin care chip is detachably mounted on the skin care end, and the drive module can drive the skin care chip to reciprocate repeatedly to contact, separate from, and care for the skin. In a preferred embodiment, the frequency at which the drive module drives the skin care chip to reciprocate is no greater than 200 Hz. The skin care chip in this technical solution has a unique structure, wherein the limiting part utilizes the viscoelastic properties of the skin, forming continuous indentations when the skin surface is pressed. Correspondingly, the vibration frequency of this skin care device is preferably no greater than 200 Hz. This technical solution allows the skin care chip to stably and controllably penetrate the skin to a suitable depth during skin care, thereby providing stable and safe transdermal drug delivery efficiency. This technical direction contradicts the mainstream direction of existing technologies, opening up a completely new technical direction and possessing unique technological advancements. Attached Figure Description

[0035] Figure 1 This is a cross-sectional structural schematic diagram of a skin care chip according to an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of the front side of the substrate in one embodiment of a skin care chip of the present invention.

[0037] Figure 3 This is a schematic diagram of the structure of a skin care chip according to an embodiment of the present invention assembled on a skin care device.

[0038] Figure 4 This is a cross-sectional structural schematic diagram of a second embodiment of a skin care chip according to the present invention.

[0039] Figure 5 This is a schematic diagram of the front side of the substrate in Embodiment 2 of the skin care chip of the present invention.

[0040] Figure 6 This is a cross-sectional structural diagram of a third embodiment of the skin care chip of the present invention.

[0041] Figure 7 This is a schematic diagram of the front side of the substrate in Embodiment 3 of the skin care chip of the present invention.

[0042] Figure 8 This is a schematic diagram of the front side of the substrate in Embodiment 4 of the skin care chip of the present invention.

[0043] Figure 9 This is a schematic diagram of the front side of the substrate in Embodiment 5 of the skin care chip of the present invention.

[0044] Figure 10 This is a cross-sectional structural schematic diagram of a sixth embodiment of the skin care chip of the present invention.

[0045] Figure 11 This is a cross-sectional structural diagram of a skin care chip according to a seventh embodiment of the present invention.

[0046] Figure 12 This is a cross-sectional structural schematic diagram of an eighth embodiment of a skin care chip according to the present invention.

[0047] Figure 13 This is a schematic diagram of the front side of the substrate in Embodiment 9 of the skin care chip of the present invention.

[0048] Figure 14 This is a schematic diagram of the front side of the substrate in Embodiment 10 of the skin care chip of the present invention.

[0049] Figure 15 This is a schematic diagram of the front side of the substrate in Embodiment Eleven of the present invention, which is a skin care chip.

[0050] Figure 16 This is a schematic diagram of the front side of the substrate in Embodiment Twelve of the present invention, which is a skin care chip.

[0051] List of reference numerals in the attached diagram: A. Skin care chip; B. Skin care device, skin care end B1; 1. Substrate, 11. Front side of substrate, 110. Edge of front side of substrate, 12. Back side of substrate; 2. Micro protrusion, 21. Top of micro protrusion; 3. Limiting part, 31. Top surface of limiting part, 32. Side surface of limiting part; 301. Center of limiting part, 302. Extension of limiting part; 4. Shallow groove; 5. Through hole. Detailed Implementation

[0052] To address the technical deficiency of uncontrollable puncture depth in existing microneedle products, this invention provides a skin care chip. The skin care chip A includes a substrate 1. Micro-protrusions 2 are formed on the front surface 11 of the substrate 1. One or more limiting portions 3 are also formed on the front surface 11. Each limiting portion 3 has a top surface 31 capable of contacting the skin and one or more side surfaces 32 formed between the top surface 31 and the front surface 11 of the substrate 1. The micro-protrusions 2 are distributed near at least one side surface 32 of the limiting portion 3, with a predetermined distance between the micro-protrusions 2 and the side surface 32. When the skin care chip A is applied to the skin, the top surface 31 presses against the skin, causing continuous indentation of the skin around the limiting portion 3. The micro-protrusions 2 with the predetermined distance near the limiting portion 3 can penetrate the skin to a predetermined depth. In this technical solution, the substrate 1 of the skin care chip A can be formed from at least one material selected from monocrystalline silicon, metal, polymer materials, and ceramics. The surface of the substrate 1 is processed using a 3D etching process or a wet etching process. By removing excess material, micro-bumps 2 and limiting portions 3 can be formed on the substrate 1. At this time, the limiting portions 3 and the micro-bumps 2 are integrally formed with the substrate 1. The materials of the micro-bumps 2 and the limiting portions 3 are the same as those of the substrate 1, namely at least one material selected from monocrystalline silicon, metal, polymer materials, and ceramics.

[0053] The skin care chip A has various specific forms, which will be further explained below through some embodiments. The skin care chip A of the present invention can be used as a consumable with an instrument; therefore, a skin care instrument B will also be described below by way of example. Example 1

[0054] Figure 1 This is a cross-sectional structural schematic diagram of a skin care chip according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the front side of the substrate in one embodiment of a skin care chip of the present invention. Figure 3 This is a schematic diagram of the structure of a skin care chip according to an embodiment of the present invention assembled on a skin care device.

[0055] like Figure 1 , 2 As shown, in this first embodiment, the substrate 1 is a square sheet. The substrate 1 can be made of at least one material selected from single-crystal silicon, metal, polymer material, and ceramic. For example, single-crystal silicon material with 99.9999% purity is used, which has good biocompatibility and sufficient hardness. In this embodiment, the surface of the substrate 1 is processed by 3D etching or wet etching. By removing excess material, the desired structure can be formed on the front side 11 of the substrate 1.

[0056] A limiting portion 3 is formed on the front side 11 of the substrate 1. For example... Figure 1As shown, the cross-sectional shape of the limiting part 3 is rectangular. It is easy to understand that the cross-section of the limiting part 3 can also be trapezoidal or other suitable shapes. For example... Figure 1 As shown, in this embodiment, the top surface 31 of the limiting part 3 is planar. It is easily understood that the top surface 31 of the limiting part 3 can also be an upwardly arched arc surface. For example... Figure 1 As shown, the limiting part 3 forms a side surface 32 on the surface between the top surface 31 and the front surface 11.

[0057] like Figure 2 As shown, in this embodiment, the limiting portions 3 are distributed around the edge 110 of the front surface 11 of the substrate 1, forming a closed square frame. Furthermore, the limiting portions 3 form a cross pattern on the front surface 11 of the substrate 1, which, combined with the square frame, forms a grid structure. This grid-structured limiting portion 3 divides the front surface 11 of the substrate 1 into four blocks, each block containing a micro-protrusion 2. The micro-protrusion 2 has a specific spacing from the adjacent limiting portion. This specific preset spacing can range from 30 micrometers to 2000 micrometers. In some embodiments, the specific preset spacing is preferably from 100 micrometers to 1000 micrometers, and more preferably from 300 micrometers to 600 micrometers. In this embodiment, the micro-protrusion 2 can be a microneedle, a microknife, or a cluster of microneedles. The top 21 of the micro-protrusion 2 is flush with the surface. It should be noted that multiple micro-protrusions 2 can be formed near the side surface 32 of any limiting portion 3, or only one micro-protrusion 2 can be formed. It is easily understood that only one micro-protrusion 2 can be formed in each block.

[0058] like Figure 1 As shown, a shallow groove 4 is also provided on the top surface 31 of the limiting part 3. The shallow groove 4 is used to disperse and guide the active ingredient. Figure 2 As shown, the shallow grooves 4 on adjacent limiting parts 3 can communicate with each other. In this first embodiment, the depth of the shallow grooves 4 is less than the height of the limiting parts 3.

[0059] like Figure 1 As shown, the substrate 1 also has a through hole 5. One end of the through hole 5 is formed on the back surface 12 of the substrate 1, and the other end is formed at the top surface 31 of the limiting portion 3 and communicates with the shallow groove 4. Figure 1 As shown, there are multiple through holes 5, each independently connecting the back surface 12 of the substrate and the top surface 31 of the limiting portion 3. It is easy to understand that the through holes 5 can also be connected to each other to a channel, the end of which is connected to the back surface 12 of the substrate.

[0060] like Figure 3 As shown, skin care chip A can be mounted on the end of skin care device B. Skin care device B includes a body, a skin care end B1, and a drive module, which drives skin care chip A to reciprocate. In some embodiments, the reciprocating frequency of skin care chip A is no greater than 200 Hz.

[0061] During skincare, the user can hold the skincare device B and slide it across the skin surface. During operation, the device B drives the skincare chip A to reciprocate and press against the skin surface at a specific frequency (no more than 200 Hz). Optionally, the reciprocating frequency of the skincare chip A is between 40 Hz and 80 Hz, such as 50 Hz or 60 Hz. During this reciprocating motion, the micro-protrusions 2 penetrate to a specific depth into the skin surface, weakening the skin's stratum corneum barrier, allowing for efficient absorption of the active ingredients applied to the skin surface or flowing out from the pores 5. Simultaneously with the reciprocating motion of the skincare chip A, the sliding operation causes the chip to simultaneously sweep across the skin surface. During this sweeping motion, the shallow grooves 4, in addition to guiding and diffusing the active ingredients, also scrape the active ingredients onto the skin surface, further promoting their diffusion, distribution, and absorption through massage. Example 2

[0062] Figure 4 This is a cross-sectional structural schematic diagram of a second embodiment of a skin care chip according to the present invention. Figure 5 This is a schematic diagram of the front side of the substrate in Embodiment 2 of the skin care chip of the present invention. Figure 5 As shown, in this second embodiment, the substrate 1 is rectangular. More preferably, the substrate 1 is elongated with a large aspect ratio (the ratio of the long side to the short side). This elongated structural design effectively reduces the overall area of ​​the skin care chip A while maintaining a large treatment length. When using the skin care chip A for skin care, moving along the short side of the substrate 1 allows the long side of the skin care chip to maintain a large treatment size and high treatment efficiency.

[0063] like Figure 4 , 5 As shown, in this second embodiment, the limiting part 3 is formed at the center of the front side 11 of the substrate. The limiting part 3 is in the shape of a square boss. It is easy to imagine that the limiting part 3 can also be designed into a rectangular platform, cylindrical platform, polygonal prism platform, trapezoidal platform, or other suitable shape by etching. Multiple rows of micro protrusions 2 are arranged around the limiting part 3, and each row of micro protrusions 2 has a specific distance from the side surface 32 of the limiting part. The closer the micro protrusion is to the limiting part 3, the shallower its penetration depth into the skin. It should be noted that, as Figure 5 As shown, in this embodiment, the micro protrusions 2 are distributed near the side 32 of the limiting part. This includes the case where the position of the micro protrusion 2 is directly opposite the side 32 of the limiting part, such as the micro protrusions on the left, right and top and bottom sides of the limiting part 3; and the case where the position of the micro protrusion 2 is not directly opposite the side 32 of the limiting part, such as the micro protrusions opposite the four edges of the limiting part 3.

[0064] like Figure 4 ,5 As shown, in this second embodiment, micro-protrusions 2 are arranged at the edge 110 of the front side 11 of the substrate. These micro-protrusions 2 have a larger aspect ratio and are correspondingly sharper. Therefore, in this second embodiment, there are two types of micro-protrusions 2 with different aspect ratios on the front side 11 of the substrate 1. In this embodiment, the height of the micro-protrusions ranges from 1 to 1000 micrometers, and the bottom width ranges from 1 to 1000 micrometers. It is easy to understand that the micro-protrusions 2 located at the edge 110 can be understood as replacing the limiting portion 3 in the first embodiment in terms of orientation. Example 3

[0065] Figure 6 This is a cross-sectional structural diagram of a third embodiment of the skin care chip of the present invention. Figure 7 This is a schematic diagram of the front side of the substrate in Embodiment 3 of the skin care chip of the present invention. Figure 6 , 7 As shown, in this third embodiment, the substrate 1 is a flat, thin plate. A set of opposing limiting portions 3 are formed at a pair of edges 110 on the front side of the substrate. Multiple rows of micro-protrusions 2 are formed between the limiting portions 3. For example... Figure 6 As shown, in this embodiment, the micro protrusions 2 have the same height, and their top ends 21 are on the same plane. The height of the limiting part 3 is greater than the height of the micro protrusions 2, and the top surface of the limiting part 3 is parallel to the top plane of the micro protrusions 2.

[0066] In this embodiment, each row of micro-protrusions 2 has a corresponding preset distance from the side surface 32 of the limiting part 3, and the preset distance between each row of micro-protrusions 2 and the side surface 32 of the limiting part is positively correlated with the depth of the micro-protrusions 2 penetrating the skin. It should be noted that multiple rows of micro-protrusions 2 can be formed between the two limiting parts 3, or only one row of micro-protrusions 2 or one micro-protrusion 2 can be formed. Example 4

[0067] Figure 8 This is a schematic diagram of the front side of the substrate in Embodiment 4 of the skin care chip of the present invention. Figure 8 As shown, unlike Embodiment 3, in this Embodiment 4, the limiting portion 3 is formed only on one side edge of the front surface 11 of the substrate. The preset distance between each row of micro protrusions 2 and the side surface 32 of the limiting portion is positively correlated with the depth to which the micro protrusions 2 penetrate the skin; the further away the micro protrusions are from the limiting portion 3, the deeper they can penetrate the skin. Example 5

[0068] Figure 9 This is a schematic diagram of the front side of the substrate in Embodiment 5 of the skin care chip of the present invention. Figure 9As shown, unlike Embodiment 3, in this Embodiment 5, the limiting portion 3 is formed on the edge of the front side 11 of the substrate and surrounds it in a ring shape. The skin care chip with this structure has the following characteristics: the micro protrusion 2 near the center of the substrate 1 is farther from the limiting portion 3 and has a deeper puncture depth; the micro protrusion 2 near the limiting portion 3 has a shallower puncture depth, thereby forming a skin care effect of deep puncture in the middle and shallow puncture around the edges. Example 6

[0069] Figure 10 This is a cross-sectional structural schematic diagram of a sixth embodiment of the skin care chip of the present invention. Figure 10 As shown, unlike Embodiment 3, in this Embodiment 6, the micro protrusions 2 have the same height, and their top ends 21 are on the same plane. The height of the limiting part 3 is equal to the height of the micro protrusions 2, and the micro protrusions 2 and the limiting part 3 are on the same plane. Example 7

[0070] Figure 11 This is a cross-sectional structural diagram of a seventh embodiment of the skin care chip of the present invention. Figure 11 As shown, unlike Embodiment 3, in this Embodiment 7, the micro protrusions 2 have the same height, and their top ends 21 are on the same plane. The height of the limiting part 3 is less than the height of the micro protrusions 2. Example 8

[0071] Figure 12 This is a cross-sectional structural schematic diagram of an eighth embodiment of a skin care chip according to the present invention. Figure 12 As shown, in this embodiment eight, the micro-protrusions 2 have the same height, and their top ends 21 are on the same plane. Unlike embodiment three, the micro-protrusions 2 have two different aspect ratios. The height of the micro-protrusions ranges from 1 to 1000 micrometers, and the bottom width ranges from 1 to 1000 micrometers. In this embodiment eight, the aspect ratio of the micro-protrusions 2 near the limiting portion 3 is greater than that of the micro-protrusions 2 far from the limiting portion 3. It is readily understood that in some other embodiments, the aspect ratio of the micro-protrusions 2 at different positions can be adjusted as needed. Example 9

[0072] Figure 13 This is a schematic diagram of the front side of the substrate in Embodiment 9 of the skin care chip of the present invention. Figure 13 As shown, in this embodiment nine, the front surface of the substrate 1 has a rectangular structure. Multiple limiting portions 3 are arrayed on the front surface 11 of the substrate. It is easily understood that the limiting portions 3 can have the same height or different heights. The size of the limiting portions 3 can be adjusted according to the substrate size and array arrangement design requirements. Figure 13As shown, micro protrusions 2 are distributed around each limiting part 3. It should be noted that multiple micro protrusions 2 can be formed between any two adjacent limiting parts 3, or only one micro protrusion 2 can be formed.

[0073] like Figure 13 As shown, a through hole 5 is also formed on the substrate 1. One end of the through hole 5 extends to the back side of the substrate, and the other end of the through hole 5 is formed on the top surface of the limiting part 3. Example 10

[0074] Figure 14 This is a schematic diagram of the front side of the substrate in Embodiment 10 of the skin care chip of the present invention. Figure 14 As shown, in this embodiment ten, the front side 11 of the substrate 1 has a square structure. The limiting portions 3 are distributed in a cross shape on the substrate 1, and each limiting portion 3 has four extensions 302 and a central portion 301. Figure 14 As shown, a shallow groove 4 is formed on the top surface of each extension 302, and the number of shallow grooves 4 can be one, two, three, or more. In this embodiment, the shallow groove 4 on each extension 302 is parallel to the adjacent edge of the substrate. Figure 14 As shown, the substrate 1 of this embodiment also has a through hole 5. One end of the through hole 5 is formed on the back side of the substrate 1, and the other end forms the top surface of the central portion 302.

[0075] like Figure 14 As shown, in this embodiment, the limiting part 3 divides the front side 11 of the substrate into four blocks. Four micro-protrusions 2 are formed in each block. In this embodiment, the micro-protrusions in each block are arranged in a 2x2 square array. The preset distance between each micro-protrusion 2 and the side surface 302 of the limiting part 3 is 100 micrometers to 1000 micrometers; optionally, the preset distance is between 300 micrometers and 600 micrometers. In a preferred arrangement, the top surface of each extension 302 has three shallow grooves 4, which are equidistantly arranged. Each micro-protrusion 2 in each block is distributed between the extension lines of two adjacent shallow grooves 4 (e.g., ...). Figure 14 (As shown by the dotted line in the lower left corner of the block). This design allows the active ingredients and essence drained from the shallow groove 4 to be efficiently dispersed between the micro protrusions 2.

[0076] During skincare, the user attaches skincare chip A to the end of skincare device B and holds device B, gliding it across the skin's surface. During operation, device B drives chip A to reciprocate and press against the skin at a specific frequency (no more than 200 Hz). Simultaneously with the reciprocating motion of chip A, the gliding motion causes chip A to sweep horizontally across the skin's surface. During this sweeping motion, the shallow groove 4, in addition to its function of draining and diffusing active ingredients, also scrapes the active ingredients onto the skin's surface, further promoting diffusion and absorption. Example 11

[0077] Figure 15 This is a schematic diagram of the front structure of the substrate in Embodiment Eleven of the present invention, which is a skin care chip. Unlike Embodiment Ten, as shown in... Figure 15 As shown, the skin care chip layout in this embodiment eleven has through holes 5. The active ingredients applied to the skin surface are diverted and diffused through shallow grooves 4, and quickly distributed to the skin surface. Example 12

[0078] Figure 16 This is a schematic diagram of the front structure of the substrate in Embodiment Twelve of the present invention, which is a skin care chip. Unlike Embodiment Ten, as shown in... Figure 16 As shown, in this embodiment 12, the arrangement of the shallow grooves 4 on each extension 302 is changed. Specifically, the shallow groove 4 on each extension 302 is perpendicular to the adjacent substrate edge. It is conceivable that in some embodiments, the shallow groove 4 may extend to directly communicate with the through hole 5.

Claims

1. A skin care chip, comprising a substrate, wherein micro-protrusions are formed on the front side of the substrate, characterized in that, One or more limiting portions are also formed on the front side. The limiting part has a top surface that can contact the skin. The limiting portion also has one or more side surfaces, which are formed between the top surface and the front surface of the substrate; The micro protrusions are distributed near at least one side of the limiting portion, and there is a preset distance between the micro protrusions and the side. When the skin care chip is applied to the skin, the top surface presses against the skin, causing the skin around the limiting portion to continuously indent. The micro protrusions near the limiting portion with the preset spacing can penetrate the skin to a preset depth.

2. The skin care chip according to claim 1, characterized in that, The preset spacing is not less than 30 micrometers and not more than 2000 micrometers.

3. The skin care chip according to claim 1, characterized in that, The front side of the substrate is rectangular.

4. The skin care chip according to claim 1, characterized in that, The limiting part, the micro protrusion, and the substrate are an integral structure.

5. The skin care chip according to claim 4, characterized in that, The material used to manufacture the micro-protrusions is at least one of the following: metallic materials, polymeric materials, inorganic crystalline materials, inorganic amorphous materials, and modified materials.

6. The skin care chip according to claim 1, characterized in that, The tops of the micro protrusions are on the same plane, and the top surface of the limiting part is parallel to the plane.

7. The skin care chip according to claim 6, characterized in that, The micro-protrusions are cone-shaped, and the ratio of the height of the micro-protrusion to the width of its bottom is the aspect ratio. At least two types of micro-protrusions with different aspect ratios are present on the front side of the substrate.

8. The skin care chip according to claim 6, characterized in that, The height of the limiting part is greater than or equal to the height of the micro protrusion.

9. The skin care chip according to claim 6, characterized in that, The height of the limiting part is less than the height of the micro protrusion.

10. The skin care chip according to claim 1, characterized in that, The limiting portion is formed on the edge of the front side of the substrate.

11. The skin care chip according to claim 1, characterized in that, The limiting portion is formed at the center of the front side of the substrate.

12. The skin care chip according to claim 1, characterized in that, The limiting parts are arranged in an array on the front side of the substrate.

13. The skin care chip according to claim 1, characterized in that, The limiting portion forms a grid structure and divides the front side of the substrate into one or more blocks, with the micro protrusions distributed in each of the blocks.

14. The skin care chip according to claim 13, characterized in that, A shallow groove is formed on the top surface of the limiting part.

15. The skin care chip according to claim 1, characterized in that, A through hole is also formed on the substrate, with one end of the through hole formed on the back side of the substrate and the other end of the through hole formed on the limiting portion.

16. A skin care device, characterized in that, Includes a body, a skin care terminal, a driving module, and a skin care chip as described in any one of claims 1-15; The skin care chip is detachably mounted on the skin care end. The drive module can drive the skin care chip to reciprocate to repeatedly contact, separate from and care for the skin. The reciprocating frequency of the skin care chip is no greater than 200 Hz.

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