Roller microneedle device

Abstract

The invention 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 beneficial effects that the roller microneedle device is convenient to operate, safe and reliable.

Description

Technical Field

[0001] The invention relates to a roller microneedle device. Background Art

[0002] With the change of the pace of life, more and more people pay attention to the maintenance of beauty and health. Among them, ladies pay more attention to it, especially in skin care, and skin care is nothing more than whitening, wrinkle removal, freckle removal and scar removal and other aspects.

[0003] At present, the skin care products available on the market generally apply beauty serum or apply facial mask. The beauty care effects of these two methods are not significant and the effects come slowly. Moreover, all kinds of nutrient solution skin care products only stay on the surface of the skin and are difficult for the skin to absorb. There are several technologies that can be directly absorbed by the skin. One of them is microneedle beauty technology, which infuses nutrients into the skin through the contact between microneedles and the skin. During the infusion process, it is difficult to control the nutrient solution on the microneedles. The thread beauty claimed on the market is just a decoration and does not play any role. Moreover, most of the threads are made of silk waste. Not only do they have no good effects, but they also have side effects and damage the skin when used on the skin. Another one is radar thread carving, which uses ultrasound to beautify the skin. Ultrasound can indeed act on the skin cells quickly and effectively to beautify the skin, but ultrasound is difficult to control. It will also kill good cells while using it, causing certain damage to the skin.

[0004] Meanwhile, traditional microneedles are made of metal materials and through traditional processes. In the past 10 years, most of the microneedle arrays and microneedle sheets that have appeared on the market are made of new technologies. The new technology uses ultra-micro technology, and the materials are single crystal silicon, medical alloys, polymer materials, etc. to make new microneedles with relatively small sizes. It is widely used in the beauty industry, and is combined with cosmetic liquid products or medical liquid products, achieving good social and economic benefits. Summary of the invention

[0005] In view of the above problems existing in the prior art, the main purpose of the present invention is to provide a roller microneedle device.

[0006] The technical solution of the present invention is as follows:

[0007] A roller microneedle device comprises 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, wherein the substrate is coated on the outer wall of the roller, and when the substrate is unfolded, the top of the microneedles is a platform, and the heights of all the microneedles are consistent;

[0009] The microneedle has no needle tip, and the microneedle height 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 or a solid needle or a combination of a hollow needle and a solid needle, and the shape of the microneedle is a truncated cone.

[0012] The microneedle is made of any one of single crystal silicon, medical alloy material, polymer material, hyaluronic acid or silk protein.

[0013] One or more mounting grooves are arranged on the outer side wall of the roller in 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.

[0014] A clamping protrusion is provided in the mounting groove so that the substrate is tightly wrapped around the outer wall of the roller, the left side of the clamping protrusion is flush with the left end face of the roller, and the right side of the clamping protrusion is flush with the right end face of the roller.

[0015] When the number of the mounting grooves is one, a first bending portion is provided at one end of the substrate, and the first bending portion is located on one side inside the mounting groove, and a second bending portion is provided at the other end of the substrate, and the second bending portion is located on the other side inside the mounting groove.

[0016] A plurality of evenly distributed massage convex parts are arranged on the outer side wall of the clamping convex part.

[0017] The installation groove is formed by the outer side wall of the roller being concave in the direction of the central axis, and the cross section of the installation groove is an inverted isosceles trapezoid.

[0018] Two first fixing holes are provided through the outer wall of one end of the substrate, and first fastening screws are provided in the first fixing holes;

[0019] Two second fixing holes are provided through the outer wall of the other end of the substrate, and second fastening screws are provided in the second fixing holes;

[0020] The base plate is fixedly connected to the roller by the first fastening screw and the second fastening screw.

[0021] The position where the top of the front side wall of the mounting groove is combined with the outer side wall of the roller is designed as an arc, and the position where the top of the rear side wall of the mounting groove is combined with the outer side wall of the roller is designed as an arc.

[0022] The right side wall of the left end cover is concave 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 clamped on 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.

[0023] The left side wall of the right end cover is concave 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 clamped on the right end of the roller through the second mounting groove, and the right end of the base plate is located in the second mounting groove.

[0024] The side surface where the outer wall of the clamping protrusion is located is an arc surface, and the plurality of massage protrusions are evenly located on the outer wall of the clamping protrusion in the direction of the central axis of the roller.

[0025] A first clamping positioning column and a second clamping positioning column are provided downwardly extending from the bottom side surface of the clamping protrusion, and the first clamping positioning column and the second clamping positioning column have the same height.

[0026] The bottom of the mounting groove is concavely formed with a first clamping groove and a second clamping groove in the direction of the central axis of the roller, the first clamping positioning column is arranged in the first clamping groove, and the second clamping positioning column is arranged in the second clamping groove.

[0027] The first clamping and positioning column and the second clamping and positioning column have the same outer diameter, and the first clamping and positioning column and the second clamping and positioning column are integrally formed with the clamping protrusion.

[0028] The present invention has the following advantages and beneficial effects: the roller microneedle device provided by the embodiment of the present invention comprises a roller, a left end cover, a right end cover and a microneedle assembly, wherein the left end cover is sleeved on the left end of the roller, and the right end cover is sleeved on the right end of the roller; the microneedle assembly comprises a substrate and microneedles arranged in an array and fixed on the upper surface of the substrate, the substrate is coated on the outer side wall of the roller, when the substrate is unfolded, the top of the microneedle is a platform, and the height of all the microneedles is consistent; the microneedle has no needle tip, and the height of the microneedle is 50-600um; the bottom diameter of the microneedle is 50-300μm, and the top diameter of the microneedle is 1-100μm; through the above design, the roller microneedle device of the present invention has the characteristics of easy operation, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the three-dimensional structure of the roller microneedle device provided in an embodiment of the present invention.

[0030] Figure 2 A schematic diagram of the exploded structure of a roller microneedle device in one direction provided by an embodiment of the present invention.

[0031] Figure 3 A schematic diagram of the exploded structure of the roller microneedle device provided in an embodiment of the present invention from another direction.

[0032] Figure 4 A schematic diagram of the exploded structure of the roller, microneedle assembly and clamping protrusion provided in an embodiment of the present invention.

[0033] Figure 5 A schematic diagram of the exploded structure of the roller and the microneedle assembly provided in an embodiment of the present invention.

[0034] Figure 6 A schematic diagram of the three-dimensional structure of a microneedle assembly provided in an embodiment of the present invention.

[0035] Figure 7 A schematic diagram of the exploded structure of the matching roller and the clamping protrusion provided in an embodiment of the present invention.

[0036] Figure 8 This is an enlarged three-dimensional structural schematic diagram of a roller provided in an embodiment of the present invention.

[0037] Fig. 9 This is an enlarged three-dimensional structural schematic diagram of the clamping protrusion provided in an embodiment of the present invention.

[0038] Fig.10 This is a schematic diagram of the top view of the unfolded microneedle assembly provided by an embodiment of the present invention.

[0039] Fig.11 This is a schematic diagram of the front structural view of the unfolded microneedle assembly provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] like Figures 1 to 11 As shown: a roller microneedle device provided by an embodiment of the present invention comprises a roller 100, a left end cap 101, a right end cap 102 and a microneedle assembly 200, wherein: the left end cap 101 is sleeved on the left end of the roller 100, the right end cap 102 is sleeved on the right end of the roller 100, and the microneedle assembly 200 comprises a substrate 201 and microneedles 202 arranged in an array and fixed on the upper surface of the substrate 201, wherein:

[0045] The microneedle 202 has no needle tip, and the height of the microneedle 202 is 50-600um. The substrate 201 is coated on the outer wall of the roller 100. When the substrate 201 is unfolded, the top of the microneedle 202 is a platform. The height of all the microneedles 202 is consistent. The bottom diameter of the microneedle 202 is 50-300μm, and the top diameter of the microneedle 202 is 1-100μm. The materials used for the substrate 201 and the microneedle 202 are mainly composed of single crystal silicon, medical metal materials, polymer materials, etc., that is, the substrate 201 is a flexible substrate, which is convenient for the substrate 201 to be coated on the roller 100.

[0046] In the present 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 coated 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 coated 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. Such a design can not only facilitate the early assembly, but also adopt automated production, thereby achieving the purpose of improving production efficiency.

[0047] At the same time, the material used for the substrate 201 can also be hyaluronic acid or silk protein or other functional nutrient solution, which can be directly absorbed by the skin to play a role in lifting and tightening; in addition, it can also be used in combination with various functional skin care products, such as acne removal, anti-wrinkle, whitening, breast enhancement, etc. The substrate is not only a carrier for microneedles, but also allows the nutrient solution to act directly on the skin and penetrate directly into the skin.

[0048] Since the microneedles 202 are added to the substrate 201 of the present invention, the microneedles can directly enter the skin, which helps the nutrients to penetrate into the dermis of the skin, further facilitating absorption and providing a beauty care effect.

[0049] The microneedle 202 of the present invention is short and only pierces the stratum corneum of the skin. It is painless, non-invasive, does not cause bleeding, is easy to use, and is quickly absorbed by the skin. Skin care can be performed anytime and anywhere at home or on the road.

[0050] The microneedle 202 is a hollow needle or a solid needle or a combination of a hollow needle and a solid needle, that is, the microneedle 202 can be a combination of a partly solid needle and a partly hollow needle. The shape of the microneedle 202 is a truncated cone.

[0051] One or more mounting grooves 103 are provided on the outer wall of the roller 100 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 .

[0052] A clamping protrusion 104 is provided in the mounting groove 103 so that the substrate 201 is tightly wrapped around the outer 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.

[0053] A plurality of evenly distributed massage protrusions 105 are disposed on the outer side wall of the clamping protrusion 104 .

[0054] When the number of the mounting grooves 103 is one, a first bending portion 210 is provided at one end of the substrate 201, and the first bending portion 210 is located on one side inside the mounting groove 103, and a second bending portion 220 is provided at the other end of the substrate 201, and the second bending portion 220 is located on the other side inside the mounting groove 103.

[0055] Through the above design, that is, the combination of the microneedle assembly 200 and the roller 100, the microneedle assembly 200 and the roller 100 can be fixedly connected by providing one or more mounting grooves 103 and corresponding clamping protrusions 104 on the outer wall of the roller 100. When one mounting groove 103 is provided on the outer wall of the roller 100, the number of clamping protrusions 104 is also one. When the substrate 201 is coated on the outer wall of the roller 100, the clamping protrusion 104 is clamped in the mounting groove 103 to achieve a close 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 is coated on 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 clamped in the mounting groove 104, one side wall of the clamping protrusion 104 firmly presses the first bent portion 210 against an inner side wall of the mounting groove 103, and the other side wall of the clamping protrusion 104 firmly presses the second bent portion 220 against the other inner side wall of the mounting groove 103, and the safety and reliability are further enhanced, thereby achieving the purpose of extending the service life of the roller microneedle device.

[0056] The installation groove 103 is formed by the outer wall of the roller 100 being concave in the direction of the central axis, which is convenient for early processing, and the cross section of the installation groove 103 is an inverted isosceles trapezoid.

[0057] The position where the top of the front side wall of the installation groove 103 combines with the outer side wall of the roller 100 is designed as an arc, and the position where the top of the rear side wall of the installation groove 103 combines with the outer side wall of the roller 100 is designed as an arc.

[0058] Meanwhile, the combination of the microneedle assembly 200 and the roller 100 can be fixed by sticking with double-sided tape or glue; it can also be achieved by adopting the following embodiments, as follows:

[0059] Two first fixing holes 211 are penetrated on the outer wall at one end of the substrate 201, and a first fastening screw is disposed in the first fixing hole 211; two second fixing holes 212 are penetrated on the outer wall at the other end of the substrate 201, and a second fastening screw is disposed 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 is convenient for early assembly and later maintenance and replacement, and at the same time can also improve the firmness of the combination of the substrate 201 and the roller 100, and the safety and reliability are improved.

[0060] At the same time, by respectively providing a first fixing hole 211 and a second fixing hole 212 at both ends of the substrate 201, and respectively providing a first fastening screw and a second fastening screw in the first fixing hole 211 and the second fixing hole 212, 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, and the safety and reliability are improved.

[0061] The right side wall of the left end cover 101 is concavely formed with a first mounting groove 111, which is convenient for the early 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 clamped at the left end of the roller 100 through the first mounting groove 111, and the left end of the substrate 201 is located in the first mounting groove 111. Through the above design, that is, by providing the first safety groove 111 on the right side of the left end cover 101, when the substrate 201 is covered on the roller 100, the left end cover 101 is sleeved on the left end of the roller 100 through the first mounting groove 111, and the left end of the substrate 201 is tightly fixed in the accommodation 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 through the first mounting groove 111, so that the firmness of the combination between the left end of the substrate 201 and the left end of the roller 100 can be enhanced.

[0062] The left side wall of the right end cover 102 is concavely formed with a second mounting groove 112, the outer diameter of which is larger than the outer diameter of the roller, and the right end cover 102 is clamped on 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 the above design, that is, by providing the second safety groove 112 on the left side of the right end cover 102, when the substrate 201 is covered on the roller 100, the right end cover 102 is sleeved on the right end of the roller 100 through the second mounting groove 112, and the right end of the substrate 201 is tightly fixed in the accommodation 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 through the second mounting groove 112, so that the firmness of the combination between the right end of the substrate 201 and the right end of the roller 100 can be enhanced.

[0063] The clamping protrusion 104 has a left side 147, a right side, a front side 142, a rear side 141, 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 clamping protrusion 104, respectively. The top side 144 is an arc surface, and a plurality of massage protrusions 105 are evenly arranged on the top side 144 in the direction of the central axis of the roller 100. Through the above design, that is, a plurality of massage protrusions 105 are evenly arranged on the outer side wall of the clamping protrusion 104. During the rolling process of the roller 100, the microneedles 202 pierce the stratum corneum, so that the nutrient solution directly reaches the deep layer of the skin, and the massage protrusions 105 stimulate the acupuncture points, which has a massage effect, and can also improve the absorption efficiency of the nutrient solution.

[0064] The clamping protrusion 104 is provided with a first clamping positioning column 145 and a second clamping positioning column 146 extending downward from the bottom side surface 143, and the first clamping positioning column 145 and the second clamping positioning column 146 are of equal height. The bottom of the mounting groove 103 is concavely formed with a first clamping groove 131 and a second clamping groove 132 along the direction of the central axis of the roller 100, the first clamping positioning column 145 is disposed in the first clamping groove 131, and the second clamping positioning column 146 is disposed in the second clamping groove 132. Through the above design, that is, the first clamping positioning column 145 and the second clamping positioning column 146 are extended downward on the bottom side of the clamping protrusion 104, and the first clamping groove 131 and the second clamping groove 132 are provided at the bottom of the mounting groove 104. When the clamping protrusion 104 is clamped in the mounting groove 103, the first clamping positioning column 145 is clamped in the first clamping groove 131, and the second clamping positioning column 146 is clamped in the second clamping groove 132, so that the clamping protrusion 104 can be firmly clamped in the mounting groove 104, and the safety and reliability are further improved.

[0065] The outer diameters of the first clamping and positioning column 145 and the second clamping and positioning column 146 are equal, and the first clamping and positioning column 145 and the second clamping and positioning column 146 are integrally formed with the clamping protrusion 104. Through the above design, that is, the first clamping and positioning column 145 and the second clamping and positioning column 146 are integrally formed with the clamping protrusion 104, the initial price is convenient, and the firmness of the combination of the first clamping and positioning column 145 and the second clamping and positioning column 146 with the clamping protrusion 104 can be increased, thereby achieving the purpose of extending the service life.

[0066] In the present invention, the material used for substrate 201 can also be hyaluronic acid, and the material used for microneedles 202 can also be hyaluronic acid. Microneedles 202 are in the shape of a truncated cone, the bottom diameter of microneedles 202 is 200um, the height of microneedles 202 is 300um, and the spacing between microneedles 202 is 0.8mm, which helps the nutrient solution to penetrate into the dermis of the skin. Microneedles 202 are arranged in an array on substrate 201.

[0067] In order to further meet the actual use needs and make its use effect more significant, the preferred solution substrate 201 is made of silk fibroin, the material used for the microneedle 202 is silk fibroin, the bottom diameter of the microneedle 202 is 200um, the height of the microneedle 202 is 600um, and the microneedle height is set to 600um. In order to more conveniently pierce the stratum corneum and allow the nutrient solution to reach the deep layer of the skin, the spacing between the microneedles 202 and the microneedles 202 is 0.6mm, and the microneedles 202 are arranged in an array on the substrate 201.

[0068] Compared with traditional beauty and skin care, beauty liquid enters the skin surface through small holes in the skin. The present invention directly introduces the beauty liquid into the skin surface, which not only improves the beauty efficiency, but also prevents the beauty liquid from being contaminated by the outside world. The pollution-free beauty liquid can be directly introduced into the skin, which is fast and hygienic.

[0069] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A roller microneedle device, characterized in that: It comprises 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; The microneedle assembly includes a substrate and microneedles arranged in an array and fixed on the upper surface of the substrate, wherein the substrate is coated on the outer wall of the roller, and when the substrate is unfolded, the top of the microneedles is a platform, and the heights of all the microneedles are consistent; The microneedle has no needle tip, and the microneedle height 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 microneedle roller device according to claim 1, characterized in that: The microneedle is made of any one of single crystal silicon, medical alloy material, polymer material, hyaluronic acid or silk protein.

3. The microneedle roller device according to claim 1, characterized in that: The microneedle is a hollow needle or a solid needle or a combination of a hollow needle and a solid needle.

4. The microneedle roller device according to claim 1, characterized in that: The microneedle is in the shape of a truncated cone, and the top of the microneedle is located outside the outer side wall of the left end cover or the right end cover.

5. The microneedle roller device according to claim 1, characterized in that: One or more mounting grooves are arranged on the outer side wall of the roller in 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.

6. The microneedle roller device according to claim 5, characterized in that: A clamping protrusion is provided in the mounting groove so that the substrate is tightly wrapped around the outer wall of the roller, the left side of the clamping protrusion is flush with the left end face of the roller, and the right side of the clamping protrusion is flush with the right end face of the roller.

7. The microneedle roller device according to claim 5, characterized in that: When the number of the mounting grooves is one, a first bending portion is provided at one end of the substrate, and the first bending portion is located on one side inside the mounting groove, and a second bending portion is provided at the other end of the substrate, and the second bending portion is located on the other side inside the mounting groove.

8. The microneedle roller device according to claim 6, characterized in that: A plurality of evenly distributed massage convex parts are arranged on the outer side wall of the clamping convex part.

9. The microneedle roller device according to claim 5, characterized in that: The installation groove is formed by the outer side wall of the roller being concave in the direction of the central axis, and the cross section of the installation groove is an inverted isosceles trapezoid.

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

11. The microneedle roller device according to claim 9, characterized in that: The position where the top of the front side wall of the mounting groove is combined with the outer side wall of the roller is designed as an arc, and the position where the top of the rear side wall of the mounting groove is combined with the outer side wall of the roller is designed as an arc.

12. The microneedle roller device according to claim 1, characterized in that: The right side wall of the left end cover is concave 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 clamped on 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.

13. The microneedle roller device according to claim 1, characterized in that: The left side wall of the right end cover is concave 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 clamped on the right end of the roller through the second mounting groove, and the right end of the base plate is located in the second mounting groove.

14. The microneedle roller device according to claim 8, characterized in that: The side surface where the outer wall of the clamping protrusion is located is an arc surface, and the plurality of massage protrusions are evenly located on the outer wall of the clamping protrusion in the direction of the central axis of the roller.

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