Roller microneedle device

Abstract

The utility model relates to a roller microneedle device which comprises a roller, a left end cover, a right end cover and a microneedle assembly, the left end cover is arranged at the left end of the roller in a sleeving mode, and the right end cover is arranged at the right end of the roller in a sleeving mode; the micro-needle assembly comprises a base plate and micro-needles arranged and fixed on the upper surface of the base plate in an array mode, the base plate wraps the outer side wall of the roller, the top of each micro-needle is a platform after the base plate is unfolded, and the heights of all the micro-needles are consistent; the microneedle has no needle tip, and the height of the microneedle is 50-600 [mu] m; the diameter of the bottom of the microneedle is 50-300 [mu] m, and the diameter of the top of the microneedle is 1-100 [mu] m. The roller microneedle device has the advantages of being convenient to operate, safe and reliable.

Description

Technical Field

[0001] This utility model relates to a roller microneedle device. Background Technology

[0002] With the changing pace of life, more and more people are paying attention to beauty and health maintenance, especially women, who are particularly focused on skin care, which mainly involves whitening, wrinkle removal, and freckle and scar removal.

[0003] Currently available skincare products typically involve applying serums or masks. These methods offer limited and slow-acting results, and the nutrients in these products only remain on the skin's surface, making absorption difficult. Several technologies allow for direct skin absorption. One is microneedling, which delivers nutrients directly to the skin through microneedles. However, controlling the nutrient solution on the microneedles during this process is challenging. Thread lifting, often marketed as a treatment, uses threads that are merely decorative and ineffective, often made from recycled silk waste, which not only lacks benefits but can also cause skin damage. Another method is ultrasonic thread lifting, which uses ultrasound to treat the skin. While ultrasound can effectively and quickly reach skin cells, it is difficult to control and can damage healthy cells in the process.

[0004] Meanwhile, traditional microneedles are made of metal materials using traditional processes. However, most microneedle arrays and microneedle sheets that have appeared on the market in the past decade are made using new technologies. These new technologies employ ultra-micro processes, using materials such as monocrystalline silicon, medical alloys, and polymer materials to create smaller microneedles. They are widely used in the beauty industry and, when used in conjunction with cosmetic or medical device liquid products, have achieved significant social and economic benefits. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, the main objective of this utility model is to provide a roller microneedle device.

[0006] The technical solution of this utility model is as follows:

[0007] A roller microneedle device includes a roller, a left end cap, a right end cap, and a microneedle assembly, wherein: the left end cap is sleeved on the left end of the roller, and the right end cap is sleeved on the right end of the roller;

[0008] The microneedle assembly includes a substrate and microneedles arranged in an array and fixed on the upper surface of the substrate. The substrate covers the outer side wall of the roller. When the substrate is unfolded, the top of the microneedles forms a platform, and all the microneedles have the same height.

[0009] The microneedle has no tip and the height of the microneedle is 50-600um;

[0010] The bottom diameter of the microneedle is 50-300 μm, and the top diameter of the microneedle is 1-100 μm.

[0011] The microneedle is a hollow needle, a solid needle, or a combination of hollow and solid needles, and the shape of the microneedle is a frustum conical.

[0012] The outer side wall of the roller is provided with one or more mounting grooves along the circumferential direction. The left end of the mounting groove extends to the left side wall of the roller, and the right end of the mounting groove extends to the right side wall of the roller.

[0013] The mounting groove is provided with a locking protrusion to make the substrate tightly cover the outer wall of the roller. The left side of the locking protrusion is flush with the left end face of the roller, and the right side of the locking protrusion is flush with the right end face of the roller.

[0014] When the number of mounting grooves is one, one end of the substrate is provided with a first bending portion, and the first bending portion is located on one side inside the mounting groove. The other end of the substrate is provided with a second bending portion, and the second bending portion is located on the other side inside the mounting groove.

[0015] The outer wall of the clamping protrusion is provided with a plurality of evenly distributed massage protrusions.

[0016] The mounting groove is formed by the inward indentation of the outer side wall of the roller along the direction of the central axis, and the cross-section of the mounting groove is an inverted isosceles trapezoid.

[0017] Two first fixing holes are provided through the outer side wall of one end of the substrate, and a first fastening screw is provided in the first fixing hole;

[0018] Two second fixing holes are provided through the outer wall of the other end of the substrate, and a second fastening screw is provided in the second fixing hole;

[0019] The substrate is fixedly connected to the roller by the first fastening screw and the second fastening screw.

[0020] The top of the front sidewall of the mounting groove is designed with an arc at the junction with the outer sidewall of the roller, and the top of the rear sidewall of the mounting groove is also designed with an arc at the junction with the outer sidewall of the roller.

[0021] The right side wall of the left end cover is recessed to form a first mounting groove. The outer diameter of the first mounting groove is larger than the outer diameter of the roller. The left end cover is engaged with the left end of the roller through the first mounting groove, and the left end of the substrate is located in the first mounting groove.

[0022] The left side wall of the right end cover is recessed to form a second mounting groove. The outer diameter of the second mounting groove is larger than the outer diameter of the roller. The right end cover is engaged with the right end of the roller through the second mounting groove, and the right end of the substrate is located in the second mounting groove.

[0023] The side of the outer wall of the clamping protrusion is an arc surface, and the multiple massage protrusions are evenly located on the outer wall of the clamping protrusion along the central axis of the roller.

[0024] The bottom side of the clamping protrusion extends downward and is provided with a first clamping positioning post and a second clamping positioning post, and the first clamping positioning post and the second clamping positioning post are of equal height.

[0025] The bottom of the mounting groove is recessed along the direction of the central axis of the roller to form a first clamping groove and a second clamping groove. The first clamping positioning post is disposed in the first clamping groove, and the second clamping positioning post is disposed in the second clamping groove.

[0026] The first and second clamping positioning posts have the same outer diameter, and the first and second clamping positioning posts are integrally formed with the clamping protrusion.

[0027] This utility model has the following advantages and beneficial effects: The roller microneedle device provided in this utility model embodiment includes a roller, a left end cap, a right end cap, and a microneedle assembly. The left end cap is fitted onto the left end of the roller, and the right end cap is fitted onto the right end of the roller. The microneedle assembly includes a substrate and microneedles arranged in an array and fixed on the upper surface of the substrate. The substrate covers the outer side wall of the roller. When the substrate is unfolded, the top of the microneedles is a platform, and all the microneedles have the same height. The microneedles have no needle tips, and the height of the microneedles is 50-600 μm. The bottom diameter of the microneedles is 50-300 μm, and the top diameter of the microneedles is 1-100 μm. Through the above design, the roller microneedle device of this utility model has the characteristics of convenient operation and safe and reliable operation. Attached Figure Description

[0028] Figure 1 A three-dimensional structural diagram of the roller microneedle device provided in an embodiment of this utility model.

[0029] Figure 2 This is an exploded structural diagram of the roller microneedle device provided in one direction according to an embodiment of the present invention.

[0030] Figure 3 This is an exploded view of the roller microneedle device provided in another embodiment of the present invention.

[0031] Figure 4 This is an exploded structural diagram showing the interaction between the roller, microneedle assembly, and clamping protrusion provided in an embodiment of the present invention.

[0032] Figure 5 This is an exploded structural diagram of the roller and microneedle assembly provided in an embodiment of the present invention.

[0033] Figure 6 A three-dimensional structural diagram of the microneedle assembly provided in an embodiment of this utility model.

[0034] Figure 7 This is an exploded structural diagram showing the interaction between the roller and the locking protrusion in an embodiment of the present invention.

[0035] Figure 8 An enlarged three-dimensional structural diagram of the roller provided in an embodiment of this utility model.

[0036] Figure 9 An enlarged three-dimensional structural diagram of the clamping protrusion provided in an embodiment of this utility model.

[0037] Figure 10 This is a top view of the unfolded structure of the microneedle assembly provided in an embodiment of the present invention.

[0038] Figure 11 This is a schematic diagram of the unfolded microneedle assembly provided in an embodiment of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1 to 11 The following is an illustration of a roller microneedle device provided in an embodiment of the present invention: It includes a roller 100, a left end cap 101, a right end cap 102, and a microneedle assembly 200. The left end cap 101 is fitted onto the left end of the roller 100, and the right end cap 102 is fitted onto the right end of the roller 100. The microneedle assembly 200 includes a substrate 201 and microneedles 202 arranged in an array and fixed to the upper surface of the substrate 201.

[0044] The microneedles 202 are tipless and have a height of 50-600 μm. The substrate 201 covers the outer wall of the roller 100. When the substrate 201 is unfolded, the top of the microneedles 202 forms a platform. All the microneedles 202 have the same height. The bottom diameter of the microneedles 202 is 50-300 μm, and the top diameter is 1-100 μm. The substrate 201 and the microneedles 202 are mainly made of monocrystalline silicon, medical-grade metal materials, and polymer materials. That is, the substrate 201 is a flexible substrate, which facilitates the covering of the roller 100.

[0045] In this invention, the outer wall of the substrate 201 is flush with the outer wall of the left end cover 101 or the right end cover 102. That is, after the substrate 201 is covered on the roller 100, the sum of the thickness of the substrate 201 and the radius of the roller 100 is equal to the radius of the left end cover 101 or the right end cover 102. At the same time, the outer wall of the substrate 201 may not be flush with the outer wall of the left end cover 101 or the right end cover 102. That is, after the substrate 201 is covered on the roller 100, the sum of the thickness of the substrate 201 and the radius of the roller 100 is not equal to the radius of the left end cover 101 or the right end cover 102. This design not only facilitates the initial assembly but also allows for automated production, thereby improving production efficiency.

[0046] Meanwhile, the substrate 201 can also be made of hyaluronic acid, silk fibroin, or other functional nutrient solutions, allowing for direct absorption by the skin and resulting in a lifting and firming effect. Furthermore, it can be used in conjunction with various functional skincare products, such as those for acne treatment, anti-wrinkle, whitening, and breast enhancement. The substrate not only serves as a carrier for microneedles but also allows the nutrient solution to act directly on the skin, penetrating directly into the skin.

[0047] Because microneedles 202 are added to the substrate 201 of this invention, the microneedles can directly enter the skin, which helps the nutrients penetrate into the dermis layer of the skin, further aiding absorption and providing beauty and skincare effects.

[0048] The microneedles of this invention are short (202 needles), only piercing the stratum corneum of the skin. They are painless, non-invasive, and do not cause bleeding. They are easy to use, and the skin absorbs them quickly. You can perform skin care anytime, anywhere, at home or while traveling.

[0049] The microneedle 202 is a hollow needle, a solid needle, or a combination of hollow and solid needles. That is, the microneedle 202 can be a combination of some solid needles and some hollow needles. The shape of the microneedle 202 is a frustum conical shape.

[0050] The outer side wall of the roller 100 is provided with one or more mounting grooves 103 along the circumferential direction. The left end of the mounting groove 103 extends to the left side wall of the roller 100, and the right end of the mounting groove 103 extends to the right side wall of the roller 100.

[0051] The mounting groove 103 is provided with a clamping protrusion 104 so that the substrate 201 tightly covers the outer side wall of the roller 100. The left side of the clamping protrusion 104 is flush with the left end face of the roller 100, and the right side of the clamping protrusion 104 is flush with the right end face of the roller 100.

[0052] The outer wall of the clamping protrusion 104 is provided with a plurality of evenly distributed massage protrusions 105.

[0053] When there is one mounting groove 103, one end of the substrate 201 is provided with a first bending portion 210, and the first bending portion 210 is located on one side inside the mounting groove 103. The other end of the substrate 201 is provided with a second bending portion 220, and the second bending portion 220 is located on the other side inside the mounting groove 103.

[0054] Through the above design, that is, the combination of the microneedle assembly 200 and the roller 100, the fixed connection between the microneedle assembly 200 and the roller 100 can be achieved by providing one or more mounting grooves 103 on the outer wall of the roller 100 and the corresponding locking protrusions 104. When a mounting groove 103 is provided on the outer wall of the roller 100, the number of locking protrusions 104 is also one. When the substrate 201 covers the outer wall of the roller 100, the locking protrusion 104 is engaged in the mounting groove 103 to achieve a tight fit between the substrate 201 and the roller 100. At the same time, by providing a first bending portion 210 and a second bending portion 220 at both ends of the substrate 201, and when the substrate 201 covers the roller 100, the first bending portion 210 is located in the mounting groove 103. One side wall inside, and the second bent portion 220 is located on the other side wall inside the mounting groove 103. After the clamping protrusion 104 is engaged in the mounting groove 104, one side wall of the clamping protrusion 104 firmly abuts the first bent portion 210 against one inner side wall of the mounting groove 103, and the other side wall of the clamping protrusion 104 firmly abuts the second bent portion 220 against the other inner side wall of the mounting groove 103. The safety and reliability are further enhanced, thereby achieving the purpose of extending the service life of the roller microneedle device.

[0055] The mounting groove 103 is formed by the inward indentation of the outer side wall of the roller 100 along the direction of the central axis, which facilitates the early processing, and the cross-section of the mounting groove 103 is an inverted isosceles trapezoid.

[0056] The top of the front sidewall of the mounting groove 103 and the outer sidewall of the roller 100 are designed with an arc, and the top of the rear sidewall of the mounting groove 103 and the outer sidewall of the roller 100 are designed with an arc.

[0057] Meanwhile, the microneedle assembly 200 and the roller 100 can be bonded and fixed using double-sided tape or glue; alternatively, the following embodiments can be used:

[0058] Two first fixing holes 211 are provided through the outer side wall of one end of the substrate 201, and a first fastening screw is provided in the first fixing hole 211; two second fixing holes 212 are provided through the outer side wall of the other end of the substrate 201, and a second fastening screw is provided in the second fixing hole 212; the substrate 201 is fixedly connected to the roller 100 by the first fastening screw and the second fastening screw, which facilitates the initial assembly and subsequent maintenance and replacement, and also improves the firmness of the connection between the substrate 201 and the roller 100, thereby improving safety and reliability.

[0059] Meanwhile, by providing a first fixing hole 211 and a second fixing hole 212 at both ends of the substrate 201, and by providing a first fastening screw and a second fastening screw in the first fixing hole 211 and the second fixing hole 212 respectively, the substrate 201 can be firmly fixed on the outer wall of the roller 100, that is, the microneedle assembly 200 is tightly and firmly fixed on the outer wall of the roller 100, thereby improving safety and reliability.

[0060] The right side wall of the left end cover 101 has a recessed first mounting groove 111 to facilitate preliminary processing. The outer diameter of the first mounting groove 111 is larger than the outer diameter of the roller 100. The left end cover 101 is secured to the left end of the roller 100 via the first mounting groove 111, and the left end of the substrate 201 is located in the first mounting groove 111. Through this design, specifically by providing the first mounting groove 111 on the right side of the left end cover 101, when the substrate 201 covers the roller 100, the left end cover 101 is fitted onto the left end of the roller 100 via the first mounting groove 111. The first mounting groove 111 tightly fixes the left end of the substrate 201 within the receiving space formed between the inner side wall of the first mounting groove 111 and the outer side wall of the left end of the roller 100, thereby enhancing the firmness of the connection between the left end of the substrate 201 and the left end of the roller 100.

[0061] The left side wall of the right end cover 102 has a recessed second mounting groove 112. The outer diameter of the second mounting groove 112 is larger than the outer diameter of the roller. The right end cover 102 is engaged with the right end of the roller 100 through the second mounting groove 112, and the right end of the substrate 201 is located in the second mounting groove 112. Through this design, that is, by providing the second mounting groove 112 on the left side of the right end cover 102, when the substrate 201 covers the roller 100, the right end cover 102 is fitted onto the right end of the roller 100 through the second mounting groove 112, and the right end of the substrate 201 is tightly fixed within the receiving space formed between the inner side wall of the second mounting groove 112 and the outer side wall of the right end of the roller 100, thereby enhancing the firmness of the connection between the right end of the substrate 201 and the right end of the roller 100.

[0062] The locking protrusion 104 has a left side 147, a right side, a rear side 141, a front side 142, a bottom side 143, and a top side 144. The left side 147 and the right side are symmetrically arranged on the left and right sides of the locking protrusion 104, respectively. The top side 144 is an arc surface. Multiple massage protrusions 105 are evenly located on the top side 144 along the central axis of the roller 100. Through this design, multiple massage protrusions 105 are evenly arranged on the outer wall of the locking protrusion 104. During the rolling of the roller 100, the microneedles 202 pierce the stratum corneum, allowing the nutrient solution to reach the deep layers of the skin. The massage protrusions 105 stimulate acupoints, achieving a massage effect and improving the absorption efficiency of the nutrient solution.

[0063] The clamping protrusion 104 has a first clamping positioning post 145 and a second clamping positioning post 146 extending downwards on the bottom side surface 143, and the heights of the first clamping positioning post 145 and the second clamping positioning post 146 are equal. The bottom of the mounting groove 103 is recessed along the direction of the central axis of the roller 100 to form a first clamping groove 131 and a second clamping groove 132. The first clamping positioning post 145 is disposed in the first clamping groove 131, and the second clamping positioning post 146 is disposed in the second clamping groove 132. With the above design, a first clamping positioning post 145 and a second clamping positioning post 146 are provided extending downward from the bottom side of the clamping protrusion 104, and a first clamping groove 131 and a second clamping groove 132 are provided at the bottom of the mounting groove 104. When the clamping protrusion 104 is engaged in the mounting groove 103, the first clamping positioning post 145 is engaged in the first clamping groove 131, and the second clamping positioning post 146 is engaged in the second clamping groove 132. This allows the clamping protrusion 104 to be firmly engaged in the mounting groove 104, further improving safety and reliability.

[0064] The first locking positioning post 145 and the second locking positioning post 146 have the same outer diameter, and are integrally formed with the locking protrusion 104. This design, where the first locking positioning post 145 and the second locking positioning post 146 are both integrally formed with the locking protrusion 104, facilitates initial cost reduction and increases the firmness of the connection between the first locking positioning post 145 and the second locking positioning post 146 and the locking protrusion 104, thereby extending service life.

[0065] In this invention, the substrate 201 can also be made of hyaluronic acid, and the microneedles 202 can also be made of hyaluronic acid. The microneedles 202 are truncated cones, with a bottom diameter of 200 μm and a height of 300 μm. The spacing between the microneedles 202 is 0.8 mm, which helps the nutrient solution penetrate deep into the dermis of the skin. The microneedles 202 are arranged in an array on the substrate 201.

[0066] To further meet practical application needs and enhance the effectiveness of the application, the preferred solution uses silk fibroin for both the substrate 201 and the microneedles 202. The bottom diameter of the microneedles 202 is 200 μm, and the height of the microneedles 202 is 600 μm. The height of the microneedles is set to 600 μm to facilitate penetration of the stratum corneum and allow the nutrient solution to reach the deep layers of the skin. The spacing between adjacent microneedles 202 is 0.6 mm, and the microneedles 202 are arranged in an array on the substrate 201.

[0067] Compared to traditional beauty and skincare products, where beauty serums enter the skin's surface through small pores, this invention directly introduces the beauty serum into the skin's surface. This not only improves the efficiency of beauty treatments but also prevents the serum from being contaminated by external factors, allowing for the direct and hygienic introduction of uncontaminated beauty serum into the skin.

[0068] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A roller microneedle device, characterized in that: It includes a roller, a left end cap, a right end cap, and a microneedle assembly, wherein: the left end cap is fitted onto the left end of the roller, and the right end cap is fitted onto the right end of the roller; The microneedle assembly includes a substrate and microneedles arranged in an array and fixed on the upper surface of the substrate. The substrate covers the outer side wall of the roller. When the substrate is unfolded, the top of the microneedles forms a platform, and all the microneedles have the same height. The microneedle has no tip and the height of the microneedle is 50-600um; The bottom diameter of the microneedle is 50-300 μm, and the top diameter of the microneedle is 1-100 μm.

2. The roller microneedle device according to claim 1, characterized in that, The microneedles are hollow needles, solid needles, or a combination of hollow and solid needles.

3. The roller microneedle device according to claim 1, characterized in that, The microneedle is shaped like a frustum of a cone, and the tip of the microneedle is located on the outer side of the outer wall of the left or right end cap.

4. The roller microneedle device according to claim 1, characterized in that, The outer side wall of the roller is provided with one or more mounting grooves along the circumferential direction. The left end of the mounting groove extends to the left side wall of the roller, and the right end of the mounting groove extends to the right side wall of the roller.

5. The roller microneedle device according to claim 4, characterized in that, The mounting groove is provided with a locking protrusion to make the substrate tightly cover the outer wall of the roller. The left side of the locking protrusion is flush with the left end face of the roller, and the right side of the locking protrusion is flush with the right end face of the roller.

6. The roller microneedle device according to claim 4, characterized in that, When the number of mounting grooves is one, one end of the substrate is provided with a first bending portion, and the first bending portion is located on one side inside the mounting groove. The other end of the substrate is provided with a second bending portion, and the second bending portion is located on the other side inside the mounting groove.

7. The roller microneedle device according to claim 5, characterized in that, The outer wall of the clamping protrusion is provided with a plurality of evenly distributed massage protrusions.

8. The roller microneedle device according to claim 4, characterized in that, The mounting groove is formed by the inward indentation of the outer side wall of the roller along the direction of the central axis, and the cross-section of the mounting groove is an inverted isosceles trapezoid.

9. The roller microneedle device according to claim 1, characterized in that, Two first fixing holes are provided through the outer side wall of one end of the substrate, and a first fastening screw is provided in the first fixing hole; Two second fixing holes are provided through the outer wall of the other end of the substrate, and a second fastening screw is provided in the second fixing hole; The substrate is fixedly connected to the roller by the first fastening screw and the second fastening screw.

10. The roller microneedle device according to claim 8, characterized in that, The top of the front sidewall of the mounting groove is designed with an arc at the junction with the outer sidewall of the roller, and the top of the rear sidewall of the mounting groove is also designed with an arc at the junction with the outer sidewall of the roller.

11. The roller microneedle device according to claim 1, characterized in that, The right side wall of the left end cover is recessed to form a first mounting groove. The outer diameter of the first mounting groove is larger than the outer diameter of the roller. The left end cover is engaged with the left end of the roller through the first mounting groove, and the left end of the substrate is located in the first mounting groove.

12. The roller microneedle device according to claim 1, characterized in that, The left side wall of the right end cover is recessed to form a second mounting groove. The outer diameter of the second mounting groove is larger than the outer diameter of the roller. The right end cover is engaged with the right end of the roller through the second mounting groove, and the right end of the substrate is located in the second mounting groove.

13. The roller microneedle device according to claim 7, characterized in that, The side of the outer wall of the clamping protrusion is an arc surface, and the multiple massage protrusions are evenly located on the outer wall of the clamping protrusion along the central axis of the roller.

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